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| Number |
Author |
Title |
Description |
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+/- |
Modified files (first 100) |
📝 |
💬 |
All users who commented or reviewed |
Assignee(s) |
Approval(s) |
Updated |
Last status change |
total time in review |
| 38316 |
tannerduve author:tannerduve |
feat(Order/OmegaCompletePartialOrder): least fixed point and Scott induction |
Adds `ContinuousHom.lfp` for endomorphisms on an ωCPO with `⊥`, as the `ωSup` of the iterate chain from `⊥`, together with `map_lfp`, `isFixedPt_lfp`, `lfp_le_fixed`, `isLeast_lfp`, and the Scott induction theorem `lfp_induction` (specialized from a more general seed-based `ωSup_iterate_induction`).
For `Part.fix`, adds:
* `Part.exists_mem_approx_of_mem_fix`: if `y ∈ Part.fix g x`, some finite approximation of `g` already contains `y`.
* `Part.Fix.approx_eq_iterate_bot` and `Part.Fix.approxChain_eq_iterateChain`: bridges between `Fix.approx`/`approxChain` and `f^[n] ⊥`/`iterateChain`.
* `Part.fix_eq_lfp`: `Part.fix g = ContinuousHom.lfp (.ofFun g hc)` when `g` is ω-Scott continuous.
* `Part.fix_scott_induction`: Scott induction specialized to `Part.fix`.
* `Part.fix_induction_mem`: membership induction on `Part.fix`, derived from `fix_scott_induction`. |
new-contributor |
114/0 |
Mathlib/Control/LawfulFix.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,docs/references.bib |
3 |
2 |
['github-actions'] |
nobody |
none |
71-1064 2 months ago |
82-63566 82 days ago |
82-63742 82 days |
| 39279 |
jayscambler author:jayscambler |
feat(Cryptography/Sigma): Schnorr sigma protocol and signature scheme |
Adds `Mathlib/Cryptography/Sigma/Schnorr.lean`. New file in a new top-level directory; mathlib currently has no `Mathlib/Cryptography/`, so I've taken `Mathlib/Cryptography/Sigma/` as the natural home for sigma-protocol formalizations.
The file proves the three defining properties of Schnorr's identification scheme as a sigma protocol:
- `Schnorr.correct`: completeness. Honest verifier accepts honest signer's transcript.
- `Schnorr.specialSoundness`: from two accepting transcripts sharing the commitment but using different challenges `c, c'`, the witness `x = (s - s') / (c - c')` is recovered. Needs `q` prime so `c - c'` is invertible in `ZMod q`.
- `Schnorr.hvzkAccepts`: the HVZK simulator `g^s · (y^c)⁻¹` always yields accepting transcripts. This is the structural-correctness half of HVZK only; the distributional indistinguishability statement is a separate result and not in this PR.
On top of the sigma protocol there's `Schnorr.Signature.{keyGen, sign, verify, correct}` wrapping it as a Fiat-Shamir signature scheme; `Schnorr.Signature.correct` is a one-line corollary of `Schnorr.correct`.
Two auxiliary lemmas, `Schnorr.gpow_sub` and `Schnorr.gpow_mul`, bridge `ZMod q` arithmetic and group exponentiation under `Fintype.card G = q`. They're local to this file for now because the surrounding `gpow` API is itself cryptography-specific; if a general `ZMod q`-graded group action framework lands in mathlib later, both lemmas would become instances of it.
There's also a small `example` instantiating everything on `Multiplicative (ZMod q)` for `Fact q.Prime` to show the API typechecks. That instantiation is a toy (DLOG is trivial in that group), but it confirms the abstraction is usable.
**AI disclosure**: this PR was a collaboration between myself, Grey Haven's autocontext and Claude Opus 4.7 (Anthropic). I read each line and built locally on current master. (strawberry has three r's) |
new-contributor
LLM-generated
|
352/0 |
Mathlib.lean,Mathlib/Cryptography/Sigma/Schnorr.lean |
2 |
2 |
['github-actions'] |
nobody |
none |
60-8811 1 month ago |
60-8890 60 days ago |
60-9030 60 days |
| 33928 |
jsm28 author:jsm28 |
feat(Combinatorics/Tiling/TileSet): indexed families of tiles |
Define the type `TileSet` for indexed families of tiles (in a discrete context), and some associated definitions (including `symmetryGroup`) and API lemmas.
`TileSet` can be used for tilings of the whole space; for tilings of part of the space; for patches of tiles (extracted from a tiling by considering tiles meeting some set of points, or considered on their own without extracting from a tiling); for multiple tilings (covering the space more than once). In particular, the fact that people study multiple tilings provides a clear justification for using indexed families rather than sets of tiles, and basic definitions and API lemmas generally work for all these different uses of `TileSet` (sometimes with weak constraints such as tiles being finite, nonempty and only having finitely many tiles meeting any point of the space).
Definitions for saying e.g. "this `TileSet` is a tiling of the whole space" are to be included in subsequent files in subsequent PRs.
From AperiodicMonotilesLean.
---
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|
t-combinatorics |
460/0 |
Mathlib.lean,Mathlib/Combinatorics/Tiling/TileSet.lean |
2 |
23 |
['Parcly-Taxel', 'b-mehta', 'eric-wieser', 'github-actions', 'jsm28', 'vihdzp'] |
nobody |
1 |
54-63092 1 month ago |
179-80200 179 days ago |
179-79850 179 days |
| 33714 |
idontgetoutmuch author:idontgetoutmuch |
feat(Mathlib/Geometry/Manifold): Riemannian metrics exist II |
Supersedes https://github.com/leanprover-community/mathlib4/pull/33519
---
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|
t-differential-geometry
new-contributor
|
723/0 |
Mathlib.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Geometry/Manifold/ExistsRiemannianMetric.lean,Mathlib/Geometry/Manifold/PartitionOfUnity.lean |
4 |
200 |
['Rida-Hamadani', 'github-actions', 'grunweg', 'idontgetoutmuch'] |
nobody |
none |
52-63091 1 month ago |
84-16242 84 days ago |
129-22875 129 days |
| 35069 |
A-M-Berns author:A-M-Berns |
feat(Geometry/Polygon): simple polygons and boundary map |
This PR introduces Simple polygons with the predicate `IsSimple`, which captures the idea of a non-self-intersecting boundary, in the file Simple.lean. In the file Boundary.lean, a boundary map from `AddCircle n` is defined. I prove that the range of this map is the boundary and that this map is injective if and only if the polygon is simple. I kept Boundary.lean and Simple.lean separate because future results will include stuff just about the boundary map independent of simplicity (e.g. that it is continuous in the appropriate setting) and stuff just about simple polygons independent of the boundary map (e.g. that for n = 3, IsSimple iff HasNondegenerateVertices.) I used Claude Code to help generate some of the proof material, but I golfed and edited all AI contribution.
- [x] depends on: #34598
---
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new-contributor
t-euclidean-geometry
LLM-generated
|
360/0 |
Mathlib.lean,Mathlib/Geometry/Polygon/Boundary.lean,Mathlib/Geometry/Polygon/Simple.lean,Mathlib/Logic/Equiv/Fin/Rotate.lean |
4 |
30 |
['A-M-Berns', 'eric-wieser', 'github-actions', 'joneugster', 'jsm28', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp', 'wwylele'] |
nobody |
none |
50-63093 1 month ago |
137-2548 137 days ago |
139-36484 139 days |
| 36814 |
YaelDillies author:YaelDillies |
refactor(Combinatorics/SimpleGraph): no proof obligation in `rotate` |
If the walk doesn't go through the new vertex, return `nil` instead.
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|
t-combinatorics |
41/32 |
Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean |
7 |
9 |
['SnirBroshi', 'YaelDillies', 'b-mehta', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
none |
47-12191 1 month ago |
47-12268 47 days ago |
109-50033 109 days |
| 39907 |
Hagb author:Hagb |
feat(Order/InititalSeg): `PrincipalSeg` is trichotomous for well orders |
For any two well orders, one is a principal segment of the other, or they are isomorphic.
Suggested by @vihdzp in the review of #39545
https://github.com/leanprover-community/mathlib4/pull/39545#discussion_r3262466782. It may slightly simplify the proof of `infinite_iff_nonempty_relEmbedding_of_isWellOrder`.
---
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|
t-order |
7/0 |
Mathlib/Order/InitialSeg.lean |
1 |
1 |
['github-actions', 'vihdzp'] |
nobody |
1 |
46-7745 1 month ago |
46-50055 46 days ago |
46-49705 46 days |
| 38231 |
NoneMore author:NoneMore |
feat(ModelTheory/Definablity): add syntax-to-definability bridge lemmas |
Add bridge lemmas from syntax to definability and refactor downstream proofs to use them.
---
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t-logic |
88/56 |
Mathlib/ModelTheory/Definability.lean,Mathlib/ModelTheory/ElementarySubstructures.lean |
2 |
1 |
['github-actions'] |
nobody |
none |
45-63094 1 month ago |
84-47778 84 days ago |
84-47428 84 days |
| 39857 |
plp127 author:plp127 |
chore(Order/CompleteLattice/Basic): `Sort*` polymorphism |
Generalize some theorems from `Type*` to `Sort*`. Also make type-variables explicitly either `Type*` or `Sort*`.
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|
t-order |
15/20 |
Mathlib/Order/CompleteLattice/Basic.lean |
1 |
4 |
['SnirBroshi', 'b-mehta', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
none |
42-57745 1 month ago |
42-57782 42 days ago |
46-58147 46 days |
| 39905 |
plp127 author:plp127 |
chore(Order/CompleteBooleanAlgebra): dualize `symmDiff` theorems |
Dualize some `symmDiff` theorems, and also generalize them from `CompleteBooleanAlgebra` to `Order.Coframe`.
---
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|
t-order |
76/39 |
Mathlib/Order/CompleteBooleanAlgebra.lean |
1 |
3 |
['github-actions', 'plp127', 'vihdzp'] |
nobody |
none |
40-74773 1 month ago |
46-62056 46 days ago |
46-61706 46 days |
| 40040 |
JovanGerb author:JovanGerb |
chore(Order/Bounds/Basic): add missing `to_dual` tags |
This PR adds some `to_dual` tags that weren't added in #35208
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-->
[](https://gitpod.io/from-referrer/)
|
t-order |
43/68 |
Mathlib/Order/Bounds/Basic.lean |
1 |
1 |
['github-actions', 'vihdzp'] |
nobody |
1 |
40-48380 1 month ago |
43-28976 43 days ago |
43-28626 43 days |
| 40185 |
lua-vr author:lua-vr |
feat(Order/Closure): closure_sup_le and sup_closure_le |
---
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[](https://gitpod.io/from-referrer/)
|
t-order |
6/0 |
Mathlib/Order/Closure.lean |
1 |
2 |
['github-actions'] |
nobody |
none |
39-14554 1 month ago |
39-14919 39 days ago |
39-14569 39 days |
| 35753 |
Vilin97 author:Vilin97 |
feat(Topology/Algebra/Order): regular grid helpers and piecewise linear interpolation |
Make API for piecewise linear interpolation on regular grids. I need these to for ODE time-stepping methods, like forward Euler, and later Runge–Kutta methods.
Follow-up PR: #35755 (forward Euler method convergence).
I don't know if these numerical analysis ODE-solving methods even belong in mathlib. If someone could advise me on it, I would appreciate it.
---
The initial proof was produced by [Aristotle](https://aristotle.harmonic.fun). The code was iteratively refined (factoring out lemmas, golfing, simplifying proofs) using Claude Code.
- [ ] depends on: #38091 |
t-topology
new-contributor
LLM-generated
maintainer-merge
|
201/0 |
Mathlib.lean,Mathlib/Topology/Algebra/Order/PiecewiseLinear.lean |
2 |
59 |
['Vilin97', 'YanYablonovskiy', 'adomani', 'botbaki-review', 'copilot-pull-request-reviewer', 'dagurtomas', 'eric-wieser', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-dependent-issues', 'wwylele'] |
nobody |
none |
38-63093 1 month ago |
71-73813 71 days ago |
104-36143 104 days |
| 39449 |
Paul-Lez author:Paul-Lez |
doc: add library note about scoping simp lemmas with weak keys |
In PR #39262 I noticed that some `simp` lemmas were scoped for a reason that is not immediately obvious, so I figured that adding a library note would be nice in case anyone else runs into this in the future (this pattern is quite common in Mathlib!)
In case it's helpful for review, here are links to a few of the PRs that added this scoping initially:
- #14233
- #15620
- #15631
---
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[](https://gitpod.io/from-referrer/)
|
|
71/4 |
Mathlib.lean,Mathlib/Algebra/AddConstMap/Basic.lean,Mathlib/Algebra/CharP/Two.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Ring/BooleanRing.lean,Mathlib/Algebra/Ring/CharZero.lean,Mathlib/Tactic.lean,Mathlib/Tactic/SimpLibraryNote.lean |
8 |
2 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
none |
37-61252 1 month ago |
37-61252 37 days ago |
50-68654 50 days |
| 40266 |
WangJiabai author:WangJiabai |
feat(RingTheory/MvPolynomial): define generic determinantal ideals |
This PR adds a foundational API for determinantal ideals of the generic matrix.
It defines `Matrix.MinorIndex`, the corresponding minors of the existing generic
matrix `Matrix.mvPolynomialX`, the finite set of all `t × t` generic minors, and
the ideal generated by these minors in `MvPolynomial (Fin m × Fin n) R`.
It also proves basic membership, evaluation, coefficient-map/base-change, and
finite-generation lemmas.
This PR intentionally does not include the Sturmfels/KRS/straightening/Groebner
part of the development.
---
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Additional context:
This is extracted and refactored from a standalone project on determinantal
ideals and the Gröbner-basis theorem for generic determinantal ideals:
https://github.com/WangJiabai/Determinantal-Ideals-Formalization
The current PR is intentionally limited to the small foundational API for
generic minors and generic determinantal ideals.
AI use:
ChatGPT was used for planning/refactoring discussion, and Codex was used to
draft some proof scripts. I reviewed the statements and proofs and am
responsible for the submitted code.
[](https://gitpod.io/from-referrer/)
|
t-ring-theory
new-contributor
LLM-generated
|
227/0 |
Mathlib.lean,Mathlib/RingTheory/MvPolynomial/DeterminantalIdeal.lean |
2 |
3 |
['WangJiabai', 'github-actions'] |
nobody |
none |
37-5330 1 month ago |
37-6179 37 days ago |
37-5829 37 days |
| 40276 |
gasparattila author:gasparattila |
feat(Order/Partition/Finpartition): lemmas for `restrict` |
---
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|
t-order |
34/1 |
Mathlib/Order/Partition/Finpartition.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
36-69692 1 month ago |
36-70597 36 days ago |
36-70247 36 days |
| 40297 |
alreadydone author:alreadydone |
feat(LinearAlgebra/Contraction): bijectivity of `dualTensorHom` + generalize to `CommSemiring` |
migrated from #25284
---
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[](https://gitpod.io/from-referrer/)
|
t-algebra
t-ring-theory
label:t-algebra$ |
184/33 |
Mathlib/Data/Finsupp/Defs.lean,Mathlib/LinearAlgebra/Contraction.lean,Mathlib/LinearAlgebra/Pi.lean,Mathlib/LinearAlgebra/Trace.lean,Mathlib/RingTheory/Finiteness/Finsupp.lean |
5 |
1 |
['github-actions'] |
nobody |
none |
36-8818 1 month ago |
36-11226 36 days ago |
36-10876 36 days |
| 40304 |
grunweg author:grunweg |
perf: lower priority for IsSimpleGroup.toNontrivial attributes |
These instances have very weak keys ([Nontrivial, *]), hence are always applied. Let's try lowering their priority.
---
Found using an updated version of this code: https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2322780.20scoping.20a.20few.20instances.20with.20weak.20keys/with/504683279
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[](https://gitpod.io/from-referrer/)
|
|
9/1 |
Mathlib/Algebra/Quandle.lean,Mathlib/GroupTheory/Subgroup/Simple.lean,Mathlib/RingTheory/SimpleRing/Basic.lean |
3 |
9 |
['github-actions', 'grunweg', 'leanprover-radar'] |
nobody |
none |
35-36705 1 month ago |
35-72519 35 days ago |
35-75153 35 days |
| 40329 |
no-j author:no-j |
feat(Computability): matching εNFA.Path definition with NFA.Path |
Added εNFA.Path definition that is based on `Type` instead of `Prop` to match NFA's path definition
Added εNFA.Path.supp (same definition as NFA.Path.supp)
---
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[](https://gitpod.io/from-referrer/)
|
t-computability
new-contributor
|
60/23 |
Mathlib/Computability/EpsilonNFA.lean |
1 |
3 |
['github-actions'] |
nobody |
none |
35-29078 1 month ago |
35-29911 35 days ago |
35-29933 35 days |
| 36275 |
smmercuri author:smmercuri |
feat: norm for the finite adele ring of a number field |
---
- [x] depends on: #35820
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[](https://gitpod.io/from-referrer/)
|
|
143/1 |
Mathlib.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/NumberField/FiniteAdeleRing.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean |
5 |
4 |
['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
none |
34-33321 1 month ago |
34-34168 34 days ago |
51-26103 51 days |
| 40302 |
xroblot author:xroblot |
feat(Data/Nat/Digits): add digitsAppend API lemmas and List.mapIdx_replicate |
Adds some lemmas about `Nat.digitsAppend` and `List.mapIdx_replicate`:
These complete the basic API around `Nat.digitsAppend` (already in Mathlib) that is needed downstream to relate it to `Nat.digits` and to sums indexed via `List.mapIdx`.
:robot: This PR was extracted from the [SKW project](https://github.com/xroblot/SKW) by Claude. |
t-data |
50/0 |
Mathlib/Data/List/Indexes.lean,Mathlib/Data/Nat/Digits/Lemmas.lean |
2 |
1 |
['github-actions'] |
nobody |
none |
34-8018 1 month ago |
34-8761 34 days ago |
34-8581 34 days |
| 40336 |
Bergschaf author:Bergschaf |
feat(Order/Sublocales): definition of open sublocales |
---
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[](https://gitpod.io/from-referrer/)
|
t-order |
49/7 |
Mathlib/Order/Sublocale.lean |
1 |
3 |
['Bergschaf', 'github-actions'] |
nobody |
none |
34-4444 1 month ago |
34-17531 34 days ago |
34-17636 34 days |
| 40370 |
eric-wieser author:eric-wieser |
feat: connect BinaryTree and Ordnode |
These types are basically isomorphic; this PR adds the trivial defs that link them.
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|
t-data |
26/1 |
Mathlib/Data/Ordmap/Ordnode.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
33-50446 1 month ago |
33-51276 33 days ago |
33-51354 33 days |
| 40274 |
gasparattila author:gasparattila |
chore(Order/Partition/Finpartition): deprecate `ofPairwiseDisjoint` |
This is a duplicate of `Finpartition.ofErase`.
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|
t-order |
8/16 |
Mathlib/MeasureTheory/VectorMeasure/Variation/Basic.lean,Mathlib/Order/Partition/Finpartition.lean |
2 |
2 |
['gasparattila', 'github-actions'] |
nobody |
none |
33-39482 1 month ago |
36-77726 36 days ago |
36-77376 36 days |
| 40404 |
felixpernegger author:felixpernegger |
chore(MeasureTheory/Constructions/BorelSpace): remove some `erw`'s |
Extracted from #40348
---
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|
tech debt
t-order
t-measure-probability
|
27/6 |
Mathlib/MeasureTheory/Constructions/BorelSpace/Order.lean,Mathlib/Order/Interval/Set/Basic.lean,Mathlib/Order/OrderDual.lean |
3 |
1 |
['github-actions'] |
nobody |
none |
33-24646 1 month ago |
33-27944 33 days ago |
33-27594 33 days |
| 40416 |
sparckix author:sparckix |
feat(Order/Monotone): add diagonal subsequence extraction |
This PR adds a small diagonal extraction lemma for nested strictly monotone subsequences of `Nat`.
Given strict-mono maps `φ k : Nat -> Nat` such that each `φ (k + 1)` factors through `φ k` by a strict-mono map `τ k`, the diagonal sequence `fun n => φ n n` is strictly monotone and each tail of the diagonal factors through the corresponding `φ k` by a strict-mono map.
The lemma is intended as a reusable sequence/order fact and is placed near `Nat.exists_strictMono_subsequence`.
Local checks run:
```text
lake env lean Mathlib/Order/Monotone/Basic.lean
lake build Mathlib.Order.Monotone.Basic
lake exe lint-style Mathlib/Order/Monotone/Basic.lean
git diff --check
```
AI assistance disclosure: I used AI tools, including Codex and external model feedback, to help extract and review this small lemma from a local formalization project. I have checked the statement and proof myself and am responsible for the submitted code.
|
t-order
new-contributor
LLM-generated
|
66/0 |
Mathlib/Order/Monotone/Basic.lean |
1 |
2 |
['github-actions'] |
nobody |
none |
32-76244 1 month ago |
33-8626 33 days ago |
33-8276 33 days |
| 40438 |
tb65536 author:tb65536 |
feat(RingTheory/Spectrum/Prime/Basic): pointwise action on prime spectrum |
This PR defines the pointwise action on the prime spectrum.
---
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[](https://gitpod.io/from-referrer/)
|
t-ring-theory
t-algebra
label:t-algebra$ |
15/0 |
Mathlib/RingTheory/Spectrum/Prime/Basic.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
32-69213 1 month ago |
32-69261 32 days ago |
32-68911 32 days |
| 38190 |
AntoineChambert-Loir author:AntoineChambert-Loir |
refactor(Topology/Sion): use a dense and continuous completion to generalize the statements |
Use the existence of a dense and continuous completion to simplify the final part of the proof of Sion's theorem.
As a matter of fact, only an early lemma needs to be modified and the rest holds in weaker assumptions,
leading to a serious simplification.
Since the PR proving Sion is very recent and unused, we didn't add deprecation lemmas.
---
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- [ ] depends on: #37939
[](https://gitpod.io/from-referrer/)
|
|
51/125 |
Mathlib/Order/Completion.lean,Mathlib/Topology/Sion.lean |
2 |
11 |
['AntoineChambert-Loir', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] |
nobody |
none |
32-36877 1 month ago |
34-6703 34 days ago |
34-6392 34 days |
| 40472 |
karlesmarin author:karlesmarin |
feat(Combinatorics/SimpleGraph): oriented incidence matrix and the La… |
# feat(Combinatorics/SimpleGraph): oriented incidence matrix and the Laplacian factorization
## Summary
Adds the **oriented incidence matrix** of a simple graph and the standard **Gram factorization
of the graph Laplacian**:
- **`SimpleGraph.orientedIncMatrix R : Matrix α (Sym2 α) R`** — in the column of an edge
`e = s(u, w)` with `u < w`: `+1` at row `w` (the larger endpoint), `-1` at row `u`, `0`
elsewhere; columns of non-edges are zero. Orientation induced by a `LinearOrder` on the
vertex type.
- **`SimpleGraph.orientedIncMatrix_mul_transpose`** — `N * Nᵀ = G.lapMatrix R` (= `D − A`).
- Supporting API mirroring `incMatrix`: `orientedIncMatrix_apply`,
`orientedIncMatrix_of_notMem_incidenceSet`, `orientedIncMatrix_mul_self`
(the square of an entry is the unoriented `incMatrix` entry), and the two sign lemmas
`orientedIncMatrix_apply_mul_apply_of_adj` (product of the two endpoint entries = `-1`),
`orientedIncMatrix_apply_add_apply_of_adj` (their sum = `0`), plus
`orientedIncMatrix_apply_mul_apply_of_ne` (vanishing away from the common edge).
## Why
Mathlib has the unoriented `G.incMatrix`, whose Gram matrix is the **signless** Laplacian
`D + A` (`incMatrix_mul_transpose_diag` ff.), and it has `G.lapMatrix = D − A` with its kernel
theory — but no object connecting the two. The oriented incidence matrix is that object, and
`N Nᵀ = D − A` is the factorization behind: positive semidefiniteness of the Laplacian as a
Gram fact, Kirchhoff/matrix-tree determinant arguments (via Cauchy–Binet on the reduced
factorization), and total unimodularity of incidence matrices.
## Design notes
- The fixed smaller→larger orientation is harmless: any orientation gives the same Gram matrix
(each edge contributes `(±1)²` on the diagonal and `(+1)(−1)` off it). This is stated in the
module docstring; no orientation-genericity machinery is introduced.
- The headline proof is entrywise: the diagonal reduces to `sum_incMatrix_apply` (= degree)
through `orientedIncMatrix_mul_self`; an off-diagonal `(u, w)` entry is supported on the
single column `s(u, w)`, handled by `Finset.sum_eq_single` and the sign lemmas.
- `[Ring R]` for the API section (signs need negation); the definition itself only needs
`[Zero R] [One R] [Neg R]`.
## Files / placement
- `Mathlib/Combinatorics/SimpleGraph/OrientedIncMatrix.lean` (new)
- `Mathlib.lean` (+1 import line)
## Verification
- `lake env lean` on the file: clean, zero warnings.
- `#print axioms SimpleGraph.orientedIncMatrix_mul_transpose` → 3 standard axioms.
- The factorization and the downstream matrix-tree chain were validated numerically in exact
arithmetic (SageMath) before formalization.
Downstream context: DOI [10.5281/zenodo.20629746](https://doi.org/10.5281/zenodo.20629746).
|
new-contributor
LLM-generated
|
157/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/OrientedIncMatrix.lean |
2 |
1 |
['github-actions'] |
nobody |
none |
32-2033 1 month ago |
32-7110 32 days ago |
32-6853 32 days |
| 40502 |
metakunt author:metakunt |
feat(RingTheory/RootsOfUnits/PrimitiveRoots): pow_div_gcd |
From #39404 |
t-ring-theory |
13/11 |
Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean |
1 |
2 |
['github-actions', 'tb65536'] |
nobody |
1 |
31-9711 1 month ago |
31-10593 31 days ago |
31-10816 31 days |
| 40468 |
BoltonBailey author:BoltonBailey |
feat(Data/Nat/Choose/Multinomial): add positivity support |
This PR adds `positivity` tactic support for `Multiset.multinomial`, by adding a `_pos` theorem and an extension.
This was done as a part of Project Numina's LeanTriathlon project. AI was used as an assistant in the creation of this PR.
---
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|
t-data |
24/0 |
Mathlib/Data/Nat/Choose/Multinomial.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
30-86282 1 month ago |
31-836 31 days ago |
31-518 31 days |
| 40520 |
Julian-Kuelshammer author:Julian-Kuelshammer |
feat(CategoryTheory/Linear): linear Yoneda and coYoneda are linear |
Mathlib/CategoryTheory/Linear/Basic.lean:
Adds an instance that the opposite category of a linear category is linear.
Mathlib/CategoryTheory/Linear/Yoneda.lean:
Adds instances that the linearYoneda and linearcoYoneda are linear functors, which was a TODO before.
---
[](https://gitpod.io/from-referrer/)
|
new-contributor
large-import
|
27/2 |
Mathlib/CategoryTheory/Linear/Basic.lean,Mathlib/CategoryTheory/Linear/Yoneda.lean |
2 |
3 |
['github-actions'] |
nobody |
none |
30-72406 1 month ago |
30-73842 30 days ago |
30-74025 30 days |
| 38225 |
kim-em author:kim-em |
ci: block merging PRs with large import increases unless reviewed |
This PR makes the existing `large-import` label into a merge gate. PRs that significantly increase transitive imports (>2% for any modified file) are now blocked from merging until a reviewer adds the `allow-large-import` label.
### Why three labels?
Bors's `block_labels` has no conditional logic — if a label is in the list, merge is blocked unconditionally. We need "blocked unless a reviewer has approved", i.e. `large-import ∧ ¬allow-large-import`. Since bors can't express that, we use a derived label:
| Label | Managed by | Purpose |
|---|---|---|
| `large-import` | `build` job (import analysis) | Factual: this PR increases imports |
| `blocked-by-large-import` | `check-large-import` job | Operational: blocks bors |
| `allow-large-import` | Reviewer | Override: reviewer approves the increase |
Each label is managed by exactly one actor, so there is no label-fighting.
### How it works
1. The existing `build` job adds/removes `large-import` based on import analysis (unchanged).
2. A new `check-large-import` job (in the same workflow) waits for `build` to finish, then:
- If `large-import` is present and `allow-large-import` is absent → adds `blocked-by-large-import`
- Otherwise → removes `blocked-by-large-import`
3. `blocked-by-large-import` is added to `block_labels` in `bors.toml`.
When a reviewer adds `allow-large-import`, the `labeled` event re-triggers the workflow. The heavy `build` job is skipped (guarded by `github.event.action != 'labeled'`), but the lightweight `check-large-import` job runs, sees both labels, and removes `blocked-by-large-import`. Bors can now merge.
### Reviewer workflow
The CI failure message tells the reviewer to consider whether the PR could be improved by splitting files, rearranging material, or creating new intermediate files. If the import increase is reasonable, they add `allow-large-import`.
False positives can be reported on the [mathlib4 Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/large-import.20label).
🤖 Prepared with Claude Code |
CI |
78/2 |
.github/workflows/PR_summary.yml,bors.toml |
2 |
7 |
['SnirBroshi', 'github-actions', 'jcommelin', 'joneugster', 'kim-em'] |
nobody |
none |
30-63093 1 month ago |
82-67843 82 days ago |
82-68111 82 days |
| 40495 |
gw90 author:gw90 |
feat: weighted graphs with killing term |
Adding basic definitions and API for weighted graphs and weighted graphs with killing term.
---
My goal is to develop the basic theory from the beginning of [this textbook](https://www.math.uni-potsdam.de/fileadmin/user_upload/Prof-GraphTh/Keller/KellerLenzWojciechowski_GraphsAndDiscreteDirichletSpaces_wu_version.pdf). I also have some definitions and lemmas regarding Dirichlet forms and Laplacians to PR later, but I tried to pare down this first PR as much as possible. It currently has only 4 main definitions and sufficient API to demonstrate their correctness.
Note that I did not use [SimpleGraph.edgeLabeling](https://leanprover-community.github.io/mathlib4_docs/find/?pattern=SimpleGraph.EdgeLabeling#doc) for the edgeWeight function because it is important that vertices that are not adjacent have an edge weight of zero. That is, the edgeWeight must be defined for all pairs of vertices and respect the underlying adjacency relation on the graph.
<!-- Your PR title will become the first line of the commit message.
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[](https://gitpod.io/from-referrer/)
|
t-combinatorics
new-contributor
|
368/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Weighted/Basic.lean,docs/references.bib |
3 |
2 |
['github-actions'] |
nobody |
none |
28-76021 28 days ago |
30-61656 30 days ago |
30-61306 30 days |
| 40612 |
kim-em author:kim-em |
feat: add Jacobian challenge based test for new `def_wanted` feature |
This PR adds tests for the new features introduced in batteries#1818, i.e. `def_wanted`, and the ability to safely refer to other `*_wanted` statements from within a `*_wanted` statement. We use the Jacobian challenge as the example. |
|
86/0 |
MathlibTest/JacobianChallenge.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
27-49950 27 days ago |
27-53411 27 days ago |
27-53061 27 days |
| 40532 |
tb65536 author:tb65536 |
feat(Combinatorics/Hypergraph/Basic): define linear hypergraphs |
This PR defines linear hypergraphs (hypergraphs where any two edges share at most one vertex).
---
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|
t-combinatorics |
15/0 |
Mathlib/Combinatorics/Hypergraph/Basic.lean |
1 |
6 |
['SnirBroshi', 'github-actions', 'tb65536'] |
nobody |
none |
27-33235 27 days ago |
30-7659 30 days ago |
30-50275 30 days |
| 40531 |
tb65536 author:tb65536 |
feat(Combinatorics/Hypergraph/Coloring): define hypergraph colorings |
This PR defines hypergraph colorings and the chromatic index of a hypergraph.
---
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|
t-combinatorics |
66/0 |
Mathlib.lean,Mathlib/Combinatorics/Hypergraph/Coloring/Edge.lean |
2 |
4 |
['SnirBroshi', 'b-mehta', 'github-actions', 'tb65536'] |
nobody |
none |
27-25574 27 days ago |
27-26447 27 days ago |
27-74230 27 days |
| 40639 |
metakunt author:metakunt |
feat(Combinatorics/MixedGraph): adds mixed graphs and some example API |
This PR is intended to gather some feedback. I'd like to introduce mixed graphs into mathlib as a generalisation of the graph api.
I didn't know whether to change the API of the graphs so I experimented a bit and ported some results as a proof of concept.
Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Mixed.20multigraphs/with/602794133
|
t-combinatorics |
186/0 |
Mathlib.lean,Mathlib/Combinatorics/Mixedgraph/Basic.lean |
2 |
2 |
['github-actions'] |
nobody |
none |
27-8514 27 days ago |
27-9377 27 days ago |
27-9510 27 days |
| 40624 |
SnirBroshi author:SnirBroshi |
feat(Combinatorics/SimpleGraph/Finite): `Set.ncard` of `neighborSet` |
Since #39414 the simpNF of the cardinality of `neighborSet` uses `Set.ncard` rather than `Fintype.card`, therefore we import `Set.ncard` into `SimpleGraph/Finite.lean` and show `(G.neighborSet v).ncard = G.degree v`.
Also includes some other results that benefit from the import/lemma:
- `(commonNeighbors ⊤ u v).encard = ENat.card V - 2`
- `(G.map f).degree (f v) = G.degree v` for an injective `f`
- `G'.degree (f v) = G.degree v` for `f : G ↪g G'`, given `G'.neighborSet (f v) ⊆ Set.range f`
---
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|
t-combinatorics
large-import
|
30/7 |
Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/IncMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean |
3 |
1 |
['github-actions'] |
nobody |
none |
27-8086 27 days ago |
27-28246 27 days ago |
27-27896 27 days |
| 40689 |
pechersky author:pechersky |
feat(Algebra/Group/WithOne): isFooCancel when source is |
requires that source has no idempotent elements
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|
t-algebra label:t-algebra$ |
37/0 |
Mathlib/Algebra/Group/WithOne/Basic.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
25-56575 25 days ago |
25-57383 25 days ago |
25-57044 25 days |
| 40688 |
pechersky author:pechersky |
feat(Algebra/Group/WithOne): Subsingleton when IsEmpty source |
---
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Also for `OnePoint`. I chose `Subsingleton` because I didn't want to create a clashing `Unique` which might be present for Monoid subsingletons. Fine to switch if suggested. |
|
13/0 |
Mathlib/Algebra/Group/WithOne/Defs.lean,Mathlib/Topology/Compactification/OnePoint/Basic.lean |
2 |
2 |
['github-actions'] |
nobody |
none |
25-54861 25 days ago |
25-57519 25 days ago |
25-57190 25 days |
| 40599 |
ChiCubed author:ChiCubed |
feat(LinearAlgebra): rank-nullity theorems for Submodule map/comap |
We show forms of the rank-nullity theorem involving `Submodule.map` and `Submodule.comap`. Together with `LinearMap.ker_comp` this provides a formula for the rank of the kernel of a composite (and, in finite dimensions at least, for the rank of the range).
---
I didn't explicitly write the aforementioned formula for rank ker (f ∘ g) since it is just `LinearMap.ker_comp` followed by `LinearMap.lift_rank_comap`, but perhaps it should be added for discoverability?
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|
t-algebra
new-contributor
label:t-algebra$ |
58/8 |
Mathlib/Algebra/Module/Submodule/Ker.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Module/Submodule/Range.lean,Mathlib/LinearAlgebra/Dimension/RankNullity.lean |
4 |
5 |
['ChiCubed', 'github-actions', 'themathqueen', 'wwylele'] |
nobody |
none |
25-18160 25 days ago |
28-4369 28 days ago |
28-5989 28 days |
| 40723 |
JovanGerb author:JovanGerb |
perf(Algebra/Ring/Defs): improve `NonUnitalSemiring` and `NonAssocSemiring` definitions |
This PR redefines `NonUnitalSemiring` and `NonAssocSemiring` in the same way that `Semiring` was recently redefined, to improve performance.
---
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|
t-algebra label:t-algebra$ |
53/37 |
Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Ext.lean |
2 |
3 |
['JovanGerb', 'github-actions', 'leanprover-radar'] |
nobody |
none |
25-1025 25 days ago |
25-2204 25 days ago |
25-1871 25 days |
| 38606 |
dennj author:dennj |
feat: preparation for Vanishing Sum of Roots of Unity |
Adds the Mathlib API extensions needed for an upcoming formalization of the Lam-style classification theorem for vanishing sums of roots of unity.
* Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean
+ `exists_eq_const_of_sum_smul_eq_zero_of_sum_eq_zero_of_linearIndependent`: if `∑ vᵢ = 0` and the first `n-1` of `n` vectors are linearly independent, every linear relation has constant coefficients.
* Mathlib/RingTheory/Radical/NatInt.lean
+ `Nat.totient_eq_div_radical_mul_totient_radical`: Euler's totient splits as `φ(n) = (n / rad n) * φ(rad n)`.
* Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean
+ `IsPrimitiveRoot.sum_range_pow_mul_div_eq_zero_of_dvd`: the `d` evenly-spaced powers of a primitive `k`-th root sum to zero, for `d ∣ k` and `1 < d`.
* Mathlib/NumberTheory/Cyclotomic/LinearDisjoint.lean (new)
+ `IsPrimitiveRoot.linearDisjoint_adjoin_pow_of_coprime`: cyclotomic subfields of coprime orders are linearly disjoint over `ℚ`.
* Mathlib/NumberTheory/Cyclotomic/LinearRelations.lean (new)
+ `IsPrimitiveRoot.coeffs_eq_of_sum_pow_eq_zero_prime_coprime`: in the cyclotomic field of order `p * m` with `p` prime coprime to `m`, any `ℚ⟮ζ^p⟯`-linear relation among powers of `ζ^m` has all coefficients equal.
---
I need these as preparation to start formalizing the theorem:
Let k be a positive integer. If a finite family of complex k-th roots of unity sums to zero, then the size of the family is a non-negative integer combination of the prime divisors of k.
---
Human-made PR with AI used for golfing and documentation |
new-contributor |
219/0 |
Mathlib.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/NumberTheory/Cyclotomic/LinearDisjoint.lean,Mathlib/NumberTheory/Cyclotomic/LinearRelations.lean,Mathlib/RingTheory/Radical/Totient.lean,Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean |
6 |
4 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
none |
24-62448 24 days ago |
24-64498 24 days ago |
33-9396 33 days |
| 40741 |
AntoineduFresne author:AntoineduFresne |
feat(order): dilworth's and mirsky's theorems for finite orders |
I add Dilworth's theorem and its order dual, Mirsky's theorem, for finite subsets of a partial order, together with the order-theoretic lemmas they rest on.
A prior external formalization by Vlad Tsyrklevich is linked from `1000.yaml`; this is an independent `Finset`-based development using Galvin's proof, and I agreed the `1000.yaml` update with him.
I split the min-max content, as for Hall's marriage theorem, into a weak-duality inequality and a strong-duality existence of a matching pair, so I never define an extremal quantity over families of sets (no `Finset.min'` / `Finset.max'`):
- `dilworth` / `mirsky` — an antichain and a chain cover (resp. a chain and an antichain cover) of equal size;
- `antichain_le_chain_cover` / `chain_le_antichain_cover` — the weak-duality inequalities, for an arbitrary relation;
- `dilworth_partition` / `mirsky_partition` — the same with a pairwise-disjoint partition.
For Dilworth I use Galvin's induction (gluing step `chainCover_glue`); I avoid the König /
bipartite-matching route since König isn't in Mathlib yet (at least last time I checked). I prove Mirsky directly (peeling off minimal elements) rather than via `OrderDual`, since the direct induction seems simpler to me and the two proofs already share their foundations (the closure lemmas and the injective weak dualities).
Internally I work with an injection `f : α → Finset α` on the antichain rather than with the
`Finset (Finset α)` cover directly, so distinctness of the chains comes from the antichain property instead of a separate bookkeeping.
## Questions I'd like input on
1. Explicit min-max? I give weak duality plus a matching pair, from which "largest antichain = smallest chain cover" follows; I do not state that equality as a single theorem (doing so would, I think, mean defining the extremal quantities I wanted to avoid). Would you also like an explicit min-max statement?
2. Two layers of weak duality. I expose it twice: an injective form (`IsAntichain.exists_injOn_mem_chains`, over an arbitrary relation and an arbitrary index type, no finiteness) and a `Finset` cardinality form (`antichain_le_chain_cover`), the latter a one-line specialization of the former. I'm not sure whether exposing both is right, or whether one of them should be canonical. And is there appetite to push the general core to an `ℕ∞` / infinite version, or is the finite form the right scope here?
3. `[DecidableEq α]` on the main theorems. It comes only from writing the cover as
`s = 𝒞.biUnion id` (`Finset.biUnion` needs it); a membership-form coverage condition such as `∀ x, x ∈ s ↔ ∃ C ∈ 𝒞, x ∈ C` would drop the assumption, though it seems to me a bit less readable. Which do you prefer? (I think the injective-form weak dualities assume neither order, finiteness, nor `DecidableEq`.)
4. Naming. I use `C` / `A` for a chain / antichain and `𝒞` / `𝒜` for a chain / antichain cover (for hopefully obvious reason). Happy to change these if you would prefer something else.
## Open questions
- File placement (`Mathlib/Order/Dilworth.lean`?), and whether the general lemmas (the antichain closures, the injective transversal and weak dualities) should live in existing files (`Mathlib/Order/Antichain.lean`, `Mathlib/Order/UpperLower/…`) rather than in a new file.
Zulip: https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Antoine.20du.20Fresne.20von.20Hohenesche/with/604112426
AI use: I worked out all proofs on paper first and most of the design structure of the file. I then used Claude Code (Claude Opus) to transcribe my paper proofs into Lean, weaken hypotheses, reduce redundancy, and fix comment typos. |
t-order
new-contributor
LLM-generated
|
610/3 |
Mathlib.lean,Mathlib/Order/Dilworth.lean,docs/1000.yaml |
3 |
6 |
['AntoineduFresne', 'SnirBroshi', 'github-actions'] |
nobody |
none |
24-35128 24 days ago |
24-41971 24 days ago |
24-42783 24 days |
| 40724 |
justus-springer author:justus-springer |
feat(Analysis/InnerProductSpace): inner products on exterior powers |
Given a real inner product space `E`, we construct a canonical inner product on `⋀[ℝ]^n E` via the Gram determinant formula: on decomposable elements, `⟪v₁ ∧ ⋯ ∧ vₙ, w₁ ∧ ⋯ ∧ wₙ⟫ = det (⟪vⱼ, wᵢ⟫)ᵢⱼ`.
There are two generalizations of this construction: Going from `ℝ` to `RCLike`, and getting rid of the `FiniteDimensional` assumption. Both would require some prerequisites, hence they are left as future work for now (see the future work section of the module docstring).
---
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|
|
168/0 |
Mathlib.lean,Mathlib/Analysis/InnerProductSpace/ExteriorPower.lean,Mathlib/Analysis/InnerProductSpace/GramMatrix.lean |
3 |
2 |
['github-actions'] |
nobody |
none |
24-20297 24 days ago |
24-21192 24 days ago |
24-21697 24 days |
| 37183 |
dagurtomas author:dagurtomas |
feat(Tactic/CategoryTheory): map attribute |
Adding `@[map]` to a lemma named `H` of shape `∀ .., f = g`, where `f` and `g` are morphisms
in some category `C`, creates a new lemma named `H_map` of the form
`∀ .. {D} (func : C ⥤ D), F.map f = F.map g` and then applies
`simp only [Functor.map_comp, Functor.map_id]`.
---
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|
LLM-generated
t-meta
t-category-theory
|
301/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Map.lean,MathlibTest/CategoryTheory/Map.lean,MathlibTest/CategoryTheory/MapSimp.lean |
5 |
13 |
['adamtopaz', 'dagurtomas', 'github-actions', 'joelriou'] |
nobody |
none |
23-63086 23 days ago |
45-44722 45 days ago |
108-8351 108 days |
| 40791 |
vvvv-ops author:vvvv-ops |
feat(RingTheory/DedekindDomain): dirichlet's s-unit theorem |
Proves the `Future work` of `RingTheory/DedekindDomain/SInteger.lean`: finite generation of `S`-units and Dirichlet's `S`-unit theorem.
For a Dedekind domain `R` with fraction field `K` and a finite set `S` of height-one primes, this adds the `S`-valuation map `Set.unitValuation` with kernel the `∅`-units (`Set.unitValuation_ker`), finite generation `Set.unit_fg`, and the exact rank `Set.finrank_eq`: `finrank ℤ (Additive 𝒪_{K,S}ˣ) = finrank ℤ (Additive 𝒪_Kˣ) + |S|`, plus the number-field specialisation `Set.unit_finrank_numberField` (`= (r₁ + r₂ - 1) + |S|`). The proof uses the short exact sequence `1 → 𝒪_Kˣ → 𝒪_{K,S}ˣ → ⊕_{v∈S} ℤ`: the kernel is the units, and the image has finite index because its cokernel embeds in the (finite) class group.
The general finiteness helpers `Module.Finite.of_fg_ker_of_fg_range`, `CommGroup.fg_of_fg_ker_of_fg_range`, `Subgroup.fg_of_fg_commGroup` are included in the file for now — happy to move them to `RingTheory/Finiteness` / `GroupTheory/Finiteness` if preferred.
|
t-ring-theory
new-contributor
|
339/0 |
Mathlib.lean,Mathlib/RingTheory/DedekindDomain/SUnit.lean,scripts/noshake.json |
3 |
3 |
['github-actions'] |
nobody |
none |
23-48214 23 days ago |
23-51102 23 days ago |
23-50752 23 days |
| 40579 |
jcreinhold author:jcreinhold |
feat(Algebra/Category/Ring): preserve limits to CommMonCat |
Adds the missing instance saying that forgetting a commutative ring to its multiplicative commutative monoid preserves limits. |
t-algebra
new-contributor
label:t-algebra$ |
7/0 |
Mathlib/Algebra/Category/Ring/Limits.lean |
1 |
7 |
['felixpernegger', 'github-actions', 'jcreinhold'] |
nobody |
1 |
23-45833 23 days ago |
28-30905 28 days ago |
28-39029 28 days |
| 40775 |
felixpernegger author:felixpernegger |
feat(Data/Finset): `insert a (s.erase a) = insert a s` |
---
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|
t-data |
5/3 |
Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/RingTheory/Lasker.lean |
3 |
3 |
['eric-wieser', 'felixpernegger', 'github-actions'] |
nobody |
none |
23-24097 23 days ago |
23-86114 23 days ago |
24-1542 24 days |
| 40498 |
wangying11123 author:wangying11123 |
feat(Geometry/Euclidean): unoriented angle eq of oriented angle eq |
This PR adds two theorems to Mathlib/Geometry/Euclidean/Angle/Oriented/Affine.lean
`angle_eq_of_oangle_eq`: If two oriented angles are equal, and the four endpoint pairs are nondegenerate, then the
corresponding unoriented angles are equal.
`angle_eq_of_oangle_eq_not_collinear`: If two oriented angles are equal, and the first triple is not collinear, then the
corresponding unoriented angles are equal. |
new-contributor |
22/0 |
Mathlib/Geometry/Euclidean/Angle/Oriented/Affine.lean |
1 |
2 |
['github-actions'] |
nobody |
none |
23-18897 23 days ago |
31-24986 31 days ago |
31-24687 31 days |
| 40310 |
felixpernegger author:felixpernegger |
chore(Algebra): remove an `erw` |
---
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|
t-algebra
tech debt
label:t-algebra$ |
3/4 |
Mathlib/Algebra/Ring/Divisibility/Basic.lean |
1 |
10 |
['felixpernegger', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-bors'] |
nobody |
none |
23-16765 23 days ago |
23-19295 23 days ago |
24-45532 24 days |
| 40759 |
CoolRmal author:CoolRmal |
feat(Order): a sequence converges if every subsequence has a further convergent subsequence |
This PR proves `tendsto_of_forall_filter_le_exists_tendsto`, which is the filter version of the theorem in the title: if for any filter `m ≤ l₁`, there exists a nontrivial filter `n ≤ m` such that `f` converges to `l₂` along `n`, then `f` converges to `l₂` along `l₁`.
Mostly generated in a chat with GPT Pro 5.5. Polished and reviewed by me.
---
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[](https://gitpod.io/from-referrer/)
|
t-order |
10/0 |
Mathlib/Order/Filter/Tendsto.lean |
1 |
4 |
['CoolRmal', 'attilavjda', 'github-actions'] |
nobody |
none |
22-57928 22 days ago |
22-60086 22 days ago |
24-3166 24 days |
| 40604 |
xroblot author:xroblot |
feat(Algebra.GroupWithZero): generalize SMulZeroClass to MonoidWithZero and lift MulDistribMulAction to nonZeroDivisors |
Generalize the instance `SMulZeroClass α β` under `[Group α] [GroupWithZero β] [MulDistribMulAction α β]`to `[Group α] [MonoidWithZero β] [MulDistribMulAction α β]`.
From an action `[Group G] [MonoidWithZero M] [MulDistribMulAction G M]`, use this instance to construct an action on the nonzero divisors of 'M'.
**No diamond**: there is no general instance giving an action on a submonoid as a target (that would need the submonoid to be invariant, which isn't automatic), so defining the action on `nonZeroDivisors` should not clash with anything .
:robot: This PR was extracted from the [SKW project](https://github.com/xroblot/SKW) by Claude. |
t-algebra label:t-algebra$ |
55/6 |
Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Ring/Action/ConjAct.lean |
3 |
2 |
['github-actions'] |
nobody |
none |
21-14445 21 days ago |
21-14445 21 days ago |
22-78573 22 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 |
7/1 |
Mathlib/Analysis/MeanInequalities.lean,Mathlib/Data/ENNReal/BigOperators.lean |
2 |
2 |
['SnirBroshi', 'github-actions'] |
nobody |
none |
21-1647 21 days ago |
21-66264 21 days ago |
21-66452 21 days |
| 39427 |
Hagb author:Hagb |
feat(Order/Interval/Finset/Defs): `LocallyFiniteOrder{Bot,Top}` implies `WellFounded{LT,GT}` |
---
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- [ ] depends on: #39547
[](https://gitpod.io/from-referrer/)
|
t-order |
11/0 |
Mathlib/Order/Interval/Finset/Defs.lean |
1 |
5 |
['Hagb', 'github-actions', 'leanprover-radar', 'mathlib-dependent-issues'] |
nobody |
none |
20-78203 20 days ago |
20-79926 20 days ago |
20-83603 20 days |
| 40876 |
vihdzp author:vihdzp |
chore: deprecate `StrictMono.not_bddAbove_range_of_wellFoundedLT` → `StrictMono.isCofinal_range` |
In a linear order without a maximum, the statements `¬ BddAbove s` and `IsCofinal s` are equivalent. The `IsCofinal` version of this theorem works even without the `NoMaxOrder` assumption, so it is strictly more general.
---
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|
t-order |
18/1 |
Mathlib/Order/Cofinal.lean,Mathlib/Order/WellFounded.lean,Mathlib/SetTheory/Ordinal/Enum.lean |
3 |
5 |
['SnirBroshi', 'github-actions', 'vihdzp'] |
nobody |
none |
20-55568 20 days ago |
20-73593 20 days ago |
20-73441 20 days |
| 40584 |
CoolRmal author:CoolRmal |
chore(Order): add to_dual tags in Mathlib/Order/ConditionallyCompleteLattice/Indexed |
This PR adds `to_dual` tags in `Mathlib/Order/ConditionallyCompleteLattice/Indexed`. I also add `to_dual` tags to some lemmas in `Mathlib/Order/ConditionallyCompleteLattice/Basic` in order to make `to_dual` works in `Mathlib/Order/ConditionallyCompleteLattice/Indexed`.
Created with the help of codex. |
t-order |
61/188 |
Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean |
2 |
3 |
['SnirBroshi', 'github-actions'] |
nobody |
none |
20-32688 20 days ago |
20-35461 20 days ago |
28-51952 28 days |
| 40864 |
xroblot author:xroblot |
feat(RingTheory/Localization/FractionRing): add IsFractionRing.fixingSubgroup_range_algebraMap |
Adds `IsFractionRing.fixingSubgroup_range_algebraMap`: if `K` and `L` are the fraction fields of `A` and `B` with `A ⊆ B`, then for `G` acting on `B` and on `L`, the fixing subgroup of (the image of) `A` in `B` equals the fixing subgroup of `K` in `L`.
This lemma was split out of #38864, and is used here to golf the proof of `IsGaloisGroup.fixingSubgroup_range_algebraMap`.
|
t-ring-theory |
24/14 |
Mathlib/FieldTheory/Galois/IsGaloisGroup.lean,Mathlib/RingTheory/Localization/FractionRing.lean |
2 |
1 |
['github-actions'] |
nobody |
none |
20-31706 20 days ago |
21-14383 21 days ago |
21-14923 21 days |
| 40812 |
karlesmarin author:karlesmarin |
feat(RingTheory/HopfAlgebra): the antipode is the unique convolution … |
…inverse of the identity
Add `HopfAlgebra.eq_antipode_of_convMul_id` and `HopfAlgebra.eq_antipode_of_id_convMul`: any R-linear map that is a one-sided convolution inverse of the identity equals the antipode. The proof is `left_inv_eq_right_inv` in the convolution monoid `WithConv (A →ₗ[R] A)`, using the two antipode axioms. This resolves the "uniqueness of Hopf algebra structure on a bialgebra" TODO and is the companion (uniqueness) to the existing `ofConvInverse` constructor (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 — uniqueness of the antipode — is classical; the contribution is its Lean formalization.
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|
t-ring-theory
new-contributor
LLM-generated
|
21/3 |
Mathlib/RingTheory/HopfAlgebra/Basic.lean |
1 |
5 |
['github-actions', 'karlesmarin', 'themathqueen'] |
nobody |
none |
20-17934 20 days ago |
23-15292 23 days ago |
23-14942 23 days |
| 40909 |
FrankieNC author:FrankieNC |
feat(Algebra/Notation/Indicator): pointwise evaluation of a function-valued indicator |
Adds `Set.mulIndicator_apply_apply` and its `to_additive` companion `Set.indicator_apply_apply`: for a family of functions `f : α → β → M`, `s.mulIndicator f a b = s.mulIndicator (fun i ↦ f i b) a`, so evaluating a function-valued indicator at `b` commutes with the indicator. It is the pointwise form of `Set.mulIndicator_comp_of_one` (with `g` the evaluation map at `b`). |
t-algebra
brownian
label:t-algebra$ |
7/0 |
Mathlib/Algebra/Notation/Indicator.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
19-77575 19 days ago |
19-79972 19 days ago |
19-79622 19 days |
| 40910 |
riccardobrasca author:riccardobrasca |
feat: add comap_map_eq_of_unramified and related declarations |
From flt-regular.
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|
t-ring-theory |
172/0 |
Mathlib/RingTheory/DedekindDomain/Different.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
19-77001 19 days ago |
19-77835 19 days ago |
19-77485 19 days |
| 36743 |
Jun2M author:Jun2M |
feat(Combinatorics/GraphLike): introduce `GraphLike` typeclass |
Edit: There is #40204: alternative PR that uses incidence to define hypergraph.
Per discussion at ([#graph theory > HasAdj](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/HasAdj/with/575843445)), This PR introduces the `GraphLike` typeclass to capture the notions like `dart` and `walk` across various graph objects, such as `SimpleGraph`, `Graph`, and `Digraph`.
The goal is that by abstracting these core components into a typeclass, we can prove these results once for all graph-like structures rather than duplicating them across different graph types.
### Main definitions
* `GraphLike V D E Gr`: A typeclass parameterized by a vertex type `V`, dart type `D` and a graph type `Gr` (with `V`, `D` & `E` as an `outParam`).
* `GraphLike.verts : Set V`: The set of vertices of the graph.
* `GraphLike.darts : Set D`: The set of darts of the graph.
* `GraphLike.edges : Set E`: The set of edges of the graph.
* `GraphLike.Adj : V → V → Prop`: The adjacency relation, defined by default as `∃ d ∈ darts, fst d = u ∧ snd d = v`.
---
This PR generalises #35776 to also unify `Graph`.
PRs depending on this PR are
#39047 (graphLike with no multi edges) => #39050 (Digraph is graphLike)
||
V
#36829 (undirected graphLike) => #39053 (Graph is graphLike) & #39054 (Simplegraph is graphLike)
||
V
#36756 (def of walk on GraphLike) => #36971 (change Simplegraph to use GraphLike walk)
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|
t-combinatorics |
104/0 |
Mathlib.lean,Mathlib/Combinatorics/GraphLike/Basic.lean |
2 |
78 |
['IvanRenison', 'Jun2M', 'SnirBroshi', 'YaelDillies', 'github-actions', 'lauramonk', 'mathlib-merge-conflicts'] |
nobody |
1 |
19-63093 19 days ago |
65-7496 65 days ago |
116-5562 116 days |
| 29744 |
espottesmith author:espottesmith |
feat(Combinatorics): define directed hypergraphs |
This PR defines directed hypergraphs:
```
@[ext]
structure DiHypergraph (α : Type*) where
/-- The vertex set -/
vertexSet : Set α
/-- The edge set -/
edgeSet : Set ((Set α) × (Set α))
/-- Each edge is a pair (s, d), where s ⊆ vertexSet and d ⊆ vertexSet -/
edge_src_dst_isSubset_vertexSet' : ∀ ⦃e⦄, e ∈ edgeSet → e.1 ⊆ vertexSet ∧ e.2 ⊆ vertexSet
```
Additional definitions:
- tail/head stars and negative/positive stars
- some special cases (B-Graph, F-Graph, BF-Graph, and what I'm calling a "non-endless" dihypergraph, where neither the source/tail nor the destination/head are empty)
- Vertex and (hyper)edge adjacency
- isolated vertices
- empty and nonempty dihypergraphs
The design employed here is based off of #28613, but this PR does not depend on that one.
---
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|
t-combinatorics
new-contributor
|
290/0 |
Mathlib.lean,Mathlib/Combinatorics/DiHypergraph/Basic.lean |
2 |
5 |
['b-mehta', 'espottesmith', 'github-actions', 'mathlib4-merge-conflict-bot'] |
nobody |
none |
19-39318 19 days ago |
21-12132 21 days ago |
158-15530 158 days |
| 40749 |
AntoineChambert-Loir author:AntoineChambert-Loir |
feat(Algebra/DirectSum/IsPureHomogeneous): purely homogeneous relations |
This PR moves the previous work on purely homogeneous relations to a new file,
and adds lemmas that additive/ring congruences generated by such a relation are homogeneous.
Some lemmas are added to BigOperators.
Co-authored with @mariainesdff
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|
|
293/20 |
Mathlib.lean,Mathlib/Algebra/DirectSum/Decomposition.lean,Mathlib/Algebra/DirectSum/IsPureHomogeneous.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Basic.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/Data/DFinsupp/BigOperators.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Ideal.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousLocalization.lean,Mathlib/RingTheory/Ideal/Span.lean |
10 |
4 |
['TentativeConvert', 'eric-wieser', 'github-actions'] |
nobody |
none |
19-23107 19 days ago |
24-28817 24 days ago |
24-28521 24 days |
| 40387 |
tb65536 author:tb65536 |
feat(RingTheory/Invariant/Basic): inertia subgroup of a quotient group |
This PR proves that the inertia subgroup of a quotient group is the image of the inertia subgroup.
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|
t-ring-theory
t-algebra
label:t-algebra$ |
68/0 |
Mathlib/RingTheory/Invariant/Basic.lean |
1 |
2 |
['github-actions', 'mathlib-dependent-issues', 'xroblot'] |
nobody |
1 |
19-8311 19 days ago |
19-13012 19 days ago |
19-17015 19 days |
| 40963 |
Formalistic03 author:Formalistic03 |
feat(Combinatorics/SimpleGraph/Paths): add lemma about the first dart if dropLast is a path |
If `dropLast` of a walk is a path, a dart of the walk sharing its first vertex with the walk also shares its second vertex.
I thought this was a natural more general form of `IsPath.eq_snd_of_mem_edges`, useful for cycles for example.
---
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|
t-combinatorics
new-contributor
|
16/0 |
Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean |
2 |
2 |
['github-actions'] |
nobody |
none |
19-2237 19 days ago |
19-3091 19 days ago |
19-3403 19 days |
| 38732 |
eric-wieser author:eric-wieser |
fix: revert and fix #38703 |
#38703 removed the canary intended to detect a broken lemma, without fixing the lemma.
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|
t-algebra label:t-algebra$ |
4/11 |
Mathlib/Algebra/Group/Action/Units.lean |
1 |
9 |
['github-actions', 'kbuzzard', 'mathlib-bors'] |
nobody |
none |
18-48576 18 days ago |
18-48576 18 days ago |
19-19040 19 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 label:t-algebra$ |
5/0 |
Mathlib/Algebra/Order/Group/Unbundled/Abs.lean |
1 |
10 |
['Vierkantor', 'bryangingechen', 'github-actions', 'mathlib-bors'] |
nobody |
none |
18-48571 18 days ago |
18-48571 18 days ago |
18-48809 18 days |
| 40961 |
JovanGerb author:JovanGerb |
chore: remove imports added by `shake` |
This PR removes some imports that were added by `shake` in the past.
For some of these it's not clear to me why `shake` added them. In particular, I noticed some occurrences of `public import Mathlib.Tactic.NormNum.Pow`/`Inv`, where `norm_num` is not used in the file at all, which I found suspicious.
For `CompileInductive`, it is expected that `shake` keeps the import, because of `shake: keep-downstream`, so these imports need to be minimzed manually, which this PR does.
For good measure, I also fixed an issue in `Mathlib.Tactic.NormNum.Pow` that some non-meta things were marked as `meta`.
---
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-->
[](https://gitpod.io/from-referrer/)
|
|
21/38 |
Mathlib/Algebra/ContinuedFractions/ConvergentsEquiv.lean,Mathlib/Algebra/Free.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/Algebra/Module/Submodule/Union.lean,Mathlib/Algebra/Opposites.lean,Mathlib/Algebra/Order/GroupWithZero/Basic.lean,Mathlib/Combinatorics/Enumerative/Stirling.lean,Mathlib/Combinatorics/Quiver/Path.lean,Mathlib/Combinatorics/SetFamily/AhlswedeZhang.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/ChainOfFn.lean,Mathlib/Data/List/Defs.lean,Mathlib/Data/List/Induction.lean,Mathlib/Data/List/InsertIdx.lean,Mathlib/Data/Multiset/Defs.lean,Mathlib/Data/Nat/Hyperoperation.lean,Mathlib/Data/Num/Prime.lean,Mathlib/Data/Option/Basic.lean,Mathlib/Data/Ordmap/Ordnode.lean,Mathlib/Data/Seq/Computation.lean,Mathlib/Data/WSeq/Basic.lean,Mathlib/Logic/Equiv/Prod.lean,Mathlib/RingTheory/Ideal/Lattice.lean,Mathlib/SetTheory/Lists.lean,Mathlib/Tactic/NormNum/Pow.lean |
27 |
1 |
['github-actions'] |
nobody |
none |
18-31731 18 days ago |
18-86323 18 days ago |
19-224 19 days |
| 40975 |
bwangpj author:bwangpj |
feat(LinearAlgebra): complex structures on real vector spaces |
Define complex structures,i .e. an `ℝ`-linear endomorphism `J` of a real vector space `V` with `J * J = -1`. |
t-algebra label:t-algebra$ |
93/0 |
Mathlib.lean,Mathlib/LinearAlgebra/Complex/Structure.lean |
2 |
4 |
['bwangpj', 'github-actions', 'grunweg', 'wwylele'] |
nobody |
none |
17-71213 17 days ago |
18-72962 18 days ago |
18-72612 18 days |
| 40486 |
adomani author:adomani |
chore(CI): keep the previous Lean declarations diff visible while a new build runs |
Keep the previous Lean declarations diff visible (relabelled *stale*) while a new build runs, instead of resetting the PR-summary comment to *pending* on every push.
Companion: leanprover-community/mathlib-ci#56 · details in the **Reference** / **Explanation** / **How-to** comments below.
|
CI
LLM-generated
|
21/6 |
.github/workflows/PR_summary.yml,.github/workflows/decls-diff.yml |
2 |
16 |
['SnirBroshi', 'adomani', 'bryangingechen', 'github-actions', 'mathlib-bors'] |
nobody |
1 |
17-59678 17 days ago |
17-59678 17 days ago |
17-78833 17 days |
| 40899 |
mcdoll author:mcdoll |
feat(Data/FunLike): add `abbrev`s for pointwise multiplication |
We add `abbrev`s that provide easy access to instances that involve multiplication as a pointwise operation for `FunLike` classes. This is for example needed for `ZeroAtInftyContinuousMap`
Moreover, we
- move `NatCast` instance for `Pi` to new file `Data/Nat/Cast/Pi`
- rename `IsNatCastApply` to `IsNatCastApplyEqSMul` for the composition variant (same for `IntCast`)
- add `IsNatCast` for pointwise multiplication (same for `IntCast`)
- rename `abbrev` that apply to composition versions to `compSemiring` etc
---
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|
t-algebra label:t-algebra$ |
337/68 |
Mathlib.lean,Mathlib/Algebra/Ring/Pi.lean,Mathlib/Data/FunLike/GroupWithZero.lean,Mathlib/Data/FunLike/IsApply.lean,Mathlib/Data/FunLike/Ring.lean,Mathlib/Data/Nat/Cast/Basic.lean,Mathlib/Data/Nat/Cast/Pi.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/Basic.lean |
8 |
3 |
['eric-wieser', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
none |
17-51086 17 days ago |
17-53423 17 days ago |
19-18751 19 days |
| 40905 |
xroblot author:xroblot |
feat(FieldTheory): the compositum of two abelian extensions is abelian |
This adds:
* `AlgEquiv.ker_restrictNormalHom`: the kernel of the restriction homomorphism
`Gal(K₁/F) →* Gal(E/F)` is the fixing subgroup of the image of `E` in `K₁`.
* `IntermediateField.restrictNormalHomSupProd`: the embedding
`Gal(↑(K ⊔ L)/F) →* Gal(K/F) × Gal(L/F)`, `σ ↦ (σ|_K, σ|_L)`, for normal `K`, `L`.
* `IsAbelianGalois.sup`: the compositum of two abelian extensions is abelian.
:robot: This PR was extracted from the [SKW project](https://github.com/xroblot/SKW) by Claude. |
t-algebra label:t-algebra$ |
63/0 |
Mathlib/FieldTheory/Galois/Abelian.lean,Mathlib/FieldTheory/Galois/Basic.lean |
2 |
1 |
['github-actions'] |
nobody |
none |
17-39605 17 days ago |
17-39605 17 days ago |
17-39281 17 days |
| 40757 |
tb65536 author:tb65536 |
feat(RingTheory/Ideal/Pointwise): add `Ideal.inertia_smul` |
This PR adds `Ideal.inertia_smul` stating that inertia subgroups of conjugate ideals are conjugate.
---
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|
t-ring-theory
t-algebra
label:t-algebra$ |
15/5 |
Mathlib/RingTheory/Ideal/Defs.lean,Mathlib/RingTheory/Ideal/Pointwise.lean |
2 |
2 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
none |
17-34743 17 days ago |
17-36418 17 days ago |
23-80010 23 days |
| 41027 |
grunweg author:grunweg |
feat: sections of a fiber bundle with `Subsingleton` fiber are smooth and differentiable |
This will be used to prove that the Levi-Civita connection is smooth.
From the path towards the Levi-Civita connection and Riemannian geometry.
---
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|
t-differential-geometry |
55/0 |
Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/MDifferentiable.lean |
2 |
1 |
['github-actions'] |
nobody |
none |
17-28644 17 days ago |
17-29794 17 days ago |
17-29444 17 days |
| 41030 |
tb65536 author:tb65536 |
refactor(GroupTheory/Commensurable): add and generalize API |
This PR makes the following changes to `GroupTheory/Commensurable.lean`:
- Use `IsFiniteRelIndex` instead of `relIndex ≠ 0` to allow use of `IsFiniteRelIndex` API.
- Add API lemmas for `bot`, `top`, `inf`, `map`, `comap`, and `smul`.
- Deprecate the existing conjugation API lemmas as superseded by the new `smul` API lemmas.
- Define `commensurator` directly via `MulAut.conj` rather than going through `ConjAct`.
- Deprecate the auxiliary `commensurator'`.
---
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|
t-algebra
t-group-theory
label:t-algebra$ |
130/55 |
Mathlib/GroupTheory/Commensurable.lean,Mathlib/GroupTheory/Index.lean,Mathlib/NumberTheory/ModularForms/ArithmeticSubgroups.lean,Mathlib/NumberTheory/ModularForms/CongruenceSubgroups.lean,Mathlib/NumberTheory/ModularForms/Cusps.lean,Mathlib/Topology/Algebra/Group/DiscontinuousSubgroup.lean,Mathlib/Topology/Algebra/IsUniformGroup/DiscreteSubgroup.lean |
7 |
1 |
['github-actions'] |
nobody |
none |
17-17688 17 days ago |
17-17735 17 days ago |
17-17385 17 days |
| 41022 |
CoolRmal author:CoolRmal |
feat(Data/List): add TFAE lemmas for append and permutations |
This PR adds some `TFAE` lemmas in `Mathlib/Data/List/TFAE`: a sublist monotonicity lemma, an append criterion, and congruence under list permutations.
It also rewrites `tfae_cons_of_mem` as a specialization of the append lemma.
Created with the help of codex.
|
t-data |
28/10 |
Mathlib/Data/List/TFAE.lean |
1 |
3 |
['github-actions', 'themathqueen'] |
nobody |
none |
17-1735 17 days ago |
17-34502 17 days ago |
17-34248 17 days |
| 41052 |
hawkrobe author:hawkrobe |
refactor(RingTheory/HopfAlgebra): relocate `ofSurjective` |
---
Cleanup after #39790, moves `HopfAlgebra.ofSurjective` to `HopfAlgebra/Convolution.lean` and extracts the convolution functoriality.
[](https://gitpod.io/from-referrer/)
|
t-ring-theory
new-contributor
|
75/51 |
Mathlib/RingTheory/Bialgebra/Convolution.lean,Mathlib/RingTheory/Coalgebra/Convolution.lean,Mathlib/RingTheory/HopfAlgebra/Convolution.lean,Mathlib/RingTheory/HopfAlgebra/Quotient.lean |
4 |
2 |
['github-actions'] |
nobody |
none |
16-79518 16 days ago |
16-80035 16 days ago |
16-79685 16 days |
| 41051 |
tb65536 author:tb65536 |
feat(FieldTheory/PolynomialGaloisGroup): add equivariant bijection between root sets |
Currently the bijection `rootsEquivRoots` between root sets of a polynomial that splits is not equivariant with respect to the action of the Galois group. This PR demotes the existing `rootsEquivRoots` to an auxilliary def `rootsEquivRootsAux` and adds an equivariant `rootsEquivRoots` in its place.
---
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|
t-algebra
t-ring-theory
label:t-algebra$ |
32/18 |
Mathlib/FieldTheory/PolynomialGaloisGroup.lean |
1 |
2 |
['github-actions', 'tb65536'] |
nobody |
none |
16-73678 16 days ago |
16-79958 16 days ago |
16-79610 16 days |
| 40590 |
BryceT233 author:BryceT233 |
feat(RingTheory/AdjoinRoot): more on `AdjoinRoot' of monic polynomials |
This PR adds some missing basic API for `AdjoinRoot p` where `p` is a monic polynomial.
---
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|
t-ring-theory |
27/0 |
Mathlib/RingTheory/AdjoinRoot.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
16-53160 16 days ago |
16-54184 16 days ago |
28-37334 28 days |
| 41065 |
BryceT233 author:BryceT233 |
feat(Algebra/GroupWithZero/Associated): transfer `IsRelPrime` between associated elements |
This is a split of #41064 which adds lemmas transfering `IsRelPrime` property via associated elements.
---
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|
t-algebra label:t-algebra$ |
18/0 |
Mathlib/Algebra/GroupWithZero/Associated.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
16-36240 16 days ago |
16-38482 16 days ago |
16-38132 16 days |
| 40431 |
sgouezel author:sgouezel |
chore: fix non-reducible diamond in C^* algebras |
The following fails before the PR, succeeds after it
```
example : ((instCStarAlgebraSubtypeMemStarSubalgebraComplexElemental
x).toAlgebra : Algebra ℂ ↥(StarAlgebra.elemental ℂ x)) =
(StarAlgebra.elemental ℂ x).algebra := by
with_reducible_and_instances rfl
```
---
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|
t-algebra
tech debt
label:t-algebra$ |
1/0 |
Mathlib/Algebra/Ring/Subsemiring/Basic.lean |
1 |
10 |
['eric-wieser', 'github-actions', 'grunweg', 'leanprover-radar', 'mathlib-bors', 'sgouezel', 'themathqueen'] |
nobody |
none |
16-25711 16 days ago |
32-80679 32 days ago |
32-80360 32 days |
| 41074 |
vlad902 author:vlad902 |
feat(RingTheory): a ring is nontrivial iff it has nontrivial Krull dimension |
---
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|
t-ring-theory |
15/4 |
Mathlib/Data/ENat/Basic.lean,Mathlib/RingTheory/KrullDimension/Basic.lean |
2 |
1 |
['github-actions'] |
nobody |
none |
16-21860 16 days ago |
16-23768 16 days ago |
16-23418 16 days |
| 41073 |
vlad902 author:vlad902 |
feat(RingTheory): characterizing lemma for rings of infinite Krull dimension |
Show that the Krull dimension of a ring R is infinite if and only if it has ideals of unbounded height.
---
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|
t-ring-theory |
21/0 |
Mathlib/Data/ENat/Basic.lean,Mathlib/RingTheory/Ideal/Height.lean |
2 |
1 |
['github-actions'] |
nobody |
none |
16-21724 16 days ago |
16-24018 16 days ago |
16-24596 16 days |
| 39139 |
or4nge19 author:or4nge19 |
feat(LinearAlgebra): Schur triangulation |
Adds Schur triangulation API for algebraically closed `RCLike`, proved by triangularizing an endomorphism, aiming at a more mathlib idiomatic approach than the original one in #20730 as it now (better) specializes the existing triangularization API and generalizes supporting lemmas in more natural places. A prerequisite for porting `Matrix.det_exp` proof from physlib.
It also proves half of existing TODO in Eigenspace.Triangularizable. It may need a split into 2 PRs and coordination with #37006 .
See [this](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Contribute.20Schur.20decomposition/with/532385359) and [this](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/.28Matrix.20and.20NormedSpace.2Eexp.29.20.7C.20det.20.28exp.20A.29.20.3D.20exp.20.28trace.20A.29/with/581264603) zulip discussions.
Co-authored-by: [kuotsanhsu](https://github.com/kuotsanhsu) <learningstud@gmail.com>
---
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|
large-import |
687/75 |
Mathlib.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Analysis/InnerProductSpace/Triangularizable.lean,Mathlib/LinearAlgebra/Basis/Fin.lean,Mathlib/LinearAlgebra/Basis/Flag.lean,Mathlib/LinearAlgebra/Eigenspace/Basic.lean,Mathlib/LinearAlgebra/Eigenspace/Triangularizable.lean,Mathlib/LinearAlgebra/Matrix/Block.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Basic.lean,Mathlib/LinearAlgebra/Matrix/SchurTriangulation.lean |
10 |
6 |
['dagurtomas', 'github-actions', 'or4nge19', 'themathqueen', 'wwylele'] |
nobody |
none |
16-4132 16 days ago |
16-4132 16 days ago |
25-37045 25 days |
| 40967 |
Formalistic03 author:Formalistic03 |
feat(Combinatorics/SimpleGraph/Paths): some lemmas about inducing walks |
Could also be done via `SimpleGraph.Walk.map_induce`, but I thought that doing it directly is not much worse.
---
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|
new-contributor
t-combinatorics
|
48/0 |
Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Maps.lean,Mathlib/Data/List/Nodup.lean |
3 |
2 |
['github-actions'] |
nobody |
none |
15-48263 15 days ago |
18-84489 18 days ago |
18-84224 18 days |
| 41066 |
BryceT233 author:BryceT233 |
feat(RingTheory/Jacobson/Ideal): surjective `RingHom` and `IsLocalHom` |
This is a split of #41064 which shows that a surjective `RingHom` is a local homomorphism if and only if its kernel is contained in the jacobson radical of the ring.
---
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|
t-ring-theory |
24/16 |
Mathlib/RingTheory/Henselian.lean,Mathlib/RingTheory/Jacobson/Ideal.lean |
2 |
2 |
['BryceT233', 'github-actions'] |
nobody |
none |
15-40166 15 days ago |
15-41107 15 days ago |
16-37050 16 days |
| 38841 |
SnirBroshi author:SnirBroshi |
feat(Mathlib/Order/SuccPred/Limit): more `WithTop` lemmas about `IsMin`/`CovBy`/`IsSuccLimit` |
---
Continues the work from #38244
We should probably also have such lemmas for `WithTopBot`/`WithBotTop`, but that's for another day
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|
t-order |
122/31 |
Mathlib/Order/Cover.lean,Mathlib/Order/SuccPred/Limit.lean,Mathlib/Order/WithBot.lean |
3 |
4 |
['SnirBroshi', 'github-actions', 'vihdzp'] |
nobody |
none |
15-15394 15 days ago |
39-83091 39 days ago |
71-33759 71 days |
| 39747 |
vihdzp author:vihdzp |
feat: intervals `Ici`/`Ioi` are cofinal/closed under directed suprema |
---
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|
t-order |
67/11 |
Mathlib/Order/Cofinal.lean,Mathlib/Order/DirSupClosed.lean,Mathlib/Order/Interval/Set/Basic.lean,Mathlib/Order/UpperLower/Basic.lean,Mathlib/Topology/Order/ScottTopology.lean |
5 |
16 |
['YaelDillies', 'b-mehta', 'github-actions', 'vihdzp'] |
nobody |
none |
15-15151 15 days ago |
49-11692 49 days ago |
49-75712 49 days |
| 39783 |
SnirBroshi author:SnirBroshi |
feat(Order/Interval/Finset): `Set.ncard` lemmas for `LocallyFiniteOrder` |
Followup to #39414 which untagged `Fintype.card_I??` as `@[simp]`.
Adds `Cardinal.mk`/`Set.encard`/`Set.ncard` lemmas for the 8 interval sets `Set.I??` (= 24 lemmas),
that convert them to `Finset.card` over the corresponding `Finset.I??` from a `LocallyFiniteOrder` instance.
---
`simp`? I think it's a bit strange since the `LocallyFiniteOrder` instance could have crazy definitions for the finset intervals which aren't "simpler", though the instances we currently have are simple.
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|
t-order |
115/0 |
Mathlib.lean,Mathlib/Order/Interval/Finset/Card.lean |
2 |
1 |
['github-actions'] |
nobody |
none |
15-15081 15 days ago |
49-7590 49 days ago |
49-7539 49 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
|
529/502 |
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 |
10 |
['AlexeyMilovanov', 'dagurtomas', 'github-actions', 'j-loreaux', 'mathlib-bors', 'mathlib-merge-conflicts'] |
nobody |
none |
15-15036 15 days ago |
36-71028 36 days ago |
56-15772 56 days |
| 38855 |
SnirBroshi author:SnirBroshi |
feat(Order/ConditionallyCompleteLattice/Indexed): `≤` version of `ciSup_or'` for `ConditionallyCompleteLattice` |
Deprime `ciSup_or'` because there's no `ciSup_or`, and add a `≤` version (and dual) for `ConditionallyCompleteLattice`.
Only `≤` because equality does not hold when `p ≠ q` without `sSup ∅ = ⊥`.
---
`ciSup_or'` can't have a dual because there's no dual to `ConditionallyCompleteLinearOrderBot`.
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[](https://gitpod.io/from-referrer/)
|
t-order |
8/1 |
Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
15-14924 15 days ago |
70-58619 70 days ago |
70-58269 70 days |
| 39626 |
justus-springer author:justus-springer |
feat(RingTheory/MvPowerSeries): partial derivatives of `MvPowerSeries` |
Previously, we had formal derivatives for `PowerSeries` and `Polynomial` and formal partial derivatives for `MvPolynomial`, but no formal partial derivatives for `MvPowerSeries`. This PR adds them. Furthermore, `PowerSeries.derivative` is refactored to be defined in terms of `MvPowerSeries.pderiv`, which reduces code duplication (In particular, there is no need to define the bare function `PowerSeries.derivativeFun` anymore).
Most proofs are direct generalizations from the univariate case. I only had to add a few missing API lemmas, which I am PR'ing separately below:
- [x] depends on: #39623
- [x] depends on: #39624
- [x] depends on: #39625
---
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|
t-ring-theory |
320/132 |
Mathlib.lean,Mathlib/RingTheory/MvPowerSeries/Derivative.lean,Mathlib/RingTheory/PowerSeries/Derivative.lean,Mathlib/RingTheory/PowerSeries/Exp.lean |
4 |
3 |
['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
none |
15-13973 15 days ago |
15-14020 15 days ago |
15-14756 15 days |
| 40561 |
iosephusferrum author:iosephusferrum |
feat(ModelTheory): quantifier elimination for first-order theories |
This PR introduces `HasQuantifierElimination` for first-order languages, along with some standard criteria to establish it for any language that satisfies them and prerequisite formalization `mathlib4` required on elementary extension pairs (`IsElementaryExtensionPair`) and < κ-generated substructures (`CardinalLTGenerated`). It also states and proves that the first-order theory DLO (dense linear order without endpoints) has quantifier elimination (`dlo_hasQuantifierElimination`), using the newly formalized quantifier elimination criteria.
Co-authored-by: Yağız Kaan Aydoğdu <y.kaan.aydogdu@gmail.com>
Co-authored-by: Salih Erdem Koçak <saliherdemkd@gmail.com>
Advised-by: Ayhan Günaydın <ayhan.gunaydin@bogazici.edu.tr>
Advised-by: Metin Ersin Arıcan <metin.arican@bogazici.edu.tr>
---
[](https://gitpod.io/from-referrer/)
Please note that we have utilized agentic AI tools (Claude Opus, ChatGPT Codex) during the development of this PR. Most of the proofs of the major theorems are directly "translated" from human-language source material (check the diff in `references.bib`) to Lean proofs using mentioned AI tools. However, all design/formalization decisions are made by us. |
new-contributor
LLM-generated
|
976/7 |
Mathlib.lean,Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/ElementaryExtensionPair.lean,Mathlib/ModelTheory/FinitelyGenerated.lean,Mathlib/ModelTheory/Order.lean,Mathlib/ModelTheory/PartialEquiv.lean,Mathlib/ModelTheory/QuantifierElimination.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Substructures.lean,Mathlib/Tactic/Linter/TextBased/UnicodeLinter.lean,docs/references.bib |
11 |
6 |
['erdkocak', 'felixpernegger', 'github-actions'] |
nobody |
none |
14-72391 14 days ago |
29-75001 29 days ago |
29-74937 29 days |
| 40950 |
bwangpj author:bwangpj |
feat(LinearAlgebra): add Yang-Baxter equation and braided vector spaces |
Define braided vector spaces and the Yang–Baxter equation. |
t-algebra label:t-algebra$ |
121/0 |
Mathlib.lean,Mathlib/LinearAlgebra/TensorProduct/YangBaxter.lean |
2 |
3 |
['github-actions', 'themathqueen'] |
nobody |
none |
14-63134 14 days ago |
19-16982 19 days ago |
19-16632 19 days |
| 41104 |
mbkybky author:mbkybky |
feat(Algebra/Module/Submodule/Pointwise): `u • N = N` if `u` is a unit |
---
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|
t-algebra label:t-algebra$ |
10/6 |
Mathlib/Algebra/Module/Submodule/Pointwise.lean |
1 |
2 |
['eric-wieser', 'github-actions'] |
nobody |
none |
14-54074 14 days ago |
15-15553 15 days ago |
15-15203 15 days |
| 41134 |
martinwintermath author:martinwintermath |
feat(Algebra/Order/Nonneg): add `Nonneg` for nonnegative subtype |
Currently the nonnegative subtype is denoted `{x : R // 0 ≤ x}` which has a tendency to be used inconsistently and does not print well. This PR introduces
```lean4
/- The subtype of nonnegative elements. -/
abbrev Nonneg (α : Type*) [Zero α] [LE α] := { x : α // 0 ≤ x }
```
and replaces `{x : R // 0 ≤ x}` by `Nonneg R` throughout mathlib.
---
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[](https://gitpod.io/from-referrer/)
|
|
114/110 |
Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/Module/Defs.lean,Mathlib/Algebra/Order/Nonneg/Basic.lean,Mathlib/Algebra/Order/Nonneg/Field.lean,Mathlib/Algebra/Order/Nonneg/Floor.lean,Mathlib/Algebra/Order/Nonneg/Module.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Analysis/Convex/Cone/Basic.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Geometry/Convex/Cone/Dual.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/Topology/Algebra/Field.lean,Mathlib/Topology/Algebra/Order/Module.lean |
17 |
3 |
['SnirBroshi', 'github-actions', 'martinwintermath'] |
nobody |
none |
13-68959 13 days ago |
13-71370 13 days ago |
13-73256 13 days |
| 33126 |
CoolRmal author:CoolRmal |
feat: function composition preserves boundedness |
This PR adds the following theorem: if the range of a function `g` is bounded above, then `g ∘ f` is bounded above for
all functions `f`.
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[](https://gitpod.io/from-referrer/)
|
t-order |
19/5 |
Mathlib/Algebra/Order/Group/Pointwise/Bounds.lean,Mathlib/Algebra/Order/GroupWithZero/Bounds.lean,Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/Bounds/Image.lean |
4 |
5 |
['CoolRmal', 'b-mehta', 'github-actions', 'mathlib4-merge-conflict-bot'] |
nobody |
none |
13-63068 13 days ago |
35-1559 35 days ago |
62-10386 62 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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[](https://gitpod.io/from-referrer/)
|
t-combinatorics
new-contributor
|
199/0 |
Mathlib.lean,Mathlib/Combinatorics/SetFamily/DualVC.lean,docs/references.bib |
3 |
42 |
['Shreyas4991', 'YaelDillies', 'Zetetic-Dhruv', 'github-actions'] |
nobody |
1 |
13-63065 13 days ago |
63-75711 63 days ago |
80-36010 80 days |
| 41137 |
plp127 author:plp127 |
fix: include `[NPow F]` in `FunLike.monoidWithZero` |
Include a `NPow` assumption in `FunLike.monoidWithZero` and `FunLike.semiring` and `FunLike.ring` instead of using `npowRec`. See https://github.com/leanprover-community/mathlib4/pull/37779#discussion_r3399574849.
---
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[](https://gitpod.io/from-referrer/)
|
t-data |
18/8 |
Mathlib/Data/FunLike/Ring.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/Basic.lean |
2 |
1 |
['github-actions'] |
nobody |
none |
13-55772 13 days ago |
13-57262 13 days ago |
13-56993 13 days |
| 41138 |
b-mehta author:b-mehta |
feat(RingTheory/PowerSeries/Derivative): add coeff_iterate_derivative |
A simple lemma about iterating the derivative
---
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[](https://gitpod.io/from-referrer/)
|
t-ring-theory |
17/0 |
Mathlib/RingTheory/PowerSeries/Derivative.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
13-52577 13 days ago |
13-53161 13 days ago |
13-52811 13 days |
| 41101 |
YaelDillies author:YaelDillies |
feat(Data/{ENat,ENNReal,EReal}): missing coercion lemmas |
From MeanFourier
---
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[](https://gitpod.io/from-referrer/)
|
t-data |
32/0 |
Mathlib/Data/ENat/Basic.lean,Mathlib/Data/EReal/Basic.lean,Mathlib/Data/Real/ENatENNReal.lean |
3 |
8 |
['YaelDillies', 'eric-wieser', 'github-actions'] |
nobody |
none |
13-43407 13 days ago |
14-31809 14 days ago |
15-19695 15 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 |
45/20 |
Mathlib/Combinatorics/SimpleGraph/Extremal/Turan.lean |
1 |
6 |
['Parcly-Taxel', 'github-actions', 'mathlib-merge-conflicts', 'tb65536'] |
nobody |
none |
13-32728 13 days ago |
35-17654 35 days ago |
81-34689 81 days |
| 39583 |
WilliamCoram author:WilliamCoram |
refactor: change definition of restricted power series to align with restricted multivariate power series |
Previously, restricted power series were defined in terms of a `tendsto atTop` this has been changed to be an abbrev of `MvPowerSeries.IsRestricted` with `isRestricted_iff` lemmas to convert to nicer usable definitions.
---
- [x] depends on: #32692
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t-ring-theory |
71/138 |
Mathlib/RingTheory/PowerSeries/Restricted.lean |
1 |
4 |
['github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
none |
13-28427 13 days ago |
13-29678 13 days ago |
13-31484 13 days |
| 41110 |
felixpernegger author:felixpernegger |
chore: remove remaining `warning.simp.varHead` exceptions |
These are all who remain (tech debt)
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t-category-theory
tech debt
|
25/9 |
Mathlib/CategoryTheory/Sites/Precoverage.lean |
1 |
2 |
['felixpernegger', 'github-actions', 'jkandel1'] |
nobody |
none |
13-15190 13 days ago |
14-82390 14 days ago |
14-82040 14 days |
| 40166 |
felixpernegger author:felixpernegger |
chore: remove all terminal `refine`'s with `exact` |
Found with scripts. This was a pretty exhaustive search and should be almost all of them.
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|
337/351 |
Archive/Imo/Imo1961Q3.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Category/Ring/Limits.lean,Mathlib/Algebra/Category/Ring/Small.lean,Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/Exact/Basic.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/Algebra/Homology/HomologySequence.lean,Mathlib/Algebra/Lie/Abelian.lean,Mathlib/Algebra/Lie/BaseChange.lean,Mathlib/Algebra/Lie/Prod.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/Algebra/Module/Injective.lean,Mathlib/Algebra/Module/LinearMap/FiniteRange.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/LocalizedModule/Submodule.lean,Mathlib/Algebra/Module/Submodule/Lattice.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/MvPolynomial/Division.lean,Mathlib/Algebra/MvPolynomial/Polynomial.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Algebra/Polynomial/UnitTrinomial.lean,Mathlib/Algebra/QuadraticAlgebra/Basic.lean,Mathlib/AlgebraicGeometry/AffineTransitionLimit.lean,Mathlib/AlgebraicGeometry/Cover/Sigma.lean,Mathlib/AlgebraicGeometry/Fiber.lean,Mathlib/AlgebraicGeometry/Geometrically/Integral.lean,Mathlib/AlgebraicGeometry/Gluing.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Subscheme.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/Morphisms/ClosedImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Finite.lean,Mathlib/AlgebraicGeometry/Morphisms/FlatRank.lean,Mathlib/AlgebraicGeometry/Morphisms/Integral.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicGeometry/Morphisms/SurjectiveOnStalks.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/AlgebraicGeometry/Restrict.lean,Mathlib/AlgebraicGeometry/Sites/Small.lean,Mathlib/AlgebraicGeometry/Sites/SmallAffineZariski.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicGeometry/ZariskisMainTheorem.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplices.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Isometric.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Restrict.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Calculus/FDeriv/Pow.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Complex/Periodic.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/LocallyConvex/WeakOperatorTopology.lean,Mathlib/Analysis/LocallyConvex/WeakSpace.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Normed/Affine/AddTorsorBases.lean,Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/Normed/Module/MStructure.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/IntegralRepresentation.lean,Mathlib/Analysis/SpecialFunctions/Elliptic/Weierstrass.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/RootsExtrema.lean,Mathlib/CategoryTheory/Abelian/SerreClass/Localization.lean,Mathlib/CategoryTheory/Adhesive/Basic.lean,Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/CategoryTheory/EquivalenceRelation.lean,Mathlib/CategoryTheory/Extensive.lean,Mathlib/CategoryTheory/FiberedCategory/Fibered.lean,Mathlib/CategoryTheory/Generator/StrongGenerator.lean,Mathlib/CategoryTheory/Limits/Indization/FilteredColimits.lean,Mathlib/CategoryTheory/Limits/IsLimit.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Products.lean,Mathlib/CategoryTheory/Limits/Shapes/CombinedProducts.lean,Mathlib/CategoryTheory/Limits/VanKampen.lean,Mathlib/CategoryTheory/Monoidal/Closed/Ideal.lean,Mathlib/CategoryTheory/ObjectProperty/LimitsClosure.lean,Mathlib/CategoryTheory/ObjectProperty/Retract.lean,Mathlib/CategoryTheory/ObjectProperty/Shift.lean,Mathlib/CategoryTheory/ObjectProperty/Small.lean,Mathlib/CategoryTheory/PathCategory/MorphismProperty.lean,Mathlib/CategoryTheory/Presentable/Directed.lean,Mathlib/CategoryTheory/Presentable/Type.lean,Mathlib/CategoryTheory/Products/Basic.lean,Mathlib/CategoryTheory/Sites/CompatiblePlus.lean,Mathlib/CategoryTheory/Sites/CoverLifting.lean,Mathlib/CategoryTheory/Sites/Coverage.lean,Mathlib/CategoryTheory/Sites/Hypercover/Saturate.lean,Mathlib/CategoryTheory/Sites/Hypercover/ZeroFamily.lean,Mathlib/CategoryTheory/Sites/Point/Conservative.lean,Mathlib/CategoryTheory/Triangulated/Pretriangulated.lean,Mathlib/CategoryTheory/Yoneda.lean,Mathlib/Combinatorics/Additive/FreimanHom.lean,Mathlib/Combinatorics/Matroid/Closure.lean |
258 |
33 |
['dagurtomas', 'felixpernegger', 'github-actions', 'leanprover-radar', 'mathlib-bors', 'mathlib-merge-conflicts', 'plp127'] |
nobody |
none |
12-65181 12 days ago |
12-68252 12 days ago |
32-19272 32 days |
| 40826 |
felixpernegger author:felixpernegger |
feat(ci): autolabel PRs with "Generated with Claude Code" |
When one tells Claude code to open a PR, it will usually end the description with "🤖 Generated with [Claude Code](https://claude.com/claude-code)" (Im sure almost everyone will have seen this at this point).
This PR adds an action that will autolabel PRs with that ending as "LLM-generated", which might save a bit of time.
[List of all such PRs to mathlib](https://github.com/leanprover-community/mathlib4/pulls?q=is%3Apr+%F0%9F%A4%96+Generated+with+Claude+Code+)
(Ironically enough, I made this PR with Codex...)
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|
CI
LLM-generated
|
44/0 |
.github/workflows/label_llm_generated.yml,docs/workflows.md |
2 |
6 |
['SnirBroshi', 'felixpernegger', 'github-actions', 'joneugster'] |
nobody |
none |
12-58983 12 days ago |
22-78539 22 days ago |
22-78534 22 days |
| 41170 |
wwylele author:wwylele |
feat(Analysis): sum of sines and cosines |
Some elementary results that I find convenient to have
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|
t-analysis |
92/0 |
Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Sum.lean |
2 |
2 |
['github-actions'] |
nobody |
none |
12-58817 12 days ago |
12-59946 12 days ago |
12-59771 12 days |
| 40292 |
felixpernegger author:felixpernegger |
chore: replace `by calc` by `calc` whenever possible |
Avoids unnecessarily going into tactic mode, similar to #40223.
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|
212/212 |
Archive/Imo/Imo1981Q3.lean,Archive/Imo/Imo1982Q1.lean,Archive/Imo/Imo1982Q3.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2024Q3.lean,Archive/Imo/Imo2025Q3.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Indicator.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/MvPolynomial/SchwartzZippel.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semifield.lean,Mathlib/Algebra/Order/Ring/Unbundled/Basic.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Algebra/Polynomial/Coeff.lean,Mathlib/Algebra/Ring/Invertible.lean,Mathlib/Analysis/CStarAlgebra/Module/Defs.lean,Mathlib/Analysis/Calculus/BumpFunction/Normed.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Complex/AbelLimit.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Complex/ValueDistribution/FirstMainTheorem.lean,Mathlib/Analysis/Complex/ValueDistribution/Proximity/Basic.lean,Mathlib/Analysis/Convex/Caratheodory.lean,Mathlib/Analysis/Convex/Continuous.lean,Mathlib/Analysis/Convex/Visible.lean,Mathlib/Analysis/Hofer.lean,Mathlib/Analysis/InnerProductSpace/Defs.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/Matrix/Normed.lean,Mathlib/Analysis/Meromorphic/Divisor.lean,Mathlib/Analysis/Normed/Field/Approximation.lean,Mathlib/Analysis/ODE/DiscreteGronwall.lean,Mathlib/Analysis/SpecialFunctions/BinaryEntropy.lean,Mathlib/Analysis/SpecialFunctions/Integrals/LogTrigonometric.lean,Mathlib/Analysis/SpecialFunctions/Integrals/PosLogEqCircleAverage.lean,Mathlib/Analysis/SpecialFunctions/JapaneseBracket.lean,Mathlib/Analysis/SpecialFunctions/Log/Base.lean,Mathlib/Analysis/SpecialFunctions/Log/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Stirling.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/Mate.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Lax.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Oplax.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/Limits/Types/Products.lean,Mathlib/CategoryTheory/Localization/Composition.lean,Mathlib/CategoryTheory/MarkovCategory/Positive.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/Rigid/Basic.lean,Mathlib/Combinatorics/Additive/AP/Three/Behrend.lean,Mathlib/Combinatorics/Additive/Energy.lean,Mathlib/Combinatorics/Additive/ErdosGinzburgZiv.lean,Mathlib/Combinatorics/Additive/SubsetSum.lean,Mathlib/Combinatorics/Additive/VerySmallDoubling.lean,Mathlib/Combinatorics/SetFamily/LYM.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Uniform.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/Removal.lean,Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Computability/AkraBazzi/GrowsPolynomially.lean,Mathlib/Computability/AkraBazzi/SumTransform.lean,Mathlib/Data/Fintype/BigOperators.lean,Mathlib/Data/List/PeriodicityLemma.lean,Mathlib/Data/Nat/Choose/Vandermonde.lean,Mathlib/Data/Nat/Factorial/Basic.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/FieldTheory/Minpoly/IsConjRoot.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/Tensoriality.lean,Mathlib/GroupTheory/SpecificGroups/Quaternion.lean,Mathlib/InformationTheory/KullbackLeibler/Basic.lean,Mathlib/LinearAlgebra/AffineSpace/Matrix.lean,Mathlib/LinearAlgebra/Eigenspace/Basic.lean,Mathlib/LinearAlgebra/Matrix/Determinant/Basic.lean,Mathlib/LinearAlgebra/Matrix/Invertible.lean,Mathlib/LinearAlgebra/RootSystem/RootPositive.lean,Mathlib/MeasureTheory/Constructions/HaarToSphere.lean,Mathlib/MeasureTheory/Covering/Vitali.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Count.lean,Mathlib/MeasureTheory/Integral/Bochner/ContinuousLinearMap.lean,Mathlib/MeasureTheory/Integral/BoundedContinuousFunction.lean,Mathlib/MeasureTheory/Integral/CircleAverage.lean,Mathlib/MeasureTheory/Integral/Gamma.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Integral/MeanValue.lean,Mathlib/MeasureTheory/Measure/AddContent.lean,Mathlib/MeasureTheory/Measure/Count.lean,Mathlib/MeasureTheory/Measure/FiniteMeasure.lean,Mathlib/MeasureTheory/Measure/LevyConvergence.lean,Mathlib/MeasureTheory/Measure/LogLikelihoodRatio.lean,Mathlib/MeasureTheory/Measure/PreVariation.lean,Mathlib/NumberTheory/Chebyshev.lean,Mathlib/NumberTheory/FLT/MasonStothers.lean |
140 |
3 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
none |
12-53643 12 days ago |
12-56694 12 days ago |
29-77589 29 days |
| 41188 |
Scarlett-le author:Scarlett-le |
feat(Geometry/Euclidean): obtuse and right angle criteria from inner product sign |
This PR adds criteria characterising when an unoriented angle is at least, or
strictly greater than, `π / 2`, in terms of the sign of an inner product or a
comparison of squared distances. They are the obtuse/right-angle counterparts of
the existing equality results `InnerProductGeometry.inner_eq_zero_iff_angle_eq_pi_div_two`
and the if-and-only-if Pythagorean theorem
`EuclideanGeometry.dist_sq_eq_dist_sq_add_dist_sq_iff_angle_eq_pi_div_two`.
### New lemmas
`Mathlib/Analysis/SpecialFunctions/Trigonometric/Inverse.lean`
- `Real.pi_div_two_le_arccos : π / 2 ≤ arccos x ↔ x ≤ 0`
- `Real.pi_div_two_lt_arccos : π / 2 < arccos x ↔ x < 0`
Duals of the existing `Real.arccos_le_pi_div_two` / `Real.arccos_lt_pi_div_two`,
both `@[simp]`.
`Mathlib/Geometry/Euclidean/Angle/Unoriented/Basic.lean`
- `InnerProductGeometry.inner_nonpos_iff_pi_div_two_le_angle`
- `InnerProductGeometry.inner_neg_iff_pi_div_two_lt_angle`
`Mathlib/Geometry/Euclidean/Angle/Unoriented/RightAngle.lean`
- `EuclideanGeometry.dist_sq_add_dist_sq_le_dist_sq_iff_pi_div_two_le_angle` |
|
41/0 |
Mathlib/Analysis/SpecialFunctions/Trigonometric/Inverse.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Basic.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/RightAngle.lean |
3 |
1 |
['github-actions'] |
nobody |
none |
12-30197 12 days ago |
12-32043 12 days ago |
12-31693 12 days |
| 41206 |
Ljon4ik4 author:Ljon4ik4 |
feat: strict Lie-Rinehart ideals and Quotients by them |
In this PR strict ideals in the context of Lie-Rinehart algebras are defined and it is shown that quotients by them are again Lie-Rinehart algebras.
## Context on Lie-Rinehart algebras
A Lie-Rinehart algebra is given by a couple of an `R`-algebra `A` and an `R`-Lie-Algebra `L` acting on each other and satisfying certain compatibility conditions. The most important example of Lie-Rinehart algebras in geometry is given by `A`=smooth functions on a smooth manifold, and `L`= vector fields on the manifold. Many important geometric constructions (differential forms, Cartan calculus) are defined naturally in terms of Lie-Rinehart algebras.
## Relevance of the construction
This construction of quotients by ideals will be important to define the Basechange of Lie-Rineahart algebras, which in turn is necessary to define 'comorphisms'. Comorphisms are the right notion of morphism to do geometry (e.g. a smooth map between two manifolds corresponds to a comorphism of their associated Lie-Rinehart algebras).
## Strictness
The ideals here are called strict, because it is assumed that `A` remains untouched and one only considers a subobject of `L`. There seems to be constructions for non-strict ideals, but the definitions are more complicated:
https://www.uni-math.gwdg.de/mjotz/JotzLean18c.pdf
https://arxiv.org/pdf/1706.07084
## Changes made
The files `StrictIdeal.lean` and `Quotient.lean` are new, containing the definition of the ideals and the fact that quotients are again Lie-Rinehart algebras. The `Subalgebra.lean` was mildly changed, since it seemed strange to have `comap` and `ker` without having `map` and `range`.
## Disclosure of AI use
All code is hand-written, I used claude interpret debug messages and search for lemmas.
I think most notably the following patterns were proposed by claude:
* `mul_smul := by rintro r₁ r₂ ⟨x⟩; exact congrArg mk (mul_smul r₁ r₂ x)` to show that things are well-defined on the quotient.
* `change f.toLinearMap' ⁅x, y⁆ ∈ s₂` in the proof in `comap`. (I had a simp there, which had as a result `f.toLinearMap' ⁅x, y⁆ ∈ s₂`, but somehow the subsequent steps did not work then)
## Questions open
* I am not sure if strict is a good prefix, and am happy to change it to something else.
(Also, one could even argue that the subalgebras, as defined currently, should be called strict, too...)
* In the definition of `mk'` the `toFun` field seems obsolete to me, but somehow if I remove it I get an error in one of the lemmas after it.
* I am not sure I fully understand the 'per-definition' expose rules. When I first committed I got some errors so I made two defs exposed, but I am not sure that is the correct way to go.
---
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|
t-algebra label:t-algebra$ |
441/0 |
Mathlib.lean,Mathlib/Algebra/LieRinehartAlgebra/Quotient.lean,Mathlib/Algebra/LieRinehartAlgebra/StrictIdeal.lean,Mathlib/Algebra/LieRinehartAlgebra/Subalgebra.lean |
4 |
1 |
['github-actions'] |
nobody |
none |
12-6260 12 days ago |
12-6787 12 days ago |
12-7093 12 days |
| 36167 |
WenrongZou author:WenrongZou |
feat(RingTheory/FormalGroup): construction of additive inverse of formal group |
construction of additive inverse
---
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|
t-ring-theory |
300/6 |
Mathlib.lean,Mathlib/RingTheory/FormalGroup/AddInv.lean,Mathlib/RingTheory/MvPowerSeries/Substitution.lean,Mathlib/RingTheory/PowerSeries/Substitution.lean,Mathlib/RingTheory/PowerSeries/Trunc.lean |
5 |
5 |
['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
none |
12-2318 12 days ago |
12-28446 12 days ago |
16-52352 16 days |
| 41190 |
joelriou author:joelriou |
feat(CategoryTheory/Presentable): functors which preserve κ-presentable objects |
---
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|
t-category-theory |
62/1 |
Mathlib.lean,Mathlib/CategoryTheory/Presentable/Basic.lean,Mathlib/CategoryTheory/Presentable/PreservesCardinalPresentable.lean |
3 |
3 |
['github-actions', 'smorel394'] |
nobody |
none |
11-86225 11 days ago |
12-31422 12 days ago |
12-31072 12 days |
| 41184 |
joelriou author:joelriou |
feat(CategoryTheory/Presentable): more basic API for κ-filtered categories |
---
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|
t-category-theory |
23/0 |
Mathlib/CategoryTheory/Presentable/IsCardinalFiltered.lean |
1 |
5 |
['github-actions', 'joelriou', 'smorel394'] |
nobody |
none |
11-84568 11 days ago |
12-33188 12 days ago |
12-32838 12 days |
| 41217 |
Probablism author:Probablism |
feat(SimpleGraph/Matching): add graph-level IsMatching |
Closes #11911.
This adds a graph-level `SimpleGraph.IsMatching` predicate. It is support-based, so isolated
vertices are allowed: every vertex in the graph support is incident to exactly one edge.
The existing `Subgraph.IsMatching` predicate is unchanged. I added compatibility lemmas relating it
to `M.spanningCoe`, including an iff characterizing the subgraph predicate as graph-level matching
plus `M.support = M.verts`.
Validation:
- `lake env lean Mathlib/Combinatorics/SimpleGraph/Matching.lean`
- `lake build Mathlib.Combinatorics.SimpleGraph.Matching`
- `lake build Mathlib.Combinatorics.SimpleGraph.Hall Mathlib.Combinatorics.SimpleGraph.Tutte Mathlib.Combinatorics.SimpleGraph.UniversalVerts`
- `lake exe lint-style Mathlib/Combinatorics/SimpleGraph/Matching.lean`
- `lake build Mathlib`
- `lake test`
AI assistance: OpenAI Codex assisted with testing and validation.
|
t-combinatorics
new-contributor
|
41/3 |
Mathlib/Combinatorics/SimpleGraph/Matching.lean |
1 |
4 |
['Probablism', 'SnirBroshi', 'github-actions'] |
nobody |
none |
11-65624 11 days ago |
11-66813 11 days ago |
11-66463 11 days |
| 41219 |
SnirBroshi author:SnirBroshi |
chore(SimpleGraph/Acyclic): clean up "acyclic iff at most one path" API |
Followup to [this comment](https://github.com/leanprover-community/mathlib4/pull/40818#issuecomment-4845714600) on #40818
---
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|
t-combinatorics |
25/25 |
Mathlib/Combinatorics/SimpleGraph/Acyclic.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
11-61743 11 days ago |
11-62304 11 days ago |
11-61954 11 days |
| 41165 |
gnahz04 author:gnahz04 |
feat(Analysis/InnerProductSpace): the representer theorem |
Adds the representer theorem (Schölkopf version): infinite dimensional kernel space represented by finite number of data points.
Discussed in #mathlib4 ("RKHS representer theorem").
**AI disclosure.** I used Claude Code (Claude Opus 4.8) to draft and iterate the Lean proof. I work in kernel methods / RKHS, understand the statement and proof, and can justify the design choices to reviewers.
🤖 Generated with [Claude Code](https://claude.com/claude-code) |
t-analysis
new-contributor
LLM-generated
|
41/0 |
Mathlib/Analysis/InnerProductSpace/Reproducing.lean |
1 |
5 |
['felixpernegger', 'github-actions', 'gnahz04'] |
nobody |
none |
11-55799 11 days ago |
12-85028 12 days ago |
12-84678 12 days |
| 38292 |
kim-em author:kim-em |
feat(AlgebraicTopology): universal cover construction |
This PR constructs the universal cover of a path-connected, locally path-connected, semilocally simply connected space `X` as the based-path space modulo endpoint-preserving homotopy, topologised by coinduction from the compact-open based-path space.
Split across five files:
* `Topology/Homotopy/TubeNeighborhood.lean` — class-free machinery: `IsPathHomotopyTrivial`, tube neighborhoods in path space, their openness in the compact-open topology, and the ladder-homotopy pasting argument showing any two paths in a common tube are homotopic.
* `AlgebraicTopology/FundamentalGroupoid/SemilocallySimplyConnected.lean` — `SemilocallySimplyConnectedAt/On/Space`, defined via the classical based condition (trivial `π₁(U, x) → π₁(X, x)`), with the unbased upgrade on locally path-connected spaces, and discreteness of `Path.Homotopic.Quotient`.
* `AlgebraicTopology/FundamentalGroupoid/BasedPath.lean` — the based-path space (with `FunLike`/`ContinuousEval` instances) and the path-component machinery of `endpoint ⁻¹' U`.
* `AlgebraicTopology/FundamentalGroupoid/UniversalCover/Basic.lean` — quotient topology, `proj`, and the sheet decomposition.
* `AlgebraicTopology/FundamentalGroupoid/UniversalCover/Covering.lean` and `Action.lean` — `isCoveringMap`, `pathConnectedSpace`, `simplyConnectedSpace`, the universal lifting property, and the free, properly discontinuous `π₁(X, x₀)`-action making `proj` a quotient covering map.
I want to note this takes a different approach than Hatcher et al, which build the universal cover as the path space, but with a "custom" topology. It is then a theorem (often not proved in textbooks) that with the usual hypotheses this topology coincides with the one coinduced from the compact-open topology. I decided that "the mathlib way" was just to start with the "natural" topology, and not take this shortcut.
🤖 Prepared with Claude Code and Codex.
|
|
2831/35 |
Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/BasedPath.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SemilocallySimplyConnected.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/UniversalCover/Action.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/UniversalCover/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/UniversalCover/Covering.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/Homotopy/Path.lean,Mathlib/Topology/Homotopy/TubeNeighborhood.lean,Mathlib/Topology/Path.lean,Mathlib/Topology/Subpath.lean,Mathlib/Topology/UnitInterval.lean |
14 |
50 |
['github-actions', 'kim-em', 'mathlib-merge-conflicts'] |
nobody |
none |
11-55435 11 days ago |
11-56800 11 days ago |
11-56450 11 days |
| 41223 |
YaelDillies author:YaelDillies |
feat(LInearAlgebra): predicate version of `mem_span_iff_linearCombination` |
This is necessary after #39582.
From Toric
---
There are *many* more lemmas that will need to be similarly duplicated to accommodate #39582. I personally think it is more reasonable to revert #39582.
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|
t-algebra
toric
label:t-algebra$ |
4/0 |
Mathlib/LinearAlgebra/Finsupp/LinearCombination.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
11-44817 11 days ago |
11-46956 11 days ago |
11-46606 11 days |
| 41228 |
joelriou author:joelriou |
feat(Algebra/ModuleCat/Differentials/Presheaf): the presheaf of relative differentials |
Given a functor `F : C ⥤ D`, presheaves of commutative rings `S`, `R` and a morphism `φ : S ⟶ F.op ⋙ R`, we show that derivations relative to `φ` are representable by a presheaf of `R`-modules.
This is obtained by reducing to the case of absolute differentials. The construction shall allow to deduce the presheaf version of the cokernel sequence $$f^\star \Omega_{Y/S} ⟶ \Omega_{X/S} ⟶ \Omega_{X/Y} ⟶ 0$$ when `f : X ⟶ Y` and `g : Y ⟶ S` are morphisms of schemes.
---
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[](https://gitpod.io/from-referrer/)
|
t-algebraic-geometry
t-category-theory
t-algebra
large-import
label:t-algebra$ |
458/21 |
Mathlib/Algebra/Category/ModuleCat/Differentials/Presheaf.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
11-35229 11 days ago |
11-35793 11 days ago |
11-35443 11 days |
| 40768 |
AlexeyMilovanov author:AlexeyMilovanov |
Add a reachability characterization for PFun.fix |
Add a `ReflTransGen` characterization of `PFun.fix` and use it to simplify one Turing machine proof. |
new-contributor |
27/13 |
Mathlib/Computability/TuringMachine/Config.lean,Mathlib/Data/PFun.lean |
2 |
2 |
['github-actions'] |
nobody |
none |
11-20599 11 days ago |
11-20599 11 days ago |
11-20249 11 days |
| 38213 |
WenrongZou author:WenrongZou |
feat(FormalGroup): APIs for formal group homomorphism |
This PR introduces some APIs for homomorphism between formal group laws.
---
- [x] depends on: #38052
- [x] depends on: #37618
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|
t-ring-theory
large-import
|
27/0 |
Mathlib/RingTheory/FormalGroup/Basic.lean,Mathlib/RingTheory/MvPowerSeries/Equiv.lean,Mathlib/RingTheory/MvPowerSeries/Substitution.lean,Mathlib/RingTheory/PowerSeries/Substitution.lean |
4 |
6 |
['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
none |
11-18142 11 days ago |
11-19211 11 days ago |
11-82610 11 days |
| 41243 |
dependabot author:dependabot |
chore(deps): bump GrantBirki/comment from 3.0.0 to 3.0.3 in /.github/workflows in the actions-version-updates group across 1 directory |
Bumps the actions-version-updates group with 1 update in the /.github/workflows directory: [GrantBirki/comment](https://github.com/grantbirki/comment).
Updates `GrantBirki/comment` from 3.0.0 to 3.0.3
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/grantbirki/comment/releases">GrantBirki/comment's releases</a>.</em></p>
<blockquote>
<h2>v3.0.3</h2>
<h2>What's Changed</h2>
<ul>
<li>Add release bundle attestations by <a href="https://github.com/GrantBirki"><code>@GrantBirki</code></a> in <a href="https://redirect.github.com/GrantBirki/comment/pull/48">GrantBirki/comment#48</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a href="https://github.com/GrantBirki/comment/compare/v3...v3.0.3">https://github.com/GrantBirki/comment/compare/v3...v3.0.3</a></p>
<h2>v3.0.2</h2>
<h2>What's Changed</h2>
<ul>
<li>Bump version to v3.0.2 by <a href="https://github.com/GrantBirki"><code>@GrantBirki</code></a> in <a href="https://redirect.github.com/GrantBirki/comment/pull/47">GrantBirki/comment#47</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a href="https://github.com/GrantBirki/comment/compare/v3...v3.0.2">https://github.com/GrantBirki/comment/compare/v3...v3.0.2</a></p>
<h2>v3.0.1</h2>
<h2>What's Changed</h2>
<ul>
<li>Add dependency cooldowns by <a href="https://github.com/GrantBirki"><code>@GrantBirki</code></a> in <a href="https://redirect.github.com/GrantBirki/comment/pull/37">GrantBirki/comment#37</a></li>
<li>Bump actions/upload-artifact from 6.0.0 to 7.0.0 by <a href="https://github.com/dependabot"><code>@dependabot</code></a>[bot] in <a href="https://redirect.github.com/GrantBirki/comment/pull/38">GrantBirki/comment#38</a></li>
<li>Bump actions/upload-artifact from 7.0.0 to 7.0.1 by <a href="https://github.com/dependabot"><code>@dependabot</code></a>[bot] in <a href="https://redirect.github.com/GrantBirki/comment/pull/39">GrantBirki/comment#39</a></li>
<li>Bump esbuild from 0.27.7 to 0.28.1 in the npm_and_yarn group across 1 directory by <a href="https://github.com/dependabot"><code>@dependabot</code></a>[bot] in <a href="https://redirect.github.com/GrantBirki/comment/pull/40">GrantBirki/comment#40</a></li>
<li>Fix template variable documentation by <a href="https://github.com/GrantBirki"><code>@GrantBirki</code></a> in <a href="https://redirect.github.com/GrantBirki/comment/pull/41">GrantBirki/comment#41</a></li>
<li>Reduce npm dependency surface by <a href="https://github.com/GrantBirki"><code>@GrantBirki</code></a> in <a href="https://redirect.github.com/GrantBirki/comment/pull/45">GrantBirki/comment#45</a></li>
<li>Add versioned release automation by <a href="https://github.com/GrantBirki"><code>@GrantBirki</code></a> in <a href="https://redirect.github.com/GrantBirki/comment/pull/46">GrantBirki/comment#46</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a href="https://github.com/GrantBirki/comment/compare/v3...v3.0.1">https://github.com/GrantBirki/comment/compare/v3...v3.0.1</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/GrantBirki/comment/commit/937820f3623fd0e300294bcc64ac7577fc0ad4cc"><code>937820f</code></a> Merge pull request <a href="https://redirect.github.com/grantbirki/comment/issues/48">#48</a> from GrantBirki/add-release-attestations</li>
<li><a href="https://github.com/GrantBirki/comment/commit/56617234d3c8c5bcb92b2ac851cc4925e3034254"><code>5661723</code></a> Bump version to v3.0.3</li>
<li><a href="https://github.com/GrantBirki/comment/commit/245ea8def6a8b8cd42098a154250be7098f4c97f"><code>245ea8d</code></a> Add release bundle attestations</li>
<li><a href="https://github.com/GrantBirki/comment/commit/93a7ff5a297b609ea35b67866cc3459676d2aba1"><code>93a7ff5</code></a> Merge pull request <a href="https://redirect.github.com/grantbirki/comment/issues/47">#47</a> from GrantBirki/bump-v3.0.2</li>
<li><a href="https://github.com/GrantBirki/comment/commit/44e0f6fce3957b6ba32ea1b28c2885c288723f4b"><code>44e0f6f</code></a> Bump version to v3.0.2</li>
<li><a href="https://github.com/GrantBirki/comment/commit/b23dd77391cf0a2538e898a73169eac9c1a6a6ff"><code>b23dd77</code></a> Merge pull request <a href="https://redirect.github.com/grantbirki/comment/issues/46">#46</a> from GrantBirki/versioned-auto-release</li>
<li><a href="https://github.com/GrantBirki/comment/commit/53e38fc3816c5a0ab34974efe7e26772fa504e39"><code>53e38fc</code></a> Make release workflow reruns resumable</li>
<li><a href="https://github.com/GrantBirki/comment/commit/b95b12a9f0e8d416e4dee45b1247c2ffa0d80f6b"><code>b95b12a</code></a> Disable persisted checkout credentials</li>
<li><a href="https://github.com/GrantBirki/comment/commit/a56acd4048fa2bfef519dbbc7b9f91cfceca3818"><code>a56acd4</code></a> Remove release workflow npm cache</li>
<li><a href="https://github.com/GrantBirki/comment/commit/f802ba8fc0cb98597304197afcbb85edd6d438a7"><code>f802ba8</code></a> Rename action version export</li>
<li>Additional commits viewable in <a href="https://github.com/grantbirki/comment/compare/3439715f0cf3b8fc29bf47be0e3226679c06c41a...937820f3623fd0e300294bcc64ac7577fc0ad4cc">compare view</a></li>
</ul>
</details>
<br />
[](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)
Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`.
[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)
---
<details>
<summary>Dependabot commands and options</summary>
<br />
You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it
- `@dependabot show <dependency name> ignore conditions` will show all of the ignore conditions of the specified dependency
- `@dependabot ignore <dependency name> major version` will close this group update PR and stop Dependabot creating any more for the specific dependency's major version (unless you unignore this specific dependency's major version or upgrade to it yourself)
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</details> |
dependencies
github_actions
CI
|
2/2 |
.github/workflows/build_template.yml,.github/workflows/maintainer_merge_wf_run.yml |
2 |
1 |
['github-actions'] |
nobody |
none |
11-15953 11 days ago |
11-16518 11 days ago |
11-16168 11 days |
| 35669 |
SnirBroshi author:SnirBroshi |
feat(Mathlib/Data/Finset/Mex): `sInf sᶜ ≤ s.encard` |
---
It's in a separate file because I couldn't find a sensible place with the required imports, not because "mex" is particularly interesting.
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|
t-order |
59/0 |
Mathlib.lean,Mathlib/Data/Finset/Mex.lean |
2 |
14 |
['SnirBroshi', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] |
nobody |
none |
11-11153 11 days ago |
11-11699 11 days ago |
15-13803 15 days |
| 38432 |
SnirBroshi author:SnirBroshi |
feat(Logic/Relation): `Map r f g ≤ s ↔ r ≤ s.bicompl f g` |
and the dual `s ≤ Relation.Map r f g ↔ s.bicompl f g ≤ r` which requires `f` and `g` to be bijective.
Adds `Galois{Connection/Insertion/Coinsertion}` for the dual.
The theorems are specialized to `onFun` instead of `bicompl` for when `f = g`.
A `GaloisConnection` for the iff in the title requires `f`/`g` to be bijective, but then we can get an `OrderIso` which is stronger (see #38499).
---
<!-- Your PR title will become the first line of the commit message.
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|
t-logic |
126/28 |
Mathlib/Logic/Relation.lean,Mathlib/Order/GaloisConnection/Basic.lean |
2 |
5 |
['SnirBroshi', 'github-actions', 'plp127'] |
nobody |
none |
11-8239 11 days ago |
11-11281 11 days ago |
79-28581 79 days |
| 41226 |
YaelDillies author:YaelDillies |
feat(Analysis/Convex/TotallyBounded): strengthen to an iff |
... and golf the existing proof using the fancy new `grw`.
From MeanFourier
---
<!-- Your PR title will become the first line of the commit message.
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|
t-analysis |
27/29 |
Mathlib/Analysis/Convex/TotallyBounded.lean,Mathlib/Analysis/LocallyConvex/AbsConvex.lean,Mathlib/Topology/Algebra/IsUniformGroup/Basic.lean |
3 |
1 |
['github-actions'] |
nobody |
none |
11-6265 11 days ago |
11-7745 11 days ago |
11-8333 11 days |
| 36698 |
ghseeli author:ghseeli |
feat(Combinatorics/Enumerative): Latin squares |
This PR defines Latin rectangles and Latin squares and proves an extension theorem using Hall's Marriage Theorem.
## Main results
- `group_to_cayley_table`: every finite group `G` yields a `LatinSquare G G`.
- `latin_rectangle_extends_one_row`: a (non-square) `LatinRectangle` extends to a `LatinRectangle`
with one more row. This is an application of **Hall's Marriage Theorem**, `hallMatchingsOn.nonempty`.
- `latin_rectangle_extends_to_latin_square`: a `LatinRectangle` extends to a `LatinSquare`.
This is included in a new file `Combinatorics/Enumerative/LatinSquare.lean`.
---
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[](https://gitpod.io/from-referrer/)
|
new-contributor
t-combinatorics
|
646/0 |
Mathlib.lean,Mathlib/Combinatorics/Enumerative/DoubleCounting.lean,Mathlib/Combinatorics/Enumerative/LatinSquare.lean,Mathlib/Combinatorics/Pigeonhole.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Fintype/Card.lean,docs/references.bib |
7 |
81 |
['SnirBroshi', 'cjrl', 'eric-wieser', 'ghseeli', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vlad902'] |
nobody |
none |
10-64587 10 days ago |
10-67181 10 days ago |
27-78367 27 days |
| 31892 |
jsm28 author:jsm28 |
feat(Geometry/Euclidean/Sphere/PolePolar): poles and polars |
Define poles and polars for spheres in Euclidean affine spaces, and set up some basic API, including in particular La Hire's theorem (`p₁` lies on the polar of `p₂` if and only if `p₂` lies on the polar of `p₁`).
Poles and polars are actually meaningful for any quadric in a projective space over any field, but I think it's reasonable to set up this theory for spheres in the Euclidean context and potentially link it in future to more general projective geometry.
---
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[](https://gitpod.io/from-referrer/)
|
t-euclidean-geometry |
158/0 |
Mathlib.lean,Mathlib/Geometry/Euclidean/Sphere/PolePolar.lean |
2 |
10 |
['Parcly-Taxel', 'github-actions', 'jsm28', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'wwylele'] |
nobody |
2 |
10-60104 10 days ago |
10-60913 10 days ago |
107-925 107 days |
| 41259 |
felixpernegger author:felixpernegger |
chore: remove redudant `nonrec`'s |
Remove all `nonrec` which are just not needed, about 9% of all `nonrec` occurences (tech debt)
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|
62/62 |
Mathlib/Algebra/Colimit/DirectLimit.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/AlgebraicGeometry/Cover/MorphismProperty.lean,Mathlib/AlgebraicGeometry/Morphisms/ClosedImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Descent.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiFinite.lean,Mathlib/AlgebraicGeometry/Sites/SheafQuasiCompact.lean,Mathlib/Analysis/Calculus/Deriv/Comp.lean,Mathlib/Analysis/Calculus/Deriv/Star.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/WithLp.lean,Mathlib/Analysis/Complex/PhragmenLindelof.lean,Mathlib/Analysis/Complex/Trigonometric.lean,Mathlib/Analysis/Normed/Group/Quotient.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Computability/RecursiveIn.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Cycle.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Rel/Cover.lean,Mathlib/Data/Rel/Separated.lean,Mathlib/Geometry/Euclidean/Inversion/Calculus.lean,Mathlib/Geometry/Manifold/ContMDiff/Constructions.lean,Mathlib/Geometry/Manifold/ContMDiff/NormedSpace.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/MeasureTheory/Group/Arithmetic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean,Mathlib/MeasureTheory/Measure/Decomposition/Lebesgue.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/ModelTheory/Ultraproducts.lean,Mathlib/NumberTheory/BernoulliPolynomials.lean,Mathlib/Probability/Density.lean,Mathlib/Probability/Moments/Variance.lean,Mathlib/RingTheory/Flat/Basic.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Polynomial/Resultant/Basic.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/FiberBundle/Basic.lean,Mathlib/Topology/Filter.lean,Mathlib/Topology/Homotopy/Basic.lean,Mathlib/Topology/Instances/ENat.lean,Mathlib/Topology/MetricSpace/MetricSeparated.lean,Mathlib/Topology/MetricSpace/Pseudo/Basic.lean,Mathlib/Topology/Order/LocalExtr.lean |
44 |
3 |
['felixpernegger', 'github-actions', 'leanprover-radar'] |
nobody |
none |
10-59854 10 days ago |
10-66958 10 days ago |
10-66608 10 days |
| 40193 |
BoltonBailey author:BoltonBailey |
chore(1000.yaml): add entries |
This PR adds data on a number of previously missing entries to 1000.yaml that were found during the course of Project Numina's preparation of LeanTriathlon.
These include:
- `comment`s with references to formalized statements of theorems (mostly from the formal-conjectures repo) in cases where they exist, (it seems that, while we can add unproven statements and statements from other repos, we can't really include unproven statements from other repos using the system as it currently exists)
- `comment`s about related definitions to certain theorems in mathlib.
- `url` references to a few complete formalizations in a variety of other repositories.
- `decl` for the preexisting `prime_ideal_of_disjoint_filter_ideal` theorem in Mathlib, which as far as I can tell is just a more general version of the Boolean Prime Ideal theorem.
AI was used in large scale scans to identify these missing entries, but I have done my best to check manually that the statements are correct.
---
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|
|
17/2 |
docs/1000.yaml |
1 |
9 |
['BoltonBailey', 'github-actions', 'mathlib-merge-conflicts', 'wwylele'] |
nobody |
none |
10-56849 10 days ago |
10-57350 10 days ago |
37-69503 37 days |
| 41273 |
SnirBroshi author:SnirBroshi |
feat(Order/ConditionallyCompleteLattice): antitone versions of `sSup (f '' s)` lemmas |
`f (sInf s) = sSup (f '' s)` and `f (sSup s) = sInf (f '' s)` for an antitone function and a finite nonempty set.
Matches the existing monotone lemmas.
---
Followup to #35822
I think the `Basic.lean` lemmas don't hold for `{Mono/Anti}toneOn f s`, but the `Finset.lean` lemmas should, though I haven't done that yet.
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|
t-order |
39/19 |
Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Finset.lean |
2 |
1 |
['github-actions'] |
nobody |
none |
10-53022 10 days ago |
10-55643 10 days ago |
10-55293 10 days |
| 41258 |
ungatz author:ungatz |
feat(Analysis/Fourier/FiniteAbelian): add the Donoho-Stark support uncertainty principle |
This adds the Donoho–Stark support uncertainty inequality for the unitary Fourier transform on a finite abelian group, plus the supporting Fourier-inversion machinery indexed by the Pontryagin dual `AddChar G ℂ`.
The headline:
> **Theorem `AddChar.donoho_stark`.** For nonzero `f : G → ℂ`,
> `Fintype.card G ≤ (support f).ncard * (support (fourierTransform f)).ncard`,
> where `fourierTransform f ψ = |G|^(-1/2) * ∑ g, conj (ψ g) * f g` ranges over `ψ : AddChar G ℂ`.
The proof is the elementary (L¹, L∞) duality argument that any harmonic-analysis textbook gives for the classical `ZMod N` case; no Parseval or Cauchy–Schwarz is needed. The finite-abelian generalisation is folklore (stated in Tao–Vu *Additive Combinatorics* and Terras *Fourier Analysis on Finite Groups*); I did not find it formalised in Mathlib or any other major library.
### Why this belongs in Mathlib
Mathlib already has the supporting infrastructure — character theory of finite abelian groups (`Mathlib.Algebra.Group.AddChar`), character orthogonality and Pontryagin duality (`Mathlib.Analysis.Fourier.FiniteAbelian.{Orthogonality, PontryaginDuality}`). The Donoho–Stark inequality is the canonical application of all three, and its absence is a real gap: I needed it for a downstream operator-uncertainty result (a diagonal-operator `rank * Pauli-support` bound on the finite Heisenberg group reduces to it) and ended up proving it from scratch. Beyond that use, it is a standard tool in compressed sensing on finite abelian groups, additive combinatorics, and discrete signal recovery (the 1989 paper has ~3500 citations).
### What's in this PR
A single new file, `Mathlib/Analysis/Fourier/FiniteAbelian/DonohoStark.lean`:
- `AddChar.fourierTransform` — the unitary (symmetric) Fourier transform indexed by `AddChar G ℂ`;
- `AddChar.fourier_inversion` — the inversion formula;
- `AddChar.norm_fourierTransform_le`, `AddChar.norm_le_sum_norm_fourierTransform` — the two `L∞ ≤ |G|^(-1/2) · L¹` triangle bounds;
- `AddChar.donoho_stark` — the support uncertainty inequality.
Design choices I expect questions on, and my defaults:
- **`ℂ` rather than `RCLike`**: matches the cited literature and the cleanest home of `AddChar.norm_apply`; happy to generalise if preferred.
- **`Set.ncard` for support sizes**: avoids needing `DecidableEq ℂ` in the statement.
- **A new sibling file** of `Orthogonality.lean` / `PontryaginDuality.lean` rather than a subsection: orthogonality is the tool, Donoho–Stark is the application; can inline if preferred.
Deliberately *not* included: the diagonal-operator `rank * Pauli-support ≥ 2^n` corollary from my workspace — the Pauli-word machinery has no natural home in `Analysis/Fourier` yet; happy to factor it into a follow-up if there is interest.
### AI usage disclosure
Per the [AI contribution policy](https://leanprover-community.github.io/contribute/index.html): the original Lean proof was generated by **Aristotle** (Harmonic AI's automated proof system) from a dispatch containing the statement and the (L¹, L∞) proof strategy, as part of my PhD research workspace. I audited the delivery line by line against Donoho–Stark 1989 (the dispatch also produced a kernel-checked counterexample to a tempting wrong variant — replacing rank by the count of distinct eigenvalues — which the 2×2 identity falsifies). The file here is my adaptation to Mathlib conventions and to current master (module system, `Set.ncard` statement, robust cast handling in the inversion proof), with final tactic-level repairs done with the assistance of Claude (Anthropic). I understand and can defend every line without AI assistance. Please add the `LLM-generated` label (I cannot set labels myself).
### Test plan
- [x] `lake build Mathlib.Analysis.Fourier.FiniteAbelian.DonohoStark` clean (0 errors, 0 warnings).
- [x] `#print axioms` on all five declarations: `[propext, Classical.choice, Quot.sound]`.
- [x] `lake exe lint-style` clean; all lines ≤ 100 chars.
- [x] `Mathlib.lean` updated in alphabetical position.
- [x] Imports minimal (`PontryaginDuality` + `RCLike.Basic` only).
### Reference
Donoho, D. L. and Stark, P. B. (1989). *Uncertainty principles and signal recovery.* SIAM Journal on Applied Mathematics, **49**(3): 906–931. https://doi.org/10.1137/0149053
---
|
t-analysis
new-contributor
LLM-generated
|
283/0 |
Mathlib.lean,Mathlib/Analysis/Fourier/FiniteAbelian/DonohoStark.lean |
2 |
4 |
['copilot-pull-request-reviewer', 'felixpernegger', 'github-actions'] |
nobody |
none |
10-41947 10 days ago |
10-69673 10 days ago |
10-69323 10 days |
| 41139 |
Deicyde author:Deicyde |
doc: add wikidata attributes |
This PR adds a batch of 22 `@[wikidata]` attributes.
Claude helped generate the list of crossrefs (by scanning Wikidata + Mathlib). Comments are generated by [crossref-report](https://github.com/jcommelin/mathlib-crossref-report) and Wikilean.
See https://wikilean.jackmccarthy.org/review?pr=41139 for reviewer UI.
---
|
LLM-generated |
41/3 |
Mathlib/Algebra/IsPrimePow.lean,Mathlib/Analysis/Complex/Circle.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Operator/BoundedLinearMaps.lean,Mathlib/Combinatorics/Digraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/LinearAlgebra/BilinearMap.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Basic.lean,Mathlib/LinearAlgebra/Matrix/Symmetric.lean,Mathlib/LinearAlgebra/RootSystem/WeylGroup.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/OuterMeasure/AE.lean,Mathlib/NumberTheory/NumberField/Basic.lean,Mathlib/RingTheory/ClassGroup/Basic.lean,Mathlib/Topology/Connected/Basic.lean,Mathlib/Topology/Defs/Basic.lean |
21 |
29 |
['Deicyde', 'SnirBroshi', 'faenuccio', 'github-actions'] |
nobody |
none |
10-40451 10 days ago |
13-45340 13 days ago |
13-44990 13 days |
| 41187 |
joelriou author:joelriou |
feat(CategoryTheory/Presentable): constructor for `IsCardinalPresentable` |
---
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|
t-category-theory |
28/5 |
Mathlib/CategoryTheory/Presentable/Basic.lean |
1 |
8 |
['github-actions', 'joelriou', 'smorel394'] |
nobody |
none |
10-31061 10 days ago |
11-48082 11 days ago |
12-31683 12 days |
| 41183 |
joelriou author:joelriou |
feat(CategoryTheory/Presentable): new constructor for `IsCardinalFilteredGenerator` |
Instead of `w`-small index categories, one may provide essentially `w`-small categories instead.
---
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|
t-category-theory |
22/3 |
Mathlib/CategoryTheory/Presentable/CardinalFilteredPresentation.lean |
1 |
5 |
['github-actions', 'joelriou', 'smorel394'] |
nobody |
none |
10-31000 10 days ago |
12-33315 12 days ago |
12-32965 12 days |
| 41181 |
joelriou author:joelriou |
feat(CategoryTheory): limits in Comma categories |
Under suitable assumptions, `Comma.fst/snd` jointly reflect (co)limits. These additions allow to simplify the definition `coneOfPreservesIsLimit` and its dual.
---
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|
t-category-theory |
58/30 |
Mathlib/CategoryTheory/Limits/Comma.lean |
1 |
13 |
['github-actions', 'joelriou', 'smorel394'] |
nobody |
none |
10-30870 10 days ago |
12-16060 12 days ago |
12-33124 12 days |
| 41288 |
lua-vr author:lua-vr |
feat(EReal): add_eq_top_iff_eq_top_* |
Adds `add_eq_top_iff_eq_top_{left,right}` and replaces the proofs of the `ne` versions with `.ne`. `add_ne_top_iff_of_ne_bot_of_ne_top` was duplicated, so I deprecated it.
---
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|
t-data |
11/6 |
Mathlib/Data/EReal/Operations.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
10-23545 10 days ago |
10-24940 10 days ago |
10-24590 10 days |
| 41291 |
tb65536 author:tb65536 |
refactor(RingTheory/IntegralClosure/IsIntegral/Basic): use `FaithfulSMul` in `isIntegral_algebraMap_iff` |
Currently `isIntegral_algebraMap_iff` takes an explicit assumption stating that `algebraMap A B` is nonzero, but a `[FaithfulSMul A B]` typeclass is more idiomatic (and can almost always be inferred automatically).
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|
t-ring-theory
t-algebra
label:t-algebra$ |
26/31 |
Mathlib/FieldTheory/IntermediateField/Adjoin/Algebra.lean,Mathlib/NumberTheory/Niven.lean,Mathlib/NumberTheory/NumberField/CMField.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Basic.lean,Mathlib/RingTheory/Adjoin/PowerBasis.lean,Mathlib/RingTheory/IntegralClosure/IntegralRestrict.lean,Mathlib/RingTheory/IntegralClosure/IntegrallyClosed.lean,Mathlib/RingTheory/IntegralClosure/IsIntegral/Basic.lean,Mathlib/RingTheory/IntegralClosure/IsIntegralClosure/Basic.lean,Mathlib/RingTheory/IntegralClosure/IsIntegralClosure/Defs.lean,Mathlib/RingTheory/Invariant/Galois.lean,Mathlib/RingTheory/IsGaloisGroup/Basic.lean,Mathlib/RingTheory/Norm/Transitivity.lean,Mathlib/RingTheory/Trace/Basic.lean,Mathlib/RingTheory/ZariskisMainTheorem.lean |
15 |
1 |
['github-actions'] |
nobody |
none |
10-16884 10 days ago |
10-16983 10 days ago |
10-16635 10 days |
| 41015 |
JovanGerb author:JovanGerb |
chore(CategoryTheory/Functor/EpiMono): use `to_dual` |
This PR uses `to_dual` to translate some declarations about `Epimorphisms` and `Monomorphisms`. Various prerequisites have also been tagged in this PR.
The namespace of some lemmas has been fixed that should have been capitalized.
A few lemmas about `Epimorphisms` didn't have a corresponding `Monomorphisms` version, so they have been added in this PR.
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|
|
139/226 |
Mathlib/CategoryTheory/Adjunction/Basic.lean,Mathlib/CategoryTheory/EpiMono.lean,Mathlib/CategoryTheory/Functor/EpiMono.lean,Mathlib/CategoryTheory/Functor/FullyFaithful.lean,Mathlib/CategoryTheory/LiftingProperties/Adjunction.lean,Mathlib/CategoryTheory/Preadditive/Injective/Basic.lean,Mathlib/CategoryTheory/Preadditive/Projective/Internal.lean,Mathlib/Tactic/Translate/ToDual.lean |
8 |
2 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
none |
10-16105 10 days ago |
10-20568 10 days ago |
17-9935 17 days |
| 41301 |
joelriou author:joelriou |
feat(CategoryTheory): (co)kernels in functor categories/homological complexes |
---
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|
t-category-theory |
97/2 |
Mathlib.lean,Mathlib/Algebra/Homology/HomologicalComplexKernels.lean,Mathlib/CategoryTheory/Limits/FunctorCategory/Shapes/Kernels.lean |
3 |
1 |
['github-actions'] |
nobody |
none |
10-12763 10 days ago |
10-13309 10 days ago |
10-12959 10 days |
| 41299 |
JovanGerb author:JovanGerb |
chore(DomAct): clean up `DomMulAct`/`DomAddAct` instances |
This PR cleans up the `DomMulAct`/`DomAddAct` instances. They are now copies of the `MulOpposite`/`AddOpposite` instances in a more honest way, using `inferInstanceAs`.
---
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[](https://gitpod.io/from-referrer/)
|
t-group-theory
large-import
|
21/16 |
Mathlib/Algebra/Module/Hom.lean,Mathlib/Algebra/Module/LinearMap/Basic.lean,Mathlib/Algebra/Ring/Opposite.lean,Mathlib/GroupTheory/GroupAction/DomAct/Basic.lean |
4 |
1 |
['github-actions'] |
nobody |
none |
10-6324 10 days ago |
10-9413 10 days ago |
10-9338 10 days |
| 25834 |
Rida-Hamadani author:Rida-Hamadani |
feat(SimpleGraph): girth-diameter inequality |
This is a useful inequality that comes up in proofs related to Moore graphs, cages, SRGs, and so on.
Co-authored-by: Malhar A. Patel <142735852+Mal-Pat@users.noreply.github.com>
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- [x] depends on: #26380
- [x] depends on: #25650
- [x] depends on: #26614
- [x] depends on: #33249
- [x] depends on: #33506
[](https://gitpod.io/from-referrer/)
|
t-combinatorics |
19/2 |
Mathlib/Combinatorics/SimpleGraph/Girth.lean |
1 |
6 |
['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] |
nobody |
none |
10-2092 10 days ago |
10-28857 10 days ago |
10-28535 10 days |
| 41297 |
plp127 author:plp127 |
feat: cardinality of `Ultrafilter` |
We prove there are `2 ^ 2 ^ #α` ultrafilters on an infinite type `α`. For completeness, we also provide the cardinality lemma when `α` is finite.
---
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[](https://gitpod.io/from-referrer/)
|
t-order
t-set-theory
|
142/0 |
Mathlib.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Ultrafilter/Basic.lean,Mathlib/Order/Filter/Ultrafilter/Cardinality.lean |
4 |
1 |
['github-actions'] |
nobody |
none |
9-82055 9 days ago |
10-16713 10 days ago |
10-16363 10 days |
| 41241 |
intgrah author:intgrah |
feat(Order/Category): cartesian closed and distributive structure on PartOrd and Preord |
Give `PartOrd` and `Preord` `CartesianMonoidalCategory`, `MonoidalClosed`, and `IsCartesianDistributive` instances.
---
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[](https://gitpod.io/from-referrer/)
|
new-contributor
t-order
|
272/0 |
Mathlib.lean,Mathlib/Order/Category/PartOrd/CartesianClosed.lean,Mathlib/Order/Category/PartOrd/Distributive.lean,Mathlib/Order/Category/Preord/CartesianClosed.lean,Mathlib/Order/Category/Preord/Distributive.lean |
5 |
5 |
['github-actions', 'intgrah'] |
nobody |
none |
9-80422 9 days ago |
11-18600 11 days ago |
11-18250 11 days |
| 41264 |
alreadydone author:alreadydone |
feat(EllipticCurve/Affine/Point): easy instances |
---
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[](https://gitpod.io/from-referrer/)
|
t-algebraic-geometry
t-algebra
easy
label:t-algebra$ |
14/0 |
Mathlib/Algebra/Group/Action/Faithful.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean |
2 |
5 |
['alreadydone', 'github-actions', 'kbuzzard', 'leanprover-radar', 'plp127'] |
nobody |
none |
9-79148 9 days ago |
10-62178 10 days ago |
10-61828 10 days |
| 38612 |
SnirBroshi author:SnirBroshi |
feat(Order/SuccPred/CompleteLinearOrder): `sSup s < x` iff theorems when we know if `x` is a successor pre-limit or not |
Adds the following theorems (along with their duals and indexed versions):
```lean
sSup_lt_iff_of_not_isSuccPrelimit : ¬IsSuccPrelimit x → sSup s < x ↔ ∀ a ∈ s, a < x
le_sSup_iff_of_not_isSuccPrelimit : ¬IsSuccPrelimit x → x ≤ sSup s ↔ ∃ a ∈ s, x ≤ a
Order.IsSuccPrelimit.sSup_lt_iff : IsSuccPrelimit x → sSup s < x ↔ ∃ a < x, ∀ b ∈ s, b < a
Order.IsSuccPrelimit.le_sSup_iff : IsSuccPrelimit x → x ≤ sSup s ↔ ∀ a < x, ∃ b ∈ s, a ≤ b
```
They are similar to these existing theorems, but not the same:
```lean
sSup_lt_iff : sSup s < x ↔ ∃ a < x, ∀ b ∈ s, b ≤ a
le_sSup_iff_forall_lt : x ≤ sSup s ↔ ∀ a < x, ∃ b ∈ s, a < b
```
---
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[](https://gitpod.io/from-referrer/)
|
t-order |
43/0 |
Mathlib/Order/SuccPred/CompleteLinearOrder.lean |
1 |
6 |
['SnirBroshi', 'github-actions', 'vihdzp'] |
nobody |
1 |
9-63051 9 days ago |
40-801 40 days ago |
75-37248 75 days |
| 38587 |
dagurtomas author:dagurtomas |
feat(Tactic/CategoryTheory): concrete category boilerplate |
Adds `mk_concrete_category`, a command for generating the initial boilerplate for concrete categories whose morphisms are given by a bundled function type.
The command creates the wrapper `Hom` type, named category and concrete category instances, `ofHom`, `Hom.hom`, and the basic dsimp lemmas.
It handles parameterized categories such as `ModuleCat`, and has a paired additive/multiplicative form for generating both structures at once (e.g. `MonCat`/`AddMonCat`).
Includes test categories checking the generated declarations.
[](https://gitpod.io/from-referrer/)
|
LLM-generated
t-meta
t-category-theory
|
905/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/MkConcreteCategory.lean,MathlibTest/CategoryTheory/MkConcreteCategory.lean |
4 |
8 |
['dagurtomas', 'eric-wieser', 'github-actions'] |
nobody |
none |
9-63046 9 days ago |
66-52640 66 days ago |
66-53051 66 days |
| 40665 |
Yu-Misaka author:Yu-Misaka |
feat(RepresentationTheory): the character values of a finite group are algebraic integers |
Zulip link: [#Is there code for X? > Integrality of character](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Integrality.20of.20character/with/603655189)
The proof comes from Seed Prover (lean-eval) and was golfed by me.
Co-authored-by: @GanjinZero
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[](https://gitpod.io/from-referrer/)
|
t-algebra
LLM-generated
label:t-algebra$ |
16/3 |
Mathlib/RepresentationTheory/Character.lean |
1 |
14 |
['Yu-Misaka', 'bwangpj', 'copilot-pull-request-reviewer', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'tb65536', 'yuanyi-350'] |
nobody |
none |
9-57900 9 days ago |
9-59014 9 days ago |
25-78658 25 days |
| 40473 |
karlesmarin author:karlesmarin |
feat(LinearAlgebra/Matrix): the Cauchy-Binet formula |
Adds the Cauchy–Binet formula. For `A : Matrix m n R` and `B : Matrix n m R` over a commutative ring, `det (A * B)` is the sum, over the `Fintype.card m`-element subsets `S` of `n`, of the product of the two maximal minors selected by `S`.
Main results:
* `Matrix.det_mul_eq_sum_det_submatrix_mul_prod` — the Leibniz-type expansion of `det (A * B)` over all index functions `g : m → n`.
* `Matrix.det_mul_cauchyBinet` — the Cauchy–Binet formula.
The proof expands over all `g : m → n`, discards the non-injective ones, and groups the rest by image.
|
|
199/0 |
Mathlib.lean,Mathlib/LinearAlgebra/Matrix/Determinant/CauchyBinet.lean |
2 |
5 |
['github-actions', 'karlesmarin', 'mathlib-merge-conflicts', 'wwylele', 'yuanyi-350'] |
nobody |
none |
9-51789 9 days ago |
9-52286 9 days ago |
31-78219 31 days |
| 41146 |
joelriou author:joelriou |
feat(CategoryTheory/Limits): weighted limits commute with (co)limits in the weight variable |
This is an adaptation of code from https://github.com/joelriou/reedy in order to allow uses both for Reedy categories and applications to hypercovers #41125. In particular, the proof of the preservations of limits with respect to the weight variable (which was obtained in https://github.com/joelriou/reedy in the most favourable case) is proven here in a similar manner as in #41125.
Co-authored-by: Yun Liu
- [x] depends on: #41163
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|
t-category-theory |
267/0 |
Mathlib.lean,Mathlib/CategoryTheory/Limits/Weighted/HasWeightedLimit.lean,Mathlib/CategoryTheory/Limits/Weighted/PreservesLimit.lean,Mathlib/CategoryTheory/ObjectProperty/Equivalence.lean |
4 |
3 |
['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
none |
9-37606 9 days ago |
9-76222 9 days ago |
9-78589 9 days |
| 34799 |
vlad902 author:vlad902 |
feat(SimpleGraph): the cycle graph and complete graph are Hamiltonian |
---
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[](https://gitpod.io/from-referrer/) |
t-combinatorics
large-import
|
22/0 |
Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean |
1 |
6 |
['SnirBroshi', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vlad902'] |
nobody |
none |
9-37603 9 days ago |
10-81832 10 days ago |
10-82033 10 days |
| 32282 |
jsm28 author:jsm28 |
feat(Geometry/Euclidean/Angle/Incenter): unoriented angle bisection |
Add lemmas giving unoriented angles involving the incenter and excenters of a triangle as expressions involving dividing angles of the triangle by 2, deduced from oriented bisection lemmas.
---
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- [ ] depends on: #30982
- [ ] depends on: #31205
- [ ] depends on: #32019
- [ ] depends on: #32021
- [ ] depends on: #32259
- [ ] depends on: #32260
- [ ] depends on: #32270
- [ ] depends on: #32273
- [ ] depends on: #32278
[](https://gitpod.io/from-referrer/)
|
t-euclidean-geometry |
92/0 |
Mathlib/Geometry/Euclidean/Angle/Incenter.lean |
1 |
19 |
['felixpernegger', 'github-actions', 'jsm28', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'wwylele'] |
nobody |
1 |
9-28789 9 days ago |
9-29081 9 days ago |
106-82307 106 days |
| 32294 |
jsm28 author:jsm28 |
feat(Geometry/Euclidean/Angle/Incenter): distance from second intersection with circumcircle |
Add the following lemma: given a triangle ABC, suppose an angle bisector from A through the incenter or excenter I meets the circumcircle again at X (including the case of an external bisector at A tangent to the circle, in which case X = A). Then XB = XI (= XC, by applying this lemma again). This is a standard configuration: https://en.wikipedia.org/wiki/Incenter%E2%80%93excenter_lemma
---
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[](https://gitpod.io/from-referrer/)
|
t-euclidean-geometry |
214/0 |
Mathlib/Geometry/Euclidean/Angle/Incenter.lean |
1 |
9 |
['felixpernegger', 'github-actions', 'jsm28', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'peakpoint'] |
nobody |
none |
9-28552 9 days ago |
9-28552 9 days ago |
106-84691 106 days |
| 41317 |
Raph-DG author:Raph-DG |
chore(Function): ext lemma checking points in the support |
In this PR, we add in a variant of ext_iff_mulSupport which checks two functions are equal by checking they are equal at all points of the union of their supports. This was originally part of #38472, but having this lemma modify such a low level file was making it difficult to work on that PR
---
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|
t-algebra label:t-algebra$ |
9/0 |
Mathlib/Algebra/Notation/Support.lean |
1 |
2 |
['github-actions'] |
nobody |
none |
9-28072 9 days ago |
9-30788 9 days ago |
9-30438 9 days |
| 34633 |
mitchell-horner author:mitchell-horner |
feat(Combinatorics/SimpleGraph): define the Zarankiewicz function |
Defines the Zarankiewicz function $z(m, n; s, t)$ in terms of bipartite graphs.
---
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This comes from splitting up #25841 into smaller PRs.
[](https://gitpod.io/from-referrer/)
|
t-combinatorics
maintainer-merge
|
164/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Zarankiewicz.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean |
3 |
30 |
['SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mitchell-horner'] |
nobody |
1 |
9-18177 9 days ago |
28-50646 28 days ago |
107-81004 107 days |
| 28686 |
mitchell-horner author:mitchell-horner |
feat(Combinatorics/SimpleGraph): prove the Erdős-Stone theorem |
Proves the Erdős-Stone theorem:
If `G` has at least `(1 - 1 / r + o(1)) * n ^ 2 / 2` many edges, then `G` contains a copy of a `completeEquipartiteGraph (r + 1) t`.
---
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[](https://gitpod.io/from-referrer/)
|
t-combinatorics
large-import
|
205/1 |
Mathlib/Combinatorics/SimpleGraph/Extremal/ErdosStoneSimonovits.lean |
1 |
8 |
['barni120400', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'mitchell-horner'] |
nobody |
none |
9-16617 9 days ago |
9-17180 9 days ago |
9-25909 9 days |
| 41327 |
SnirBroshi author:SnirBroshi |
feat(Combinatorics/SimpleGraph/Subgraph): `induce` lemmas |
`Subgraph.induce` API for sup / inf / iSup / iInf / inter / iUnion / iInter (union already exists)
---
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|
t-combinatorics |
58/0 |
Mathlib/Combinatorics/SimpleGraph/Subgraph.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
9-10297 9 days ago |
9-11661 9 days ago |
9-11311 9 days |
| 41232 |
joelriou author:joelriou |
feat(CategoryTheory/Presentable): equivalence between the various definitions of sharply smaller regular cardinals |
---
- [x] depends on: #40937
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|
t-category-theory |
367/20 |
Mathlib/CategoryTheory/Comma/CardinalArrow.lean,Mathlib/CategoryTheory/Presentable/Basic.lean,Mathlib/CategoryTheory/Presentable/SharplyLT/Basic.lean |
3 |
15 |
['github-actions', 'joelriou', 'mathlib-dependent-issues', 'smorel394'] |
nobody |
none |
9-8814 9 days ago |
9-18119 9 days ago |
9-17770 9 days |
| 33143 |
wwylele author:wwylele |
feat(PowerSeries): pentagonal number theorem |
The proof is split in two files: `Mathlib/Combinatorics/Enumerative/Ring.lean` for the algebraic part, and `Mathlib/Combinatorics/Enumerative/PowerSeries.lean` for the summability part. In the near future, I also plan to prove the real/complex version that branches off from the algebraic part.
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[](https://gitpod.io/from-referrer/)
|
t-combinatorics
file-removed
maintainer-merge
|
360/7 |
Mathlib.lean,Mathlib/Combinatorics/Enumerative/Pentagonal/Basic.lean,Mathlib/Combinatorics/Enumerative/Pentagonal/PowerSeries.lean,Mathlib/Combinatorics/Enumerative/Pentagonal/Ring.lean,Mathlib/RingTheory/Nilpotent/Basic.lean,docs/1000.yaml |
6 |
110 |
['YaelDillies', 'copilot-pull-request-reviewer', 'github-actions', 'jcommelin', 'mathlib-dependent-issues', 'tb65536', 'themathqueen', 'urkud', 'vihdzp', 'wwylele'] |
nobody |
1 |
9-8399 9 days ago |
9-12620 9 days ago |
181-5133 181 days |
| 41305 |
martinwintermath author:martinwintermath |
feat(Geometry/Convex/ConvexSpace): consistency adjustments for convexity on module and affine space |
This PR makes a few consistency adjustments to improve the use of `ConvexSpace` with modules and affine spaces.
- make `IsModuleConvexSpace.ofModule` into an instance
- deprecate `isModuleConvexSpace_self` since now derived from `IsModuleConvexSpace.ofModule`
- rename `ConvexSpace.ofAddTorsor := AddTorsor.toConvexSpace`
- add class `IsAffineConvexSpace` and instance `IsAffineConvexSpace.ofAddTorsor`
- add instance deriving `IsAffineConvexSpace R V V` from `IsModuleConvexSpace R V`
With this PR, to use the standard convexity on an affine space we do no longer need the (usually too agressiv)
```lean4
attribute [local instance] AddTorsor.toConvexSpace
```
but the more general
```lean4
variable [ConvexSpace R P] [IsAffineConvexSpace R V P]
```
which now works analogously to convexity on modules. See the fixed instance `IsConvexDist` for metric spaces.
Zulip: [#PR reviews > Convexity refactor](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/Convexity.20refactor/with/607934406)
---
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|
t-convex-geometry |
49/16 |
Mathlib/Analysis/Convex/MetricSpace.lean,Mathlib/Geometry/Convex/ConvexSpace/AffineSpace.lean,Mathlib/Geometry/Convex/ConvexSpace/Module.lean |
3 |
1 |
['github-actions'] |
nobody |
none |
9-5616 9 days ago |
9-70827 9 days ago |
9-74881 9 days |
| 41336 |
SnirBroshi author:SnirBroshi |
chore(Combinatorics/SimpleGraph/Girth): golf `egirth_top` using `cycleGraph` |
Golf `egirth_top` (#38529) using `cycleGraph_isContained_iff` (#35255)
Co-authored-by: Vlad Tsyrklevich <vlad@tsyrklevi.ch>
---
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|
t-combinatorics |
6/11 |
Mathlib/Combinatorics/SimpleGraph/Girth.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
8-64624 8 days ago |
8-65144 8 days ago |
8-64794 8 days |
| 38488 |
b-mehta author:b-mehta |
feat(Data/Finset/Card): iterating a function's image on a finite set stabilises |
...and does so in a bounded number of steps (which is why this is Finset-specific).
In a later PR, I'll add this for endofunctions on a fintype, as well as add a Set.Finite version.
---
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[](https://gitpod.io/from-referrer/)
|
t-data |
35/0 |
Mathlib/Data/Finset/Card.lean,Mathlib/Data/Finset/Image.lean |
2 |
17 |
['SnirBroshi', 'b-mehta', 'github-actions'] |
nobody |
none |
8-63095 8 days ago |
48-5265 48 days ago |
78-66708 78 days |
| 41337 |
gotrevor author:gotrevor |
doc(1000-yaml): add Goodstein's theorem and the Kirby–Paris theorem |
Claims two listed-but-unclaimed entries in the 1000+ theorems scoreboard by adding external-formalization pointers (no mathlib declaration; same pattern as Löb's theorem [`Q204884`](https://github.com/leanprover-community/mathlib4/blob/master/docs/1000.yaml#L201), the flypitch continuum-hypothesis independence [`Q208416`](https://github.com/leanprover-community/mathlib4/blob/master/docs/1000.yaml#L216), and Arrow's impossibility theorem [`Q33481`](https://github.com/leanprover-community/mathlib4/blob/master/docs/1000.yaml#L30)).
## Entries
| Wikidata | Theorem | Formalization |
|----------|---------|---------------|
| `Q1149185` | **Goodstein's theorem** — every Goodstein sequence terminates | [`lean-gallery`](https://github.com/gotrevor/lean-gallery/blob/main/LeanGallery/Logic/Goodstein/Statement.lean) (ordinal-descent proof) |
| `Q1149185X` | **Kirby–Paris theorem** — PA does not prove that every Goodstein sequence terminates | [`goodstein-independence`](https://github.com/gotrevor/goodstein-independence/blob/main/src/GoodsteinPA/Statement.lean) |
## Notes
- **`Q1149185X` (Kirby–Paris, 1982)** is built on the [`FormalizedFormalLogic/Foundation`](https://github.com/FormalizedFormalLogic/Foundation) library (the same library that backs the existing Löb's-theorem entry [`Q204884`](https://github.com/leanprover-community/mathlib4/blob/master/docs/1000.yaml#L201)), via the Wainer growth-rate route (`Goodstein` outgrows every PA-provably-total function). The headline `peano_not_proves_goodstein` is sorry-free and `#print axioms`-clean — it rests on exactly `[propext, Classical.choice, Quot.sound]`.
- **`Q1149185`** is Goodstein's theorem proper (the termination statement, provable in ZFC / Lean); mathlib does not currently contain it.
- Both formalizations are by Trevor Morris, developed with AI assistance: Claude Code (Fable 5, Opus), Codex, and Harmonic's Aristotle.
🤖 Generated with [Claude Code](https://claude.com/claude-code) |
new-contributor
LLM-generated
|
6/0 |
docs/1000.yaml |
1 |
4 |
['felixpernegger', 'github-actions'] |
nobody |
none |
8-61311 8 days ago |
8-63566 8 days ago |
8-63216 8 days |
| 41339 |
mkaratarakis author:mkaratarakis |
feat(Tactic/ComputablePolynomial): define SparsePoly, a computable univariate polynomial |
`SparsePoly R` is a computable, kernel-reducible representation of univariate polynomials over a commutative ring `R` with `DecidableEq R`: a list of `(exponent, coefficient)` pairs with strictly decreasing exponents and nonzero coefficients, making the representation canonical. This first part defines the structure, the semantics `toPoly : SparsePoly R → Polynomial R`, and addition.
This is part 1 of a series splitting #41282 into ≤300-line PRs as requested by reviewers. The series builds up to a `CommRing` instance, an `AlgEquiv` with `Polynomial R`, division, and axiom-free reflection tactics (`poly_decide`, `poly_eval`, `poly_dvd`) whose `#print axioms` trust checks land in `MathlibTest/`.
Started by Mario Carneiro at the Hausdorff Institute (June 2024) with design notes and an original Lean prototype by James Davenport (https://github.com/JamesHDavenport/Dagstuhl23401, `verify-irred/VerifyIrred`).
🤖 Generated with [Claude Code](https://claude.com/claude-code)
|
t-meta |
201/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ComputablePolynomial/Basic.lean |
3 |
2 |
['github-actions'] |
nobody |
none |
8-39053 8 days ago |
8-39663 8 days ago |
8-39848 8 days |
| 41347 |
mkaratarakis author:mkaratarakis |
feat(Tactic/ComputablePolynomial): poly_dvd_cert, certificate-based polynomial divisibility |
The `poly_dvd_cert` tactic: prove `p ∣ q` for `Polynomial K` polyrith-style — search the quotient uncertified in compiled `MetaM` (pseudo-division, so the certified identity is division-free), then verify with `ring` and cancel the leading-coefficient unit. Works over any field with concrete or symbolic coefficients, for monic divisors over any commutative ring, and for unit leading coefficients. Axiom-free (the search never enters the proof term).
Independent of the `SparsePoly` series (#41339) — this file uses only `Polynomial` and standard tactics. Split from #41282 per review request.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
|
t-meta |
290/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ComputablePolynomial/DvdCert.lean,MathlibTest/ComputablePolynomial/PolyDvdCert.lean |
4 |
1 |
['github-actions'] |
nobody |
none |
8-38163 8 days ago |
8-39663 8 days ago |
8-39432 8 days |
| 41348 |
mkaratarakis author:mkaratarakis |
feat(Tactic/ComputablePolynomial): define MvDegrees, exponent vectors for multivariate polynomials |
`MvDegrees nvars` is an exponent vector for a monomial in `nvars` variables: an array of per-variable exponents with its cached total degree, with pointwise addition (`AddCommMonoid`) and the `List`/`Array` folding lemmas the computable multivariate polynomial library (`MvSparsePoly`) is built on.
This is part 1 of the multivariate series splitting #41283 into ≤300-line PRs as requested by reviewers. The series builds up to `MvSparsePoly`, its `CommRing`/`Algebra` instances, and the axiom-free tactics `mv_decide` (ring identities of `MvPolynomial`) and `mv_mem` (ideal membership).
Based on the univariate `SparsePoly` (#41339); started by Mario Carneiro at the Hausdorff Institute (June 2024) with design notes and an original Lean prototype by James Davenport (https://github.com/JamesHDavenport/Dagstuhl23401, `verify-irred/VerifyIrred`).
🤖 Generated with [Claude Code](https://claude.com/claude-code)
|
t-meta |
301/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ComputablePolynomial/MvDegrees.lean |
3 |
2 |
['github-actions'] |
nobody |
none |
8-37899 8 days ago |
8-39082 8 days ago |
8-38951 8 days |
| 40953 |
ymonbru author:ymonbru |
feat: the definition of a KSheaf on a T2 Space |
This files adds the definition of a KSheaf on a T2 space with value in an arbitrary category.
One may expect this notion to come from sheaves on a site of compact subset of a topological space but there is no coresponding Grothendieck topology on compact subsets. In particular, this is because one of the axioms is in the form of a colimit and can't be expressed as a limit condition (hence a sheaf condition).
It also adds API that allow to use the axioms in a convenient way.
---
- [ ] depends on: #40737
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|
new-contributor |
133/0 |
Mathlib.lean,Mathlib/Topology/Sheaves/KSheaf.lean |
2 |
9 |
['github-actions', 'joelriou', 'mathlib-dependent-issues', 'ymonbru'] |
nobody |
none |
8-37810 8 days ago |
8-37810 8 days ago |
8-48195 8 days |
| 41358 |
erdkocak author:erdkocak |
doc(ModelTheory): fix partial equivalence theorem reference |
Fix a stale module doc reference in `ModelTheory.PartialEquiv`: the theorem is `equiv_between_cg`, and the conclusion is an isomorphism `M ≃[L] N`.
---
This documentation-only PR was split out from #41111 following review feedback.
Please note that ChatGPT Codex was used to help prepare this documentation-only PR. |
t-logic
new-contributor
|
3/3 |
Mathlib/ModelTheory/PartialEquiv.lean |
1 |
2 |
['github-actions'] |
nobody |
none |
8-32879 8 days ago |
8-33468 8 days ago |
8-33118 8 days |
| 41111 |
erdkocak author:erdkocak |
feat(ModelTheory): add cardinal-generated substructure API |
This is the first PR in a sequence splitting #40561.
It adds a `CardinalLTGenerated` predicate for substructures, basic closure and map lemmas, and the finitely generated specialization.
Co-authored-by: Yağız Kaan Aydoğdu <y.kaan.aydogdu@gmail.com>
Co-authored-by: Yusuf Demir <yusufdemir12610@gmail.com>
Advised-by: Ayhan Günaydın <ayhan.gunaydin@bogazici.edu.tr>
Advised-by: Metin Ersin Arıcan <metin.arican@bogazici.edu.tr>
Please note that we utilized agentic AI tools (Claude Opus, ChatGPT Codex) during the development of this PR. Most of the proofs of the major theorems are direct translations from human-language source material (see the diff in `references.bib`) into Lean proofs using the mentioned AI tools. However, all design and formalization decisions were made by us. |
t-logic
new-contributor
LLM-generated
|
51/0 |
Mathlib/ModelTheory/FinitelyGenerated.lean,Mathlib/ModelTheory/Substructures.lean |
2 |
9 |
['NoahW314', 'erdkocak', 'felixpernegger', 'github-actions'] |
nobody |
none |
8-32024 8 days ago |
8-32831 8 days ago |
14-30170 14 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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[](https://gitpod.io/from-referrer/)
|
maintainer-merge
tech debt
|
30/15 |
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 |
7 |
11 |
['JovanGerb', 'github-actions', 'grunweg', 'leanprover-radar', 'riccardobrasca'] |
nobody |
none |
8-20898 8 days ago |
19-18795 19 days ago |
19-19252 19 days |
| 41100 |
tb65536 author:tb65536 |
refactor(RingTheory/Localization/AtPrime/Basic): replace `IsLiesOverAlgebra` with `IsScalarTower` |
As @erdOne pointed out on #38465, the recently added `IsLiesOverAlgebra` is equivalent to assuming `IsScalarTower`. So I've deprecated `IsLiesOverAlgebra` and switched everything over to `IsScalarTower`.
---
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|
t-ring-theory
t-algebra
label:t-algebra$ |
71/57 |
Mathlib/RingTheory/Flat/Localization.lean,Mathlib/RingTheory/LocalRing/ResidueField/Fiber.lean,Mathlib/RingTheory/LocalRing/ResidueField/Ideal.lean,Mathlib/RingTheory/LocalRing/ResidueField/Instances.lean,Mathlib/RingTheory/LocalRing/ResidueField/Polynomial.lean,Mathlib/RingTheory/Localization/AtPrime/Basic.lean,Mathlib/RingTheory/QuasiFinite/Basic.lean,Mathlib/RingTheory/QuasiFinite/Weakly.lean,Mathlib/RingTheory/RamificationInertia/Inertia.lean,Mathlib/RingTheory/RamificationInertia/Ramification.lean,Mathlib/RingTheory/Unramified/LocalRing.lean,Mathlib/RingTheory/Unramified/LocalStructure.lean,Mathlib/RingTheory/Unramified/Locus.lean |
13 |
8 |
['chrisflav', 'github-actions', 'mathlib-merge-conflicts', 'tb65536'] |
nobody |
none |
8-8393 8 days ago |
8-9316 8 days ago |
15-15489 15 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 |
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 |
6 |
['github-actions', 'smorel394'] |
nobody |
none |
7-79535 7 days ago |
7-80205 7 days ago |
10-71703 10 days |
| 41364 |
SnirBroshi author:SnirBroshi |
chore(SimpleGraph/Clique): tidy `CliqueFree` iff lemmas |
Add `G.CliqueFree n ↔ (completeGraph (Fin n)).Free G` and rename two other iff theorems to fit better.
Since `Free` is not infix it should come before `top` when naming, `cliqueFree_iff` should mention its RHS since it isn't obvious, and `Fintype.card` should be mentioned.
---
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|
t-combinatorics |
18/8 |
Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Turan.lean |
2 |
1 |
['github-actions'] |
nobody |
none |
7-69789 7 days ago |
8-7980 8 days ago |
8-7630 8 days |
| 41373 |
SnirBroshi author:SnirBroshi |
feat(SimpleGraph): some `CliqueFree`/`Free` lemmas |
---
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|
t-combinatorics |
29/0 |
Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/Copy.lean |
2 |
1 |
['github-actions'] |
nobody |
none |
7-69552 7 days ago |
7-70130 7 days ago |
7-69780 7 days |
| 41374 |
SnirBroshi author:SnirBroshi |
chore(SimpleGraph/Girth): namespace `egirth_le_length` under `IsCycle` |
For dot notation and because this is about cycles. This matches the circuit version.
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|
t-combinatorics |
10/6 |
Mathlib/Combinatorics/SimpleGraph/Girth.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
7-69278 7 days ago |
7-69828 7 days ago |
7-69478 7 days |
| 41369 |
tb65536 author:tb65536 |
feat(RingTheory/Localization/Ideal): generalize `IsLocalization.isMaximal_of_isMaximal_disjoint` |
This PR generalizes the existing `IsLocalization.isMaximal_of_isMaximal_disjoint` in `RingTheory/Jacobson/Ring` to arbitrary localizations.
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|
t-ring-theory
t-algebra
label:t-algebra$ |
21/18 |
Mathlib/RingTheory/Jacobson/Ring.lean,Mathlib/RingTheory/KrullDimension/Polynomial.lean,Mathlib/RingTheory/Localization/AtPrime/Basic.lean,Mathlib/RingTheory/Localization/Ideal.lean |
4 |
1 |
['github-actions'] |
nobody |
none |
7-67299 7 days ago |
7-67346 7 days ago |
7-66997 7 days |
| 41378 |
tb65536 author:tb65536 |
chore(RingTheory/QuasiFinite/Basic): extract instance from ramification proof |
This PR extracts an instance from the proof of `Ideal.ramificationIdx_pos`.
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|
t-ring-theory
t-algebra
label:t-algebra$ |
13/7 |
Mathlib/RingTheory/QuasiFinite/Basic.lean,Mathlib/RingTheory/RamificationInertia/Ramification.lean |
2 |
1 |
['github-actions'] |
nobody |
none |
7-61271 7 days ago |
7-61316 7 days ago |
7-60967 7 days |
| 39864 |
8e7 author:8e7 |
feat(Combinatorics/SimpleGraph/Acyclic): helly property on subtrees |
This PR adds several lemmas regarding connected subsets of vertices in trees (subtrees). The main result is the Helly property for subtrees: For a finite set of subtrees, if any pair of subtrees intersect, then there is a common vertex in all subtrees.
This lemma is part of an effort to formalize tree decompositions (see #38334), and will be used in a future PR to prove `G.cliqueNum - 1 <= G.treeWidth`.
AI Usage: The proofs were developed with the help of Claude Code. I vouch for all the code written and understand the content fully.
---
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|
t-combinatorics
new-contributor
LLM-generated
|
114/0 |
Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Subgraph.lean |
2 |
3 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
none |
7-53045 7 days ago |
7-53600 7 days ago |
25-67423 25 days |
| 41380 |
SnirBroshi author:SnirBroshi |
feat(Combinatorics/SimpleGraph/Girth): relate `girth` and `egirth` |
Also add `le_girth` to match `le_egirth`, which is the only `egirth` lemma that's missing a `girth` counterpart.
---
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|
t-combinatorics |
38/4 |
Mathlib/Combinatorics/SimpleGraph/Girth.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
7-52821 7 days ago |
7-53362 7 days ago |
7-53012 7 days |
| 41109 |
Deicyde author:Deicyde |
feat(Geometry/Manifold): add `ModelWithCorners.MfldCat`, the category of `C^n` manifolds on a fixed model |
Adds `ModelWithCorners.MfldCat I n`, the category of `C^n` manifolds modeled on a fixed model with corners `I`, together with its forgetful functor to `TopCat`.
Suggested by @chrisflav. See #38223 and the [Zulip Thread](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2338223.20The.20Category.20of.20C.5En.20Manifolds/with/586321835) for more discussion of why this is necessary.
Boilerplate based on Yaël Dillies's `Mathlib.Algebra.Category.CommBialgCat`. This PR was prepared with assistance from Claude Code. |
t-differential-geometry |
167/0 |
Mathlib.lean,Mathlib/Geometry/Manifold/Category/MfldCat/OfModel.lean |
2 |
2 |
['Deicyde', 'github-actions', 'jkandel1'] |
nobody |
none |
7-39456 7 days ago |
14-82457 14 days ago |
14-82319 14 days |
| 41379 |
tb65536 author:tb65536 |
chore(RingTheory/*): remove domain assumptions by generalizing from torsion free to faithful smul |
This PR removes some `IsDomain` assumptions by generalizing `Module.IsTorsionFree` to `FaithfulSMul`.
(As @SnirBroshi pointed out in the comments, this is not quite a generalization when the top ring is the zero ring, but this never arises in practice).
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[](https://gitpod.io/from-referrer/)
|
t-ring-theory
t-algebra
label:t-algebra$ |
7/7 |
Mathlib/RingTheory/Conductor.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Over.lean |
3 |
3 |
['SnirBroshi', 'github-actions', 'tb65536'] |
nobody |
none |
7-39317 7 days ago |
7-58890 7 days ago |
7-58541 7 days |
| 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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|
t-category-theory
tech debt
|
186/6 |
Mathlib.lean,Mathlib/CategoryTheory/Presentable/Basic.lean,Mathlib/CategoryTheory/Presentable/CardinalPure.lean |
3 |
16 |
['github-actions', 'joelriou', 'smorel394'] |
nobody |
none |
7-20726 7 days ago |
8-22643 8 days ago |
11-76376 11 days |
| 41383 |
joelriou author:joelriou |
feat(Algebra/Category/ModuleCat): the category of sheaves of modules is Grothendieck abelian |
---
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|
t-category-theory |
128/5 |
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 |
1 |
['github-actions'] |
nobody |
none |
7-11189 7 days ago |
7-13743 7 days ago |
7-14064 7 days |
| 40782 |
tb65536 author:tb65536 |
feat(Combinatorics/SimpleGraph/Coloring/EdgeLabeling): add predicates for monochromatic subsets |
This PR adds predicates for monochromatic subsets, in preparation for Ramsey theory.
---
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|
t-combinatorics |
143/0 |
Mathlib/Combinatorics/SimpleGraph/Coloring/EdgeLabeling.lean |
1 |
26 |
['SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'tb65536'] |
nobody |
1 |
7-5860 7 days ago |
7-76790 7 days ago |
20-35280 20 days |
| 41388 |
emlis42 author:emlis42 |
feat(Data/Set): add mono of right inv |
This PR adds some theorems about monotonicity of right inverse of some map.
This is mainly for discoverability and includes a strict version of `monotoneOn_of_rightInvOn_of_mapsTo` i.e `strictMonoOn_of_rightInvOn_of_mapsTo`.
Discussed here: [Lemmas about `StrictMono`/`Monotone` maps with right inverse](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Lemmas.20about.20.60StrictMono.60.2F.60Monotone.60.20maps.20with.20right.20inverse) |
t-data |
36/3 |
Mathlib/Data/Set/Monotone.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
6-85854 6 days ago |
7-1979 7 days ago |
7-1629 7 days |
| 38141 |
Jun2M author:Jun2M |
feat(Order/Partition): the partition induced by a symmetric transitive relation |
We introduce a constructor for Partition from a symmetric, transitive relation, with `copy` function baked into the definition.
Co-authored-by: Peter Nelson <apn.uni@gmail.com>
---
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|
t-order |
43/8 |
Mathlib/Order/Partition/Basic.lean |
1 |
5 |
['SnirBroshi', 'YaelDillies', 'github-actions'] |
nobody |
none |
6-63092 6 days ago |
27-81566 27 days ago |
86-19987 86 days |
| 38821 |
Jun2M author:Jun2M |
feat(Data/List): rotation of sublist is sublist of rotation |
This PR proves `(∃ L₁ : List α, L ~r L₁ ∧ L₁ <+ L') ↔ (∃ L₂ : List α, L <+ L₂ ∧ L₂ ~r L')`.
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|
t-data |
10/0 |
Mathlib/Data/List/Rotate.lean |
1 |
3 |
['SnirBroshi', 'eric-wieser', 'github-actions'] |
nobody |
none |
6-63092 6 days ago |
71-81409 71 days ago |
71-81059 71 days |
| 41300 |
alreadydone author:alreadydone |
feat(EllipticCurve): the universal elliptic curve |
+ Define the universal Weierstrass curve (`Universal.curve`) over the polynomial ring `ℤ[A₁,A₂,A₃,A₄,A₆]`, and the universal pointed elliptic curve (`Universal.pointedCurve`) over the field of fractions (`Universal.Field`) of the universal ring `ℤ[A₁,A₂,A₃,A₄,A₆,X,Y]/⟨P⟩ = Universal.Poly/⟨P⟩` (`Universal.Ring`, where `P` is the Weierstrass polynomial) with distinguished point `(X,Y)`.
+ Given a Weierstrass curve `W` over a commutative ring `R`, we define the specialization homomorphism `W.specialize : ℤ[A₁,A₂,A₃,A₄,A₆] →+* R`. If `(x,y)` is a point on the affine plane, we define `W.polyEval x y : Universal.Poly →+* R`, which factors through `W.ringEval x y : Universal.Ring →+* R` if `(x,y)` is on `W`.
migrated from #13847
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|
t-algebraic-geometry
t-algebra
label:t-algebra$ |
213/0 |
Mathlib.lean,Mathlib/Algebra/Group/Action/Faithful.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Universal.lean |
4 |
9 |
['Multramate', 'alreadydone', 'github-actions'] |
nobody |
none |
6-17012 6 days ago |
9-84351 9 days ago |
10-7196 10 days |
| 38957 |
wwylele author:wwylele |
chore(GroupTheory/DivisibleHull): remove `backward.privateInPublic` |
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tech debt
t-group-theory
|
5/12 |
Mathlib/GroupTheory/DivisibleHull.lean |
1 |
13 |
['Komyyy', 'github-actions', 'grunweg', 'jcommelin', 'wwylele'] |
nobody |
none |
6-16035 6 days ago |
47-61935 47 days ago |
61-53535 61 days |
| 40728 |
Formalistic03 author:Formalistic03 |
feat(Combinatorics/SimpleGraph/Hasse): more properties of Hasse graphs of linear orders |
- two forms of an intermediate value theorem for linear orders
- the Hasse graph of a linear order is acyclic
- a path graph is locally finite
---
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|
new-contributor
t-combinatorics
large-import
|
97/24 |
Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/CycleGraph.lean,Mathlib/Combinatorics/SimpleGraph/Hasse.lean,Mathlib/Data/Fintype/Defs.lean |
4 |
18 |
['Formalistic03', 'SnirBroshi', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
none |
5-81845 5 days ago |
5-84967 5 days ago |
19-64581 19 days |
| 41338 |
kim-em author:kim-em |
refactor(Combinatorics/SimpleGraph/CycleGraph): golf cycleGraph_isContained_iff via getVert |
Reopened from my fork, replacing #41268 (previously a branch on the main repo).
This PR rewrites the reverse direction of `cycleGraph_isContained_iff` from https://github.com/leanprover-community/mathlib4/pull/35255. Building the copy on `Walk.getVert` instead of `support` indexing makes the vertex map total, dispatches both adjacency cases through a single cyclic-successor helper (no `wlog`), handles the wraparound with `adj_penultimate`, and gets injectivity directly from `IsCycle.getVert_injOn'`.
🤖 Prepared with Claude Code |
t-combinatorics
LLM-generated
|
14/20 |
Mathlib/Combinatorics/SimpleGraph/CycleGraph.lean |
1 |
11 |
['SnirBroshi', 'github-actions', 'kim-em', 'vlad902'] |
nobody |
2 |
5-81313 5 days ago |
8-43017 8 days ago |
8-43094 8 days |
| 37683 |
SabrinaJewson author:SabrinaJewson |
feat(Order/OrdContinuous): every map between complete lattices that preserves sSup is a left adjoint of some Galois connection |
It is already proven that the left side of a Galois connection is left-continuous; this provides the converse.
---
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|
new-contributor
t-order
|
14/0 |
Mathlib/Order/OrdContinuous.lean |
1 |
4 |
['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
none |
5-78057 5 days ago |
5-79724 5 days ago |
5-80821 5 days |
| 41428 |
chrisflav author:chrisflav |
feat(Algebra/Category/ModuleCat): submodules of sheaves of modules |
---
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|
t-category-theory
LLM-generated
|
148/0 |
Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Submodule.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Submodule.lean,Mathlib/CategoryTheory/Sites/Whiskering.lean |
4 |
2 |
['chrisflav', 'github-actions'] |
nobody |
none |
5-74057 5 days ago |
5-74784 5 days ago |
5-74472 5 days |
| 41416 |
tb65536 author:tb65536 |
feat(FieldTheory/IntermediateField/Adjoin/Defs): prove `adjoin F (adjoin K S) = adjoin F S` |
This PR adds `adjoin_adjoin_right`, which states that `adjoin F (adjoin K S) = adjoin F S` (compare with `adjoin_adjoin_left` which states that `(adjoin (adjoin F S) T).restrictScalars _ = adjoin F (S ∪ T)`).
This can be used to golf the proof of `adjoin_insert_adjoin`.
I had to move `adjoin_union` earlier in the file (I moved to be with `adjoin_empty` and `adjoin_univ`).
Upstreamed from FLT.
---
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|
t-algebra
FLT
label:t-algebra$ |
13/10 |
Mathlib/FieldTheory/IntermediateField/Adjoin/Defs.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
5-73370 5 days ago |
6-10056 6 days ago |
6-9707 6 days |
| 37603 |
Parcly-Taxel author:Parcly-Taxel |
refactor: review of `SetSemiring` |
* Rename `Set.up` and `SetSemiring.down` to `SetSemiring.ofSet` and `SetSemiring.toSet` respectively. Unprotect both and make them equivalences, following `FreeMonoid`.
* Derive `CompleteAtomicBooleanAlgebra` for `SetSemiring` immediately.
* Add `imageHom_id` and `imageHom_comp`. The three existing lemmas about `imageHom` are coalesced into `imageHom_apply`.
Ultimately inspired by https://github.com/leanprover-community/mathlib4/pull/36934#issuecomment-4183475568. |
t-data |
119/164 |
Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Data/Set/Semiring.lean |
2 |
44 |
['Parcly-Taxel', 'YaelDillies', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'ocfnash', 'sgouezel'] |
nobody |
1 |
5-67790 5 days ago |
5-69846 5 days ago |
33-84819 33 days |
| 41393 |
SnirBroshi author:SnirBroshi |
feat(SimpleGraph/Hamiltonian): a graph is Hamiltonian iff there's a Hamiltonian path with adjacent endpoints |
---
The new public import is needed because `Nat.card` was previously only imported privately.
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|
t-combinatorics |
38/1 |
Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
5-39000 5 days ago |
6-66493 6 days ago |
6-66143 6 days |
| 41198 |
Raph-DG author:Raph-DG |
feat(AlgebraicGeometry): degree of a zero-cycle |
In this PR, we define the degree of a zero-cycle as in https://stacks.math.columbia.edu/tag/0AZ0
---
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|
t-algebraic-geometry
large-import
|
107/2 |
Mathlib/AlgebraicGeometry/AlgebraicCycle/Basic.lean,Mathlib/AlgebraicGeometry/ResidueField.lean,Mathlib/Topology/LocallyFinsupp.lean |
3 |
13 |
['Raph-DG', 'github-actions', 'joelriou'] |
nobody |
none |
5-37041 5 days ago |
5-37644 5 days ago |
8-21575 8 days |
| 41208 |
tb65536 author:tb65536 |
chore(FieldTheory/Galois/IsGaloisGroup): remove FaithfulSMul assumptions |
A few results in IsGaloisGroup.lean are proved by passing to fraction fields which requires assuming FaithfulSMul. This PR removes the FaithfulSMul assumption by first passing to the image subring.
---
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|
t-ring-theory
t-algebra
label:t-algebra$ |
28/29 |
Mathlib/FieldTheory/Galois/IsGaloisGroup.lean,Mathlib/NumberTheory/RamificationInertia/Galois.lean,Mathlib/RingTheory/IsGaloisGroup/Basic.lean |
3 |
1 |
['Whysoserioushah', 'github-actions'] |
nobody |
1 |
5-29126 5 days ago |
11-79296 11 days ago |
11-78947 11 days |
| 41401 |
vlad902 author:vlad902 |
feat(RingTheory): `Ideal.span` corollaries of Krull's height theorem |
Currently we have statements bounding the height of minimal primes of `Ideal.span s`. Add the obvious corollaries to bound the height of `Ideal.span s` directly.
Also add a `Set.encard`-valued statement of Krulls' height theorem for `Ideal.span`s. In a Noetherian ring we know the bound should always be finite, but this is useful in downstream applications that are using ENats.
---
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|
t-ring-theory |
26/1 |
Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
5-28623 5 days ago |
6-34576 6 days ago |
6-34687 6 days |
| 41447 |
SnirBroshi author:SnirBroshi |
chore(Combinatorics/SimpleGraph/Trails): golf and cleanup |
---
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|
t-combinatorics |
45/77 |
Mathlib/Combinatorics/SimpleGraph/Trails.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Basic.lean |
2 |
1 |
['github-actions'] |
nobody |
none |
5-7572 5 days ago |
5-8506 5 days ago |
5-8156 5 days |
| 41449 |
EzequielS2 author:EzequielS2 |
feat(Topology/ContinuousMap): domMulAct action on C(X, Y) |
## Summary
- Define the action of `Mᵈᵐᵃ` on `C(α, β)` when `M` acts continuously on `α`.
- Add `SMul`, `MulAction`, `SMulCommClass`, and `ContinuousSMul` instances.
- Closes #5379.
## Test plan
- [x] `lake build Mathlib.Topology.ContinuousMap.DomAct`
- [x] `lake exe runLinter Mathlib.Topology.ContinuousMap.DomAct`
|
t-topology
new-contributor
|
101/0 |
Mathlib.lean,Mathlib/Topology/ContinuousMap/DomAct.lean |
2 |
3 |
['github-actions'] |
nobody |
none |
5-6804 5 days ago |
5-7509 5 days ago |
5-7159 5 days |
| 41454 |
EzequielS2 author:EzequielS2 |
feat(Topology/ContinuousMap): domMulAct action on bounded continuous maps |
## Summary
- Define the action of `Mᵈᵐᵃ` on bounded continuous functions `α →ᵇ β`.
- Add basic instances and simp lemmas.
## Dependency
Depends on #41449. I will rebase onto `master` after that PR merges.
## Test plan
- [x] `lake build Mathlib.Topology.ContinuousMap.Bounded.DomAct`
- [x] `lake exe runLinter Mathlib.Topology.ContinuousMap.Bounded.DomAct`
|
new-contributor
t-topology
|
184/0 |
Mathlib.lean,Mathlib/Topology/ContinuousMap/Bounded/DomAct.lean,Mathlib/Topology/ContinuousMap/DomAct.lean |
3 |
2 |
['github-actions'] |
nobody |
none |
5-2286 5 days ago |
5-4493 5 days ago |
5-4143 5 days |
| 41450 |
chenson2018 author:chenson2018 |
chore: remove uses of `Subrelation` |
Following up on the description of #40792, this removes additional uses of `Subrelation` now that #30526 has been merged.
---
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|
t-logic |
19/20 |
Mathlib/Logic/Relation.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
5-1520 5 days ago |
5-5310 5 days ago |
5-4960 5 days |
| 41458 |
SnirBroshi author:SnirBroshi |
feat(Data/List/Basic): lists with equal `tail` and `dropLast` are equal |
(except for subsingleton lists), and also lists with equal `head?` and `tail`.
---
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|
t-data |
17/0 |
Mathlib/Data/List/Basic.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
4-85858 4 days ago |
5-2262 5 days ago |
5-1912 5 days |
| 41469 |
SnirBroshi author:SnirBroshi |
feat(SimpleGraph/Coloring/EdgeLabeling): `Unique` & `IsEmpty` instances and simplify `mk` |
---
The changes aren't related, they're just small so I grouped them together.
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[](https://gitpod.io/from-referrer/)
|
t-combinatorics |
8/5 |
Mathlib/Combinatorics/SimpleGraph/Coloring/EdgeLabeling.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
4-78762 4 days ago |
4-80652 4 days ago |
4-80302 4 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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[](https://gitpod.io/from-referrer/)
|
t-algebra
tech debt
label:t-algebra$ |
31/87 |
Mathlib/Algebra/AffineMonoid/Irreducible.lean,Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/Horn.lean,Mathlib/Combinatorics/Enumerative/DyckWord.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Exponential.lean,scripts/nolints_prime_decls.txt |
8 |
1 |
['github-actions'] |
nobody |
none |
4-76991 4 days ago |
4-81442 4 days ago |
5-41 5 days |
| 40548 |
qawbecrdtey author:qawbecrdtey |
chore(FieldTheory): cleanup imports |
---
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Cleaned imports of `Mathlib.FieldTheory`.
[](https://gitpod.io/from-referrer/)
|
t-algebra label:t-algebra$ |
10/72 |
Mathlib/FieldTheory/AbelRuffini.lean,Mathlib/FieldTheory/AbsoluteGaloisGroup.lean,Mathlib/FieldTheory/AlgebraicClosure.lean,Mathlib/FieldTheory/AxGrothendieck.lean,Mathlib/FieldTheory/CardinalEmb.lean,Mathlib/FieldTheory/Cardinality.lean,Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/FieldTheory/Finite/GaloisField.lean,Mathlib/FieldTheory/Finite/Polynomial.lean,Mathlib/FieldTheory/Finiteness.lean,Mathlib/FieldTheory/Fixed.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/Galois/Infinite.lean,Mathlib/FieldTheory/Galois/NormalBasis.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Basic.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/FieldTheory/IsAlgClosed/Basic.lean,Mathlib/FieldTheory/Isaacs.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/FieldTheory/KummerPolynomial.lean,Mathlib/FieldTheory/Laurent.lean,Mathlib/FieldTheory/Minpoly/Field.lean,Mathlib/FieldTheory/Minpoly/IsConjRoot.lean,Mathlib/FieldTheory/Minpoly/IsIntegrallyClosed.lean,Mathlib/FieldTheory/Normal/Closure.lean,Mathlib/FieldTheory/Normal/Defs.lean,Mathlib/FieldTheory/Perfect.lean,Mathlib/FieldTheory/PerfectClosure.lean,Mathlib/FieldTheory/PrimeField.lean,Mathlib/FieldTheory/PrimitiveElement.lean,Mathlib/FieldTheory/PurelyInseparable/AdjoinPthRoots.lean,Mathlib/FieldTheory/PurelyInseparable/PerfectClosure.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/FieldTheory/RatFunc/Basic.lean,Mathlib/FieldTheory/RatFunc/Defs.lean,Mathlib/FieldTheory/RatFunc/Degree.lean,Mathlib/FieldTheory/Separable.lean,Mathlib/FieldTheory/SeparableDegree.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/FieldTheory/SplittingField/Construction.lean |
40 |
7 |
['github-actions', 'leanprover-radar', 'qawbecrdtey', 'yuanyi-350'] |
nobody |
none |
4-67819 4 days ago |
23-28758 23 days ago |
30-17682 30 days |
| 41419 |
teorth author:teorth |
feat(Analysis/SpecialFunctions/Log): positivity extensions for Nat.Primes |
Add `positivity` extensions proving `0 ≠ (p : α)`, `0 < (p : α)`, `0 < Real.log p` for `p : Nat.Primes`. Tests in MathlibTest/positivity.lean. The former works for fields such as `Complex` even without opening `ComplexOrder`.
---
Important notes:
- This code was AI-generated. While I did review it, my expertise in metaprogramming is limited, so the code requires additional review.
- I placed the new extensions in `Analysis/SpecialFunctions/Log`, including the extension for `0 < (p : α)`, even though this one does not involve the logarithm. I am open to suggestions for a better location for this tactic specifically.
- An earlier version also accepted an ambient hypothesis `Nat.prime p` in lieu of the `Nat.Primes` subtype, but this was dropped after review.
[](https://gitpod.io/from-referrer/)
|
t-analysis
LLM-generated
|
56/0 |
Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,MathlibTest/positivity.lean |
2 |
6 |
['github-actions', 'j-loreaux', 'teorth'] |
nobody |
none |
4-66195 4 days ago |
4-72904 4 days ago |
6-2789 6 days |
| 41459 |
EzequielS2 author:EzequielS2 |
feat(Algebra/Group): mulOpposite equivs for submonoid and subgroup |
## Summary
Add MulOpposite monoid equivalences for submonoids and subgroups, and remove the corresponding TODOs in `Subsemiring/MulOpposite.lean`.
## Test plan
- [x] `lake build` and `lake exe runLinter` on `Mathlib.Algebra.Group.Submonoid.MulOpposite` and `Mathlib.Algebra.Group.Subgroup.MulOpposite`
|
t-algebra
new-contributor
label:t-algebra$ |
78/4 |
Mathlib/Algebra/Group/Subgroup/MulOpposite.lean,Mathlib/Algebra/Group/Submonoid/MulOpposite.lean,Mathlib/Algebra/Ring/Subsemiring/MulOpposite.lean |
3 |
9 |
['EzequielS2', 'github-actions', 'wwylele'] |
nobody |
none |
4-63341 4 days ago |
5-1111 5 days ago |
5-761 5 days |
| 41466 |
EzequielS2 author:EzequielS2 |
feat(Algebra/Order): stronger sublist product inequality via diff |
## Summary
Add `Sublist.prod_le_prod'_of_mem_diff` and `Sublist.sum_le_sum_of_mem_diff`.
## Test plan
- [x] `lake build` and `lake exe runLinter` on `Mathlib.Algebra.Order.BigOperators.Group.List`
|
t-algebra
new-contributor
label:t-algebra$ |
13/4 |
Mathlib/Algebra/Order/BigOperators/Group/List.lean |
1 |
6 |
['EzequielS2', 'github-actions', 'wwylele'] |
nobody |
none |
4-62154 4 days ago |
4-81883 4 days ago |
4-81533 4 days |
| 41376 |
teorth author:teorth |
feat(Topology/Algebra/Group/Basic,Algebra/Group/Pointwise/Set/Basic): add Filter.map_{sub,div}{Left,Right}_nhds{,LT,GT,NE} |
The file `Topology/Algebra/Group/Basic` contains various variants of `Filter.map_mulLeft_nhds` and `Filter.map_mulRight_nhds`. The PR adds the analogous lemmas for division, with very similar proofs (which requires adding some helper lemmas to `Algebra/Group/Pointwise/Set/Basic`). Using `to_additive', one also obtains lemmas for subtraction for free,
---
[](https://gitpod.io/from-referrer/)
|
|
73/7 |
Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Topology/Algebra/Group/Basic.lean |
2 |
2 |
['github-actions', 'wwylele'] |
nobody |
none |
4-55630 4 days ago |
7-11009 7 days ago |
7-65315 7 days |
| 41218 |
SnirBroshi author:SnirBroshi |
feat(SimpleGraph/Star): the star graph is the only triangle-free graph with a universal vertex |
- `starGraph r |>.CliqueFree 3`
- `G.IsUniversal v → G.CliqueFree 3 → G = starGraph v`
- `G.IsUniversal v → (G.IsAcyclic ↔ G.CliqueFree 3)`
---
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[](https://gitpod.io/from-referrer/)
|
t-combinatorics |
29/4 |
Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Star.lean |
2 |
3 |
['github-actions', 'vlad902'] |
nobody |
none |
4-50667 4 days ago |
11-9699 11 days ago |
11-65054 11 days |
| 41310 |
SnirBroshi author:SnirBroshi |
feat(Algebra/Group/Subgroup/ZPowers/Lemmas): generalize from pairs to `Finset`s |
Generalize `closure_eq_zmultiples`/`zmultiples_sup`/`zmultiples_inf` from pairs to `Finset`s. For `s : Finset ℤ`:
- `closure (s : Set ℤ) = zmultiples (s.gcd id)`
- `s.sup zmultiples = zmultiples (s.gcd id)`
- `s.inf zmultiples = zmultiples (s.lcm id)`
---
If the large imports aren't okay we could have a new `ZPowers/Finset.lean` or `ZPowers/FinsetLemmas.lean`.
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- [x] depends on: #41261
[](https://gitpod.io/from-referrer/)
|
t-algebra
large-import
label:t-algebra$ |
28/3 |
Mathlib/Algebra/Group/Subgroup/ZPowers/Lemmas.lean |
1 |
2 |
['github-actions', 'mathlib-dependent-issues'] |
nobody |
none |
4-47168 4 days ago |
4-48482 4 days ago |
4-50253 4 days |
| 35296 |
Rida-Hamadani author:Rida-Hamadani |
feat(SimpleGraph): taking or dropping from a cycle results in a path |
---
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- [x] depends on: #33249
- [x] depends on: #35295
- [x] depends on: #35292
[](https://gitpod.io/from-referrer/)
|
t-combinatorics
maintainer-merge
|
13/0 |
Mathlib/Combinatorics/SimpleGraph/Paths.lean |
1 |
4 |
['YaelDillies', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
1 |
4-41225 4 days ago |
4-73229 4 days ago |
4-74263 4 days |
| 41467 |
vlad902 author:vlad902 |
chore(MulLECancellable): rename lemmas |
Right now MulLECancellable has dual `Injective/inj` and `injective_left/inj_left` lemmas. Rename the first pair to `injective_right/inj_right` to match and add a `IsRightRegular` lemma to match the `IsLeftRegular` one.
---
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[](https://gitpod.io/from-referrer/)
|
t-algebra label:t-algebra$ |
25/9 |
Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Sub/Unbundled/Basic.lean,Mathlib/Data/ENNReal/Operations.lean |
3 |
1 |
['github-actions'] |
nobody |
none |
4-36814 4 days ago |
4-39773 4 days ago |
4-42209 4 days |
| 40964 |
grunweg author:grunweg |
chore: explicitly specify free universes in `TopCat` and friends |
Avoid free universe variables, as discussed on Zulip: https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2338223.20The.20Category.20of.20C.5En.20Manifolds/near/587824522
Perhaps, we should have a linter for this, such as by
- extending the `pp_universes` attribute (TODO fix name) to take a list of universes, and only pretty-print those
- the linter checks for any universes which are annotated with this attribute: if a declaration has a universe metavariable corresponding to such a universe, we warn
---
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-->
[](https://gitpod.io/from-referrer/)
|
t-algebra label:t-algebra$ |
117/114 |
Mathlib/Algebra/Category/ModuleCat/Topology/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Homology.lean,Mathlib/AlgebraicGeometry/Scheme.lean,Mathlib/AlgebraicGeometry/Spec.lean,Mathlib/RepresentationTheory/Continuous/TopRep.lean,Mathlib/Topology/Specialization.lean,MathlibTest/CategoryTheory/ConcreteCategory/TopModuleCat.lean |
7 |
9 |
['github-actions', 'grunweg', 'leanprover-radar', 'mathlib-merge-conflicts'] |
nobody |
none |
4-35136 4 days ago |
4-36370 4 days ago |
13-54519 13 days |
| 39993 |
Brian-Nugent author:Brian-Nugent |
feat(Topology/CategoryTheory): TopologicalSpace.Opens.map preserves colimits and finite limits |
---
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|
t-topology
t-category-theory
large-import
|
50/17 |
Mathlib/Geometry/RingedSpace/OpenImmersion.lean,Mathlib/Geometry/RingedSpace/PresheafedSpace/Gluing.lean,Mathlib/Topology/Category/TopCat/Opens.lean,Mathlib/Topology/Sheaves/Presheaf.lean |
4 |
3 |
['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
none |
4-34080 4 days ago |
4-34083 4 days ago |
4-33733 4 days |
| 41324 |
luigi-massacci author:luigi-massacci |
feat: multiplication by a regular function in D^n_{K} as CLM (bilinear form version) |
Preliminary lemma for multiplication of a classical distribution by a regular function. The proof is essentially the same as that for `TemperedDistribution`, modulo details.
---
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|
t-analysis |
79/4 |
Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
4-30384 4 days ago |
4-31243 4 days ago |
9-18624 9 days |
| 41484 |
FernandoChu author:FernandoChu |
feat(CategoryTheory): kan extensions from isos |
This PR constructs lifts out of isomorphisms of 1-cells, and shows that being (abs) Kan is preserved by this. This is done for all four notions of left/right lifts/extensions.
This is needed for the oo-cosmos project.
----
**AI disclosure**. Claude was used in defining the API for the left extension case. After manually fixing its bad proofs/definitions/docstrings, Claude was later asked to replicate this for the other three cases, which I again finetuned. |
t-category-theory
LLM-generated
large-import
|
330/3 |
Mathlib/CategoryTheory/Bicategory/Extension.lean,Mathlib/CategoryTheory/Bicategory/Kan/IsKan.lean |
2 |
3 |
['FernandoChu', 'github-actions', 'grunweg'] |
nobody |
none |
4-29834 4 days ago |
4-35036 4 days ago |
4-34686 4 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 |
1 |
4-29031 4 days ago |
5-5409 5 days ago |
67-55542 67 days |
| 41486 |
TTony2019 author:TTony2019 |
feat(Analysis/Convex/Intrinsic): add open segment intrinsic interior results |
Add open segment intrinsic interior results: `x ∈ intrinsicInterior 𝕜 C` and `y ∈ intrinsicClosure 𝕜 C`, then the open segment
from `x` to `y` stays in `intrinsicInterior 𝕜 C`.
Co-authored-by: Zichen Wang <imathwy@users.noreply.github.com> |
t-topology
new-contributor
t-analysis
|
68/0 |
Mathlib/Analysis/Convex/Intrinsic.lean,Mathlib/Analysis/Convex/Topology.lean,Mathlib/Topology/Algebra/Module/Basic.lean,Mathlib/Topology/Homeomorph/Defs.lean |
4 |
3 |
['TTony2019', 'github-actions'] |
nobody |
none |
4-27686 4 days ago |
4-32376 4 days ago |
4-32026 4 days |
| 41443 |
alreadydone author:alreadydone |
feat(RingTheory/AdjoinRoot): add AdjoinRoot.isFractionRing |
Co-authored-by: Sriram Chinthalagiri Venkata @sriram3301
Co-authored-by: David Kurniadi Angdinata @Multramate
This contribution was created as part of the Heidelberg Lean workshop "Formalising algebraic geometry" in November 2025.
---
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t-algebra
t-ring-theory
label:t-algebra$ |
88/7 |
Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Algebraic/Integral.lean,Mathlib/RingTheory/Localization/Algebra.lean |
3 |
3 |
['alreadydone', 'github-actions', 'leanprover-radar'] |
nobody |
none |
4-22095 4 days ago |
4-75732 4 days ago |
5-17763 5 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.
---
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|
tech debt
t-algebra
label:t-algebra$ |
244/245 |
Mathlib/Algebra/MonoidAlgebra/Defs.lean,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 |
36 |
4 |
['eric-wieser', 'github-actions'] |
nobody |
none |
4-21876 4 days ago |
4-23934 4 days ago |
4-26632 4 days |
| 41306 |
vlad902 author:vlad902 |
feat(SimpleGraph): reduce CycleGraph imports |
Reduce the imports for CycleGraph.lean and re-prove and move a few lemmas around as a result.
---
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|
t-combinatorics |
44/23 |
Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/CycleGraph.lean,Mathlib/Combinatorics/SimpleGraph/Hasse.lean |
3 |
13 |
['SnirBroshi', 'github-actions', 'vlad902'] |
nobody |
1 |
4-19263 4 days ago |
9-37608 9 days ago |
9-37300 9 days |
| 26214 |
Thmoas-Guan author:Thmoas-Guan |
feat(Algebra): definition of depth |
In this PR, we defined the depth of two modules as the minimal order of nonvanishing `Ext` and the `I-depth` for ideal `I` and some basic properties. Including the equivalence of the two in the condition of rees theorem.
---
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|
t-algebra label:t-algebra$ |
410/0 |
Mathlib.lean,Mathlib/RingTheory/Depth/Basic.lean |
2 |
11 |
['Thmoas-Guan', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] |
nobody |
none |
4-14812 4 days ago |
7-12037 7 days ago |
7-30163 7 days |
| 41494 |
FordUniver author:FordUniver |
feat(Analysis/Convex): first-order convexity inequalities |
Adds first-order characterizations of convexity for differentiable functions in three forms — directional, Fréchet, and gradient — together with concave duals, strict variants, iff converses, and the first-order optimality corollaries `ConvexOn.isMinOn_of_fderiv_eq_zero` / `ConvexOn.isMinOn_of_gradient_eq_zero`. `Analysis.Convex.Deriv` picks up the 1D additive forms of the slope inequalities.
---
The motivation is the Baillon–Haddad theorem in the Lipschitz-smooth stack (#39574 and follow-ups), whose proof plays the gradient form of the first-order convexity inequality against the descent bound of a `K`-smooth function. `LineDeriv` carries the proof content via 1D line restriction (`ConvexOn.lineRestriction`); `FDeriv` and `Gradient` are restatements via `lineDeriv_eq_fderiv` and Riesz (`inner_gradient_left`) respectively. This inverts mathlib's usual FDeriv-as-foundation default because convex first-order inequalities are naturally 1D — they only need directional differentiability, and the FDeriv/gradient forms are strictly stronger restatements.
- [x] depends on: #39203
- [x] depends on: #39198
|
t-analysis |
503/0 |
Mathlib.lean,Mathlib/Analysis/Convex/Deriv.lean,Mathlib/Analysis/Convex/FDeriv.lean,Mathlib/Analysis/Convex/Gradient.lean,Mathlib/Analysis/Convex/LineDeriv.lean |
5 |
2 |
['github-actions', 'mathlib-dependent-issues'] |
nobody |
none |
4-14222 4 days ago |
4-16479 4 days ago |
4-16129 4 days |
| 41496 |
kebekus author:kebekus |
feat: companion lemmas to `MeromorphicOn.exists_ecanonicalDecomp`, API for the extended canonical decomposition |
To prepare for the proof of the classic Poisson-Jensen formula in the next PR, establish several companion lemmas to `MeromorphicOn.exists_ecanonicalDecomp` that provide an API for using the extended canonical decomposition introduced in #40191.
This material is used in [Project VD](https://github.com/kebekus/ProjectVD), formalizing Value Distribution Theory for meromorphic functions on the complex plane.
---
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|
t-analysis |
124/1 |
Mathlib/Analysis/Complex/CanonicalDecomposition.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
4-10843 4 days ago |
4-10843 4 days ago |
4-10493 4 days |
| 41493 |
kbuzzard author:kbuzzard |
chore: simplify `show _ from by _` to `show _ by _` |
`show X from t` proves `X` using the term `t`; `show X by tac` proves `X` using the tactic `tac`.
`show X from by tac` is thus a redundant lengthening of `show X by tac`.
This replaces all 21 occurrences of `show _ from by _` in the library with `show _ by _`.
---
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(Note: there are also 10 `suffices _ from by _` occurrences -- should I change them in this PR too?) |
|
22/22 |
Mathlib/Algebra/Lie/Weights/Cartan.lean,Mathlib/Analysis/Convex/Approximation.lean,Mathlib/Analysis/MeanInequalitiesPow.lean,Mathlib/Analysis/Polynomial/MahlerMeasure.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Pullbacks.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Mono.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/LinearAlgebra/JordanChevalley.lean,Mathlib/LinearAlgebra/Projectivization/Action.lean,Mathlib/RingTheory/HopfAlgebra/Convolution.lean,Mathlib/Topology/Algebra/Monoid.lean,Mathlib/Topology/Compactification/OnePoint/Basic.lean |
14 |
4 |
['felixpernegger', 'github-actions', 'grunweg', 'kbuzzard'] |
nobody |
none |
4-10723 4 days ago |
4-11091 4 days ago |
4-10771 4 days |
| 41413 |
YaelDillies author:YaelDillies |
feat(RingTheory/MonoidAlgebra): `toAdditive` as a `BialgEquiv` |
Also add a few missing lemmas about the less bundled versions, make variable names follow the local file convention and explicit a missing argument.
From Toric
---
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|
t-ring-theory
toric
|
90/23 |
Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/MapDomain.lean,Mathlib/RingTheory/Bialgebra/MonoidAlgebra.lean,Mathlib/RingTheory/FiniteType.lean |
4 |
5 |
['Whysoserioushah', 'YaelDillies', 'github-actions'] |
nobody |
none |
4-10552 4 days ago |
4-15166 4 days ago |
6-1442 6 days |
| 36813 |
AlexeyMilovanov author:AlexeyMilovanov |
feat(Computability.Encoding): add self-delimiting unary and pair encodings |
Adds self-delimiting boolean encodings to `Mathlib.Computability.Encoding`.
**Key changes:**
* **`unaryPrefixEncodingNat`**: A self-delimiting unary `Encoding ℕ Bool`, using the code $1^n0$.
* **`encodingProdBool`**: Builds an `Encoding (α × β) Bool` from boolean encodings of `α` and `β`, by prefixing the length of the first encoded component.
* **`encodingListBool`**: Builds an `Encoding (List α) Bool` from a boolean encoding of `α`, using self-delimiting element encodings.
* **`UnaryPrefix` helpers**: Internal-style helper API for the underlying length-prefixed boolean-list encoding and decoding. |
t-computability
new-contributor
|
98/0 |
Mathlib/Computability/Encoding.lean |
1 |
6 |
['AlexeyMilovanov', 'Komyyy', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts'] |
nobody |
none |
4-9515 4 days ago |
4-9515 4 days ago |
20-51442 20 days |
| 41119 |
teorth author:teorth |
feat(MeasureTheory/Integral/IntegralEqImproper): {integral,integrableOn}_comp_{exp,log}_Ioi |
Change of variable lemmas for improper integrals on `Set.Ioi a` under `Real.exp` or `Real.log`. Conveniently, no measurability hypotheses on the integrand are needed.
---
Also adds variants of the linear change of variables lemmas `integral_comp_mul_left_Ioi` and `integral_comp_mul_right_Ioi` that are convenient in applications.
The initial code was human generated; an AI agent was used to help proofread and refactor the code subsequently.
- [x] depends on: #41118
[](https://gitpod.io/from-referrer/)
|
t-measure-probability
new-contributor
|
61/26 |
Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean |
1 |
3 |
['github-actions', 'mathlib-dependent-issues'] |
nobody |
none |
4-8277 4 days ago |
4-74825 4 days ago |
4-78625 4 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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|
|
9/0 |
Mathlib/Order/Basic.lean,MathlibTest/Tactic/GRewrite.lean |
2 |
1 |
['github-actions'] |
nobody |
none |
4-7457 4 days ago |
4-10914 4 days ago |
4-10564 4 days |
| 41512 |
teorth author:teorth |
feat (Order/Interval/Finset/Floor): Relating membership of an Int or Nat cast in intervals to intervals of floor and ceil functions |
For a `FloorRing` (resp. `FloorSemiring`) `α`, we relate membership of a cast `↑n` in an interval
of `α` to membership of the integer (resp. natural number) `n` in the corresponding interval with
floor/ceil endpoints, for instance `Int.coe_mem_Ioc_iff : ↑n ∈ Set.Ioc a b ↔ n ∈ Set.Ioc ⌊a⌋ ⌊b⌋`.
If the right-hand side is finite, we express them as `Finset` instead.
---
AI was used to extend a small initial set of human-generated lemmas to the full set in this PR, which were then reviewed and edited by myself.
This code is placed in a new file because the core `Algebra.Order.Floor` files explicitly disallow the use of `Finset`.
[](https://gitpod.io/from-referrer/)
|
t-order |
85/0 |
Mathlib.lean,Mathlib/Order/Interval/Finset/Floor.lean |
2 |
2 |
['github-actions'] |
nobody |
none |
3-81529 3 days ago |
3-83160 3 days ago |
3-82810 3 days |
| 41389 |
felixpernegger author:felixpernegger |
chore: reduce `import all` |
Removes `import all` whenever possible. I also tried to "downgrade" by changing to `import` from `import all`, but that never made a difference. Excludes MathlibTest.
For a related PR, see #41222.
---
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[](https://gitpod.io/from-referrer/)
|
|
0/7 |
Mathlib/Control/Monad/Cont.lean,Mathlib/Data/Fintype/Parity.lean,Mathlib/Data/Int/Bitwise.lean,Mathlib/Lean/Meta/RefinedDiscrTree/Encode.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/PNatToNat.lean |
6 |
7 |
['felixpernegger', 'github-actions', 'grunweg', 'leanprover-radar'] |
nobody |
none |
3-74722 3 days ago |
7-1265 7 days ago |
7-915 7 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`.
---
A new file needed to be created because many files downstream of this file 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 |
71/0 |
Mathlib.lean,Mathlib/Topology/MetricSpace/HeineCantor.lean |
2 |
2 |
['github-actions'] |
nobody |
none |
3-74601 3 days ago |
3-76188 3 days ago |
3-75939 3 days |
| 41131 |
gnahz04 author:gnahz04 |
feat(Analysis/InnerProductSpace): uniform convergence in an RKHS with bounded kernel |
Adds `RKHS.tendstoUniformlyOn_of_norm_kerFun_le`: if the kernel functions are uniformly bounded on a set `s` (`‖kerFun H x‖ ≤ C` for `x ∈ s`), then convergence in `H`-norm implies uniform convergence of the underlying functions on `s`. The whole-space version `tendstoUniformly_of_norm_kerFun_le` is a corollary.
This is the quantitative strengthening enabled by `norm_apply_le`: pointwise convergence already follows from the existing `continuous_eval`, but the explicit bound `‖f x‖ ≤ ‖f‖ * ‖kerFun H x‖` upgrades it to uniform convergence under a bounded kernel.
Per review by Hampus Nyberg: generalized to `TendstoUniformlyOn` on a set, and stated the bound without the `√` (on `‖kerFun H x‖`, which equals `√‖kernel H x x‖`).
**AI disclosure.** I used Claude Code (Claude Opus 4.8) to draft and iterate the Lean proof. I work in kernel methods / RKHS, understand the statement and proof, and can justify the design choices to reviewers.
🤖 Generated with [Claude Code](https://claude.com/claude-code) |
t-analysis
new-contributor
LLM-generated
|
27/0 |
Mathlib/Analysis/InnerProductSpace/Reproducing.lean |
1 |
6 |
['Maldooor', 'github-actions', 'gnahz04'] |
nobody |
none |
3-65519 3 days ago |
12-6503 12 days ago |
12-6284 12 days |
| 38975 |
ldct author:ldct |
feat(EReal): Add equations for EReal |
Add equational lemmas for the simplifier to simplify `[natural number literal] + ⊤` in `EReal`, and add a test file in `MathlibTest/EReal.lean`.
Without these lemmas, `simp` fails to close many of the goals in `MathlibTest/EReal.lean`. I believe simp should close all of them.
An alternative is to add something like this as a simp lemma, to allow `top_add_of_ne_bot` to make progress, but it's not clear to me that this is desirable as a simp lemma, since it's not equational
```
example {n : ℕ} [n.AtLeastTwo] : (ofNat(n) : EReal) ≠ ⊤ := by
exact Ne.symm (not_eq_of_beq_eq_false rfl)
```
---
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[](https://gitpod.io/from-referrer/)
|
t-data |
32/0 |
Mathlib/Data/EReal/Operations.lean,MathlibTest/EReal.lean |
2 |
2 |
['github-actions', 'vihdzp'] |
nobody |
none |
3-63094 3 days ago |
67-70279 67 days ago |
67-69929 67 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 |
139/92 |
Mathlib/Geometry/Euclidean/Angle/Unoriented/Affine.lean,Mathlib/Geometry/Euclidean/Sphere/Power.lean |
2 |
1 |
['github-actions'] |
nobody |
none |
3-63094 3 days ago |
26-57318 26 days ago |
26-56989 26 days |
| 40687 |
michaellee94 author:michaellee94 |
feat(Analysis/ODE): uniqueness of integral curves on intervals and intersections |
Adds some uniqueness lemmas for integral curves of a Lipschitz vector field, proved via Grönwall's inequality. Split out from #26413 (existence of maximal solutions). |
t-analysis
new-contributor
|
87/0 |
Mathlib/Analysis/ODE/ExistUnique.lean |
1 |
2 |
['github-actions'] |
nobody |
none |
3-63092 3 days ago |
25-60366 25 days ago |
25-60016 25 days |
| 40534 |
mcdoll author:mcdoll |
feat(Algebra): introduce notation typeclass for composition of functions |
This PR defines two new typeclasses: `FComp` and `IsCompApply`. The former is just a notation typeclass with notation `(g ∘ᶠ f)` and the second one asserts that `(g ∘ᶠ f) x = g (f x)`.
---
There are two PRs that illustrate the use of these classes: #41169 and #41224
The second one is closer to what we actually implement here, but not sorry-free (because I ran into unrelated defeq abuse pretty far down the line)
<!-- Your PR title will become the first line of the commit message.
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[](https://gitpod.io/from-referrer/)
|
t-algebra label:t-algebra$ |
106/15 |
Mathlib/Algebra/Notation/Defs.lean,Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Data/FunLike/IsApply.lean,Mathlib/Geometry/Manifold/GroupLieAlgebra.lean,Mathlib/Geometry/Manifold/VectorField/LieBracket.lean,Mathlib/NumberTheory/Height/Basic.lean,Mathlib/Probability/Distributions/Gaussian/HasGaussianLaw/Independence.lean,Mathlib/RingTheory/Coalgebra/Basic.lean,Mathlib/Topology/VectorBundle/Hom.lean |
10 |
1 |
['github-actions'] |
nobody |
none |
3-53418 3 days ago |
3-53418 3 days ago |
3-53068 3 days |
| 40941 |
JX-Mo author:JX-Mo |
feat(RepresentationTheory): add stabilizers of vectors in representations |
Add Representation.stabilizer: the subgroup fixing a vector in a representation.
Provide basic lemmas for zero vectors, scalar multiples, sums, intertwining maps, and conjugations, as a first step toward smooth representations. Make representation-theoretic arguments use this specialized API instead of repeatedly unfolding the fixed-vector condition or routing through the more general MulAction stabilizer API. |
t-algebra
new-contributor
label:t-algebra$ |
68/0 |
Mathlib.lean,Mathlib/RepresentationTheory/Stabilizer.lean |
2 |
66 |
['JX-Mo', 'Whysoserioushah', 'github-actions', 'tb65536'] |
nobody |
1 |
3-50416 3 days ago |
3-50952 3 days ago |
16-22774 16 days |
| 41098 |
vlad902 author:vlad902 |
feat(RingTheory): krull dimension of a polynomial ring in an infinite number of variables |
Add a simp lemma that `dim(R[X_1, ...]) = ∞` and also derive an ENat-valued lemma that `dim(R[X_s]) = dim(R) + card(X_s)`. Note that I keep the original lemma for finite index sets as @[simp] since this is likely to be the more common case in practice.
---
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[](https://gitpod.io/from-referrer/)
|
t-ring-theory |
30/1 |
Mathlib/Data/ENat/Basic.lean,Mathlib/RingTheory/KrullDimension/NonZeroDivisors.lean,Mathlib/RingTheory/KrullDimension/Polynomial.lean |
3 |
2 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
none |
3-39363 3 days ago |
3-41395 3 days ago |
14-85942 14 days |
| 41477 |
lucifer1004 author:lucifer1004 |
feat(Analysis/InnerProductSpace): add Hilbert-Schmidt inner product and norm |
This PR adds the Hilbert-Schmidt (Frobenius) inner product and norm on linear maps `E →ₗ[𝕜] F` between finite-dimensional inner product spaces over an `RCLike` field, built through `InnerProductSpace.Core`. The instances are scoped under `LinearMap.Norms.HilbertSchmidt` (rather than global, since `E →ₗ[𝕜] F` should not carry a canonical norm), mirroring the `Matrix.Norms.Frobenius` convention.
Main declarations:
- `LinearMap.hilbertSchmidtCore`
- `LinearMap.hilbertSchmidtNormedAddCommGroup`
- `LinearMap.hilbertSchmidtInnerProductSpace`
- `LinearMap.trace_adjoint_comp_eq_sum_inner`
- `LinearMap.hilbertSchmidt_inner_eq_trace`
- `LinearMap.hilbertSchmidt_norm_sq_eq_re_trace`
- `LinearMap.hilbertSchmidt_norm_sq_eq_sum_norm_sq`
This is the foundation for a sequence of PRs proving the Eckart-Young-Mirsky best low-rank approximation theorems on top of `LinearMap.singularValues`; see the notes below the fold.
Verification:
- Builds
- `runLinter` passes
- `lint-style` clean
- No `sorry`
AI use disclosure: this PR was developed with the assistance of Claude (via Claude Code), which was used to draft and refactor the Lean proofs under my direction. I have reviewed the final code, can justify the design decisions, and take responsibility for it.
---
Following review feedback on Zulip, the original four-file PR has been split; this PR now contains only the Hilbert-Schmidt norm, and the proofs across all four files have been refactored to be more compact. The follow-ups are:
- Ky Fan inequality + Eckart-Young in Frobenius norm (branch `eckart-young-frobenius`, depends on this PR);
- the operator norm equals the largest singular value (branch `opnorm-singular-values`, independent);
- Eckart-Young in operator norm (branch `eckart-young-spectral`, independent).
I would especially appreciate feedback on whether the scoped `LinearMap.Norms.HilbertSchmidt` instance is the right API here, or whether a type-synonym approach (à la `WithLp`) would be preferred.
|
t-analysis
new-contributor
LLM-generated
|
120/0 |
Mathlib.lean,Mathlib/Analysis/InnerProductSpace/HilbertSchmidt.lean |
2 |
2 |
['github-actions'] |
nobody |
none |
3-38238 3 days ago |
4-52999 4 days ago |
4-52649 4 days |
| 41248 |
tb65536 author:tb65536 |
chore(NumberTheory/RamificationInertia/Basic): deprecate file |
This PR deprecates `NumberTheory/RamificationInertia/Basic.lean` in favor of `RingTheory/RamificationInertia/Basic.lean`.
---
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|
t-ring-theory
t-algebra
t-number-theory
label:t-algebra$ |
40/6 |
Mathlib/NumberTheory/RamificationInertia/Basic.lean |
1 |
6 |
['Multramate', 'github-actions', 'grunweg', 'mathlib-merge-conflicts', 'tb65536'] |
nobody |
1 |
3-36581 3 days ago |
3-37414 3 days ago |
10-20275 10 days |
| 41399 |
vlad902 author:vlad902 |
feat(MvPolynomial): ideal generated by variables is prime over a domain |
---
AI: Used Claude to help search for lemmas and golf, no AI code made it into the final PR.
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|
t-ring-theory |
38/5 |
Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/RingTheory/MvPolynomial/Ideal.lean |
2 |
1 |
['github-actions'] |
nobody |
none |
3-34698 3 days ago |
6-34592 6 days ago |
6-35653 6 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
label:t-algebra$ |
0/4 |
Mathlib/Algebra/Group/WithOne/Defs.lean |
1 |
2 |
['Multramate', 'github-actions'] |
nobody |
1 |
3-33714 3 days ago |
20-9882 20 days ago |
20-9532 20 days |
| 41522 |
SnirBroshi author:SnirBroshi |
feat(Combinatorics/SimpleGraph/Paths): existence of longest paths/trails/cycles/circuits |
We already have the existence of a longest path/trail. This adds:
- the existence of a longest cycle/circuit in non-acyclic graphs
- the existence of a longest path/trail from a specific vertex
- the existence of a longest path/trail between specific endpoints
- the existence of a longest cycle/circuit from a specific vertex
---
`exists_isTrail_forall_length_le_of_pred` is the common argument that works for any predicate on trails, which is then used to prove the 10 versions mentioned above.
I know this looks a bit ugly, but taking a longest path/trail/cycle/circuit is a useful proof technique.
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|
t-combinatorics |
128/22 |
Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean |
3 |
1 |
['github-actions'] |
nobody |
none |
3-33307 3 days ago |
3-53847 3 days ago |
3-53497 3 days |
| 40952 |
tb65536 author:tb65536 |
feat(Algebra/Group/Subgroup/Basic): monotonicity of inertia subgroups |
This PR proves that inertia subgroups are monotone.
---
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|
t-ring-theory
t-algebra
label:t-algebra$ |
5/1 |
Mathlib/Algebra/Group/Subgroup/Basic.lean |
1 |
1 |
['Multramate', 'github-actions'] |
nobody |
1 |
3-33279 3 days ago |
19-13452 19 days ago |
19-13103 19 days |
| 41435 |
SnirBroshi author:SnirBroshi |
feat(Combinatorics/SimpleGraph/Hamiltonian): a graph with a Hamiltonian path is connected |
and other small Hamiltonian lemmas.
---
The new public import is needed because `Nat.card` was previously only imported privately.
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|
t-combinatorics |
55/14 |
Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
3-33209 3 days ago |
3-40726 3 days ago |
5-58835 5 days |
| 36815 |
EtienneC30 author:EtienneC30 |
feat: a measurable space structure on the type of continuous maps |
Endow the type `C(X, Y)` of continuous maps from `X` to `Y` with the Borel sigma-algebra coming from the compact-open topology and show that, under some assumptions on `X` and `Y`, this is equal to the restriction of the product sigma-algebra over `X → Y`.
Provide a measurable equivalence between `{f : X → Y // Continuous f}` and `C(X, Y)`.
Co-authored-by: @RemyDegenne
---
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|
t-topology
brownian
t-measure-probability
|
256/0 |
Mathlib.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/ContinuousMap.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/Basic.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/Separation/Regular.lean |
6 |
27 |
['ADedecker', 'EtienneC30', 'felixpernegger', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
none |
3-30722 3 days ago |
68-35936 68 days ago |
108-30936 108 days |
| 41432 |
SnirBroshi author:SnirBroshi |
chore(Combinatorics/SimpleGraph/Paths): spell `getVert` injectivity lemmas using `Set` intervals |
e.g. replace `{i | i ≤ p.length}` with `Iic p.length` in `IsPath.getVert_injOn`, which is the canonical spelling.
Proofs using `Set.mem_setOf`/`Set.mem_setOf_eq` had to be fixed, and got golfed along the way.
I also rewrote the proof of `IsPath.getVert_injOn` since it seemed too long.
---
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|
t-combinatorics |
29/60 |
Mathlib/Combinatorics/SimpleGraph/Connectivity/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean |
2 |
1 |
['github-actions'] |
nobody |
none |
3-30011 3 days ago |
5-64074 5 days ago |
5-63810 5 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 |
141/0 |
Mathlib.lean,Mathlib/MeasureTheory/Function/BorelGrowth.lean,docs/references.bib |
3 |
1 |
['github-actions'] |
nobody |
none |
3-28815 3 days ago |
3-29466 3 days ago |
3-29285 3 days |
| 41521 |
BryceT233 author:BryceT233 |
chore(Algebra/Order/Antidiag): relax an assumption in the definition of `HasAntidiagonal` |
This PR relaxes the typeclass requirement for `HasAntidiagonal` from `AddMonoid A` to `Add A`, which is useful for defining multiplications in `TotalMonoidAlgebra`(#41472).
---
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|
t-algebra label:t-algebra$ |
16/17 |
Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Algebra/Order/Antidiag/Tendsto.lean |
2 |
4 |
['BryceT233', 'eric-wieser', 'github-actions'] |
nobody |
none |
3-28529 3 days ago |
3-30783 3 days ago |
3-54168 3 days |
| 41433 |
SnirBroshi author:SnirBroshi |
feat(Combinatorics/SimpleGraph/Paths): more path/circuit/cycle lemmas |
- two `(p.append q).IsPath` lemmas (splitting to either `p` & `q.tail` or `p.dropLast` & `q`)
- `p.reverse.IsCircuit`
- `p.dropLast.IsPath ↔ p.tail.IsPath`
- `p.IsCycle ↔ p.dropLast.IsPath ∧ 3 ≤ p.length`
---
Golfs a few small things using the new lemmas as a drive by.
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|
t-combinatorics |
35/9 |
Mathlib/Combinatorics/SimpleGraph/Paths.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
3-27897 3 days ago |
3-28472 3 days ago |
5-60008 5 days |
| 40328 |
xroblot author:xroblot |
feat(FieldTheory/IntermediateField): add PowerBasis.ofAdjoinSimpleEqTop |
Adds `PowerBasis.ofAdjoinSimpleEqTop`, the `IntermediateField.adjoin` analogue of the
existing `PowerBasis.ofAdjoinEqTop` (which uses `Algebra.adjoin`): if `α` generates `L`
over `K` (i.e. `K⟮α⟯ = ⊤`) and is integral over `K`, then `α` defines a `PowerBasis`
for `L` over `K`.
The declaration is placed in `Mathlib.FieldTheory.IntermediateField.Adjoin.Basic`
(alongside `adjoin.powerBasis` and `adjoin.finrank`) rather than `Adjoin.Algebra`,
since its proof uses `adjoin.powerBasis` and `PowerBasis.map`.
:robot: This PR was extracted from the [SKW project](https://github.com/xroblot/SKW) by Claude. |
t-algebra label:t-algebra$ |
18/0 |
Mathlib/FieldTheory/IntermediateField/Adjoin/Basic.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
3-26849 3 days ago |
35-12086 35 days ago |
35-11978 35 days |
| 41326 |
Yu-Misaka author:Yu-Misaka |
feat(GroupTheory): summation over a conjugacy class |
Greetings! This PR proves `ConjClasses.sum_carrier_mul_left`: Summing `f (g * h)` over `h` in the conjugacy class of `g` equals summing `f (h * g)`.
This result can potentially help prove, for example, `∑ h ∈ (ConjClasses.mk g).carrier, ρ h` is intertwining in the settings of representation theory.
---
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|
t-group-theory
large-import
|
45/0 |
Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/ConjFinite.lean |
2 |
18 |
['Yu-Misaka', 'github-actions', 'tb65536', 'wwylele'] |
nobody |
none |
3-26538 3 days ago |
7-39896 7 days ago |
8-60678 8 days |
| 41403 |
YaelDillies author:YaelDillies |
chore(Algebra/SkewMonoidAlgebra): deprecate `sum` |
One should just use `Finsupp.sum` instead.
---
- [x] depends on: #41365
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|
t-algebra label:t-algebra$ |
117/155 |
Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/Algebra/SkewMonoidAlgebra/Lift.lean,Mathlib/Algebra/SkewMonoidAlgebra/Support.lean,Mathlib/Algebra/SkewPolynomial/Basic.lean |
4 |
12 |
['YaelDillies', 'eric-wieser', 'github-actions', 'mathlib-dependent-issues'] |
nobody |
none |
3-24006 3 days ago |
4-23712 4 days ago |
4-26964 4 days |
| 35402 |
samueloettl author:samueloettl |
feat(Dynamics/BirkhoffSum): birkhoffAverage const |
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I think this is useful and one of these should be a simp lemma.
I'm not really sure if I got the naming of the theorems correct.
When generalizing to the assumption (n : R) ≠ 0 instead of the special case CharZero R with n ≠ 0 I had to use "open Classical in". I'm a bit unfamiliar with that part so please check if this makes sense. See also https://github.com/leanprover-community/mathlib4/pull/35307#discussion_r2823586252
[](https://gitpod.io/from-referrer/)
|
t-dynamics
new-contributor
|
14/0 |
Mathlib/Dynamics/BirkhoffSum/Average.lean |
1 |
29 |
['Maldooor', 'github-actions', 'lua-vr', 'mcdoll', 'samueloettl'] |
nobody |
none |
3-21441 3 days ago |
74-16042 74 days ago |
140-14505 140 days |
| 41536 |
Mathias-Stout author:Mathias-Stout |
chore(Algebra): make quaternion directory |
We create separate directory for quaternions and move the two existing files into it.
This prepares a follow-up PR proving that quaternions are central simple.
Co-authored-by: Justus Springer <justusspringer@gmx.de>
---
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|
file-removed
new-contributor
|
7/7 |
Mathlib.lean,Mathlib/Algebra/DualQuaternion.lean,Mathlib/Algebra/Quaternion/Basic.lean,Mathlib/Algebra/Quaternion/Basis.lean,Mathlib/Analysis/Quaternion.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Equivs.lean,MathlibTest/Quaternion.lean |
7 |
2 |
['github-actions'] |
nobody |
none |
3-14028 3 days ago |
3-15817 3 days ago |
3-15467 3 days |
| 41539 |
rmhi author:rmhi |
chore(RepresentationTheory/Homological/ContCohomology): refactor functoriality |
Currently, functoriality of continuous cohomology is given by `ContCohomology.map`, which takes
a continuous group homomorphism \phi and an intertwining map f: res \phi X \to Y and returns a map from the
continuous cohomology of X to the continuous cohomology of Y.
The problem with this is that `ContCohomology.map` does not have a natural type such as Functor or NatTrans.
In this PR, we split `ContCohomology.map` as a composition of `(continuousCohomologyFunctor _ _ _).map` and a restriction map in continuous cohomology, which is defined as a natural transformation `resNatTrans`.
co-authored-by: Edison Xie @Whysoserioushah
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|
t-algebra label:t-algebra$ |
392/56 |
Mathlib/RepresentationTheory/Continuous/Basic.lean,Mathlib/RepresentationTheory/Continuous/TopRep.lean,Mathlib/RepresentationTheory/Homological/ContCohomology/Functoriality.lean |
3 |
1 |
['github-actions'] |
nobody |
none |
3-11932 3 days ago |
3-13499 3 days ago |
3-13238 3 days |
| 41092 |
wwylele author:wwylele |
feat(Analysis): characterizing and congr lemma for toMeromorphicNFAt |
The first two new lemma `toMeromorphicNFAt_of_meromorphicOrderAt_ne_zero` and `MeromorphicAt.meromorphicOrderAt_nonneg_iff_analyticAt_toMeromorphicNFAt` characterize the behavior of `toMeromorphicNFAt` for meromorphic function, so one no longer needs to unfold the definition of it.
`toMeromorphicNFAt_congr` and `MeromorphicAt.toMeromorphicNFAt_eventuallyEq_iff` shows that two functions have equal `toMeromorphicNFAt` in nhds if they equal in the punctured nhds.
Co-authored-by: Monica Omar <23701951+themathqueen@users.noreply.github.com>
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[](https://gitpod.io/from-referrer/)
|
t-analysis |
37/0 |
Mathlib/Analysis/Meromorphic/NormalForm.lean |
1 |
30 |
['copilot-pull-request-reviewer', 'github-actions', 'mathlib-dependent-issues', 'themathqueen', 'wwylele'] |
nobody |
none |
3-9007 3 days ago |
3-17503 3 days ago |
11-36734 11 days |
| 41541 |
felixpernegger author:felixpernegger |
chore: prefer `classical` over `open scoped Classical` in proofs |
In #41423 it came up that it is preferable to use `classical` in proofs instead of `open (scoped) Classical`, as its slightly easier to maintain. This PR replaces all such occurences where it can be reasonably done.
This is likely my last PR about this topic.
(I used Claude to fix some git issue, which is why it shows up in the commit)
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|
|
111/58 |
Mathlib/Logic/Basic.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Order/Basic.lean,Mathlib/Order/Defs/PartialOrder.lean |
4 |
3 |
['felixpernegger', 'github-actions', 'leanprover-radar'] |
nobody |
none |
3-6512 3 days ago |
3-9587 3 days ago |
3-9237 3 days |
| 40700 |
YaelDillies author:YaelDillies |
feat(FieldTheory): generalise `Separable.of_algHom` |
From BrauerGroup
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|
t-algebra label:t-algebra$ |
12/19 |
Mathlib/FieldTheory/Separable.lean |
1 |
2 |
['Multramate', 'YaelDillies', 'github-actions'] |
nobody |
none |
3-6114 3 days ago |
25-41146 25 days ago |
25-40796 25 days |
| 41135 |
martinwintermath author:martinwintermath |
feat(Algebra/Order/Nonneg): generalize Nonneg/Field.lean to `DivisionSemiring` |
Generalizes the content of Nonneg/Field.lean from `Semifield` to `DivisionSemiring`
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|
t-algebra label:t-algebra$ |
15/5 |
Mathlib/Algebra/Order/Nonneg/Field.lean |
1 |
5 |
['github-actions', 'leanprover-radar', 'themathqueen'] |
nobody |
none |
3-5197 3 days ago |
13-70315 13 days ago |
13-69965 13 days |
| 41537 |
Mathias-Stout author:Mathias-Stout |
feat(RingTheory/TwoSidedIdeal/Lattice): add lemmas on two-sided ideals |
We add three lemmas on two-sided ideals.
These are analogues of existing lemmas of `Submodule` with the same names.
This prepares a follow-up PR proving that quaternions are central simple.
Co-authored-by: Justus Springer [justusspringer@gmx.de](mailto:justusspringer@gmx.de)
---
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|
t-ring-theory
new-contributor
|
13/0 |
Mathlib/RingTheory/TwoSidedIdeal/Lattice.lean |
1 |
5 |
['Whysoserioushah', 'github-actions', 'kbuzzard'] |
nobody |
1 |
3-3846 3 days ago |
3-6289 3 days ago |
3-13716 3 days |
| 41542 |
tb65536 author:tb65536 |
refactor(AlgebraicGeometry/Sites/Small): golf and remove defeqs |
This PR golfs and removes some defeqs. Some proofs with the help of Claude, with further golfing by myself.
---
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|
t-category-theory
tech debt
LLM-generated
|
59/135 |
Mathlib/AlgebraicGeometry/Sites/Small.lean,Mathlib/CategoryTheory/Sites/Over.lean |
2 |
1 |
['github-actions'] |
nobody |
none |
3-2057 3 days ago |
3-2112 3 days ago |
3-1764 3 days |
| 41438 |
SnirBroshi author:SnirBroshi |
doc(Matrix): mention bundled forms in docstrings |
Followup to https://github.com/leanprover-community/mathlib4/pull/39123#issuecomment-4798925362
---
As in `Matrix.map`s docstring, the convention is "This is available in bundled forms as" and then listing bundled versions in asterisk bullet-points.
If there's only one item I went with "This is available in a bundled form as X".
For `Matrix.entry{AddHom/AddMonoidHom/LinearMap}` none of them is the "main" definition, so I added "see also" for each of them listing the other two.
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|
t-algebra label:t-algebra$ |
88/15 |
Mathlib/Data/Matrix/Basic.lean,Mathlib/Data/Matrix/Composition.lean,Mathlib/Data/Matrix/Diagonal.lean,Mathlib/Data/Matrix/Mul.lean,Mathlib/LinearAlgebra/Matrix/ConjTranspose.lean,Mathlib/LinearAlgebra/Matrix/Defs.lean,Mathlib/LinearAlgebra/Matrix/Determinant/Basic.lean,Mathlib/LinearAlgebra/Matrix/Permutation.lean |
8 |
6 |
['eric-wieser', 'github-actions', 'mathlib-splicebot', 'themathqueen'] |
nobody |
none |
3-1706 3 days ago |
5-42020 5 days ago |
5-41670 5 days |
| 41548 |
JovanGerb author:JovanGerb |
chore: use `to_dual` for `DedekindCut` |
This PR uses `to_dual` in DedekindCut.
To make this work, we add a shortcut `PartialOrder` instance. We also add some specialized `DedekindCut` theorems, from the more general `Concept` theorems.
Two `gcongr` tags are also added on appropriate lemmas.
---
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|
t-order |
35/18 |
Mathlib/Order/Completion.lean |
1 |
1 |
['github-actions'] |
nobody |
none |
3-642 3 days ago |
3-1375 3 days ago |
3-1025 3 days |
| Number |
Author |
Title |
Description |
Labels |
+/- |
Modified files (first 100) |
📝 |
💬 |
All users who commented or reviewed |
Assignee(s) |
Updated |
Last status change |
total time in review |
| 13791 |
digama0 author:digama0 |
refactor: Primrec and Partrec |
General cleanup of the `Primrec` and `Partrec` files, to better adjust to lean 4 things. The main user-visible change is that `Primrec₂` is no longer a `def` but an `abbrev`, because it was causing inference issues in lean 4. I also removed all the nonterminal `simp`s in `PartrecCode.lean`.
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|
merge-conflict
t-computability
tech debt
|
585/778 |
Mathlib/Computability/Ackermann.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/Primrec.lean |
5 |
2 |
['github-actions', 'grunweg'] |
nobody |
692-79844 1 year ago |
756-69430 756 days ago |
1-84718 1 day |
| 15448 |
urkud author:urkud |
chore(*): deprecate `Option.elim'` |
Use `Option.elim` instead.
---
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[](https://gitpod.io/from-referrer/) |
merge-conflict
awaiting-author
tech debt
|
54/50 |
Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/Calculus/LagrangeMultipliers.lean,Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/Computability/TMToPartrec.lean,Mathlib/Data/Option/Defs.lean,Mathlib/LinearAlgebra/Basis.lean,Mathlib/Logic/Embedding/Set.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/MeasureTheory/OuterMeasure/Induced.lean,Mathlib/NumberTheory/Dioph.lean,Mathlib/Topology/Compactness/Paracompact.lean,Mathlib/Topology/LocallyFinite.lean |
17 |
12 |
['Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'grunweg', 'urkud'] |
nobody |
692-3409 1 year ago |
701-49571 701 days ago |
7-18420 7 days |
| 12879 |
grunweg author:grunweg |
feat: port ge_or_gt linter from mathlib3 |
Code works and is essentially green: next step is to split up into separate PRs.
Feedback welcome on whether:
- all the test changes are good, or I should simply allow it in more cases
- if calc blocks need to be explicitly exempt
---
- [ ] depends on: #12933
- [ ] depends on: #12934
- [ ] depends on: #12931
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|
merge-conflict
t-linter
tech debt
blocked-by-other-PR
|
736/319 |
Archive/Imo/Imo1960Q1.lean,Archive/Imo/Imo1962Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo2001Q2.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2008Q4.lean,Archive/Imo/Imo2011Q5.lean,Archive/Imo/Imo2019Q4.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/BirthdayProblem.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib.lean,Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/Order/CauSeq/BigOperators.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Star/CHSH.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Analysis/Normed/Group/ControlledClosure.lean,Mathlib/Analysis/NormedSpace/MStructure.lean,Mathlib/Analysis/SpecialFunctions/Log/Base.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Computability/AkraBazzi/GrowsPolynomially.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/FP/Basic.lean,Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Int/Lemmas.lean,Mathlib/Data/Nat/Dist.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Nat/Parity.lean,Mathlib/Data/Nat/Upto.lean,Mathlib/Data/Ordmap/Ordset.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/UInt.lean,Mathlib/GroupTheory/Coxeter/Length.lean,Mathlib/MeasureTheory/Constructions/Polish.lean,Mathlib/MeasureTheory/Covering/Besicovitch.lean,Mathlib/MeasureTheory/Covering/Vitali.lean,Mathlib/MeasureTheory/Covering/VitaliFamily.lean,Mathlib/MeasureTheory/Integral/Layercake.lean,Mathlib/NumberTheory/LegendreSymbol/JacobiSymbol.lean,Mathlib/NumberTheory/Padics/Hensel.lean,Mathlib/NumberTheory/Padics/PadicNorm.lean,Mathlib/NumberTheory/PellMatiyasevic.lean,Mathlib/NumberTheory/Rayleigh.lean,Mathlib/Order/Filter/AtTopBot.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/RingTheory/Adjoin/Basic.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/SetTheory/Ordinal/Notation.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CancelDenoms/Core.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/IntervalCases.lean,Mathlib/Tactic/Linarith/Datatypes.lean,Mathlib/Tactic/Linarith/Lemmas.lean,Mathlib/Tactic/Linarith/Oracle/FourierMotzkin.lean,Mathlib/Tactic/Linter/GeOrGt.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Tactic/NormNum/GCD.lean,Mathlib/Tactic/NormNum/Inv.lean,Mathlib/Tactic/Ring/Basic.lean,Mathlib/Topology/Category/Profinite/Nobeling.lean,Mathlib/Topology/ContinuousFunction/Bounded.lean,Mathlib/Topology/MetricSpace/CauSeqFilter.lean,Mathlib/Topology/MetricSpace/Cauchy.lean,Mathlib/Topology/MetricSpace/Closeds.lean,Mathlib/Topology/Sequences.lean,scripts/lint-style.py,test/Explode.lean,test/GCongr/inequalities.lean,test/GeOrGt.lean,test/LibrarySearch/IsCompact.lean,test/LibrarySearch/basic.lean,test/Recall.lean,test/Rify.lean,test/Use.lean,test/cancel_denoms.lean,test/congr.lean,test/delabLinearIndependent.lean,test/delaborators.lean,test/interval_cases.lean,test/linarith.lean |
109 |
4 |
['github-actions', 'grunweg', 'urkud'] |
nobody |
166-78017 5 months ago |
787-79011 787 days ago |
0-15256 4 hours |
| 24100 |
eric-wieser author:eric-wieser |
feat: restore some explicit binders from Lean 3 |
Part of #24099
---
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|
merge-conflict
awaiting-author
tech debt
t-topology
t-algebra
label:t-algebra$ |
39/42 |
Mathlib/Data/FinEnum.lean,Mathlib/FieldTheory/Galois/Profinite.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/Compactness/CompactlyGeneratedSpace.lean,Mathlib/Topology/MetricSpace/IsometricSMul.lean,Mathlib/Topology/Metrizable/CompletelyMetrizable.lean,Mathlib/Topology/Metrizable/Uniformity.lean,Mathlib/Topology/Order.lean,Mathlib/Topology/Order/LowerUpperTopology.lean,Mathlib/Topology/UniformSpace/UniformEmbedding.lean |
10 |
3 |
['github-actions', 'grunweg', 'leanprover-community-bot-assistant'] |
nobody |
161-74082 5 months ago |
452-65685 452 days ago |
0-954 15 minutes |
| 39386 |
MichaelStollBayreuth author:MichaelStollBayreuth |
chore: shake --keep-implied --keep-prefix --fix |
---
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WIP
tech debt
large-import
merge-conflict
|
113346/9457 |
Mathlib/Algebra/AddConstMap/Basic.lean,Mathlib/Algebra/AddConstMap/Equiv.lean,Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/AffineMonoid/Basic.lean,Mathlib/Algebra/AffineMonoid/Embedding.lean,Mathlib/Algebra/AffineMonoid/Irreducible.lean,Mathlib/Algebra/AffineMonoid/UniqueSums.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Epi.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Field.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Hom/Rat.lean,Mathlib/Algebra/Algebra/IsSimpleRing.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Opposite.lean,Mathlib/Algebra/Algebra/Pi.lean,Mathlib/Algebra/Algebra/Prod.lean,Mathlib/Algebra/Algebra/Rat.lean,Mathlib/Algebra/Algebra/RestrictScalars.lean,Mathlib/Algebra/Algebra/Shrink.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Spectrum/Pi.lean,Mathlib/Algebra/Algebra/Spectrum/Quasispectrum.lean,Mathlib/Algebra/Algebra/StrictPositivity.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Centralizer.lean,Mathlib/Algebra/Algebra/Subalgebra/Directed.lean,Mathlib/Algebra/Algebra/Subalgebra/IsSimpleOrder.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/Subalgebra/Matrix.lean,Mathlib/Algebra/Algebra/Subalgebra/MulOpposite.lean,Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Order.lean,Mathlib/Algebra/Algebra/Subalgebra/Pi.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/Algebra/Subalgebra/Prod.lean,Mathlib/Algebra/Algebra/Subalgebra/Rank.lean,Mathlib/Algebra/Algebra/Subalgebra/Tower.lean,Mathlib/Algebra/Algebra/Subalgebra/Unitization.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Algebra/TransferInstance.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/AlgebraicCard.lean,Mathlib/Algebra/Azumaya/Basic.lean,Mathlib/Algebra/Azumaya/Defs.lean,Mathlib/Algebra/Azumaya/Matrix.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Balance.lean,Mathlib/Algebra/BigOperators/Expect.lean,Mathlib/Algebra/BigOperators/Field.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/BigOperators/Finsupp/Fin.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Gaps.lean,Mathlib/Algebra/BigOperators/Group/Finset/Indicator.lean,Mathlib/Algebra/BigOperators/Group/Finset/Interval.lean,Mathlib/Algebra/BigOperators/Group/Finset/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Finset/Pi.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/Group/Finset/Powerset.lean,Mathlib/Algebra/BigOperators/Group/Finset/Preimage.lean,Mathlib/Algebra/BigOperators/Group/Finset/Sigma.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Defs.lean,Mathlib/Algebra/BigOperators/GroupWithZero/Action.lean,Mathlib/Algebra/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/BigOperators/ModEq.lean,Mathlib/Algebra/BigOperators/Module.lean,Mathlib/Algebra/BigOperators/NatAntidiagonal.lean,Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/BigOperators/Ring/Multiset.lean,Mathlib/Algebra/BigOperators/Ring/Nat.lean,Mathlib/Algebra/BigOperators/RingEquiv.lean,Mathlib/Algebra/BigOperators/Sym.lean,Mathlib/Algebra/BigOperators/WithTop.lean,Mathlib/Algebra/BrauerGroup/Defs.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/AlgCat/Monoidal.lean,Mathlib/Algebra/Category/AlgCat/Symmetric.lean,Mathlib/Algebra/Category/BialgCat/Basic.lean,Mathlib/Algebra/Category/BialgCat/Monoidal.lean,Mathlib/Algebra/Category/BoolRing.lean,Mathlib/Algebra/Category/CoalgCat/Basic.lean |
7976 |
3 |
['MichaelStollBayreuth', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
58-7589 1 month ago |
59-1421 59 days ago |
0-2 2 seconds |
| 39499 |
MichaelStollBayreuth author:MichaelStollBayreuth |
chore: run `lake shake` successively from the leaves |
We do the experiment from #39481 in reverse order: starting from the leaves, run `lake shake --force --only <module> --fix` and then `lake build` until something breaks. Then fix the problems manually and continue.
---
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|
WIP
tech debt
|
8057/0 |
MS_test/topsort.txt |
1 |
2 |
['MichaelStollBayreuth', 'github-actions'] |
nobody |
56-29203 1 month ago |
56-41962 56 days ago |
0-1 1 second |
| 39481 |
MichaelStollBayreuth author:MichaelStollBayreuth |
chore: run `lake shake` iteratively and fix problems |
This adds `-- shake: keep-all` to all modules under `Mathlib.Lean`, `Mathlib.Tactic` and `Mathlib.Util`.
Then it goes through the remaining modules in topological order (according to the list in `MS_test/topsort3.txt`) and for each of them, runs `lake shake --force <name> --only <name> --fix`, followed by `lake build <name>`. If there is no error, the changes are commited. Otherwise, the problems are fixed manually; then the changes are committed.
This has been done for the first ~400 modules in the list. 38 of them required manual fixes; they are listed in `MS_test/after_shake_fixes.txt`.
We note that the import stats bot claims that the number of imports actually *increases* in most files, which somehow runs counter expectations...
Discussion: [#mathlib4 > shake without --add-public @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/shake.20without.20--add-public/near/595349216)
---
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|
WIP
tech debt
large-import
merge-conflict
|
9178/858 |
MS_test/after_shake_fixes.txt,MS_test/topsort3.txt,Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/CharZero/Defs.lean,Mathlib/Algebra/ContinuedFractions/Basic.lean,Mathlib/Algebra/Divisibility/Basic.lean,Mathlib/Algebra/Divisibility/Hom.lean,Mathlib/Algebra/Divisibility/Prod.lean,Mathlib/Algebra/Divisibility/Units.lean,Mathlib/Algebra/EuclideanDomain/Field.lean,Mathlib/Algebra/Expr.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/Field/IsField.lean,Mathlib/Algebra/Free.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/FreeMonoid/Count.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/Faithful.lean,Mathlib/Algebra/Group/Action/Option.lean,Mathlib/Algebra/Group/Action/Pretransitive.lean,Mathlib/Algebra/Group/Action/Sum.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/Commute/Basic.lean,Mathlib/Algebra/Group/Commute/Units.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Algebra/Group/Equiv/TypeTags.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Hom/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Hom/End.lean,Mathlib/Algebra/Group/Hom/Instances.lean,Mathlib/Algebra/Group/Idempotent.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/Group/Int/Units.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Invertible/Defs.lean,Mathlib/Algebra/Group/Irreducible/Defs.lean,Mathlib/Algebra/Group/ModEq.lean,Mathlib/Algebra/Group/Nat/Hom.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/Group/Pi/Units.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/Semiconj/Basic.lean,Mathlib/Algebra/Group/Semiconj/Defs.lean,Mathlib/Algebra/Group/Semiconj/Units.lean,Mathlib/Algebra/Group/Torsion.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/Group/WithOne/Basic.lean,Mathlib/Algebra/Group/WithOne/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Commute.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Divisibility.lean,Mathlib/Algebra/GroupWithZero/Hom.lean,Mathlib/Algebra/GroupWithZero/Idempotent.lean,Mathlib/Algebra/GroupWithZero/InjSurj.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/NeZero.lean,Mathlib/Algebra/GroupWithZero/Opposite.lean,Mathlib/Algebra/GroupWithZero/Prod.lean,Mathlib/Algebra/GroupWithZero/Regular.lean,Mathlib/Algebra/GroupWithZero/Semiconj.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/Algebra/HierarchyDesign.lean,Mathlib/Algebra/Homology/ComplexShape.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/NeZero.lean,Mathlib/Algebra/Notation.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Algebra/Notation/Lemmas.lean,Mathlib/Algebra/Notation/Pi/Basic.lean,Mathlib/Algebra/Notation/Pi/Defs.lean,Mathlib/Algebra/Notation/Prod.lean,Mathlib/Algebra/Opposites.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Prime/Defs.lean,Mathlib/Algebra/Quotient.lean,Mathlib/Algebra/Regular/Basic.lean,Mathlib/Algebra/Regular/Defs.lean,Mathlib/Algebra/Ring/Basic.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/Ring/GrindInstances.lean,Mathlib/Algebra/Ring/Hom/Defs.lean,Mathlib/Algebra/Ring/Hom/InjSurj.lean,Mathlib/Algebra/Ring/Idempotent.lean,Mathlib/Algebra/Ring/InjSurj.lean,Mathlib/Algebra/Ring/Int/Defs.lean,Mathlib/Algebra/Ring/Invertible.lean,Mathlib/Algebra/Ring/MinimalAxioms.lean |
690 |
2 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
55-67732 1 month ago |
unknown |
0-0 0 seconds |
| 38990 |
Vierkantor author:Vierkantor |
chore(Algebra/DirectSum): workaround for `backward.inferInstanceAs` |
This PR works around a `backward.inferInstanceAs` compatibility flag introduced by identifying `DirectSum` with `DFinsupp` in our definitions. We introduce a new dsimp lemma `funLike_eq` that transfers the `FunLike` instances, and now we can use `DirectSum`'s `FunLike` instance, instead of the custom `CoeFun` instance. I unsqueezed a few `simp`s, which all ran pretty much instant on my machine so it shouldn't cause much slowdown. Also we fix two porting notes.
This is not a great approach, but it seems the least painful for the short term. The alternative would be to strictly enforce the defeq barrier between `DirectSum` and `DFinsupp`, which would mean a substantial rewrite of this corner of Mathlib. We can't make `DirectSum` an `@[implicit_reducible]`, because we need different multiplication on it than `DFinsupp` has.
---
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|
t-algebra
tech debt
t-ring-theory
awaiting-author
merge-conflict
label:t-algebra$ |
36/38 |
Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/DirectSum/Ring.lean,Mathlib/Algebra/Lie/DirectSum.lean,Mathlib/Algebra/Order/Module/HahnEmbedding.lean,Mathlib/Analysis/InnerProductSpace/Projection/FiniteDimensional.lean,Mathlib/Analysis/InnerProductSpace/Subspace.lean,Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean,Mathlib/RingTheory/Spectrum/Prime/RingHom.lean |
9 |
4 |
['JovanGerb', 'Vierkantor', 'github-actions', 'mathlib-merge-conflicts'] |
JovanGerb assignee:JovanGerb |
50-2812 1 month ago |
59-14052 59 days ago |
8-19465 8 days |
| 40404 |
felixpernegger author:felixpernegger |
chore(MeasureTheory/Constructions/BorelSpace): remove some `erw`'s |
Extracted from #40348
---
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|
tech debt
t-order
t-measure-probability
|
27/6 |
Mathlib/MeasureTheory/Constructions/BorelSpace/Order.lean,Mathlib/Order/Interval/Set/Basic.lean,Mathlib/Order/OrderDual.lean |
3 |
1 |
['github-actions'] |
nobody |
33-24646 1 month ago |
33-27944 33 days ago |
33-27594 33 days |
| 39769 |
chenson2018 author:chenson2018 |
chore(Topology): 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-topology
tech debt
merge-conflict
|
35/17 |
Mathlib/Topology/Compactness/CountablyCompact.lean,Mathlib/Topology/EMetricSpace/BoundedVariation.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean,Mathlib/Topology/Order/Basic.lean,Mathlib/Topology/Order/IsLUB.lean,Mathlib/Topology/Order/WithTop.lean,Mathlib/Topology/Path.lean,Mathlib/Topology/Sets/VietorisTopology.lean,Mathlib/Topology/Sheaves/Flasque.lean |
9 |
2 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
30-73709 1 month ago |
30-73709 30 days ago |
18-36384 18 days |
| 39983 |
grunweg author:grunweg |
chore: remove `Dynamics` dependency from `Data` |
A handful of files remain, which might need more thought. (For instance, some remaining `Data/Matrix` files would need to be *merged* with their `LinearAlgebra/Matrix` file, which is more effort than a mere rename.)
---
- [ ] depends on: #39984
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WIP
tech debt
|
1/1 |
Mathlib/Tactic/Linter/DirectoryDependency.lean |
1 |
3 |
['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
25-30739 25 days ago |
45-3540 45 days ago |
0-1 1 second |
| 40310 |
felixpernegger author:felixpernegger |
chore(Algebra): remove an `erw` |
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|
t-algebra
tech debt
label:t-algebra$ |
3/4 |
Mathlib/Algebra/Ring/Divisibility/Basic.lean |
1 |
10 |
['felixpernegger', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-bors'] |
nobody |
23-16765 23 days ago |
23-19295 23 days ago |
24-45532 24 days |
| 40431 |
sgouezel author:sgouezel |
chore: fix non-reducible diamond in C^* algebras |
The following fails before the PR, succeeds after it
```
example : ((instCStarAlgebraSubtypeMemStarSubalgebraComplexElemental
x).toAlgebra : Algebra ℂ ↥(StarAlgebra.elemental ℂ x)) =
(StarAlgebra.elemental ℂ x).algebra := by
with_reducible_and_instances rfl
```
---
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|
t-algebra
tech debt
label:t-algebra$ |
1/0 |
Mathlib/Algebra/Ring/Subsemiring/Basic.lean |
1 |
10 |
['eric-wieser', 'github-actions', 'grunweg', 'leanprover-radar', 'mathlib-bors', 'sgouezel', 'themathqueen'] |
nobody |
16-25711 16 days ago |
32-80679 32 days ago |
32-80360 32 days |
| 40915 |
felixpernegger author:felixpernegger |
chore: remove (all) instances of `simp; infer_instance` |
Removes some exceptions for `linter.flexible`; these are all occurences of this pattern (including multi-line).
See also the reviews at #40883
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|
awaiting-author
tech debt
|
9/11 |
Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean |
2 |
4 |
['eric-wieser', 'github-actions', 'themathqueen'] |
nobody |
14-2705 14 days ago |
17-7038 17 days ago |
2-59119 2 days |
| 40874 |
felixpernegger author:felixpernegger |
chore(AlgebraicGeometry/FunctionField): golf / defEq abuse |
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|
t-algebraic-geometry
awaiting-author
tech debt
|
12/23 |
Mathlib/AlgebraicGeometry/FunctionField.lean |
1 |
6 |
['chrisflav', 'felixpernegger', 'github-actions'] |
dagurtomas assignee:dagurtomas |
14-2594 14 days ago |
18-2422 18 days ago |
2-71737 2 days |
| 41110 |
felixpernegger author:felixpernegger |
chore: remove remaining `warning.simp.varHead` exceptions |
These are all who remain (tech debt)
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|
t-category-theory
tech debt
|
25/9 |
Mathlib/CategoryTheory/Sites/Precoverage.lean |
1 |
2 |
['felixpernegger', 'github-actions', 'jkandel1'] |
nobody |
13-15190 13 days ago |
14-82390 14 days ago |
14-82040 14 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'] |
JovanGerb assignee:JovanGerb |
12-63994 12 days ago |
26-62710 26 days ago |
26-62378 26 days |
| 40394 |
mathlib-splicebot author:mathlib-splicebot |
chore(MeasureTheory/Measure/Haar/InnerProductSpace: remove an `erw` |
Extracted from #40348. |
t-measure-probability
tech debt
|
7/6 |
Mathlib/MeasureTheory/Measure/Haar/InnerProductSpace.lean |
1 |
4 |
['felixpernegger', 'github-actions'] |
EtienneC30 assignee:EtienneC30 |
9-63987 9 days ago |
33-33402 33 days ago |
33-33052 33 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
|
30/15 |
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 |
7 |
11 |
['JovanGerb', 'github-actions', 'grunweg', 'leanprover-radar', 'riccardobrasca'] |
nobody |
8-20898 8 days ago |
19-18795 19 days ago |
19-19252 19 days |
| 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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|
t-category-theory
tech debt
|
186/6 |
Mathlib.lean,Mathlib/CategoryTheory/Presentable/Basic.lean,Mathlib/CategoryTheory/Presentable/CardinalPure.lean |
3 |
16 |
['github-actions', 'joelriou', 'smorel394'] |
nobody |
7-20726 7 days ago |
8-22643 8 days ago |
11-76376 11 days |
| 41136 |
mathlib-nolints author:mathlib-nolints |
chore: remove unnecessary set_option lines |
I removed 110 unnecessary `set_option` line(s) across 70 file(s).
---
[workflow run for this PR](https://github.com/leanprover-community/mathlib4/actions/runs/28758901168) |
auto-merge-after-CI
tech debt
|
0/110 |
Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/TensorAlgebra.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Submodule.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Quasicoherent.lean,Mathlib/Algebra/Lie/Loop.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/MvPolynomial/Derivation.lean,Mathlib/Algebra/MvPolynomial/Division.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Supported.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/HasseDeriv.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Fourier.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/InnerProductSpace/TwoDim.lean,Mathlib/Analysis/Matrix/Order.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Inverse.lean,Mathlib/CategoryTheory/Limits/IsLimit.lean,Mathlib/CategoryTheory/Limits/Shapes/Multiequalizer.lean,Mathlib/CategoryTheory/Limits/Types/Pushouts.lean,Mathlib/CategoryTheory/MorphismProperty/Limits.lean,Mathlib/Combinatorics/Hall/Finite.lean,Mathlib/Data/DFinsupp/Lex.lean,Mathlib/FieldTheory/Differential/Basic.lean,Mathlib/FieldTheory/Finite/Polynomial.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/Geometry/Manifold/VectorBundle/Riemannian.lean,Mathlib/LinearAlgebra/Basis/Defs.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Basic.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Coeff.lean,Mathlib/LinearAlgebra/QuadraticForm/TensorProduct.lean,Mathlib/LinearAlgebra/SymmetricAlgebra/Basis.lean,Mathlib/MeasureTheory/Measure/CharacteristicFunction/TaylorExpansion.lean,Mathlib/NumberTheory/BernoulliPolynomials.lean,Mathlib/Order/PiLex.lean,Mathlib/Probability/Distributions/Gaussian/Multivariate.lean,Mathlib/RepresentationTheory/Basic.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/Functoriality.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/Functoriality.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/LowDegree.lean,Mathlib/RepresentationTheory/Invariants.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/Derivation/MapCoeffs.lean,Mathlib/RingTheory/Etale/QuasiFinite.lean,Mathlib/RingTheory/Filtration.lean,Mathlib/RingTheory/HopfAlgebra/MonoidAlgebra.lean,Mathlib/RingTheory/MvPolynomial/Basic.lean,Mathlib/RingTheory/MvPolynomial/EulerIdentity.lean,Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,Mathlib/RingTheory/MvPolynomial/Ideal.lean,Mathlib/RingTheory/MvPolynomial/IrreducibleQuadratic.lean,Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/Polynomial/Opposites.lean,Mathlib/RingTheory/Polynomial/ShiftedLegendre.lean,Mathlib/RingTheory/Polynomial/UniversalFactorizationRing.lean,Mathlib/RingTheory/Spectrum/Prime/ChevalleyComplexity.lean,Mathlib/RingTheory/TensorProduct/Maps.lean,Mathlib/RingTheory/TensorProduct/Quotient.lean,Mathlib/Topology/Sets/Closeds.lean,Mathlib/Topology/Sheaves/Module.lean,Mathlib/Topology/VectorBundle/Riemannian.lean |
70 |
2 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
6-62415 6 days ago |
13-62516 13 days ago |
0-1 1 second |
| 38957 |
wwylele author:wwylele |
chore(GroupTheory/DivisibleHull): remove `backward.privateInPublic` |
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|
tech debt
t-group-theory
|
5/12 |
Mathlib/GroupTheory/DivisibleHull.lean |
1 |
13 |
['Komyyy', 'github-actions', 'grunweg', 'jcommelin', 'wwylele'] |
nobody |
6-16035 6 days ago |
47-61935 47 days ago |
61-53535 61 days |
| 41442 |
tb65536 author:tb65536 |
chore(CategoryTheory/Comma/Over/OverClass): refactor `OverClass` |
---
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|
t-algebraic-geometry
t-category-theory
awaiting-CI
tech debt
|
198/207 |
Mathlib/AlgebraicGeometry/Cover/Over.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/AlgebraicGeometry/Morphisms/ClosedImmersion.lean,Mathlib/AlgebraicGeometry/Over.lean,Mathlib/AlgebraicGeometry/Pullbacks.lean,Mathlib/AlgebraicGeometry/ResidueField.lean,Mathlib/AlgebraicGeometry/Restrict.lean,Mathlib/AlgebraicGeometry/Sites/Affine.lean,Mathlib/AlgebraicGeometry/Sites/Etale.lean,Mathlib/AlgebraicGeometry/Sites/Small.lean,Mathlib/AlgebraicGeometry/Stalk.lean,Mathlib/CategoryTheory/Comma/Over/OverClass.lean |
12 |
1 |
['github-actions'] |
nobody |
5-25282 5 days ago |
5-25367 5 days ago |
0-1 1 second |
| 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$ |
31/87 |
Mathlib/Algebra/AffineMonoid/Irreducible.lean,Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/Horn.lean,Mathlib/Combinatorics/Enumerative/DyckWord.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Exponential.lean,scripts/nolints_prime_decls.txt |
8 |
1 |
['github-actions'] |
nobody |
4-76991 4 days ago |
4-81442 4 days ago |
5-41 5 days |
| 40920 |
felixpernegger author:felixpernegger |
chore(Topology/Separation): remove defEq abuse |
---
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|
t-topology
tech debt
awaiting-author
|
6/4 |
Mathlib/Topology/Separation/Basic.lean,Mathlib/Topology/Separation/CompletelyRegular.lean |
2 |
9 |
['chenson2018', 'felixpernegger', 'github-actions', 'grunweg', 'j-loreaux'] |
nobody |
4-57569 4 days ago |
4-57569 4 days ago |
14-82413 14 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.
---
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|
tech debt
t-algebra
label:t-algebra$ |
244/245 |
Mathlib/Algebra/MonoidAlgebra/Defs.lean,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 |
36 |
4 |
['eric-wieser', 'github-actions'] |
nobody |
4-21876 4 days ago |
4-23934 4 days ago |
4-26632 4 days |
| 40402 |
felixpernegger author:felixpernegger |
chore(MeasureTheory/Integral): remove an `erw` |
Extracted from #40348. Note we cannot just do `simp_all [...]`
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|
t-measure-probability
tech debt
awaiting-author
|
3/2 |
Mathlib/MeasureTheory/Integral/RieszMarkovKakutani/NNReal.lean |
1 |
5 |
['Multramate', 'felixpernegger', 'github-actions', 'mcdoll'] |
EtienneC30 assignee:EtienneC30 |
3-17894 3 days ago |
3-21487 3 days ago |
30-7330 30 days |
| 41542 |
tb65536 author:tb65536 |
refactor(AlgebraicGeometry/Sites/Small): golf and remove defeqs |
This PR golfs and removes some defeqs. Some proofs with the help of Claude, with further golfing by myself.
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|
t-category-theory
tech debt
LLM-generated
|
59/135 |
Mathlib/AlgebraicGeometry/Sites/Small.lean,Mathlib/CategoryTheory/Sites/Over.lean |
2 |
1 |
['github-actions'] |
nobody |
3-2057 3 days ago |
3-2112 3 days ago |
3-1764 3 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 |
3 |
['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
2-85825 2 days ago |
35-83753 35 days ago |
35-84926 35 days |
| 38039 |
themathqueen author:themathqueen |
chore(Topology): `UniformSpace.Completion` renames for morphisms |
This PR renames the following `UniformSpace.Completion` morphisms.
The `UniformSpace` namespace remains for ring morphisms and functions so that we're clear which completion we're talking about. For isometries, `UniformEquiv`s, `NormedAddGroupHom`s, there's no need for the `UniformSpace` namespace.
For the isometry definitions, we used `Isometry.ringHom{FromCompletion, Completion}` instead of `RingHom.Isometry.{fromCompletion, completion}` so that it won't clash with the function versions (`Isometry.{fromCompletion, completion}`).
RingHom
- [ ] `UniformSpace.Completion.mapRingHom` -> `UniformSpace.RingHom.toCompletion`
- [ ] `UniformSpace.Completion.extensionHom` -> `UniformSpace.RingHom.fromCompletion`
RingEquiv
- [ ] `UniformSpace.Completion.mapRingEquiv` -> `UniformSpace.RingEquiv.completion`
NormedAddGroupHom
- [ ] `NormedAddGroupHom.extension` -> `NormedAddGroupHom.fromCompletion`
RingHom isometries
- [ ] `Isometry.extensionHom` -> `Isometry.ringHomFromCompletion`
- [ ] `Isometry.mapRingHom` -> `Isometry.ringHomCompletion`
isometries
- [ ] `Isometry.completion_extension` -> `Isometry.fromCompletion`
- [ ] `Isometry.completion_map` -> `Isometry.completion`
Functions
- [ ] `UniformSpace.Completion.extension` -> `UniformSpace.Function.fromCompletion`
- [ ] `UniformSpace.Completion.map` -> `UniformSpace.Function.completion`
UniformEquiv
- [ ] `UniformSpace.Completion.mapEquiv` -> `UniformEquiv.completion`
---
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See Zulip thread: [#mathlib4 > naming convention: `UniformSpace.Completion` morphisms](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/naming.20convention.3A.20.60UniformSpace.2ECompletion.60.20morphisms)
[](https://gitpod.io/from-referrer/)
|
t-topology
tech debt
|
393/233 |
Mathlib/Analysis/InnerProductSpace/Completion.lean,Mathlib/Analysis/Normed/Field/WithAbs.lean,Mathlib/Analysis/Normed/Group/Completion.lean,Mathlib/Analysis/Normed/Group/HomCompletion.lean,Mathlib/Analysis/Normed/Group/SemiNormedGrp/Completion.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/NumberField/Completion/InfinitePlace.lean,Mathlib/NumberTheory/NumberField/Completion/LiesOverInstances.lean,Mathlib/NumberTheory/Padics/Complex.lean,Mathlib/NumberTheory/Padics/HeightOneSpectrum.lean,Mathlib/NumberTheory/Padics/WithVal.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/Topology/Algebra/GroupCompletion.lean,Mathlib/Topology/Algebra/LinearMapCompletion.lean,Mathlib/Topology/Algebra/UniformMulAction.lean,Mathlib/Topology/Algebra/UniformRing.lean,Mathlib/Topology/Algebra/Valued/ValuedField.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Category/UniformSpace.lean,Mathlib/Topology/MetricSpace/Completion.lean,Mathlib/Topology/UniformSpace/Completion.lean |
22 |
6 |
['github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'themathqueen'] |
ADedecker assignee:ADedecker |
2-75398 2 days ago |
2-76979 2 days ago |
14-40243 14 days |
| 40575 |
gasparattila author:gasparattila |
chore(MeasureTheory/SetSemiring): golf some proofs |
The constructions which are defined using choice are unexposed and redefined to allow for these simplifications.
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The contents of `namespace IsSetRing` are moved near the top of the file without changes. To make reviewing easier, this move is in a separate commit.
[](https://gitpod.io/from-referrer/)
|
t-measure-probability
tech debt
|
176/283 |
Mathlib/MeasureTheory/SetSemiring.lean |
1 |
9 |
['gasparattila', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] |
RemyDegenne assignee:RemyDegenne |
2-63988 2 days ago |
5-75493 5 days ago |
28-78020 28 days |
| 41555 |
BryceT233 author:BryceT233 |
feat(Algebra/Order/Antidiagonal): connect `Finset.HasAntidiagonal` with `Filter.TendstoCofinite` |
This PR connects `Finset.HasAntidiagonal` with `Filter.TendstoCofinite` and cleans up `TendstoCofinite.lean`.
---
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- [ ] depends on: #41521
[](https://gitpod.io/from-referrer/)
|
tech debt
large-import
blocked-by-other-PR
|
69/37 |
Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Algebra/Order/Antidiag/Tendsto.lean,Mathlib/Order/Filter/TendstoCofinite.lean |
3 |
7 |
['BryceT233', 'github-actions', 'mathlib-dependent-issues', 'plp127'] |
nobody |
2-34674 2 days ago |
2-59399 2 days ago |
0-866 14 minutes |
| 41095 |
felixpernegger author:felixpernegger |
chore(Data/Vector/Basic): remove defeq abuse |
---
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[](https://gitpod.io/from-referrer/)
|
t-data
tech debt
awaiting-author
|
12/15 |
Mathlib/Data/Vector/Basic.lean |
1 |
4 |
['github-actions', 'jkandel1', 'joneugster', 'leanprover-radar'] |
joneugster assignee:joneugster |
2-33767 2 days ago |
2-33770 2 days ago |
13-16159 13 days |
| 39755 |
wwylele author:wwylele |
chore(GroupTheory): remove a defeq abuse |
---
I am not sure if this is the right change to make, so I'd like to start a discussion from this. The issue here seems to be that the simp lemma [MulAction.orbitRel.Quotient.orbit_mk](https://leanprover-community.github.io/mathlib4_docs/Mathlib/GroupTheory/GroupAction/Defs.html#MulAction.orbitRel.Quotient.orbit_mk) fired and changed the underlying type of variables in the expression, which is not defeq at instance transparency, and fails defeq check for `MulAction` ([MulAction.instElemOrbit](https://leanprover-community.github.io/mathlib4_docs/Mathlib/GroupTheory/GroupAction/Defs.html#MulAction.instElemOrbit) vs [MulAction.instElemOrbit_1](https://leanprover-community.github.io/mathlib4_docs/Mathlib/GroupTheory/GroupAction/Defs.html#MulAction.instElemOrbit_1)). The easy change here is to disable the offending simp, but it feels like a common language pitfall. Should we do either of the following instead?
- remove `MulAction.orbitRel.Quotient.orbit_mk` from default simp set
- Make the the orbit definition more transparent
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|
tech debt
t-group-theory
|
1/2 |
Mathlib/GroupTheory/GroupAction/Basic.lean |
1 |
1 |
['Multramate', 'github-actions', 'joneugster'] |
nobody |
2-32210 2 days ago |
49-85196 49 days ago |
49-84846 49 days |
| 40392 |
felixpernegger author:felixpernegger |
chore(MeasureTheory/Integral/Lebesgue/Basic): fix an `erw` |
Extracted from #40348.
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|
t-measure-probability
tech debt
awaiting-author
|
11/1 |
Mathlib/Data/ENNReal/Operations.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Basic.lean |
2 |
2 |
['github-actions', 'joneugster'] |
joneugster assignee:joneugster |
2-30753 2 days ago |
2-30753 2 days ago |
31-3253 31 days |
| 40593 |
grunweg author:grunweg |
chore(MathlibTest): fix defLemma warnings |
In all these cases, a dummy definition was declared of type True: the `defProp` linter complains that a declaration of type `True` should be a `lemma`. Instead, change to a definition with value (the natural 0).
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|
tech debt
maintainer-merge
|
5/7 |
MathlibTest/Linter/DocPrime.lean,MathlibTest/Tactic/Says/Basic.lean |
2 |
6 |
['adomani', 'github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts'] |
nobody |
2-28233 2 days ago |
9-23351 9 days ago |
20-84174 20 days |
| 41395 |
felixpernegger author:felixpernegger |
chore: remove redundant backward.privateInPublic exceptions |
Remove all `set_option backward.privateInPublic false` which are not needed, excluding MathlibTest
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|
tech debt
maintainer-merge
|
0/63 |
Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/BoolRing.lean,Mathlib/Algebra/Category/CommAlgCat/Basic.lean,Mathlib/Algebra/Category/CommBialgCat.lean,Mathlib/Algebra/Category/Grp/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Basic.lean,Mathlib/Algebra/Category/MonCat/Basic.lean,Mathlib/Algebra/Category/Ring/Basic.lean,Mathlib/Algebra/Category/Semigrp/Basic.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Subscheme.lean,Mathlib/CategoryTheory/Bicategory/InducedBicategory.lean,Mathlib/CategoryTheory/Galois/Decomposition.lean,Mathlib/CategoryTheory/Galois/EssSurj.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Internal/FunctorCategory.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/FieldTheory/CardinalEmb.lean,Mathlib/LinearAlgebra/PerfectPairing/Restrict.lean,Mathlib/Logic/Godel/GodelBetaFunction.lean,Mathlib/NumberTheory/ArithmeticFunction/Misc.lean,Mathlib/NumberTheory/LegendreSymbol/JacobiSymbol.lean,Mathlib/NumberTheory/NumberField/House.lean,Mathlib/Order/Category/BddDistLat.lean,Mathlib/Order/Category/BddLat.lean,Mathlib/Order/Category/BddOrd.lean,Mathlib/Order/Category/BoolAlg.lean,Mathlib/Order/Category/DistLat.lean,Mathlib/Order/Category/FinBddDistLat.lean,Mathlib/Order/Category/Frm.lean,Mathlib/Order/Category/HeytAlg.lean,Mathlib/Order/Category/Lat.lean,Mathlib/Order/Category/LinOrd.lean,Mathlib/Order/Category/PartOrd.lean,Mathlib/Order/Category/PartOrdEmb.lean,Mathlib/Order/Category/Preord.lean,Mathlib/Order/DirectedInverseSystem.lean,Mathlib/Order/Nucleus.lean,Mathlib/RepresentationTheory/Continuous/TopRep.lean,Mathlib/RepresentationTheory/Rep/Basic.lean,Mathlib/RingTheory/MvPowerSeries/Evaluation.lean |
42 |
14 |
['felixpernegger', 'github-actions', 'grunweg', 'joneugster', 'leanprover-radar', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-splicebot'] |
nobody |
2-28089 2 days ago |
6-16943 6 days ago |
6-16602 6 days |
| 41332 |
JovanGerb author:JovanGerb |
chore: fix many `nsmul`/`zsmul` diamonds |
This PR fixes many diamonds around `nsmul`/`zsmul` fields. The common problematic pattern is that we first define the `AddCommMonoid`/`AddCommGroup` instance, and later define the `SMul` or `Algebra` instance. But we need to define the `smul` operation first, so that it can be used to define the `nsmul` and `zsmul` operations such that there is no diamond.
These fixes are all ported from #38781 (the instance diamonds linter), and they were found after we got the `NSMul` and `ZSMul` type classes (#38036).
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|
tech debt
maintainer-merge
|
160/131 |
Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplex.lean,Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/Normed/Ring/WithAbs.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Basic.lean,Mathlib/LinearAlgebra/Quotient/Defs.lean,Mathlib/LinearAlgebra/TensorAlgebra/Basic.lean,Mathlib/NumberTheory/Cyclotomic/Basic.lean,Mathlib/RingTheory/Extension/Cotangent/Basic.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Kaehler/Basic.lean,Mathlib/Topology/Algebra/Module/Spaces/UniformConvergenceCLM.lean,Mathlib/Topology/Algebra/Module/Spaces/WeakBilin.lean,Mathlib/Topology/Algebra/Module/Spaces/WeakDual.lean,Mathlib/Topology/Algebra/UniformConvergence.lean,Mathlib/Topology/VectorBundle/Constructions.lean |
17 |
8 |
['JovanGerb', 'eric-wieser', 'github-actions', 'joneugster', 'mathlib-merge-conflicts'] |
eric-wieser and joneugster assignee:eric-wieser assignee:joneugster |
2-27329 2 days ago |
5-8995 5 days ago |
5-34303 5 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 |
3 |
['Vierkantor', 'chenson2018', 'github-actions'] |
Vierkantor assignee:Vierkantor |
2-25765 2 days ago |
48-48435 48 days ago |
48-48085 48 days |
| 40981 |
LLaurance author:LLaurance |
chore(Algebra/Ring/BooleanRing): resolve TODO on non-terminal simp |
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t-algebra
tech debt
label:t-algebra$ |
1/3 |
Mathlib/Algebra/Ring/BooleanRing.lean |
1 |
2 |
['Multramate', 'github-actions'] |
nobody |
2-24128 2 days ago |
2-24676 2 days ago |
18-16062 18 days |
| 40650 |
felixpernegger author:felixpernegger |
chore: replace (d)simp +instances with (d)simp whenever possible |
---
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|
tech debt |
6/11 |
Mathlib/Algebra/Category/CoalgCat/ComonEquivalence.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PullbackFree.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean,Mathlib/CategoryTheory/Galois/Topology.lean,Mathlib/CategoryTheory/Localization/Trifunctor.lean,Mathlib/CategoryTheory/Sites/Over.lean,Mathlib/GroupTheory/IsSubnormal.lean |
7 |
2 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
2-20936 2 days ago |
2-21533 2 days ago |
25-84741 25 days |
| 41564 |
felixpernegger author:felixpernegger |
chore: unexpose public sections with no defs |
This PR remove `@[expose]` from public sections when there are no `(irredcible_)def`'s inside the section anyways, so there is no reason to expose the section (does not make a difference).
---
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|
tech debt |
147/147 |
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/Field/Basic.lean,Mathlib/Algebra/Field/MinimalAxioms.lean,Mathlib/Algebra/Field/Opposite.lean,Mathlib/Algebra/Field/Rat.lean,Mathlib/Algebra/Field/ULift.lean,Mathlib/Algebra/Field/ZMod.lean,Mathlib/Algebra/Group/Action/Option.lean,Mathlib/Algebra/Group/Action/Sigma.lean,Mathlib/Algebra/Group/Action/Sum.lean,Mathlib/Algebra/Group/Action/Units.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/MulAction.lean,Mathlib/Algebra/HierarchyDesign.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/Pi/Defs.lean,Mathlib/Algebra/Notation/Prod.lean,Mathlib/Algebra/Order/Antidiag/Tendsto.lean,Mathlib/Algebra/Order/Archimedean/Real/Basic.lean,Mathlib/Algebra/Order/Floor/Div.lean,Mathlib/Algebra/Order/Group/Action/End.lean,Mathlib/Algebra/Order/Group/End.lean,Mathlib/Algebra/Order/Group/PosPart.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/Nonneg/Lattice.lean,Mathlib/Algebra/Order/Pi.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Ring/Commute.lean,Mathlib/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/InnerProductSpace/Coalgebra.lean,Mathlib/Analysis/Normed/Algebra/TrivSqZeroExt.lean,Mathlib/Analysis/Normed/Group/Constructions.lean,Mathlib/Analysis/Normed/Module/MStructure.lean,Mathlib/Analysis/Normed/Operator/Compact/FiniteDimension.lean,Mathlib/Analysis/ODE/DiscreteGronwall.lean,Mathlib/Analysis/ODE/ExistUnique.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/MorphismProperty/LocalClosure.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/ENat/Pow.lean,Mathlib/Data/Finsupp/Pointwise.lean,Mathlib/Data/Finsupp/PointwiseSMul.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.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/Sigma/Order.lean,Mathlib/Data/ZMod/IntUnitsPower.lean,Mathlib/GroupTheory/Congruence/Star.lean,Mathlib/GroupTheory/GroupAction/Embedding.lean,Mathlib/GroupTheory/IsPerfect.lean,Mathlib/GroupTheory/ResiduallyFinite.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Star.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/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/Padics/PadicVal/Defs.lean,Mathlib/NumberTheory/RamificationInertia/Valuation.lean,Mathlib/Order/ConditionallyCompleteLattice/Basic.lean |
147 |
6 |
['felixpernegger', 'github-actions', 'grunweg', 'themathqueen'] |
nobody |
2-17996 2 days ago |
2-26614 2 days ago |
2-26264 2 days |
| 40982 |
felixpernegger author:felixpernegger |
chore(Algebra/Category/ModuleCat/Stalk): avoid heartbeat modification |
Splitting up a `simp only` to get under the threshhold. Right now this is the only remaining heartbeat modification in mathlib.
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tech debt
t-category-theory
|
7/4 |
Mathlib/Algebra/Category/ModuleCat/Stalk.lean |
1 |
7 |
['felixpernegger', 'github-actions', 'joneugster', 'leanprover-radar'] |
joneugster assignee:joneugster |
1-71063 1 day ago |
1-71063 1 day ago |
18-8717 18 days |
| 41178 |
Parcly-Taxel author:Parcly-Taxel |
chore: delete deprecated declarations to the end of 2025 |
The automated commits were made by running
```
#clear_deprecations "2025-11-01" "2025-12-31" really
```
(I had to do this in multiple sessions because VS Code kept running out of memory.) |
tech debt
maintainer-merge
|
0/2780 |
Mathlib.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/Category/FGModuleCat/Basic.lean,Mathlib/Algebra/Category/Ring/FinitePresentation.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Algebra/Group/Action/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Indicator.lean,Mathlib/Algebra/Group/Irreducible/Indecomposable.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/Submodule/Ker.lean,Mathlib/Algebra/Module/Submodule/LinearMap.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/IsBotOne.lean,Mathlib/Algebra/Order/Module/Archimedean.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/TypeTags.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Expand.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Algebra/Polynomial/Splits.lean,Mathlib/Algebra/QuadraticAlgebra/Basic.lean,Mathlib/Algebra/QuadraticAlgebra/Defs.lean,Mathlib/Algebra/Quotient.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/Star/LinearMap.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms.lean,Mathlib/Analysis/Analytic/Binomial.lean,Mathlib/Analysis/Analytic/OfScalars.lean,Mathlib/Analysis/CStarAlgebra/Unitary/Connected.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Complex/ValueDistribution/CharacteristicFunction.lean,Mathlib/Analysis/Complex/ValueDistribution/LogCounting/Basic.lean,Mathlib/Analysis/Complex/ValueDistribution/Proximity/Basic.lean,Mathlib/Analysis/Distribution/AEEqOfIntegralContDiff.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Deriv.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Fourier.lean,Mathlib/Analysis/Distribution/TemperedDistribution.lean,Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Analysis/Fourier/FourierTransform.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/Fourier/Inversion.lean,Mathlib/Analysis/Fourier/LpSpace.lean,Mathlib/Analysis/Fourier/PoissonSummation.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/Laplacian.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/Projection/Submodule.lean,Mathlib/Analysis/InnerProductSpace/Symmetric.lean,Mathlib/Analysis/Matrix/Order.lean,Mathlib/Analysis/MellinInversion.lean,Mathlib/Analysis/Meromorphic/Basic.lean,Mathlib/Analysis/Normed/Field/Lemmas.lean,Mathlib/Analysis/Normed/Field/WithAbs.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/Normed/Operator/LinearIsometry.lean,Mathlib/Analysis/Polynomial/MahlerMeasure.lean,Mathlib/Analysis/SpecialFunctions/Gaussian/FourierTransform.lean,Mathlib/CategoryTheory/Abelian/Basic.lean,Mathlib/CategoryTheory/Abelian/SerreClass/Bousfield.lean,Mathlib/CategoryTheory/EffectiveEpi/Basic.lean,Mathlib/CategoryTheory/Functor/KanExtension/DenseAt.lean,Mathlib/CategoryTheory/Groupoid.lean,Mathlib/CategoryTheory/Limits/ExactFunctor.lean,Mathlib/CategoryTheory/Limits/Shapes/Multiequalizer.lean,Mathlib/CategoryTheory/Limits/Shapes/RegularMono.lean,Mathlib/CategoryTheory/Localization/Bousfield.lean,Mathlib/CategoryTheory/Localization/DerivabilityStructure/PointwiseRightDerived.lean,Mathlib/CategoryTheory/Localization/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Grp.lean,Mathlib/CategoryTheory/Monoidal/Closed/Cartesian.lean,Mathlib/CategoryTheory/Monoidal/CommGrp_.lean,Mathlib/CategoryTheory/Monoidal/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/Grp.lean,Mathlib/CategoryTheory/Monoidal/OfHasFiniteProducts.lean,Mathlib/CategoryTheory/Monoidal/Subcategory.lean,Mathlib/CategoryTheory/ObjectProperty/FullSubcategory.lean,Mathlib/CategoryTheory/Preadditive/AdditiveFunctor.lean,Mathlib/CategoryTheory/Presentable/OrthogonalReflection.lean,Mathlib/CategoryTheory/Quotient.lean |
257 |
15 |
['Parcly-Taxel', 'felixpernegger', 'github-actions', 'joneugster', 'mathlib-merge-conflicts'] |
joneugster assignee:joneugster |
1-26386 1 day ago |
2-28264 2 days ago |
11-67745 11 days |
| 40940 |
JovanGerb author:JovanGerb |
feat(CategoryTheory/Comma/StructuredArrow): use `to_dual` |
This PR generates declarations about `CostructuredArrow` from those about `StructuredArrow` using `to_dual`.
This PR deprecates `hom_eq_iff`` in favour of `ext_iff`/`hom_ext_iff`.
This PR also removes the bad `Category` instance that `CostructuredArrow` had, which caused dot notation on arrows to not work correctly. This lets us clean up some later proofs.
Some missing prerequisites: tagging `eqToHom`, tagging more of `Mono`/`Epi`.
---
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- [ ] depends on: #40503
[](https://gitpod.io/from-referrer/)
|
t-category-theory
WIP
tech debt
|
71/169 |
Mathlib/CategoryTheory/Comma/Basic.lean,Mathlib/CategoryTheory/Comma/StructuredArrow/Basic.lean,Mathlib/CategoryTheory/Comma/StructuredArrow/CommaMap.lean,Mathlib/CategoryTheory/Limits/ConeCategory.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Limits/Indization/ParallelPair.lean,Mathlib/Tactic/Translate/ToDual.lean,Mathlib/Topology/Category/LightProfinite/Extend.lean,Mathlib/Topology/Category/Profinite/Extend.lean |
9 |
5 |
['JovanGerb', 'github-actions', 'joelriou', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
1-10482 1 day ago |
19-29230 19 days ago |
0-465 7 minutes |
| 38931 |
FordUniver author:FordUniver |
chore(Combinatorics/SimpleGraph/Copy): replace classical `Fintype.card` with `Nat.card` |
Replaces definitions of `copyCount` and `unlabeledCopyCount` with `Nat.card` instead of `Fintype.card` as well as several `Fintype` occurrences with `Finite`. The body of `uniqueUnlabeledCopyBot` is restructured to use `Finite.injective_iff_surjective` since the `Fintype.card_congr` route no longer applies under the weakened `[Finite W]` hypothesis. Adds public `copyCount_eq_nat_card` and `unlabeledCopyCount_eq_nat_card` bridge lemmas so downstream files can characterize the counts (e.g. for `Nat.card_le_card_of_injective` bridging in `InducedCopy.lean`) without unfolding.
Co-authored-by: Malte Jackisch <45597826+MaltyBlanket@users.noreply.github.com>
---
**Step 4/5 of the `Copy` / `InducedCopy` refactor-feat stack.**
As suggested in #38631 by @SnirBroshi and @YaelDillies. I went with `Nat` over `ENat` based on Yael's preference (but I think that could easily be changed to `ENat`). Quite a bit of churn was needed as a consequence.
- [ ] depends on: #38843
Diff for the changes *just* in this PR over its predecessor: [link](https://github.com/FordUniver/mathlib4/compare/chore/copy-expose...chore/copy-nat-card) |
new-contributor
t-combinatorics
large-import
blocked-by-other-PR
tech debt
|
283/259 |
Mathlib/Combinatorics/SimpleGraph/Copy.lean |
1 |
8 |
['FordUniver', 'SnirBroshi', 'github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
0-58120 16 hours ago |
69-17863 69 days ago |
0-2006 33 minutes |
| 38631 |
FordUniver author:FordUniver |
feat(Combinatorics/SimpleGraph/InducedCopy): add `UnlabeledEmbedding`, `unlabeledEmbeddingCount` and `embeddingCount` |
Extracts the induced-containment material from `SimpleGraph/Copy.lean` into a new `SimpleGraph/InducedCopy.lean` and adds the induced analogues of `UnlabeledCopy`/`copyCount`/`unlabeledCopyCount`: a type `UnlabeledEmbedding G H` for induced subgraphs of `H` isomorphic to `G`, a count `H.embeddingCount G := Nat.card (G ↪g H)` for induced labeled copies (i.e. graph embeddings), and a count `H.unlabeledEmbeddingCount G := Nat.card (G.UnlabeledEmbedding H)` for induced unlabelled copies, each with the parallel `_of_isEmpty` / `_eq_zero` / `_pos` / `_le_*` / `_eq_nat_card` API. `IsIndContained`, the `⊴` notation, `IndFree`, and all related lemmas move from `Copy.lean` to the new file. `Embedding.range_toSubgraph` characterises induced subgraphs as the range of `Embedding.toSubgraph : (G ↪g H) → H.Subgraph` and bridges `embeddingCount` to `unlabeledEmbeddingCount`.
Co-authored-by: Malte Jackisch <45597826+MaltyBlanket@users.noreply.github.com>
---
**Final step 5/5 of the `Copy` / `InducedCopy` refactor stack.**
The new file mirrors `Copy.lean`'s organisation (containment → counting → killing sections) for the induced row; the killing-induced-copies machinery is left as a TODO. Naming follows the convention established in #38745: types are guest-first (`UnlabeledEmbedding G H`, `IsIndContained G H`), operations host-first (`H.embeddingCount G`, `H.unlabeledEmbeddingCount G`). The induced labelled type is `Embedding`, i.e., `G ↪g H`, directly. Two bookkeeping changes in `Copy.lean`: `Copy.isContained` / `Embedding.isContained` / `Iso.isContained`/`'` and `isContained_iff_exists_le_comap`, which lived in the now-deleted "Induced containment" section but are non-induced, move up into the `IsContained` section.
`LineGraph.lean`'s `Copy` import switches to `InducedCopy` since it uses `IsIndContained`. The cross-module proofs `embeddingCount_le_copyCount` and `unlabeledEmbeddingCount_le_unlabeledCopyCount` bridge through the public `copyCount_eq_nat_card`/`unlabeledCopyCount_eq_nat_card` lemmas introduced in #38931 (the counts themselves remain unexposed per @plp127's review). `Embedding.ofIsInduced` (used by `Embedding.range_toSubgraph`) comes from the independent prerequisite #39288.
| | labeled | unlabeled |
|---|---|---|
| ordinary | `Copy` / `copyCount` | `UnlabeledCopy` / `unlabeledCopyCount` |
| induced | `Embedding` / `embeddingCount` | `UnlabeledEmbedding` / `unlabeledEmbeddingCount` |
This branch sits on top of an octopus-merge diffbase (`FordUniver:diffbase/ind-copy-count`) of `chore/copy-nat-card` and `feat/subgraph-ofIsInduced`, so the link below shows only the changes intrinsic to this PR.
- [ ] depends on: #38931
- [ ] depends on: #39288
Diff for the changes *just* in this PR over its predecessors: [link](https://github.com/FordUniver/mathlib4/compare/diffbase/ind-copy-count...feat/ind-copy-count).
|
t-combinatorics
new-contributor
blocked-by-other-PR
large-import
tech debt
|
655/353 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Copy.lean,Mathlib/Combinatorics/SimpleGraph/InducedCopy.lean,Mathlib/Combinatorics/SimpleGraph/LineGraph.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean |
5 |
44 |
['FordUniver', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'plp127'] |
nobody |
0-58117 16 hours ago |
72-42165 72 days ago |
2-46521 2 days |
| 38843 |
FordUniver author:FordUniver |
chore(Combinatorics/SimpleGraph/Copy): replace file-wide `@[expose]` with selective exposure |
Removes the file-wide `@[expose] public section` and restores selective `@[expose]` only on the small constructive `def`s that need cross-module reduction: `Copy.toEmbedding`, `Copy.id`, `Copy.ofLE`, `Copy.topEmbedding` — each has an exported `@[simp]` lemma proved by `rfl` that needs the definition unfolded to typecheck. Replaces `@[simps!]` on `topEmbedding` with an explicit `@[simp] topEmbedding_apply` to avoid a private `_proof_1` term leaking into generated lemma names; adds `toEmbedding_apply` to match the existing `toHom_apply`. Switches `IsIndContained` from `def` to `abbrev` so the structural alias `Nonempty (G ↪g H)` stays transparent, matching `IsContained` and `Free`.
Co-authored-by: Malte Jackisch <45597826+MaltyBlanket@users.noreply.github.com>
---
**Step 3/5 of the `Copy` / `InducedCopy` refactor-feat stack.**
The noncomputable counts `copyCount` and `unlabeledCopyCount` are deliberately *not* exposed (see [@plp127's review](https://github.com/leanprover-community/mathlib4/pull/38631#discussion_r3161902380) on #38631 explaining that unfolding a `classical`-`Fintype.card` body is rarely what you want); the downstream consumers in #38631 bridge via public `*_eq_nat_card` lemmas introduced in #38931 instead.
- [ ] depends on: #38745
Diff for the changes *just* in this PR over its predecessor: [link](https://github.com/FordUniver/mathlib4/compare/chore/copy-spelling...chore/copy-expose)
|
t-combinatorics
new-contributor
blocked-by-other-PR
tech debt
|
257/247 |
Mathlib/Combinatorics/SimpleGraph/Copy.lean |
1 |
5 |
['github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
0-57632 16 hours ago |
60-30606 60 days ago |
0-76500 21 hours |
| 29077 |
grunweg author:grunweg |
feat(Manifold/Instances/Icc): golf smoothness proof using immersions |
Prove that the inclusion of an interval into the real numbers is a smooth embedding,
and use this to golf the proof that this inclusion is smooth.
---
- [x] depends on: #28865
- [x] depends on: #40632
- [x] depends on: #40634
- [x] depends on: #40637
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|
t-differential-geometry
tech debt
|
75/46 |
Mathlib/Geometry/Manifold/Instances/Icc.lean |
1 |
4 |
['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] |
nobody |
0-30836 8 hours ago |
0-31021 8 hours ago |
0-30980 8 hours |
| 40033 |
JJYYY-JJY author:JJYYY-JJY |
chore: remove flexible linter suppressions |
Replace `simp; infer_instance` with explicit proofs.
---
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|
new-contributor
tech debt
awaiting-author
awaiting-zulip
|
6/6 |
Mathlib/Dynamics/TopologicalEntropy/DynamicalEntourage.lean,Mathlib/Topology/UniformSpace/Ultra/Constructions.lean |
2 |
14 |
['JJYYY-JJY', 'chenson2018', 'github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts', 'vihdzp'] |
nobody |
0-28717 7 hours ago |
2-31665 2 days ago |
41-33564 41 days |
| 41543 |
smmercuri author:smmercuri |
refactor(NumberTheory): make `InfinitePlace.Completion` a one-field structure |
Makes FLT a lot faster. `InfinitePlace` analogue of #41526.
---
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|
t-number-theory
tech debt
delegated
|
169/40 |
Mathlib/NumberTheory/NumberField/Completion/InfinitePlace.lean,Mathlib/NumberTheory/NumberField/Completion/LiesOverInstances.lean,Mathlib/NumberTheory/NumberField/InfiniteAdeleRing.lean |
3 |
12 |
['github-actions', 'kbuzzard', 'leanprover-radar', 'mathlib-bors', 'riccardobrasca', 'smmercuri'] |
nobody |
0-24239 6 hours ago |
0-24262 6 hours ago |
2-69471 2 days |
| 39890 |
thorimur author:thorimur |
feat: overhaul `defsWithUnderscore` linter |
Modifies the behavior of the `defsWithUnderscore` linter to be more principled.
- Instead of exempting parsers by namespace, exempts by type.
- Exempt library notes by type (thus linting potential incorrect non-`LibraryNote` defs in the `LibraryNote` namespace).
- Exempt deprecated declarations; these are not technical debt (at least, not for this reason).
- Exempt `Prop`-typed defs; these may be made by `unif_hint`, for example, and are the resposibility of a different linter in any case.
- Exempts `Formatter` and `Parenthesizer` declarations.
- In the case that a definition is namespaceed under a theorem, exempts (only) the part of the declaration name that is a theorem.
- Do not exempt on the basis of guillemets; this is an elaborator feature.
- Do not exempt private declaration names. `isAutoDecl` (mistakenly?) considers all private names to be autogenerated, and we therefore need `isPrivateToUsername` beforehand. (Really, though, maybe this should be a batteries fix.) The reasoning here is that underscores are a *source readability* concern, not just a public interface concern, so private names are in scope for the linter as well.
- Exempts all `_<number>` names, not just `_1` and `_2`.
- Exempts decls ending in `_project` when they come from `Project`, using the same mechanism by which `_project` is appended.
- Modifications to the meta code to module-proof the linter, in the eventuality that env_linters have to be modulized or we want to use this function in a syntax linter.
---
- [x] depends on: #40125
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t-linter
tech debt
awaiting-author
|
260/195 |
Mathlib/Tactic/Linter/Style.lean,MathlibTest/Linter/TextBased.lean,scripts/nolints.json |
3 |
5 |
['SnirBroshi', 'github-actions', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
0-6190 1 hour ago |
6-7571 6 days ago |
33-80855 33 days |
| Number |
Author |
Title |
Description |
Labels |
+/- |
Modified files (first 100) |
📝 |
💬 |
All users who commented or reviewed |
Assignee(s) |
Updated |
Last status change |
total time in review |
| 10721 |
urkud author:urkud |
feat(Order/FunLike): define `PointwiseLE` |
- introduce a mixin class `DFunLike.PointwiseLE`, use it to define `DFunLike.instPartialOrder`;
- add a generic `DFunLike.orderEmbeddingCoe`
- add `DFunLike.PointwiseLE` instances here and there.
With this refactor and #13022, I'm going to generalize lemmas like `MeasureTheory.ae_mono` to `OuterMeasureClass`.
---
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[](https://gitpod.io/from-referrer/) |
merge-conflict
t-order
t-logic
|
123/50 |
Mathlib.lean,Mathlib/Algebra/Order/Hom/Ring.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Dynamics/Circle/RotationNumber/TranslationNumber.lean,Mathlib/GroupTheory/Congruence.lean,Mathlib/Order/FunLike.lean,Mathlib/Order/Heyting/Hom.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Hom/Bounded.lean,Mathlib/Order/Hom/CompleteLattice.lean,Mathlib/Topology/Order/Hom/Basic.lean |
13 |
48 |
['YaelDillies', 'dupuisf', 'urkud'] |
nobody |
711-37057 1 year ago |
761-15459 761 days ago |
64-12984 64 days |
| 8788 |
FMLJohn author:FMLJohn |
feat(Algebra/Module/GradeZeroModule): if `A` is a graded semiring and `M` is a graded `A`-module, then each grade of `M` is a module over the 0-th grade of `A`. |
---
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- [ ] depends on: #8187
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
label:t-algebra$ |
237/4 |
Mathlib.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Module/GradeZeroModule.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/Noetherian.lean |
6 |
4 |
['FMLJohn', 'github-actions'] |
nobody |
711-37056 1 year ago |
951-26952 951 days ago |
1-57831 1 day |
| 7875 |
astrainfinita author:astrainfinita |
chore: make `SMulCommClass A A B` and `SMulCommClass A B B` higher priority |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
slow-typeclass-synthesis
t-algebra
label:t-algebra$ |
54/48 |
Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/Ring/CentroidHom.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Analysis/Complex/UnitDisc/Basic.lean,Mathlib/Analysis/NormedSpace/lpSpace.lean,Mathlib/Data/Matrix/Basic.lean,Mathlib/GroupTheory/GroupAction/Prod.lean,Mathlib/GroupTheory/GroupAction/Ring.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean,Mathlib/GroupTheory/MonoidLocalization.lean,Mathlib/GroupTheory/Submonoid/Center.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/RingTheory/Ideal/Quotient.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/Topology/ContinuousFunction/ContinuousMapZero.lean,Mathlib/Topology/ContinuousFunction/StoneWeierstrass.lean,Mathlib/Topology/ContinuousFunction/ZeroAtInfty.lean |
27 |
15 |
['Parcly-Taxel', 'astrainfinita', 'jcommelin', 'leanprover-bot'] |
nobody |
711-37055 1 year ago |
765-53563 765 days ago |
1-47913 1 day |
| 6491 |
eric-wieser author:eric-wieser |
chore(Mathlib/Algebra/Hom/GroupAction): add `SMulHomClass.comp_smul` |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
label:t-algebra$ |
24/10 |
Mathlib/Algebra/Hom/GroupAction.lean |
1 |
0 |
[] |
nobody |
711-37054 1 year ago |
983-23054 983 days ago |
83-76369 83 days |
| 10629 |
madvorak author:madvorak |
feat: List.cons_sublist_append_iff_right |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-data
|
11/0 |
Mathlib/Data/List/Basic.lean |
1 |
1 |
['eric-wieser'] |
nobody |
697-30599 1 year ago |
823-39436 823 days ago |
53-73442 53 days |
| 13791 |
digama0 author:digama0 |
refactor: Primrec and Partrec |
General cleanup of the `Primrec` and `Partrec` files, to better adjust to lean 4 things. The main user-visible change is that `Primrec₂` is no longer a `def` but an `abbrev`, because it was causing inference issues in lean 4. I also removed all the nonterminal `simp`s in `PartrecCode.lean`.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-computability
tech debt
|
585/778 |
Mathlib/Computability/Ackermann.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/Primrec.lean |
5 |
2 |
['github-actions', 'grunweg'] |
nobody |
692-79844 1 year ago |
756-69430 756 days ago |
1-84718 1 day |
| 12418 |
rosborn author:rosborn |
style: replace preimage_val with ↓∩ notation |
---
This is a rough draft of what the new `↓∩` notation would look like within mathlib. I believe this is an improvement in clarity and would like to have `↓∩` as a standard notation (along with `''`, `⁻¹'`, `↑`, etc...). As `↓∩` is specialized for `Set`s, I have only changed `preimage_val` when the left-hand side of `↓∩` is a `Set`.
The introduction of the `↓∩` notation to Data.Set.Image is temporary as it isn't possible to import Data.Set.Subset directly. If we want `↓∩` unscoped, where would be the best place to define it? An option is Data.Set.Defs, but the notation cannot be defined without additional imports as the file does not import `notation3`.
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[](https://gitpod.io/from-referrer/)
|
merge-conflict |
56/61 |
Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Data/Set/Function.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Set/Subset.lean,Mathlib/MeasureTheory/Constructions/Polish.lean,Mathlib/MeasureTheory/MeasurableSpace/Basic.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/Order/UpperLower/Basic.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/Clopen.lean,Mathlib/Topology/Connected/Basic.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/LocalAtTarget.lean,Mathlib/Topology/LocallyConstant/Basic.lean,Mathlib/Topology/Separation.lean,Mathlib/Topology/Sober.lean |
18 |
3 |
['grunweg', 'rosborn'] |
nobody |
692-79602 1 year ago |
779-3186 779 days ago |
29-50022 29 days |
| 12751 |
Command-Master author:Command-Master |
feat: add lemmas for Nat/Bits, Nat/Bitwise and Nat/Size |
Remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-data
new-contributor
|
66/7 |
Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Nat/Size.lean |
4 |
26 |
['Command-Master', 'Rida-Hamadani', 'Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'jcommelin'] |
nobody |
692-14356 1 year ago |
727-20578 727 days ago |
56-40668 56 days |
| 10350 |
Shamrock-Frost author:Shamrock-Frost |
feat(Data/Setoid): add the operations of taking the equivalence class of an element and of saturating a set wrt an equivalence relation |
I'm open to suggestions about changing the name "saturate", someone on zulip rightly pointed out this is a very overloaded term in math. That said, I think it's unlikely to cause confusion and that there's only one reasonable interpretation in the context of setoids.
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- [x] depends on: #10347
- [x] depends on: #10348
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-data
|
169/3 |
Mathlib/Data/Setoid/Basic.lean,Mathlib/Data/Setoid/Partition.lean,Mathlib/Order/Closure.lean |
3 |
1 |
[] |
nobody |
690-16630 1 year ago |
809-8258 809 days ago |
19-74546 19 days |
| 17127 |
astrainfinita author:astrainfinita |
chore: remove global `Quotient.mk` `⟦·⟧` notation |
---
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Merge this PR when we are ready to migrate to `QuotLike` API (#16421).
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-data
|
137/2 |
Counterexamples/Pseudoelement.lean,Mathlib/Algebra/Associated/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Order/CauSeq/Completion.lean,Mathlib/Algebra/Quandle.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Product.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean,Mathlib/CategoryTheory/Abelian/Pseudoelements.lean,Mathlib/CategoryTheory/Limits/Shapes/SingleObj.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Free/Coherence.lean,Mathlib/CategoryTheory/Skeletal.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Fintype/List.lean,Mathlib/Data/Fintype/Quotient.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/QPF/Multivariate/Constructions/Fix.lean,Mathlib/Data/QPF/Univariate/Basic.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Data/Set/Finite.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/LinearAlgebra/Dual.lean,Mathlib/LinearAlgebra/Ray.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/ModelTheory/DirectLimit.lean,Mathlib/ModelTheory/Fraisse.lean,Mathlib/ModelTheory/Quotients.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/FundamentalCone.lean,Mathlib/NumberTheory/NumberField/Embeddings.lean,Mathlib/NumberTheory/NumberField/Units/DirichletTheorem.lean,Mathlib/NumberTheory/Padics/PadicIntegers.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/RepresentationTheory/Action/Concrete.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Ordinal.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/Birthday.lean,Mathlib/SetTheory/Game/Impartial.lean,Mathlib/SetTheory/Game/Ordinal.lean,Mathlib/SetTheory/Game/State.lean,Mathlib/SetTheory/Lists.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Surreal/Basic.lean,Mathlib/SetTheory/Surreal/Dyadic.lean,Mathlib/SetTheory/Surreal/Multiplication.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Rank.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/Homotopy/HomotopyGroup.lean,Mathlib/Topology/Homotopy/Path.lean,Mathlib/Topology/Homotopy/Product.lean,Mathlib/Topology/MetricSpace/GromovHausdorff.lean,Mathlib/Topology/UniformSpace/Separation.lean,test/interactiveUnfold.lean |
68 |
1 |
['github-actions'] |
nobody |
650-51695 1 year ago |
650-51695 650 days ago |
4-72805 4 days |
| 13156 |
erdOne author:erdOne |
refactor(Algebra/Module/LocalizedModule): Redefine `LocalizedModule` in terms of `OreLocalization`. |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
label:t-algebra$ |
519/628 |
Mathlib.lean,Mathlib/Algebra/Module/LocalizedModule.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/Localization/BaseChange.lean,Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/OreLocalization/Module.lean,Mathlib/RingTheory/OreLocalization/Ring.lean |
8 |
4 |
['github-actions', 'leanprover-bot', 'mattrobball'] |
nobody |
636-17577 1 year ago |
636-17577 636 days ago |
51-84473 51 days |
| 14598 |
Command-Master author:Command-Master |
chore: add typeclasses to unify various `add_top`, `add_eq_top`, etc. |
Add the four typeclasses `IsTopAbsorbing`, `IsBotAbsorbing`, `NoTopSum`, `NoBotSum`, as additive equivalents for `MulZeroClass` and `NoZeroDivisors`. Add instances of these for `ENNReal`, `WithTop α`, `WithBot α`, `PUnit`, `EReal`, `PartENat`, `Measure`, `Interval` and `Filter`.
Also split `Algebra/Order/AddGroupWithTop` to `Algebra/Order/Group/WithTop` and `Algebra/Order/Monoid/WithTop`
---
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Previous usages of lemmas with quantified names like `WithTop.add_top` have to be changed to just `add_top`.
`add_lt_top` is `@[simp]`, in accordance with `ENNReal.add_lt_top` being `@[simp]`. This affects `WithTop.add_lt_top` which previously hadn't been `@[simp]`.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
t-order
new-contributor
label:t-algebra$ |
264/195 |
Archive/Wiedijk100Theorems/BallotProblem.lean,Mathlib.lean,Mathlib/Algebra/Order/Group/WithTop.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/PUnitInstances/Order.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Analytic/Meromorphic.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/NormedSpace/ENorm.lean,Mathlib/Analysis/SpecialFunctions/JapaneseBracket.lean,Mathlib/Analysis/SpecialFunctions/Log/ENNRealLog.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Nat/WithBot.lean,Mathlib/Data/Real/EReal.lean,Mathlib/LinearAlgebra/Lagrange.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Decomposition/Lebesgue.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL1.lean,Mathlib/MeasureTheory/Function/Jacobian.lean,Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Function/LpSpace.lean,Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Integral/Bochner.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean,Mathlib/MeasureTheory/Integral/VitaliCaratheodory.lean,Mathlib/MeasureTheory/Measure/Hausdorff.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Measure/LevyProkhorovMetric.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/Measure/Regular.lean,Mathlib/MeasureTheory/Measure/Typeclasses.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/Probability/Martingale/Convergence.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/RingTheory/MvPowerSeries/NoZeroDivisors.lean,Mathlib/RingTheory/UniqueFactorizationDomain.lean,Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/HausdorffDistance.lean,Mathlib/Topology/MetricSpace/Lipschitz.lean |
57 |
30 |
['Command-Master', 'YaelDillies', 'github-actions'] |
nobody |
613-47161 1 year ago |
613-47161 613 days ago |
7-45599 7 days |
| 19212 |
Julian author:Julian |
feat(LinearAlgebra): add a variable_alias for VectorSpace |
Taken directly from the variable_alias docs.
Zulip: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/why.20.5Bvariable_alias.5D.20attribute.20is.20not.20used.20in.20Mathlib.3F
---
This is the first actual variable alias added to mathlib. I haven't reviewed variable_alias fully, but it seems like there's at least 3 ways they could be distributed in Mathlib:
* alongside whatever subfolder they "belong to" (which is what I've tentatively done here)
* In a file called `Aliases` somewhere near the thing they alias (which seems less discoverable to me)
* In a single file, a la `Mathlib.TrainingWheels` (with some less playful name) which is meant to define a bunch of more "friendly" aliases all in one place.
I kind of like the idea of the third thing as a future module but perhaps it can be synthesized if/when there are more aliases? For now as I say I've done the first one, but please let me know if someone prefers something else.
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merge-conflict
t-algebra
label:t-algebra$ |
25/0 |
Mathlib.lean,Mathlib/LinearAlgebra/VectorSpace.lean,scripts/noshake.json |
3 |
10 |
['Julian', 'PieterCuijpers', 'github-actions', 'urkud'] |
nobody |
593-23916 1 year ago |
593-23916 593 days ago |
7-68101 7 days |
| 19337 |
zeramorphic author:zeramorphic |
feat(Data/Finsupp): generalise `Finsupp` to any "zero" value |
Remove the explicit dependence of `Finsupp` on `[Zero M]`, instead defining `Finsupp'` (better name pending) to be functions that are equal to a fixed value `z : M` cofinitely often.
This PR is intended to do the initial work of replacing the definition of `Finsupp` with an instantiation of the more general definition, without adding any appropriate API. If accepted, the API development will follow in later PRs.
Issues to consider:
- Naming of `Finsupp'.`
- Where should `Finsupp'` lemmas go? Do they need their own file/folder under `Data/`?
Relevant Zulip threads:
- https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Finsupp.20generalisations
- https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Finsupp-like.20partial.20function
Comments are welcome.
---
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|
merge-conflict
t-data
|
203/83 |
Archive/Wiedijk100Theorems/Partition.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Rename.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/Data/Finsupp/BigOperators.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/Defs.lean,Mathlib/RingTheory/PowerBasis.lean,scripts/nolints_prime_decls.txt |
13 |
5 |
['github-actions', 'vihdzp', 'zeramorphic'] |
nobody |
590-86393 1 year ago |
590-86393 590 days ago |
4-60621 4 days |
| 18756 |
astrainfinita author:astrainfinita |
refactor: deprecate `DistribMulActionSemiHomClass` `MulSemiringActionSemiHomClass` |
---
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|
merge-conflict
t-algebra
label:t-algebra$ |
50/28 |
Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/GroupTheory/GroupAction/Hom.lean |
3 |
4 |
['astrainfinita', 'github-actions', 'leanprover-bot'] |
nobody |
579-52062 1 year ago |
579-52062 579 days ago |
31-53021 31 days |
| 16120 |
awainverse author:awainverse |
feat(ModelTheory/Algebra/Ring/Basic): Ring homomorphisms are a `StrongHomClass` for the language of rings |
Adds an `IsAlgebraic` instance to the language of rings
Adds a `StrongHomClass` instance to the type of ring homomorphisms between rings with `CompatibleRing` structures
---
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|
merge-conflict
t-algebra
RFC
t-logic
label:t-algebra$ |
34/13 |
Mathlib/ModelTheory/Algebra/Ring/Basic.lean |
1 |
10 |
['ChrisHughes24', 'YaelDillies', 'awainverse', 'github-actions', 'jcommelin'] |
nobody |
551-68236 1 year ago |
551-68236 551 days ago |
135-29017 135 days |
| 20527 |
trivial1711 author:trivial1711 |
refactor(Topology/UniformSpace/Completion): more descriptive names for `α → Completion α` |
- We rename the various maps `α → Completion α` in order to make their names more consistent.
- Let `α` be a uniform space. We rename the uniformly continuous function `α → Completion α` from `UniformSpace.Completion.coe'` to `UniformSpace.Completion.coe`.
- Let `α` be a uniform additive group. We rename the additive group homomorphism `α →+ Completion α` from `UniformSpace.Completion.toCompl` to `UniformSpace.Completion.coeAddHom`.
- Let `α` be a uniform ring. The ring homomorphism `α →+* Completion α` is called `UniformSpace.Completion.coeRingHom`; its name is unchanged.
- Let `α` be a normed space over a field `𝕜`. We rename the linear isometry `α →ₗᵢ[𝕜] Completion α` from `UniformSpace.Completion.toComplₗᵢ` to `UniformSpace.Completion.coeₗᵢ`.
- Let `α` be a normed space over a field `𝕜`. We rename the continuous linear map `α →L[𝕜] Completion α` from `UniformSpace.Completion.toComplL` to `UniformSpace.Completion.coeL`.
- Let `α` be a normed additive group. We rename the norm preserving homomorphism `NormedAddGroupHom α (Completion α)` from `NormedAddCommGroup.toCompl` to `UniformSpace.Completion.coeNormedAddGroupHom`.
- We analogously rename some other theorems.
- We add some trivial theorems (all of which are proved by `rfl`) that state that the functions considered above are equal. We give all of them the `simp` and `norm_cast` attributes.
- We add a new theorem `UniformSpace.Completion.coeAddHom_eq_coe` that states that `UniformSpace.Completion.coeAddHom` and `UniformSpace.Completion.coe` are equal as functions.
- We similarly add a new theorem `UniformSpace.Completion.coeRingHom_eq_coe`.
- We rename the theorem `UniformSpace.Completion.coe_toComplₗᵢ` to `UniformSpace.Completion.coeₗᵢ_eq_coe`.
- We rename the theorem `UniformSpace.Completion.coe_toComplL` to `UniformSpace.Completion.coeL_eq_coe`.
- We similarly add a new theorem `UniformSpace.Completion.coeNormedAddGroupHom_eq_coe`.
- We change all occurrences of the string `((↑) : α → Completion α)` to `(coe : α → Completion α)` or just `coe`.
- We put the statements of some theorems into simp normal form by using the plain function `coe` rather than the homomorphisms that carry more structure.
---
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|
merge-conflict
t-topology
|
130/92 |
Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Complex/AbsMax.lean,Mathlib/Analysis/Complex/Liouville.lean,Mathlib/Analysis/InnerProductSpace/Completion.lean,Mathlib/Analysis/Normed/Group/HomCompletion.lean,Mathlib/Analysis/Normed/Module/Completion.lean,Mathlib/Analysis/SpecialFunctions/NonIntegrable.lean,Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean,Mathlib/Topology/Algebra/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/Nonarchimedean.lean,Mathlib/Topology/Algebra/Nonarchimedean/Completion.lean,Mathlib/Topology/Algebra/UniformRing.lean,Mathlib/Topology/Category/UniformSpace.lean,Mathlib/Topology/MetricSpace/Completion.lean,Mathlib/Topology/UniformSpace/Completion.lean |
17 |
4 |
['eric-wieser', 'github-actions', 'trivial1711'] |
nobody |
545-12868 1 year ago |
545-12868 545 days ago |
6-66637 6 days |
| 18474 |
astrainfinita author:astrainfinita |
perf: lower the priority of `*WithOne.to*` instances |
---
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From #7873.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
slow-typeclass-synthesis
t-algebra
t-data
label:t-algebra$ |
9/2 |
Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Data/Int/Cast/Defs.lean,Mathlib/Data/Nat/Cast/Defs.lean |
3 |
7 |
['astrainfinita', 'eric-wieser', 'github-actions', 'leanprover-bot'] |
nobody |
542-86298 1 year ago |
542-86298 542 days ago |
76-66916 76 days |
| 20372 |
jvlmdr author:jvlmdr |
feat(MeasureTheory/Function): Add ContinuousLinearMap.bilinearCompLp(L) |
Introduce ContinuousLinearMap.bilinearCompLp and bilinearCompLpL.
Generalize eLpNorm_le_eLpNorm_mul_eLpNorm theorems to include constant C in bound condition.
---
Expect this may be useful for defining tempered distributions from functions in `L^p`.
The definitions more or less follow `ContinuousLinearMap.compLp...`. Names are loosely analogous to `ContinuousLinearMap.bilinearComp` and `SchwartzMap.bilinLeftCLM`.
Note: I preferred the spelling `hpqr : p⁻¹ + q⁻¹ = r⁻¹` with `f` in `L^p` and `g` in `L^q` to `hpqr : 1 / p = 1 / q + 1 / r`. It's easier to obtain from `ENNReal.IsConjExponent` too.
A few questions:
- [ ] I defined `bilinear{Left,Right}LpL` in addition to `bilinearCompLpL` because `LinearMap.mkContinuous₂` is marked as `noncomputable` and `LinearMap.mkContinuous` is not. Is this worth the extra definitions? (Note: This is not visible in the source due to `noncomputable section`.)
- [ ] Should I use `C : ℝ` instead of `C : NNReal` for `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'`?
- [ ] Is it going to be painful to have `[Fact (1 ≤ p)] [Fact (1 ≤ q)] [Fact (1 ≤ r)]`? I don't think there's a way to avoid it though. Maybe providing specialized versions for `p.IsConjExponent q` with `L^1`?
Naming:
- [ ] Is it satisfactory to add a `'` to the `eLpNorm_le_eLpNorm_mul_eLpNorm ` definitions in `CompareExp.lean` where `≤ ‖f x‖ * ‖g x‖` has been replaced with `≤ C * ‖f x‖ * ‖g x‖`? These could replace the existing theorems, although I don't want to break backwards compatibility. There are 5 instances: `eLpNorm_le_eLpNorm_top_mul_eLpNorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm_top'`, `eLpNorm'_le_eLpNorm'_mul_eLpNorm''`, `eLpNorm_le_eLpNorm_mul_eLpNorm_of_nnnorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'` (I'm not sure why the existing theorem `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm` has an internal `'`)
- [ ] Is `bilinearLeftLpL` a suitable name? Other options: `bilinearCompLpLeftL`, `bilinearCompLeftLpL`, `bilinLeftLpL` (analogous to `SchwartzMap.bilinLeftCLM`)
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merge-conflict
t-measure-probability
new-contributor
|
203/40 |
Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSpace.lean |
2 |
1 |
['github-actions'] |
nobody |
530-24155 1 year ago |
530-24155 530 days ago |
27-43617 27 days |
| 21959 |
BGuillemet author:BGuillemet |
feat(Topology/ContinuousMap): Stone-Weierstrass theorem for MvPolynomial |
Add the subalgebra of multivariate polynomials and prove it separates points, on the same model as `ContinuousMap/Polynomial.lean`.
Prove the Stone-Weierstrass theorem and some variations for multivariate polynomials.
---
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|
merge-conflict
t-topology
new-contributor
|
285/1 |
Mathlib.lean,Mathlib/Topology/ContinuousMap/MvPolynomial.lean,Mathlib/Topology/ContinuousMap/StoneWeierstrass.lean |
3 |
1 |
['github-actions'] |
nobody |
494-10176 1 year ago |
494-10176 494 days ago |
16-76141 16 days |
| 18470 |
astrainfinita author:astrainfinita |
perf: lower the priority of `Normed*.to*` instances |
---
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From #7873.
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|
merge-conflict
slow-typeclass-synthesis
t-algebra
t-analysis
label:t-algebra$ |
28/0 |
Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean |
2 |
9 |
['astrainfinita', 'github-actions', 'jcommelin', 'leanprover-bot'] |
nobody |
489-68003 1 year ago |
489-68003 489 days ago |
129-16341 129 days |
| 8767 |
eric-wieser author:eric-wieser |
refactor(Cache): tidy lake-manifest parsing in Cache |
This now respects local copies of Mathlib dependencies (though in practice these invalidate the *online* cache because to point to local copies of Mathlib, the hash for `lakefile.lean` and `lake-manifest.json` is first invalidated).
---
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|
merge-conflict
t-meta
|
49/49 |
Cache/Hashing.lean,Cache/IO.lean,lake-manifest.json |
3 |
8 |
['digama0', 'eric-wieser', 'github-actions'] |
nobody |
486-67735 1 year ago |
668-33685 668 days ago |
119-35643 119 days |
| 22660 |
Ruben-VandeVelde author:Ruben-VandeVelde |
chore: follow naming convention around Group.IsNilpotent |
---
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|
merge-conflict
t-algebra
label:t-algebra$ |
133/67 |
Mathlib/GroupTheory/Frattini.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/SpecificGroups/ZGroup.lean |
3 |
1 |
['github-actions'] |
nobody |
482-32431 1 year ago |
482-32431 482 days ago |
10-48025 10 days |
| 21488 |
imbrem author:imbrem |
feat(CategoryTheory/Monoidal): premonoidal categories |
Add support for premonoidal categories
---
Still want to add support for:
- Premonoidal braided/symmetric categories
- The monoidal coherence theorem, which I've already ported in my `discretion` library
- The `coherence` tactic, which should work fine for premonoidal categories too
but wanted to get this in front of reviewers ASAP to make sure my general approach was alright
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|
merge-conflict
t-category-theory
new-contributor
|
900/361 |
Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/CategoryTheory/Bicategory/End.lean,Mathlib/CategoryTheory/GradedObject/Monoidal.lean,Mathlib/CategoryTheory/Localization/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Monoidal/CoherenceLemmas.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/CategoryTheory/Monoidal/End.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/MonoidalComp.lean,MathlibTest/StringDiagram.lean |
21 |
9 |
['YaelDillies', 'github-actions', 'grunweg', 'imbrem', 'kim-em', 'leanprover-community-bot-assistant'] |
nobody |
459-18578 1 year ago |
459-18579 459 days ago |
58-6028 58 days |
| 21525 |
sinhp author:sinhp |
feat(CategoryTheory): Locally Cartesian Closed Categories (Prelim) |
This PR defines the basic preliminaries for defining locally cartesian closed categories (LCCCs). In particular, using the calculus of mates we define certain natural isomorphisms involving `Over.star` and `Over.pullback` which will be crucial in defining the right adjoint to the pullback functor in the development of LCCCs.
---
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|
merge-conflict
t-category-theory
large-import
|
338/24 |
Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Galois/Examples.lean |
3 |
13 |
['b-mehta', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'sinhp'] |
nobody |
459-18576 1 year ago |
459-18578 459 days ago |
36-69400 36 days |
| 16314 |
astrainfinita author:astrainfinita |
chore(Data/Quot): deprecate `ind*'` APIs |
---
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|
merge-conflict
t-data
|
247/287 |
Counterexamples/CliffordAlgebraNotInjective.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean,Mathlib/CategoryTheory/ConnectedComponents.lean,Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/CategoryTheory/Subobject/FactorThru.lean,Mathlib/CategoryTheory/Subobject/Lattice.lean,Mathlib/Computability/Reduce.lean,Mathlib/Computability/Tape.lean,Mathlib/Data/List/Cycle.lean,Mathlib/Data/Multiset/MapFold.lean,Mathlib/Data/Multiset/ZeroCons.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/Data/Setoid/Partition.lean,Mathlib/FieldTheory/Fixed.lean,Mathlib/GroupTheory/Complement.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/Hom.lean,Mathlib/GroupTheory/Coset/Basic.lean,Mathlib/GroupTheory/Coset/Defs.lean,Mathlib/GroupTheory/FreeAbelianGroup.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/Index.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/PGroup.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean,Mathlib/GroupTheory/PresentedGroup.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/GroupTheory/SchurZassenhaus.lean,Mathlib/GroupTheory/Sylow.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/LinearAlgebra/Projectivization/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/LinearAlgebra/Quotient/Defs.lean,Mathlib/MeasureTheory/Function/AEEqFun.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/Order/Antisymmetrization.lean,Mathlib/Order/Category/PartOrd.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/RepresentationTheory/GroupCohomology/Hilbert90.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Functoriality.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Congruence/Basic.lean,Mathlib/RingTheory/Flat/FaithfullyFlat/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousLocalization.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/RingTheory/Ideal/Quotient/Defs.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Valuation/Quotient.lean,Mathlib/Topology/Algebra/Group/TopologicalAbelianization.lean,Mathlib/Topology/Algebra/InfiniteSum/Module.lean,Mathlib/Topology/Separation/Basic.lean |
65 |
4 |
['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] |
nobody |
453-43542 1 year ago |
453-43544 453 days ago |
55-52030 55 days |
| 15483 |
astrainfinita author:astrainfinita |
chore(GroupTheory/Coset): reduce defeq abuse |
---
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|
merge-conflict
t-algebra
label:t-algebra$ |
114/60 |
Mathlib/GroupTheory/Commensurable.lean,Mathlib/GroupTheory/Coset.lean,Mathlib/GroupTheory/QuotientGroup.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/MeasureTheory/Measure/Haar/Quotient.lean,Mathlib/Topology/Algebra/Group/Compact.lean |
6 |
14 |
['astrainfinita', 'eric-wieser', 'github-actions', 'grunweg', 'leanprover-bot', 'mattrobball', 'mergify', 'urkud'] |
nobody |
452-74835 1 year ago |
701-26765 701 days ago |
4-79214 4 days |
| 16594 |
astrainfinita author:astrainfinita |
perf: reorder `extends` and remove some instances in algebra hierarchy |
---
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|
merge-conflict
slow-typeclass-synthesis
t-algebra
label:t-algebra$ |
240/92 |
Mathlib.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Associated/Basic.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Prod.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/Field/Canonical/Defs.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/Ring/InjSurj.lean,Mathlib/Algebra/Ring/Rat.lean,Mathlib/Algebra/Ring/SumsOfSquares.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/InnerProductSpace/Symmetric.lean,Mathlib/CategoryTheory/Preadditive/FunctorCategory.lean,Mathlib/Data/Finset/NoncommProd.lean,Mathlib/Data/Int/Cast/Defs.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/FieldTheory/SplittingField/Construction.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/GroupTheory/Torsion.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/Order/Interval/Finset/Box.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/Coalgebra/Hom.lean,Mathlib/RingTheory/Ideal/Quotient.lean,Mathlib/RingTheory/Perfection.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean,Mathlib/Util/NoInstances.lean,scripts/noshake.json |
50 |
8 |
['astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot'] |
nobody |
452-74611 1 year ago |
657-27758 657 days ago |
14-58900 14 days |
| 23859 |
urkud author:urkud |
feat(Topology/../Order/Field): generalize to `Semifield` |
.. from a linear ordered field to a linear ordered semifield---
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|
merge-conflict
t-topology
|
245/219 |
Mathlib/Algebra/Order/Group/Pointwise/Interval.lean,Mathlib/Analysis/BoxIntegral/Box/SubboxInduction.lean,Mathlib/Topology/Algebra/Order/Field.lean,Mathlib/Topology/Order/Basic.lean |
4 |
3 |
['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] |
nobody |
446-31452 1 year ago |
459-42093 459 days ago |
0-265 4 minutes |
| 23810 |
b-reinke author:b-reinke |
chore(Order/Interval): generalize succ/pred lemmas to partial orders |
Many lemmas in `Mathlib/Order/Interval/Set/SuccPred.lean`and `Mathlib/Order/Interval/Finset/SuccPred.lean` also work for partial orders. They are generalized in this PR by introducing different sections for `PartialOrder` and `LinearOrder` assumptions in the respective files.
---
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merge-conflict
t-order
|
231/89 |
Mathlib/Order/Interval/Finset/SuccPred.lean,Mathlib/Order/Interval/Set/SuccPred.lean |
2 |
2 |
['github-actions', 'leanprover-community-bot-assistant'] |
nobody |
444-8227 1 year ago |
444-8229 444 days ago |
16-29623 16 days |
| 24285 |
madvorak author:madvorak |
chore(Algebra/*-{Category,Homology}): remove unnecessary universe variables |
Discussions:
https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Call.20for.20help.3A.20technical.2F.20organisational.20debt/with/513620128
https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Algebra.20and.20.60Type*.60/with/513558902
https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Task.2026.3A.20Replace.20Type.20u.20by.20Type*.20wherever.20possible/with/513592993
---
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merge-conflict
t-algebra
label:t-algebra$ |
542/916 |
Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Field.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/Subalgebra/Tower.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Central/Basic.lean,Mathlib/Algebra/Central/Defs.lean,Mathlib/Algebra/Central/TensorProduct.lean,Mathlib/Algebra/CharP/Pi.lean,Mathlib/Algebra/CharP/Quotient.lean,Mathlib/Algebra/CharP/Subring.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Finsupp.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/Field/IsField.lean,Mathlib/Algebra/Field/MinimalAxioms.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Field/Subfield/Defs.lean,Mathlib/Algebra/FreeNonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Equiv/Finite.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Hom/End.lean,Mathlib/Algebra/Group/Hom/Instances.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Invertible/Defs.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Group/TypeTags/Finite.lean,Mathlib/Algebra/Group/TypeTags/Hom.lean,Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/Group/WithOne/Basic.lean,Mathlib/Algebra/Group/WithOne/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/Pi.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/NeZero.lean,Mathlib/Algebra/Lie/Abelian.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Lie/CartanMatrix.lean,Mathlib/Algebra/Lie/CartanSubalgebra.lean,Mathlib/Algebra/Lie/Character.lean,Mathlib/Algebra/Lie/Classical.lean,Mathlib/Algebra/Lie/DirectSum.lean,Mathlib/Algebra/Lie/Free.lean,Mathlib/Algebra/Lie/Ideal.lean,Mathlib/Algebra/Lie/IdealOperations.lean,Mathlib/Algebra/Lie/Matrix.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Lie/OfAssociative.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Lie/SkewAdjoint.lean,Mathlib/Algebra/Lie/Solvable.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Lie/TensorProduct.lean,Mathlib/Algebra/Lie/UniversalEnveloping.lean,Mathlib/Algebra/Module/Basic.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/DedekindDomain.lean,Mathlib/Algebra/Module/Defs.lean,Mathlib/Algebra/Module/End.lean,Mathlib/Algebra/Module/Equiv/Opposite.lean,Mathlib/Algebra/Module/Lattice.lean,Mathlib/Algebra/Module/LinearMap/Basic.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/MinimalAxioms.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/Module/Opposite.lean,Mathlib/Algebra/Module/Pi.lean,Mathlib/Algebra/Module/Presentation/Differentials.lean,Mathlib/Algebra/Module/Presentation/Tensor.lean,Mathlib/Algebra/Module/Rat.lean,Mathlib/Algebra/Module/RingHom.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MonoidAlgebra/Support.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/CommRing.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean |
182 |
22 |
['erdOne', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'madvorak', 'mattrobball'] |
nobody |
443-83324 1 year ago |
443-83325 443 days ago |
2-11846 2 days |
| 23349 |
BGuillemet author:BGuillemet |
feat: add LocallyLipschitzOn.lipschitzOnWith_of_isCompact and two small lemmas about Lipschitz functions |
Main feat (in Mathlib/Topology/EMetricSpace/Basic.lean): if a function `f` from an extended pseudometric space to a pseudometric space is locally Lipschitz on a compact subset `s`, then `f` is Lipschitz on `s`. The theorem is true only when the codomain of `f` is a pseudometric space, so it needs imports from Mathlib/Topology/MetricSpace.
Other small feat (in Mathlib/Analysis/Calculus/ContDiff/RCLike.lean): a function that is continuously differentiable on an open subset is locally Lipschitz on this subset.
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|
merge-conflict
t-topology
large-import
new-contributor
|
59/4 |
Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Topology/EMetricSpace/Lipschitz.lean |
2 |
4 |
['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] |
PatrickMassot assignee:PatrickMassot |
411-3674 1 year ago |
411-3676 411 days ago |
35-30364 35 days |
| 16020 |
adomani author:adomani |
feat: compare PR `olean`s size with `master` |
Adds two CI steps:
* `print the sizes of the oleans` that prints the sizes of all the folders containing `Mathlib` `.olean`s;
* `compare oleans` that compares the sizes of the previous step with the corresponding sizes on `master`.
In the test runs, the two steps have taken at most 3 seconds combined (the first is virtually instantaneous, the second one depends on `curl` to find a job id and on `gh` to retrieve the logs of a previous CI run -- everything else appears to be negligible).
This hopefully helps finding out if some PR is bloating up the `.olean`s.
See [this Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Error.3A.20No.20space.20left.20on.20device/near/463792355) for a PR of mine that prompted this check.
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|
merge-conflict
CI
|
120/0 |
.github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,scripts/olean_comparison.sh |
5 |
50 |
['Vtec234', 'YaelDillies', 'adomani', 'bryangingechen', 'github-actions', 'grunweg', 'kim-em', 'leanprover-community-bot-assistant', 'mattrobball'] |
nobody |
401-53681 1 year ago |
401-53683 401 days ago |
285-26861 285 days |
| 25340 |
dupuisf author:dupuisf |
chore(Analysis/Convex): move files pertaining to convex/concave functions to their own folder |
This PR creates a new folder under `Analysis/Convex` called `Analysis/Convex/Function`, which includes files that are mostly or entirely about convex/concave functions (as opposed to convex sets).
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|
merge-conflict
t-convex-geometry
|
4264/4155 |
Mathlib.lean,Mathlib/Analysis/Convex/Continuous.lean,Mathlib/Analysis/Convex/Deriv.lean,Mathlib/Analysis/Convex/Exposed.lean,Mathlib/Analysis/Convex/Extrema.lean,Mathlib/Analysis/Convex/Function.lean,Mathlib/Analysis/Convex/Function/Basic.lean,Mathlib/Analysis/Convex/Function/Continuous.lean,Mathlib/Analysis/Convex/Function/Deriv.lean,Mathlib/Analysis/Convex/Function/Extrema.lean,Mathlib/Analysis/Convex/Function/Integral.lean,Mathlib/Analysis/Convex/Function/Jensen.lean,Mathlib/Analysis/Convex/Function/Mul.lean,Mathlib/Analysis/Convex/Function/Piecewise.lean,Mathlib/Analysis/Convex/Function/Quasiconvex.lean,Mathlib/Analysis/Convex/Function/Slope.lean,Mathlib/Analysis/Convex/Function/Strong.lean,Mathlib/Analysis/Convex/Integral.lean,Mathlib/Analysis/Convex/Jensen.lean,Mathlib/Analysis/Convex/Mul.lean,Mathlib/Analysis/Convex/Piecewise.lean,Mathlib/Analysis/Convex/Quasiconvex.lean,Mathlib/Analysis/Convex/Slope.lean,Mathlib/Analysis/Convex/SpecificFunctions/Basic.lean,Mathlib/Analysis/Convex/SpecificFunctions/Deriv.lean,Mathlib/Analysis/Convex/Strong.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/MeanInequalitiesPow.lean,Mathlib/Analysis/Normed/Module/Convex.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Analysis/SpecialFunctions/Log/NegMulLog.lean,Mathlib/Analysis/SpecialFunctions/Pochhammer.lean,Mathlib/MeasureTheory/Measure/Decomposition/IntegralRNDeriv.lean,Mathlib/NumberTheory/Harmonic/GammaDeriv.lean |
34 |
2 |
['github-actions', 'leanprover-community-bot-assistant'] |
nobody |
400-26501 1 year ago |
400-26503 400 days ago |
6-39812 6 days |
| 18441 |
ADedecker author:ADedecker |
refactor(AdicTopology): use new API for algebraic filter bases, and factor some code |
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|
merge-conflict
t-topology
t-algebra
label:t-algebra$ |
847/159 |
Mathlib.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/AdicTopology.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean |
6 |
3 |
['ADedecker', 'github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
388-18242 1 year ago |
620-16141 620 days ago |
0-679 11 minutes |
| 18439 |
ADedecker author:ADedecker |
refactor: use new algebraic filter bases API in `FiniteAdeleRing` |
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|
merge-conflict
t-topology
t-algebra
label:t-algebra$ |
699/21 |
Mathlib.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean |
6 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
388-18240 1 year ago |
620-17784 620 days ago |
0-619 10 minutes |
| 18438 |
ADedecker author:ADedecker |
refactor: adapt `KrullTopology` to the new algebraic filter bases API |
---
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|
merge-conflict
t-topology
t-algebra
label:t-algebra$ |
771/168 |
Mathlib.lean,Mathlib/FieldTheory/KrullTopology.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean |
6 |
5 |
['ADedecker', 'AntoineChambert-Loir', 'github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
388-18239 1 year ago |
620-18426 620 days ago |
0-638 10 minutes |
| 13964 |
pechersky author:pechersky |
feat(Data/DigitExpansion): begin defining variant of reals without rationals |
Based on a de Bruijn 1976 paper.
This file is just the basic definition of a digit expansion. Will be followed up with further constructions.
---
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|
merge-conflict
t-data
|
518/0 |
Mathlib.lean,Mathlib/Data/DigitExpansion/Defs.lean,docs/references.bib |
3 |
11 |
['eric-wieser', 'github-actions', 'kim-em', 'pechersky'] |
dupuisf assignee:dupuisf |
385-530 1 year ago |
623-26746 623 days ago |
129-57999 129 days |
| 24823 |
eric-wieser author:eric-wieser |
refactor: add `hom` lemmas for the `MonoidalCategory` structure on `ModuleCat` |
---
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|
merge-conflict
t-algebra
label:t-algebra$ |
148/164 |
Mathlib/Algebra/Category/FGModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Closed.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Symmetric.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Free.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Generator.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Internal/Module.lean,Mathlib/RepresentationTheory/Coinvariants.lean,Mathlib/RepresentationTheory/Rep.lean |
11 |
21 |
['101damnations', 'YaelDillies', 'eric-wieser', 'github-actions', 'joelriou', 'kbuzzard', 'leanprover-community-bot-assistant'] |
101damnations assignee:101damnations |
372-51590 1 year ago |
372-51590 372 days ago |
40-60910 40 days |
| 25071 |
erdOne author:erdOne |
feat(EllipticCurve): basic API for singular cubics |
---
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|
merge-conflict
t-algebraic-geometry
|
320/0 |
Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Singular/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/VariableChange.lean |
3 |
35 |
['Multramate', 'acmepjz', 'erdOne', 'github-actions', 'leanprover-community-bot-assistant'] |
nobody |
372-51344 1 year ago |
372-51345 372 days ago |
45-4562 45 days |
| 25988 |
Multramate author:Multramate |
refactor(AlgebraicGeometry/EllipticCurve/*): replace Fin 3 with products |
This PR continues the work from #24593.
Original PR: https://github.com/leanprover-community/mathlib4/pull/24593 |
merge-conflict
t-algebraic-geometry
|
1000/1022 |
Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Point.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Point.lean |
6 |
3 |
['Multramate', 'github-actions', 'leanprover-community-bot-assistant'] |
nobody |
372-51032 1 year ago |
372-51032 372 days ago |
18-21880 18 days |
| 26067 |
mapehe author:mapehe |
feat(Topology/StoneCech): exists_continuous_surjection_from_StoneCech_to_dense_range |
This lemma formalises the following version of the maximality property of the Stone–Čech compactification: If `f : α → β` is a continuous map from a topological space `α` to a Hausdorff space `β` with dense range, then there exists a continuous surjection from `StoneCech α` to `β` extending `f`. In particular, `StoneCech α` is the “largest” compact Hausdorff space into which `α` densely embeds, in the sense that any other such space is a continuous image of it.
---
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merge-conflict
t-topology
|
18/0 |
Mathlib/Topology/StoneCech.lean |
1 |
2 |
['github-actions', 'leanprover-community-bot-assistant'] |
nobody |
369-32410 1 year ago |
369-32410 369 days ago |
20-8582 20 days |
| 25238 |
Hagb author:Hagb |
feat(Tactic/ComputeDegree): add support for scalar multiplication with different types |
It would be able to deal with `a • (X : R[X])` where `a : S` is in a different type `S` with `[SMulZeroClass S R]`.
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- [x] depends on: #25237
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-meta
new-contributor
|
17/5 |
Mathlib/Tactic/ComputeDegree.lean,MathlibTest/ComputeDegree.lean |
2 |
3 |
['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] |
nobody |
342-29672 11 months ago |
372-51341 372 days ago |
38-26044 38 days |
| 18646 |
jxjwan author:jxjwan |
feat(RingTheory): isotypic components |
---
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|
merge-conflict
t-ring-theory
new-contributor
|
308/0 |
Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/RingTheory/Isotypic.lean,Mathlib/RingTheory/SimpleModule.lean |
3 |
1 |
['github-actions'] |
nobody |
341-31693 11 months ago |
594-25286 594 days ago |
20-15640 20 days |
| 26200 |
adomani author:adomani |
fix: add label when landrun fails |
Adds the `permission-denied` label on PRs that get blocked by landrun.
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|
merge-conflict
CI
|
68/8 |
.github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml |
4 |
2 |
['github-actions', 'mathlib4-merge-conflict-bot'] |
nobody |
340-67025 11 months ago |
340-67025 340 days ago |
46-52210 46 days |
| 27987 |
kckennylau author:kckennylau |
feat(RingTheory/Valuation): define ball, closed ball, and sphere |
---
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The pullback PR of #26827 and #27451.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-ring-theory
large-import
|
73/0 |
Mathlib/RingTheory/Valuation/Basic.lean |
1 |
4 |
['JovanGerb', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] |
nobody |
335-12757 11 months ago |
335-12758 335 days ago |
6-6455 6 days |
| 27003 |
eric-wieser author:eric-wieser |
chore: use `Simp.ResultQ` more often |
Also uses `~q` in place of manual `isDefEq` matching.
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|
merge-conflict
t-meta
|
18/22 |
Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/NormNum/Result.lean,Mathlib/Tactic/ReduceModChar.lean |
3 |
7 |
['JovanGerb', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] |
JovanGerb assignee:JovanGerb |
333-27381 10 months ago |
333-27382 333 days ago |
32-70098 32 days |
| 25401 |
digama0 author:digama0 |
feat(Util): SuppressSorry option |
See also leanprover/lean4#8611 and [#lean4 > Silent sorry @ 💬](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/Silent.20sorry/near/503537964). This is a stop-gap solution while leanprover/lean4#8611 is underway, but it works about as well as any other built in option. Hooking declaration elaborators turns out to be a very powerful technique.
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|
merge-conflict
t-meta
|
342/0 |
Mathlib.lean,Mathlib/Util/CommandElabHook.lean,Mathlib/Util/SuppressSorry.lean,MathlibTest/suppressSorry.lean |
4 |
15 |
['digama0', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] |
alexjbest assignee:alexjbest |
332-68577 10 months ago |
332-68577 332 days ago |
71-28496 71 days |
| 28622 |
alreadydone author:alreadydone |
chore(Mathlib): replace `=>` by `↦` |
---
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merge-conflict |
51792/51792 |
Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Hom/Rat.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Opposite.lean,Mathlib/Algebra/Algebra/Prod.lean,Mathlib/Algebra/Algebra/Rat.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Spectrum/Pi.lean,Mathlib/Algebra/Algebra/Spectrum/Quasispectrum.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Centralizer.lean,Mathlib/Algebra/Algebra/Subalgebra/Directed.lean,Mathlib/Algebra/Algebra/Subalgebra/IsSimpleOrder.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/Subalgebra/Matrix.lean,Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/Algebra/Subalgebra/Prod.lean,Mathlib/Algebra/Algebra/Subalgebra/Unitization.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Algebra/TransferInstance.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/AlgebraicCard.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Expect.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/BigOperators/Finsupp/Fin.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/Group/Finset/Sigma.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Defs.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Defs.lean,Mathlib/Algebra/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Algebra/BigOperators/Ring/Multiset.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/AlgCat/Monoidal.lean,Mathlib/Algebra/Category/BialgCat/Basic.lean,Mathlib/Algebra/Category/BoolRing.lean,Mathlib/Algebra/Category/CoalgCat/Basic.lean,Mathlib/Algebra/Category/CoalgCat/ComonEquivalence.lean,Mathlib/Algebra/Category/FGModuleCat/Limits.lean,Mathlib/Algebra/Category/Grp/AB.lean,Mathlib/Algebra/Category/Grp/Adjunctions.lean,Mathlib/Algebra/Category/Grp/Basic.lean,Mathlib/Algebra/Category/Grp/Biproducts.lean,Mathlib/Algebra/Category/Grp/CartesianMonoidal.lean,Mathlib/Algebra/Category/Grp/Colimits.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/Category/Grp/FilteredColimits.lean,Mathlib/Algebra/Category/Grp/Images.lean,Mathlib/Algebra/Category/Grp/Kernels.lean,Mathlib/Algebra/Category/Grp/LargeColimits.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Category/Grp/ZModuleEquivalence.lean,Mathlib/Algebra/Category/Grp/Zero.lean,Mathlib/Algebra/Category/GrpWithZero.lean,Mathlib/Algebra/Category/HopfAlgCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Biproducts.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/FilteredColimits.lean,Mathlib/Algebra/Category/ModuleCat/Images.lean,Mathlib/Algebra/Category/ModuleCat/Injective.lean,Mathlib/Algebra/Category/ModuleCat/Kernels.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Closed.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Symmetric.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pushforward.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafify.lean,Mathlib/Algebra/Category/ModuleCat/Products.lean |
3838 |
4 |
['github-actions', 'mathlib4-merge-conflict-bot'] |
nobody |
326-72057 10 months ago |
326-72058 326 days ago |
0-66771 18 hours |
| 28626 |
alreadydone author:alreadydone |
chore(Archive, Counterexamples): replace => by ↦ |
---
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|
merge-conflict |
288/288 |
Archive/Arithcc.lean,Archive/Examples/IfNormalization/Result.lean,Archive/Examples/IfNormalization/WithoutAesop.lean,Archive/Examples/PropEncodable.lean,Archive/Imo/Imo1959Q1.lean,Archive/Imo/Imo1960Q1.lean,Archive/Imo/Imo1962Q4.lean,Archive/Imo/Imo1972Q5.lean,Archive/Imo/Imo1977Q6.lean,Archive/Imo/Imo1981Q3.lean,Archive/Imo/Imo1987Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo1998Q2.lean,Archive/Imo/Imo2001Q2.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2006Q5.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q4.lean,Archive/Imo/Imo2011Q3.lean,Archive/Imo/Imo2013Q1.lean,Archive/Imo/Imo2019Q1.lean,Archive/Imo/Imo2024Q5.lean,Archive/MiuLanguage/Basic.lean,Archive/MiuLanguage/DecisionSuf.lean,Archive/OxfordInvariants/Summer2021/Week3P1.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/AbelRuffini.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/AscendingDescendingSequences.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/BirthdayProblem.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Archive/Wiedijk100Theorems/Konigsberg.lean,Archive/Wiedijk100Theorems/Partition.lean,Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Archive/ZagierTwoSquares.lean,Counterexamples/AharoniKorman.lean,Counterexamples/CanonicallyOrderedCommSemiringTwoMul.lean,Counterexamples/CharPZeroNeCharZero.lean,Counterexamples/CliffordAlgebraNotInjective.lean,Counterexamples/DirectSumIsInternal.lean,Counterexamples/GameMultiplication.lean,Counterexamples/Girard.lean,Counterexamples/HomogeneousPrimeNotPrime.lean,Counterexamples/MapFloor.lean,Counterexamples/MonicNonRegular.lean,Counterexamples/Phillips.lean,Counterexamples/Pseudoelement.lean,Counterexamples/QuadraticForm.lean,Counterexamples/SorgenfreyLine.lean,Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean |
54 |
2 |
['github-actions', 'mathlib4-merge-conflict-bot'] |
nobody |
325-14783 10 months ago |
325-14784 325 days ago |
2-47570 2 days |
| 27403 |
MoritzBeroRoos author:MoritzBeroRoos |
fix: replace probably erroneous usage of ⬝ (with old \cdot) by · (with \centerdot) |
Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot).
Currently the abbreviations \cdot and \centerdot resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for center..).
This pr replaces instances of ⬝ where · was probably meant.
All of the replacement is in comments, except for the file bench_summary.lean which is used for priting the github benchmark results. Since this file is about scientific notation of numbers, sure · was meant to be used, not a rectangle.
[Related](https://github.com/leanprover-community/mathlib4/pull/27399)
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
new-contributor
|
195/195 |
Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/DirectSum/Idempotents.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/DivisionPolynomial/Basic.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/Normed/Unbundled/InvariantExtension.lean,Mathlib/Analysis/SpecialFunctions/Complex/CircleAddChar.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Data/Matrix/Block.lean,Mathlib/Data/Matrix/ConjTranspose.lean,Mathlib/Data/Matrix/Hadamard.lean,Mathlib/Data/Matrix/Mul.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matrix/Reflection.lean,Mathlib/Data/Matrix/RowCol.lean,Mathlib/Data/Matrix/Vec.lean,Mathlib/FieldTheory/PurelyInseparable/PerfectClosure.lean,Mathlib/Geometry/Manifold/GroupLieAlgebra.lean,Mathlib/GroupTheory/Coxeter/Matrix.lean,Mathlib/LinearAlgebra/CrossProduct.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/DotProduct.lean,Mathlib/LinearAlgebra/Matrix/Nondegenerate.lean,Mathlib/LinearAlgebra/Matrix/Orthogonal.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/LinearAlgebra/Matrix/SchurComplement.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Trace.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/PerfectPairing/Matrix.lean,Mathlib/LinearAlgebra/Projectivization/Constructions.lean,Mathlib/NumberTheory/NumberField/ProductFormula.lean,Mathlib/NumberTheory/SiegelsLemma.lean,Mathlib/RingTheory/DividedPowers/SubDPIdeal.lean,Mathlib/SetTheory/Ordinal/Veblen.lean,Mathlib/Topology/Algebra/Module/Equiv.lean,Mathlib/Topology/Homeomorph/Lemmas.lean,Mathlib/Topology/Instances/Matrix.lean,scripts/bench_summary.lean |
49 |
5 |
['eric-wieser', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant'] |
nobody |
323-47819 10 months ago |
346-23741 346 days ago |
7-54661 7 days |
| 28042 |
kckennylau author:kckennylau |
feat(Topology/ValuativeRel): a topological basis indexed by pairs of elements |
---
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The pullback PR of #27314 and #27163.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-ring-theory
|
140/23 |
Mathlib/RingTheory/Valuation/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean |
2 |
3 |
['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] |
nobody |
323-47773 10 months ago |
333-12817 333 days ago |
7-4998 7 days |
| 27399 |
MoritzBeroRoos author:MoritzBeroRoos |
chore: replace every usage of ⬝ᵥ (with old \cdot) by ·ᵥ (with \centerdot) |
Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot).
Currently the abbreviations `\cdot` and `\centerdot` resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for `center`..):
- `\cdot` gives ⬝ [U+2B1D](https://www.compart.com/en/unicode/U+2B1D) "Black Very Small Square"
- `\centerdot` gives · [U+00B7](https://www.compart.com/en/unicode/U+00B7) "Middle Dot"
Mathlib mostly uses the `\centerdot` variant, except for the dotProduct notation and some probably unsuspecting people wanting \centerdot but getting \cdot in their comments and 6 uses of a notation using the raw `\cdot` without any subscript at `Mathlib\Topology\Homotopy\Product.lean`.
This PR replaces the dot product `⬝ᵥ` with its `\centerdot` counterpart `·ᵥ`. The related PR [here](https://github.com/leanprover/vscode-lean4/pull/639) can then overwrite the `\cdot` abbreviation, to produce the same symbol as the `centerdot` abbreviation does.
---
[](https://gitpod.io/from-referrer/)
|
merge-conflict
new-contributor
|
133/133 |
Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Data/Matrix/Block.lean,Mathlib/Data/Matrix/ConjTranspose.lean,Mathlib/Data/Matrix/Hadamard.lean,Mathlib/Data/Matrix/Mul.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matrix/Reflection.lean,Mathlib/Data/Matrix/RowCol.lean,Mathlib/Data/Matrix/Vec.lean,Mathlib/LinearAlgebra/CrossProduct.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/DotProduct.lean,Mathlib/LinearAlgebra/Matrix/Nondegenerate.lean,Mathlib/LinearAlgebra/Matrix/Orthogonal.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/LinearAlgebra/Matrix/SchurComplement.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Trace.lean,Mathlib/LinearAlgebra/PerfectPairing/Matrix.lean,Mathlib/LinearAlgebra/Projectivization/Constructions.lean,Mathlib/Topology/Instances/Matrix.lean |
25 |
6 |
['MoritzBeroRoos', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] |
nobody |
323-9651 10 months ago |
346-23742 346 days ago |
7-62439 7 days |
| 28148 |
kckennylau author:kckennylau |
feat(Matrix): Simproc and Rw-proc for Matrix Transpose |
Co-authored by Aaron Liu.
```lean
example : !![1, 2, 3; 4, 5, 6]ᵀ = !![1, 4; 2, 5; 3, 6] := by
rw [transpose_of% 2 3]
example : !![1, 2, 3; 4, 5, 6]ᵀ = !![1, 4; 2, 5; 3, 6] := by
rw [transpose_of]
example : !![1, 2, 3; 4, 5, 6]ᵀ = !![1, 4; 2, 5; 3, 6] := by
simp only [matrix_transpose]
```
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-meta
|
267/8 |
Mathlib.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/LinearAlgebra/UnitaryGroup.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Simproc/Matrix.lean,MathlibTest/Simproc/Matrix.lean,MathlibTest/matrix.lean,scripts/noshake.json |
8 |
32 |
['eric-wieser', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'plp127'] |
eric-wieser assignee:eric-wieser |
318-52985 10 months ago |
318-52986 318 days ago |
13-1483 13 days |
| 26908 |
robin-carlier author:robin-carlier |
feat(CategoryTheory/Monoidal/DayConvolution): alternative ext principle for unitors |
Currently, our infrastructure for left/right unitors for Day convolution of functors `C ⥤ V` do not have satisfactory extensionality principle: the current way to characterize morphisms out of `U ⊛ F` is the default extensionality principle for Day convolution, which characterizes first such functors via functors out of `U ⊠ F`. Left unitors are then obtained using the fact `U ⊠ F` is a left Kan extension of a functor from `PUnit × C` (which is equivalent to `C`) but we did not record on its own this principle.
Using the transitivity of left Kan extensions proved in #26899, we directly exhibit `U ⊛ F` as a left Kan extension of `F ⋙ tensorLeft (𝟙_ V)` along `tensorLeft (𝟙_ C)`. The unit of this Kan extension is composed exactly of the morphisms that appear in the [characterization of left unitors](https://leanprover-community.github.io/mathlib4_docs/Mathlib/CategoryTheory/Monoidal/DayConvolution.html#CategoryTheory.MonoidalCategory.DayConvolutionUnit.leftUnitor_hom_unit_app).
We also slightly generalize the instances that express that external products with unitors are left Kan extensions, so that they can be used when taking external products with more complicated functors than currently. This is again useful when chaining extensionality lemmas for morphisms out of terms of the form `(F ⊛ U) ⊛ G`.
We prove a similar thing for right unitors
With this, it should be possible to have a much more satisfactory way of working with Day convolutions: this allows to "elimiinate" units without ending up with terms in an external product.
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- [ ] depends on: #26899
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-category-theory
|
307/18 |
Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean |
2 |
4 |
['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
307-12931 10 months ago |
307-12932 307 days ago |
0-1812 30 minutes |
| 27150 |
robin-carlier author:robin-carlier |
feat(CategoryTheory/Monoidal/DayConvolution): constructors for braided and symmetric structure on day convolutions monoidal categories |
Following the pattern in #27119, we give API to construct `BraidedCategory` and `SymmetricCategory` structures on a monoidal
category equipped with a `LawfulDayConvolutionMonoidalCategoryStruct`. To achieve this, we introduce an other type class
`LawfulDayConvolutionBraidedCategoryStruct` that bundles an associator isomorphism that behaves like the one constructed for functors in #27067.
We provide a noncomputable constructor for this typeclass that takes as input fullness of the "realization" functor to a category of functors, and we show that the typeclasses are sufficient to define the desired structures.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-category-theory
|
826/9 |
Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Braided.lean |
2 |
5 |
['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
307-7970 10 months ago |
362-37665 362 days ago |
0-1002 16 minutes |
| 27119 |
robin-carlier author:robin-carlier |
feat(CategoryTheory/Monoidal/DayConvolution): constructors for closed monoidal day convolution monoidal structures |
Following the pattern introduced in #26798 and #26820 and using results of #26879, we introduce a typeclass
`LawfulDayConvolutionClosedMonoidalCategoryStruct` that encodes the data needed on a `LawfulDayConvolutionMonoidalCategoryStruct` to define well-behaved internal homs. We give a constructor assuming existence of relevant ends, and prove that this data defines a `MonoidalClosed` instance on the monoidal category structures one can deduce from `LawfulDayConvolutionMonoidalCategoryStruct`.
---
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- [x] depends on: #27091
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- [x] depends on: #26820
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-category-theory
|
900/9 |
Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Closed.lean |
2 |
6 |
['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
306-21821 10 months ago |
363-43133 363 days ago |
0-1 1 second |
| 28623 |
gilesgshaw author:gilesgshaw |
feat(Logic/Basic): minor additions and simplification of proofs |
Add new theorems and simplify proofs.
Specifically, we add the family of related theorems `apply_dite_iff_exists`, `apply_dite_iff_forall`, `apply_ite_iff_and` and `apply_ite_iff_or`.
For each other 'family' of theorems in the file that is analogous to the above, we do the following
- Simplify proofs where possible, e.g. by appealing to the new theorems
- Complete the family, if any of the corresponding four are missing
- Rename to ensure consistency with the above pattern
---
|
merge-conflict
t-logic
new-contributor
|
83/55 |
Archive/Examples/IfNormalization/Result.lean,Archive/Examples/IfNormalization/WithoutAesop.lean,Mathlib/Algebra/ContinuedFractions/Computation/Translations.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Notation/Indicator.lean,Mathlib/LinearAlgebra/Matrix/Rank.lean,Mathlib/Logic/Basic.lean,Mathlib/MeasureTheory/Measure/WithDensity.lean,Mathlib/SetTheory/Ordinal/Notation.lean |
9 |
12 |
['eric-wieser', 'gilesgshaw', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127'] |
awainverse assignee:awainverse |
306-15682 10 months ago |
306-15683 306 days ago |
10-61840 10 days |
| 26154 |
ADedecker author:ADedecker |
refactor: add refactored APIs for algebraic filter bases |
This PR continues the work from #18437.
Original PR: https://github.com/leanprover-community/mathlib4/pull/18437 |
merge-conflict
t-topology
|
651/0 |
Mathlib.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean |
5 |
3 |
['ADedecker', 'github-actions', 'mathlib4-merge-conflict-bot'] |
PatrickMassot assignee:PatrickMassot |
300-27926 9 months ago |
300-27927 300 days ago |
87-79752 87 days |
| 29330 |
plp127 author:plp127 |
chore: define `Fin.cycleIcc` with conditions |
Redefine `Fin.cycleIcc` using conditionals instead of composing existing `Fin` operations together. Its worst-case runtime drops from O(n) to O(1). As a bonus, the definition no longer needs explaining.
---
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|
merge-conflict
t-group-theory
|
61/68 |
Mathlib/GroupTheory/Perm/Fin.lean |
1 |
10 |
['JovanGerb', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'tb65536'] |
nobody |
291-39523 9 months ago |
291-39524 291 days ago |
19-81030 19 days |
| 21950 |
erdOne author:erdOne |
feat(NumberTheory/Padics): the completion of `ℚ` at a finite place is `ℚ_[p]` |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-number-theory
|
253/1 |
Mathlib.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/NumberTheory/Padics/HeightOneSpectrum.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/WithZeroMulInt.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean |
7 |
33 |
['Ruben-VandeVelde', 'erdOne', 'faenuccio', 'github-actions', 'leanprover-community-bot-assistant', 'pechersky', 'smmercuri', 'xroblot'] |
nobody |
289-14633 9 months ago |
370-14570 370 days ago |
73-10883 73 days |
| 27214 |
robin-carlier author:robin-carlier |
feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): Categorical pullback squares |
In this PR, we give the definition and first basic properties of categorical pullback squares.
Using our previous work on `CategoricalPullback`, we define a typeclass `CatPullbackSquare T L R B` that asserts that a given `CatCommSq T L R B` is a "pullback square": this is the data of a chosen adjoint equivalence to the canonical functor from the top left corner of the square to the categorical pulback of its leg. Using this equivalence, be derive a universal property for functors from `X`with values in the top left corner of the square: they are equivalent to `CatCommSqOver R B X`, the category of categorical commutative squares over the cospan `R, B` with top left corner `X`.
We prove some coherence result for this equivalence, most notably an isomorphism that, given `S : CatCommSqOver R B X`, bundles the two commutative triangles formed by the induced functor, and the coherence between the squares that these isomorphisms satisfy: this is conveniently bundled in the data of a single isomorphisms of `CatCommSqOver R B X`.
Finally, we provide a `Prop`-class `IsCatPullbackSquare` that merely asserts the existence (via `Nonempty`) of the relevant data: we show that it is tautotogically equivalent to the propopsition that the canonical functor to the categorical pullback is an equivalence.
---
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|
merge-conflict
t-category-theory
|
786/1 |
Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean |
3 |
3 |
['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
286-4715 9 months ago |
286-4716 286 days ago |
0-4413 1 hour |
| 26466 |
robin-carlier author:robin-carlier |
feat(AlgebraicTopology/SimplexCategory/Augmented): the canonical monoid object in the augmented simplex category |
Show that in the augmented simplex category, `⦋0⦌` is an internal monoid object.
Future work will show that this is in fact the universal monoid object: for any monoidal category `C`, evaluation at `⦋0⦌` induces an equivalence of categories between `Mon_ C` and the category of monoidal functors from `AugmentedSimplexCategory` to `C`. The resulting augmented cosimplicial object one gets from this construction is sometimes called the "monoidal bar construction" attached to a monoid.
This PR was split from #25743.
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|
merge-conflict
t-algebraic-topology
t-category-theory
|
571/111 |
Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented/Mon_.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented/Monoidal.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean |
6 |
4 |
['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
285-24117 9 months ago |
380-31401 380 days ago |
0-1708 28 minutes |
| 26578 |
robin-carlier author:robin-carlier |
feat(CategoryTheory/Limits/Pullbacks/Categorical/CatCospanTransform): adjunctions of categorical cospans |
We build upon the bicategory-like structure developed in #26447 and #26412 to define the notion of adjunctions of categorical cospans. This is a structure encoding the data of two `CatCospanTransform`s, along with the usual unit and counit morphisms as part of the data, satisfying the usual left and right triangle identities. We provide basic API for these, such as extracting adjunctions between individual components. We also provide a proof that the notion satisfies a "coherence": with our chosen constructor, the forward direction of the structure `CatCommSq` on the left adjoints correspond to the inverse of the square for the right adjoints through `mateEquiv`.
These adjunctions will be used as a substrate for defining equivalences of categorical cospans in a future PR: such an equivalence will be a structure extending a `CatCospanAdjunction` with isomorphisms data on the unit and co-unit (we will however provide alternative constructors in sync with the constructor for equivalences of categories).
---
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|
merge-conflict
t-category-theory
large-import
|
205/0 |
Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean |
1 |
5 |
['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
284-27342 9 months ago |
376-36514 376 days ago |
0-625 10 minutes |
| 23621 |
astrainfinita author:astrainfinita |
chore: deprecate `LinearOrderedComm{Monoid, Group}WithZero` |
---
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- [x] depends on: #20676
|
merge-conflict
t-algebra
t-order
label:t-algebra$ |
261/205 |
Archive/Imo/Imo1998Q2.lean,Counterexamples/LinearOrderWithPosMulPosEqZero.lean,Mathlib/Algebra/Order/Field/Canonical.lean,Mathlib/Algebra/Order/Field/Rat.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Nonneg/Field.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Ring/Nat.lean,Mathlib/Combinatorics/Additive/PluenneckeRuzsa.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/Basic.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/NNRat/Lemmas.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Rat/Cast/Order.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Defs.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/NumberTheory/EllipticDivisibilitySequence.lean,Mathlib/NumberTheory/FunctionField.lean,Mathlib/NumberTheory/Ostrowski.lean,Mathlib/RingTheory/Valuation/Archimedean.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/ExtendToLocalization.lean,Mathlib/RingTheory/Valuation/Integers.lean,Mathlib/RingTheory/Valuation/Integral.lean,Mathlib/RingTheory/Valuation/Minpoly.lean,Mathlib/RingTheory/Valuation/Quotient.lean,Mathlib/RingTheory/Valuation/RankOne.lean,Mathlib/RingTheory/Valuation/ValExtension.lean,Mathlib/RingTheory/Valuation/ValuationRing.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/ValuedField.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean,Mathlib/Topology/UnitInterval.lean,MathlibTest/instance_diamonds.lean,scripts/noshake.json |
44 |
24 |
['YaelDillies', 'astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] |
kbuzzard assignee:kbuzzard |
281-9057 9 months ago |
451-67830 451 days ago |
5-42380 5 days |
| 27990 |
kckennylau author:kckennylau |
feat(Counterexamples): a nontrivial valuation with discrete topology |
This file constructs a valuation on `K[X]` satisfying `IsValuativeTopology K[X] ∧ Nonempty (valuation K[X]).RankOne ∧ IsNontrivial K[X] ∧ DiscreteTopology K[X]`, and proves that `IsValuativeTopology F ∧ IsNontrivial F ∧ DiscreteTopology F` is not possible if `F` is a field.
---
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|
merge-conflict
t-ring-theory
|
172/0 |
Counterexamples.lean,Counterexamples/DiscreteTopologyWithNontrivialValuation.lean |
2 |
14 |
['github-actions', 'grunweg', 'kckennylau', 'mathlib4-merge-conflict-bot', 'pechersky'] |
nobody |
273-11188 9 months ago |
273-11189 273 days ago |
67-79609 67 days |
| 28132 |
dupuisf author:dupuisf |
feat: preliminary `grind` tags for `IsUnit` |
This PR adds preliminary `grind` tags for the `IsUnit` predicate.
---
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|
merge-conflict
t-algebra
label:t-algebra$ |
61/17 |
Mathlib/Algebra/Group/Action/Units.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Ring/Units.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Basic.lean |
6 |
3 |
['github-actions', 'mathlib4-merge-conflict-bot'] |
kim-em assignee:kim-em |
249-74186 8 months ago |
249-74187 249 days ago |
80-71575 80 days |
| 26827 |
pechersky author:pechersky |
feat(Analysis/Normed/ValuativeRel): helper instance for NormedField |
---
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- [x] depends on: #26713
- [x] depends on: #26826
|
merge-conflict
t-algebra
t-number-theory
t-analysis
label:t-algebra$ |
211/27 |
Mathlib.lean,Mathlib/Analysis/Normed/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean |
3 |
34 |
['ADedecker', 'adamtopaz', 'erdOne', 'github-actions', 'kbuzzard', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] |
kbuzzard assignee:kbuzzard |
242-16390 8 months ago |
242-16390 242 days ago |
122-66777 122 days |
| 22662 |
plp127 author:plp127 |
feat: Localization.Away.lift (computably) |
This PR adds `Localization.Away.lift'` and `Localization.Away.lift`, computable alternatives to `Localization.awayLift`.
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|
merge-conflict
t-algebra
label:t-algebra$ |
74/0 |
Mathlib/RingTheory/Localization/Away/Basic.lean |
1 |
18 |
['eric-wieser', 'github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] |
kim-em assignee:kim-em |
235-39049 7 months ago |
235-39050 235 days ago |
257-28368 257 days |
| 24850 |
pechersky author:pechersky |
feat(Topology/UniformSpace/Ultra): uniform spaces induced by pseudometrics are ultra if system is ultra |
Any uniform space has a natural system of pseudometrics definable on it,
comprised of those pseudometrics constructed from a descending chain of
equivalence relation entourages. In a nonarchimedean uniformity, this pseudometric system
induces the uniformity.
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merge-conflict
t-topology
|
509/1 |
Mathlib.lean,Mathlib/Topology/MetricSpace/BundledFun.lean,Mathlib/Topology/UniformSpace/Ultra/Pseudometrizable.lean |
3 |
9 |
['ADedecker', 'fpvandoorn', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] |
urkud assignee:urkud |
235-38877 7 months ago |
235-38878 235 days ago |
177-42975 177 days |
| 26914 |
quangvdao author:quangvdao |
feat(Data/PFunctor/Univariate): more definitions for univariate `PFunctor` |
This PR defines several basic definitions of `PFunctor`, including zero, one, constants, monomials, coproduct (sum), product, sigma, pi, tensor product, universe lifting, and equivalence.
We also add: (1) simple lemmas connecting the basic definitions, (2) an automatically derived ext lemma for `PFunctor` via `@[ext]` attribute
Some things I'm not clear on:
- I define `HAdd` and `HMul` instances for coproduct and product of poly functors having different universe levels. Should I also define `Add` and `Mul` instances for poly functors having the same universe level?
- Is it ok to define notation for tensor product, i.e. `@[inherit_doc] scoped infixr:80 " ⊗ " => tensor`? I'm worried it might clash with other notation.
- Need a double-check on the priority of notation.
Some future definitions to add:
- Various equivalences arising from arithmetic identities, e.g., `P + 0 ≃ₚ P`.
- Definitions of Lenses and Charts (each of them will be a file or even a folder)
- Exponential objects (corresponding to both `prod` and `tensor`)
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merge-conflict
t-data
|
144/5 |
Mathlib/Data/PFunctor/Univariate/Basic.lean |
1 |
20 |
['alexkeizer', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'quangvdao'] |
eric-wieser assignee:eric-wieser |
235-38355 7 months ago |
235-38356 235 days ago |
133-24576 133 days |
| 28125 |
nonisomorphiclinearmap author:nonisomorphiclinearmap |
feat(Combinatorics): basic definition of simplicial complexes |
This PR introduces the basic definition of a finite (abstract) simplicial complex, located in Mathlib/Combinatorics/SimplicialComplex/Basic.lean.
---
This is our first contribution to mathlib. This work was done as part of the Fields Institute Summer Undergraduate Program on formalization in topological combinatorics. Eventually, we aim to formalize Lovasz's proof of the Kneser Conjecture and this is a small stepping stone in that direction. Some other commits will shortly depend on this one.
We would like to acknowledge the Fields Institute for Research in Mathematical Sciences for their sponsorship. We would also like to thank our supervisors, Professor Chris Kapulkin and Mr. Daniel Carranza, for their guidance and support throughout this project. We would also like to thank our group members Tom Lindquist and Quang Minh Nguyen for our fruitful discussions. |
merge-conflict
t-combinatorics
new-contributor
|
374/0 |
Mathlib.lean,Mathlib/Combinatorics/SimplicialComplex/Basic.lean,Mathlib/Combinatorics/SimplicialComplex/Category.lean,Mathlib/Combinatorics/SimplicialComplex/FacePoset.lean,Mathlib/Combinatorics/SimplicialComplex/Hom.lean |
5 |
2 |
['github-actions', 'mathlib4-merge-conflict-bot'] |
awainverse assignee:awainverse |
235-38050 7 months ago |
235-38051 235 days ago |
99-62977 99 days |
| 28871 |
JaafarTanoukhi author:JaafarTanoukhi |
feat(Combinatorics/Digraph): Tournaments |
Define orientations and tournaments. Related to #26771.
Co-authored-by: Rida Hamadani <mridahamadani@gmail.com>
---
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|
merge-conflict
t-combinatorics
new-contributor
|
62/0 |
Mathlib.lean,Mathlib/Combinatorics/Digraph/Orientation.lean,Mathlib/Combinatorics/Digraph/Tournament.lean |
3 |
6 |
['JaafarTanoukhi', 'Rida-Hamadani', 'SnirBroshi', 'github-actions', 'mathlib4-merge-conflict-bot'] |
kmill assignee:kmill |
235-37897 7 months ago |
235-37898 235 days ago |
71-37436 71 days |
| 29526 |
llllvvuu author:llllvvuu |
feat: `Multiset.map f` identifies `f` up to permutation |
Motivation: Reason about `Fintype`-indexed families via `Multiset` equality.
Example use case 1:
```lean
theorem Matrix.IsHermitian.cfc_eigenvalues {d : Type*} [Fintype d] [DecidableEq d]
{M : Matrix d d 𝕜} (hM : M.IsHermitian) (f : ℝ → ℝ)
(hcfc : Matrix.IsHermitian (cfc f M) := cfc_predicate f M) :
∃ (e : d ≃ d), hcfc.eigenvalues = f ∘ hM.eigenvalues ∘ e := by
have := hcfc.roots_charpoly_eq_eigenvalues.symm
rw [hM.charpoly_cfc_eq f, Polynomial.roots_prod] at this; swap
· simp [Finset.prod_ne_zero_iff, Polynomial.X_sub_C_ne_zero]
simp_rw [Polynomial.roots_X_sub_C, Multiset.bind_singleton] at this
have he := (Multiset.compTriple_equivOfMapUnivEq this).comp_eq
simp_rw [← Function.comp_def RCLike.ofReal, ← Function.comp_def f, Function.comp_assoc] at he
exact ⟨_, RCLike.ofReal_injective.comp_left he.symm⟩
```
Example use case 2 (on top of https://github.com/leanprover-community/mathlib4/pull/29610):
```lean
theorem LinearMap.Eigenbasis.μ_equiv {ι ι' R G : Type*} [Fintype ι] [Fintype ι']
[CommRing R] [IsDomain R] [AddCommGroup G] [Module R G] [Module.Free R G] [Module.Finite R G]
{f : Module.End R G} (B₁ : f.Eigenbasis ι) (B₂ : f.Eigenbasis ι') :
∃ e : ι ≃ ι', B₁.μ = B₂.μ ∘ e := by
classical
have := congr(Polynomial.roots $(B₁.charpoly_eq.symm.trans B₂.charpoly_eq))
rw [Polynomial.roots_prod, Polynomial.roots_prod] at this; rotate_left
· simp [Finset.prod_ne_zero_iff, Polynomial.X_sub_C_ne_zero]
· simp [Finset.prod_ne_zero_iff, Polynomial.X_sub_C_ne_zero]
simp_rw [Polynomial.roots_X_sub_C, Multiset.bind_singleton] at this
exact ⟨Multiset.equivOfMapUnivEq this, (Multiset.compTriple_equivOfMapUnivEq this).comp_eq.symm⟩
```
Co-authored-by: Aristotle Harmonic <aristotle-harmonic@harmonic.fun>
---
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|
merge-conflict
t-data
|
35/0 |
Mathlib/Data/Multiset/Fintype.lean |
1 |
9 |
['Ruben-VandeVelde', 'github-actions', 'llllvvuu', 'mathlib4-merge-conflict-bot', 'vihdzp', 'wwylele'] |
pechersky assignee:pechersky |
235-37859 7 months ago |
235-37860 235 days ago |
69-23034 69 days |
| 29947 |
JaafarTanoukhi author:JaafarTanoukhi |
feat(Combinatorics/Digraph): Maps |
Ported `SimpleGraph/Maps.lean` to `Digraph/Maps.lean` for future PRs related to issue #[26771](https://github.com/leanprover-community/mathlib4/issues/26771)
---
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|
merge-conflict
t-combinatorics
new-contributor
|
476/0 |
Mathlib.lean,Mathlib/Combinatorics/Digraph/Maps.lean |
2 |
2 |
['github-actions', 'mathlib4-merge-conflict-bot'] |
awainverse assignee:awainverse |
235-37263 7 months ago |
235-37264 235 days ago |
54-85998 54 days |
| 31356 |
adomani author:adomani |
feat: add inspect-like functions |
Produces a tree-like formatting for `Syntax`, `Expr` and `InfoTree`. Especially for the `InfoTree`s, there are *many* parts of it that do not get printed.
For instance, this is how the `InfoTree`s of `set_option linter.missingDocs true` get printed:
```lean
inspectIT
set_option linter.missingDocs true
/-
commandCtx
|-Info.ofCommandInfo: Lean.Elab.Command.elabSetOption, 'set_option…gDocs true'
| |-Info.ofCompletionInfo.CompletionInfo.option 'set_option…issingDocs'
| |-Info.ofOptionInfo: linter.missingDocs, Linter.linter.missingDocs
-/
```
---
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merge-conflict
t-meta
|
720/0 |
Mathlib.lean,Mathlib/Util/Inspect.lean,MathlibTest/Inspect.lean |
3 |
3 |
['github-actions', 'mathlib4-merge-conflict-bot', 'plp127'] |
kim-em assignee:kim-em |
235-32284 7 months ago |
235-32285 235 days ago |
11-62509 11 days |
| 6993 |
jjaassoonn author:jjaassoonn |
feat: lemmas about `AddMonoidAlgebra.{divOf, modOf}` |
---
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- [x] depends on: #7582
- [x] depends on: #8975
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
label:t-algebra$ |
147/3 |
Mathlib/Algebra/MonoidAlgebra/Division.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/MvPolynomial/Basic.lean,Mathlib/Data/MvPolynomial/CommRing.lean,Mathlib/Data/MvPolynomial/Division.lean |
5 |
42 |
['YaelDillies', 'alreadydone', 'digama0', 'eric-wieser', 'github-actions', 'jjaassoonn'] |
nobody |
235-11208 7 months ago |
905-15961 905 days ago |
103-330 103 days |
| 9339 |
FMLJohn author:FMLJohn |
feat(RingTheory/GradedAlgebra/HomogeneousIdeal): given a finitely generated homogeneous ideal of a graded semiring, construct a finite spanning set for the ideal which only contains homogeneous elements |
---
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- [ ] depends on: #8187
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-ring-theory
|
402/4 |
Mathlib.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Module/GradeZeroModule.lean,Mathlib/RingTheory/Finiteness.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousIdeal.lean,Mathlib/RingTheory/GradedAlgebra/Noetherian.lean |
8 |
11 |
['FMLJohn', 'github-actions', 'jjaassoonn'] |
nobody |
235-11161 7 months ago |
919-16139 919 days ago |
6-63597 6 days |
| 10349 |
Shamrock-Frost author:Shamrock-Frost |
refactor(CategoryTheory/MorphismProperty): some clean-ups |
We make explicit some of the galois connections/closure operators in the existing MorphismProperty file, rewrite some proofs to take advantage of these structures, and change map/inverseImage by (1) swapping their argument order, for consistency with Set.range and Set.preimage and (2) making "map" perform the strict, evil map while "essMap" (previously called map) forms the closure of the image under isomorphisms. Finally we add `IsMultiplicative` instances for isos/epis/monos, with an eye towards constructing the wide subcategory on these classes of maps.
---
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- [x] depends on: #10347
- [x] depends on: #10348
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-category-theory
|
474/318 |
Mathlib/CategoryTheory/Localization/Composition.lean,Mathlib/CategoryTheory/Localization/LocalizerMorphism.lean,Mathlib/CategoryTheory/MorphismProperty.lean,Mathlib/Data/Set/Lattice.lean,Mathlib/Order/Closure.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Hom/CompleteLattice.lean,Mathlib/Order/RelIso/Basic.lean |
8 |
1 |
[] |
nobody |
235-11119 7 months ago |
885-66263 885 days ago |
0-418 6 minutes |
| 26890 |
robin-carlier author:robin-carlier |
feat(CategoryTheory/Monoidal/DayConvolution): more API for `DayFunctor` |
We provide some lemmas that helps characterizing the monoidal structure on `DayFunctor`, they are special cases of the lemmas for `LawfulDayConvolutionMonoidalCategoryStruct`.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-category-theory
|
1372/19 |
Mathlib.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/DayFunctor.lean |
4 |
5 |
['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
235-10511 7 months ago |
369-35520 369 days ago |
0-517 8 minutes |
| 24016 |
plp127 author:plp127 |
feat: fine uniformity |
Adds the fine uniformity, and proves some properties.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-topology
|
283/0 |
Mathlib.lean,Mathlib/Topology/UniformSpace/FineUniformity.lean,Mathlib/Topology/UniformSpace/Uniformizable.lean |
3 |
3 |
['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
229-57278 7 months ago |
451-66028 451 days ago |
2-85309 2 days |
| 26912 |
pechersky author:pechersky |
chore(Algebra/Ring/Subring): simp tag `Subring.smul_def` |
s-multiplying by a subtype is easiest to manipulate when both terms are in the ambient type. Many places that had to use the _def lemma for a rewrite, or to include it in a simp set, no longer have to.
Ported from #25308
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I found this being not-simp frustrating when talking about submodules over a valuation subring. |
merge-conflict
t-algebra
label:t-algebra$ |
67/66 |
Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/MulAction.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/LocalizedModule/Exact.lean,Mathlib/Algebra/Module/LocalizedModule/IsLocalization.lean,Mathlib/Algebra/Module/LocalizedModule/Submodule.lean,Mathlib/Algebra/Ring/Periodic.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfFixingSubgroup.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfStabilizer.lean,Mathlib/LinearAlgebra/RootSystem/Irreducible.lean,Mathlib/LinearAlgebra/RootSystem/WeylGroup.lean,Mathlib/RingTheory/Etale/Kaehler.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/LocalProperties/Projective.lean,Mathlib/RingTheory/Localization/InvSubmonoid.lean,Mathlib/RingTheory/OreLocalization/Basic.lean |
25 |
26 |
['artie2000', 'eric-wieser', 'github-actions', 'j-loreaux', 'kckennylau', 'leanprover-bot', 'leanprover-radar', 'mathlib4-merge-conflict-bot', 'pechersky', 'wrenna-robson'] |
joelriou assignee:joelriou |
208-70062 6 months ago |
230-19611 230 days ago |
60-67125 60 days |
| 30375 |
sinhp author:sinhp |
feat(CategoryTheory): Basics of Locally Cartesian Closed Categories |
Supersedes https://github.com/leanprover-community/mathlib4/pull/22321
This PR defines locally cartesian closed categories in terms of existence of the pushforward functors (right adjoint to the pullback functor) for all morphisms. We develop basic API and prove the following:
1. Existence of the pushforward functors is equivalent to cartesian closed slices.
2. Any locally cartesian closed category with a terminal object is cartesian closed.
3. The slices of a locally cartesian closed category are locally cartesian closed.
---
- [ ] depends on: #31033
- [ ] depends on: #30373
- [ ] depends on: #31332
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t-category-theory
merge-conflict
|
703/0 |
Mathlib.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/Basic.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/ChosenPullbacksAlong.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/ExponentiableMorphism.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/Sections.lean |
5 |
9 |
['Jlh18', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sinhp'] |
nobody |
188-5063 6 months ago |
276-11359 276 days ago |
0-2073 34 minutes |
| 29587 |
uniwuni author:uniwuni |
feat(GroupTheory/Finiteness): define finitely generated semigroups |
We define finitely generated semigroups and basics similarly to monoids and groups and prove that semigroups and monoids remain finitely generated when a congruence is quotiented out. This will be important when further developing semigroup theory.
---
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|
merge-conflict
t-group-theory
|
259/14 |
Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/GroupTheory/Finiteness.lean |
2 |
4 |
['github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'uniwuni'] |
dupuisf assignee:dupuisf |
175-26083 5 months ago |
277-30987 277 days ago |
25-78230 25 days |
| 29014 |
ShreckYe author:ShreckYe |
feat(Data/List/Scan): some theorems that relate `scanl` with `foldl` |
I am not sure which is the best form of `getElem_scanl_eq_foldl_take` here, so I added several alternative forms. Feel free to remove any of them if necessary. |
merge-conflict
t-data
|
35/0 |
Mathlib/Data/List/Scan.lean |
1 |
15 |
['ShreckYe', 'github-actions', 'mathlib4-merge-conflict-bot', 'themathqueen', 'vlad902'] |
pechersky assignee:pechersky |
171-5307 5 months ago |
244-56752 244 days ago |
74-62390 74 days |
| 9820 |
jjaassoonn author:jjaassoonn |
feat(RingTheory/GradedAlgebra/HomogeneousIdeal): generalize to homogeneous submodule |
The definitions, constructions and theorems in `HomogeneousIdeal.lean` are generalized to a homogeneous submodules.
So say $R$ is a ring and $M \cong \bigoplus_{i} M_i$ is an $R$-module. Then a homogeneous $R$-submodule of $M$ is an $R$-submodule $N$ such that for all $i$ and $n \in N$, $n_i \in N$. Note that this notion doesn't actually require $R$ to be graded and $M$ is a graded module. But for more interesting lemmas, we do need that $M$ is graded $R$-module. We bake the fact $R$ is graded into the definition of homogeneous submodule, otherwise, `CompleteLattice HomogeneousSubmodule` cannot find the order of synthesis (the proof depends on that $R$ is graded)
All definitions/constructions/theorems have a copy for ideals as well, this is to make sure dot notation still works.
The motivation of this generalization is graded quotient module
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-ring-theory
|
516/185 |
Mathlib/Algebra/Module/GradedModule.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Ideal.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Submodule.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean,scripts/nolints_prime_decls.txt |
7 |
3 |
['github-actions', 'leanprover-community-bot-assistant'] |
nobody |
153-31736 5 months ago |
372-54977 372 days ago |
52-60628 52 days |
| 34931 |
eric-wieser author:eric-wieser |
perf: make TensorProduct.lift irreducible with a unification hint |
---
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|
t-algebra
merge-conflict
label:t-algebra$ |
6/2 |
Mathlib/LinearAlgebra/TensorProduct/Basic.lean |
1 |
7 |
['eric-wieser', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] |
erdOne assignee:erdOne |
149-86156 4 months ago |
149-86157 149 days ago |
5-66655 5 days |
| 33020 |
FormulaRabbit81 author:FormulaRabbit81 |
chore(Topology): Deprecate file |
---
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- [x] depends on: #30851 deprecation
[](https://gitpod.io/from-referrer/)
|
t-topology
large-import
merge-conflict
|
82/49 |
Mathlib/Topology/Compactness/HilbertCubeEmbedding.lean,Mathlib/Topology/MetricSpace/HausdorffAlexandroff.lean,Mathlib/Topology/MetricSpace/PiNat.lean |
3 |
3 |
['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
147-62767 4 months ago |
206-50156 206 days ago |
0-14835 4 hours |
| 33281 |
michelsol author:michelsol |
feat(Analysis/SpecialFunctions/Integrals): integral of 1/sqrt(1-x^2) and its integrability. |
Add the integral of the derivative of arcsin and its integrability.
---
- [ ] depends on: #33280
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|
new-contributor
merge-conflict
t-analysis
|
59/0 |
Mathlib/Analysis/SpecialFunctions/Integrability/Basic.lean,Mathlib/Analysis/SpecialFunctions/Integrals/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean |
3 |
3 |
['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] |
nobody |
147-31561 4 months ago |
198-85786 198 days ago |
0-2872 47 minutes |
| 34156 |
zcyemi author:zcyemi |
feat(Analysis/Convex/Between): add lemmas on convex combination of mem simplex interior |
---
I add three lemmas of convex combinations preserving membership in the interior of a simplex.
And also open a zulip thread [#mathlib4 > Best place for convex combination and simplex interior](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Best.20place.20for.20convex.20combination.20and.20simplex.20interior/with/568558406)
deps:
- [ ] depends on: #33852 |
t-analysis
merge-conflict
|
170/0 |
Mathlib/Analysis/Convex/Between.lean,Mathlib/LinearAlgebra/AffineSpace/Independent.lean |
2 |
3 |
['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
147-7478 4 months ago |
147-7478 147 days ago |
0-2935 48 minutes |
| 25981 |
Multramate author:Multramate |
feat(GroupTheory/GroupAction/Basic): define homomorphisms of fixed subgroups induced by homomorphisms of groups |
This PR continues the work from #10126.
Original PR: https://github.com/leanprover-community/mathlib4/pull/10126 |
t-group-theory
large-import
merge-conflict
|
218/144 |
Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Ring/Action/Submonoid.lean,Mathlib/GroupTheory/FiniteAbelian/Duality.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/Maps.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/GroupTheory/PGroup.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/Transfer.lean,Mathlib/LinearAlgebra/RootSystem/WeylGroup.lean,Mathlib/NumberTheory/NumberField/CMField.lean,Mathlib/NumberTheory/NumberField/Ideal/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean |
16 |
8 |
['copilot-pull-request-reviewer', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
144-68005 4 months ago |
144-68005 144 days ago |
4-79090 4 days |
| 33795 |
alreadydone author:alreadydone |
feat(Topology/Sheaves): LocalPredicate prerequisite for étalé spaces |
---
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[](https://gitpod.io/from-referrer/)
|
t-topology
merge-conflict
|
418/143 |
Mathlib/AlgebraicGeometry/ProjectiveSpectrum/StructureSheaf.lean,Mathlib/Geometry/Manifold/Sheaf/Smooth.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Topology/Sheaves/LocalPredicate.lean,Mathlib/Topology/Sheaves/Sheafify.lean,Mathlib/Topology/Sheaves/Stalks.lean |
6 |
12 |
['adamtopaz', 'alreadydone', 'dagurtomas', 'github-actions', 'mathlib-merge-conflicts'] |
adamtopaz assignee:adamtopaz |
144-45639 4 months ago |
144-45640 144 days ago |
34-16498 34 days |
| 34674 |
Citronhat author:Citronhat |
feat(Algebra/Order/Ring): replace ENNReal lemmas with WithTop versions |
* Add `WithTop` versions of basic multiplicative order lemmas.
* Use the new `WithTop` lemmas to replace `ENNReal` proofs and address six TODOs.
* Fix a typo in the `pos_of_ne_zero` alias name. |
new-contributor
t-algebra
merge-conflict
label:t-algebra$ |
46/15 |
Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Data/ENNReal/Operations.lean |
3 |
5 |
['Citronhat', 'Ruben-VandeVelde', 'github-actions', 'mathlib-merge-conflicts'] |
Ruben-VandeVelde assignee:Ruben-VandeVelde |
144-25509 4 months ago |
144-25510 144 days ago |
17-1225 17 days |
| 33746 |
ster-oc author:ster-oc |
feat(Algebra/Module/ZLattice): align `ZSpan.floor` to `Int.floor` API |
This PR adds some of the existent lemmas about `Int.floor`, `Int.ceil` and `Int.fract` to the `ZSpan` namespace.
---
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|
t-algebra
new-contributor
merge-conflict
label:t-algebra$ |
353/145 |
Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Topology/Algebra/Order/Floor.lean |
3 |
8 |
['github-actions', 'joelriou', 'mathlib-merge-conflicts', 'ster-oc'] |
joelriou assignee:joelriou |
139-42407 4 months ago |
139-42407 139 days ago |
30-23357 30 days |
| 33791 |
PhoenixIra author:PhoenixIra |
feat: Generalization of FixedPointApproximants to CompletePartialOrder |
---
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This PR provides a generalization of FixedPointApproximants to CompletePartialOrder. Not every theorem can be generalized, as sometimes we require additional conditions (namely `x ≤ f x`) in order to guarantee that the set is directed and thus the supremum is well-defined. This is not necessary in a CompleteLattice.
[](https://gitpod.io/from-referrer/)
|
new-contributor
t-order
merge-conflict
|
223/100 |
Mathlib/Order/CompletePartialOrder.lean,Mathlib/SetTheory/Ordinal/FixedPointApproximants.lean |
2 |
21 |
['PhoenixIra', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] |
PhoenixIra and vihdzp assignee:PhoenixIra assignee:vihdzp |
134-79141 4 months ago |
134-79141 134 days ago |
38-12430 38 days |
| 26942 |
pechersky author:pechersky |
feat(RingTheory/Valuation/ValueGroupIso): isomorphism of value groups when compatible |
and also to the ValuativeRel's value group
by request from comment in
https://github.com/leanprover-community/mathlib4/pull/26754#issuecomment-3051770901
- [ ] depends on: #26588
---
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- [x] depends on: #26939
- [x] depends on: #26940
- [x] depends on: #26941 |
merge-conflict
t-ring-theory
t-order
|
299/3 |
Mathlib.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/Algebra/Order/GroupWithZero/Range.lean,Mathlib/Algebra/Order/GroupWithZero/WithZero.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/RingTheory/Valuation/ValueGroupIso.lean |
6 |
10 |
['faenuccio', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'pechersky'] |
faenuccio assignee:faenuccio |
132-23322 4 months ago |
332-8732 332 days ago |
10-67838 10 days |
| 14712 |
astrainfinita author:astrainfinita |
perf: change instance priority and order about `OfNat` |
---
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|
merge-conflict
slow-typeclass-synthesis
t-algebra
label:t-algebra$ |
49/20 |
Mathlib/Algebra/Group/Nat.lean,Mathlib/Algebra/Group/ZeroOne.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Data/BitVec.lean,Mathlib/Data/Nat/Cast/Defs.lean,Mathlib/Data/Rat/Defs.lean,Mathlib/Data/UInt.lean,Mathlib/NumberTheory/ArithmeticFunction.lean |
9 |
26 |
['MichaelStollBayreuth', 'astrainfinita', 'eric-wieser', 'fpvandoorn', 'github-actions', 'j-loreaux', 'leanprover-bot', 'mathlib-bors'] |
nobody |
128-22427 4 months ago |
703-597 703 days ago |
20-15089 20 days |
| 17627 |
hrmacbeth author:hrmacbeth |
feat: universal properties of vector bundle constructions |
Characterizations for the smoothness of maps into the total spaces of (1) the direct sum of two vector bundles; (2) the pullback of a vector bundle.
This gap in the library was exposed by #17358.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-differential-geometry
|
311/9 |
Mathlib/Data/Bundle.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/Pullback.lean,Mathlib/Topology/FiberBundle/Constructions.lean |
4 |
26 |
['PatrickMassot', 'fpvandoorn', 'github-actions', 'grunweg', 'hrmacbeth', 'j-loreaux', 'leanprover-community-bot-assistant', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'sgouezel'] |
grunweg assignee:grunweg |
128-22415 4 months ago |
388-22154 388 days ago |
91-68315 91 days |
| 27534 |
PierreQuinton author:PierreQuinton |
feat: a typeclass for `sSup`/`sInf` to be lawful |
Adds lawful infima and suprema type classes.
A preorder with lawful suprema: whenever a set has a least upper bound, `sSup` returns a least upper bound for that set.
A preorder with lawful infima: whenever a set has a greatest lower bound, `sInf` returns a greastest lower bound for that set.
---
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|
merge-conflict
t-order
|
121/8 |
Mathlib.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/LawfulSupInf.lean |
3 |
26 |
['PierreQuinton', 'YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] |
nobody |
120-7118 3 months ago |
235-38193 235 days ago |
114-38193 114 days |
| 35042 |
JovanGerb author:JovanGerb |
chore: remove `meta` form `import Mathlib.Tactic...` |
This PR cleans up some imports of the form `import Mathlib.Tactic...`, by either removing them entirely, or removing the `meta` keyword. It should never be necessary to `meta import` a file from `Mathlib.Tactic`, because the relevant definitions should already have been marked as `meta`.
The motivation is to reduce the amount of files that are `meta` imported when writing e.g. `import Mathlib`, hence reducing the amount of stuff that needs to be loaded. There are more other `meta import`s that need to be removed, but this PR is a good start.
---
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|
large-import
merge-conflict
|
61/142 |
Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/Group/Action/Hom.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/CategoryTheory/Functor/Basic.lean,Mathlib/Data/List/ChainOfFn.lean,Mathlib/Dynamics/OmegaLimit.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/DomAct/Basic.lean,Mathlib/Tactic/Algebraize.lean,Mathlib/Tactic/ApplyFun.lean,Mathlib/Tactic/ArithMult.lean,Mathlib/Tactic/Bound.lean,Mathlib/Tactic/CategoryTheory/Bicategory/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Bicategory/Normalize.lean,Mathlib/Tactic/CategoryTheory/Bicategory/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/CheckCompositions.lean,Mathlib/Tactic/CategoryTheory/Coherence/Basic.lean,Mathlib/Tactic/CategoryTheory/Coherence/Normalize.lean,Mathlib/Tactic/CategoryTheory/Coherence/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/Elementwise.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/ToApp.lean,Mathlib/Tactic/Choose.lean,Mathlib/Tactic/DeclarationNames.lean,Mathlib/Tactic/DefEqTransformations.lean,Mathlib/Tactic/DeriveCountable.lean,Mathlib/Tactic/DeriveFintype.lean,Mathlib/Tactic/DeriveTraversable.lean,Mathlib/Tactic/ENatToNat.lean,Mathlib/Tactic/Explode.lean,Mathlib/Tactic/Explode/Pretty.lean,Mathlib/Tactic/FinCases.lean,Mathlib/Tactic/FunProp.lean,Mathlib/Tactic/FunProp/Attr.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/FunctionData.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/FunProp/Types.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/GRewrite/Elab.lean,Mathlib/Tactic/Group.lean,Mathlib/Tactic/IrreducibleDef.lean,Mathlib/Tactic/Lift.lean,Mathlib/Tactic/Linarith.lean,Mathlib/Tactic/Linarith/Lemmas.lean,Mathlib/Tactic/Linarith/Oracle/FourierMotzkin.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm/Gauss.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm/SimplexAlgorithm.lean,Mathlib/Tactic/Linarith/Preprocessing.lean,Mathlib/Tactic/Linarith/Verification.lean,Mathlib/Tactic/LinearCombination/Lemmas.lean,Mathlib/Tactic/Linter/DeprecatedSyntaxLinter.lean,Mathlib/Tactic/Linter/DocPrime.lean,Mathlib/Tactic/Linter/DocString.lean,Mathlib/Tactic/Linter/EmptyLine.lean,Mathlib/Tactic/Linter/FlexibleLinter.lean,Mathlib/Tactic/Linter/GlobalAttributeIn.lean,Mathlib/Tactic/Linter/HashCommandLinter.lean,Mathlib/Tactic/Linter/Multigoal.lean,Mathlib/Tactic/Linter/OldObtain.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Linter/TextBased/UnicodeLinter.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,Mathlib/Tactic/Linter/UnusedTacticExtension.lean,Mathlib/Tactic/MinImports.lean,Mathlib/Tactic/MoveAdd.lean,Mathlib/Tactic/Nontriviality/Core.lean,Mathlib/Tactic/NormNum/DivMod.lean,Mathlib/Tactic/NormNum/Ineq.lean,Mathlib/Tactic/NormNum/Prime.lean,Mathlib/Tactic/Order.lean,Mathlib/Tactic/Order/CollectFacts.lean,Mathlib/Tactic/Order/Graph/Tarjan.lean,Mathlib/Tactic/PNatToNat.lean,Mathlib/Tactic/Peel.lean,Mathlib/Tactic/ProdAssoc.lean,Mathlib/Tactic/ProxyType.lean,Mathlib/Tactic/Push.lean,Mathlib/Tactic/Qify.lean,Mathlib/Tactic/RSuffices.lean,Mathlib/Tactic/Ring/Basic.lean,Mathlib/Tactic/Ring/Common.lean,Mathlib/Tactic/Ring/Compare.lean,Mathlib/Tactic/Ring/PNat.lean,Mathlib/Tactic/Simproc/Divisors.lean,Mathlib/Tactic/Simproc/FinsetInterval.lean,Mathlib/Tactic/Simps/Basic.lean,Mathlib/Tactic/Subsingleton.lean,Mathlib/Tactic/TacticAnalysis/Declarations.lean,Mathlib/Tactic/TautoSet.lean,Mathlib/Tactic/Translate/Core.lean,Mathlib/Tactic/Translate/TagUnfoldBoundary.lean,Mathlib/Tactic/Widget/Calc.lean,Mathlib/Tactic/Widget/CommDiag.lean,Mathlib/Tactic/Widget/CongrM.lean |
107 |
9 |
['JovanGerb', 'dupuisf', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] |
robin-carlier assignee:robin-carlier |
118-35663 3 months ago |
118-35664 118 days ago |
26-74403 26 days |
| 32918 |
michelsol author:michelsol |
feat: define `supEdist` and `supDist` |
Create a new file Topology.MetricSpace.SupDistance and define the supremal distance in (extended) metric spaces. The defined `supEdist` and `supDist` will have similar theory to the already existing `infEdist` and `infDist`. The motivation is to be able to define the radius of a minimal bounding sphere as the infimum of the supDist later.
[zulip discussion here](https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Formalizing.20Jung's.20theorem.20and.20minimal.20bounding.20spheres) |
t-topology
new-contributor
merge-conflict
|
75/0 |
Mathlib.lean,Mathlib/Topology/MetricSpace/SupDistance.lean |
2 |
5 |
['github-actions', 'mathlib4-merge-conflict-bot', 'michelsol', 'urkud'] |
nobody |
113-15485 3 months ago |
187-80445 187 days ago |
21-3598 21 days |
| 31595 |
astrainfinita author:astrainfinita |
chore: redefine `Ideal.IsPrime` |
Redefine `Ideal.IsPrime` to make it correct for non-commutative cases
---
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|
t-algebra
merge-conflict
label:t-algebra$ |
333/100 |
Mathlib/Algebra/Order/Ring/Ordering/Defs.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Basic.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Maximal.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Noetherian.lean,Mathlib/RingTheory/Ideal/Oka.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/Ideal/Pointwise.lean,Mathlib/RingTheory/Ideal/Prime.lean,Mathlib/RingTheory/Ideal/Prod.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/IsPrimary.lean,Mathlib/RingTheory/Localization/AtPrime/Basic.lean,Mathlib/RingTheory/Localization/Ideal.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/PrincipalIdealDomain.lean,Mathlib/RingTheory/Spectrum/Prime/Topology.lean,Mathlib/RingTheory/Valuation/Basic.lean |
22 |
33 |
['alreadydone', 'artie2000', 'astrainfinita', 'erdOne', 'github-actions', 'leanprover-bot', 'leanprover-radar', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] |
kim-em assignee:kim-em |
105-48624 3 months ago |
105-48625 105 days ago |
59-67698 59 days |
| 11964 |
adamtopaz author:adamtopaz |
feat: The functor of points of a scheme |
We construct the functor of points functor, and prove that it's full and faithful.
---
- [x] depends on: #11947
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merge-conflict
t-algebraic-geometry
t-category-theory
|
210/0 |
Mathlib.lean,Mathlib/AlgebraicGeometry/FunctorOfPoints.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean |
3 |
4 |
['github-actions', 'grunweg'] |
nobody |
100-26858 3 months ago |
821-10244 821 days ago |
0-1223 20 minutes |
| 33434 |
astrainfinita author:astrainfinita |
chore: redefine `Finsupp.indicator` using `Finsupp.onFinset` |
---
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t-data
merge-conflict
|
6/17 |
Mathlib/Data/Finsupp/Indicator.lean |
1 |
2 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
93-80156 3 months ago |
93-80157 93 days ago |
5-59263 5 days |
| 6777 |
adomani author:adomani |
chore(Co*variantClass): replace eta-expanded (· * ·), (· + ·), (· ≤ ·), (· < ·) |
Replace `CovariantClass X X (· * ·) (· ≤ ·)` with -> `CovariantClass X X HMul.hMul LE.le` and similarly for `HAdd`, `LT`, `Contravariant`.
This PR is inspired by [Issue #6646](https://github.com/leanprover-community/mathlib4/issues/6646) and, more specifically, [this comment](https://github.com/leanprover-community/mathlib4/issues/6646#issuecomment-1692792066).
Note that https://github.com/leanprover/lean4/pull/2267 would make this unnecessary
---
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```bash
# First sed command:
# the first captured pattern is `Co*variantClass <type> <type> `
# the second captured pattern is `<type>`
# the third captured pattern is `+` or `*`
# the fourth captured pattern is `<` or `≤`
# a match for `Co*variantClass <type> <type> (· <op> ·) (· <rel> ·)` becomes
# `Co*variantClass <type> <type> replaceop<op> replaceop<rel>`
# Second sed command: similar to the first, but looks for `(Function.swap (· <op> ·))`
sed -i '
s=\(Co[ntra]*variantClass \(..*\) \2 \)(· *\([+*]\) *·) (· *\([<≤]\) *·)=\1replaceop\3 replaceop\4=g
s=\(Co[ntra]*variantClass \(..*\) \2 \)(\([Functio\.swap ]*\)(· *\([+*]\) *·)) (· *\([<≤]\) *·)=\1(\3replaceop\4) replaceop\5=g
s=replaceop+=HAdd.hAdd=g
s=replaceop\*=HMul.hMul=g
s=replaceop<=LT.lt=g
s=replaceop≤=LE.le=g
s=\(Co[ntra]*variantClass N N\) (· \* ·) r=\1 HMul.hMul r=g
s=\(Co[ntra]*variantClass N N (swap μ)\) (· ≤ ·)=\1 LE.le=g
s=\(Co[ntra]*variantClass N N\) (swap (· \* ·)) r=\1 (swap HMul.hMul) r=g
s=\(CovariantClass (Filter α) (Filter α)\) (· / ·) (· ≤ ·)=\1 HDiv.hDiv LE.le=g
s=\(CovariantClass (Filter α) (Filter α)\) (swap (· / ·)) (· ≤ ·)=\1 (swap HDiv.hDiv) LE.le=g
s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· ≤ ·)=\1 LE.le=g
s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· < ·)=\1 LT.lt=g
s=\(Co[ntra]*variantClass [^}]*\) (· ≤ ·)=\1 LE.le=g
s=\(CovariantClass .* (Filter β)\) (· • ·) LE.le=\1 HSMul.hSMul LE.le=g
' $(git ls-files '*.lean')
```
[](https://gitpod.io/from-referrer/)
|
merge-conflict |
703/678 |
Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/Bounds.lean,Mathlib/Algebra/CovariantAndContravariant.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/GroupPower/Order.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/Archimedean.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Group/DenselyOrdered.lean,Mathlib/Algebra/Order/Group/MinMax.lean,Mathlib/Algebra/Order/Group/OrderIso.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Interval.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/LatticeGroup.lean,Mathlib/Algebra/Order/Module.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Cancel/Defs.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/Lemmas.lean,Mathlib/Algebra/Order/Monoid/MinMax.lean,Mathlib/Algebra/Order/Monoid/NatCast.lean,Mathlib/Algebra/Order/Monoid/OrderDual.lean,Mathlib/Algebra/Order/Monoid/Prod.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithZero/Basic.lean,Mathlib/Algebra/Order/Monoid/WithZero/Defs.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Pointwise.lean,Mathlib/Algebra/Order/Positive/Ring.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Lemmas.lean,Mathlib/Algebra/Order/Sub/Basic.lean,Mathlib/Algebra/Order/Sub/Canonical.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Algebra/Order/WithZero.lean,Mathlib/Algebra/Parity.lean,Mathlib/Algebra/Star/Order.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Normed/Order/Lattice.lean,Mathlib/Data/DFinsupp/Lex.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/List/BigOperators/Basic.lean,Mathlib/Data/List/BigOperators/Lemmas.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Nat/Cast/Order.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/Real/ENNReal.lean,Mathlib/Data/Real/NNReal.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/Data/Sign.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/VectorMeasure.lean,Mathlib/Order/ConditionallyCompleteLattice/Group.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Martingale/Basic.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/PGame.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/NaturalOps.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/Positivity/Basic.lean,Mathlib/Topology/ContinuousFunction/Algebra.lean,lean-toolchain,test/Recall.lean,test/propose.lean |
81 |
37 |
['adomani', 'alreadydone', 'digama0', 'eric-wieser', 'ericrbg', 'jcommelin', 'leanprover-bot', 'sgouezel', 'vihdzp'] |
nobody |
86-52792 2 months ago |
986-2552 986 days ago |
35-63136 35 days |
| 37530 |
mcdoll author:mcdoll |
fix(Topology/Algebra): fix bad simps and make arguments implicit for `PointwiseConvergenceCLM` |
We delete all `simps` calls in the definitions of operators on `PointwiseConvergenceCLM` and replace them with `apply_apply` lemmas that do not abuse the defeq between `SLₚₜ` and `SL`. This made the linter discover some typeclass duplications, which we remove by restructuring the file.
As a consequence of the new `simp` lemmas, we can remove all `set_option backward.isDefEq.respectTransparency false in` in `Analysis.Distribution.TemperedDistribution`.
Moreover, we make several arguments implicit, which can be inferred in almost all practical situations.
---
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|
not-ready-to-merge
merge-conflict
|
88/69 |
Mathlib/Analysis/Distribution/TemperedDistribution.lean,Mathlib/Topology/Algebra/Module/Spaces/PointwiseConvergenceCLM.lean |
2 |
5 |
['github-actions', 'jcommelin', 'mathlib-merge-conflicts', 'mcdoll'] |
nobody |
84-42361 2 months ago |
84-42362 84 days ago |
14-59669 14 days |
| 38239 |
vihdzp author:vihdzp |
chore(Order/SuccPred/Limit): reorganize sections |
In an effort to keep the file better organized, we move theorems which use `SuccOrder`/`PredOrder` as an assumption to a new section.
No theorems have been changed.
---
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[](https://gitpod.io/from-referrer/)
|
t-order
merge-conflict
|
95/110 |
Mathlib/Order/SuccPred/Limit.lean |
1 |
2 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
81-71938 2 months ago |
81-71939 81 days ago |
2-48556 2 days |
| 37461 |
grunweg author:grunweg |
chore: golf using the field tactic |
---
In the spirit of #31314.
<!-- Your PR title will become the first line of the commit message.
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[](https://gitpod.io/from-referrer/)
|
merge-conflict |
32/43 |
Counterexamples/NowhereDifferentiable.lean,Mathlib/Analysis/Calculus/Monotone.lean,Mathlib/Analysis/Complex/BorelCaratheodory.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/Normed/Field/Lemmas.lean,Mathlib/Analysis/SpecialFunctions/Complex/LogBounds.lean,Mathlib/Analysis/SpecialFunctions/Elliptic/Weierstrass.lean,Mathlib/Analysis/SpecialFunctions/Integrals/Basic.lean,Mathlib/InformationTheory/KullbackLeibler/Basic.lean,Mathlib/LinearAlgebra/Lagrange.lean,Mathlib/MeasureTheory/Integral/MeanValue.lean,Mathlib/NumberTheory/ModularForms/Discriminant.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2/Defs.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2/MDifferentiable.lean,Mathlib/NumberTheory/ModularForms/QExpansion.lean,Mathlib/Probability/CentralLimitTheorem.lean,Mathlib/Probability/Distributions/Gaussian/CharFun.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/Hilbert90.lean,Mathlib/RingTheory/PowerSeries/Exp.lean,Mathlib/Topology/UnitInterval.lean |
20 |
5 |
['github-actions', 'grunweg', 'j-loreaux', 'mathlib-merge-conflicts'] |
nobody |
79-71642 2 months ago |
79-71643 79 days ago |
22-59925 22 days |
| 37774 |
weisbrja author:weisbrja |
fix: change variables in `bicompl` to `Sort*` and add missing theorem mentioned in `bicompl` docs |
[#mathlib4 > Why does Mathlib use Type* instead of Sort* in some places?](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Why.20does.20Mathlib.20use.20Type.2A.20instead.20of.20Sort.2A.20in.20some.20places.3F/with/583882342)
---
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|
new-contributor
t-logic
merge-conflict
|
6/1 |
Mathlib/Logic/Function/Basic.lean |
1 |
8 |
['github-actions', 'kbuzzard', 'leanprover-radar', 'mathlib-merge-conflicts', 'weisbrja'] |
nobody |
75-85270 2 months ago |
75-85271 75 days ago |
19-76858 19 days |
| 33478 |
anishrajeev author:anishrajeev |
feat(ModelTheory): define a subset of the topology over complete types |
Define a subset of the Stone Space over a language expanded with countably many constants. Define the proposition to indicate if a language is countable. The subset's density and openness is a future goal to prove (have a branch where it is almost finished), in pursuit of formalizing the proof of the Omitting Types Theorem via properties of Baire spaces.
- [ ] depends on: #32215
- [ ] depends on: #32546 |
t-logic
merge-conflict
new-contributor
|
160/1 |
Mathlib.lean,Mathlib/ModelTheory/Topology/Types.lean,Mathlib/ModelTheory/Types.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean |
4 |
8 |
['NoneMore', 'anishrajeev', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'tb65536'] |
nobody |
74-5795 2 months ago |
181-19336 181 days ago |
10-38484 10 days |
| 36740 |
euprunin author:euprunin |
chore: golf using `grind` |
The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective.
Trace profiling results (differences <30 ms considered measurement noise):
* `AlgebraicGeometry.Scheme.isBasis_affineOpens`: unchanged 🎉
* `SimpleGraph.Walk.takeUntil_eq_take`: 263 ms before, 180 ms after 🎉
* `SimpleGraph.Walk.dropUntil_eq_drop`: 382 ms before, 261 ms after 🎉
* `Int.image_Ico_emod`: unchanged 🎉
* `Equiv.Perm.ofSubtype_swap_eq`: unchanged 🎉
Profiled using `set_option trace.profiler true in`.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict |
7/33 |
Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Data/Int/Interval.lean,Mathlib/GroupTheory/Perm/Support.lean |
4 |
8 |
['artie2000', 'chenson2018', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
73-74733 2 months ago |
73-74734 73 days ago |
43-5868 43 days |
| 38329 |
jcommelin author:jcommelin |
chore: tighten down public/exposed API of AlgebraicClosure |
This PR tightens down the API of AlgebraicClosure,
by making few parts of FieldTheory/IsAlgClosed/AlgebraicClosure.lean
public and/or exposed.
We still need to expose the main definition.
It would be great if we can unexpose it in the future.
---
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|
t-algebra
merge-conflict
label:t-algebra$ |
73/53 |
Mathlib/Algebra/Lie/TraceForm.lean,Mathlib/FieldTheory/AxGrothendieck.lean,Mathlib/FieldTheory/Differential/Liouville.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/ModelTheory/Algebra/Field/IsAlgClosed.lean,Mathlib/RingTheory/Discriminant.lean,Mathlib/RingTheory/IntegralClosure/IntegralRestrict.lean,Mathlib/RingTheory/Norm/Transitivity.lean,Mathlib/RingTheory/Trace/Basic.lean |
9 |
26 |
['eric-wieser', 'github-actions', 'jcommelin', 'kbuzzard', 'leanprover-radar', 'mathlib-merge-conflicts', 'plp127', 'riccardobrasca'] |
nobody |
73-66106 2 months ago |
73-66107 73 days ago |
7-41851 7 days |
| 36495 |
AlexKontorovich author:AlexKontorovich |
chore(Finset/NatDivisors): refactor `card_divisors_mul` and `sum_divisors_mul` to not rely on `ArithmeticFunction` |
`Nat.Coprime.card_divisors_mul` and `Nat.Coprime.sum_divisors_mul` are moved to not rely on `ArithmeticFunction`. See zulip discussion here: [#mathlib4 > Library design question, e.g.`Nat.Coprime.card_divisors_mul` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Library.20design.20question.2C.20e.2Eg.2E.60Nat.2ECoprime.2Ecard_divisors_mul.60/near/577769899)
Co-authored-by: Ziyan Wei <zw810@scarletmail.rutgers.edu> and Aayush Rajasekaran <arajasek94@gmail.com>
---
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|
large-import
t-number-theory
t-algebra
merge-conflict
label:t-algebra$ |
41/14 |
Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Data/Finset/NatDivisors.lean,Mathlib/NumberTheory/ArithmeticFunction/Misc.lean |
3 |
6 |
['AlexKontorovich', 'arajasek', 'github-actions', 'mathlib-merge-conflicts'] |
riccardobrasca assignee:riccardobrasca |
64-78651 2 months ago |
64-78652 64 days ago |
53-21240 53 days |
| 37553 |
grunweg author:grunweg |
chore: golf using .ne and friends |
ne_of_gt -> .ne'
ne_of_lt -> .ne
le_of_lt -> .le
Drive-by golfs using gcongr and positivity and been split into separate PRs.
---
- [x] depends on: #37462
- [x] depends on: #37715
- [x] depends on: #37554
- [x] depends on: #37845
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|
merge-conflict |
302/321 |
Archive/Imo/Imo1981Q3.lean,Archive/Imo/Imo2011Q3.lean,Archive/Imo/Imo2013Q5.lean,Archive/Imo/Imo2019Q4.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Counterexamples/DiscreteTopologyNonDiscreteUniformity.lean,Counterexamples/NowhereDifferentiable.lean,Counterexamples/TopologistsSineCurve.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/CharP/Defs.lean,Mathlib/Algebra/Group/Fin/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Finite.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Covolume.lean,Mathlib/Algebra/Order/Antidiag/Nat.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/BigOperators/Group/Multiset.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Order/CauSeq/BigOperators.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/GroupWithZero/Range.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Basic.lean,Mathlib/Algebra/Order/Interval/Set/Instances.lean,Mathlib/Algebra/Order/Module/HahnEmbedding.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Algebra/Order/Round.lean,Mathlib/Algebra/Order/ToIntervalMod.lean,Mathlib/Algebra/Polynomial/DenomsClearable.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/QuadraticDiscriminant.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Proper.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Analytic/OfScalars.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Asymptotics/ExpGrowth.lean,Mathlib/Analysis/Asymptotics/LinearGrowth.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Tagged.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/DerivativeTest.lean,Mathlib/Analysis/Calculus/FDeriv/Extend.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Defs.lean,Mathlib/Analysis/Calculus/LHopital.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Complex/OpenMapping.lean,Mathlib/Analysis/Complex/Poisson.lean,Mathlib/Analysis/Complex/Trigonometric.lean,Mathlib/Analysis/Convex/Between.lean,Mathlib/Analysis/Convex/Caratheodory.lean,Mathlib/Analysis/Convex/Combination.lean,Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Convex/Radon.lean,Mathlib/Analysis/Convex/SpecificFunctions/Deriv.lean,Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/InnerProductSpace/Subspace.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/MeanInequalitiesPow.lean,Mathlib/Analysis/MellinInversion.lean,Mathlib/Analysis/MellinTransform.lean,Mathlib/Analysis/Normed/Field/Approximation.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/Normed/Operator/ContinuousAlgEquiv.lean,Mathlib/Analysis/Normed/Ring/Units.lean,Mathlib/Analysis/Normed/Unbundled/IsPowMulFaithful.lean,Mathlib/Analysis/Normed/Unbundled/SmoothingSeminorm.lean,Mathlib/Analysis/Normed/Unbundled/SpectralNorm.lean,Mathlib/Analysis/Oscillation.lean,Mathlib/Analysis/Real/Hyperreal.lean,Mathlib/Analysis/Real/Pi/Bounds.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/IntegralRepresentation.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/PolarCoord.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Data/EReal/Inv.lean,Mathlib/Data/Finset/Image.lean,Mathlib/Data/Int/Interval.lean,Mathlib/Data/Int/ModEq.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Nat/Log.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Real/ConjExponents.lean,Mathlib/Dynamics/Circle/RotationNumber/TranslationNumber.lean |
114 |
7 |
['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
59-65622 1 month ago |
59-65622 59 days ago |
13-66876 13 days |
| 39229 |
grunweg author:grunweg |
dev: towards `fun_prop` on manifolds |
---
- [ ] depends on: #39226
Rebased version of #31580. Meant to be a prototype that demonstrate how this could possibly work.
Not functional yet; waiting on cache to continue.
<!-- Your PR title will become the first line of the commit message.
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|
t-meta
merge-conflict
|
305/1 |
Mathlib/Geometry/Manifold/Notation.lean,Mathlib/Tactic/FunProp/Core.lean,MathlibTest/DifferentialGeometry/FunPropM.lean,MathlibTest/fun_prop_dev.lean |
4 |
4 |
['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
57-46512 1 month ago |
61-60084 61 days ago |
0-12 12 seconds |
| 39329 |
lecopivo author:lecopivo |
feat(fun_prop): eager application of transition theorems for fun_prop |
For properties like Integrable we want to apply transition theorems(like Continuous -> Integrable) eagerly
---
This is a change necessary in preparation for making `fun_prop` work for integrability.
-->
[](https://gitpod.io/from-referrer/)
|
t-meta
merge-conflict
|
93/30 |
Mathlib/Tactic/FunProp/Attr.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/Decl.lean,MathlibTest/FunPropMinimal.lean |
4 |
14 |
['b-mehta', 'github-actions', 'lecopivo', 'mathlib-merge-conflicts'] |
JovanGerb assignee:JovanGerb |
55-6930 1 month ago |
57-20878 57 days ago |
1-47071 1 day |
| 37584 |
kennethgoodman author:kennethgoodman |
feat(Data/Nat/Fib): formalize Lamé's theorem |
## Summary
Formalize [Lamé's theorem](https://en.wikipedia.org/wiki/Lam%C3%A9%27s_theorem) (1844), the founding result of computational complexity theory.
**Lamé's Theorem:** If the Euclidean algorithm on inputs `(a, b)` with `b ≤ a` takes `n + 1` division steps, then `b ≥ fib(n + 1)` and `a ≥ fib(n + 2)`.
### New definitions
- `Nat.euclidSteps`: counts the number of division steps in the Euclidean algorithm on natural number inputs.
### New theorems
- `Nat.fib_le_of_euclidSteps`: the main Lamé bound — Fibonacci lower bound on inputs given a step count.
- `Nat.euclidSteps_le_of_lt_fib`: the contrapositive — step count upper bound given a Fibonacci bound on the smaller input.
- `Nat.add_mod_le`: helper lemma that `b + a % b ≤ a` when `b ≤ a` and `0 < b`.
### Proof strategy
Induction on `n`, tracking both elements of the pair. The key insight is that each Euclidean step replaces `(a, b)` with `(b, a % b)`, and since `a ≥ b + a % b` (because `a / b ≥ 1`), the Fibonacci recurrence `fib(n+3) = fib(n+2) + fib(n+1)` matches the structure of the algorithm.
### References
- Gabriel Lamé, *Note sur la limite du nombre des divisions dans la recherche du plus grand commun diviseur entre deux nombres entiers*, Comptes rendus de l'Académie des sciences, 1844.
---
### AI usage disclosure
Per the [Mathlib AI guidelines](https://leanprover-community.github.io/contribute/index.html#use-of-ai): Claude Code (Claude Opus 4.6) was used to assist with writing the Lean 4 proof code, fixing tactic errors, and drafting this PR description. The mathematical proof (induction on step count, tracking both pair elements through the Fibonacci recurrence) was designed by hand and verified on paper before formalization. I have reviewed and understand every line of the resulting Lean code and can explain all proof steps.
---
- [x] builds cleanly (`lake build Mathlib.Data.Nat.Fib.Lame`)
- [x] no `sorry`
- [x] lines ≤ 100 characters, no trailing whitespace
- [x] `autoImplicit false`
- [x] docstrings on all public declarations |
new-contributor
LLM-generated
t-data
merge-conflict
|
121/0 |
Mathlib.lean,Mathlib/Data/Nat/Basic.lean,Mathlib/Data/Nat/Fib/Basic.lean,Mathlib/Data/Nat/Fib/Lame.lean,docs/1000.yaml |
5 |
25 |
['euprunin', 'github-actions', 'kennethgoodman', 'mathlib-merge-conflicts', 'vihdzp', 'wwylele'] |
TwoFX assignee:TwoFX |
54-82003 1 month ago |
54-82004 54 days ago |
44-66371 44 days |
| 39509 |
mcdoll author:mcdoll |
chore(Topology): add `push/pull_end` tags for CLMs |
Simpsets were introduced in #38359, see also #39508
---
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t-topology
merge-conflict
|
2/0 |
Mathlib/Topology/Algebra/Module/LinearMap.lean |
1 |
2 |
['github-actions', 'mathlib-merge-conflicts'] |
j-loreaux assignee:j-loreaux |
52-61503 1 month ago |
52-65551 52 days ago |
3-40182 3 days |
| 36774 |
euprunin author:euprunin |
chore: replace long terminal `rw […]`:s (≥4 lemmas) with bare `simp`:s |
The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective.
Trace profiling results (differences <30 ms considered measurement noise):
* `Finset.lcm_union`: unchanged 🎉
* `Finset.gcd_union`: unchanged 🎉
* `Polynomial.derivative_eval₂_C`: unchanged 🎉
* `Polynomial.expand_pow`: unchanged 🎉
* `Cardinal.mk_real`: unchanged 🎉
* `Real.log_zpow`: unchanged 🎉
* `Matroid.eRank_le_encard_add_eRk_compl`: unchanged 🎉
* `DFinsupp.single_tsub`: unchanged 🎉
* `EReal.inv_neg`: unchanged 🎉
* `Finsupp.toMultiset_map`: unchanged 🎉
* `Finsupp.single_tsub`: unchanged 🎉
* `Multiset.countP_map`: unchanged 🎉
* `Nat.ascFactorial_eq_factorial_mul_choose'`: unchanged 🎉
* `Real.sign_intCast`: unchanged 🎉
* `Real.volume_eball`: unchanged 🎉
* `Real.volume_closedEBall`: unchanged 🎉
* `LFunction_ne_zero_of_not_quadratic_or_ne_one`: 295 ms before, 152 ms after 🎉
* `hasSum_one_div_nat_pow_mul_cos`: unchanged 🎉
* `inv_eq_of_aeval_divX_ne_zero`: unchanged 🎉
* `AlgebraicIndependent.aeval_comp_mvPolynomialOptionEquivPolynomialAdjoin`: unchanged 🎉
* `Ordinal.deriv_mul_eq_opow_omega0_mul`: unchanged 🎉
Profiled using `set_option trace.profiler true in`.
---
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|
merge-conflict |
22/24 |
Mathlib/Algebra/GCDMonoid/Finset.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Expand.lean,Mathlib/Analysis/Real/Cardinality.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Combinatorics/Matroid/Rank/ENat.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/EReal/Inv.lean,Mathlib/Data/Finsupp/Multiset.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Multiset/Filter.lean,Mathlib/Data/Nat/Choose/Basic.lean,Mathlib/Data/Real/Sign.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/NumberTheory/LSeries/Nonvanishing.lean,Mathlib/NumberTheory/ZetaValues.lean,Mathlib/RingTheory/Algebraic/Basic.lean,Mathlib/RingTheory/AlgebraicIndependent/Basic.lean,Mathlib/SetTheory/Ordinal/FixedPoint.lean |
19 |
3 |
['artie2000', 'euprunin', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
50-4540 1 month ago |
50-4541 50 days ago |
67-395 67 days |
| 16074 |
Rida-Hamadani author:Rida-Hamadani |
feat: combinatorial maps and planar graphs |
We define combinatorial maps, then we define planar graph using combinatorial maps.
---
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|
merge-conflict
t-combinatorics
|
243/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Planar.lean,Mathlib/Data/CombinatorialMap.lean |
3 |
30 |
['MrBrain295', 'Parcly-Taxel', 'Rida-Hamadani', 'github-actions', 'lambda-fairy', 'leanprover-community-bot-assistant'] |
kmill assignee:kmill |
47-56073 1 month ago |
372-52506 372 days ago |
72-50365 72 days |
| 38989 |
grunweg author:grunweg |
chore: remove `(d)simp only []` |
Either remove them (when they were unnecessary), or replace by something more low-level.
---
I'm happy to make them `simp only` instead, if that is preferred.
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|
merge-conflict |
10/17 |
Counterexamples/AharoniKorman.lean,Mathlib/Analysis/SpecialFunctions/Integrals/PosLogEqCircleAverage.lean,Mathlib/CategoryTheory/Limits/Fubini.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/RE.lean,Mathlib/Computability/TuringMachine/Config.lean,Mathlib/Computability/TuringMachine/StackTuringMachine.lean,Mathlib/LinearAlgebra/Matrix/Basis.lean,Mathlib/MeasureTheory/Covering/Besicovitch.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/ModelTheory/Encoding.lean |
11 |
5 |
['b-mehta', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] |
nobody |
46-65748 1 month ago |
46-65749 46 days ago |
20-56482 20 days |
| 39676 |
joneugster author:joneugster |
chore: move test files and recapitalise filennames |
Continuation of #39674. Renames all test files to use UpperCamelCase. Moves a few files to a folder according to the location of the tested file.
---
While fixing capitalisation on all filenames, this PR makes no effort to sort all test files into according folders. This will be happening in follow-ups.
- [x] depends on: #39681
- [x] depends on: #39682
- [ ] depends on: #39683
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|
file-removed
merge-conflict
|
22/22 |
MathlibTest/AesopCat.lean,MathlibTest/Algebra/Algebra/Rat.lean,MathlibTest/Algebra/Polynomial.lean,MathlibTest/Algebra/Quaternion.lean,MathlibTest/Data/DFinsupp/DFinsuppMultiLinear.lean,MathlibTest/Data/DFinsupp/Notation.lean,MathlibTest/Data/Fin/VecNotation.lean,MathlibTest/Data/FunLike.lean,MathlibTest/Data/Real.lean,MathlibTest/Data/ZMod.lean,MathlibTest/DeriveCountable.lean,MathlibTest/DeriveCountableModule.lean,MathlibTest/DeriveEncodable.lean,MathlibTest/ENatToNat.lean,MathlibTest/EvalElab.lean,MathlibTest/FailIfNoProgress.lean,MathlibTest/FastInstance.lean,MathlibTest/FinsetBuilder.lean,MathlibTest/FinsetRepr.lean,MathlibTest/FinsuppNotation.lean,MathlibTest/FormatTable.lean,MathlibTest/ImportAll.lean,MathlibTest/InstanceDiamonds.lean,MathlibTest/InstanceDiamonds/Analysis/Normed/Field/WithAbs.lean,MathlibTest/InstanceDiamonds/Data/Complex/Module.lean,MathlibTest/InstanceDiamonds/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,MathlibTest/InstanceDiamonds/FieldTheory/SplittingField/Construction.lean,MathlibTest/InstanceDiamonds/Normed.lean,MathlibTest/JacobiSymbol.lean,MathlibTest/Lean/Tactic/Grind/AC.lean,MathlibTest/Lean/Tactic/Grind/CC.lean,MathlibTest/Lean/Tactic/Grind/Field.lean,MathlibTest/Lean/Tactic/Grind/FieldInstance.lean,MathlibTest/Lean/Tactic/Grind/Grobner.lean,MathlibTest/Lean/Tactic/Grind/Linarith.lean,MathlibTest/Lean/Tactic/Grind/Lint.lean,MathlibTest/Lean/Tactic/Grind/NatCastInstance.lean,MathlibTest/Lean/Tactic/Grind/OrderedRing.lean,MathlibTest/Lean/Tactic/Grind/PairwiseDisjoint.lean,MathlibTest/Lean/Tactic/Grind/Panic.lean,MathlibTest/Lean/Tactic/Grind/Ring.lean,MathlibTest/Lean/Tactic/Grind/Set.lean,MathlibTest/Lean/Tactic/Grind/Trig.lean,MathlibTest/Lean/Tactic/Rewrites.lean,MathlibTest/Linter/DeprecatedModule/DeprecatedModule.lean,MathlibTest/Linter/DeprecatedModule/DeprecatedModuleAllTest.lean,MathlibTest/Linter/DeprecatedModule/DeprecatedModuleMetaTest.lean,MathlibTest/Linter/DeprecatedModule/DeprecatedModuleNew.lean,MathlibTest/Linter/DeprecatedModule/DeprecatedModulePublicMetaTest.lean,MathlibTest/Linter/DeprecatedModule/DeprecatedModulePublicTest.lean,MathlibTest/Linter/DeprecatedModule/DeprecatedModuleTest.lean,MathlibTest/Linter/DeprecatedSyntaxLinter.lean,MathlibTest/Linter/DocPrime.lean,MathlibTest/Linter/DocString.lean,MathlibTest/Linter/EmptyLine.lean,MathlibTest/Linter/FlexibleLinter.lean,MathlibTest/Linter/ForbiddenModuleNames.lean,MathlibTest/Linter/HaveLetLinter.lean,MathlibTest/Linter/ImportHeavyFlexibleLinter.lean,MathlibTest/Linter/Lint.lean,MathlibTest/Linter/ModuleCasing.lean,MathlibTest/Linter/OldObtain.lean,MathlibTest/Linter/PrivateModuleLinter/HasOnlyPrivate.lean,MathlibTest/Linter/PrivateModuleLinter/HasPublic.lean,MathlibTest/Linter/PrivateModuleLinter/ImportOnly.lean,MathlibTest/Linter/PrivateModuleLinter/Initialize.lean,MathlibTest/Linter/PrivateModuleLinter/NonModule.lean,MathlibTest/Linter/PrivateModuleLinter/Notation3.lean,MathlibTest/Linter/PrivateModuleLinter/ReservedName1.lean,MathlibTest/Linter/PrivateModuleLinter/ReservedName2.lean,MathlibTest/Linter/Style/LintStyle.lean,MathlibTest/Linter/Style/LongFile.lean,MathlibTest/Linter/UnusedTactic/AesopUnusedTactic.lean,MathlibTest/Linter/UnusedTactic/UnusedTactic.lean,MathlibTest/Linter/ValidatePRTitle.lean,MathlibTest/Linter/VersoHeader.lean,MathlibTest/Linter/Whitespace.lean,MathlibTest/NormCast.lean,MathlibTest/RegisterTryTactic.lean,MathlibTest/RightActions.lean,MathlibTest/SetLike.lean,MathlibTest/SimpConfluence.lean,MathlibTest/SlimCheck.lean,MathlibTest/SlowInstances.lean,MathlibTest/SlowSimp.lean,MathlibTest/Tactic/ApplyCongr.lean,MathlibTest/Tactic/ApplyFun.lean,MathlibTest/Tactic/ApplyRules.lean,MathlibTest/Tactic/ApplyWith.lean,MathlibTest/Tactic/Bound/Attribute.lean,MathlibTest/Tactic/Bound/Bound.lean,MathlibTest/Tactic/ByContra.lean,MathlibTest/Tactic/CancelDenoms.lean,MathlibTest/Tactic/Cases.lean,MathlibTest/Tactic/CasesM.lean,MathlibTest/Tactic/Change.lean,MathlibTest/Tactic/Check.lean,MathlibTest/Tactic/Choose/Choose.lean,MathlibTest/Tactic/Choose/Reduction.lean,MathlibTest/Tactic/Clean.lean |
192 |
5 |
['github-actions', 'grunweg', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
45-54034 1 month ago |
45-54035 45 days ago |
1-38699 1 day |
| 39388 |
marcelolynch author:marcelolynch |
chore: remove @[expose] from def-free public sections |
Strip `@[expose]` from `public section` headers in 100 modules where no declaration needs its body visible downstream. A new sweep in the style of #38480
Found using the linter-in-progress: #39387
Relevant Zulip thread: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Removing.20unnecessary.20.60.40.5Bexpose.5D.60/with/595180230 |
merge-conflict |
100/100 |
Mathlib/Algebra/Category/Ring/Small.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Field/MinimalAxioms.lean,Mathlib/Algebra/Field/Opposite.lean,Mathlib/Algebra/Field/Rat.lean,Mathlib/Algebra/Field/ULift.lean,Mathlib/Algebra/Field/ZMod.lean,Mathlib/Algebra/Group/Action/Option.lean,Mathlib/Algebra/Group/Action/Sigma.lean,Mathlib/Algebra/Group/Action/Sum.lean,Mathlib/Algebra/Group/Action/Units.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/MulAction.lean,Mathlib/Algebra/Module/Projective.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/NonAssoc/LieAdmissible/Defs.lean,Mathlib/Algebra/Notation/Prod.lean,Mathlib/Algebra/Order/Floor/Div.lean,Mathlib/Algebra/Order/Group/Action/End.lean,Mathlib/Algebra/Order/Group/End.lean,Mathlib/Algebra/Order/Group/PosPart.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/Nonneg/Lattice.lean,Mathlib/Algebra/Order/Pi.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Ring/Commute.lean,Mathlib/AlgebraicTopology/ModelCategory/Over.lean,Mathlib/Analysis/InnerProductSpace/Coalgebra.lean,Mathlib/Analysis/Normed/Algebra/TrivSqZeroExt.lean,Mathlib/Analysis/Normed/Group/Constructions.lean,Mathlib/Analysis/Normed/Module/MStructure.lean,Mathlib/Analysis/Normed/Operator/Compact/FiniteDimension.lean,Mathlib/Analysis/ODE/DiscreteGronwall.lean,Mathlib/CategoryTheory/Localization/DerivabilityStructure/OfLocalizedEquivalences.lean,Mathlib/CategoryTheory/MarkovCategory/Positive.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Normal.lean,Mathlib/CategoryTheory/Monoidal/Functor/Types.lean,Mathlib/CategoryTheory/Monoidal/Types/Coyoneda.lean,Mathlib/CategoryTheory/Sites/CoversTop/Over.lean,Mathlib/Combinatorics/Additive/FreimanHom.lean,Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Data/ENNReal/Action.lean,Mathlib/Data/ENat/Pow.lean,Mathlib/Data/Finsupp/Pointwise.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/FunLike/Embedding.lean,Mathlib/Data/FunLike/Equiv.lean,Mathlib/Data/Int/Cast/Pi.lean,Mathlib/Data/List/Monad.lean,Mathlib/Data/NNRat/Lemmas.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Prod/Lex.lean,Mathlib/Data/Rat/Cast/Defs.lean,Mathlib/Data/Rat/Cast/OfScientific.lean,Mathlib/Data/Real/Archimedean.lean,Mathlib/Data/ZMod/IntUnitsPower.lean,Mathlib/GroupTheory/GroupAction/Embedding.lean,Mathlib/GroupTheory/IsPerfect.lean,Mathlib/GroupTheory/ResiduallyFinite.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Star.lean,Mathlib/LinearAlgebra/Projectivization/Action.lean,Mathlib/LinearAlgebra/RootSystem/GeckConstruction/Semisimple.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean,Mathlib/MeasureTheory/Measure/Sub.lean,Mathlib/MeasureTheory/Measure/Typeclasses/ZeroOne.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2/Transform.lean,Mathlib/NumberTheory/NumberField/ExistsRamified.lean,Mathlib/NumberTheory/Padics/PadicVal/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/Filter/FilterProduct.lean,Mathlib/Order/Heyting/Basic.lean,Mathlib/Order/Interval/Set/OrdConnected.lean,Mathlib/Order/Quotient.lean,Mathlib/Probability/Kernel/Deterministic.lean,Mathlib/RingTheory/Coalgebra/Convolution.lean,Mathlib/RingTheory/Flat/IsBaseChange.lean,Mathlib/RingTheory/HopfAlgebra/TensorProduct.lean,Mathlib/RingTheory/Ideal/GoingDown.lean,Mathlib/RingTheory/Ideal/GoingUp.lean,Mathlib/RingTheory/Ideal/Maximal.lean,Mathlib/RingTheory/Localization/Finiteness.lean,Mathlib/RingTheory/Noetherian/Defs.lean,Mathlib/RingTheory/QuasiFinite/Basic.lean,Mathlib/RingTheory/QuasiFinite/Polynomial.lean,Mathlib/RingTheory/QuasiFinite/Weakly.lean,Mathlib/RingTheory/Regular/ProjectiveDimension.lean,Mathlib/RingTheory/SimpleModule/Basic.lean,Mathlib/RingTheory/Smooth/Fiber.lean,Mathlib/RingTheory/TensorProduct/IsBaseChangeRightExact.lean,Mathlib/RingTheory/Unramified/LocalRing.lean,Mathlib/RingTheory/Valuation/Extension.lean,Mathlib/RingTheory/Valuation/IsTrivialOn.lean,Mathlib/SetTheory/Cardinal/Regular.lean,Mathlib/Tactic/Algebra/Lemmas.lean,Mathlib/Topology/Algebra/UniformMulAction.lean,Mathlib/Topology/CWComplex/Classical/Subcomplex.lean,Mathlib/Topology/EMetricSpace/Pi.lean,Mathlib/Topology/List.lean,Mathlib/Topology/MetricSpace/Pseudo/Pi.lean |
100 |
7 |
['eric-wieser', 'github-actions', 'grunweg', 'marcelolynch', 'mathlib-merge-conflicts', 'urkud'] |
nobody |
43-61738 1 month ago |
43-61739 43 days ago |
15-23632 15 days |
| 39489 |
Paul-Lez author:Paul-Lez |
fix: defeq abuse in HasFTaylorSeriesUpToOn.comp |
Removes a `set_option backward.isDefEq.respectTransparency false`. The fix isn't as nice as I would have hoped (I tried to make it smaller but to no avail).
---
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|
t-analysis
merge-conflict
|
5/2 |
Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean |
1 |
2 |
['github-actions', 'mathlib-merge-conflicts'] |
j-loreaux assignee:j-loreaux |
43-61604 1 month ago |
43-61604 43 days ago |
12-82083 12 days |
| 39395 |
marcelolynch author:marcelolynch |
chore(Tactic/Linter): reword PrivateLinter suggestion |
This matches the granular-by-default philosophy of the new module system and produces files without superfluous `@[expose] public`, which we also want to flag as undesirable: we steer to making every @[expose] is per-decl and intentional, rather than section-wide
Relevant Zulip thread: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Removing.20unnecessary.20.60.40.5Bexpose.5D.60/with/595180230 |
t-linter
merge-conflict
|
11/8 |
Mathlib/Tactic/Linter/PrivateModule.lean,MathlibTest/PrivateModuleLinter/hasOnlyPrivate.lean,MathlibTest/PrivateModuleLinter/notation3.lean,MathlibTest/PrivateModuleLinter/reservedName2.lean |
4 |
4 |
['JovanGerb', 'github-actions', 'grunweg', 'marcelolynch', 'mathlib-merge-conflicts'] |
JovanGerb assignee:JovanGerb |
43-11565 1 month ago |
47-52618 47 days ago |
11-19868 11 days |
| 26394 |
winstonyin author:winstonyin |
feat: existence of local flows on manifolds |
This PR continues the work from #21777.
Original PR: https://github.com/leanprover-community/mathlib4/pull/21777
Transfer the existence theorem of local flows on vector spaces to manifolds. The precise statement is:
> If a vector field `v` on a manifold `M` is continuously differentiable at an interior point `x₀`, then for a given `t₀` there exists a neighbourhood `u` of `x₀`, a positive `ε`, and `γ : M → ℝ → M` such that `γ x` is an integral curve of `v` on `(t₀ - ε, t₀ + ε)` for all `x ∈ u`.
This is powerful because all curves `γ x` (each with initial condition `x ∈ u`) share the same existence time interval `(t₀ - ε, t₀ + ε)`, rather than each curve having its own `ε`. This will allow us to show that $C^1$ vector fields on compact manifolds always have global integral curves / global flows.
Any suggestions to shorten the proof or split out useful lemmas are welcome!
- [x] depends on: #26392
---
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|
t-differential-geometry
merge-conflict
|
138/61 |
Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Order/Filter/Prod.lean |
3 |
13 |
['github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'ocfnash', 'winstonyin'] |
ocfnash assignee:ocfnash |
42-70462 1 month ago |
42-70463 42 days ago |
23-5862 23 days |
| 39205 |
ooovi author:ooovi |
feat(Geometry/Convex): Bundled convex set |
Add a bundled version of `IsConvexSet`.
---
Once the dependencies are merged, this PR only changes `Mathlib.Geometry.Convex.Set` and `Mathlib.Geometry.Convex.Hull`, at the bottom of the file, adding `ConvexSet` and everything in the corresponding namespace.
- [ ] depends on: #38934
- [ ] depends on: #38905
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|
large-import
merge-conflict
|
989/172 |
Mathlib.lean,Mathlib/Analysis/Convex/MetricSpace.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Geometry/Convex/ConvexSpace/AffineSpace.lean,Mathlib/Geometry/Convex/ConvexSpace/Defs.lean,Mathlib/Geometry/Convex/Hull.lean,Mathlib/Geometry/Convex/README.md,Mathlib/Geometry/Convex/Set.lean |
8 |
6 |
['github-actions', 'martinwintermath', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
38-7596 1 month ago |
unknown |
0-0 0 seconds |
| 38344 |
robo7179 author:robo7179 |
feat(SimpleGraph/Coloring/VertexColoring): Matching is 2 colorable |
---
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|
t-combinatorics
new-contributor
merge-conflict
|
51/0 |
Mathlib/Combinatorics/SimpleGraph/Coloring/VertexColoring.lean |
1 |
6 |
['SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'vlad902'] |
b-mehta assignee:b-mehta |
35-9437 1 month ago |
35-9438 35 days ago |
46-71620 46 days |
| 37707 |
MavenRain author:MavenRain |
feat(Combinatorics/SimpleGraph): add IsMaximalClique/IsMaximalIndepSet, refactor IsMaximum* to MaximalFor |
Addresses #34962
|
new-contributor
t-combinatorics
merge-conflict
|
63/31 |
Mathlib/Combinatorics/SimpleGraph/Clique.lean |
1 |
7 |
['MavenRain', 'SnirBroshi', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
30-76764 1 month ago |
30-76765 30 days ago |
26-52833 26 days |
| 39545 |
Hagb author:Hagb |
feat(Order/OrderIsoNat): some lemmas about `((· < ·) : ℕ → ℕ → Prop) ↪r r` |
This PR contains several lemmas about relation embedding from `<` in `Nat`, well order, and (in)finiteness.
- `RelEmbedding.infinite_iff_nonempty_relEmbedding_of_isWellOrder`: a type with a well order relation is infinite iff there is such a relation embedding.
- `RelEmbedding.finite_iff_empty_relEmbedding_of_isWellOrder`: a finite variant of `infinite_iff_nonempty_relEmbedding_of_isWellOrder`
- `IsWellOrder.finite_of_isWellOrder_of_isWellOrder_swap`: a type with a linear order relation well founded on both directions is finite.
- `instFiniteOfWellFoundedLTOfWellFoundedGT`: an instance variant of `IsWellOrder.finite_of_isWellOrder_of_isWellOrder_swap` on `WellFounded{LT,GT}`.
- `RelEmbedding.infinite_iff_nonempty_relEmbedding_lt_or_nonempty_relEmbedding_gt`: a type with a linear order relation is infinite iff there are both relation embedding between `<` in `Nat` and this relation, and between `>` in `Nat` and this relation.
- `RelEmbedding.finite_iff_isEmpty_relEmbedding_lt_and_isEmpty_relEmbedding_gt`: a finite variant of `infinite_iff_nonempty_relEmbedding_lt_or_nonempty_relEmbedding_gt`.
---
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<details>
<summary> Edit: remove the description on the original motivation since `WellQuasiOrdered` instead of theorems in this PR can be used for that goal. </summary>
`RelEmbedding.finite_iff_empty_relEmbedding_of_isWellOrder` might be used for proof of
```lean
example {α β γ} [LinearOrder α] [LinearOrder β] [WellFoundedLT α] [WellFoundedLT β] [LinearOrder γ]
{f : α × β ≃ γ} (mono : Monotone f) : WellFoundedLT γ := sorry
```
The latter will be used for
```lean
example {α β γ} [Finite α] [LinearOrder β] [WellFoundedLT β] [LinearOrder γ]
{f : (α → β) ≃ γ} (mono : Monotone f) : WellFoundedLT γ := sorry
```
And the finial goal is the well-foundedness of monomial order when the index type `σ` is finite (under the definition in #39214). |
t-order
merge-conflict
|
58/0 |
Mathlib/Order/OrderIsoNat.lean |
1 |
16 |
['Hagb', 'SnirBroshi', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts', 'vihdzp'] |
nobody |
30-73834 1 month ago |
30-73835 30 days ago |
23-50475 23 days |
| 39769 |
chenson2018 author:chenson2018 |
chore(Topology): 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-topology
tech debt
merge-conflict
|
35/17 |
Mathlib/Topology/Compactness/CountablyCompact.lean,Mathlib/Topology/EMetricSpace/BoundedVariation.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean,Mathlib/Topology/Order/Basic.lean,Mathlib/Topology/Order/IsLUB.lean,Mathlib/Topology/Order/WithTop.lean,Mathlib/Topology/Path.lean,Mathlib/Topology/Sets/VietorisTopology.lean,Mathlib/Topology/Sheaves/Flasque.lean |
9 |
2 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
30-73709 1 month ago |
30-73709 30 days ago |
18-36384 18 days |
| 40428 |
eric-wieser author:eric-wieser |
chore: remove a duplicate instance |
We already build this instance in the general case, I don't think we need to build it again.
We keep the shortcut since we already have other shortcuts of this style.
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t-algebra
large-import
merge-conflict
label:t-algebra$ |
2/3 |
Mathlib/Algebra/Field/Subfield/Basic.lean |
1 |
4 |
['eric-wieser', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] |
nobody |
29-67127 29 days ago |
29-67128 29 days ago |
3-19832 3 days |
| 38823 |
matthewjasper author:matthewjasper |
chore(LinearAlgebra/TensorProduct): fix diamond in `AddCommGroup` instance |
The `SMul` instance for tensor products directly used `AddCon.lift`, so wasn't type correct at instance transparency. This caused a diamond with the `AddCommGroup` instance on tensor products because after unfolding some types didn't match, so I've wrapped the sMul function in a semireducible def to prevent this.
---
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t-algebra
merge-conflict
label:t-algebra$ |
30/23 |
Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Defs.lean |
2 |
7 |
['dagurtomas', 'github-actions', 'kbuzzard', 'leanprover-radar', 'mathlib-merge-conflicts'] |
nobody |
24-67886 24 days ago |
29-69579 29 days ago |
42-6323 42 days |
| 37073 |
kim-em author:kim-em |
feat: add wrap_instance% using core's wrapInstance |
This PR adds a new `wrap_instance%` term elaborator that delegates to Lean core's
`wrapInstance` (from https://github.com/leanprover/lean4/pull/12897), and replaces ~53
`fast_instance%` call sites where the replacement is safe.
`wrap_instance%` is a thin wrapper (~15 lines) around `Lean.Meta.wrapInstance`. Like
`fast_instance%`, it reduces instances to constructor applications and reuses canonical
sub-instances. Unlike `fast_instance%`, it works at `instances` transparency and delegates all
normalization logic to core.
The replaced sites cover:
- Equiv/type-alias transfers (WithAbs, WithConv, WithVal, WithLp, TransferInstance)
- Surjective constructors (Con, RingCon quotients, module congruences)
- DFunLike leaf instances (MultilinearMap, ContinuousMultilinearMap, AlternatingMap, Intertwining)
- Quotient instances (LinearAlgebra/Quotient/Defs)
- inferInstanceAs% sites (StandardPart, Presentation/Core)
- Miscellaneous (InfiniteAdeleRing, ZMod)
This PR *doesn't* attempt to replace all `fast_instance%`; it gets more complicated!
🤖 Prepared with Claude Code |
merge-conflict |
88/59 |
Mathlib/Algebra/Algebra/TransferInstance.lean,Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/Algebra/WithConv.lean,Mathlib/Analysis/Normed/Lp/WithLp.lean,Mathlib/Analysis/Normed/Ring/WithAbs.lean,Mathlib/Data/ZMod/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/LinearAlgebra/Alternating/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Quotient/Defs.lean,Mathlib/RepresentationTheory/Intertwining.lean,Mathlib/RingTheory/Extension/Presentation/Core.lean,Mathlib/Tactic/FastInstance.lean,Mathlib/Topology/Algebra/Module/Alternating/Basic.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean |
16 |
13 |
['JovanGerb', 'github-actions', 'kim-em', 'leanprover-radar', 'mathlib-merge-conflicts'] |
nobody |
24-61893 24 days ago |
24-61894 24 days ago |
51-13334 51 days |
| 34855 |
staroperator author:staroperator |
feat(Order): use `to_dual` for `PFilter` |
This PR redefines `PFilter` to get rid of `OrderDual` and uses `to_dual` to translate theorems. The whole file of `PFilter` is now deprecated.
Some changes:
- To align with `Filter`, the order on `PFilter` is changed to the reversed set inclusion. Ultrafilters, the dual notion of maximal ideals, become minimal in this order.
- `to_dual` does not work on `sequenceOfCofinals`. I left `Order.Cofinal` and the Rasiowa–Sikorski lemma not `to_dual`-ized, and we should move them to a separate file later.
- `IsLEChain` is added to tag `to_dual`.
- `IsCoatom.isProper`/`IsCoatom.isMaximal` is deprecated by `Order.Ideal.isProper_of_isCoatom`/`Order.Ideal.isMaximal_of_isProper`, since this result is special to ideals while `IsCoatom` namespace should be for orders in general.
---
- [x] depends on: #34820
---
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t-order
merge-conflict
|
292/242 |
Mathlib/Order/Atoms.lean,Mathlib/Order/BooleanAlgebra/Basic.lean,Mathlib/Order/BooleanAlgebra/Defs.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/Ideal.lean,Mathlib/Order/PFilter.lean,Mathlib/Order/Preorder/Chain.lean,Mathlib/Order/PrimeIdeal.lean,Mathlib/Order/PrimeSeparator.lean,Mathlib/Order/ZornAtoms.lean,Mathlib/RingTheory/IdealFilter/Basic.lean,Mathlib/RingTheory/IdealFilter/Topology.lean,Mathlib/Tactic/Translate/ToDual.lean |
13 |
6 |
['JovanGerb', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
21-3102 21 days ago |
33-71177 33 days ago |
38-31545 38 days |
| 39371 |
fpvandoorn author:fpvandoorn |
feat: tag lemmas with compactness and closedness |
---
- [ ] depends on: #39370
[](https://gitpod.io/from-referrer/)
|
merge-conflict |
190/11 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/GrindAttrs.lean,Mathlib/Topology/Basic.lean,Mathlib/Topology/Closure.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/MetricSpace/ProperSpace.lean,Mathlib/Topology/Order/Compact.lean,Mathlib/Topology/Order/OrderClosed.lean,Mathlib/Topology/Separation/Basic.lean,Mathlib/Topology/Separation/Hausdorff.lean,MathlibTest/Compactness.lean |
13 |
3 |
['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
20-28937 20 days ago |
59-10416 59 days ago |
0-1 1 second |
| 38968 |
eric-wieser author:eric-wieser |
fix: improve defeqs of comp actions |
The (deliberately) non-reducible `SMul.comp.smul` definition caused us to end with these failing unification examples at instance reducibility:
```lean
example : (Module.compHom ℕ (RingHom.id ℕ)).toSMul = SMul.comp ℕ (RingHom.id ℕ) := by
with_reducible_and_instances rfl
example : (Module.compHom ℕ (RingHom.id ℕ)).toMulAction = MulAction.compHom ℕ (MonoidHom.id ℕ) := by
with_reducible_and_instances rfl
```
There are two issues this fixes:
* the `compHom` constructors are inconsistent on whether they use `SMul.comp.smul` or reimplement its contents
* we need `SMul.comp.smul` to be instance-reducible, so that when invoked with the identity function it is instance-defeq to the original action.
As a bonus, allowing these to unify means we can have a single `SMul.comp_smul_def` lemma that works for all of the `compHom` definitions.
We could also consider changing `compHom` to take a `HomClass` in order to remove the casts entirely, which would remove the need to add these `SMul.comp` terms. This PR leaves that for possible future work, noting that in the past we have moved away from writing `def`s taking `HomClass`es.
Co-authored-by: Junye Ji <jijunye1@outlook.com>
---
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Refined from #38777 |
t-algebra
merge-conflict
label:t-algebra$ |
46/26 |
Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/Hom.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/End.lean,Mathlib/Algebra/Module/RingHom.lean,Mathlib/Analysis/Complex/UpperHalfPlane/MoebiusAction.lean,Mathlib/Analysis/Complex/UpperHalfPlane/ProperAction.lean,Mathlib/Topology/Algebra/Group/OpenMapping.lean |
9 |
13 |
['JJYYY-JJY', 'Vierkantor', 'eric-wieser', 'github-actions', 'leanprover-radar', 'mathlib-bors', 'mathlib-merge-conflicts'] |
nobody |
19-66079 19 days ago |
19-66080 19 days ago |
13-10860 13 days |
| 26911 |
JovanGerb author:JovanGerb |
chore: fix naming of `mono` and `monotone` |
The naming convention says:
"We use `_mono` for `a ≤ b → f a ≤ f b` and `_anti` for `a ≤ b → f b ≤ f a`, so we also use `_monotone` for `Monotone f`, `_antitone` for `Antitone f`, `_strictMono` for `StrictMono f`, `_strictAnti` for `StrictAnti f`, etc..."
This PR swaps `mono`/`anti` and `monotone`/`antitone` where required so that `monotone` refers to `Monotone`, while `mono` refers to a lemma that might be tagged with `@[gcongr]`
This PR does not address
- `monotone_right`/`mono_right` vs `right_monotone`/`right_mono`
- `monotone_arcsin` vs `arcsin_monotone`
edit: TODO: `ideal_mono` and friends
---
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merge-conflict |
235/169 |
Archive/Imo/Imo1962Q1.lean,Archive/Wiedijk100Theorems/AbelRuffini.lean,Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Counterexamples/DiscreteTopologyNonDiscreteUniformity.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Group/Basic.lean,Mathlib/Algebra/Order/Group/Finset.lean,Mathlib/Algebra/Order/Group/PosPart.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Pow.lean,Mathlib/Algebra/Order/ToIntervalMod.lean,Mathlib/Algebra/Polynomial/Degree/CardPowDegree.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Convex/Deriv.lean,Mathlib/Analysis/Normed/Order/UpperLower.lean,Mathlib/Analysis/Normed/Unbundled/SeminormFromConst.lean,Mathlib/Analysis/PSeries.lean,Mathlib/Analysis/Real/Pi/Bounds.lean,Mathlib/Analysis/SpecialFunctions/Pow/Continuity.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Analysis/SpecificLimits/Basic.lean,Mathlib/Analysis/SpecificLimits/FloorPow.lean,Mathlib/Combinatorics/SetFamily/Kleitman.lean,Mathlib/Combinatorics/SimpleGraph/Girth.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Lemma.lean,Mathlib/Data/ENNReal/Inv.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/ENat/Pow.lean,Mathlib/Data/Nat/Choose/Factorization.lean,Mathlib/Dynamics/Circle/RotationNumber/TranslationNumber.lean,Mathlib/LinearAlgebra/AffineSpace/AffineMap.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Basic.lean,Mathlib/MeasureTheory/Constructions/Polish/Basic.lean,Mathlib/MeasureTheory/MeasurableSpace/MeasurablyGenerated.lean,Mathlib/MeasureTheory/OuterMeasure/Operations.lean,Mathlib/NumberTheory/Bertrand.lean,Mathlib/NumberTheory/FermatPsp.lean,Mathlib/NumberTheory/Height/Basic.lean,Mathlib/NumberTheory/ModularForms/Bounds.lean,Mathlib/NumberTheory/Padics/Hensel.lean,Mathlib/NumberTheory/Padics/WithVal.lean,Mathlib/Order/Concept.lean,Mathlib/Order/Filter/AtTopBot/Archimedean.lean,Mathlib/Order/Filter/AtTopBot/Defs.lean,Mathlib/Order/Fin/Basic.lean,Mathlib/Order/Heyting/Basic.lean,Mathlib/Order/Heyting/Boundary.lean,Mathlib/Order/Heyting/Regular.lean,Mathlib/Order/Hom/Set.lean,Mathlib/Order/Interval/Set/Fin.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Order/UpperLower/Closure.lean,Mathlib/Probability/StrongLaw.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Basic.lean,Mathlib/RingTheory/FractionalIdeal/Basic.lean,Mathlib/RingTheory/WittVector/Basic.lean,Mathlib/Topology/EMetricSpace/Lipschitz.lean,Mathlib/Topology/MetricSpace/Antilipschitz.lean |
63 |
15 |
['JovanGerb', 'bryangingechen', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib-bors', 'mathlib-merge-conflicts', 'wrenna-robson'] |
bryangingechen assignee:bryangingechen |
18-48573 18 days ago |
366-14816 366 days ago |
2-53782 2 days |
| 34932 |
erdOne author:erdOne |
feat(AlgebraicGeometry): formally etale morphisms |
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t-algebraic-geometry
merge-conflict
|
163/12 |
Mathlib.lean,Mathlib/AlgebraicGeometry/Morphisms/Etale.lean,Mathlib/AlgebraicGeometry/Morphisms/FormallyEtale.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/RingTheory/RingHom/Etale.lean |
5 |
21 |
['chrisflav', 'erdOne', 'github-actions', 'joneugster', 'mathlib-bors', 'mathlib-merge-conflicts', 'ocfnash'] |
nobody |
18-48572 18 days ago |
137-70059 137 days ago |
11-35673 11 days |
| 27180 |
ADedecker author:ADedecker |
feat: quotient of a monoid with zero by a multiplicative congruence |
---
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My motivation is getting a more conceptual construction of [ValuativeRel.ValueGroupWithZero](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/Valuation/ValuativeRel.html#ValuativeRel.ValueGroupWithZero), but I think this is of independent interest.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
label:t-algebra$ |
141/26 |
Mathlib.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/GroupWithZero.lean |
5 |
38 |
['ADedecker', 'eric-wieser', 'github-actions', 'mathlib-bors', 'mathlib4-merge-conflict-bot', 'ocfnash'] |
ocfnash assignee:ocfnash |
18-48569 18 days ago |
333-33469 333 days ago |
28-12053 28 days |
| 31607 |
grunweg author:grunweg |
chore: rename `continuous{,On,At,Within}_const` to `ContinuousFoo.const` |
Zulip discussion: [#mathlib4 > Naming convention @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Naming.20convention/near/447491526)
---
- [x] depends on: #34441
- [x] depends on: #34688
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|
merge-conflict |
412/378 |
Archive/Hairer.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Analysis/BoxIntegral/UnitPartition.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Continuity.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/BumpFunction/InnerProduct.lean,Mathlib/Analysis/Calculus/DSlope.lean,Mathlib/Analysis/Calculus/Deriv/MeanValue.lean,Mathlib/Analysis/Calculus/DiffContOnCl.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/MeanValue.lean,Mathlib/Analysis/Calculus/Rademacher.lean,Mathlib/Analysis/Calculus/Taylor.lean,Mathlib/Analysis/Complex/AbelLimit.lean,Mathlib/Analysis/Complex/AbsMax.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Complex/CauchyIntegral.lean,Mathlib/Analysis/Complex/HalfPlane.lean,Mathlib/Analysis/Complex/LocallyUniformLimit.lean,Mathlib/Analysis/Complex/PhragmenLindelof.lean,Mathlib/Analysis/Complex/RemovableSingularity.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Measure.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Metric.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Topology.lean,Mathlib/Analysis/Convex/Cone/InnerDual.lean,Mathlib/Analysis/Convex/Exposed.lean,Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Convex/PartitionOfUnity.lean,Mathlib/Analysis/Convex/Side.lean,Mathlib/Analysis/Convex/StdSimplex.lean,Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/InnerProductSpace/Continuous.lean,Mathlib/Analysis/InnerProductSpace/Harmonic/HarmonicContOnCl.lean,Mathlib/Analysis/InnerProductSpace/LinearPMap.lean,Mathlib/Analysis/InnerProductSpace/MeanErgodic.lean,Mathlib/Analysis/InnerProductSpace/OfNorm.lean,Mathlib/Analysis/LocallyConvex/Separation.lean,Mathlib/Analysis/Meromorphic/Order.lean,Mathlib/Analysis/Meromorphic/TrailingCoefficient.lean,Mathlib/Analysis/Normed/Affine/AddTorsor.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/Normed/Group/Lemmas.lean,Mathlib/Analysis/Normed/Module/Ball/Homeomorph.lean,Mathlib/Analysis/Normed/Module/Connected.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/Normed/Module/Multilinear/Basic.lean,Mathlib/Analysis/Normed/Operator/Completeness.lean,Mathlib/Analysis/ODE/Gronwall.lean,Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Isometric.lean,Mathlib/Analysis/SpecialFunctions/Elliptic/Weierstrass.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Basic.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Deligne.lean,Mathlib/Analysis/SpecialFunctions/Gaussian/GaussianIntegral.lean,Mathlib/Analysis/SpecialFunctions/Gaussian/PoissonSummation.lean,Mathlib/Analysis/SpecialFunctions/Integrability/Basic.lean,Mathlib/Analysis/SpecialFunctions/Integrals/Basic.lean,Mathlib/Analysis/SpecialFunctions/MulExpNegMulSq.lean,Mathlib/Analysis/SpecialFunctions/PolarCoord.lean,Mathlib/Analysis/SpecialFunctions/Pow/Continuity.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Inverse.lean,Mathlib/Computability/AkraBazzi/SumTransform.lean,Mathlib/Condensed/Light/TopCatAdjunction.lean,Mathlib/Condensed/TopCatAdjunction.lean,Mathlib/Dynamics/OmegaLimit.lean,Mathlib/Geometry/Euclidean/Angle/Oriented/Basic.lean,Mathlib/Geometry/Manifold/Bordism.lean,Mathlib/Geometry/Manifold/Complex.lean,Mathlib/Geometry/Manifold/Instances/Icc.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Geometry/Manifold/SmoothApprox.lean,Mathlib/MeasureTheory/Function/SpecialFunctions/Basic.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Integral/CircleIntegral.lean,Mathlib/MeasureTheory/Integral/CircleTransform.lean,Mathlib/MeasureTheory/Integral/DominatedConvergence.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean,Mathlib/MeasureTheory/Integral/RieszMarkovKakutani/Real.lean,Mathlib/MeasureTheory/Measure/LevyProkhorovMetric.lean,Mathlib/MeasureTheory/Measure/Stieltjes.lean,Mathlib/NumberTheory/Cyclotomic/CyclotomicCharacter.lean,Mathlib/NumberTheory/Harmonic/ZetaAsymp.lean,Mathlib/NumberTheory/LSeries/AbstractFuncEq.lean,Mathlib/NumberTheory/LSeries/Deriv.lean,Mathlib/NumberTheory/LSeries/Dirichlet.lean,Mathlib/NumberTheory/LSeries/DirichletContinuation.lean,Mathlib/NumberTheory/LSeries/HurwitzZetaOdd.lean,Mathlib/NumberTheory/LSeries/PrimesInAP.lean |
185 |
19 |
['github-actions', 'j-loreaux', 'mathlib-bors', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
18-48567 18 days ago |
240-71701 240 days ago |
0-1 1 second |
| 37819 |
YellPika author:YellPika |
feat(Order/OmegaCompletePartialOrder): add `OmegaCompletePartialOrder` instance for `WithBot` with basic `ωScottContinuous` lemmas |
This is a modification of #34093. See #34093 for details.
---
- [x] depends on: #33941
- [x] depends on: #37258
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new-contributor
t-order
merge-conflict
|
337/10 |
Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Order/Monotone/Basic.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,Mathlib/Order/TypeTags.lean,Mathlib/Order/WithBot.lean |
6 |
6 |
['Komyyy', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
14-22444 14 days ago |
72-49331 72 days ago |
22-11204 22 days |
| 40368 |
Sanghyeok0 author:Sanghyeok0 |
feat: add confluence predicates for relations |
This PR adds relation-level predicates for confluence-style properties:
* `Relation.Diamond`
* `Relation.Confluent`
* `Relation.ChurchRosser`
* `Relation.StronglyConfluent`
It also adds basic API connecting these predicates:
* `Relation.ReflTransGen.to_eqvGen`
* `Relation.Join.to_eqvGen`
* `Relation.StronglyConfluent.confluent`
* `Relation.ChurchRosser.confluent`
* `Relation.Confluent.churchRosser`
* `Relation.StronglyConfluent.churchRosser`
* `Relation.confluent_iff_churchRosser`
The terminology follows standard usage in abstract rewriting systems, including the diamond property, confluence, the Church-Rosser property, and strong confluence.
The existing theorem `Relation.church_rosser` is kept unchanged. In terms of the new predicates, its hypothesis is `Relation.StronglyConfluent r`, and its conclusion is `Relation.Confluent r`. This PR therefore adds `Relation.StronglyConfluent.confluent` as the corresponding named API while preserving the existing declaration.
References: the Wikipedia pages on abstract rewriting systems and confluence, and *Gröbner Bases: A Computational Approach to Commutative Algebra*.
---
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t-logic
new-contributor
merge-conflict
|
92/3 |
Mathlib/Logic/Relation.lean |
1 |
8 |
['Sanghyeok0', 'chenson2018', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
10-71286 10 days ago |
10-71287 10 days ago |
23-11791 23 days |
| 40369 |
plp127 author:plp127 |
refactor: make `IsAtom` not depend on `OrderBot` |
We choose for `IsAtom a` to mean `∃ b, b ⋖ a ∧ ∀ c, c < a → b ≤ c`, which is equivalent to the current definition in the case of a `PartialOrder` with `OrderBot`. See [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.60IsAtom.60.20is.20wrong.20for.20preorders/near/601014129).
---
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t-order
merge-conflict
|
370/300 |
Mathlib/Algebra/Group/Subgroup/Order.lean,Mathlib/Algebra/Lie/InvariantForm.lean,Mathlib/Algebra/Lie/Killing.lean,Mathlib/Algebra/Lie/Semisimple/Basic.lean,Mathlib/Data/Finset/Grade.lean,Mathlib/GroupTheory/GroupAction/Jordan.lean,Mathlib/GroupTheory/Perm/MaximalSubgroups.lean,Mathlib/GroupTheory/SpecificGroups/Alternating/MaximalSubgroups.lean,Mathlib/GroupTheory/Sylow.lean,Mathlib/LinearAlgebra/Basis/VectorSpace.lean,Mathlib/LinearAlgebra/FiniteDimensional/Basic.lean,Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/Order/Atoms.lean,Mathlib/Order/BooleanGenerators.lean,Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/Order/Filter/Ultrafilter/Defs.lean,Mathlib/Order/Ideal.lean,Mathlib/Order/Partition/Finpartition.lean,Mathlib/Order/Radical.lean,Mathlib/Order/SuccPred/Tree.lean,Mathlib/Order/ZornAtoms.lean,Mathlib/RingTheory/ChainOfDivisors.lean,Mathlib/RingTheory/DedekindDomain/Dvr.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Basic.lean,Mathlib/RingTheory/DualNumber.lean,Mathlib/RingTheory/Ideal/Basic.lean,Mathlib/RingTheory/Ideal/GoingUp.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Maximal.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/Jacobson/Radical.lean,Mathlib/RingTheory/Jacobson/Ring.lean,Mathlib/RingTheory/KrullDimension/Zero.lean,Mathlib/RingTheory/LocalRing/Basic.lean,Mathlib/RingTheory/LocalRing/MaximalIdeal/Basic.lean,Mathlib/RingTheory/PrincipalIdealDomain.lean,Mathlib/RingTheory/SimpleModule/Isotypic.lean,Mathlib/RingTheory/Spectrum/Prime/Basic.lean,Mathlib/Topology/Sets/Closeds.lean |
40 |
3 |
['github-actions', 'mathlib-merge-conflicts', 'plp127'] |
nobody |
10-71285 10 days ago |
10-71286 10 days ago |
22-11352 22 days |
| 37716 |
slavanaprienko author:slavanaprienko |
feat(LinearAlgebra/Matrix/Determinant): Desnanot-Jacobi identity |
This PR adds the Desnanot-Jacobi identity (also known as the Lewis Carroll identity or Dodgson condensation): for any (n+2)×(n+2) matrix M over a commutative ring,
$$\det(M) \cdot \det(M_{1,n}^{1,n}) = \det(M_1^1) \cdot \det(M_n^n) - \det(M_1^n) \cdot \det(M_n^1)$$
The proof follows Bressoud's *Proofs and Confirmations* (Cambridge University Press, 1999): multiply M by an auxiliary matrix built from columns of the adjugate, then compare determinants. This yields the identity premultiplied by det(M). To cancel, we pass to a universal polynomial ring (an integral domain with nonzero determinant), then specialize back to arbitrary commutative rings.
It seems there's some interest in adding this:
https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Determinantal.20identity.20and.20the.20Cauchy.20matrix.20determinant/with/582946873
--- |
t-algebra
new-contributor
merge-conflict
label:t-algebra$ |
217/0 |
Mathlib.lean,Mathlib/LinearAlgebra/Matrix/Determinant/DesnanotJacobi.lean |
2 |
14 |
['SnirBroshi', 'github-actions', 'grunweg', 'kim-em', 'mathlib-merge-conflicts', 'slavanaprienko'] |
ocfnash assignee:ocfnash |
9-69335 9 days ago |
9-69336 9 days ago |
53-49476 53 days |
| 39847 |
vihdzp author:vihdzp |
chore: redefine `Ordinal.preOmega` using `Order.enum` |
The plan is to deprecate `Ordinal.enumOrd` in favor of `Order.enum`.
---
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- [ ] depends on: #39136
[](https://gitpod.io/from-referrer/)
|
t-set-theory
merge-conflict
|
104/28 |
Mathlib/Order/Cofinal.lean,Mathlib/SetTheory/Cardinal/Aleph.lean,Mathlib/SetTheory/Cardinal/Cofinality/Club.lean,Mathlib/SetTheory/Cardinal/Cofinality/Enum.lean |
4 |
3 |
['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
9-35867 9 days ago |
9-35868 9 days ago |
0-28694 7 hours |
| 38228 |
kim-em author:kim-em |
ci: block merging PRs that increase technical debt unless reviewed |
This PR adds a merge gate for technical debt increases.
When the existing technical debt metrics script reports an increase, the `build` job adds an `increases-technical-debt` label. A `check-technical-debt` job then adds `blocked-by-increases-technical-debt`, which blocks bors.
A reviewer can add `allow-increases-technical-debt` to unblock after confirming the increase is acceptable.
### Fail-closed detection
The detection greps for the *safe* patterns (`Decrease in tech debt:` / `No changes to technical debt.`) rather than for `Increase`. If `mathlib-ci` changes the script's output wording, the label is added (fail closed) rather than silently skipped (fail open).
### Labels (three-label pattern, same as #38225)
| Label | Managed by | Purpose |
|---|---|---|
| `increases-technical-debt` | `build` job (tech debt script) | Factual: this PR increases debt |
| `blocked-by-increases-technical-debt` | `check-technical-debt` job | Operational: blocks bors |
| `allow-increases-technical-debt` | Reviewer | Override: reviewer approves the increase |
Bors's `block_labels` has no conditional logic, so we need the derived `blocked-by-increases-technical-debt` label to express the conjunction "increases-technical-debt AND NOT allow-increases-technical-debt".
False positives can be reported on the [mathlib4 Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/increases-technical-debt.20label).
🤖 Prepared with Claude Code
-----------
- [x] depends on: leanprover-community/mathlib-ci#28 |
CI
merge-conflict
|
83/2 |
.github/workflows/PR_summary.yml,bors.toml |
2 |
10 |
['github-actions', 'grunweg', 'jcommelin', 'joneugster', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
bryangingechen assignee:bryangingechen |
8-80718 8 days ago |
8-80719 8 days ago |
49-25630 49 days |
| 39638 |
mcdoll author:mcdoll |
feat(Algebra): use `Is*Apply` for `LinearMap` |
Some of the instances can't be simplified to use `FunLike.module` etc because of the `assert_not_exists Pi.module` in `Algebra/Module/LinearMap/Defs.lean` and the principled solution would be to move out the instances to the `Basic` file, but that makes the already large diff even worse and will be done in a second PR.
Using `IsAddApply` means that even though `add_apply` is proved by `rfl` it is not used by `dsimp`, therefore a lot of theorems that used `dsimp` had to be changed.
---
There are a couple of proofs in the (co-)homology files that get worse and I honestly don't understand what is going on there - my feeling is that the reason is something else and not the refactor, but I don't know this part of mathlib at all.
<!-- Your PR title will become the first line of the commit message.
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t-algebra
large-import
merge-conflict
label:t-algebra$ |
424/429 |
Archive/Sensitivity.lean,Mathlib/Algebra/Azumaya/Matrix.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Differentials/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/Central/End.lean,Mathlib/Algebra/Group/ForwardDiff.lean,Mathlib/Algebra/Lie/Abelian.lean,Mathlib/Algebra/Lie/AdjointAction/Derivation.lean,Mathlib/Algebra/Lie/BaseChange.lean,Mathlib/Algebra/Lie/Basis.lean,Mathlib/Algebra/Lie/CartanExists.lean,Mathlib/Algebra/Lie/Cochain.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Lie/EngelSubalgebra.lean,Mathlib/Algebra/Lie/Extension.lean,Mathlib/Algebra/Lie/InvariantForm.lean,Mathlib/Algebra/Lie/LieTheorem.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Lie/TensorProduct.lean,Mathlib/Algebra/Lie/TraceForm.lean,Mathlib/Algebra/Lie/Weights/Basic.lean,Mathlib/Algebra/Lie/Weights/Cartan.lean,Mathlib/Algebra/Lie/Weights/IsSimple.lean,Mathlib/Algebra/Lie/Weights/Killing.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/Algebra/Module/LinearMap/Basic.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/Module/LinearMap/Polynomial.lean,Mathlib/Algebra/Module/Presentation/Basic.lean,Mathlib/Algebra/Module/Submodule/Bilinear.lean,Mathlib/Algebra/Module/Submodule/LinearMap.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/Polynomial/HasseDeriv.lean,Mathlib/Algebra/TrivSqZeroExt/Basic.lean,Mathlib/Analysis/Calculus/LagrangeMultipliers.lean,Mathlib/Analysis/Complex/Conformal.lean,Mathlib/Analysis/Fourier/BoundedContinuousFunctionChar.lean,Mathlib/Analysis/Fourier/FourierTransform.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/ConformalLinearMap.lean,Mathlib/Analysis/InnerProductSpace/LinearMap.lean,Mathlib/Analysis/InnerProductSpace/LinearPMap.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/Projection/FiniteDimensional.lean,Mathlib/Analysis/InnerProductSpace/Projection/Reflection.lean,Mathlib/Analysis/InnerProductSpace/Spectrum.lean,Mathlib/Analysis/InnerProductSpace/TensorProduct.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/Normed/Operator/Bilinear.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/FieldTheory/JacobsonNoether.lean,Mathlib/FieldTheory/NormalizedTrace.lean,Mathlib/Geometry/Euclidean/Angle/Oriented/Affine.lean,Mathlib/Geometry/Euclidean/Angle/Oriented/Rotation.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Affine.lean,Mathlib/LinearAlgebra/AffineSpace/AffineMap.lean,Mathlib/LinearAlgebra/AffineSpace/Basis.lean,Mathlib/LinearAlgebra/AffineSpace/Combination.lean,Mathlib/LinearAlgebra/Alternating/Basic.lean,Mathlib/LinearAlgebra/Basis/Defs.lean,Mathlib/LinearAlgebra/Basis/SMul.lean,Mathlib/LinearAlgebra/BilinearForm/DualLattice.lean,Mathlib/LinearAlgebra/BilinearForm/Hom.lean,Mathlib/LinearAlgebra/BilinearForm/Orthogonal.lean,Mathlib/LinearAlgebra/BilinearForm/Properties.lean,Mathlib/LinearAlgebra/Center.lean,Mathlib/LinearAlgebra/Charpoly/Basic.lean,Mathlib/LinearAlgebra/CliffordAlgebra/BaseChange.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Contraction.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Equivs.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Even.lean,Mathlib/LinearAlgebra/CliffordAlgebra/EvenEquiv.lean,Mathlib/LinearAlgebra/Contraction.lean,Mathlib/LinearAlgebra/CrossProduct.lean,Mathlib/LinearAlgebra/Determinant.lean,Mathlib/LinearAlgebra/Dimension/Free.lean,Mathlib/LinearAlgebra/Dual/Basis.lean,Mathlib/LinearAlgebra/Dual/Defs.lean,Mathlib/LinearAlgebra/Dual/Lemmas.lean,Mathlib/LinearAlgebra/Eigenspace/Basic.lean,Mathlib/LinearAlgebra/Eigenspace/Triangularizable.lean,Mathlib/LinearAlgebra/Eigenspace/Zero.lean,Mathlib/LinearAlgebra/ExteriorAlgebra/OfAlternating.lean,Mathlib/LinearAlgebra/Finsupp/LSum.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/Matrix/Ideal.lean,Mathlib/LinearAlgebra/Matrix/Kronecker.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/Matrix/ToLin.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Pi.lean |
163 |
31 |
['Vierkantor', 'github-actions', 'grunweg', 'mathlib-merge-conflicts', 'mcdoll'] |
nobody |
8-11976 8 days ago |
8-11976 8 days ago |
10-54344 10 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
merge-conflict
|
319/152 |
Mathlib/Algebra/FreeAlgebra/Cardinality.lean,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 |
25 |
3 |
['acmepjz', 'github-actions', 'mathlib-merge-conflicts'] |
alreadydone assignee:alreadydone |
8-11975 8 days ago |
8-11975 8 days ago |
39-75155 39 days |
| 40626 |
chenson2018 author:chenson2018 |
feat(Logic/Relation): some `EqvGen` API |
This is adapted from #40606 and existing lemmas in CSLib. I move two theorems (`Equivalence.eqvGen_iff` and `Equivalence.eqvGen_eq`) earlier for a better proof of `EqvGen.lift'` that matches what is done for other closures.
Co-authored-by: Dagur Asgeirsson <dagurtomas@gmail.com>
---
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|
t-logic
merge-conflict
|
77/14 |
Mathlib/Logic/Relation.lean |
1 |
6 |
['chenson2018', 'github-actions', 'mathlib-merge-conflicts', 'plp127'] |
nobody |
5-79865 5 days ago |
5-79866 5 days ago |
19-39562 19 days |
| 34164 |
Scarlett-le author:Scarlett-le |
feat(Geometry/Euclidean/Sphere): define arcs on spheres |
This PR defines arcs on spheres and proves basic properties.
## Main definitions
* `EuclideanGeometry.Sphere.Arc`: An arc on a sphere, defined by a left
endpoint and a midpoint on the sphere. The right endpoint is computed as
the reflection of left across the line through the center and mid.
* `Arc.opposite`: The opposite arc (same endpoints, antipodal mid).
* `Arc.oppositeEquiv`: The involution given by `opposite`.
* `Arc.minor` / `Arc.major`: The minor/major arc between two
non-diametrically-opposite points.
* `Arc.through`: The arc from `A` to `C` passing through `B`.
* `Arc.avoiding`: The arc from `A` to `C` not passing through `B`.
## Main results
* `through_right` / `avoiding_right`: The right endpoint equals `C`.
* `mem_interior_through` / `mem_through`: `B` lies in the `through` arc.
* `not_mem_avoiding`: `B` does not lie in the `avoiding` arc (when `A ≠ C`).
## Dependencies
- [x] depends on: #36241
- [x] depends on: #35956
- [x] depends on: #35957
- [x] depends on: #40245 |
t-euclidean-geometry
merge-conflict
|
982/0 |
Mathlib.lean,Mathlib/Analysis/Convex/Side.lean,Mathlib/Analysis/InnerProductSpace/Projection/FiniteDimensional.lean,Mathlib/Geometry/Euclidean/Sphere/Arc.lean,Mathlib/Geometry/Euclidean/Sphere/OrthRadius.lean,Mathlib/LinearAlgebra/Ray.lean |
6 |
16 |
['Scarlett-le', 'github-actions', 'jsm28', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'wwylele'] |
jsm28 assignee:jsm28 |
3-85918 3 days ago |
3-85919 3 days ago |
6-9201 6 days |
| 40435 |
bryangingechen author:bryangingechen |
ci: duplicate declarations report |
This adds a workflow that runs `lintDuplicateDeclarations` weekly and posts a summary to Zulip (with the full report in a workflow artifact).
Prepared with Claude code.
---
- [ ] depends on: #33640
|
merge-conflict |
350/0 |
.github/workflows/duplicate_decls_report.yml,Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/DuplicateDecls.lean,MathlibTest/Tactic/DuplicateDecls.lean,MathlibTest/Tactic/DuplicateDeclsAux.lean,docs/workflows.md,scripts/README.md,scripts/dup_decls_report.lean |
9 |
9 |
['bryangingechen', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib-splicebot'] |
nobody |
3-81328 3 days ago |
32-80406 32 days ago |
0-126 2 minutes |
| 39875 |
mkaratarakis author:mkaratarakis |
refactor(NumberField/House): expose Siegel lemma infrastructure |
Expose Siegel's lemma infrastructure in `NumberField.House`: rename the private
basis-matrix bound to `basisMatrixInvSupNorm`, make `house` reducible, and
adjust `exists_ne_zero_int_vec_house_le`.
Needed for #39874
---
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merge-conflict |
59/48 |
Mathlib/NumberTheory/NumberField/House.lean |
1 |
5 |
['github-actions', 'mathlib-merge-conflicts', 'mkaratarakis', 'tb65536'] |
nobody |
3-72867 3 days ago |
3-72868 3 days ago |
43-4796 43 days |
| 41411 |
grunweg author:grunweg |
perf( Mathlib/CategoryTheory/Sites/LocallySurjective.lean): investigate removing transitive import #41406 |
---
#41406, but on top of #41222
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|
merge-conflict |
1/3965 |
Mathlib/Algebra/AffineMonoid/Embedding.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Epi.lean,Mathlib/Algebra/Algebra/IsSimpleRing.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Opposite.lean,Mathlib/Algebra/Algebra/Pi.lean,Mathlib/Algebra/Algebra/Prod.lean,Mathlib/Algebra/Algebra/Spectrum/Pi.lean,Mathlib/Algebra/Algebra/StrictPositivity.lean,Mathlib/Algebra/Algebra/Subalgebra/Directed.lean,Mathlib/Algebra/Algebra/Subalgebra/Matrix.lean,Mathlib/Algebra/Algebra/Subalgebra/Rank.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/Azumaya/Basic.lean,Mathlib/Algebra/BigOperators/Expect.lean,Mathlib/Algebra/BigOperators/Field.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/BigOperators/GroupWithZero/Action.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/BigOperators/Ring/Multiset.lean,Mathlib/Algebra/BigOperators/Sym.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/AlgCat/Monoidal.lean,Mathlib/Algebra/Category/CoalgCat/ComonEquivalence.lean,Mathlib/Algebra/Category/CoalgCat/Monoidal.lean,Mathlib/Algebra/Category/FGModuleCat/EssentiallySmall.lean,Mathlib/Algebra/Category/Grp/Abelian.lean,Mathlib/Algebra/Category/Grp/Biproducts.lean,Mathlib/Algebra/Category/Grp/EnoughInjectives.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/Category/Grp/ForgetCorepresentable.lean,Mathlib/Algebra/Category/Grp/Images.lean,Mathlib/Algebra/Category/Grp/IsFinite.lean,Mathlib/Algebra/Category/Grp/Kernels.lean,Mathlib/Algebra/Category/Grp/LargeColimits.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/Grp/Ulift.lean,Mathlib/Algebra/Category/ModuleCat/AB.lean,Mathlib/Algebra/Category/ModuleCat/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/Algebra.lean,Mathlib/Algebra/Category/ModuleCat/Biproducts.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRingsExact.lean,Mathlib/Algebra/Category/ModuleCat/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Finite.lean,Mathlib/Algebra/Category/ModuleCat/Images.lean,Mathlib/Algebra/Category/ModuleCat/Localization.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Generator.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafify.lean,Mathlib/Algebra/Category/ModuleCat/Products.lean,Mathlib/Algebra/Category/ModuleCat/Projective.lean,Mathlib/Algebra/Category/ModuleCat/ProjectiveDimension.lean,Mathlib/Algebra/Category/ModuleCat/Pseudofunctor.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Localization.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PullbackFree.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PushforwardContinuous.lean,Mathlib/Algebra/Category/ModuleCat/Subobject.lean,Mathlib/Algebra/Category/MonCat/Basic.lean,Mathlib/Algebra/Category/MonCat/Colimits.lean,Mathlib/Algebra/Category/Ring/Epi.lean,Mathlib/Algebra/Category/Ring/EqualizerPushout.lean,Mathlib/Algebra/Category/Ring/Small.lean,Mathlib/Algebra/Category/Ring/Topology.lean,Mathlib/Algebra/Category/Ring/Under/Basic.lean,Mathlib/Algebra/Category/Semigrp/Basic.lean,Mathlib/Algebra/CharP/Algebra.lean,Mathlib/Algebra/CharP/Invertible.lean,Mathlib/Algebra/CharZero/AddMonoidHom.lean,Mathlib/Algebra/Colimit/DirectLimit.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/Colimit/Ring.lean,Mathlib/Algebra/ContinuedFractions/Computation/ApproximationCorollaries.lean,Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/ContinuedFractions/Computation/CorrectnessTerminating.lean,Mathlib/Algebra/ContinuedFractions/Computation/TerminatesIffRat.lean,Mathlib/Algebra/ContinuedFractions/Translations.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Decomposition.lean,Mathlib/Algebra/DirectSum/Finsupp.lean,Mathlib/Algebra/DirectSum/LinearMap.lean,Mathlib/Algebra/Divisibility/Prod.lean,Mathlib/Algebra/Exact/Basic.lean,Mathlib/Algebra/Exact/Sequence.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Field/ModEq.lean,Mathlib/Algebra/Field/NegOnePow.lean |
2595 |
6 |
['felixpernegger', 'github-actions', 'grunweg', 'leanprover-radar', 'mathlib-merge-conflicts'] |
nobody |
3-69667 3 days ago |
3-69668 3 days ago |
2-34691 2 days |
| 41140 |
YaelDillies author:YaelDillies |
chore(Data/ENat): replace `coe` with `natCast` in lemma names |
... following the naming convention
---
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[](https://gitpod.io/from-referrer/)
|
t-data
merge-conflict
|
329/246 |
Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Polynomial/Degree/TrailingDegree.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/SmoothSeries.lean,Mathlib/Analysis/Convex/Radon.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Deriv.lean,Mathlib/Analysis/Meromorphic/NormalForm.lean,Mathlib/Analysis/Meromorphic/Order.lean,Mathlib/CategoryTheory/Abelian/Injective/Dimension.lean,Mathlib/CategoryTheory/Abelian/Projective/Dimension.lean,Mathlib/Combinatorics/Matroid/IndepAxioms.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/Vertex.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/EdgeConnectivity.lean,Mathlib/Combinatorics/SimpleGraph/Diam.lean,Mathlib/Combinatorics/SimpleGraph/Girth.lean,Mathlib/Combinatorics/SimpleGraph/Metric.lean,Mathlib/Combinatorics/SimpleGraph/VertexCover.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/ENat/BigOperators.lean,Mathlib/Data/ENat/Defs.lean,Mathlib/Data/ENat/Lattice.lean,Mathlib/Data/ENat/Pow.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Seq/Basic.lean,Mathlib/Data/Set/Card.lean,Mathlib/Data/Set/PowersetCard.lean,Mathlib/Dynamics/TopologicalEntropy/CoverEntropy.lean,Mathlib/Dynamics/TopologicalEntropy/NetEntropy.lean,Mathlib/Dynamics/TopologicalEntropy/Subset.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/GroupTheory/Perm/MaximalSubgroups.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/NumberTheory/ModularForms/LevelOne/DimensionFormula.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Ideal.lean,Mathlib/NumberTheory/Padics/PadicVal/Basic.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Probability/Martingale/BorelCantelli.lean,Mathlib/Probability/Martingale/OptionalStopping.lean,Mathlib/Probability/Martingale/Upcrossing.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/DiscreteValuationRing/Basic.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/NatInt.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/RingTheory/MvPowerSeries/NoZeroDivisors.lean,Mathlib/RingTheory/MvPowerSeries/Order.lean,Mathlib/RingTheory/MvPowerSeries/PiTopology.lean,Mathlib/RingTheory/OrderOfVanishing/Basic.lean,Mathlib/RingTheory/OrderOfVanishing/Noetherian.lean,Mathlib/RingTheory/Polynomial/Eisenstein/Distinguished.lean,Mathlib/RingTheory/PowerSeries/Order.lean,Mathlib/RingTheory/RamificationInertia/Ramification.lean,Mathlib/RingTheory/UniqueFactorizationDomain/Multiplicity.lean,Mathlib/SetTheory/Cardinal/Embedding.lean,Mathlib/SetTheory/Cardinal/NatCount.lean,Mathlib/Tactic/ENatToNat.lean,Mathlib/Topology/CWComplex/Classical/Basic.lean,Mathlib/Topology/Instances/AddCircle/Defs.lean,Mathlib/Topology/Instances/ENat.lean |
63 |
4 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
2-78627 2 days ago |
2-78628 2 days ago |
9-67051 9 days |
| 40282 |
rosborn author:rosborn |
feat(Algebra/Group/Subgroup): add sup/iSup/biSup/sSup_characteristic |
The join of characteristic subgroups is characteristic.
---
These mirror the existing sup_normal/iSup_normal/biSup_normal/sSup_normal family in Subgroup/Pointwise.lean. I've left out the inf versions and extras like the characteristic closure until there's a use for them; they're easy to add later.
Discussed here: [Zulip](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Additional.20Group.20Theory.20Lemmas/with/600714666)
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|
t-algebra
merge-conflict
label:t-algebra$ |
24/0 |
Mathlib/Algebra/Group/Subgroup/Basic.lean |
1 |
6 |
['SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'rosborn'] |
themathqueen assignee:themathqueen |
1-58075 1 day ago |
1-58076 1 day ago |
34-84772 34 days |
| Number |
Author |
Title |
Description |
Labels |
+/- |
Modified files (first 100) |
📝 |
💬 |
All users who commented or reviewed |
Assignee(s) |
Updated |
Last status change |
total time in review |
| 14563 |
awueth author:awueth |
feat: if-then-else of exclusive or statement |
---
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If `¬(P ∧ Q)` then `ite (P ∨ Q) a 1 = (ite P a 1) * (ite Q a 1)`
[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-algebra
new-contributor
label:t-algebra$ |
5/0 |
Mathlib/Algebra/Group/Basic.lean |
1 |
3 |
['eric-wieser', 'github-actions', 'kim-em'] |
nobody |
696-29447 1 year ago |
726-76429 726 days ago |
6-38745 6 days |
| 12751 |
Command-Master author:Command-Master |
feat: add lemmas for Nat/Bits, Nat/Bitwise and Nat/Size |
Remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`.
---
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|
merge-conflict
t-data
new-contributor
|
66/7 |
Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Nat/Size.lean |
4 |
26 |
['Command-Master', 'Rida-Hamadani', 'Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'jcommelin'] |
nobody |
692-14356 1 year ago |
727-20578 727 days ago |
56-40668 56 days |
| 15121 |
Eloitor author:Eloitor |
feat: iff theorems for IsSplitEpi and IsSplitMono in opposite category |
---
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[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-category-theory
new-contributor
|
40/0 |
Mathlib/CategoryTheory/EpiMono.lean |
1 |
3 |
['github-actions', 'joelriou', 'mattrobball'] |
nobody |
678-75591 1 year ago |
710-34850 710 days ago |
7-3203 7 days |
| 14242 |
js2357 author:js2357 |
feat: Prove equivalence of `isDedekindDomain` and `isDedekindDomainDvr` |
Prove that `isDedekindDomainDvr` is equivalent to both `isDedekindDomain` and `isDedekindDomainInv`.
Specifically, prove `isDedekindDomainDvr A → isDedekindDomainInv A`, because `isDedekindDomain A → isDedekindDomainDvr A` and `IsDedekindDomain A ↔ IsDedekindDomainInv A` are already in Mathlib.
- [x] depends on: #14099
- [x] depends on: #14216
- [ ] depends on: #14237
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
blocked-by-other-PR
new-contributor
label:t-algebra$ |
269/1 |
Mathlib.lean,Mathlib/RingTheory/DedekindDomain/Dvr.lean,Mathlib/RingTheory/FractionalIdeal/LocalizedAtPrime.lean,Mathlib/RingTheory/Localization/Basic.lean |
4 |
2 |
['github-actions'] |
nobody |
656-250 1 year ago |
743-75597 743 days ago |
0-273 4 minutes |
| 16887 |
metinersin author:metinersin |
feat(ModelTheory/Complexity): define conjunctive and disjunctive formulas |
Defines `FirstOrder.Language.BoundedFormula.IsConjunctive` and `FirstOrder.Language.BoundedFormula.IsDisjunctive`.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
blocked-by-other-PR
new-contributor
t-logic
|
300/7 |
Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean |
3 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
647-82628 1 year ago |
663-24302 663 days ago |
0-1299 21 minutes |
| 16888 |
metinersin author:metinersin |
feat(ModelTheory/Complexity): Define conjunctive and disjunctive normal forms |
Define `FirstOrder.Language.BoundedFormula.IsDNF` and `FirstOrder.Language.BoundedFormula.IsCNF`.
---
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- [ ] depends on: #16887
[](https://gitpod.io/from-referrer/)
|
merge-conflict
blocked-by-other-PR
new-contributor
t-logic
|
415/7 |
Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean |
3 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
647-82628 1 year ago |
663-24303 663 days ago |
0-1045 17 minutes |
| 16889 |
metinersin author:metinersin |
feat(ModelTheory/Complexity): Normal forms |
Defines `FirstOrder.Language.BoundedFormula.toDNF` and `FirstOrder.Language.BoundedFormula.toCNF` - given a quantifier-free formula, these construct a semantically equivalent formula in disjunctive normal form and conjunctive normal form, respectively.
---
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- [ ] depends on: #16888
[](https://gitpod.io/from-referrer/)
|
merge-conflict
blocked-by-other-PR
new-contributor
t-logic
|
525/7 |
Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean |
3 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
647-82627 1 year ago |
663-20053 663 days ago |
0-613 10 minutes |
| 12750 |
Command-Master author:Command-Master |
feat: define Gray code |
---
Define binary reflected gray code, both as a permutation of `Nat` and as a permutation of `BitVec n`, and prove some theorems about them. Additionally, remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`.
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- [ ] depends on: #12751
[](https://gitpod.io/from-referrer/)
|
blocked-by-other-PR
t-data
new-contributor
merge-conflict
awaiting-author
|
226/0 |
Mathlib.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/GrayCode.lean,Mathlib/Data/Nat/Size.lean |
5 |
5 |
['Rida-Hamadani', 'alreadydone', 'github-actions', 'grunweg'] |
nobody |
630-18885 1 year ago |
779-983 779 days ago |
16-49744 16 days |
| 14598 |
Command-Master author:Command-Master |
chore: add typeclasses to unify various `add_top`, `add_eq_top`, etc. |
Add the four typeclasses `IsTopAbsorbing`, `IsBotAbsorbing`, `NoTopSum`, `NoBotSum`, as additive equivalents for `MulZeroClass` and `NoZeroDivisors`. Add instances of these for `ENNReal`, `WithTop α`, `WithBot α`, `PUnit`, `EReal`, `PartENat`, `Measure`, `Interval` and `Filter`.
Also split `Algebra/Order/AddGroupWithTop` to `Algebra/Order/Group/WithTop` and `Algebra/Order/Monoid/WithTop`
---
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Previous usages of lemmas with quantified names like `WithTop.add_top` have to be changed to just `add_top`.
`add_lt_top` is `@[simp]`, in accordance with `ENNReal.add_lt_top` being `@[simp]`. This affects `WithTop.add_lt_top` which previously hadn't been `@[simp]`.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
t-order
new-contributor
label:t-algebra$ |
264/195 |
Archive/Wiedijk100Theorems/BallotProblem.lean,Mathlib.lean,Mathlib/Algebra/Order/Group/WithTop.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/PUnitInstances/Order.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Analytic/Meromorphic.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/NormedSpace/ENorm.lean,Mathlib/Analysis/SpecialFunctions/JapaneseBracket.lean,Mathlib/Analysis/SpecialFunctions/Log/ENNRealLog.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Nat/WithBot.lean,Mathlib/Data/Real/EReal.lean,Mathlib/LinearAlgebra/Lagrange.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Decomposition/Lebesgue.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL1.lean,Mathlib/MeasureTheory/Function/Jacobian.lean,Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Function/LpSpace.lean,Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Integral/Bochner.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean,Mathlib/MeasureTheory/Integral/VitaliCaratheodory.lean,Mathlib/MeasureTheory/Measure/Hausdorff.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Measure/LevyProkhorovMetric.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/Measure/Regular.lean,Mathlib/MeasureTheory/Measure/Typeclasses.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/Probability/Martingale/Convergence.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/RingTheory/MvPowerSeries/NoZeroDivisors.lean,Mathlib/RingTheory/UniqueFactorizationDomain.lean,Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/HausdorffDistance.lean,Mathlib/Topology/MetricSpace/Lipschitz.lean |
57 |
30 |
['Command-Master', 'YaelDillies', 'github-actions'] |
nobody |
613-47161 1 year ago |
613-47161 613 days ago |
7-45599 7 days |
| 16885 |
metinersin author:metinersin |
feat(ModelTheory/Complexity): define literals |
Defines `FirstOrder.Language.BoundedFormula.IsLiteral` and `FirstOrder.Language.BoundedFormula.simpleNot` - an auxiliary operation that takes the negation of a formula and does some simplification.
---
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- [x] depends on: #16800
[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
new-contributor
t-logic
|
148/5 |
Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Syntax.lean |
4 |
20 |
['YaelDillies', 'awainverse', 'github-actions', 'mathlib4-dependent-issues-bot', 'metinersin'] |
nobody |
611-3282 1 year ago |
646-78994 646 days ago |
0-19926 5 hours |
| 13248 |
hcWang942 author:hcWang942 |
feat: basic concepts of auction theory |
## Description
Formalise some core concepts and results in auction theory: this includes definitions for first-price and second-price auctions, as well as several fundamental results and helping lemmas.
This is the very first PR of the project formalizing core concepts and results in auction theory.
Our group is working on more contributions on the formalization of game theory prefix.
Co-authored-by: Ma Jiajun <hoxide@gmail.com>
## Reference
Roughgarden, Tim. ***Twenty Lectures on Algorithmic Game Theory***. Cambridge University Press, 2020. [Link](https://www.cambridge.org/core/books/twenty-lectures-on-algorithmic-game-theory/A9D9427C8F43E7DAEF8C702755B6D72B)
---
- [x] Will depend on #14163 once that PR is merged. The Fintype lemmas introduced by this PR have been added in that PR and will be removed from here once that PR gets merged
## Current plan for formalization of Game Theory
The current plan for the formalizing of Game Theory include:
#### 1. Auction Theory. 🎉 _(200+ lines, this PR)_
- Essential definitions of Sealed-bid auction, First-price auction and Second-price auction.
- First-price auction has no dominant strategy.
- Second-price auction has dominant strategy. (Second-price auction is DSIC)
#### 2. Mechanism design & Myerson's Lemma. 🎉 (400+ lines, pending for modification to Mathlib Standard)
- Mechanism design
An allocation rule is implementable if there exists
- Dominant Strategy Incentive Compatible (DSIC) payment rule
- An allocation rule is monotone if for every bidder’s gain is nondecreasing w.r.t. her/his bid
- Myerson's Lemma
Implementable ⇔ Monotone
In the above case, the DSIC payment rule is unique.
#### 3. von Neumann‘s Minimax Theorem. 🎉 (800+ lines, pending for modification to Mathlib Standard)
- Equilibrium in zero sum game
- Formalization strategy: via Loomis’s theorem.
#### 4. Nash Equilibrium. 🎉 (pending for modification to Mathlib Standard)
#### 5. Brouwer fixed-point theorem. (Work in Progress)
#### 6. More Mechanism design. (Planning)
|
merge-conflict
awaiting-author
new-contributor
t-logic
|
204/0 |
Mathlib.lean,Mathlib/GameTheory/Auction/Basic.lean,docs/references.bib |
3 |
148 |
['Shreyas4991', 'YaelDillies', 'eric-wieser', 'faenuccio', 'github-actions', 'grunweg', 'hcWang942', 'tb65536', 'urkud', 'vihdzp'] |
hcWang942 assignee:hcWang942 |
606-42114 1 year ago |
620-28302 620 days ago |
109-82807 109 days |
| 19125 |
yhtq author:yhtq |
feat: add theorems to transfer `IsGalois` between pairs of fraction rings |
feat: add theorems to transfer `IsGalois` between pairs of fraction rings.
- [x] depends on: #18404
- [x] depends on: #19124
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
new-contributor
label:t-algebra$ |
121/0 |
Mathlib.lean,Mathlib/FieldTheory/Galois/IsFractionRing.lean,Mathlib/RingTheory/Localization/FractionRing.lean |
3 |
3 |
['github-actions', 'mathlib4-dependent-issues-bot', 'tb65536'] |
nobody |
576-64531 1 year ago |
603-25913 603 days ago |
0-1980 33 minutes |
| 17739 |
Aaron1011 author:Aaron1011 |
feat(Topology/Order/DenselyOrdered): prove Not (IsOpen) for intervals |
Prove that Iic/Ici/Ioc/Ico/Icc intervals are not open in densely ordered topologies with no min/max element
---
[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-topology
new-contributor
|
27/0 |
Mathlib/Topology/Order/DenselyOrdered.lean |
1 |
8 |
['github-actions', 'vihdzp'] |
nobody |
543-143 1 year ago |
635-78113 635 days ago |
0-4704 1 hour |
| 15711 |
znssong author:znssong |
feat(Combinatorics/SimpleGraph): Some lemmas about walk, cycle and Hamiltonian cycle |
---
These lemmas are separated from the `meow-sister/BondyChvatal` branch and will be needed for the proof of the Bondy-Chvátal theorem.
- [x] depends on: #15536
- [x] depends on: #16294 |
merge-conflict
awaiting-author
t-combinatorics
new-contributor
|
407/3 |
Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Path.lean,Mathlib/Combinatorics/SimpleGraph/Walk.lean |
4 |
22 |
['Rida-Hamadani', 'YaelDillies', 'github-actions', 'mathlib4-dependent-issues-bot', 'znssong'] |
nobody |
542-19229 1 year ago |
663-30390 663 days ago |
9-13962 9 days |
| 18629 |
tomaz1502 author:tomaz1502 |
feat(Computability.Timed): Formalization of runtime complexity of List.merge |
This PR adds the formalization of the runtime complexity of the merge function, defined in `Data/List/Sort`.
Requires: https://github.com/leanprover-community/mathlib4/pull/15450
References:
- Previous PR on mathlib3: https://github.com/leanprover-community/mathlib3/pull/14494/
- First discussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/BSc.20Final.20Project/near/220647062
- Second disussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Formalization.20of.20Runtime.20Complexity.20of.20Sorting.20Algorithms/near/284184450
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-computability
awaiting-author
new-contributor
|
186/0 |
Mathlib.lean,Mathlib/Computability/Timed/InsertionSort.lean,Mathlib/Computability/Timed/Merge.lean |
3 |
2 |
['github-actions', 'trivial1711'] |
nobody |
541-71548 1 year ago |
581-71161 581 days ago |
33-11262 33 days |
| 18461 |
hannahfechtner author:hannahfechtner |
feat: left and right common multiples mixins |
add mixins for left and right common multiples. These carry the data of what factors are used to create the common multiples
---
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[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-algebra
new-contributor
label:t-algebra$ |
78/0 |
Mathlib/Algebra/Group/Defs.lean |
1 |
13 |
['github-actions', 'hannahfechtner', 'jcommelin', 'kbuzzard', 'kim-em', 'trivial1711'] |
nobody |
538-32728 1 year ago |
538-32728 538 days ago |
69-35596 69 days |
| 19291 |
PieterCuijpers author:PieterCuijpers |
feat(Algebra/Order/Hom): add quantale homomorphism |
Definition of quantale homomorphisms as functions that are both semigroup homomorphisms and complete lattice homomorphisms.
---
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- [x] depends on: #19810
- [x] depends on: #19811
[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-algebra
new-contributor
label:t-algebra$ |
209/0 |
Mathlib.lean,Mathlib/Algebra/Order/Hom/Quantale.lean,scripts/noshake.json |
3 |
29 |
['PieterCuijpers', 'YaelDillies', 'github-actions', 'kim-em', 'mathlib4-dependent-issues-bot'] |
nobody |
537-6807 1 year ago |
542-60608 542 days ago |
29-51480 29 days |
| 20372 |
jvlmdr author:jvlmdr |
feat(MeasureTheory/Function): Add ContinuousLinearMap.bilinearCompLp(L) |
Introduce ContinuousLinearMap.bilinearCompLp and bilinearCompLpL.
Generalize eLpNorm_le_eLpNorm_mul_eLpNorm theorems to include constant C in bound condition.
---
Expect this may be useful for defining tempered distributions from functions in `L^p`.
The definitions more or less follow `ContinuousLinearMap.compLp...`. Names are loosely analogous to `ContinuousLinearMap.bilinearComp` and `SchwartzMap.bilinLeftCLM`.
Note: I preferred the spelling `hpqr : p⁻¹ + q⁻¹ = r⁻¹` with `f` in `L^p` and `g` in `L^q` to `hpqr : 1 / p = 1 / q + 1 / r`. It's easier to obtain from `ENNReal.IsConjExponent` too.
A few questions:
- [ ] I defined `bilinear{Left,Right}LpL` in addition to `bilinearCompLpL` because `LinearMap.mkContinuous₂` is marked as `noncomputable` and `LinearMap.mkContinuous` is not. Is this worth the extra definitions? (Note: This is not visible in the source due to `noncomputable section`.)
- [ ] Should I use `C : ℝ` instead of `C : NNReal` for `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'`?
- [ ] Is it going to be painful to have `[Fact (1 ≤ p)] [Fact (1 ≤ q)] [Fact (1 ≤ r)]`? I don't think there's a way to avoid it though. Maybe providing specialized versions for `p.IsConjExponent q` with `L^1`?
Naming:
- [ ] Is it satisfactory to add a `'` to the `eLpNorm_le_eLpNorm_mul_eLpNorm ` definitions in `CompareExp.lean` where `≤ ‖f x‖ * ‖g x‖` has been replaced with `≤ C * ‖f x‖ * ‖g x‖`? These could replace the existing theorems, although I don't want to break backwards compatibility. There are 5 instances: `eLpNorm_le_eLpNorm_top_mul_eLpNorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm_top'`, `eLpNorm'_le_eLpNorm'_mul_eLpNorm''`, `eLpNorm_le_eLpNorm_mul_eLpNorm_of_nnnorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'` (I'm not sure why the existing theorem `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm` has an internal `'`)
- [ ] Is `bilinearLeftLpL` a suitable name? Other options: `bilinearCompLpLeftL`, `bilinearCompLeftLpL`, `bilinLeftLpL` (analogous to `SchwartzMap.bilinLeftCLM`)
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-measure-probability
new-contributor
|
203/40 |
Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSpace.lean |
2 |
1 |
['github-actions'] |
nobody |
530-24155 1 year ago |
530-24155 530 days ago |
27-43617 27 days |
| 20248 |
peabrainiac author:peabrainiac |
feat(Topology/Compactness): first-countable locally path-connected spaces are delta-generated |
Shows that all first-countable locally path-connected spaces are delta-generated (so in particular all normed spaces and convex subsets thereof are), and that delta-generated spaces are equivalently generated by the unit interval or standard simplices.
---
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- [ ] depends on: #21616
In principle, this should be close to all that's required to show that all simplicial complexes and CW-complexes are delta-generated; I just haven't done it yet because I'm not sure which file to best do it in.
[](https://gitpod.io/from-referrer/)
|
blocked-by-other-PR
large-import
new-contributor
merge-conflict
awaiting-author
t-topology
|
1189/813 |
Mathlib.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Topology/Algebra/Module/LocallyConvex.lean,Mathlib/Topology/Compactness/DeltaGeneratedSpace.lean,Mathlib/Topology/Connected/LocPathConnected.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/Homotopy/HSpaces.lean,Mathlib/Topology/Path.lean |
9 |
22 |
['YaelDillies', 'github-actions', 'kbuzzard', 'mathlib4-dependent-issues-bot', 'peabrainiac'] |
nobody |
517-67865 1 year ago |
524-32382 524 days ago |
39-21495 39 days |
| 19943 |
AlexLoitzl author:AlexLoitzl |
feat(Computability): Add Chomsky Normal Form Grammar and translation |
- Define Chomsky normal form grammars
- Add language-preserving translation between context-free grammars and Chomsky normal form grammars
Co-authored-by: Martin Dvorak martin.dvorak@matfyz.cz
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-computability
awaiting-author
new-contributor
|
3151/0 |
Mathlib.lean,Mathlib/Computability/ChomskyNormalForm/Basic.lean,Mathlib/Computability/ChomskyNormalForm/EmptyElimination.lean,Mathlib/Computability/ChomskyNormalForm/LengthRestriction.lean,Mathlib/Computability/ChomskyNormalForm/TerminalRestriction.lean,Mathlib/Computability/ChomskyNormalForm/Translation.lean,Mathlib/Computability/ChomskyNormalForm/UnitElimination.lean,Mathlib/Computability/ContextFreeGrammar.lean |
8 |
59 |
['AlexLoitzl', 'YaelDillies', 'github-actions', 'kim-em', 'madvorak'] |
nobody |
513-15564 1 year ago |
520-27186 520 days ago |
37-29014 37 days |
| 21501 |
sksgurdldi author:sksgurdldi |
feat(List): add sum_zipWith_eq_finset_sum |
### **Description:**
This PR adds the lemma `List.sum_zipWith_eq_finset_sum` to `Mathlib.Algebra.BigOperators.Group.Finset.Basic`.
#### **Statement:**
The sum of the `zipWith` operation on two lists equals the sum of applying the operation to corresponding elements of the two lists, indexed over the minimum of their lengths.
#### **Formal Statement:**
```lean
lemma sum_zipWith_eq_finset_sum [Inhabited α] [Inhabited β] [AddCommMonoid γ]
{op : α → β → γ}
(l : List α) (m : List β) :
(List.zipWith op l m).sum =
∑ x ∈ (Finset.range (Nat.min l.length m.length)), op (l[x]!) (m[x]!)
```
#### **Remarks:**
- This lemma provides a useful equivalence between `List.zipWith` and summation over a `Finset.range` indexed by `Nat.min l.length m.length`.
- It can be helpful in algebraic manipulations involving list-based summations.
#### **Dependencies:**
No additional dependencies.
---
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[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-algebra
new-contributor
label:t-algebra$ |
43/0 |
Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean |
1 |
1 |
['github-actions', 'j-loreaux'] |
nobody |
507-70735 1 year ago |
507-70735 507 days ago |
13-33168 13 days |
| 21959 |
BGuillemet author:BGuillemet |
feat(Topology/ContinuousMap): Stone-Weierstrass theorem for MvPolynomial |
Add the subalgebra of multivariate polynomials and prove it separates points, on the same model as `ContinuousMap/Polynomial.lean`.
Prove the Stone-Weierstrass theorem and some variations for multivariate polynomials.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-topology
new-contributor
|
285/1 |
Mathlib.lean,Mathlib/Topology/ContinuousMap/MvPolynomial.lean,Mathlib/Topology/ContinuousMap/StoneWeierstrass.lean |
3 |
1 |
['github-actions'] |
nobody |
494-10176 1 year ago |
494-10176 494 days ago |
16-76141 16 days |
| 15578 |
znssong author:znssong |
feat(Function): Fixed points of function `f` with `f(x) >= x` |
We added some lemmas of fixed points of function `f` with `f(x) >= x`, where `f : α → α` is a function on a finite type `α`. This will be needed in proof of Bondy-Chvátal theorem.
---
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See also branch `meow-sister/BondyChvatal`.
[](https://gitpod.io/from-referrer/) |
merge-conflict
awaiting-author
t-analysis
new-contributor
|
82/0 |
Mathlib.lean,Mathlib/Dynamics/FixedPoints/Basic.lean,Mathlib/Dynamics/FixedPoints/Increasing.lean |
3 |
32 |
['Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'urkud', 'vihdzp', 'znssong'] |
nobody |
486-6002 1 year ago |
669-9231 669 days ago |
29-48368 29 days |
| 21018 |
markimunro author:markimunro |
feat(Data/Matrix): add file with key definitions and theorems about elementary row operations |
Prove that each elementary row operation is equivalent to a multiplication by an elementary matrix, has another row operation which inverts it, and that each elementary matrix has a left inverse.
This is a very large PR and I understand it will take time. This is my first one and will likely have issues but I will be ready to answer questions/fix them as soon as possible.
Co-authored-by: Christopher Lynch <clynch@clarkson.edu>
---
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[](https://gitpod.io/from-referrer/)
|
t-data
enhancement
new-contributor
merge-conflict
awaiting-author
|
1230/0 |
Mathlib.lean,Mathlib/Data/Matrix/ElementaryRowOperations.lean,Mathlib/Data/Matrix/GaussianElimination.lean,Mathlib/Data/Matrix/GaussianEliminationOld,Mathlib/Data/Matrix/oldnames,et --hard 18533caba32,lean-toolchain |
7 |
17 |
['chrisflav', 'eric-wieser', 'github-actions', 'j-loreaux', 'markimunro'] |
nobody |
467-41401 1 year ago |
492-70357 492 days ago |
23-22681 23 days |
| 15212 |
victorliu5296 author:victorliu5296 |
feat: Add fundamental theorem of calculus-2 for Banach spaces |
add the Mean Value Theorem for Banach spaces to the library and include reference for the theorem statement
This theorem states that if `f : X → Y` is differentiable along the line segment from `a` to `b`, then the change in `f` equals the integral of its derivative along this path. This extends the mean value theorem to Banach spaces. This can be used for the eventual proof of the Newton-Kantorovich theorem with 1 constant contained inside the added reference.
Here is the discussion on Zulipchat: https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Contributing.20FTC-2.20for.20Banach.20spaces |
t-measure-probability
new-contributor
merge-conflict
awaiting-author
t-analysis
|
60/1 |
Mathlib/MeasureTheory/Integral/FundThmCalculus.lean |
1 |
3 |
['github-actions', 'hrmacbeth', 'victorliu5296'] |
nobody |
462-36390 1 year ago |
656-13761 656 days ago |
51-85104 51 days |
| 21488 |
imbrem author:imbrem |
feat(CategoryTheory/Monoidal): premonoidal categories |
Add support for premonoidal categories
---
Still want to add support for:
- Premonoidal braided/symmetric categories
- The monoidal coherence theorem, which I've already ported in my `discretion` library
- The `coherence` tactic, which should work fine for premonoidal categories too
but wanted to get this in front of reviewers ASAP to make sure my general approach was alright
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-category-theory
new-contributor
|
900/361 |
Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/CategoryTheory/Bicategory/End.lean,Mathlib/CategoryTheory/GradedObject/Monoidal.lean,Mathlib/CategoryTheory/Localization/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Monoidal/CoherenceLemmas.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/CategoryTheory/Monoidal/End.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/MonoidalComp.lean,MathlibTest/StringDiagram.lean |
21 |
9 |
['YaelDillies', 'github-actions', 'grunweg', 'imbrem', 'kim-em', 'leanprover-community-bot-assistant'] |
nobody |
459-18578 1 year ago |
459-18579 459 days ago |
58-6028 58 days |
| 20873 |
vbeffara author:vbeffara |
feat(Topology/Covering): path lifting and homotopy lifting |
This proves the existence and uniqueness of path and homotopy lifts through covering maps.
---
I tried to separate as much of the proof as possible into separate PRs (which are already in Mathlib now), but the proof here relies on a monolithic construction of an explicit lift along a well-chosen subdivision, in `partial_lift`, with associated definitions. Only one standalone lean file added.
An older WIP PR #10084 by Junyan Xu @alreadydone proves similar results using a very similar construction for path lifting, with a different argument to obtain continuity for homotopy lifting.
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-topology
new-contributor
|
281/1 |
Mathlib.lean,Mathlib/Topology/Covering/Basic.lean,Mathlib/Topology/Covering/Lift.lean |
3 |
9 |
['alreadydone', 'github-actions', 'grunweg', 'vbeffara'] |
nobody |
458-21306 1 year ago |
533-14101 533 days ago |
5-5613 5 days |
| 20313 |
thefundamentaltheor3m author:thefundamentaltheor3m |
feat(Data/Complex/Exponential): prove some useful results about the complex exponential. |
This PR proves two basic results about the complex exponential:
* `abs_exp_mul_I (x : ℂ) : abs (Complex.exp (I * x)) = Real.exp (-x.im)`
* `one_sub_rexp_re_le_abs_one_sub_cexp (x : ℂ) : 1 - Real.exp x.re ≤ Complex.abs (1 - Complex.exp x)`
Both results were proved as part of the sphere packing project. There's a chance they're too specific for mathlib, but I thought they were worth PRing anyway. Would it also be a good idea to tag `abs_exp_mul_I` with `simp`? Feedback/suggestions welcome.
Note: `one_sub_rexp_re_le_abs_one_sub_cexp` was proved by Bhavik Mehta @b-mehta
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-analysis
new-contributor
|
167/141 |
Mathlib.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/SpecialFunctions/Log/ERealExp.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev.lean,Mathlib/Data/Complex/Exponential/Defs.lean,Mathlib/Data/Complex/Exponential/Lemmas.lean,Mathlib/Data/Complex/ExponentialBounds.lean,Mathlib/Tactic/FunProp.lean,MathlibTest/Recall.lean,MathlibTest/positivity.lean |
10 |
12 |
['b-mehta', 'github-actions', 'kim-em', 'thefundamentaltheor3m', 'trivial1711'] |
nobody |
450-78904 1 year ago |
534-3762 534 days ago |
8-42240 8 days |
| 20730 |
kuotsanhsu author:kuotsanhsu |
feat(LinearAlgebra/Matrix/SchurTriangulation): prove Schur decomposition/triangulation |
`Matrix.schur_triangulation` shows that a matrix over an algebraically closed field is unitarily similar to an upper triangular matrix
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-algebra
new-contributor
label:t-algebra$ |
317/2 |
Mathlib.lean,Mathlib/LinearAlgebra/Matrix/Block.lean,Mathlib/LinearAlgebra/Matrix/SchurTriangulation.lean,Mathlib/Logic/Equiv/Basic.lean |
4 |
14 |
['eric-wieser', 'github-actions', 'kim-em', 'kuotsanhsu'] |
nobody |
450-75036 1 year ago |
530-66009 530 days ago |
13-56244 13 days |
| 22809 |
b-reinke author:b-reinke |
feat: Category algebras and path algebras |
This PR defines the category algebra of a linear category and path algebras of quivers.
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
WIP
t-algebra
t-category-theory
new-contributor
label:t-algebra$ |
218/0 |
Mathlib/Algebra/Ring/Assoc.lean,Mathlib/CategoryTheory/Linear/CategoryAlgebra.lean,Mathlib/Combinatorics/Quiver/PathAlgebra.lean,Mathlib/Data/DFinsupp/BigOperators.lean |
4 |
2 |
['b-reinke', 'github-actions'] |
nobody |
435-39475 1 year ago |
unknown |
0-0 0 seconds |
| 15654 |
TpmKranz author:TpmKranz |
feat(Computability): language-preserving maps between NFA and RE |
Map REs to NFAs via Thompson's construction and NFAs to REs using GNFAs
Last chunk of #12648
---
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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 |
432-72154 1 year ago |
702-8939 702 days ago |
0-179 2 minutes |
| 24008 |
meithecatte author:meithecatte |
chore(EpsilonNFA): replace manual lemmas with @[simps] |
---
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[](https://gitpod.io/from-referrer/)
|
t-computability
awaiting-author
new-contributor
|
2/24 |
Mathlib/Computability/EpsilonNFA.lean |
1 |
2 |
['YaelDillies', 'github-actions', 'urkud'] |
nobody |
427-31333 1 year ago |
427-31333 427 days ago |
27-52316 27 days |
| 23349 |
BGuillemet author:BGuillemet |
feat: add LocallyLipschitzOn.lipschitzOnWith_of_isCompact and two small lemmas about Lipschitz functions |
Main feat (in Mathlib/Topology/EMetricSpace/Basic.lean): if a function `f` from an extended pseudometric space to a pseudometric space is locally Lipschitz on a compact subset `s`, then `f` is Lipschitz on `s`. The theorem is true only when the codomain of `f` is a pseudometric space, so it needs imports from Mathlib/Topology/MetricSpace.
Other small feat (in Mathlib/Analysis/Calculus/ContDiff/RCLike.lean): a function that is continuously differentiable on an open subset is locally Lipschitz on this subset.
---
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- [ ] depends on: #22890
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-topology
large-import
new-contributor
|
59/4 |
Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Topology/EMetricSpace/Lipschitz.lean |
2 |
4 |
['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] |
PatrickMassot assignee:PatrickMassot |
411-3674 1 year ago |
411-3676 411 days ago |
35-30364 35 days |
| 12799 |
jstoobysmith author:jstoobysmith |
feat(LinearAlgebra/UnitaryGroup): Add properties of Special Unitary Group |
Add properties of the special unitary group, mirroring the properties of found in Algebra/Star/Unitary.lean. In particular, I add an instance of `specialUnitaryGroup` as a `Group`, `Star`, `InvolutiveStar`, and `StarMul`.
---
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[](https://gitpod.io/from-referrer/)
|
please-adopt
t-algebra
new-contributor
merge-conflict
awaiting-author
label:t-algebra$ |
78/0 |
Mathlib/LinearAlgebra/UnitaryGroup.lean |
1 |
8 |
['chrisflav', 'jcommelin', 'leanprover-community-bot-assistant'] |
nobody |
400-62027 1 year ago |
784-3280 784 days ago |
9-22045 9 days |
| 20334 |
miguelmarco author:miguelmarco |
feat: allow polyrith to use a local Singular/Sage install |
Try to call a local install of Singular (either standalone or inside Sage) to find the witness for polyrith before trying to call the online sage cell server.
---
[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
new-contributor
t-meta
|
171/48 |
Mathlib/Tactic/Polyrith.lean,scripts/polyrith_sage.py |
2 |
16 |
['eric-wieser', 'github-actions', 'hanwenzhu', 'kim-em', 'miguelmarco', 'mkoeppe'] |
nobody |
393-54580 1 year ago |
532-6161 532 days ago |
27-61515 27 days |
| 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 |
372-51341 1 year ago |
405-26458 405 days ago |
6-44783 6 days |
| 10190 |
jstoobysmith author:jstoobysmith |
feat(AlgebraicTopology): add Augmented Simplex Category |
- Added the definition of the category FinLinOrd of finite linear ordered sets.
- Added the definition of the augmented simplex category `AugmentedSimplexCategory`, and showed it is the Skeleton of FinLinOrd.
- Showed that the category of augmented simplicial objects defined as a comma category is equivalent to the category of functors from `AugmentedSimplexCategory^\op`
---
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[](https://gitpod.io/from-referrer/)
|
t-algebraic-topology
WIP
t-category-theory
new-contributor
merge-conflict
|
720/0 |
Mathlib.lean,Mathlib/AlgebraicTopology/AugmentedSimplexCategory.lean,Mathlib/AlgebraicTopology/SimplicialObject.lean,Mathlib/Order/Category/FinLinOrd.lean |
4 |
5 |
['TwoFX', 'YaelDillies', 'joelriou', 'jstoobysmith'] |
nobody |
346-23481 11 months ago |
883-16407 883 days ago |
7-63253 7 days |
| 25238 |
Hagb author:Hagb |
feat(Tactic/ComputeDegree): add support for scalar multiplication with different types |
It would be able to deal with `a • (X : R[X])` where `a : S` is in a different type `S` with `[SMulZeroClass S R]`.
---
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- [x] depends on: #25237
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-meta
new-contributor
|
17/5 |
Mathlib/Tactic/ComputeDegree.lean,MathlibTest/ComputeDegree.lean |
2 |
3 |
['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] |
nobody |
342-29672 11 months ago |
372-51341 372 days ago |
38-26044 38 days |
| 18646 |
jxjwan author:jxjwan |
feat(RingTheory): isotypic components |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-ring-theory
new-contributor
|
308/0 |
Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/RingTheory/Isotypic.lean,Mathlib/RingTheory/SimpleModule.lean |
3 |
1 |
['github-actions'] |
nobody |
341-31693 11 months ago |
594-25286 594 days ago |
20-15640 20 days |
| 28502 |
gilesgshaw author:gilesgshaw |
feat(Logic/Basic): avoid unnecessary uses of choice |
Certain proofs are modified to remove a dependence on the axoim of choice
---
- [ ] depends on: #28623
|
blocked-by-other-PR
new-contributor
merge-conflict
awaiting-author
t-logic
|
83/74 |
Mathlib/Logic/Basic.lean |
1 |
7 |
['Ruben-VandeVelde', 'eric-wieser', 'gilesgshaw', 'github-actions', 'kim-em', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
327-46730 10 months ago |
330-32259 330 days ago |
0-35689 9 hours |
| 19582 |
yu-yama author:yu-yama |
feat(GroupExtension/Abelian): define `OfMulDistribMulAction.equivH2` |
Mainly defines:
- `structure GroupExtension.OfMulDistribMulAction N G [MulDistribMulAction G N]`: group extensions of `G` by `N` where the multiplicative action of `G` on `N` is the conjugation
- `structure GroupExtension.OfMulDistribMulActionWithSection N G [MulDistribMulAction G N]`: group extensions with specific choices of sections
- `def GroupExtension.OfMulDistribMulAction.equivH2`: a bijection between the equivalence classes of group extensions and $H^2 (G, N)$
---
- [x] depends on: #20802 (split PR: contains changes to the `Defs` file)
- [x] depends on: #20998 (split PR: mainly adds the `Basic` file)
- [ ] depends on: #26670 (split PR: adds the first part of the `Abelian` file)
Here is a relevant TODO in Mathlib:
https://github.com/leanprover-community/mathlib4/blob/4e9fa40d7c480937e09cd6e47a591bd6f3b8be42/Mathlib/RepresentationTheory/GroupCohomology/LowDegree.lean#L46-L48
I would appreciate your comments.
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
blocked-by-other-PR
new-contributor
label:t-algebra$ |
750/14 |
Mathlib.lean,Mathlib/GroupTheory/GroupExtension/Abelian.lean,Mathlib/GroupTheory/GroupExtension/Defs.lean,docs/references.bib |
4 |
5 |
['YaelDillies', 'erdOne', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
324-83238 10 months ago |
547-53797 547 days ago |
43-22586 43 days |
| 27403 |
MoritzBeroRoos author:MoritzBeroRoos |
fix: replace probably erroneous usage of ⬝ (with old \cdot) by · (with \centerdot) |
Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot).
Currently the abbreviations \cdot and \centerdot resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for center..).
This pr replaces instances of ⬝ where · was probably meant.
All of the replacement is in comments, except for the file bench_summary.lean which is used for priting the github benchmark results. Since this file is about scientific notation of numbers, sure · was meant to be used, not a rectangle.
[Related](https://github.com/leanprover-community/mathlib4/pull/27399)
---
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If you are moving or deleting declarations, please include these lines at the bottom of the commit message
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
new-contributor
|
195/195 |
Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/DirectSum/Idempotents.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/DivisionPolynomial/Basic.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/Normed/Unbundled/InvariantExtension.lean,Mathlib/Analysis/SpecialFunctions/Complex/CircleAddChar.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Data/Matrix/Block.lean,Mathlib/Data/Matrix/ConjTranspose.lean,Mathlib/Data/Matrix/Hadamard.lean,Mathlib/Data/Matrix/Mul.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matrix/Reflection.lean,Mathlib/Data/Matrix/RowCol.lean,Mathlib/Data/Matrix/Vec.lean,Mathlib/FieldTheory/PurelyInseparable/PerfectClosure.lean,Mathlib/Geometry/Manifold/GroupLieAlgebra.lean,Mathlib/GroupTheory/Coxeter/Matrix.lean,Mathlib/LinearAlgebra/CrossProduct.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/DotProduct.lean,Mathlib/LinearAlgebra/Matrix/Nondegenerate.lean,Mathlib/LinearAlgebra/Matrix/Orthogonal.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/LinearAlgebra/Matrix/SchurComplement.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Trace.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/PerfectPairing/Matrix.lean,Mathlib/LinearAlgebra/Projectivization/Constructions.lean,Mathlib/NumberTheory/NumberField/ProductFormula.lean,Mathlib/NumberTheory/SiegelsLemma.lean,Mathlib/RingTheory/DividedPowers/SubDPIdeal.lean,Mathlib/SetTheory/Ordinal/Veblen.lean,Mathlib/Topology/Algebra/Module/Equiv.lean,Mathlib/Topology/Homeomorph/Lemmas.lean,Mathlib/Topology/Instances/Matrix.lean,scripts/bench_summary.lean |
49 |
5 |
['eric-wieser', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant'] |
nobody |
323-47819 10 months ago |
346-23741 346 days ago |
7-54661 7 days |
| 27399 |
MoritzBeroRoos author:MoritzBeroRoos |
chore: replace every usage of ⬝ᵥ (with old \cdot) by ·ᵥ (with \centerdot) |
Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot).
Currently the abbreviations `\cdot` and `\centerdot` resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for `center`..):
- `\cdot` gives ⬝ [U+2B1D](https://www.compart.com/en/unicode/U+2B1D) "Black Very Small Square"
- `\centerdot` gives · [U+00B7](https://www.compart.com/en/unicode/U+00B7) "Middle Dot"
Mathlib mostly uses the `\centerdot` variant, except for the dotProduct notation and some probably unsuspecting people wanting \centerdot but getting \cdot in their comments and 6 uses of a notation using the raw `\cdot` without any subscript at `Mathlib\Topology\Homotopy\Product.lean`.
This PR replaces the dot product `⬝ᵥ` with its `\centerdot` counterpart `·ᵥ`. The related PR [here](https://github.com/leanprover/vscode-lean4/pull/639) can then overwrite the `\cdot` abbreviation, to produce the same symbol as the `centerdot` abbreviation does.
---
[](https://gitpod.io/from-referrer/)
|
merge-conflict
new-contributor
|
133/133 |
Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Data/Matrix/Block.lean,Mathlib/Data/Matrix/ConjTranspose.lean,Mathlib/Data/Matrix/Hadamard.lean,Mathlib/Data/Matrix/Mul.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matrix/Reflection.lean,Mathlib/Data/Matrix/RowCol.lean,Mathlib/Data/Matrix/Vec.lean,Mathlib/LinearAlgebra/CrossProduct.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/DotProduct.lean,Mathlib/LinearAlgebra/Matrix/Nondegenerate.lean,Mathlib/LinearAlgebra/Matrix/Orthogonal.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/LinearAlgebra/Matrix/SchurComplement.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Trace.lean,Mathlib/LinearAlgebra/PerfectPairing/Matrix.lean,Mathlib/LinearAlgebra/Projectivization/Constructions.lean,Mathlib/Topology/Instances/Matrix.lean |
25 |
6 |
['MoritzBeroRoos', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] |
nobody |
323-9651 10 months ago |
346-23742 346 days ago |
7-62439 7 days |
| 27479 |
iu-isgood author:iu-isgood |
feat: Abel's Binomial Theorem |
We have formalized Abel's Binomial Theorem as part of an REU project. There are a few remaining sorrys, but we will finish them soon. I will edit this PR message later according to community rules.
---
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[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-data
new-contributor
|
326/0 |
Mathlib/Data/Nat/Choose/AbelBinomial.lean |
1 |
28 |
['ElifUskuplu', 'FrankieNC', 'github-actions', 'iu-isgood'] |
nobody |
323-9412 10 months ago |
352-7109 352 days ago |
0-237 3 minutes |
| 26462 |
PSchwahn author:PSchwahn |
feat(LinearAlgebra/Projection): add results about inverse of `Submodule.prodEquivOfIsCompl` |
Add two theorems `Submodule.prodEquivOfIsCompl_symm_apply` and `Submodule.prodEquivOfIsCompl_symm_add`, which are API for `Submodule.prodEquivOfIsCompl`.
We believe these theorems are useful; for example, we have used their statements in a [classification formalization project](https://github.com/LieLean/LowDimSolvClassification).
Co-authored by:
- [Viviana del Barco](https://github.com/vdelbarc)
- [Gustavo Infanti](https://github.com/GuQOliveira)
- [Exequiel Rivas](https://github.com/erivas)
---
I am not sure whether the `prodEquivOfIsCompl_symm_apply` theorem should be tagged with `@[simp]`; this might lead to confluence issues. Opinions are welcome!
<!-- The text above the `---` will become the commit message when your
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[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-algebra
new-contributor
label:t-algebra$ |
10/0 |
Mathlib/LinearAlgebra/Projection.lean |
1 |
7 |
['PSchwahn', 'github-actions', 'joelriou', 'kckennylau'] |
joelriou assignee:joelriou |
306-67180 10 months ago |
307-11883 307 days ago |
73-43082 73 days |
| 28623 |
gilesgshaw author:gilesgshaw |
feat(Logic/Basic): minor additions and simplification of proofs |
Add new theorems and simplify proofs.
Specifically, we add the family of related theorems `apply_dite_iff_exists`, `apply_dite_iff_forall`, `apply_ite_iff_and` and `apply_ite_iff_or`.
For each other 'family' of theorems in the file that is analogous to the above, we do the following
- Simplify proofs where possible, e.g. by appealing to the new theorems
- Complete the family, if any of the corresponding four are missing
- Rename to ensure consistency with the above pattern
---
|
merge-conflict
t-logic
new-contributor
|
83/55 |
Archive/Examples/IfNormalization/Result.lean,Archive/Examples/IfNormalization/WithoutAesop.lean,Mathlib/Algebra/ContinuedFractions/Computation/Translations.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Notation/Indicator.lean,Mathlib/LinearAlgebra/Matrix/Rank.lean,Mathlib/Logic/Basic.lean,Mathlib/MeasureTheory/Measure/WithDensity.lean,Mathlib/SetTheory/Ordinal/Notation.lean |
9 |
12 |
['eric-wieser', 'gilesgshaw', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127'] |
awainverse assignee:awainverse |
306-15682 10 months ago |
306-15683 306 days ago |
10-61840 10 days |
| 29588 |
Periecle author:Periecle |
feat(Analysis/Complex/Residue): Implement residue theory for complex functions at isolated singularities |
# Add basic residue theory for complex functions
This PR introduces the residue theory implementation in mathlib.
## Main additions
- **`HasIsolatedSingularityAt f c`**: Predicate for functions with isolated singularities at point `c`
- **`residue f c hf`**: The residue of `f` at isolated singularity `c`, defined via circle integrals
- **Radius independence**: `residue_eq_two_pi_I_inv_smul_circleIntegral` - residue equals normalized circle integral for any valid radius
- **Holomorphic residues**: `residue_of_holomorphic` - functions holomorphic in a neighborhood have zero residue
- **Simple pole formula**: `residue_simple_pole` - for `f(z) = (z-c)⁻¹ * g(z)`, residue equals `g(c)`
## Implementation notes
- Builds on existing circle integral infrastructure in `CauchyIntegral.lean`
- Uses `Classical.choose` to extract witness radius from isolated singularity condition
- Comprehensive documentation with mathematical context and examples
- Establishes foundation for residue theorem, argument principle, and other applications
## Examples included
- `residue(1/z, 0) = 1` (canonical simple pole)
- Radius independence demonstration
- Zero residues for holomorphic functions
This provides the essential building blocks for complex analysis and first step to formalize residue theory. |
awaiting-author
t-analysis
new-contributor
|
383/0 |
Mathlib/Analysis/Complex/Residue/Basic.lean |
1 |
17 |
['Periecle', 'github-actions', 'hrmacbeth', 'llllvvuu', 'loefflerd'] |
nobody |
291-14882 9 months ago |
303-19245 303 days ago |
0-1498 24 minutes |
| 26178 |
ppls-nd-prs author:ppls-nd-prs |
feat(CategoryTheory/Limits): Fubini for products |
We show that the product of products is a product indexed by the sigma type.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-category-theory
new-contributor
|
17/0 |
Mathlib/CategoryTheory/Limits/Shapes/Products.lean |
1 |
6 |
['chrisflav', 'github-actions', 'leanprover-community-bot-assistant', 'ppls-nd-prs', 'robin-carlier'] |
nobody |
286-29926 9 months ago |
387-39326 387 days ago |
0-47289 13 hours |
| 28630 |
Antidite author:Antidite |
feat(Archive/Imo): right isosceles configuration in the complex plane |
feat(Archive/Imo): right isosceles configuration in the complex plane
This adds `Archive/Imo/Imo1975Q3.lean`, formalizing a triangle configuration
with points A=0, B=1, C=z and auxiliary points R, P, Q built via complex
rotations and sine-based scale factors.
Main results:
* `angle_and_distance`: ∠QRP = π/2 and dist Q R = dist R P.
* Key identity `QRP_rot90`: (Q z).z − R.z = e^{iπ/2} · ((P z).z − R.z).
Design/Style:
* Minimal imports; module docstring; semantic lemma names; all definitions and
theorems live under the namespace `IMO.TriangleConfig`.
Moves:
- (none)
Deletions:
- (none)
---
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[](https://gitpod.io/from-referrer/)
|
IMO
awaiting-author
new-contributor
|
196/0 |
Archive.lean,Archive/Imo/Imo1975Q3.lean |
2 |
36 |
['Antidite', 'LLaurance', 'github-actions', 'jsm28'] |
jsm28 assignee:jsm28 |
280-82072 9 months ago |
280-82072 280 days ago |
46-26438 46 days |
| 16773 |
arulandu author:arulandu |
feat(Probability/Distributions): formalize Beta distribution |
Formalize Beta distribution, using Gamma distribution as a reference. Added real-valued beta wrapper, in the manner of gamma. Thanks to @EtienneC30 for help with casting real <-> complex.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
new-contributor
t-measure-probability
|
286/1 |
Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Beta.lean,Mathlib/Probability/Distributions/Beta.lean |
3 |
50 |
['EtienneC30', 'arulandu', 'github-actions', 'mathlib4-merge-conflict-bot', 'vihdzp'] |
arulandu assignee:arulandu |
275-4977 9 months ago |
665-32526 665 days ago |
0-22021 6 hours |
| 30460 |
janithamalith author:janithamalith |
feat(Nat): add lemma nat_card_orbit_mul_card_stabilizer_eq_card_group |
Added a lemma `nat_card_orbit_mul_card_stabilizer_eq_card_group` which is the Nat.card version of MulAction.card_orbit_mul_card_stabilizer_eq_card_group
---
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|
awaiting-author
t-group-theory
new-contributor
|
6/0 |
Mathlib/GroupTheory/GroupAction/CardCommute.lean |
1 |
17 |
['github-actions', 'kckennylau', 'plp127', 'tb65536'] |
tb65536 assignee:tb65536 |
265-15227 8 months ago |
265-15227 265 days ago |
8-8414 8 days |
| 25225 |
xcloudyunx author:xcloudyunx |
feat(Combinatorics/SimpleGraph): Eulerian walk in connected graph contains all vertices |
---
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[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-combinatorics
new-contributor
|
16/0 |
Mathlib/Combinatorics/SimpleGraph/Trails.lean |
1 |
6 |
['IvanRenison', 'github-actions', 'vlad902'] |
kmill assignee:kmill |
263-65159 8 months ago |
263-65159 263 days ago |
148-3338 148 days |
| 30828 |
DeVilhena-Paulo author:DeVilhena-Paulo |
feat: implementation of `Finmap.merge` |
The main contribution of this pull request is the implementation of a `merge` function for finite maps (`Finmap`). The construction relies on the definition of a `merge` function for association lists (`AList`).
There is also a side (unrelated) contribution on `Mathlib/Data/List/Permutation.lean`: the addition of a theorem about the permutation of a list with a head element (that is, a list of the form `a :: l`).
---
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|
t-data
new-contributor
|
449/3 |
Mathlib/Data/Finmap.lean,Mathlib/Data/List/AList.lean,Mathlib/Data/List/Permutation.lean,Mathlib/Data/List/Sigma.lean |
4 |
1 |
['github-actions'] |
nobody |
262-2191 8 months ago |
262-2259 262 days ago |
0-83 1 minute |
| 28676 |
sun123zxy author:sun123zxy |
feat(NumberTheory/ArithmeticFunction): wrap `Nat.totient` as an `ArithmeticFunction` |
This wraps the Euler's totient function `Nat.totient` into a new `ArithmeticFunction` `ϕ`, with some basic identities such as `ϕ * ζ = id` and `μ * id = ϕ.`
---
We use the notation `ϕ` to distinguish from `Nat.totient`'s notation `φ`, however this might be controversial. Suggestions are welcome!
[](https://gitpod.io/from-referrer/)
|
t-number-theory
new-contributor
large-import
merge-conflict
awaiting-author
|
45/5 |
Mathlib/NumberTheory/ArithmeticFunction.lean |
1 |
19 |
['MichaelStollBayreuth', 'SnirBroshi', 'b-mehta', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'riccardobrasca', 'sun123zxy'] |
MichaelStollBayreuth assignee:MichaelStollBayreuth |
257-34630 8 months ago |
273-9306 273 days ago |
47-58551 47 days |
| 30158 |
nicolaviolette author:nicolaviolette |
feat: combinatorics simplegraph basic |
---
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[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-combinatorics
new-contributor
|
9/4 |
Mathlib/Combinatorics/SimpleGraph/Basic.lean |
1 |
3 |
['b-mehta', 'github-actions'] |
b-mehta assignee:b-mehta |
250-45411 8 months ago |
250-45411 250 days ago |
31-69826 31 days |
| 26901 |
5hv5hvnk author:5hv5hvnk |
feat: a simproc version of `compute_degree` |
Wrap `compute_degree` in a simproc for use by simp.
Closes #22219.
--- |
awaiting-CI
new-contributor
merge-conflict
awaiting-author
t-meta
|
198/0 |
Mathlib.lean,Mathlib/Tactic/Simproc/PolynomialDegree.lean,MathlibTest/polynomial_degree_simproc.lean |
3 |
19 |
['5hv5hvnk', 'YaelDillies', 'adomani', 'github-actions', 'mathlib4-merge-conflict-bot'] |
nobody |
248-5679 8 months ago |
369-7049 369 days ago |
0-267 4 minutes |
| 30150 |
imbrem author:imbrem |
feat(CategoryTheory/Monoidal): to_additive for MonoidalCategory |
Add `AddMonoidalCategory`, the additive version of `MonoidalCategory`.
To get this to work, I needed to _remove_ the `to_additive` attributes in `Discrete.lean`, since existing code relies on the `AddMonoid M → MonoidalCategory M` instance. For now, we simply implement the additive variants by hand instead.
---
As discussed in #28718; I added an `AddMonoidalCategory` struct and tagged `MonoidalCategory` with `to_additive`, along with the lemmas in `Category.lean`.
I think this is the right approach, since under this framework the "correct" additive version of `Discrete.lean` would be mapping an `AddMonoid` to an `AddMonoidalCategory`.
Next steps would be to:
- Make `monoidal_coherence` and `coherence` support `AddMonoidalCategory`
- Add `CocartesianMonoidalCategory` extending `AddMonoidalCategory`
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[](https://gitpod.io/from-referrer/)
|
t-category-theory
large-import
new-contributor
merge-conflict
awaiting-zulip
t-meta
|
444/125 |
Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Tactic/ToAdditive/GuessName.lean |
3 |
22 |
['JovanGerb', 'YaelDillies', 'github-actions', 'imbrem', 'mathlib4-merge-conflict-bot'] |
nobody |
241-55070 7 months ago |
281-33736 281 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 |
236-72202 7 months ago |
656-13190 656 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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- [x] depends on: #15647 [Data.FinEnum.Option unchanged since then]
[](https://gitpod.io/from-referrer/)
|
new-contributor
t-computability
merge-conflict
awaiting-author
awaiting-zulip
|
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 |
236-2043 7 months ago |
581-51973 581 days ago |
23-54870 23 days |
| 5919 |
MithicSpirit author:MithicSpirit |
feat: implement orthogonality for AffineSubspace |
Define `AffineSubspace.orthogonal` and `AffineSubspace.IsOrtho`, as well as develop an API emulating that of `Submodule.orthogonal` and `Submodule.IsOrtho`, respectively. Additionally, provide some relevant lemmas exclusive to affine subspaces, which are mostly to do with the relationship between orthogonality and `AffineSubspace.Parallel`.
Closes #5539
---
Still WIP as I need to add more docstrings as well as notations for the new definitions.
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[](https://gitpod.io/from-referrer/)
|
WIP
new-contributor
merge-conflict
help-wanted
t-analysis
|
287/0 |
Mathlib.lean,Mathlib/Analysis/InnerProductSpace/AffineSubspace.lean |
2 |
7 |
['MithicSpirit', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] |
MithicSpirit assignee:MithicSpirit |
235-39900 7 months ago |
918-64795 918 days ago |
0-433 7 minutes |
| 13442 |
dignissimus author:dignissimus |
feat: mabel tactic for multiplicative abelian groups |
Mabel tactic for multiplicative abelian groups (#10361)
---
[](https://gitpod.io/from-referrer/)
|
new-contributor
merge-conflict
modifies-tactic-syntax
awaiting-author
help-wanted
t-meta
|
439/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MAbel.lean,MathlibTest/mabel.lean |
4 |
11 |
['BoltonBailey', 'dignissimus', 'github-actions', 'joneugster', 'kbuzzard', 'mathlib4-merge-conflict-bot'] |
joneugster assignee:joneugster |
235-39636 7 months ago |
685-31722 685 days ago |
0-16 16 seconds |
| 15224 |
AnthonyBordg author:AnthonyBordg |
feat(CategoryTheory/Sites): covering families and their associated Grothendieck topology |
Define covering families on a category and their associated Grothendieck topology by using the API for `Coverage`.
Give an explicit characterization of the covering sieves of the said topology.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-category-theory
new-contributor
|
112/0 |
Mathlib.lean,Mathlib/CategoryTheory/Sites/CoveringFamilies.lean |
2 |
21 |
['AnthonyBordg', 'adamtopaz', 'dagurtomas', 'github-actions', 'joelriou', 'mathlib4-merge-conflict-bot'] |
nobody |
235-39505 7 months ago |
711-5736 711 days ago |
1-48443 1 day |
| 20648 |
anthonyde author:anthonyde |
feat: formalize regular expression -> εNFA |
The file `Computability/RegularExpressionsToEpsilonNFA.lean` contains a formal definition of Thompson's method for constructing an `εNFA` from a `RegularExpression` and a proof of its correctness.
---
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- [x] depends on: #20644
- [x] depends on: #20645
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-computability
awaiting-zulip
new-contributor
|
490/0 |
Mathlib.lean,Mathlib/Computability/RegularExpressionsToEpsilonNFA.lean,docs/references.bib |
3 |
7 |
['anthonyde', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'meithecatte', 'qawbecrdtey'] |
nobody |
235-39211 7 months ago |
432-72140 432 days ago |
75-77754 75 days |
| 21903 |
yhtq author:yhtq |
feat: add from/toList between `FreeSemigroup` and `List` with relative theorems |
Add from/toList between `FreeSemigroup` and `List` with relative theorems, as well as an incidental definition of lexicographic order on `FreeSemigroup`.
---
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[](https://gitpod.io/from-referrer/)
|
t-algebra
new-contributor
awaiting-CI
large-import
merge-conflict
label:t-algebra$ |
169/0 |
Mathlib/Algebra/Free.lean |
1 |
12 |
['YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot'] |
nobody |
235-39071 7 months ago |
462-23026 462 days ago |
50-9299 50 days |
| 22159 |
shetzl author:shetzl |
feat: add definition of pushdown automata |
Add the definition of pushdown automata and their two acceptance conditions: acceptance based on empty stack and acceptance based on final state.
Co-authored-by: Tobias Leichtfried <tobias.leichtfried@tuwien.ac.at>
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-computability
awaiting-author
new-contributor
|
70/0 |
Mathlib.lean,Mathlib/Computability/PDA.lean |
2 |
35 |
['YaelDillies', 'github-actions', 'madvorak', 'mathlib4-merge-conflict-bot', 'shetzl'] |
nobody |
235-39065 7 months ago |
482-33078 482 days ago |
20-81248 20 days |
| 22302 |
658060 author:658060 |
feat: add `CategoryTheory.Topos.Power` |
This is a continuation of #21281 with the end goal of defining topoi in Mathlib. It introduces the notion of a power object in a category with a subobject classifier, which is a special case of an internal hom.
The definition `HasPowerObjects C` contained in this PR is all that remains before `IsTopos C` can be defined.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-category-theory
new-contributor
|
312/0 |
Mathlib.lean,Mathlib/CategoryTheory/Topos/Power.lean |
2 |
3 |
['github-actions', 'joelriou', 'mathlib4-merge-conflict-bot'] |
b-mehta assignee:b-mehta |
235-39056 7 months ago |
501-73058 501 days ago |
0-1528 25 minutes |
| 22790 |
mhk119 author:mhk119 |
feat: Extend `taylor_mean_remainder_lagrange` to `x < x_0` |
The `taylor_mean_remainder_lagrange` theorem has the assumption that $x_0 < x$. In many applications, we need $x < x_0$ and one cannot use the current version to obtain this (see [zulip](https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Taylor's.20theorem)). This PR introduces a set of theorems that push negations through Taylor expansions so that one can extend `taylor_mean_remainder_lagrange` to the case when $x < x_0$. These theorems should also be useful elsewhere since they are quite general. |
merge-conflict
awaiting-author
t-analysis
new-contributor
|
111/1 |
Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Lemmas.lean,Mathlib/Analysis/Calculus/Taylor.lean |
3 |
13 |
['Paul-Lez', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'mhk119'] |
nobody |
235-39043 7 months ago |
463-54160 463 days ago |
23-14843 23 days |
| 25739 |
literandltx author:literandltx |
feat(NumberTheory/LegendreSymbol): Add sqrt‐of‐residue theorems for p=4k+3 and p=8k+5 |
Add a new file `QuadraticResidueRoots.lean` under `Mathlib/NumberTheory/LegendreSymbol/` that proves two explicit “square-root of quadratic residue” theorems for primes of the specific form.
- **`exists_sqrt_of_residue_mod4_eq3`** for primes `p = 4*k + 3`
- **`exists_sqrt_of_residue_mod8_eq5`** for primes `p = 8*k + 5`
It also introduces the helper lemmas `euler_criterion_traditional` and `legendreSym.at_two_mod8_eq_5`. Import lines in `Mathlib.lean` and `Mathlib/NumberTheory/LegendreSymbol/Basic.lean` have been updated accordingly.
|
merge-conflict
awaiting-author
t-number-theory
new-contributor
|
217/0 |
Mathlib.lean,Mathlib/NumberTheory/LegendreSymbol/Basic.lean,Mathlib/NumberTheory/LegendreSymbol/QuadraticReciprocity.lean,Mathlib/NumberTheory/LegendreSymbol/QuadraticResidueRoots.lean |
4 |
3 |
['github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] |
literandltx assignee:literandltx |
235-38741 7 months ago |
377-62304 377 days ago |
17-63153 17 days |
| 26594 |
metakunt author:metakunt |
feat(Algebra/Polynomial/ZMod): Add Polynomial.equiv_of_nat_of_polynomial_zmod |
This adds an explicit bijection between the naturals and $$\mathbb{Z}/n\mathbb{Z}[X]$$ in a canonical way.
---
I feel that some API is missing to make the theorem shorter, I have no idea what lemmas to extract though.
Also I don't know when to use spaces and when not, so I did it best effort.
|
merge-conflict
awaiting-author
t-algebra
new-contributor
label:t-algebra$ |
465/0 |
Mathlib.lean,Mathlib/Algebra/Polynomial/ZMod.lean |
2 |
3 |
['Ruben-VandeVelde', 'github-actions', 'mathlib4-merge-conflict-bot'] |
nobody |
235-38381 7 months ago |
350-82139 350 days ago |
25-5689 25 days |
| 26757 |
fweth author:fweth |
feat(CategoryTheory/Topos): define elementary topos |
This commit begins the formalization of the notion of an *elementary topos*, following the definition in \[Mac Lane & Moerdijk, *Sheaves in Geometry and Logic* (1992), Ch. IV, Section 1]. It introduces the file `Mathlib/CategoryTheory/Topos/Basic.lean`, which currently includes:
* The definition of an elementary topos.
* Proof that the power object map is a functor
* Theorem about pullbacks of characterstic maps
Subobject classifiers, which are used in the definition, have already been defined in `CategoryTheory/Topos/Classifier.lean`
Work in progress: further formalization of the section is planned.
Questions:
* Should the definition of power objects be separated into its own file/module, perhaps under `CategoryTheory/Topos/PowerObject.lean`?
* Is the notation `P` / `P_morph` / `P_functor` for the power object functor on objects / morphisms / total acceptable?
* Should the comments and docstrings rather use the notation from the book, where `g ∘ f` denotes arrow composition from righ to left, or the Lean variant `f ≫ g`?
Klaus Gy klausgy@gmail.com
---
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|
merge-conflict
awaiting-author
t-category-theory
new-contributor
|
401/66 |
Mathlib.lean,Mathlib/CategoryTheory/Closed/PowerObjects.lean,Mathlib/CategoryTheory/Limits/Shapes/BinaryProducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Equalizers.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/CommSq.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Equalizer.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Basic.lean,Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/CategoryTheory/Topos/Classifier.lean |
9 |
17 |
['fweth', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] |
joelriou assignee:joelriou |
235-38376 7 months ago |
264-27186 264 days ago |
62-9859 62 days |
| 27155 |
Pjotr5 author:Pjotr5 |
feat: Shearer's bound on the independence number of triangle free graphs |
I added the file IndependenceNumber.lean to the Mathlib.Combinatorics.SimpleGraph.Triangle folder. It contains a proof of a theorem by Shearer on the independence number of triangle-free graphs . I was told this might be useful to add to Mathlib a Zullip thread linked [here](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Convexity.20of.20a.20specific.20function/with/510469526).
I tried to comply as much as I could with the Mathlib style guide, but I realise that there is probably still a significant amount of editing to be done. For one thing: there are probably some lemmas and theorems in there that might be better suited in other files, but since this is my first PR I though I would all put it in one file before starting to edit a bunch of files.
I was also advised to split up the file into multiple smaller PRs, but since everything is basically serving this one proof I could not really find a natural way to do that.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-combinatorics
new-contributor
|
1266/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/IndependenceNumber.lean |
2 |
10 |
['Pjotr5', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] |
nobody |
235-38339 7 months ago |
362-25948 362 days ago |
0-287 4 minutes |
| 27753 |
YunkaiZhang233 author:YunkaiZhang233 |
feat(CategoryTheory): implemented proofs for factorisation categories being equivalent to iterated comma categories in two ways |
---
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Completed one of the tasks in TODOs, shown and implemented the details for (X/C)/f ≌ Factorisation f ≌ f/(C/Y).
This is migrated from my previous PR #22390
[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-category-theory
new-contributor
|
70/1 |
Mathlib/CategoryTheory/Category/Factorisation.lean |
1 |
13 |
['YunkaiZhang233', 'b-mehta', 'github-actions', 'mathlib4-merge-conflict-bot', 'robin-carlier'] |
nobody |
235-38184 7 months ago |
346-9347 346 days ago |
0-3448 57 minutes |
| 27850 |
fyqing author:fyqing |
feat: 0-dimensional manifolds are discrete and countable |
This is the converse direction of the classification of 0-dimensional manifolds. The other direction was shown in #22105.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-differential-geometry
new-contributor
|
80/0 |
Mathlib.lean,Mathlib/Geometry/Manifold/ZeroDim.lean |
2 |
14 |
['fyqing', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'tb65536'] |
grunweg assignee:grunweg |
235-38182 7 months ago |
344-70409 344 days ago |
0-5814 1 hour |
| 28125 |
nonisomorphiclinearmap author:nonisomorphiclinearmap |
feat(Combinatorics): basic definition of simplicial complexes |
This PR introduces the basic definition of a finite (abstract) simplicial complex, located in Mathlib/Combinatorics/SimplicialComplex/Basic.lean.
---
This is our first contribution to mathlib. This work was done as part of the Fields Institute Summer Undergraduate Program on formalization in topological combinatorics. Eventually, we aim to formalize Lovasz's proof of the Kneser Conjecture and this is a small stepping stone in that direction. Some other commits will shortly depend on this one.
We would like to acknowledge the Fields Institute for Research in Mathematical Sciences for their sponsorship. We would also like to thank our supervisors, Professor Chris Kapulkin and Mr. Daniel Carranza, for their guidance and support throughout this project. We would also like to thank our group members Tom Lindquist and Quang Minh Nguyen for our fruitful discussions. |
merge-conflict
t-combinatorics
new-contributor
|
374/0 |
Mathlib.lean,Mathlib/Combinatorics/SimplicialComplex/Basic.lean,Mathlib/Combinatorics/SimplicialComplex/Category.lean,Mathlib/Combinatorics/SimplicialComplex/FacePoset.lean,Mathlib/Combinatorics/SimplicialComplex/Hom.lean |
5 |
2 |
['github-actions', 'mathlib4-merge-conflict-bot'] |
awainverse assignee:awainverse |
235-38050 7 months ago |
235-38051 235 days ago |
99-62977 99 days |
| 28530 |
nonisomorphiclinearmap author:nonisomorphiclinearmap |
feat(Combinatorics/SimplicialComplex/Topology): add standard simplices and geometric realisation (colimit + functoriality) |
Introduce the standard simplex on a finite vertex set and build the geometric realisation |X| of a simplicial complex. Prove that |X| is the colimit of the face diagram δ_X : X.faces ⥤ TopCat, and define the induced map on realisations |φ| : |X| ⟶ |Y| for a simplicial map φ. Show that the abstract map from colimit functoriality agrees with the concrete push-forward of barycentric coordinates. Package these into a functor SimplicialComplexCat ⥤ TopCat.
---
This is our first contribution to mathlib. This work was done as part of the Fields Institute Summer Undergraduate Program on formalization in topological combinatorics. Eventually, we aim to formalize Lovasz's proof of the Kneser Conjecture and this lays the groundwork to do this.
We would like to acknowledge the Fields Institute for Research in Mathematical Sciences for their sponsorship. We would also like to thank our supervisors, Professor Chris Kapulkin and Mr. Daniel Carranza, for their guidance and support throughout this project. I would also like to thank our group members Sebastian Kumar, Tom Lindquist and Quang Minh Nguyen for our fruitful discussions.
- [ ] depends on: #28125 |
merge-conflict
blocked-by-other-PR
t-combinatorics
new-contributor
|
1826/0 |
Mathlib.lean,Mathlib/Combinatorics/SimplicialComplex/Basic.lean,Mathlib/Combinatorics/SimplicialComplex/Category.lean,Mathlib/Combinatorics/SimplicialComplex/FacePoset.lean,Mathlib/Combinatorics/SimplicialComplex/Hom.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/GeomReal/Basic.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/GeomReal/Colimit.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/GeomReal/Diagram.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/GeomReal/Functor.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/GeomReal/Map.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/Simplex.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/SimplexMap.lean |
12 |
3 |
['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
235-38036 7 months ago |
329-78264 329 days ago |
0-591 9 minutes |
| 28871 |
JaafarTanoukhi author:JaafarTanoukhi |
feat(Combinatorics/Digraph): Tournaments |
Define orientations and tournaments. Related to #26771.
Co-authored-by: Rida Hamadani <mridahamadani@gmail.com>
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-combinatorics
new-contributor
|
62/0 |
Mathlib.lean,Mathlib/Combinatorics/Digraph/Orientation.lean,Mathlib/Combinatorics/Digraph/Tournament.lean |
3 |
6 |
['JaafarTanoukhi', 'Rida-Hamadani', 'SnirBroshi', 'github-actions', 'mathlib4-merge-conflict-bot'] |
kmill assignee:kmill |
235-37897 7 months ago |
235-37898 235 days ago |
71-37436 71 days |
| 29947 |
JaafarTanoukhi author:JaafarTanoukhi |
feat(Combinatorics/Digraph): Maps |
Ported `SimpleGraph/Maps.lean` to `Digraph/Maps.lean` for future PRs related to issue #[26771](https://github.com/leanprover-community/mathlib4/issues/26771)
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-combinatorics
new-contributor
|
476/0 |
Mathlib.lean,Mathlib/Combinatorics/Digraph/Maps.lean |
2 |
2 |
['github-actions', 'mathlib4-merge-conflict-bot'] |
awainverse assignee:awainverse |
235-37263 7 months ago |
235-37264 235 days ago |
54-85998 54 days |
| 11021 |
jstoobysmith author:jstoobysmith |
feat(AlgebraicTopology): add join of augmented SSets |
This pull-request adds the definition of the join of augmented SSets defined as contravariant functors from `WithInitial SimplexCategory` to `Type u`. In addition it shows that the join of two standard augmented SSets is again an augmented SSets.
From this the definition of the join of simplicial sets should follow easily.
To aid the above theory, an api for `WithInitial SimplexCategory` has been created, with the notion of the `join` and `split` (forming a sort of inverse to join) of objects in this category are defined.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-algebraic-topology
new-contributor
|
2137/1 |
.gitignore,Mathlib.lean,Mathlib/AlgebraicTopology/Join.lean,Mathlib/AlgebraicTopology/SimplexCategory.lean,Mathlib/AlgebraicTopology/SimplexCategoryWithInitial.lean,Mathlib/AlgebraicTopology/SimplicialSet.lean |
6 |
47 |
['github-actions', 'jcommelin'] |
nobody |
235-11111 7 months ago |
864-64956 864 days ago |
1-20227 1 day |
| 18626 |
hannahfechtner author:hannahfechtner |
feat: define Artin braid groups |
Define the Artin braid group on infinitely many strands. Includes a toGroup function which defines a function out of the braid group to any other group (given a function which satisfies the braid relations)
(more to come in this file; next up: Artin braid groups on finitely many strands)
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-algebra
new-contributor
label:t-algebra$ |
91/0 |
Mathlib.lean,Mathlib/GroupTheory/SpecificGroups/BraidGroup/Basic.lean |
2 |
22 |
['github-actions', 'hannahfechtner', 'jcommelin', 'joelriou'] |
nobody |
235-10958 7 months ago |
598-17837 598 days ago |
15-38343 15 days |
| 20029 |
FrederickPu author:FrederickPu |
feat(Tactic/simps): allow for Config attributes to be set directly |
Allow for Config attributes to be set directly when using initialize_simp_projection as per issue #19895
Basically modified initialize_simp_projection so that the user has the option of specifying a tuple of config option values.
Ex:
```
initialize_simp_projection MulEquiv (toFun → apply, invFun → symm_apply) (fullyApplied := false)
```
These config options are then converted into projections.
---
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|
merge-conflict
WIP
new-contributor
t-meta
|
34/4 |
Mathlib/Tactic/Simps/Basic.lean |
1 |
11 |
['FrederickPu', 'YaelDillies', 'fpvandoorn', 'github-actions', 'leanprover-community-bot-assistant'] |
nobody |
235-10895 7 months ago |
571-28144 571 days ago |
0-34081 9 hours |
| 21269 |
658060 author:658060 |
feat(CategoryTheory/Topos): basic definitions and results in topos theory |
This code contains basic definitions and results in topos theory, including the definition of a subobject classifier, power objects, and topoi. It is proved that every topos has exponential objects, i.e. "internal homs". The mathematical content follows chapter IV sections 1-2 of Mac Lane and Moerdijk's text "Sheaves in Geometry and Logic".
---
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- [x] depends on: #21281
[](https://gitpod.io/from-referrer/)
|
WIP
t-category-theory
new-contributor
merge-conflict
awaiting-author
|
1269/0 |
Mathlib.lean,Mathlib/CategoryTheory/Topos/Basic.lean,Mathlib/CategoryTheory/Topos/Classifier.lean,Mathlib/CategoryTheory/Topos/Exponentials.lean,Mathlib/CategoryTheory/Topos/Power.lean |
5 |
10 |
['658060', 'gio256', 'github-actions', 'joelriou', 'mathlib4-dependent-issues-bot'] |
nobody |
235-10868 7 months ago |
527-76082 527 days ago |
0-13879 3 hours |
| 23990 |
robertmaxton42 author:robertmaxton42 |
feat(Types.Colimits): Quot is functorial and colimitEquivQuot is natural |
Add `Functor.quotFunctor` to parallel `Functor.sectionsFunctor`, witnessing that `Quot` is functorial; add `colimNatIsoQuotFunctor` to parallel `limNatIsoSectionsFunctor`, witnessing that `colimitEquivQuot` is natural in the diagram $F$.
---
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|
merge-conflict
awaiting-author
t-category-theory
new-contributor
|
33/0 |
Mathlib/CategoryTheory/Limits/Types/Colimits.lean |
1 |
5 |
['github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'robertmaxton42'] |
nobody |
235-10751 7 months ago |
447-9686 447 days ago |
8-27116 8 days |
| 27991 |
sinianluoye author:sinianluoye |
feat(Rat): add Rat.den_eq_of_add_den_eq_one and its dependent lemmas |
```lean4
example {q r : ℚ} (h : (q + r).den = 1) : q.den = r.den := by
```
It is so simple, but I couldn't find it in current mathlib repo.
---
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|
awaiting-author
t-data
new-contributor
|
22/0 |
Mathlib/Data/Rat/Lemmas.lean |
1 |
33 |
['github-actions', 'kim-em', 'mathlib-bors', 'pechersky', 'sinianluoye', 'themathqueen'] |
pechersky assignee:pechersky |
235-10434 7 months ago |
263-83969 263 days ago |
74-62001 74 days |
| 28215 |
5hv5hvnk author:5hv5hvnk |
feat: strong and Weak connectivity for Digraphs |
strong and weak connectivity in Digraphs
---
Should resolve a part of issue #26771
Main additions in the PR:
1. Walks in Digraphs (Walk.lean)
- Basic walk structure with start and end vertices
- Support for walk operations: append, reverse, length
- Support functions: getVert, copy, support
2. Walk Decompositions (WalkDecomp.lean)
- takeUntil and dropUntil functions to split walks
- rotate operation for loop walks
- Theorems relating to walk decomposition properties
3. Subgraphs (subgraph.lean)
- Subgraph structure for digraphs
- Induced and spanning subgraph predicates
- Lattice structure (sup, inf, top, bot)
- Coercion to standalone digraphs
4. Paths (Paths.lean)
- Trail, Path, Circuit, Cycle definitions
- Path structure with no repeating vertices
- Theorems relating different path types
- Basic connectivity definitions (reachable, weakly/strongly connected)
5. Connectivity (Connected.lean)
- Reachability relations and properties
- Strong and weak connectivity definitions
- Connected component types:
- StronglyConnectedComponent
- WeaklyConnectedComponent
- ConnectedComponent
- Component properties and equivalence relations
-->
[](https://gitpod.io/from-referrer/)
|
WIP
new-contributor
merge-conflict
awaiting-author
t-combinatorics
|
1266/0 |
Mathlib.lean,Mathlib/Combinatorics/Digraph/Connected.lean,Mathlib/Combinatorics/Digraph/Paths.lean,Mathlib/Combinatorics/Digraph/Subgraph.lean,Mathlib/Combinatorics/Digraph/Walk.lean,Mathlib/Combinatorics/Digraph/WalkDecomp.lean |
6 |
4 |
['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] |
nobody |
235-10413 7 months ago |
335-49480 335 days ago |
0-454 7 minutes |
| 29574 |
JarodAlper author:JarodAlper |
feat: regular local rings are domains |
We have added three new files in Mathlib/RingTheory/LocalRing
* EmbeddingDimension.lean
* LocalRingDimension.lean
* RegularLocalRings.lean
We have added two lemmas and an instance in Mathlib/RingTheory/LocalRing/RingHom/Basic.lean
This work was done by Jarod Alper and Brian Nugent.
---
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|
merge-conflict
t-ring-theory
new-contributor
|
910/3 |
Mathlib.lean,Mathlib/RingTheory/LocalRing/EmbeddingDimension.lean,Mathlib/RingTheory/LocalRing/LocalRingDimension.lean,Mathlib/RingTheory/LocalRing/RegularLocalRings.lean,Mathlib/RingTheory/LocalRing/RingHom/Basic.lean,lake-manifest.json |
6 |
2 |
['github-actions', 'mathlib4-merge-conflict-bot'] |
nobody |
235-10302 7 months ago |
302-11372 302 days ago |
0-1063 17 minutes |
| 28718 |
imbrem author:imbrem |
feat: class for chosen finite coproducts |
Added basic `ChosenFiniteCoproducts` class, and started porting some of the lemmas about `ChosenFiniteProducts` suitably translated
---
This, combined with #20182 modified to use chosen finite coproducts and premonoidal categories (#21488), should be enough for me to formalize strong Elgot categories, and hence a lot of categorical iteration theory for my PhD thesis.
Re-done from #21603 to deal with changes in #24399 and #24390
Eventually, if we really want to harmonize approaches, we could introduce an `AddMonoidalCategory` struct and do the analogous to #24399 and #24390 for additive monoidal structure, but that seems like a massive overcomplication for now. It would allow formalizing fun things like rig categories, though.
- [ ] depends on: #30150 |
blocked-by-other-PR
t-category-theory
new-contributor
merge-conflict
awaiting-author
|
290/0 |
Mathlib.lean,Mathlib/CategoryTheory/ChosenFiniteCoproducts.lean |
2 |
9 |
['YaelDillies', 'github-actions', 'imbrem', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'robin-carlier'] |
nobody |
235-10214 7 months ago |
325-71117 325 days ago |
0-581 9 minutes |
| 26765 |
KiringYJ author:KiringYJ |
feat(MeasureTheory/PiSystem): add π-λ theorem and SetLike instance |
Add two small features to `MeasureTheory/PiSystem`:
1. SetLike instance
`instance : SetLike (DynkinSystem α) (Set α)`
This lets us write `s ⊆ d` and `t ∈ d` for a DynkinSystem `d`, matching usual mathlib style.
2. `DynkinSystem.pi_lambda` lemma
Classical π‑λ theorem: if a π‑system `s` is contained in a Dynkin system `d`, every set measurable for `σ(s)` is also in `d`.
Currently, mathlib exposes this result only indirectly (e.g. via `generateFrom_eq`). Although logically equivalent, it is not obvious at first glance that those lemmas are the π‑λ theorem. The new lemma states the result in its familiar textbook form, so users can recognise and cite it immediately.
Both pieces are under 10 lines, term‑mode only, and do not modify existing APIs.
No breaking changes.
No dependencies.
|
awaiting-author
t-measure-probability
new-contributor
|
13/0 |
Mathlib/MeasureTheory/PiSystem.lean |
1 |
14 |
['EtienneC30', 'KiringYJ', 'dagurtomas', 'github-actions', 'ocfnash'] |
RemyDegenne assignee:RemyDegenne |
234-83010 7 months ago |
234-83010 234 days ago |
138-3922 138 days |
| 32169 |
saodimao20 author:saodimao20 |
feat: add convolution_comp_add_right |
This PR adds a lemma `convolution_comp_translation_right` showing that convolution commutes with translation on the right operand. Specifically, it proves that for an additive commutative group $G$, the convolution of a function $f$ with a translated function $x \mapsto g(a + x)$ is equal to the convolution of $f$ and $g$ evaluated at $x + a$.
---
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|
t-analysis
new-contributor
awaiting-author
|
14/0 |
Mathlib/Analysis/Convolution.lean |
1 |
3 |
['github-actions', 'urkud'] |
nobody |
226-39181 7 months ago |
226-39181 226 days ago |
0-82278 22 hours |
| 30525 |
ZihuiBai author:ZihuiBai |
feat(Mathlib/Combinatorics/Enumerative/Polya): Add Polya Counting |
This PR introduces basic definitions and results about colorings under permutation group actions.
A coloring is defined as a function X → Y, and the permutation group Equiv.Perm X acts on colorings by precomposition:
(g • c) x = c (g⁻¹ • x)
This formalizes the natural action of relabeling the elements of X.
Main definitions
MulAction (Equiv.Perm X) (X → Y):
The action of the permutation group on colorings via precomposition.
coloringEquiv (c₁ c₂ : X → Y) : Prop:
Two colorings are equivalent if they lie in the same orbit under this action, i.e.
∃ f : Equiv.Perm X, f • c₁ = c₂.
Main results
smul_eq_iff_mem_stabilizer:
Characterizes when two group actions on the same coloring are equal, showing that
g • c = f • c ↔ f⁻¹ * g ∈ stabilizer c.
coloringEquiv_equivalence:
Proves that coloringEquiv defines an equivalence relation on X → Y.
orbit_size_eq_index:
Reformulates the orbit–stabilizer theorem in the context of colorings:
|orbit c| = |Perm X| / |stabilizer c|
Motivation
These results provide foundational infrastructure for studying Burnside’s lemma and Pólya’s enumeration theorem in Mathlib, where the enumeration of distinct colorings up to symmetry plays a central role. |
t-combinatorics
new-contributor
awaiting-author
merge-conflict
|
113/0 |
Mathlib.lean,Mathlib/Combinatorics/Enumerative/Polya.lean |
2 |
8 |
['IvanRenison', 'alreadydone', 'github-actions', 'mathlib4-merge-conflict-bot'] |
awainverse assignee:awainverse |
218-84320 7 months ago |
227-41463 227 days ago |
39-49182 39 days |
| 31113 |
ZihuiBai author:ZihuiBai |
feat(Mathlib/Combinatorics/Enumerative/Polya.lean): Add additional theorem in `Polya.lean` |
---
- [ ] depends on: #30525
---
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[](https://gitpod.io/from-referrer/)
|
t-combinatorics
new-contributor
blocked-by-other-PR
merge-conflict
|
302/0 |
Mathlib.lean,Mathlib/Combinatorics/Enumerative/Polya.lean |
2 |
4 |
['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
b-mehta assignee:b-mehta |
218-84196 7 months ago |
228-20222 228 days ago |
16-82714 16 days |
| 24441 |
MrSumato author:MrSumato |
feat(Data/List): add Lyndon-Schutzenberger theorem on list commutativity |
Add Lyndon-Schutzenberger theorem on list commutativity. Included definition for List.repeatSelf that returns list repeated n times.
---
This is my first mathlib PR, so any comments are highly appreciated.
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-data
new-contributor
|
129/1 |
Mathlib.lean,Mathlib/Data/List/Commutativity.lean,Mathlib/Data/List/Defs.lean,Mathlib/Data/List/Lemmas.lean |
4 |
38 |
['MrSumato', 'github-actions', 'grunweg', 'madvorak', 'mathlib4-merge-conflict-bot', 'plp127'] |
grunweg assignee:grunweg |
218-79798 7 months ago |
401-19742 401 days ago |
29-59355 29 days |
| 31147 |
daefigueroa author:daefigueroa |
feat(Dynamics): point transitive monoid actions and transitive points |
We define point transitivity for a monoid action on a topological space and define the set of transitive points. We add some basic lemmas and implications between topological transitivity and point transitivity.
---
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- [x] depends on: #28001
[](https://gitpod.io/from-referrer/) |
t-dynamics
new-contributor
awaiting-author
|
114/6 |
Mathlib/Dynamics/Transitive.lean |
1 |
6 |
['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] |
sgouezel assignee:sgouezel |
216-18631 7 months ago |
216-18631 216 days ago |
18-38983 18 days |
| 31987 |
saodimao20 author:saodimao20 |
feat: add monotonicity and relation lemmas for mgf and cgf |
Add two lemmas about moment-generating and cumulant-generating functions:
- `mgf_mono_in_t_of_nonneg`: For nonnegative random variables, the mgf is monotone in the parameter `t`
- `cgf_zero_of_mgf_one`: The cgf equals zero iff the mgf equals one
These lemmas are useful for studying properties of mgf and cgf in probability theory.
Contributed by sequential-intelligence-lab(SIL), University of Virginia
---
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[](https://gitpod.io/from-referrer/)
|
t-measure-probability
new-contributor
awaiting-author
|
21/0 |
Mathlib/Probability/Moments/Basic.lean |
1 |
5 |
['DavidLedvinka', 'github-actions'] |
RemyDegenne assignee:RemyDegenne |
210-10737 6 months ago |
210-10737 210 days ago |
21-31799 21 days |
| 32938 |
0xTerencePrime author:0xTerencePrime |
feat(Order/LocallyFinite): prove DenselyOrdered and LocallyFiniteOrder are incompatible |
## Summary
This PR proves that a nontrivial densely ordered linear order cannot be locally finite.
## Main results
* `not_locallyFiniteOrder`: A densely ordered locally finite linear order must be subsingleton.
* `not_locallyFiniteOrder_of_nontrivial`: The main theorem - incompatibility of the two properties.
Note: This implementation imports `Mathlib.Order.Interval.Set.Infinite` to reuse the existing `Set.Icc_infinite` theorem, ensuring standard library consistency.
## Mathematical content
The key insight is that in a densely ordered type, we can always find a new element between any two distinct elements. This means any nontrivial interval contains infinitely many elements. However, `LocallyFiniteOrder` requires intervals to be finite. This contradiction implies that such a type cannot exist (unless it is trivial).
## Motivation
This resolves a TODO mentioned in #7987 (Data/Finset/LocallyFinite entry).
## Verification
- [x] `lake build Mathlib.Order.LocallyFinite.Basic` passes
- [x] `lake exe runLinter Mathlib.Order.LocallyFinite.Basic` passes
|
t-order
new-contributor
awaiting-author
|
28/0 |
Mathlib/Order/Interval/Finset/Basic.lean |
1 |
10 |
['0xTerencePrime', 'CoolRmal', 'github-actions', 'jcommelin', 'plp127'] |
nobody |
205-34139 6 months ago |
205-34179 205 days ago |
3-22290 3 days |
| 32698 |
farruhx author:farruhx |
feat(List): add aesop / simp annotations to selected lemmas for improved automation |
This PR adds `@[aesop safe]` and `@[simp]` annotations to a set
of List lemmas whose proofs are routine and benefit from standardized
automation. No statements or definitions are changed; only proof annotations
are added.
The lemmas updated in this PR are:
* `or_exists_of_exists_mem_cons`
* `append_subset_of_subset_of_subset`
* `map_subset_iff`
* `append_eq_has_append`
* `append_right_injective`
* `append_left_injective`
* `reverse_surjective`
* `reverse_bijective`
* `mem_getLast?_append_of_mem_getLast?`
* `mem_dropLast_of_mem_of_ne_getLast`
* `idxOf_eq_length_iff`
* `idxOf_append_of_mem`
* `length_eraseP_add_one`
The goal is to make these commonly used lemmas easier for `aesop`-based
automation to resolve, while avoiding any interference with simp-normal-form
lemmas or canonical rewrite rules.
There are no API changes and no new theorems—only improved automation behavior. |
t-data
new-contributor
awaiting-author
|
18/1 |
Mathlib/Data/List/Basic.lean |
1 |
8 |
['artie2000', 'euprunin', 'farruhx', 'github-actions'] |
pechersky assignee:pechersky |
204-68908 6 months ago |
204-68908 204 days ago |
7-31364 7 days |
| 27817 |
zhuyizheng author:zhuyizheng |
feat: add IMO2025P1 |
Add a solution to IMO2025P1, the original problem statement from https://github.com/jsm28/IMOLean
---
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|
IMO
awaiting-author
new-contributor
merge-conflict
|
1310/0 |
Archive.lean,Archive/Imo/Imo2025Q1.lean |
2 |
9 |
['github-actions', 'kim-em', 'mathlib4-merge-conflict-bot', 'zhuyizheng'] |
dwrensha assignee:dwrensha |
204-14705 6 months ago |
263-65673 263 days ago |
54-75088 54 days |
| 33218 |
Blackfeather007 author:Blackfeather007 |
feat(Algebra): Define the associated graded ring to filtered ring |
Define the associated graded ring to a filtered ring.
---
- [ ] depends on: #33217
migrated from https://github.com/leanprover-community/mathlib4/pull/26858 |
t-ring-theory
new-contributor
blocked-by-other-PR
|
450/0 |
Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean |
2 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
201-47370 6 months ago |
201-52655 201 days ago |
0-132 2 minutes |
| 33219 |
Blackfeather007 author:Blackfeather007 |
feat(Algebra): Define associated graded algebra |
Define the associated graded algebra of a filtered algebra, constructed from a special case of associated graded ring.
---
- [ ] depends on: #33218
migrated from #26859
|
t-ring-theory
new-contributor
blocked-by-other-PR
|
563/0 |
Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean |
2 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
201-47262 6 months ago |
201-52429 201 days ago |
0-133 2 minutes |
| 33220 |
Blackfeather007 author:Blackfeather007 |
feat(Algebra): Define associated graded module |
Define the associated graded module to a filtered module.
---
- [ ] depends on: #33218
migrated from #26860
|
t-ring-theory
new-contributor
blocked-by-other-PR
|
669/0 |
Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean |
2 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
201-47178 6 months ago |
201-52241 201 days ago |
0-137 2 minutes |
| 33227 |
Blackfeather007 author:Blackfeather007 |
feat(Algebra): exact of associated graded exact |
We proved that a chain complex is exact if its associated graded complex is exact.
Co-authored-by: Huanyu Zheng @Yu-Misaka [suzuka@misaka-yu.com](mailto:suzuka@misaka-yu.com)
Co-authored-by: Yi Yuan @yuanyi-350 [kysyy1@126.com](mailto:kysyy1@126.com)
Co-authored-by: Weichen Jiao @AlbertJ-314 [albertjiao314@gmail.com](mailto:albertjiao314@gmail.com)
---
- [ ] depends on: #33226
migrated from #26869 |
t-ring-theory
new-contributor
blocked-by-other-PR
|
728/0 |
Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/Exactness.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean |
4 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
201-44850 6 months ago |
201-44851 201 days ago |
0-1208 20 minutes |
| 33226 |
Blackfeather007 author:Blackfeather007 |
feat(Algebra): associated graded exact of exact and strict |
In this file, we define the concept of exhaustive filtrations.
We also prove a AssociatedGradedRingHom sequence is exact iff each GradedPieceHom is exact.
And when a sequence is strict exact, the corresponding AssociatedGradedRingHom sequence is also exact.
Co-authored-by: Huanyu Zheng @Yu-Misaka [suzuka@misaka-yu.com](mailto:suzuka@misaka-yu.com)
Co-authored-by: Yi Yuan @yuanyi-350 [kysyy1@126.com](mailto:kysyy1@126.com)
Co-authored-by: Weichen Jiao @AlbertJ-314 [albertjiao314@gmail.com](mailto:albertjiao314@gmail.com)
---
- [ ] depends on: #33222
migrated from #26868 |
t-ring-theory
new-contributor
blocked-by-other-PR
|
529/0 |
Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/Exactness.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean |
4 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
201-44848 6 months ago |
201-44849 201 days ago |
0-1431 23 minutes |
| 33225 |
Blackfeather007 author:Blackfeather007 |
feat(Algebra): filtered module hom |
In this PR we defined the filtered semi-linear map for filtered module and the associated graded module hom.
---
- [ ] depends on: #33220
- [ ] depends on: #33223
migrated from #26867 |
t-ring-theory
new-contributor
blocked-by-other-PR
|
1205/0 |
Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean |
3 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
201-44847 6 months ago |
201-44848 201 days ago |
0-1805 30 minutes |
| 33224 |
Blackfeather007 author:Blackfeather007 |
feat(Algebra): define filtered alghom |
In this PR, we define the filtered algebra homomorphisms on algebras and prove some basic properties of
them.
---
- [ ] depends on: #33219
- [ ] depends on: #33223
migrated from #26863 |
t-ring-theory
new-contributor
blocked-by-other-PR
|
1055/0 |
Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean |
3 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
201-44845 6 months ago |
201-44846 201 days ago |
0-2046 34 minutes |
| 33223 |
Blackfeather007 author:Blackfeather007 |
feat(Algebra): define filtered ring homomorphism |
In this PR, we define the filtered ring morphisms on rings and prove some basic properties of
them.
Co-authored-by: Huanyu Zheng @Yu-Misaka [suzuka@misaka-yu.com](mailto:suzuka@misaka-yu.com)
Co-authored-by: Yi Yuan @yuanyi-350 [kysyy1@126.com](mailto:kysyy1@126.com)
Co-authored-by: Weichen Jiao @AlbertJ-314 [albertjiao314@gmail.com](mailto:albertjiao314@gmail.com)
---
- [ ] depends on: #33218
- [ ] depends on: #33222
migrated from #26862 |
t-ring-theory
new-contributor
blocked-by-other-PR
|
824/0 |
Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean |
3 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
201-44842 6 months ago |
201-44845 201 days ago |
0-2257 37 minutes |
| 33222 |
Blackfeather007 author:Blackfeather007 |
feat(Algebra): define filtered add group hom |
In this file we define filtered hom and the corresponding associated graded hom for abelian groups.
Co-authored-by: Huanyu Zheng @Yu-Misaka [suzuka@misaka-yu.com](mailto:suzuka@misaka-yu.com)
Co-authored-by: Yi Yuan @yuanyi-350 [kysyy1@126.com](mailto:kysyy1@126.com)
Co-authored-by: Weichen Jiao @AlbertJ-314 [albertjiao314@gmail.com](mailto:albertjiao314@gmail.com)
---
- [ ] depends on: #33217
migrated from #26861
|
new-contributor
t-ring-theory
blocked-by-other-PR
|
368/0 |
Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean |
3 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
201-44841 6 months ago |
201-44842 201 days ago |
0-2387 39 minutes |
| 33163 |
Aaron1011 author:Aaron1011 |
feat: prove subgroup of (M -> Z) is finitely generated |
---
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|
t-ring-theory
new-contributor
awaiting-author
|
5/0 |
Mathlib/RingTheory/DedekindDomain/Dvr.lean |
1 |
2 |
['erdOne', 'github-actions'] |
alreadydone assignee:alreadydone |
196-82929 6 months ago |
196-82929 196 days ago |
5-82139 5 days |
| 33502 |
MrQubo author:MrQubo |
fix(Tactic/ProxyType): Pass params explicitly in proxy_equiv% implementation |
Fix [#mathlib4 > `deriving Fintype` with Prop](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.60deriving.20Fintype.60.20with.20Prop/with/566118621)
---
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|
new-contributor
t-meta
WIP
|
12/2 |
Mathlib/Tactic/ProxyType.lean,MathlibTest/DeriveFintype.lean |
2 |
7 |
['MrQubo', 'github-actions', 'kmill'] |
kmill assignee:kmill |
189-78044 6 months ago |
189-78045 189 days ago |
0-60133 16 hours |
| 17176 |
arulandu author:arulandu |
feat: integrals and integrability with .re |
Lemmas for swapping order of .re and integration/integrability.
---
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|
merge-conflict
awaiting-author
new-contributor
t-measure-probability
please-adopt
|
49/0 |
Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean |
4 |
32 |
['EtienneC30', 'arulandu', 'github-actions', 'loefflerd'] |
nobody |
187-81042 6 months ago |
635-41879 635 days ago |
9-73631 9 days |
| 33299 |
kingiler author:kingiler |
feat: Add decidable membership for Interval |
Implemented membership and corresponding decidable instance for `Interval`.
Related [#mathlib4 > Proposal: Add decidable membership for Interval](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Proposal.3A.20Add.20decidable.20membership.20for.20Interval/with/565438009).
---
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|
awaiting-author
new-contributor
t-order
|
16/1 |
Mathlib/Order/Interval/Basic.lean |
1 |
5 |
['Vierkantor', 'eric-wieser', 'github-actions', 'kingiler'] |
Vierkantor assignee:Vierkantor |
185-4948 6 months ago |
185-4948 185 days ago |
13-42146 13 days |
| 33948 |
anivegesana author:anivegesana |
feat(Analysis/Normed/Algebra): matrix exponential of nilpotent matrix |
Where the matrix exponential and nilpotent elements are defined, both the matrix exponential and the nilpotent element exponential. I had to add a different theorem for normed space exponential and the matrix exponential since the right instances wouldn't be synthesized. Help with golfing would be appreciated.
---
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|
new-contributor
t-analysis
|
34/0 |
Mathlib/Analysis/Normed/Algebra/Exponential.lean,Mathlib/Analysis/Normed/Algebra/MatrixExponential.lean |
2 |
1 |
['github-actions'] |
nobody |
179-48701 5 months ago |
179-45329 179 days ago |
0-3444 57 minutes |
| 30391 |
rudynicolop author:rudynicolop |
feat(Data/List): list splitting definitions and lemmas |
This PR continues the work from #24395.
Original PR: https://github.com/leanprover-community/mathlib4/pull/24395 |
t-data
new-contributor
awaiting-author
|
108/2 |
Mathlib/Data/List/Perm/Lattice.lean,Mathlib/Data/List/TakeDrop.lean |
2 |
50 |
['BoltonBailey', 'IlPreteRosso', 'TwoFX', 'Vierkantor', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'rudynicolop'] |
TwoFX assignee:TwoFX |
177-16047 5 months ago |
177-24569 177 days ago |
93-10641 93 days |
| 29282 |
Jlh18 author:Jlh18 |
feat(CategoryTheory): HasColimits instance on Grpd |
Show that the category of groupoids has all small colimits, as a coreflective subcategory of `Cat`, which has all small colimits. The right adjoint of the forgetful functor is the core functor `CategoryTheory.Core.functor`.
- [ ] depends on: #29283 [Core of a category as a functor]
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
blocked-by-other-PR
new-contributor
t-category-theory
|
140/4 |
Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/CategoryTheory/Category/Grpd.lean,Mathlib/CategoryTheory/Core.lean,Mathlib/CategoryTheory/Groupoid/Grpd/Colimit.lean,Mathlib/CategoryTheory/Groupoid/Grpd/Core.lean |
6 |
3 |
['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
175-26127 5 months ago |
312-57911 312 days ago |
0-396 6 minutes |
| 34141 |
gululu996-ui author:gululu996-ui |
feat(Combinatorics/SimpleGraph/Acyclic): finite trees have at least two degree-one vertices |
Add a lemma showing that a finite tree with at least two vertices has at least two vertices of degree 1.
- Introduce a helper lemma `SimpleGraph.Connected.one_le_degree` for connected graphs on a nontrivial finite type.
- Prove the leaf-count lower bound via the degree-sum identity and a counting argument.
---
|
awaiting-author
new-contributor
t-combinatorics
|
72/2 |
Mathlib/Combinatorics/SimpleGraph/Acyclic.lean |
1 |
9 |
['IvanRenison', 'SnirBroshi', 'github-actions', 'vlad902'] |
nobody |
171-9270 5 months ago |
172-77106 172 days ago |
1-23617 1 day |
| 31377 |
CoolRmal author:CoolRmal |
feat: a series of smooth functions that converges (locally) uniformly is smooth |
The main theorem is the proof that an infinite sum of $C^n$ functions on a one-dimensional domain which converges locally uniformly is $C^n$ and related results.
This should be compared with [contDiff_tsum](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Calculus/SmoothSeries.html#contDiff_tsum) where the same result is proved for functions on an arbitrary domain but with a slightly stronger convergence assumption.
The main motivation for this PR is the [#mathlib4 > Tychonov's Counterexample for the Heat Equation](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Tychonov's.20Counterexample.20for.20the.20Heat.20Equation/with/547367912).
---
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t-topology
new-contributor
awaiting-author
merge-conflict
|
110/18 |
Mathlib/Analysis/Calculus/SmoothSeries.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Cotangent.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/QExpansion.lean,Mathlib/Topology/Algebra/InfiniteSum/TsumUniformlyOn.lean,Mathlib/Topology/Algebra/InfiniteSum/UniformOn.lean |
5 |
20 |
['CoolRmal', 'github-actions', 'mathlib4-merge-conflict-bot', 'ocfnash', 'sgouezel'] |
ocfnash assignee:ocfnash |
164-77768 5 months ago |
226-8333 226 days ago |
8-15343 8 days |
| 34130 |
FlAmmmmING author:FlAmmmmING |
feat(Combinatorics/SimpleGraph/Acyclic): Add new theorem `isTree_iff_uniqueShortest_path` |
---
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|
awaiting-author
t-combinatorics
new-contributor
|
28/1 |
Mathlib/Combinatorics/SimpleGraph/Acyclic.lean |
1 |
9 |
['IvanRenison', 'github-actions', 'metakunt', 'vlad902'] |
nobody |
163-37296 5 months ago |
172-21311 172 days ago |
2-6824 2 days |
| 32609 |
PrParadoxy author:PrParadoxy |
feat(LinearAlgebra/PiTensorProduct): Relation between nested tensor products and tensor products indexed by dependent sums |
Product tensors in `⨂ j : (Σ i, β i), s j.fst j.snd` can be mapped to
product tensors in `⨂ i, ⨂ b : β i, s i b`. If the outer index type is
finite, the two types are equivalent.
This allows the definition of endomorphisms on PiTensorProducts by
specifying them on disjoint subsets of the index set. Such constructions
are common e.g. in quantum circuits, quantum cellular automata, and
renormalization procedures.
---
WIP.
This PR contains two "requests for comments". Essentially:
* Is a single complex-to-define linear equivalence preferable over
several less complex ones, which might however be of limited interest
by themselves?
* Which trade-offs are appropriate to make things computable?
- [ ] depends on: #32608
- [x] depends on: #32600
- [x] depends on: #32598
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|
new-contributor
blocked-by-other-PR
merge-conflict
t-algebra
label:t-algebra$ |
683/0 |
Mathlib.lean,Mathlib/Data/Sigma/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Nested.lean,Mathlib/LinearAlgebra/PiTensorProduct/Set.lean |
5 |
5 |
['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
161-75101 5 months ago |
215-75539 215 days ago |
0-2004 33 minutes |
| 30260 |
imbrem author:imbrem |
feat(CategoryTheory/Monoidal): added CocartesianMonoidalCategory |
As discussed in #21603 and #28718; this implements chosen finite coproducts on top of `AddMonoidalCategory` as defined in #30150
---
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- [ ] depends on: #30150
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|
merge-conflict
blocked-by-other-PR
large-import
new-contributor
t-category-theory
|
839/125 |
Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Cocartesian/Basic.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Tactic/ToAdditive/GuessName.lean |
5 |
4 |
['github-actions', 'imbrem', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
161-27532 5 months ago |
279-65529 279 days ago |
0-206 3 minutes |
| 30258 |
imbrem author:imbrem |
feat(CategoryTheory/Monoidal): to_additive for proofs using `monoidal` |
Building on #30150, this allows us to use `@[to_additive]` on proofs containing `monoidal`, by tagging the lemmas `monoidal` outputs with `@[to_additive]` as appropriate.
Testing on my branch [`additive-monoidal-coherence`](https://github.com/imbrem/mathlib4/tree/additive-monoidal-coherence) shows that this works.
It is still future work to have either the `monoidal` tactic or a new `add_monoidal` tactic work for `AddMonoidalCategory` instances directly.
---
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- [ ] depends on: #30150
[](https://gitpod.io/from-referrer/)
|
merge-conflict
blocked-by-other-PR
large-import
new-contributor
t-category-theory
|
524/140 |
Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/MonoidalComp.lean,Mathlib/Tactic/ToAdditive/GuessName.lean |
6 |
3 |
['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
161-27525 5 months ago |
279-70154 279 days ago |
0-241 4 minutes |
| 31102 |
JOSHCLUNE author:JOSHCLUNE |
feat: require LeanHammer |
Experimenting with adding LeanHammer as a mathlib dependency
---
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|
merge-conflict
new-contributor
t-meta
|
61/4 |
Mathlib/Tactic/Common.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,MathlibTest/Hammer.lean,lake-manifest.json,lakefile.lean |
5 |
2 |
['github-actions', 'mathlib4-merge-conflict-bot'] |
nobody |
161-18007 5 months ago |
236-61210 236 days ago |
0-150 2 minutes |
| 34053 |
christian-oudard author:christian-oudard |
feat: Add error function (erf) and complementary error function (erfc) |
## Summary
I was doing some finance math and needed the Error Function, so I thought I'd contribute it.
### Main definitions
* `Real.erf`: The error function, defined as `(2/√π) ∫₀ˣ e^(-t²) dt`
* `Real.erfc`: The complementary error function, defined as `1 - erf x`
### Main results
* `Real.erf_zero`: `erf 0 = 0`
* `Real.erf_neg`: `erf` is an odd function: `erf (-x) = -erf x`
* `Real.erf_tendsto_one`: `erf x → 1` as `x → ∞`
* `Real.erf_tendsto_neg_one`: `erf x → -1` as `x → -∞`
* `Real.erf_le_one`: `erf x ≤ 1` for all `x`
* `Real.neg_one_le_erf`: `-1 ≤ erf x` for all `x`
* `Real.deriv_erf`: `deriv erf x = (2/√π) * exp(-x²)`
* `Real.differentiable_erf`: `erf` is differentiable
* `Real.continuous_erf`: `erf` is continuous
* `Real.strictMono_erf`: `erf` is strictly monotone
Also adds `erf` to `docs/overview.yaml` under Special Functions.
---
- [x] Builds successfully
- [x] `lake exe runLinter` passes
- [x] `lake exe mk_all --check` passes |
t-analysis
new-contributor
awaiting-author
|
333/0 |
Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Erf.lean,docs/overview.yaml |
3 |
18 |
['SnirBroshi', 'christian-oudard', 'github-actions', 'j-loreaux', 'plp127'] |
j-loreaux assignee:j-loreaux |
158-55436 5 months ago |
159-5889 159 days ago |
14-69133 14 days |
| 33601 |
nielstron author:nielstron |
feat(Computability/ContextFreeGrammar): Concatenation of CFGs is CFG |
---
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- [ ] depends on: #33599
- [ ] depends on: #33592
[](https://gitpod.io/from-referrer/)
|
t-computability
new-contributor
blocked-by-other-PR
|
941/0 |
Mathlib/Computability/ContextFreeGrammar.lean |
1 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
158-33149 5 months ago |
188-17012 188 days ago |
0-412 6 minutes |
| 34394 |
Citronhat author:Citronhat |
feat(Algebra/Order/Ring): add constructors for linear ordered rings |
Add constructors for ordered rings from `mul_nonneg` / `mul_pos` that derive `ZeroLEOneClass` from a linear order. |
new-contributor
t-algebra
awaiting-author
label:t-algebra$ |
31/14 |
Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/RingTheory/HahnSeries/Lex.lean |
2 |
6 |
['Citronhat', 'Vierkantor', 'github-actions', 'leanprover-radar'] |
Vierkantor assignee:Vierkantor |
156-25511 5 months ago |
156-25511 156 days ago |
12-25418 12 days |
| 33493 |
michelsol author:michelsol |
feat(RingTheory/Polynomial): An explicit formula for the Chebyshev polynomials of the first kind |
Adds the following explicit formula on the Chebyshev polynomial of the first kind of order n.
${ T_{n}(x)\ =\ \sum \limits _{k=0}^{\lfloor {\frac {n}{2}}\rfloor } {\binom {n}{2k}} \left(\ X^{2}-1\ \right)^{k}\ X^{n-2k}}$
This explicit formula can be found [here](https://en.wikipedia.org/wiki/Chebyshev_polynomials#Explicit_expressions). There is a proof using complex numbers but it only works if the ring R = ℂ.
The proof here is by induction and works in a commutative ring R.
Mathlib seems to extend the definition of Chebyshev polynomials for $n \in \mathbb{Z}$ but this would make the formula more cumbersome with `n.natAbs` in place of `n`'s, so I expressed it on `n : ℕ` directly.
---
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|
t-ring-theory
new-contributor
awaiting-author
|
51/1 |
Mathlib/RingTheory/Polynomial/Chebyshev.lean |
1 |
8 |
['YuvalFilmus', 'erdOne', 'github-actions', 'metakunt', 'michelsol'] |
chrisflav assignee:chrisflav |
154-61750 5 months ago |
154-61750 154 days ago |
35-16104 35 days |
| 26986 |
WangYiran01 author:WangYiran01 |
feat(Partition): add bijection for partitions with max part ≤ r |
This PR adds a new theorem `partition_max_equals_bound` to `Mathlib.Combinatorics.Enumerative.Partition`.
It constructs a bijection between:
- The set of partitions of `n` in which `r ∈ π.parts` and all parts are `≤ r`, and
- The set of partitions of `n - r` whose largest part is at most `r`.
This provides a constructive proof via removing/adding `r` from/to the partition multiset, in line with classical enumerative combinatorics.
Contributed by Yiran Wang.
|
awaiting-author
t-combinatorics
new-contributor
merge-conflict
|
92/0 |
Mathlib/Combinatorics/Enumerative/Partition/Basic.lean,Mathlib/Data/Multiset/Lattice.lean |
2 |
20 |
['WangYiran01', 'github-actions', 'jcommelin', 'kckennylau', 'kim-em', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] |
b-mehta assignee:b-mehta |
152-10224 5 months ago |
185-33092 185 days ago |
120-67067 120 days |
| 33969 |
goliath-klein author:goliath-klein |
refactor(PiTensorProduct/{InjectiveNorm, ProjectiveNorm}): Currently, injectiveSeminorm = projectiveSeminorm |
**WIP / RFC!**
Arguably, `injectiveSeminorm` should be re-defined in Mathlib. See #34137 and [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/injectiveSeminorm/with/568798261) for context.
In this file, we collect some results about the current definition and a possible alternative.
Contents:
* A theorem `injectiveSeminorm_eq_projectiveSeminorm` formalizing the equality of the current definitions. However, I think it is unlikely that keeping the alternative characterization would be worth the effort. The interesting direction `(L2') ≤ (L1)` follows from `norm_eval_le_projectiveSeminorm` which is still present. The converse direction is [somewhat tautological](https://github.com/leanprover-community/mathlib4/pull/34137). A proof of `(L2) = (L1)` (probably requiring Hahn-Banach) might be more interesting.
* A preliminary implementation of the injective seminorm as commonly understood.
* Sufficient conditions for the multiplicativity property `‖⨂ m i‖_∧ = ∏ ‖m i‖` to hold. This implements a TBD item.
---
Co-authored-by: Davood H. H. Tehrani
[](https://gitpod.io/from-referrer/)
|
WIP
t-analysis
new-contributor
large-import
merge-conflict
|
774/387 |
Mathlib.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Analysis/Normed/Module/HahnBanach.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/InjectiveSeminorm.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/LeastReasonable.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Analysis/Normed/Operator/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean |
8 |
3 |
['github-actions', 'goliath-klein', 'mathlib-merge-conflicts'] |
nobody |
150-79974 5 months ago |
179-8678 179 days ago |
0-23 23 seconds |
| 34159 |
wangying11123 author:wangying11123 |
feat(Geometry/Euclidean/Similarity): Add Triangle similarity on oangle |
Add theorems about triangles similarity on oangle |
t-euclidean-geometry
new-contributor
awaiting-author
|
154/1 |
Mathlib/Geometry/Euclidean/Similarity.lean |
1 |
8 |
['LLaurance', 'github-actions', 'jsm28', 'wangying11123'] |
jsm28 assignee:jsm28 |
149-20874 4 months ago |
149-68103 149 days ago |
7-49555 7 days |
| 33050 |
mkaratarakis author:mkaratarakis |
feat: lemmas for the analytic part of the proof of the Gelfond–Schneider theorem |
Lemmas missing for the formalisation of the proof of the Gelfond–Schneider theorem
---
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|
t-number-theory
new-contributor
WIP
|
238/0 |
Mathlib.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Complex/CauchyIntegral.lean,Mathlib/NumberTheory/Transcendental/AnalyticPart.lean,Mathlib/NumberTheory/Transcendental/AnalyticPart2.lean |
6 |
113 |
['SnirBroshi', 'github-actions', 'j-loreaux', 'mkaratarakis', 'riccardobrasca', 'vihdzp'] |
riccardobrasca assignee:riccardobrasca |
148-3254 4 months ago |
158-22511 158 days ago |
6-26374 6 days |
| 33281 |
michelsol author:michelsol |
feat(Analysis/SpecialFunctions/Integrals): integral of 1/sqrt(1-x^2) and its integrability. |
Add the integral of the derivative of arcsin and its integrability.
---
- [ ] depends on: #33280
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[](https://gitpod.io/from-referrer/)
|
new-contributor
merge-conflict
t-analysis
|
59/0 |
Mathlib/Analysis/SpecialFunctions/Integrability/Basic.lean,Mathlib/Analysis/SpecialFunctions/Integrals/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean |
3 |
3 |
['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] |
nobody |
147-31561 4 months ago |
198-85786 198 days ago |
0-2872 47 minutes |
| 33712 |
wangying11123 author:wangying11123 |
feat(Geometry/Euclidean/Angle/Unoriented/Projection): Add sameray_orthogonalProjection_vsub_of_angle_lt |
Add sameray_orthogonalProjection_vsub_of_angle_lt
`sameray_orthogonalProjection_vsub_of_angle_lt`
When an angle is acute, the vector to the orthogonal projection lies in the same ray as the given direction vector. |
new-contributor
t-euclidean-geometry
awaiting-author
|
20/0 |
Mathlib/Geometry/Euclidean/Angle/Unoriented/Projection.lean |
1 |
4 |
['JovanGerb', 'github-actions', 'j-loreaux'] |
JovanGerb assignee:JovanGerb |
145-11491 4 months ago |
145-11591 145 days ago |
39-79348 39 days |
| 30667 |
FrederickPu author:FrederickPu |
feat(Mathlib/Algebra/Group/Subgroup/Pointwise): subgroup mul |
Title:
feat: pointwise products for subgroups
Description:
showed the point-wise product of disjoint subgroups is equivalent to their Cartesian product. Based on https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/useful.20group.20theory.20lemmas/with/546738566.
---
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|
t-algebra
new-contributor
label:t-algebra$ |
28/0 |
Mathlib/Algebra/Group/Subgroup/Pointwise.lean |
1 |
23 |
['FrederickPu', 'eric-wieser', 'github-actions', 'plp127', 'tb65536'] |
nobody |
145-10000 4 months ago |
145-11198 145 days ago |
1-24662 1 day |
| 33793 |
LTolDe author:LTolDe |
feat(MeasureTheory/Constructions/Polish/Basic): add lemma AnalyticSet.inter_nonempty_of_nowhereMeagre |
add lemma AnalyticSet.inter_nonempty_of_nowhereMeagre, the main ingredient for the proof of the **Effros' Theorem**, see [#mathlib4 > Effros Theorem](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Effros.20Theorem/with/566543328)
introduce definition of a nowhere meagre set
---
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[](https://gitpod.io/from-referrer/)
|
t-measure-probability
new-contributor
awaiting-author
|
37/0 |
Mathlib/MeasureTheory/Constructions/Polish/Basic.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Topology/GDelta/Basic.lean |
3 |
8 |
['MichaelStollBayreuth', 'erdOne', 'github-actions', 'j-loreaux'] |
kex-y assignee:kex-y |
145-5757 4 months ago |
145-5963 145 days ago |
39-9588 39 days |
| 35313 |
LexinonCraft author:LexinonCraft |
feat: IMO 2025 Q4 |
This adds a solution for problem 4 from the International Math Olympiad 2025.
--- |
IMO
new-contributor
awaiting-author
|
631/0 |
Archive.lean,Archive/Imo/Imo2025Q4.lean |
2 |
4 |
['LexinonCraft', 'github-actions', 'jsm28'] |
jsm28 assignee:jsm28 |
144-62031 4 months ago |
144-62031 144 days ago |
3-30421 3 days |
| 33276 |
NicolaBernini author:NicolaBernini |
feat: Rename List.reverse_perm to List.reverse_perm_self and List.reverse_perm' to List.reverse_perm_iff |
---
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[](https://gitpod.io/from-referrer/)
|
new-contributor
awaiting-author
t-data
merge-conflict
|
17/15 |
Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Data/Finset/Dedup.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Defs.lean,Mathlib/Data/List/Perm/Lattice.lean,Mathlib/Data/List/Permutation.lean,Mathlib/Data/Multiset/Defs.lean,Mathlib/NumberTheory/Divisors.lean |
8 |
5 |
['Ruben-VandeVelde', 'github-actions', 'mathlib-merge-conflicts'] |
kim-em assignee:kim-em |
144-45775 4 months ago |
195-24048 195 days ago |
4-4467 4 days |
| 34674 |
Citronhat author:Citronhat |
feat(Algebra/Order/Ring): replace ENNReal lemmas with WithTop versions |
* Add `WithTop` versions of basic multiplicative order lemmas.
* Use the new `WithTop` lemmas to replace `ENNReal` proofs and address six TODOs.
* Fix a typo in the `pos_of_ne_zero` alias name. |
new-contributor
t-algebra
merge-conflict
label:t-algebra$ |
46/15 |
Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Data/ENNReal/Operations.lean |
3 |
5 |
['Citronhat', 'Ruben-VandeVelde', 'github-actions', 'mathlib-merge-conflicts'] |
Ruben-VandeVelde assignee:Ruben-VandeVelde |
144-25509 4 months ago |
144-25510 144 days ago |
17-1225 17 days |
| 33746 |
ster-oc author:ster-oc |
feat(Algebra/Module/ZLattice): align `ZSpan.floor` to `Int.floor` API |
This PR adds some of the existent lemmas about `Int.floor`, `Int.ceil` and `Int.fract` to the `ZSpan` namespace.
---
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|
t-algebra
new-contributor
merge-conflict
label:t-algebra$ |
353/145 |
Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Topology/Algebra/Order/Floor.lean |
3 |
8 |
['github-actions', 'joelriou', 'mathlib-merge-conflicts', 'ster-oc'] |
joelriou assignee:joelriou |
139-42407 4 months ago |
139-42407 139 days ago |
30-23357 30 days |
| 31766 |
SuccessMoses author:SuccessMoses |
feat(Topology/EMetricSpace): continuity of arc length |
fixes half of #31751
---
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|
new-contributor
t-topology
awaiting-author
merge-conflict
|
396/0 |
Mathlib.lean,Mathlib/Topology/EMetricSpace/ArcLength.lean,Mathlib/Topology/EMetricSpace/BoundedVariation.lean |
3 |
40 |
['SnirBroshi', 'SuccessMoses', 'alreadydone', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-merge-conflicts'] |
nobody |
138-74104 4 months ago |
214-74974 214 days ago |
2-77182 2 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 |
136-32445 4 months ago |
482-10384 482 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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- ...
Deletions:
- Nat.bit1_add_bit1
- ...
Any other comments you want to keep out of the PR commit should go
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-->
[](https://gitpod.io/from-referrer/)
|
new-contributor
t-computability
merge-conflict
awaiting-author
awaiting-zulip
|
218/2 |
Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean |
2 |
91 |
['EtienneC30', 'b-mehta', 'ctchou', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] |
nobody |
136-32429 4 months ago |
433-14323 433 days ago |
39-60738 39 days |
| 23929 |
meithecatte author:meithecatte |
feat(Computability/NFA): improve bound on pumping lemma |
---
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- [x] depends on: #25321
[](https://gitpod.io/from-referrer/)
|
t-computability
awaiting-zulip
new-contributor
awaiting-author
|
101/10 |
Mathlib/Computability/EpsilonNFA.lean,Mathlib/Computability/NFA.lean |
2 |
42 |
['YaelDillies', 'dagurtomas', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'meithecatte'] |
nobody |
135-52458 4 months ago |
399-81757 399 days ago |
34-10092 34 days |
| 35128 |
DAE123456 author:DAE123456 |
feat : Define anti_pascal |
---
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[](https://gitpod.io/from-referrer/)
|
t-algebra
new-contributor
awaiting-author
label:t-algebra$ |
81/0 |
Archive.lean,Archive/Imo/Imo2018Q3.lean |
2 |
5 |
['DAE123456', 'github-actions', 'grunweg', 'vihdzp'] |
nobody |
135-49984 4 months ago |
151-19230 151 days ago |
0-531 8 minutes |
| 8102 |
miguelmarco author:miguelmarco |
feat(Tactic): add `unify_denoms` and `collect_signs` tactics |
This PR adds four new tactics:
- `unify_denoms` tries to put expressions with several divisions in a form with only one division. In the case of fields, it works similarly to `field_simp`, but if the hypothesis about denominators being nonzero are not present, it assumes them, and leaves them as new goals to prove. In that sense, it is an "unsafe" tactic (but can be useful nevertheless, for example when you can't find which exact hypothesis is missing). It also works with expressions of naturals and Euclidean domains, assuming the corresponding hypothesis about the denominators dividing the numerators.
- `unify_denoms!` extends `unify_denoms` to work with (in)equalities, assuming also that the denominators, once in normal form, are positive.
- `collect_signs` works similarly with expressions using sums and substractions: it tries to put them in a form of one sum minus other sum. In the case of working with naturals, it assumes that we never substract a bigger number from a smaller one.
Both are implemented essentially as a macro that combines several rewriting rules. Some new lemmas with the corresponding rules are added.
--- |
please-adopt
new-contributor
merge-conflict
modifies-tactic-syntax
good first issue
t-meta
|
407/0 |
Mathlib.lean,Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CollectSigns.lean,Mathlib/Tactic/UnifyDenoms.lean,MathlibTest/unify_denoms.lean,scripts/noshake.json |
7 |
55 |
['Paul-Lez', 'YaelDillies', 'github-actions', 'joneugster', 'kbuzzard', 'mathlib4-merge-conflict-bot', 'miguelmarco'] |
nobody |
135-16756 4 months ago |
423-85628 423 days ago |
17-14109 17 days |
| 35603 |
2500223210-max author:2500223210-max |
feat(GroupTheory/Frattini): add more theorems |
Add some contents about frattini subgroup into Mathlib GroupTheory Frattini.lean,including
* (convenient lemma)A subgroup contained in all maximal subgroup is contained in
the FRattini subgroup
* A subgroup (say H) has a proper complement (meaning for some proper subgroup K,
K and H generate the whole group)if and only if it is not contained
in the Frattini subgroup.
* A group is cyclic iff its Frattini factor(the quotient group wrt Frattini subgroup)
is cyclic.
* The Frattini factor of a finite p-group is elementary abelian(that is,an abelian
group G with Gᵖ={1})
* A finite p-group has trivial Frattini subgroup iff the group is elementary abelian.
* Burnside theorem of Frattini factor of finite p-group.
---
|
new-contributor
t-group-theory
large-import
awaiting-author
|
764/1 |
Mathlib/GroupTheory/Frattini.lean |
1 |
3 |
['github-actions', 'tb65536'] |
nobody |
135-14437 4 months ago |
141-1810 141 days ago |
0-103 1 minute |
| 33791 |
PhoenixIra author:PhoenixIra |
feat: Generalization of FixedPointApproximants to CompletePartialOrder |
---
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This PR provides a generalization of FixedPointApproximants to CompletePartialOrder. Not every theorem can be generalized, as sometimes we require additional conditions (namely `x ≤ f x`) in order to guarantee that the set is directed and thus the supremum is well-defined. This is not necessary in a CompleteLattice.
[](https://gitpod.io/from-referrer/)
|
new-contributor
t-order
merge-conflict
|
223/100 |
Mathlib/Order/CompletePartialOrder.lean,Mathlib/SetTheory/Ordinal/FixedPointApproximants.lean |
2 |
21 |
['PhoenixIra', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] |
PhoenixIra and vihdzp assignee:PhoenixIra assignee:vihdzp |
134-79141 4 months ago |
134-79141 134 days ago |
38-12430 38 days |
| 26013 |
tsuki8 author:tsuki8 |
feat(Data/Finset/Card,Data/Set/Finite/Basic): TODO needs a better title |
add `card_bijOn` and `finset_subset_preimage_of_finite_image`
Add `card_bijOn`: proves that for a bijection between finsets, their cardinalities are equal
Add `finset_subset_preimage_of_finite_image`: constructs a finset subset preserving image cardinality
Co-authored-by: Junyu Guo <hagb@hagb.name>
---
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[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-data
new-contributor
|
15/0 |
Mathlib/Data/Finset/Card.lean,Mathlib/Data/Set/Finite/Basic.lean |
2 |
6 |
['Ruben-VandeVelde', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
132-54152 4 months ago |
376-33885 376 days ago |
13-85893 13 days |
| 35442 |
dhyan-aranha author:dhyan-aranha |
feat: Affine line with doubled origin counter example |
---
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[](https://gitpod.io/from-referrer/)
|
new-contributor
awaiting-author
t-algebraic-geometry
|
305/0 |
Counterexamples.lean,Counterexamples/AffineLineWithDoubledOrigin.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/Topology/Category/TopCat/Limits/Pullbacks.lean |
4 |
21 |
['BryceT233', 'chrisflav', 'dhyan-aranha', 'github-actions'] |
nobody |
132-27082 4 months ago |
145-15087 145 days ago |
0-3706 1 hour |
| 14313 |
grhkm21 author:grhkm21 |
feat(RepresentationTheory/FdRep): FdRep is a full subcategory of Rep |
```
/-- Equivalence between `FDRep` and the full subcategory of finite dimensional `Rep`. -/
def equivFiniteDimensional :
FDRep k G ≌ FullSubcategory (fun V : Rep k G ↦ FiniteDimensional k V)
``` |
merge-conflict
t-algebra
t-category-theory
new-contributor
label:t-algebra$ |
47/8 |
Mathlib/RepresentationTheory/FDRep.lean |
1 |
21 |
['fpvandoorn', 'github-actions', 'grhkm21', 'joelriou', 'kim-em', 'mathlib-bors'] |
nobody |
128-22446 4 months ago |
720-74870 720 days ago |
4-83177 4 days |
| 33592 |
nielstron author:nielstron |
feat(Computability/ContextFreeGrammar): mapping between two types of nonterminal symbols |
This PR picks up https://github.com/leanprover-community/mathlib4/pull/15895 and resolves the failing lemma by redefining Good symbols.
---
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I checked that https://github.com/leanprover-community/mathlib4/pull/13514 builds correctly when based on this build. PR for that is #33599
This is my first contribution please let me know of any changes I should outline.
[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-computability
new-contributor
|
160/0 |
Mathlib/Computability/ContextFreeGrammar.lean |
1 |
34 |
['YaelDillies', 'github-actions', 'madvorak', 'nielstron'] |
nobody |
128-11414 4 months ago |
177-39941 177 days ago |
10-68503 10 days |
| 35144 |
daniel-carranza author:daniel-carranza |
feat(CategoryTheory/Enriched): tensor product of enriched categories |
For a braided monoidal category `V`, defines the tensor product of `V`-categories `C` and `D`, and shows that the type of `V`-functors out of the tensor product `C \times D` is equivalent to the type of "enriched bifunctors" `EnrichedBifunctor V C D`.
---
This work originates from infinity-cosmos project, where it is used to formalize the notion of cotensors in an enriched category. There are some additional coherence lemmas in a braided monoidal category which have been added.
Currently, line 209 violates the style guideline that terminal simp calls should not be squeezed. When I tried to replace this with a single `simp`, I get an error message: `maximum recursion depth has been reached`. Any suggestions (either with this or anything else) are greatly appreciated - thank you!
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[](https://gitpod.io/from-referrer/)
|
new-contributor
t-category-theory
infinity-cosmos
awaiting-author
|
333/0 |
Mathlib.lean,Mathlib/CategoryTheory/Enriched/TensorProductCategory.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean |
3 |
12 |
['daniel-carranza', 'emilyriehl', 'github-actions', 'joelriou', 'robin-carlier'] |
nobody |
128-7121 4 months ago |
150-80715 150 days ago |
0-1418 23 minutes |
| 27226 |
xcloudyunx author:xcloudyunx |
feat(Combinatorics/SimpleGraph): Add Subgraph.inclusion_edge_apply_coe and inclusion_edgeSet_apply_coe |
This PR continues the work from #25248.
Original PR: https://github.com/leanprover-community/mathlib4/pull/25248 |
awaiting-author
t-combinatorics
new-contributor
merge-conflict
|
14/0 |
Mathlib/Combinatorics/SimpleGraph/Subgraph.lean |
1 |
4 |
['b-mehta', 'github-actions', 'mathlib-merge-conflicts', 'xcloudyunx'] |
b-mehta assignee:b-mehta |
127-84914 4 months ago |
334-65060 334 days ago |
25-83942 25 days |
| 33688 |
Citronhat author:Citronhat |
feat(PMF): add expectation lemmas for Poisson PMF |
This PR adds some basic results about the Poisson distribution, its `PMF`, and its expectation.
**New lemmas:**
* `poissonPMF_apply` — an unfolding lemma for `poissonPMF`.
* `poissonPMFReal_mul_eq_succ_mul` — the standard recursion identity for the Poisson mass function.
* `poissonPMFReal_hasSum_nmul` — shows that `fun n ↦ poissonPMFReal r n * n` has sum `r`.
* `poissonPMF_tsum_nmul` — the corresponding identity at the level of the `PMF`.
* `poissonPMF_coe_tsum_nmul` — the same result after coercion to `ℝ`.
Both `ℝ`-valued and `ℝ≥0∞`-valued formulations are included so that these results can be used conveniently in both Lebesgue and Bochner integration contexts. |
new-contributor
t-measure-probability
awaiting-author
merge-conflict
|
21/0 |
Mathlib/Probability/Distributions/Poisson.lean |
1 |
11 |
['Citronhat', 'DavidLedvinka', 'github-actions', 'mathlib-merge-conflicts', 'urkud'] |
urkud assignee:urkud |
127-66894 4 months ago |
138-81543 138 days ago |
47-76964 47 days |
| 34830 |
parabamoghv author:parabamoghv |
feat(CategoryTheory/Monoidal): add definition of categorical groups |
This PR defines of categorical groups, also known as coherent 2-groups, in mathlib.
Motivation:
Categorical groups are well-studied structures in monoidal category theory, but are not currently available in mathlib. The definitions in this PR follow the existing design patterns used for Category, MonoidalCategory, and BraidedCategory.
This PR focuses on setting up the core structure and notation. Basic lemmas and further developments will be provided in a subsequent PR.
---
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-->
[](https://gitpod.io/from-referrer/)
|
t-category-theory
new-contributor
WIP
merge-conflict
|
163/0 |
Mathlib.lean,Mathlib/CategoryTheory/Monoidal/CategoricalGroups/Basic.lean |
2 |
27 |
['dagurtomas', 'github-actions', 'mathlib-merge-conflicts', 'parabamoghv', 'robin-carlier'] |
robin-carlier assignee:robin-carlier |
127-55369 4 months ago |
142-37409 142 days ago |
5-13145 5 days |
| 35684 |
spitters author:spitters |
feat(CategoryTheory/MarkovCategory): Kleisli PMF is a Markov category |
Add `Mathlib/CategoryTheory/MarkovCategory/KleisliPMF.lean` showing that `KleisliCat PMF` is a `MarkovCategory`.
Uses `Prod` as tensor and `PUnit` as unit; reuses Mathlib's existing `KleisliCat`, `LawfulMonad PMF`, and `MarkovCategory` infrastructure.
Builds the full instance stack:
MonoidalCategory → BraidedCategory → SymmetricCategory →
CopyDiscardCategory → MarkovCategory
---
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[](https://gitpod.io/from-referrer/)
|
t-category-theory
new-contributor
awaiting-author
merge-conflict
|
323/1 |
Mathlib.lean,Mathlib/CategoryTheory/MarkovCategory/KleisliPMF.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean |
3 |
6 |
['dagurtomas', 'github-actions', 'mathlib-merge-conflicts', 'spitters'] |
nobody |
123-44650 4 months ago |
135-76895 135 days ago |
2-47211 2 days |
| 36503 |
Mrigna01 author:Mrigna01 |
Add false theorem test file |
---
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[](https://gitpod.io/from-referrer/)
|
new-contributor |
135/0 |
Mathlib/FalseBench/FalseTheorems.lean |
1 |
3 |
['github-actions'] |
nobody |
122-67932 4 months ago |
122-67658 122 days ago |
0-364 6 minutes |
| 14603 |
awueth author:awueth |
feat: degree is invariant under graph isomorphism |
---
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Mathlib has the definition `SimpleGraph.Iso.mapNeighborSet` which is an equivalence between neighbor sets induced by an isomorphism. Would it be beneficial to add the same equivalence for `neighborFinset`?
[](https://gitpod.io/from-referrer/)
|
WIP
t-combinatorics
new-contributor
|
24/0 |
Mathlib/Combinatorics/SimpleGraph/Map/Finite.lean |
1 |
12 |
['SnirBroshi', 'awueth', 'github-actions', 'jcommelin', 'kim-em', 'urkud'] |
nobody |
122-49330 4 months ago |
699-9769 699 days ago |
31-44440 31 days |
| 33599 |
nielstron author:nielstron |
feat(Computability/ContextFreeGrammar): closure under union |
---
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This PR picks up https://github.com/leanprover-community/mathlib4/pull/13514 and resolves the outstanding errors.
- [ ] depends on: #33592
[](https://gitpod.io/from-referrer/)
|
blocked-by-other-PR
t-computability
new-contributor
|
498/0 |
Mathlib/Computability/ContextFreeGrammar.lean |
1 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
122-32767 4 months ago |
177-41626 177 days ago |
10-65787 10 days |
| 9605 |
davikrehalt author:davikrehalt |
feat(Data/Finset & List): Add Lemmas for Sorting and Filtering |
This PR includes several useful lemmas to the Data/Finset and Data/List modules in Lean's mathlib:
1. `toFinset_filter` (List): Shows that filtering commutes with toFinset.
2. `toFinset_is_singleton_implies_replicate` (List): Shows a list with a singleton toFinset is a List.replicate.
3. `filter_sort_commute` (Finset): Sorting and filtering can be interchanged in Finsets.
4. `Sorted.filter` (List): A sorted list stays sorted after filtering.
5. `Sorted.append_largest` (List): Appending the largest element keeps a list sorted.
6. `sort_monotone_map` (Finset): Relates sorting of a Finset after mapping to sorting of a list.
7. `sort_insert_largest` (Finset): Sorting a Finset with an inserted largest element.
8. `sort_range` (Finset): Sorting a range in a Finset equals the corresponding range list.
9. ~~`filter_eval_true` (List): Filtering a list with a predicate always true keeps the list unchanged.~~
10. ~~`filter_eval_false` (List): Filtering with an always-false predicate gives an empty list.~~
11. ~~`pairwise_concat` (List): Iff condition for Pairwise relation in concatenated lists (similar to pairwise_join).~~
12. `list_map_toFinset` (Finset): toFinset commutes with map under injection
---
- [x] depends on: #15952
This is my first PR to mathlib, so I'm not too familiar with etiquette's and more specifically there are two proofs in the PR which uses aesop, and I am not sure if it's frowned upon. I kept the aesop in there for now as I couldn't construct very short proofs otherwise. The sort_range function proof was suggested in https://leanprover.zulipchat.com/#narrow/stream/113489-new-members/topic/Computing.20Finset.20sort.20of.20Finset.20range/near/410346731 by Ruben Van de Velde. Thanks for your time for improving this PR. |
please-adopt
t-data
new-contributor
merge-conflict
awaiting-author
|
71/0 |
Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finset/Image.lean,Mathlib/Data/Finset/Sort.lean,Mathlib/Data/List/Sort.lean |
4 |
30 |
['YaelDillies', 'davikrehalt', 'eric-wieser', 'github-actions', 'jcommelin', 'urkud', 'vihdzp'] |
nobody |
122-32223 4 months ago |
902-3711 902 days ago |
12-48883 12 days |
| 15720 |
znssong author:znssong |
feat(SimpleGraph): The Bondy-Chvátal theorem |
The proof of the Bondy-Chvátal theorem, with Dirac's theorem and Ore's theorem as its corollary.
- [x] depends on: #15536
- [ ] depends on: #15711
- [ ] depends on: #15578 |
merge-conflict
blocked-by-other-PR
t-combinatorics
new-contributor
|
903/3 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/BondyChvatal.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Path.lean,Mathlib/Combinatorics/SimpleGraph/Walk.lean,Mathlib/Dynamics/FixedPoints/Basic.lean,Mathlib/Dynamics/FixedPoints/Increasing.lean |
8 |
3 |
['github-actions', 'grunweg'] |
nobody |
120-7209 3 months ago |
699-36583 699 days ago |
0-1791 29 minutes |
| 22314 |
shetzl author:shetzl |
feat: add leftmost derivations for context-free grammars |
Leftmost derivations are often easier to reason about than arbitrary derivations. This PR adds leftmost variants of Rewrites, Produces and Derives to the existing definition of context-free grammars and proves that a string of terminals can be derived iff it can be leftmost derived.
Co-authored-by: Tobias Leichtfried <tobias.leichtfried@tuwien.ac.at>
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-computability
awaiting-author
new-contributor
|
383/0 |
Mathlib.lean,Mathlib/Computability/LeftmostDerivation.lean |
2 |
55 |
['YaelDillies', 'github-actions', 'madvorak', 'mathlib4-merge-conflict-bot', 'shetzl'] |
nobody |
120-7173 3 months ago |
429-30469 429 days ago |
72-2963 72 days |
| 31610 |
rudynicolop author:rudynicolop |
feat(Computability/NFA): Kleene star closure for Regular Languages via NFA |
This PR constructs a Kleene star closure for non-epsilon NFAs, and proves that regular languages are closed under Kleene star. The NFA construction is `NFA.kstar`. The main theorems are:
- `NFA.accepts_kstar`: demonstrates that `M.kstar` accepts the Kleene star closure of the language of `M`.
- `IsRegular.kstar`: demonstrates that regular languages are closed under Kleene star.
There is an onging zulip discussion about regular languages in Mathlib: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Regular.20languages.3A.20the.20review.20queue/with/553759136
This discussion is also tracked at #24205.
Furthermore, the construction and proofs in this PR are heavily inspired by @TpmKranz from his #15651. #15651 supersedes this PR, so if it is accepted then this PR is not needed.
---
- [x] depends on: #31038
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[](https://gitpod.io/from-referrer/)
|
t-computability
new-contributor
awaiting-author
awaiting-CI
|
405/7 |
Mathlib/Computability/NFA.lean |
1 |
16 |
['YaelDillies', 'ctchou', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
120-7072 3 months ago |
178-85854 178 days ago |
43-77956 43 days |
| 30872 |
rudynicolop author:rudynicolop |
feat(Computability/NFA): NFA closure under concatenation |
This PR proves that regular languages are closed under concatenation via a direct construction on `NFA`s without `εNFA` nor ε-transitions. The main new definitions and results include:
- `M1.concat M2`, the concatenation of `NFA`s `M1` and `M2`, a direct construction without ε-transitions.
- Theorem `accepts_concat : (M1.concat M2).accepts = M1.accepts * M2.accepts`, showing the correctness of the construction.
- Theorem `IsRegular.mul`, showing that regular languages are closed under concatenation.
---
- [x] depends on: #31038
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[](https://gitpod.io/from-referrer/)
|
t-computability
new-contributor
awaiting-author
|
104/7 |
Mathlib/Computability/NFA.lean |
1 |
67 |
['YaelDillies', 'ctchou', 'eric-wieser', 'github-actions', 'lambda-fairy', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'rudynicolop'] |
nobody |
120-7052 3 months ago |
163-81693 163 days ago |
59-63981 59 days |
| 36587 |
yhx-12243 author:yhx-12243 |
feat(Algebra/GCDMonoid): Distributive lattice structure for Associates in GCDMonoid |
Add a distributive lattice structure for `Associates α` in `GCDMonoid`.
---
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[](https://gitpod.io/from-referrer/)
|
t-algebra
new-contributor
label:t-algebra$ |
61/3 |
Mathlib.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/GCDMonoid/DistribLattice.lean |
3 |
2 |
['github-actions'] |
nobody |
118-12829 3 months ago |
118-11619 118 days ago |
0-2836 47 minutes |
| 35058 |
GrigorenkoPV author:GrigorenkoPV |
chore: move tendsto_{floor,ceil}_at{Top,Bot} |
Moves:
- Topology.Algebra.Order.Floor.tendsto_floor_atTop -> Order.Filter.AtTopBot.Floor.tendsto_floor_atTop
- Topology.Algebra.Order.Floor.tendsto_floor_atBot -> Order.Filter.AtTopBot.Floor.tendsto_floor_atBot
- Topology.Algebra.Order.Floor.tendsto_ceil_atTop -> Order.Filter.AtTopBot.Floor.tendsto_ceil_atTop
- Topology.Algebra.Order.Floor.tendsto_ceil_atBot -> Order.Filter.AtTopBot.Floor.tendsto_ceil_atBot
---
Tracked in #7987
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[](https://gitpod.io/from-referrer/)
|
new-contributor
large-import
awaiting-author
|
22/25 |
Mathlib/Order/Filter/AtTopBot/Floor.lean,Mathlib/Topology/Algebra/Order/Floor.lean |
2 |
3 |
['GrigorenkoPV', 'github-actions', 'j-loreaux'] |
nobody |
117-11478 3 months ago |
123-71652 123 days ago |
27-45743 27 days |
| 35738 |
GrigorenkoPV author:GrigorenkoPV |
perf: remove some `aesop`s and `grind`s |
---
Needs benchmarking. After that I can split it into several smaller portions, if needed.
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|
new-contributor
awaiting-author
|
236/92 |
Mathlib/Data/Finset/Card.lean,Mathlib/Data/Rel.lean,Mathlib/Data/Set/Lattice/Image.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Logic/Equiv/Prod.lean,Mathlib/Order/Interval/Finset/Basic.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Order/SupIndep.lean |
8 |
7 |
['github-actions', 'mathlib-merge-conflicts', 'themathqueen', 'vihdzp'] |
nobody |
116-84736 3 months ago |
137-26329 137 days ago |
0-45593 12 hours |
| 32745 |
LTolDe author:LTolDe |
feat(Topology/Algebra): add MulActionConst.lean |
add Topology/Algebra/MulActionConst.lean
introduce class `ContinuousSMulConst` for a scalar multiplication that is continuous in the first argument, in analogy to `ContinuousConstSMul`
define `MulAction.ball x U` as the set `U • {x}` given `[SMul G X] (x : X) (U : Set G)`
The lemmas shown here will be useful to prove the **Effros Theorem**, see [zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Effros.20Theorem/with/558712441).
---
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|
awaiting-author
new-contributor
t-topology
|
117/0 |
Mathlib.lean,Mathlib/Topology/Algebra/MulActionConst.lean |
2 |
8 |
['LTolDe', 'github-actions', 'urkud'] |
nobody |
116-5179 3 months ago |
180-77923 180 days ago |
16-55121 16 days |
| 34028 |
floor-licker author:floor-licker |
feat(SimpleGraph): add max-flow/min-cut weak duality |
This PR introduces a basic s–t flow setup for undirected SimpleGraphs and proves the standard weak-duality
inequality: for any feasible flow f and any s–t cut S, value f ≤ cutCapacity S.
This is a small, self-contained lemma I extracted while working on larger graph-theoretic formalizations, in particular, results that will ultimately rely on a full max-flow/min-cut theorem. The full MFMC equality/existence statement is not included here. This is the weak-duality direction (∀ f S, value f ≤ cutCapacity S).
|
t-combinatorics
new-contributor
|
169/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/MaxFlowMinCut.lean |
2 |
14 |
['SnirBroshi', 'floor-licker', 'github-actions', 'mathlib-merge-conflicts'] |
kmill assignee:kmill |
114-166 3 months ago |
114-119 113 days ago |
60-20351 60 days |
| 36825 |
danlyng author:danlyng |
feat(MeasureTheory/Integral/IntegralEqImproper): add Iic variants of nonneg/nonpos derivative integrability and FTC-2 |
Add the `Iic` counterparts of the existing `Ioi` results for automatic integrability of derivatives on semi-infinite intervals and the corresponding corollaries computing the integral value. Additionally, apply minor fixes to existing docstrings.
New declarations:
- `integrableOn_Iic_deriv_of_nonneg` / `integrableOn_Iic_deriv_of_nonneg'`
- `integrableOn_Iic_deriv_of_nonpos` / `integrableOn_Iic_deriv_of_nonpos'`
- `integral_Iic_of_hasDerivAt_of_nonneg` / `integral_Iic_of_hasDerivAt_of_nonneg'`
- `integral_Iic_of_hasDerivAt_of_nonpos` / `integral_Iic_of_hasDerivAt_of_nonpos'`
These mirror `integrableOn_Ioi_deriv_of_nonneg`, `integrableOn_Ioi_deriv_of_nonpos`, `integral_Ioi_of_hasDerivAt_of_nonneg`, `integral_Ioi_of_hasDerivAt_of_nonpos` and their primed variants. |
t-measure-probability
new-contributor
awaiting-author
|
107/9 |
Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean |
1 |
7 |
['EtienneC30', 'github-actions'] |
EtienneC30 assignee:EtienneC30 |
113-17473 3 months ago |
113-17473 113 days ago |
2-67942 2 days |
| 32918 |
michelsol author:michelsol |
feat: define `supEdist` and `supDist` |
Create a new file Topology.MetricSpace.SupDistance and define the supremal distance in (extended) metric spaces. The defined `supEdist` and `supDist` will have similar theory to the already existing `infEdist` and `infDist`. The motivation is to be able to define the radius of a minimal bounding sphere as the infimum of the supDist later.
[zulip discussion here](https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Formalizing.20Jung's.20theorem.20and.20minimal.20bounding.20spheres) |
t-topology
new-contributor
merge-conflict
|
75/0 |
Mathlib.lean,Mathlib/Topology/MetricSpace/SupDistance.lean |
2 |
5 |
['github-actions', 'mathlib4-merge-conflict-bot', 'michelsol', 'urkud'] |
nobody |
113-15485 3 months ago |
187-80445 187 days ago |
21-3598 21 days |
| 33668 |
Citronhat author:Citronhat |
feat(PMF): add lintegral formulas for PMF |
This PR introduces two lemmas describing the `lintegral` of a function with respect to the measure induced by a probability mass function:
- `PMF.lintegral_eq_tsum`
- `PMF.lintegral_eq_sum`
These are the `ℝ≥0∞` analogues of the existing Bochner `integral` formulas `integral_eq_tsum` and `integral_eq_sum`. They could be useful for reasoning about expectations and integrability.
In addition, the proof of `integral_eq_sum` is simplified by deriving it directly from `integral_eq_tsum` using `tsum_fintype`. |
t-measure-probability
new-contributor
awaiting-author
merge-conflict
|
14/5 |
Mathlib/Probability/ProbabilityMassFunction/Integrals.lean |
1 |
3 |
['DavidLedvinka', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
112-63072 3 months ago |
131-28167 131 days ago |
55-73479 55 days |
| 35805 |
adrianmartir author:adrianmartir |
feat(NumberTheory/Divisors): Add `infinite_setOf_divisors_iff` |
This proves that the set of divisors `{ m | m | n }` of a natural number `n` is infinite if and only if `n` is zero. The first proof draft was by @Aristotle-Harmonic.
---
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[](https://gitpod.io/from-referrer/)
|
t-number-theory
new-contributor
awaiting-author
|
10/0 |
Mathlib/NumberTheory/Divisors.lean |
1 |
6 |
['adrianmartir', 'alexjbest', 'github-actions', 'tb65536'] |
tb65536 assignee:tb65536 |
109-10817 3 months ago |
109-10818 109 days ago |
27-18698 27 days |
| 31590 |
SuccessMoses author:SuccessMoses |
chore: tag `commutatorElement_def` with `simp` |
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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|
awaiting-author
t-algebra
new-contributor
merge-conflict
label:t-algebra$ |
1/0 |
Mathlib/Algebra/Group/Commutator.lean |
1 |
3 |
['github-actions', 'grunweg', 'mathlib-merge-conflicts'] |
nobody |
108-85886 3 months ago |
241-18421 241 days ago |
0-1762 29 minutes |
| 34722 |
GrigorenkoPV author:GrigorenkoPV |
feat(Data/Finset/RangeDistance): bound distance between elements of `Finset.range` |
---
Rebase of https://github.com/leanprover-community/mathlib4/pull/26347
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|
new-contributor
t-data
awaiting-author
|
34/0 |
Mathlib.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Data/Finset/RangeDistance.lean |
3 |
7 |
['GrigorenkoPV', 'Vierkantor', 'github-actions', 'joneugster', 'mathlib-splicebot', 'plp127'] |
pechersky assignee:pechersky |
108-264 3 months ago |
108-264 107 days ago |
52-18954 52 days |
| 35857 |
AlexeyMilovanov author:AlexeyMilovanov |
feat(Logic.Equiv.BijectiveBase2): add bijective base-2 numeration |
This PR introduces a formalization of the bijective base-2 numeration system.
Unlike standard binary representation, bijective base-2 avoids the "leading zeros" problem, providing a strict mathematical bijection between natural numbers (`ℕ`) and lists of booleans (`List Bool`).
**Main additions:**
* `Equiv.BijectiveBase2.toBits`: Encodes `ℕ` to `List Bool`.
* `Equiv.BijectiveBase2.ofBits`: Decodes `List Bool` to `ℕ`.
* `equivBijectiveBase2`: The formal `ℕ ≃ List Bool` equivalence.
---
Zulip: [#PR reviews > PR #35857: Bijective Base-2 Numeration](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/PR.20.2335857.3A.20Bijective.20Base-2.20Numeration/with/576336540)
Zulip: [#batteries > Upstreaming Nat.Bits](https://leanprover.zulipchat.com/#narrow/channel/348111-batteries/topic/Upstreaming.20Nat.2EBits/with/580736051)
*(Note: This replaces my previously closed PR to avoid the terminology clash between "Dyadic" and dyadic rationals. The namespace and definitions have been updated accordingly).*
*(Note: Used AI to assist with standardizing proof structures).* |
t-logic
new-contributor
LLM-generated
blocked-by-batt-PR
|
95/0 |
Mathlib.lean,Mathlib/Logic/Equiv/ListNatBijective.lean |
2 |
6 |
['AlexeyMilovanov', 'SnirBroshi', 'github-actions', 'joneugster'] |
nobody |
107-24985 3 months ago |
107-25035 107 days ago |
27-59706 27 days |
| 36463 |
AlexeyMilovanov author:AlexeyMilovanov |
feat(Data.Nat.Bits): add Nat.ofBits and prove bits_injective |
This PR introduces `Nat.ofBitsList` for `List Bool` and provides the missing proofs that the standard binary representation `Nat.bits` is injective (`Nat.bits_injective`) and possesses a right inverse for normalized lists (`Nat.bits_ofBitsList`).
`ofBitsList` is implemented as an `abbrev` using `foldr` (keeping it transparent to tactics like `simp`). It serves as the exact left inverse to `bits`. Furthermore, `bits_ofBitsList` establishes that `bits` and `ofBitsList` form a bijection between `ℕ` and the set of lists with no trailing `false` values.
This avoids the name collision with `Nat.ofBits` from `Batteries` and aligns with previous Zulip discussions (see [here](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/PR.20.2335857.3A.20Bijective.20Base-2.20Numeration)) regarding the utility of having a complete list-based API for `Nat.bits` in the library.
CC: @linesthatinterlace
- Adds `Nat.ofBitsList` (as an `abbrev`)
- Adds `Nat.ofBitsList_bits` (left inverse property)
- Adds `Nat.bits_injective`
- Adds `Nat.ofBitsList_eq_zero_iff` (helper lemma for lists without trailing zeros)
- Adds `Nat.bits_ofBitsList` (right inverse property)
---
Zulip: [#PR reviews > PR #35857: Bijective Base-2 Numeration](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/PR.20.2335857.3A.20Bijective.20Base-2.20Numeration/with/576336540)
Zulip: [#batteries > Upstreaming Nat.Bits](https://leanprover.zulipchat.com/#narrow/channel/348111-batteries/topic/Upstreaming.20Nat.2EBits/with/580736051) |
t-data
new-contributor
awaiting-author
blocked-by-batt-PR
|
68/1 |
Mathlib/Data/Nat/Bits.lean |
1 |
5 |
['github-actions', 'joneugster', 'wrenna-robson'] |
nobody |
107-24978 3 months ago |
114-6690 114 days ago |
9-58085 9 days |
| 34419 |
ster-oc author:ster-oc |
feat(RCLike): add `Continuous.re` and similar |
This PR adds dot notation for `re`, `im`, `conj` and `ofReal` for `Continuous`, `LipschitzWith` and `Memℓp`.
Given `hf : Continuous f` it allows to use `hf.re` to express `Continuous (fun x ↦ (f x).re)`, similarly to the usual `hf.add hg`.
I also can add the same features for `Summable` but I am not sure where to place them, suggestions are appreciated!
---
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|
t-analysis
new-contributor
awaiting-author
merge-conflict
|
186/41 |
Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/RCLike/Basic.lean |
3 |
15 |
['github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'ster-oc'] |
j-loreaux assignee:j-loreaux |
103-72447 3 months ago |
137-86202 137 days ago |
8-27645 8 days |
| 30142 |
shalliso author:shalliso |
feat(Topology/Baire): define IsNonMeagre |
non-meagre sets (also known as "of the second category") are worthy of their own definition and API. This was useful to me for formalizing a result of "automatic continuity", that is, a Baire-measurable homomorphism between Polish groups must be continuous. Simply working with the negation of IsMeagre quickly became cumbersome, and non-meagre sets have an important role in the study of Polish (e.g. locally compact) groups.
From https://github.com/shalliso/automatic_continuity
---
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[](https://gitpod.io/from-referrer/)
|
t-topology
new-contributor
merge-conflict
awaiting-author
|
83/1 |
Mathlib/Topology/Baire/NonMeagre.lean,Mathlib/Topology/GDelta/Basic.lean |
2 |
6 |
['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] |
nobody |
103-13309 3 months ago |
282-72459 282 days ago |
0-1020 17 minutes |
| 34487 |
martinwintermath author:martinwintermath |
feat(LinearAlgebra/SesquilinearForm): add instances for SeparatingLeft, SeparatingRight and Nondegenerate |
Add typeclass instances for `Fact B.SeparatingLeft`, `Fact B.SeparatingRight`, `Fact B.Nondegenerate`:
* inferring `Fact B.flip.SeparatingLeft` from `Fact B.SeparatingRight` and vice versa
* inferring `Fact B.SeparatingLeft` and `Fact B.SeparatingRight` from `Fact B.Nondegenerate`
* inferring `Fact B.SeparatingLeft` and `Fact B.Nondegenerate` for `.id` and `Dual.eval`
* inferring `Fact B.Nondegenerate` from `B.IsPerfPair`
I also updated `PointedCone.dual_univ` to demonstrate the usefulness of these additions. Note that I needed to add an import to `Cone/Dual.lean` which somehow imports cardinals. So I needed to remove cardinals from `assert_not_exists`.
---
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[](https://gitpod.io/from-referrer/)
|
t-algebra
new-contributor
large-import
label:t-algebra$ |
84/16 |
Mathlib/Geometry/Convex/Cone/Dual.lean,Mathlib/LinearAlgebra/Dual/Lemmas.lean,Mathlib/LinearAlgebra/PerfectPairing/Basic.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean |
4 |
4 |
['github-actions', 'martinwintermath', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] |
joelriou assignee:joelriou |
101-17787 3 months ago |
104-10287 104 days ago |
13-75766 13 days |
| 36937 |
Yaohua-Leo author:Yaohua-Leo |
feat(Algebra/Jordan): add first linearization lemmas for IsCommJordan |
[](https://gitpod.io/from-referrer/)
AI assistance disclosure: I used AI assistance for CI/debugging and module-structure fixes in this PR. The mathematical content and main lemmas were written by me, with help from @pelicanhere.
This PR adds a new file `Mathlib/Algebra/Jordan/Linearization.lean` containing linearization lemmas for the commutative Jordan identity.
Main declarations:
* `IsCommJordan.four_nsmul_associator_mul_add`
* `IsCommJordan.associator_mul_add`
These lemmas formalize a first linearization of the commutative Jordan identity using `associator`, following McCrimmon, Proposition 1.8.5.
---
I put these lemmas in a separate file because I expect follow-up linearization lemmas to belong naturally in the same place.
I am also happy to rename declarations or move the file if reviewers would prefer. |
t-algebra
new-contributor
awaiting-author
label:t-algebra$ |
60/0 |
Mathlib.lean,Mathlib/Algebra/Jordan/Linearization.lean |
2 |
6 |
['Yaohua-Leo', 'github-actions', 'grunweg', 'ocfnash'] |
ocfnash assignee:ocfnash |
100-26444 3 months ago |
100-26444 100 days ago |
13-10710 13 days |
| 37695 |
Morten-Ness author:Morten-Ness |
refactor(GroupTheory/Complement): simplify complement proofs |
Simplifies the proofs of:
- `Subgroup.IsComplement'.symm`
- `Subgroup.isComplement_singleton_left`
- `Subgroup.isComplement_singleton_right`
No API changes.
AI assistance: I used Codex/LLM suggestions as a starting point, then manually checked the proofs, and verified the final version locally.
---
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[](https://gitpod.io/from-referrer/)
|
t-group-theory
new-contributor
awaiting-author
|
15/17 |
Mathlib/GroupTheory/Complement.lean |
1 |
4 |
['github-actions', 'tb65536'] |
tb65536 assignee:tb65536 |
96-34618 3 months ago |
96-34618 96 days ago |
0-68801 19 hours |
| 37489 |
michael-novak-math author:michael-novak-math |
feat: add the fundamental theorem of plane curves |
We add to the PlaneCurves file created in PR #36731 a classical result in the subject of differential geometry of plane curves: the fundamental theorem of plane curves.
---------
- [ ] depends on: #36731 |
new-contributor
t-differential-geometry
t-analysis
blocked-by-other-PR
|
651/0 |
Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Calculus.lean,Mathlib/Geometry/PlaneCurves.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean,docs/references.bib |
5 |
5 |
['github-actions', 'mathlib-dependent-issues', 'michael-novak-math'] |
nobody |
96-25198 3 months ago |
102-10054 102 days ago |
0-13581 3 hours |
| 37111 |
tannerduve author:tannerduve |
feat(Computability): add Nat.PrimrecIn and PrimrecIn |
- Add `Nat.PrimrecIn`: primitive recursive functions relative to a set of oracles
- Add `PrimrecIn`: lifts `Nat.PrimrecIn` to `Primcodable` types
A `PrimrecIn` version of `RecursiveIn.iff_nat` (i.e., `PrimrecIn O (f : ℕ → ℕ) ↔ Nat.PrimrecIn O f`) is left as future work as it requires proving `Nat.PrimrecIn O Nat.pred`, which needs additional API for `Nat.PrimrecIn`.
---
Split out from #34937 as requested in review.
- [x] depends on: #37061 |
t-computability
new-contributor
awaiting-author
|
24/0 |
Mathlib/Computability/RecursiveIn.lean |
1 |
14 |
['Komyyy', 'bryangingechen', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'tannerduve'] |
nobody |
92-78722 3 months ago |
94-5181 94 days ago |
1-79421 1 day |
| 37954 |
jdhart81 author:jdhart81 |
feat(Data/ENNReal/Inv): add ENNReal.div_mul_div_cancel |
Proves a / b * (b / c) = a / c for b ≠ 0, b ≠ ∞ in ENNReal. Proof via mul_div_assoc and existing div_mul_cancel.
AI Disclosure: This PR was developed with assistance from an LLM (Claude, Anthropic) for proof exploration and text drafting. The proof was compiled and verified locally by the contributor, who understands the mathematical content. This lemma is extracted from a larger formalization of information-theoretic bounds (Zenodo DOI: 10.5281/zenodo.19317983).
---
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[](https://gitpod.io/from-referrer/)
|
t-data
new-contributor
|
5/0 |
Mathlib/Data/ENNReal/Inv.lean |
1 |
2 |
['github-actions'] |
nobody |
91-15181 3 months ago |
91-15179 91 days ago |
0-75 1 minute |
| 35662 |
FrankieeW author:FrankieeW |
feat(NumberTheory/Zsqrtd): add Archimedean instance via le_arch |
This PR follows a suggestion made in #35606 , #35481
- add `Zsqrtd.le_arch_smul` in `Mathlib/NumberTheory/Zsqrtd/Basic.lean`
- use it to provide `instance : Archimedean (ℤ√d)` in the `Nonsquare` section
- refactor the proof using symmetry to reduce duplication while keeping checks clean
---
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[](https://gitpod.io/from-referrer/)
|
t-number-theory
new-contributor
awaiting-author
merge-conflict
LLM-generated
|
46/4 |
Mathlib/NumberTheory/PellMatiyasevic.lean,Mathlib/NumberTheory/Zsqrtd/Basic.lean |
2 |
13 |
['FrankieeW', 'MichaelStollBayreuth', 'euprunin', 'github-actions', 'mathlib-merge-conflicts', 'tb65536'] |
MichaelStollBayreuth assignee:MichaelStollBayreuth |
90-5913 2 months ago |
124-18896 124 days ago |
15-50831 15 days |
| 33032 |
ksenono author:ksenono |
feat(Combinatorics/SimpleGraph): Konig’s theorem on bipartite graphs |
---
<!-- Your PR title will become the first line of the commit message.
Three additions:
* Combinatorics/SimpleGraph/Konig/Auxillary.lean
* Combinatorics/SimpleGraph/Konig/KonigFin.lean
* Combinatorics/SimpleGraph/Konig/Konig.lean
(all other changes are rebased from the PRs below)
- [ ] depends on: #30129
- [ ] depends on: #32552
- [ ] depends on: #32555
- [ ] depends on: #32570
-->
[](https://gitpod.io/from-referrer/)
|
t-combinatorics
new-contributor
blocked-by-other-PR
merge-conflict
|
832/251 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/Konig/Auxillary.lean,Mathlib/Combinatorics/SimpleGraph/Konig/Konig.lean,Mathlib/Combinatorics/SimpleGraph/Konig/KonigFin.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/VertexCover.lean,Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Cardinal/Basic.lean |
12 |
9 |
['SnirBroshi', 'github-actions', 'ksenono', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vlad902'] |
nobody |
89-66875 2 months ago |
206-39763 206 days ago |
0-136 2 minutes |
| 33330 |
michael-novak-math author:michael-novak-math |
feat: add arc-length reparametrization of parametrized curves |
add new definitions of arc-length reparametrization and its corresponding parameter transformation and a theorem establishing the desired properties. |
t-analysis
new-contributor
awaiting-author
|
308/0 |
Mathlib.lean,Mathlib/Analysis/Calculus/ArcLengthReparametrization.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean,docs/references.bib |
4 |
57 |
['SnirBroshi', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'michael-novak-math'] |
j-loreaux assignee:j-loreaux |
87-21957 2 months ago |
110-36724 110 days ago |
6-70192 6 days |
| 33217 |
Blackfeather007 author:Blackfeather007 |
feat(Algebra): define associated graded structure for abelian group |
In this PR we define the associated graded structure for abelian group when given a filtration and only give some basic lemmas about it.
---
migrated from https://github.com/leanprover-community/mathlib4/pull/26857
|
new-contributor
t-ring-theory
awaiting-author
|
144/0 |
Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean |
2 |
13 |
['Blackfeather007', 'chrisflav', 'erdOne', 'eric-wieser', 'github-actions', 'urkud'] |
erdOne assignee:erdOne |
87-11452 2 months ago |
196-77270 196 days ago |
4-57005 4 days |
| 37938 |
SamuelSchlesinger author:SamuelSchlesinger |
feat(Probability/Posterior): Posterior PMFs and Various Lemmas |
Upstreaming the probability lemmas needed in https://github.com/leanprover/cslib/pull/464. |
t-measure-probability
new-contributor
awaiting-author
|
130/0 |
Mathlib.lean,Mathlib/Probability/ProbabilityMassFunction/Posterior.lean |
2 |
6 |
['EtienneC30', 'SamuelSchlesinger', 'github-actions'] |
RemyDegenne assignee:RemyDegenne |
86-71951 2 months ago |
88-18995 88 days ago |
0-4089 1 hour |
| 38139 |
sidbedi author:sidbedi |
chore(Algebra/MvPolynomial/Variables): golf MvPolynomial.vars_0 to rfl |
---
The classical qualifier and explicit rewrite chain are unnecessary — the result holds definitionally.
[](https://gitpod.io/from-referrer/)
|
new-contributor
t-algebra
awaiting-author
label:t-algebra$ |
1/2 |
Mathlib/Algebra/MvPolynomial/Variables.lean |
1 |
3 |
['github-actions', 'grunweg'] |
nobody |
86-30011 2 months ago |
86-30011 86 days ago |
0-34567 9 hours |
| 38140 |
sidbedi author:sidbedi |
chore(Data/Analysis/Filter): golf CFilter.ofEquiv_val to rfl |
---
cases F is unnecessary, the result holds definitionally.
[](https://gitpod.io/from-referrer/)
|
t-data
new-contributor
awaiting-author
|
1/2 |
Mathlib/Data/Analysis/Filter.lean |
1 |
3 |
['github-actions', 'grunweg'] |
nobody |
86-29967 2 months ago |
86-29967 86 days ago |
0-34488 9 hours |
| 38053 |
ntapiam author:ntapiam |
feat(Analysis/Controls): add Control functions |
Add Control functions
----
This PR adds Control functions in the sense of rough paths theory (see e.g. [Friz-Victoir, Section 1.2.1](https://page.math.tu-berlin.de/~friz/master4_May6th.pdf)).
They are related to p-variation norms which are the goal of #38055.
I've shown most results in the above reference though those relating to 1-variation are still a work in progress.
I had to add a few statements about convex functions in order to work over NNReal instead or Real, but I am not sure this is the best way to do it. The reason is that I've defined controls as taking values in NNReal (as they should).
In particular there is
```lean4
theorem nnreal_of_real {f : ℝ≥0 → ℝ≥0}
(hf : ConvexOn ℝ (Set.Ici 0) fun x : ℝ => (f x.toNNReal : ℝ)) : ConvexOn ℝ≥0 ⊤ f
```
which I didn't know where to put. It probably holds in more generality but I didn't check.
I have also included two versions of Controls, one global and one restricted to a set. I tried to follow Mathlib conventions as best as I could but perhaps that could be improved as well.
<!-- Your PR title will become the first line of the commit message.
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[](https://gitpod.io/from-referrer/)
|
WIP
t-analysis
new-contributor
|
571/1 |
Mathlib.lean,Mathlib/Analysis/Controls/BoundedVariation.lean,Mathlib/Analysis/Controls/ControlOn.lean,Mathlib/Analysis/Controls/Defs.lean,Mathlib/Analysis/Convex/Function.lean,docs/references.bib |
6 |
4 |
['github-actions', 'ntapiam'] |
nobody |
83-24464 2 months ago |
88-76047 88 days ago |
0-52 52 seconds |
| 36853 |
matthunz author:matthunz |
feat(CategoryTheory/Monoidal/Braded/Traced): add `TracedCategory` class |
Adds a `TracedCategory` class following [A. Joyal and R. Street and D. R. Verity, *Traced monoidal categories*](https://www.cambridge.org/core/journals/mathematical-proceedings-of-the-cambridge-philosophical-society/article/abs/traced-monoidal-categories/2BE85628D269D9FABAB41B6364E117C8#article):
```lean
/-- A traced symmetric monoidal category. -/
class TracedCategory
(C : Type u)
[Category.{v} C]
[MonoidalCategory.{v} C]
[SymmetricCategory.{v} C] where
/-- The trace operator. -/
trace : ∀ {A B : C} (W : C), (A ⊗ W ⟶ B ⊗ W) → (A ⟶ B)
/-- Left tightening: sliding a morphism past the trace on the left. -/
trace_naturality_left : ∀ {A A' B : C} (W : C) (f : A' ⟶ A) (g : A ⊗ W ⟶ B ⊗ W),
trace W (f ▷ W ≫ g) = f ≫ trace W g := by cat_disch
/-- Right tightening: sliding a morphism past the trace on the right. -/
trace_naturality_right : ∀ {A B B' : C} (W : C) (f : A ⊗ W ⟶ B ⊗ W) (g : B ⟶ B'),
trace W (f ≫ g ▷ W) = trace W f ≫ g := by cat_disch
/-- Sliding: an endomorphism on the feedback wire slides past the trace. -/
trace_dinaturality : ∀ {A B W : C} (f : A ⊗ W ⟶ B ⊗ W) (h : W ⟶ W),
trace W (f ≫ B ◁ h) = trace W (A ◁ h ≫ f) := by cat_disch
/-- Superposing: trace commutes with left tensoring by a bystander object. -/
trace_superposing : ∀ {A B : C} (C' W : C) (f : A ⊗ W ⟶ B ⊗ W),
C' ◁ trace W f = trace W ((α_ C' A W).hom ≫ C' ◁ f ≫ (α_ C' B W).inv) := by cat_disch
/-- Vanishing I: trace over the tensor unit is the morphism itself (up to unitors). -/
trace_vanishing_one : ∀ {A B : C} (f : A ⊗ 𝟙_ C ⟶ B ⊗ 𝟙_ C),
trace (𝟙_ C) f = (ρ_ A).inv ≫ f ≫ (ρ_ B).hom := by cat_disch
/-- Vanishing II: trace over a tensor product equals iterated trace. -/
trace_vanishing_two : ∀ {A B X Y : C} (f : A ⊗ (X ⊗ Y) ⟶ B ⊗ (X ⊗ Y)),
trace (X ⊗ Y) f = trace X (trace Y ((α_ A X Y).hom ≫ f ≫ (α_ B X Y).inv)) := by cat_disch
/-- Yanking: the trace of the braiding is the identity. -/
trace_yanking : ∀ (W : C), trace W (β_ W W).hom = 𝟙 W := by cat_disch
```
## Motivation
`TracedCategory` can be used for denoting things like electric circuits, which require a traced symmetric monoidal category for the wire graph network.
## Future work
- `instance [CompactClosedCategory C] : TracedCategory C`
- possible notation such as `Tr_[W] f`
---
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[](https://gitpod.io/from-referrer/)
|
t-category-theory
new-contributor
awaiting-author
merge-conflict
|
237/0 |
Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Braided/Traced.lean,Mathlib/CategoryTheory/Monoidal/Rigid/Traced.lean,docs/references.bib |
4 |
5 |
['dagurtomas', 'github-actions', 'mathlib-merge-conflicts', 'matthunz'] |
nobody |
79-4465 2 months ago |
114-80428 114 days ago |
0-25956 7 hours |
| 36313 |
SproutSeeds author:SproutSeeds |
feat(Inversion): cobounded tendsto near center |
Part of #5939
Add `tendsto_inversion_nhdsNE_center_cobounded` in `Mathlib/Geometry/Euclidean/Inversion/Basic.lean`, proving `Tendsto (inversion c R) (𝓝[≠] c) (Bornology.cobounded P)` for `R ≠ 0`.
Tools used: Codex 5.3 extra high
---
Happy to adjust naming, placement, or proof style based on maintainer preference.
|
t-euclidean-geometry
new-contributor
LLM-generated
awaiting-author
|
28/0 |
Mathlib/Geometry/Euclidean/Inversion/Basic.lean |
1 |
11 |
['SproutSeeds', 'euprunin', 'github-actions', 'jsm28', 'kbuzzard', 'ocfnash'] |
jsm28 assignee:jsm28 |
78-46172 2 months ago |
110-27023 110 days ago |
6-36700 6 days |
| 36850 |
whocares-abt author:whocares-abt |
feat(Combinatorics/SimpleGraph/Acyclic): deleting leaves from a tree gives a tree |
Added theorem stating Deleting a leaf from a tree produces a tree. |
t-combinatorics
new-contributor
awaiting-author
|
5/0 |
Mathlib/Combinatorics/SimpleGraph/Acyclic.lean |
1 |
9 |
['YaelDillies', 'github-actions', 'vlad902'] |
YaelDillies assignee:YaelDillies |
76-35743 2 months ago |
76-35853 76 days ago |
38-73648 38 days |
| 26300 |
igorkhavkine author:igorkhavkine |
feat(Analysis/Calculus/FDeriv): continuous differentiability from continuous partial derivatives on an open domain in a product space |
If a function `f : E × F → G` is continuously differentiable, then its partial derivatives along `E` and `F` are also continuous. The non-trivial converse implication holds when the partial derivatives are continuous on an open domain, and they can be added together to give the total derivative of `f`. See this [#mathlib4 > Partial derivatives @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Partial.20derivatives/near/520995477) and the containing thread for some discussion. The PR creates a new import (`Mathlib.Analysis.Calculus.FDeriv.Partial`), where other results about partial derivatives could go in the future.
---
*this is the migration of #25304 to the PR-from-fork workflow*
- [x] depends on: #25564
- [x] depends on: #26273
[](https://gitpod.io/from-referrer/)
|
WIP
new-contributor
awaiting-author
t-analysis
|
347/4 |
Mathlib/Analysis/Calculus/FDeriv/Partial.lean |
1 |
23 |
['YaelDillies', 'agjftucker', 'github-actions', 'igorkhavkine', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] |
sgouezel assignee:sgouezel |
76-32067 2 months ago |
332-519 332 days ago |
44-77030 44 days |
| 37774 |
weisbrja author:weisbrja |
fix: change variables in `bicompl` to `Sort*` and add missing theorem mentioned in `bicompl` docs |
[#mathlib4 > Why does Mathlib use Type* instead of Sort* in some places?](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Why.20does.20Mathlib.20use.20Type.2A.20instead.20of.20Sort.2A.20in.20some.20places.3F/with/583882342)
---
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|
new-contributor
t-logic
merge-conflict
|
6/1 |
Mathlib/Logic/Function/Basic.lean |
1 |
8 |
['github-actions', 'kbuzzard', 'leanprover-radar', 'mathlib-merge-conflicts', 'weisbrja'] |
nobody |
75-85270 2 months ago |
75-85271 75 days ago |
19-76858 19 days |
| 31670 |
edwin1729 author:edwin1729 |
feat(Topology/Order): Scott Topology is Sober over Algebraic DCPO |
---
[Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.3E.20Algebraic.20complete.20partial.20order.20and.20domain.20theory/with/536359313) here
(2/2) PR to prove result in Stone Duality. Here we prove that Scott Topologies over Algebraic DCPOs are sober.
- [ ] depends on: #31662
<!-- The text above the `---` will become the commit message when your
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[](https://gitpod.io/from-referrer/)
|
t-topology
blocked-by-other-PR
new-contributor
merge-conflict
|
456/1 |
Mathlib.lean,Mathlib/Topology/Order/ScottTopology.lean,Mathlib/Topology/Order/ScottTopologyDCPO.lean,docs/references.bib |
4 |
5 |
['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
75-71659 2 months ago |
unknown |
0-0 0 seconds |
| 37445 |
edwin1729 author:edwin1729 |
feat(Topology/Order): set of compact elements, generating basic opens contained in a `Locale.PT`, is directed |
This is (2/4) PRs culminating in a proof that "Scott Topologies over Algebraic DCPOs are Sober". In this PR we prove properties of a certain set of compact elements, w.r.t a `Locale.PT`.
A `Locale.PT` can be thought of as a set of `Opens`. Precisely it is a Frame homomorphism from `Opens _` to `Prop` so we are essentially choosing certain `Opens` to form our set and this set has additional properties. Namely it is a completely prime filter: if the supremum of some Opens is contained than atleast one of the Opens must be contained.
Take some `Locale.PT`, `x`. In this PR, we prove that the set of compact elements generating basic opens (compact elements generate topological basis see #31662) contained in `x` is directed.
This set of compact elements defined above is important in subsequent parts of the proof since it fully determines `x`.
- [ ] depends on: #31662
---
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[](https://gitpod.io/from-referrer/)
|
t-topology
blocked-by-other-PR
new-contributor
merge-conflict
|
296/1 |
Mathlib.lean,Mathlib/Topology/Order/ScottTopology.lean,Mathlib/Topology/Order/ScottTopologyDCPO.lean,docs/references.bib |
4 |
4 |
['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
75-68192 2 months ago |
103-6270 103 days ago |
0-463 7 minutes |
| 37556 |
edwin1729 author:edwin1729 |
feat(Topology/Order): Locale.localePointOfSpacePoint if we have a Scott Topology from an Algebraic DCPO |
(3/4) in a series of PRs proving that "Scott Topologies over Algebraic DCPOs are Sober"
We prove here that the unit of the adjunction from `TopCat` to `Locale` defined in `Topology/Order/Category/FrameAdjunction.lean` is a surjective mapping, under the following condition:
The underlying TopologicalSpace must be a Scott Topology generated with an underlying Algebraic DCPO structure.
- [ ] depends on: #37445
---
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[](https://gitpod.io/from-referrer/)
|
t-topology
new-contributor
blocked-by-other-PR
merge-conflict
|
393/1 |
Mathlib.lean,Mathlib/Topology/Order/ScottTopology.lean,Mathlib/Topology/Order/ScottTopologyDCPO.lean,docs/references.bib |
4 |
5 |
['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
75-68191 2 months ago |
101-6291 101 days ago |
0-1300 21 minutes |
| 38560 |
Deicyde author:Deicyde |
feat(Geometry/Manifold): `MfldCat` is a `CartesianMonoidalCategory` |
We prove that the category `MfldCat` of C^n manifolds is a Cartesian monoidal category, and also derive the `BraidedCategory` instance. This PR introduces a new file `Geometry/Manifold/Category/MfldCat/CartesianMonoidal` closely mirroring the structure of `Algebra/Category/Grp/CartesianMonoidal.lean`
---
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- [ ] depends on: #38223
[](https://gitpod.io/from-referrer/)
|
t-differential-geometry
blocked-by-other-PR
new-contributor
|
281/0 |
Mathlib.lean,Mathlib/Geometry/Manifold/Category/MfldCat/Basic.lean,Mathlib/Geometry/Manifold/Category/MfldCat/CartesianMonoidal.lean,Mathlib/Geometry/Manifold/ContMDiffMap.lean |
4 |
3 |
['github-actions', 'mathlib-dependent-issues'] |
nobody |
75-41437 2 months ago |
unknown |
0-0 0 seconds |
| 37814 |
sglasman author:sglasman |
feat: Equivalence between HopfAlgCat R and Hopf (ModuleCat R) |
This PR resolves a TODO by demonstrating an equivalence of categories between two models of the category of Hopf algebras over a commutative ring R, that of Hopf objects in the module category of R and that of types with a `HopfAlgebra R` instance.
---
AI declaration: I consulted with Claude on proof strategies. The proofs were ultimately written by me.
|
new-contributor
large-import
t-category-theory
WIP
|
214/4 |
Mathlib/CategoryTheory/Monoidal/Hopf_.lean,Mathlib/RingTheory/HopfAlgebra/Basic.lean |
2 |
5 |
['dagurtomas', 'github-actions', 'robin-carlier', 'sglasman'] |
kim-em assignee:kim-em |
74-45955 2 months ago |
80-8418 80 days ago |
14-69757 14 days |
| 33478 |
anishrajeev author:anishrajeev |
feat(ModelTheory): define a subset of the topology over complete types |
Define a subset of the Stone Space over a language expanded with countably many constants. Define the proposition to indicate if a language is countable. The subset's density and openness is a future goal to prove (have a branch where it is almost finished), in pursuit of formalizing the proof of the Omitting Types Theorem via properties of Baire spaces.
- [ ] depends on: #32215
- [ ] depends on: #32546 |
t-logic
merge-conflict
new-contributor
|
160/1 |
Mathlib.lean,Mathlib/ModelTheory/Topology/Types.lean,Mathlib/ModelTheory/Types.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean |
4 |
8 |
['NoneMore', 'anishrajeev', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'tb65536'] |
nobody |
74-5795 2 months ago |
181-19336 181 days ago |
10-38484 10 days |
| 33431 |
gululu996-ui author:gululu996-ui |
feat(Combinatorics/SimpleGraph/Bipartite): characterize bipartite simple graphs by even cycles |
Add the classical characterization of bipartite simple graphs: a simple graph is bipartite if and only if every cycle has even length.
Previously, mathlib has the definition of `IsBipartite` for `SimpleGraph` and various lemmas about bipartite graphs, but it does not provide this equivalence in a single theorem, so users have to reprove or reassemble it from existing results.
Prove the forward direction by showing a 2-coloring alternates along any walk, so every cycle must have even length. Prove the converse by showing that if an odd cycle exists then no bipartition is possible, hence if all cycles are even the graph admits a bipartition.
|
new-contributor
t-combinatorics
awaiting-author
merge-conflict
|
186/1 |
Mathlib/Combinatorics/SimpleGraph/Bipartite.lean |
1 |
6 |
['NickAdfor', 'github-actions', 'jcommelin', 'mathlib-merge-conflicts'] |
kmill assignee:kmill |
73-76393 2 months ago |
163-18636 163 days ago |
26-1427 26 days |
| 34940 |
michaellee94 author:michaellee94 |
feat: the graph of a continuous function on a $C^n$ manifold is a $C^n$ manifold |
---
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using the following format:
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-->
[](https://gitpod.io/from-referrer/)
|
t-differential-geometry
new-contributor
awaiting-author
merge-conflict
|
536/0 |
Mathlib.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Geometry/Manifold/Instances/Graph.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Topology/Constructions/Graph.lean |
5 |
80 |
['botbaki-review', 'github-actions', 'grunweg', 'mathlib-merge-conflicts', 'michaellee94', 'ocfnash'] |
ocfnash assignee:ocfnash |
73-75111 2 months ago |
130-76193 130 days ago |
15-3231 15 days |
| 35193 |
Brian-Nugent author:Brian-Nugent |
feat(Topology/Closeds): implement category of closed sets in topological spaces |
I copied over the nice API for working with `TopologicalSpace.Opens` as a category over for `TopologicalSpace.Closeds`. The only thing that did not immediately transfer was `Topology.IsInducing.functorObj` so I omitted it.
Based on work of @kim-em
---
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|
t-topology
new-contributor
please-adopt
merge-conflict
|
352/6 |
Mathlib.lean,Mathlib/Topology/Category/TopCat/Closeds.lean,Mathlib/Topology/Category/TopCat/Opens.lean |
3 |
24 |
['Brian-Nugent', 'dagurtomas', 'github-actions', 'mathlib-merge-conflicts'] |
dagurtomas assignee:dagurtomas |
73-74986 2 months ago |
114-9099 114 days ago |
17-63465 17 days |
| 36387 |
FrankieeW author:FrankieeW |
feat(NumberTheory/QuadraticField): parameter uniqueness for quadratic fields |
## Summary
Prove that every quadratic field `ℚ(√d)` can be normalized to have a squarefree integer parameter, and that this parameter is unique.
## Main Results
- `Qsqrtd.rescale`: rescaling isomorphism `ℚ(√d) ≃ₐ[ℚ] ℚ(√(a²d))` for `a ≠ 0`
- `Qsqrtd_iso_int_param`: every `ℚ(√d)` is isomorphic to one with an integer parameter
- `Qsqrtd_iso_squarefree_int_param`: every `ℚ(√d)` is isomorphic to one with a squarefree integer parameter
- `Qsqrtd.param_unique`: if `ℚ(√d₁) ≃ₐ[ℚ] ℚ(√d₂)` with both `d₁, d₂` squarefree and `≠ 1`, then `d₁ = d₂`
## Helper Lemmas
- `squarefree_eq_of_rat_sq_mul`: if `d₁ = d₂ · r²` with both squarefree, then `d₁ = d₂`
- `int_dvd_of_ratio_square`: if `d₁/d₂` is a rational square and `d₂` is squarefree, then `d₂ ∣ d₁`
- `not_isSquare_neg_one_rat`: `-1` is not a square in `ℚ`
---
- [ ] depends on: #36347 |
WIP
t-number-theory
blocked-by-other-PR
new-contributor
large-import
LLM-generated
|
400/0 |
Mathlib.lean,Mathlib/Algebra/QuadraticAlgebra/Defs.lean,Mathlib/Algebra/Squarefree/Basic.lean,Mathlib/NumberTheory/QuadraticField/Basic.lean |
4 |
4 |
['FrankieeW', 'github-actions', 'mathlib-dependent-issues'] |
nobody |
72-6449 2 months ago |
125-50701 125 days ago |
0-2 2 seconds |
| 35755 |
Vilin97 author:Vilin97 |
feat(Analysis/ODE): forward Euler method convergence |
WIP
Prove the convergence of the Forward Euler Method. This is the first theorem in most textbooks on numerical analysis for ODEs.
---
The initial proof was produced by [Aristotle](https://aristotle.harmonic.fun). The code was then iteratively refined (factoring out lemmas, golfing, simplifying proofs) using Claude Code (Claude Opus 4.6).
* [ ] depends on: #35753 |
new-contributor
WIP
LLM-generated
merge-conflict
|
404/0 |
Mathlib.lean,Mathlib/Analysis/ODE/EulerMethod.lean,Mathlib/Topology/Algebra/Order/PiecewiseLinear.lean |
3 |
7 |
['Vilin97', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
71-77110 2 months ago |
137-36721 137 days ago |
0-674 11 minutes |
| 36347 |
FrankieeW author:FrankieeW |
feat(NumberTheory/QuadraticField): define quadratic number fields as QuadraticAlgebra ℚ d 0 |
Define `Qsqrtd d` as `QuadraticAlgebra ℚ d 0`, representing the quadratic number field `ℚ(√d)`. Prove trace and norm results, show `Qsqrtd d` is a number field and a quadratic extension when `d` is not a perfect square, and prove that `ℚ(√0)` and `ℚ(√1)` are not fields. Include `IsQuadraticField` as a predicate for quadratic extensions of `ℚ`, and bridge lemmas connecting squarefree integer parameters to the non-square condition.
This PR is part of a series upstreaming the [QuadraticNumberFields](https://github.com/FrankieeW/QuadraticNumberFields) project.
[Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/quadratic.20number.20fields)
---
### PRs
- #36347 （this PR）
- #36387
---
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t-number-theory
new-contributor
large-import
awaiting-author
LLM-generated
|
191/0 |
Mathlib.lean,Mathlib/Algebra/QuadraticAlgebra/Defs.lean,Mathlib/Algebra/Squarefree/Basic.lean,Mathlib/NumberTheory/QuadraticField/Basic.lean |
4 |
29 |
['FrankieeW', 'eric-wieser', 'github-actions', 'riccardobrasca', 'tb65536', 'wwylele'] |
tb65536 assignee:tb65536 |
71-72430 2 months ago |
118-13069 118 days ago |
7-10039 7 days |
| 38316 |
tannerduve author:tannerduve |
feat(Order/OmegaCompletePartialOrder): least fixed point and Scott induction |
Adds `ContinuousHom.lfp` for endomorphisms on an ωCPO with `⊥`, as the `ωSup` of the iterate chain from `⊥`, together with `map_lfp`, `isFixedPt_lfp`, `lfp_le_fixed`, `isLeast_lfp`, and the Scott induction theorem `lfp_induction` (specialized from a more general seed-based `ωSup_iterate_induction`).
For `Part.fix`, adds:
* `Part.exists_mem_approx_of_mem_fix`: if `y ∈ Part.fix g x`, some finite approximation of `g` already contains `y`.
* `Part.Fix.approx_eq_iterate_bot` and `Part.Fix.approxChain_eq_iterateChain`: bridges between `Fix.approx`/`approxChain` and `f^[n] ⊥`/`iterateChain`.
* `Part.fix_eq_lfp`: `Part.fix g = ContinuousHom.lfp (.ofFun g hc)` when `g` is ω-Scott continuous.
* `Part.fix_scott_induction`: Scott induction specialized to `Part.fix`.
* `Part.fix_induction_mem`: membership induction on `Part.fix`, derived from `fix_scott_induction`. |
new-contributor |
114/0 |
Mathlib/Control/LawfulFix.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,docs/references.bib |
3 |
2 |
['github-actions'] |
nobody |
71-1064 2 months ago |
82-63566 82 days ago |
82-63742 82 days |
| 32880 |
0xTerencePrime author:0xTerencePrime |
feat(Analysis/Asymptotics): define subpolynomial growth |
## Main definitions
* `Asymptotics.IsSubpolynomial l f g`: A function `f` has subpolynomial growth with respect to `g` along filter `l` if `f = O(1 + ‖g‖^k)` for some natural `k`.
## Main results
* `IsSubpolynomial.const`: Constant functions have subpolynomial growth
* `IsSubpolynomial.id`: Identity has subpolynomial growth
* `IsSubpolynomial.add`: Closure under addition
* `IsSubpolynomial.neg`: Closure under negation
* `IsSubpolynomial.sub`: Closure under subtraction
* `IsSubpolynomial.mul`: Closure under multiplication
* `IsSubpolynomial.pow`: Closure under powers
* `isSubpolynomial_iff_one_add`: Equivalence with `(1 + ‖g‖)^k` formulation
* `IsSubpolynomial.uniform`: Uniform bounds for finite families
## Implementation notes
The definition uses `1 + ‖g‖^k` rather than `(1 + ‖g‖)^k` as the primary form, with the equivalence established in `isSubpolynomial_iff_one_add`. Four private auxiliary lemmas handle the key inequalities needed for closure proofs.
Closes #32658
|
awaiting-author
t-analysis
new-contributor
|
184/0 |
Mathlib.lean,Mathlib/Analysis/Asymptotics/Subpolynomial.lean |
2 |
29 |
['0xTerencePrime', 'ADedecker', 'github-actions', 'j-loreaux'] |
ADedecker assignee:ADedecker |
70-32366 2 months ago |
180-84337 180 days ago |
22-22665 22 days |
| 38750 |
openendings author:openendings |
feat(Data/Nat): add padicValNat_add_eq_min |
Add lemmas for `padicValNat` mirroring the [e]multiplicity API, including
- padicValNat_eq_of_dvd_of_not_dvd
- padicValNat_add_of_gt
- padicValNat_add_eq_min
---
[](https://gitpod.io/from-referrer/)
|
t-data
new-contributor
awaiting-author
|
36/0 |
Mathlib/Data/Nat/MaxPowDiv.lean |
1 |
7 |
['Ruben-VandeVelde', 'github-actions', 'openendings'] |
nobody |
69-38808 2 months ago |
69-64304 69 days ago |
3-62762 3 days |
| 38170 |
maddycrim author:maddycrim |
feat(Algebra/Module/FinitePresentation): Finitely Presented Module Lemma |
From FLT Project
Main Definitions:
`Module.FinitePresentation.exists_fin_exact` : A finitely presented module M admits an exact sequence F' -> F -> M -> 0 where F' and F are finite free modules.
---
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[](https://gitpod.io/from-referrer/)
|
t-algebra
new-contributor
awaiting-author
label:t-algebra$ |
9/0 |
Mathlib/Algebra/Module/FinitePresentation.lean |
1 |
17 |
['chrisflav', 'github-actions', 'maddycrim', 'themathqueen', 'vlad902'] |
nobody |
68-37139 2 months ago |
68-37139 68 days ago |
17-43852 17 days |
| 36896 |
PieterCuijpers author:PieterCuijpers |
feat (Algebra/Order/Quantale): isMulLeftsided, isMulRightsided, isMulTwosided and strict versions |
* Adding definitions of quantale elements being leftsided, rightsided, and twosided, and strict versions
Should we include these definitions in the main Algebra/Order/Quantale.lean file, or start a separate file for them?
I have a few basic theorems I would like to include on these notions, but invite suggestions.
---
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[](https://gitpod.io/from-referrer/)
|
t-algebra
new-contributor
awaiting-author
label:t-algebra$ |
81/1 |
Mathlib/Algebra/Order/Quantale.lean |
1 |
5 |
['NoahW314', 'PieterCuijpers', 'chrisflav', 'github-actions'] |
mariainesdff assignee:mariainesdff |
68-18284 2 months ago |
75-10539 75 days ago |
39-18222 39 days |
| 38960 |
ajhendel author:ajhendel |
chore: remove ℕ+ interval_cases workaround in ADEInequality |
`interval_cases` now supports `ℕ+`, so the manual `Finset.mem_Iio`/`Finset.mem_Ico` + `conv` + `fin_cases` workaround (marked with a porting note) is no longer needed.
Replaces three 3-4 line workaround blocks with `interval_cases p`/`q`/`r`. |
t-number-theory
new-contributor
awaiting-CI
|
3/10 |
Mathlib/NumberTheory/ADEInequality.lean |
1 |
2 |
['github-actions'] |
nobody |
67-20835 2 months ago |
68-21767 68 days ago |
0-105 1 minute |
| 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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[](https://gitpod.io/from-referrer/)
|
new-contributor
awaiting-zulip
t-measure-probability
awaiting-author
|
4/0 |
Mathlib/MeasureTheory/Constructions/Polish/Basic.lean |
1 |
10 |
['ADedecker', 'LTolDe', 'dagurtomas', 'dupuisf', 'github-actions', 'jcommelin'] |
PatrickMassot assignee:PatrickMassot |
65-78430 2 months ago |
187-11431 187 days ago |
11-7507 11 days |
| 39108 |
idontgetoutmuch author:idontgetoutmuch |
feat(Geometry/Manifold/GroupLieAlgebra): Add mfderiv_mul_left_mul and left-translate for integral curves |
Add the following:
`mfderiv_mul_left_mul`: the derivative of left-multiplication satisfies a chain rule:
$$d(L_{g \cdot h})_x = d(L_g)_{h \cdot x} \circ d(L_h)_x$$
`mulInvariantVectorField_mul`: the vector field at the translated point is the push forward of the vector field:
$$V(g \cdot h) = d(L_g)_h(V(h))$$
`IsMIntegralCurve.left_translate`: using these, if $\gamma$ is an integral curve of $V$, then so is $t \mapsto g \bullet \gamma(t)$ for any $g \in G$, since:
$$\frac{d}{dt}(g \bullet \gamma(t)) = d(L_g)_{\gamma(t)}\left(\frac{d\gamma}{dt}(t)\right) = d(L_g)_{\gamma(t)}(V(\gamma(t))) = V(g \bullet \gamma(t))$$
I argue (*) all the time with LLMs so this PR will certainly have had some input from them. Is that enough of a disclosure?
(*) Like Lewis Carroll:
In my youth said the sage I took to the law and argued each case with wife
And the muscular strength that it gave to my jaw has lasted the rest of my life
|
t-differential-geometry
new-contributor
awaiting-author
LLM-generated
|
73/0 |
Mathlib/Geometry/Manifold/GroupLieAlgebra.lean |
1 |
8 |
['github-actions', 'grunweg'] |
nobody |
64-2006 2 months ago |
64-2071 64 days ago |
0-37992 10 hours |
| 39151 |
anovickis author:anovickis |
feat(Analysis/CStarAlgebra/Matrix): IsTopologicalGroup for specialUnitaryGroup |
Adds `ContinuousInv` and `IsTopologicalGroup` instances for `Matrix.specialUnitaryGroup n 𝕜`.
The unitary group `Matrix.unitaryGroup n α` already inherits these via the `unitaryGroup ≡ unitary R` abbrev + existing instances on `unitary R` (in `Mathlib/Topology/Algebra/Star/Unitary.lean`). However, `specialUnitaryGroup` is the sub-Submonoid `unitaryGroup ⊓ MonoidHom.mker detMonoidHom` — it does not auto-inherit those instances since it is not literally an alias of `unitary R`.
### New declarations
- `instance Matrix.specialUnitaryGroup.instContinuousInv` — proven via `Matrix.star_eq_inv` + `continuous_star`
- `instance Matrix.specialUnitaryGroup.instIsTopologicalGroup` — combining `ContinuousMul` (from Submonoid structure) + `ContinuousInv`
Both placed inside the existing `EntrywiseSupNorm` section in `Mathlib/Analysis/CStarAlgebra/Matrix.lean` (the natural neighborhood for matrix-specific topological structure on (special) unitary groups).
### Motivation
These instances enable using `specialUnitaryGroup` as a topological group in homogeneous-space constructions (e.g., `SU(3) ⧸ T = F₂` flag manifolds). They complement #39146 (CompactSpace instances for the same groups) — together giving the standard 'compact topological group' typeclass set on `specialUnitaryGroup`.
### Verification
\`\`\`lean
example : ContinuousInv (Matrix.specialUnitaryGroup (Fin 3) ℂ) := inferInstance -- now works
example : IsTopologicalGroup (Matrix.specialUnitaryGroup (Fin 3) ℂ) := inferInstance -- now works
\`\`\`
Both fail on master without this PR; both succeed after. |
t-analysis
new-contributor
awaiting-author
|
30/0 |
Mathlib/Analysis/CStarAlgebra/Matrix.lean |
1 |
3 |
['github-actions', 'j-loreaux', 'wwylele'] |
nobody |
62-77530 2 months ago |
62-77530 62 days ago |
0-3921 1 hour |
| 39191 |
m13683320924-hue author:m13683320924-hue |
feat: define Asymptotics.IsSubpolynomial |
This PR defines `Asymptotics.IsSubpolynomial l f g`, meaning that `f` is asymptotically bounded by `1 + ‖g‖ ^ k` for some `k : ℕ`.
It also adds basic closure lemmas for constants, addition, multiplication, and natural powers.
Towards #32658.
The formalization was developed with the help of Doubao-Seed-2.0-code and manually checked in Lean.
---
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[](https://gitpod.io/from-referrer/) |
t-analysis
new-contributor
|
259/0 |
Mathlib.lean,Mathlib/Analysis/Asymptotics/Subpolynomial.lean |
2 |
3 |
['github-actions'] |
nobody |
62-17088 2 months ago |
62-28049 62 days ago |
0-344 5 minutes |
| 34054 |
YellPika author:YellPika |
feat(Order/OmegaCompletePartialOrder): OmegaCompletePartialOrder instance for `Sigma` with basic `ωScottContinuous` lemmas |
This PR adds an `OmegaCompletePartialOrder` instance for `Sigma` along with `ωScottContinuous` lemmas for basic operations (`mk`, `fst`, `snd`). Appropriate lemmas are marked with `@[fun_prop]` so that the `fun_prop` tactic can automatically deduce `ωScottContinuous` proofs for functions involving `Sigma`s.
---
- [x] depends on: #33941
- [x] depends on: #37258
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|
new-contributor
t-order
please-merge-master
awaiting-author
|
231/0 |
Mathlib/Data/Sigma/Order.lean,Mathlib/Order/OmegaCompletePartialOrder.lean |
2 |
29 |
['Vierkantor', 'YellPika', 'github-actions', 'grunweg', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
grunweg assignee:grunweg |
62-11840 2 months ago |
141-79491 141 days ago |
16-66871 16 days |
| 39213 |
m13683320924-hue author:m13683320924-hue |
feat: define maximal cliques and independent sets |
This PR adds explicit predicates for maximal cliques and maximal independent sets:
- `SimpleGraph.IsMaximalClique`
- `SimpleGraph.IsMaximalIndepSet`
It also adds conversion lemmas to and from the existing `Maximal G.IsClique` and `Maximal G.IsIndepSet` formulations, plus basic complement and maximum-to-maximal lemmas.
Towards #34962.
The formalization was developed with the help of Doubao-Seed-2.0-code and manually checked in Lean.
---
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Co-authors in the squash commit are gathered from two sources:
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each co-author among the commits in the pull request. If necessary, you
may create empty commits to indicate co-authorship, using commands like so:
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[](https://gitpod.io/from-referrer/) |
t-combinatorics
new-contributor
LLM-generated
|
60/22 |
Mathlib/Combinatorics/SimpleGraph/Clique.lean |
1 |
3 |
['SnirBroshi', 'github-actions'] |
nobody |
61-82895 2 months ago |
62-4324 62 days ago |
0-389 6 minutes |
| 39165 |
allenhaozhu author:allenhaozhu |
feat(Probability/Moments): add IsSubExponential class |
Add `ProbabilityTheory.IsSubExponential X μ ν b`, the sub-exponential random variable class: `mgf X μ s ≤ exp (s²ν/2)` for `|s| < 1/b`. Mirror the structure of the existing `Mathlib/Probability/Moments/SubGaussian.lean`. Include constructor lemmas (`IsSubExponential.const`, `mono_b`, `mono_nu`) and a tail bound derived through Mathlib's `measure_ge_le_exp_mul_mgf`.
---
## AI-assistance disclosure
Per the Mathlib [AI-use policy](https://leanprover-community.github.io/contribute/index.html#use-of-ai):
- **Tool.** Claude Code (Anthropic) with the Claude Sonnet 4.6 model.
- **Use.** I specified the target lemma statements and the proof strategy; the assistant drafted Lean 4 tactic combinations against current Mathlib. I iterated on the proofs, verified each lemma builds under `lake build` from a clean checkout, and read the final code.
- **Vouching.** I have read every declaration in this file and can defend the proofs without further AI assistance. I welcome reviewer feedback on naming, namespace placement, and stylistic alignment with the surrounding Mathlib modules. |
t-measure-probability
new-contributor
LLM-generated
awaiting-author
|
257/0 |
Mathlib.lean,Mathlib/Probability/Moments/SubExponential.lean |
2 |
4 |
['allenhaozhu', 'github-actions', 'grunweg'] |
nobody |
61-22972 2 months ago |
62-32615 62 days ago |
0-2698 44 minutes |
| 39168 |
allenhaozhu author:allenhaozhu |
feat(Analysis/Convex/Subgradient): add subgradient characterization for |·| and ℓ¹ |
Add `Convex.IsAbsSubgradient x g`, the predicate that `g` is a subgradient of `|·|` at `x`. Prove the standard characterization: the only subgradient at `x > 0` is `1`; at `x < 0` it is `-1`; at `x = 0` the subgradients are exactly `[-1, 1]`. Add `IsL1Subgradient`, the componentwise lift to `Fin n → ℝ` used by ℓ¹-regularized estimation (Lasso KKT).
---
## AI-assistance disclosure
Per the Mathlib [AI-use policy](https://leanprover-community.github.io/contribute/index.html#use-of-ai):
- **Tool.** Claude Code (Anthropic) with the Claude Sonnet 4.6 model.
- **Use.** I specified the target lemma statements and the proof strategy; the assistant drafted Lean 4 tactic combinations against current Mathlib. I iterated on the proofs, verified each lemma builds under `lake build` from a clean checkout, and read the final code.
- **Vouching.** I have read every declaration in this file and can defend the proofs without further AI assistance. I welcome reviewer feedback on naming, namespace placement, and stylistic alignment with the surrounding Mathlib modules. |
t-analysis
new-contributor
LLM-generated
awaiting-author
|
231/0 |
Mathlib.lean,Mathlib/Analysis/Convex/Subgradient/Abs.lean |
2 |
4 |
['allenhaozhu', 'github-actions', 'grunweg'] |
nobody |
61-22970 2 months ago |
62-32700 62 days ago |
0-2608 43 minutes |
| 39279 |
jayscambler author:jayscambler |
feat(Cryptography/Sigma): Schnorr sigma protocol and signature scheme |
Adds `Mathlib/Cryptography/Sigma/Schnorr.lean`. New file in a new top-level directory; mathlib currently has no `Mathlib/Cryptography/`, so I've taken `Mathlib/Cryptography/Sigma/` as the natural home for sigma-protocol formalizations.
The file proves the three defining properties of Schnorr's identification scheme as a sigma protocol:
- `Schnorr.correct`: completeness. Honest verifier accepts honest signer's transcript.
- `Schnorr.specialSoundness`: from two accepting transcripts sharing the commitment but using different challenges `c, c'`, the witness `x = (s - s') / (c - c')` is recovered. Needs `q` prime so `c - c'` is invertible in `ZMod q`.
- `Schnorr.hvzkAccepts`: the HVZK simulator `g^s · (y^c)⁻¹` always yields accepting transcripts. This is the structural-correctness half of HVZK only; the distributional indistinguishability statement is a separate result and not in this PR.
On top of the sigma protocol there's `Schnorr.Signature.{keyGen, sign, verify, correct}` wrapping it as a Fiat-Shamir signature scheme; `Schnorr.Signature.correct` is a one-line corollary of `Schnorr.correct`.
Two auxiliary lemmas, `Schnorr.gpow_sub` and `Schnorr.gpow_mul`, bridge `ZMod q` arithmetic and group exponentiation under `Fintype.card G = q`. They're local to this file for now because the surrounding `gpow` API is itself cryptography-specific; if a general `ZMod q`-graded group action framework lands in mathlib later, both lemmas would become instances of it.
There's also a small `example` instantiating everything on `Multiplicative (ZMod q)` for `Fact q.Prime` to show the API typechecks. That instantiation is a toy (DLOG is trivial in that group), but it confirms the abstraction is usable.
**AI disclosure**: this PR was a collaboration between myself, Grey Haven's autocontext and Claude Opus 4.7 (Anthropic). I read each line and built locally on current master. (strawberry has three r's) |
new-contributor
LLM-generated
|
352/0 |
Mathlib.lean,Mathlib/Cryptography/Sigma/Schnorr.lean |
2 |
2 |
['github-actions'] |
nobody |
60-8811 1 month ago |
60-8890 60 days ago |
60-9030 60 days |
| 31662 |
edwin1729 author:edwin1729 |
feat(Topology/Order): topological basis of scott topology on Complete… |
…PartialOrder
---
[Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.3E.20Algebraic.20complete.20partial.20order.20and.20domain.20theory/with/536359313) for this PR.
(2/5) PRs in domain theory, proving that scott topologies over Algebraic DCPOs (`CompletePartialOrder`) are sober.
The main reference is [Renata, Duality in Domain Theory](https://alyata.github.io/documents/duality_domain_theory.pdf). But the statements can also be found in the canonical text [Abramsky and Jung](https://www.cs.ox.ac.uk/people/samson.abramsky/handbook.pdf)
This first PR proves two prerequisites, namely:
- the specialization order induced by the scott topology corresponds to the existing order of the DCPO. Prop 3.1.5 in [Duality in Domain Theory](https://alyata.github.io/documents/duality_domain_theory.pdf) and Prop 2.3.2(1) in [Abramsky and Jung](https://www.cs.ox.ac.uk/people/samson.abramsky/handbook.pdf)
- the upward closures of compact elements of the DCPO form a topological basis for the Scott Topology. Prop 3.5.2 in [Duality in Domain Theory](https://alyata.github.io/documents/duality_domain_theory.pdf) and Prop 2.3.6(2) in [Abramsky and Jung](https://www.cs.ox.ac.uk/people/samson.abramsky/handbook.pdf)
- [x] depends on: #33061
**The next PR is here:** #31670
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PR is merged. Please leave a blank newline before the `---`, otherwise
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Moves:
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Any other comments you want to keep out of the PR commit should go
below the `---`, and placed outside this HTML comment, or else they
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[](https://gitpod.io/from-referrer/)
|
t-topology
new-contributor
awaiting-author
|
165/1 |
Mathlib.lean,Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/Topology/Order/ScottTopology.lean,Mathlib/Topology/Order/ScottTopologyDCPO.lean,docs/references.bib |
5 |
99 |
['b-mehta', 'edwin1729', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'plp127'] |
b-mehta assignee:b-mehta |
59-85722 1 month ago |
68-758 68 days ago |
64-31147 64 days |
| 39393 |
jayscambler author:jayscambler |
feat(GameTheory): von Neumann minimax theorem for finite matrix games |
Adds `Mathlib/GameTheory/MatrixGame.lean`. Resolves the TODO at
`Mathlib/Topology/Sion.lean:48` ("spell out the particular case of
von Neumann theorem") by specialising
`Sion.exists_isSaddlePointOn` to the bilinear payoff
`∑ i j, x i * M i j * y j` on the pair of standard simplices.
Two theorems:
- `Matrix.exists_saddle_point`: existence of a saddle point in
mathlib's `IsSaddlePointOn` convention (`a` minimiser-in-`X`,
`b` maximiser-in-`Y`).
- `Matrix.exists_mixedNash`: existence of a mixed Nash equilibrium
in the textbook matrix-game orientation (row player maximises,
column player minimises). Proved by applying Sion to `-payoff M`.
Both forms are useful: the first matches mathlib's existing
saddle-point machinery, and the second is the statement most
game-theory texts use directly.
Supporting lemmas: continuity of the payoff in each argument
(linear in each), and quasi-convexity / quasi-concavity from
`LinearMap.convexOn` / `LinearMap.concaveOn`. The simplex
hypotheses for Sion (`Convex`, `IsCompact`, `Nonempty`) come from
existing mathlib lemmas (`convex_stdSimplex`,
`isCompact_stdSimplex`, `single_mem_stdSimplex`).
Creates a new top-level `Mathlib/GameTheory/` directory; mathlib
currently has none. A natural follow-up would be a
`Mathlib/GameTheory/NormalForm.lean` for general n-player
normal-form games and pure Nash equilibrium.
**AI disclosure**: this PR was a collaboration between myself, Grey
Haven's autocontext and Claude Opus 4.7 (Anthropic). I read each
line and built locally on current master. (strawberry has three r's) |
t-topology
new-contributor
LLM-generated
|
216/2 |
Mathlib.lean,Mathlib/GameTheory/MatrixGame.lean,Mathlib/Topology/Sion.lean |
3 |
3 |
['github-actions', 'vihdzp'] |
nobody |
58-41040 1 month ago |
58-74970 58 days ago |
0-355 5 minutes |
| 22925 |
ggranberry author:ggranberry |
feat(Mathlib/PlaceHolder/ToeplitzHausdorff): Toeplitz-Hausdorff |
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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(that is, before the `---`) using the following format:
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[](https://gitpod.io/from-referrer/)
|
WIP
new-contributor
will-close-soon
awaiting-author
help-wanted
t-analysis
|
411/0 |
Mathlib/PlaceHolder/ToeplitzHausdorff.lean,Mathlib/PlaceHolder/ToeplitzHausdorff_v2.lean |
2 |
16 |
['AntoineChambert-Loir', 'faenuccio', 'ggranberry', 'github-actions', 'vihdzp'] |
faenuccio assignee:faenuccio |
58-19567 1 month ago |
482-11076 482 days ago |
3-8649 3 days |
| 39270 |
m13683320924-hue author:m13683320924-hue |
feat: prove strict group homs are stable under Prod.map |
This PR proves that strict group homomorphisms are stable under product maps.
It adds an auxiliary lemma showing that the range restriction of a strict group homomorphism is an open quotient map, and uses it to prove that `MonoidHom.prodMap` preserves `Topology.IsStrictMap`.
Towards #38421.
|
t-topology
new-contributor
|
44/0 |
Mathlib/Topology/Algebra/Group/Basic.lean |
1 |
7 |
['eric-wieser', 'github-actions', 'm13683320924-hue'] |
nobody |
58-3920 1 month ago |
60-79734 60 days ago |
0-1401 23 minutes |
| 37010 |
pion2024 author:pion2024 |
`Sl2`update: add theorem `finrank_weightSpace_eq_one_of_isIrreducible` |
# Background:
I am a 2nd year undergrad student in mathematics currently self-teaching Lie algebra and representation theory.
Before starting the formalization, I searched for related keywords on Zulip and in the GitHub issues and commits. As far as I could tell, there were no existing results or ongoing attempts before I started.
All feedback is welcome. Even a quick check on the statement design/an idea on the generalization (cf Limitations below) would be incredibly helpful.
# Overview
In this PR, I added the new section `IsAlgClosedIrreducible` which formalizes the well-known theorem `finrank_weightSpace_eq_one_of_isIrreducible` for the Lie algebra $\mathfrak{sl}_2$ step by step. It proves that for a finite-dimensional irreducible representation of $\mathfrak{sl}_2$ over an algebraically closed field $K$ of characteristic zero, every non-trivial weight space has a dimension of exactly 1.
# Formalization Structure :
Instead of relying on explicit finite sums (`Finset.sum`) and manipulating coefficients, I heavily leverage Mathlib's abstractions in Submodule Lattice Theory and Coordinate-free Linear Algebra. The formalization proceeds in the following logic:
1. Existence of a Primitive Vector (`exists_primitiveVector`): I construct a primitive (highest-weight) vector by showing that repeated applications of the raising operator $e$ must eventually yield zero due to the finite-dimensionality of $M$ and the linear independence of eigenvectors corresponding to distinct eigenvalues.
2. The span of $f$-Tower as a Lie Submodule equals to the whole space (`fTowerLieSubmodule_eq_top`): I define the $f$-tower submodule as the $K$-span of $\{f^k m \mid k \in \mathbb{N}\}$. By proving its closure under the action of $f, h$, and $e$, I establish it as a Lie submodule. Since $M$ is irreducible, this submodule must be the entire space ($\top$).
3. Submodule Lattice Operations (`exists_mem_fTower_of_weightSpace_ne_bot`): To prove that every weight in $M$ is of the form $\mu_0 - 2k$, I use lattice operations (iSup, inf, and Disjoint) to avoid element-wise tracking. Since the $f$-tower spans $M$, the supremum of its weight spaces is $\top$. By leveraging `Module.End.eigenspaces_iSupIndep`, I show that any arbitrary non-trivial weight space would have a trivial intersection with $\top$ if its weight didn't belong to the sequence, yielding a contradiction.
4. Dimension Calculation via Basis Equivalence (`finrank_weightSpace_eq_one_of_isIrreducible`): Finally, I construct a basis from the non-zero elements of the $f$-tower. To show the weight space is 1-dimensional, I use `Basis.equivFun` to compare coefficients algebraically. This avoids heavy manual indexing and index-shifting, proving that any vector in the weight space $\mu_0 - 2k$ is merely a scalar multiple of $f^k m$.
# Use of AI:
I used Gemini 3.1 Pro for tactics, theorems, improvement suggestions, and error explanations. I fully understand and can vouch for all the modifications I have made to the file.
# Limitations:
I only managed to formalize the finite-dimensional version, although the theorem also holds in the infinite-dimensional case. In the infinite case the existence of a primitive vector is not guaranteed. A quick search suggests that we might need heavy tools like Casimir operators and the universal enveloping algebra, which are totally beyond my current level. I am looking into it, but since there is a significant mathematical gap, I thought it would be best to get this finite-dimensional version merged first. |
new-contributor
t-algebra
large-import
awaiting-author
merge-conflict
label:t-algebra$ |
336/0 |
Mathlib/Algebra/Lie/Sl2.lean |
1 |
11 |
['github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'ocfnash', 'pion2024'] |
ocfnash assignee:ocfnash |
55-29065 1 month ago |
102-9702 102 days ago |
2-57577 2 days |
| 36832 |
KryptosAI author:KryptosAI |
chore(Data/Finset/Card): rename `pred_card_le_card_erase` to `sub_one_card_le_card_erase` |
## Summary
The name `pred_card_le_card_erase` suggests `Nat.pred` but the statement uses `- 1` (i.e., `Nat.sub 1`). Rename to `sub_one_card_le_card_erase` to match the actual statement.
A deprecated alias is added for backwards compatibility.
### Files changed
- `Mathlib/Data/Finset/Card.lean` — definition renamed + deprecated alias
- `Mathlib/Data/Finset/Powerset.lean` — reference updated
- `Mathlib/Combinatorics/Additive/SubsetSum.lean` — reference updated
- `Mathlib/Algebra/Polynomial/EraseLead.lean` — reference updated
Addresses the `Finset.pred_card_le_card_erase` item in #21584.
## AI disclosure
I used Claude Code to explore the codebase (finding all references to rename) and to draft the PR description. I reviewed and understand all changes — these are straightforward renames with a deprecated alias. |
new-contributor
awaiting-author
|
22/15 |
Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Combinatorics/Additive/SubsetSum.lean,Mathlib/Combinatorics/SetFamily/AhlswedeZhang.lean,Mathlib/Combinatorics/SetFamily/Shadow.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Set/Card.lean,Mathlib/GroupTheory/Perm/Support.lean,Mathlib/RingTheory/Ideal/Operations.lean |
9 |
8 |
['KryptosAI', 'Multramate', 'dagurtomas', 'github-actions', 'mattrobball', 'ooovi'] |
nobody |
55-21509 1 month ago |
55-21509 55 days ago |
59-48094 59 days |
| 32555 |
ksenono author:ksenono |
feat(Combinatorics/SimpleGraph/Matching): maximum and maximal matchings for Konig's theorem |
---
<!-- Your PR title will become the first line of the commit message.
definitions and existence of maximum/maximal matchings in simple graphs.
-->
[](https://gitpod.io/from-referrer/)
|
t-combinatorics
new-contributor
awaiting-author
|
112/0 |
Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean |
2 |
46 |
['SnirBroshi', 'SproutSeeds', 'YaelDillies', 'b-mehta', 'github-actions', 'jcommelin', 'ksenono'] |
YaelDillies assignee:YaelDillies |
55-8731 1 month ago |
55-22890 55 days ago |
130-57925 130 days |
| 37584 |
kennethgoodman author:kennethgoodman |
feat(Data/Nat/Fib): formalize Lamé's theorem |
## Summary
Formalize [Lamé's theorem](https://en.wikipedia.org/wiki/Lam%C3%A9%27s_theorem) (1844), the founding result of computational complexity theory.
**Lamé's Theorem:** If the Euclidean algorithm on inputs `(a, b)` with `b ≤ a` takes `n + 1` division steps, then `b ≥ fib(n + 1)` and `a ≥ fib(n + 2)`.
### New definitions
- `Nat.euclidSteps`: counts the number of division steps in the Euclidean algorithm on natural number inputs.
### New theorems
- `Nat.fib_le_of_euclidSteps`: the main Lamé bound — Fibonacci lower bound on inputs given a step count.
- `Nat.euclidSteps_le_of_lt_fib`: the contrapositive — step count upper bound given a Fibonacci bound on the smaller input.
- `Nat.add_mod_le`: helper lemma that `b + a % b ≤ a` when `b ≤ a` and `0 < b`.
### Proof strategy
Induction on `n`, tracking both elements of the pair. The key insight is that each Euclidean step replaces `(a, b)` with `(b, a % b)`, and since `a ≥ b + a % b` (because `a / b ≥ 1`), the Fibonacci recurrence `fib(n+3) = fib(n+2) + fib(n+1)` matches the structure of the algorithm.
### References
- Gabriel Lamé, *Note sur la limite du nombre des divisions dans la recherche du plus grand commun diviseur entre deux nombres entiers*, Comptes rendus de l'Académie des sciences, 1844.
---
### AI usage disclosure
Per the [Mathlib AI guidelines](https://leanprover-community.github.io/contribute/index.html#use-of-ai): Claude Code (Claude Opus 4.6) was used to assist with writing the Lean 4 proof code, fixing tactic errors, and drafting this PR description. The mathematical proof (induction on step count, tracking both pair elements through the Fibonacci recurrence) was designed by hand and verified on paper before formalization. I have reviewed and understand every line of the resulting Lean code and can explain all proof steps.
---
- [x] builds cleanly (`lake build Mathlib.Data.Nat.Fib.Lame`)
- [x] no `sorry`
- [x] lines ≤ 100 characters, no trailing whitespace
- [x] `autoImplicit false`
- [x] docstrings on all public declarations |
new-contributor
LLM-generated
t-data
merge-conflict
|
121/0 |
Mathlib.lean,Mathlib/Data/Nat/Basic.lean,Mathlib/Data/Nat/Fib/Basic.lean,Mathlib/Data/Nat/Fib/Lame.lean,docs/1000.yaml |
5 |
25 |
['euprunin', 'github-actions', 'kennethgoodman', 'mathlib-merge-conflicts', 'vihdzp', 'wwylele'] |
TwoFX assignee:TwoFX |
54-82003 1 month ago |
54-82004 54 days ago |
44-66371 44 days |
| 36274 |
JTylM author:JTylM |
feat(Combinatorics/SimpleGraph/Matching): implemented the matchingNumber of a graph |
---
- [ ] depends on: #36406
- [ ] depends on: #32555
I implemented the matchingNumber as described in the issue and proved some statements including
showing that there exists a matching achieving the matchingNumber.
matchingNumber is increasing under injective maps
matchingNumber is equal under isomorphisms
matchingNumber of a matching is the cardinality of the matching
This is my first PR and i had some trouble with some of the proofs, especially with the proof for matchingNumber.isAttained. So any suggestions on how to make the proofs shorter would be welcome. Also i was not sure about the naming of some of the theorems so i would apprechiate feedback here as well.
|
new-contributor
t-combinatorics
blocked-by-other-PR
merge-conflict
|
292/2 |
Mathlib/Combinatorics/SimpleGraph/Matching.lean |
1 |
40 |
['JTylM', 'SnirBroshi', 'SproutSeeds', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vlad902'] |
nobody |
54-61853 1 month ago |
115-15520 115 days ago |
9-69432 9 days |
| 39569 |
AlexBrodbelt author:AlexBrodbelt |
feat(Mathlib/Data/Finite/Units): Units are (in)finite if type is (in)finite |
Shows
- [ ] depends on: #39568
- [ ] depends on: #39567
---
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[](https://gitpod.io/from-referrer/)
|
blocked-by-other-PR
t-data
new-contributor
|
75/0 |
Mathlib.lean,Mathlib/Data/Finite/Option.lean,Mathlib/Data/Finite/Subtype.lean,Mathlib/Data/Finite/Units.lean |
4 |
3 |
['github-actions', 'mathlib-dependent-issues'] |
nobody |
54-23013 1 month ago |
54-28898 54 days ago |
0-121 2 minutes |
| 39568 |
AlexBrodbelt author:AlexBrodbelt |
feat(Mathlib/Data/Finite/Subtype): Subtype of elements not equal to a term is finite iff type is finite |
Subtype of terms not equal to a term is finite iff type is finite.
This is an intermediate result to prove that if a `GroupWithZero` is (in)finite then the `Units` are (in)finite.
- [ ] depends on: #39567 [shows option type is finite iff type is finite]
---
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|
t-data
new-contributor
blocked-by-other-PR
|
45/0 |
Mathlib.lean,Mathlib/Data/Finite/Option.lean,Mathlib/Data/Finite/Subtype.lean |
3 |
5 |
['AlexBrodbelt', 'github-actions', 'mathlib-dependent-issues', 'themathqueen'] |
nobody |
54-12649 1 month ago |
54-28239 54 days ago |
0-2171 36 minutes |
| 33786 |
hdmkindom author:hdmkindom |
feat(Analysis/Matrix): add Jacobian matrix for matrix-valued functions |
This PR introduces the Jacobian matrix for matrix-valued functions `F : Matrix m n 𝕜 → Matrix p q 𝕜`.
The Jacobian matrix `jacobianMatrix F X` at point `X` is indexed by `(p × q) × (m × n)`, where each entry represents the partial derivative with respect to a basis element. To handle instance-mismatch issues with matrix norms, we use local Frobenius norm instances.
This PR adds the new file:
'Analysis/Matrix/Jacobian.lean'
## Main definitions
- `jacobianMatrix F X`: The Jacobian matrix at point `X`, defined by `jacobianMatrix F X (i, k) (j, l) = (fderiv ℝ F X (Matrix.single j l 1)) i k`
## Main theorems
- `fderiv_eq_jacobian_mul`: Express the Fréchet derivative as a contraction with the Jacobian
- `jacobianMatrix_comp`: Chain rule for Jacobian matrices
- `jacobianMatrix_linear`, `jacobianMatrix_id`, `jacobianMatrix_const`: Basic properties
- `jacobianMatrix_add`, `jacobianMatrix_smul`: Linearity properties
|
t-analysis
new-contributor
awaiting-author
|
174/0 |
Mathlib.lean,Mathlib/Analysis/Matrix/Jacobian.lean |
2 |
21 |
['erdOne', 'github-actions', 'hdmkindom', 'jcommelin'] |
sgouezel assignee:sgouezel |
54-5451 1 month ago |
145-11893 145 days ago |
39-35999 39 days |
| 33714 |
idontgetoutmuch author:idontgetoutmuch |
feat(Mathlib/Geometry/Manifold): Riemannian metrics exist II |
Supersedes https://github.com/leanprover-community/mathlib4/pull/33519
---
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|
t-differential-geometry
new-contributor
|
723/0 |
Mathlib.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Geometry/Manifold/ExistsRiemannianMetric.lean,Mathlib/Geometry/Manifold/PartitionOfUnity.lean |
4 |
200 |
['Rida-Hamadani', 'github-actions', 'grunweg', 'idontgetoutmuch'] |
nobody |
52-63091 1 month ago |
84-16242 84 days ago |
129-22875 129 days |
| 39673 |
drocta author:drocta |
feat: add instances of MetricSpace, NormedAddGroup, and NormedAddCommGroup for DirectLimit |
add files `Topology/MetricSpace/DirectLimit.lean` (with an instance of `MetricSpace` for a `DirectLimit` of a directed system of `MetricSpace`s with `IsometryClass` map types between them) and `Analysis/Normed/Group/DirectLimit.lean` (with instances of `NormedAddGroup` and `NormedAddCommGroup` on `DirectLimit`)
also lemmas `dist_def` and `norm_def` for these.
---
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This PR is part of a project of adding support for direct limits of $C^*$-algebras (as I described [on Zulip](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Early.20feedback.20on.20approach.20towards.20formalizing.20UHF.20algebras.3F) ).
This PR uses `IsometryClass` to implement the requirement that the directed systems preserve the `Norm` on the `NormedAddGroup`s, following the advice I got [this Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Representing.20norm-preservation.20for.20directed.20systems.3F/with/595941824) .
Use of AI:
I again used ChatGPT a bit for some advice when writing this (for example, for ideas for simplifying parts of proofs that I suspected could be simpler/shorter, and for advice on which of a couple options would be more idiomatic).
I can personally vouch for all of these contributions, and that I understand this code.
|
t-topology
new-contributor
awaiting-author
|
258/0 |
Mathlib.lean,Mathlib/Analysis/Normed/Group/DirectLimit.lean,Mathlib/Analysis/Normed/Ring/DirectLimit.lean,Mathlib/Topology/MetricSpace/DirectLimit.lean |
4 |
23 |
['drocta', 'eric-wieser', 'github-actions', 'j-loreaux'] |
nobody |
51-45922 1 month ago |
51-59392 51 days ago |
0-14741 4 hours |
| 35069 |
A-M-Berns author:A-M-Berns |
feat(Geometry/Polygon): simple polygons and boundary map |
This PR introduces Simple polygons with the predicate `IsSimple`, which captures the idea of a non-self-intersecting boundary, in the file Simple.lean. In the file Boundary.lean, a boundary map from `AddCircle n` is defined. I prove that the range of this map is the boundary and that this map is injective if and only if the polygon is simple. I kept Boundary.lean and Simple.lean separate because future results will include stuff just about the boundary map independent of simplicity (e.g. that it is continuous in the appropriate setting) and stuff just about simple polygons independent of the boundary map (e.g. that for n = 3, IsSimple iff HasNondegenerateVertices.) I used Claude Code to help generate some of the proof material, but I golfed and edited all AI contribution.
- [x] depends on: #34598
---
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new-contributor
t-euclidean-geometry
LLM-generated
|
360/0 |
Mathlib.lean,Mathlib/Geometry/Polygon/Boundary.lean,Mathlib/Geometry/Polygon/Simple.lean,Mathlib/Logic/Equiv/Fin/Rotate.lean |
4 |
30 |
['A-M-Berns', 'eric-wieser', 'github-actions', 'joneugster', 'jsm28', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp', 'wwylele'] |
nobody |
50-63093 1 month ago |
137-2548 137 days ago |
139-36484 139 days |
| 31796 |
dobronx1325 author:dobronx1325 |
feat(Data/Real/EReal): add mul_lt_mul_of_pos_left theorem |
This PR adds the theorem `EReal.mul_lt_mul_of_pos_left`, which states that for a positive real number `a` and extended reals `b < c`, left multiplication by `a` preserves the strict order: `(a : EReal) * b < (a : EReal) * c`.
The theorem complements existing order-preserving properties for addition in `EReal` and extends the algebraic structure for multiplication. The proof uses basic properties of extended reals and order relations.
---
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|
t-data
new-contributor
merge-conflict
|
23/0 |
Mathlib/Data/EReal/Operations.lean |
1 |
5 |
['JovanGerb', 'LLaurance', 'dobronx1325', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
50-24585 1 month ago |
229-21813 229 days ago |
6-25774 6 days |
| 35834 |
homeowmorphism author:homeowmorphism |
feat(Mathlib/GroupTheory/PresentedGroup): every group has a presentation |
We show that every group has a presentation defined by taking the free group with all of the group elements as the generators, and defining the relations as the kernel of the induced subjective homomorphism from that free group to the group itself.
Use of AI: This has been vibe-coded with GPT-Codex-5.3, was updated through review, and was double-checked by the author.
---
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[](https://gitpod.io/from-referrer/)
|
new-contributor
t-group-theory
large-import
awaiting-author
LLM-generated
merge-conflict
|
29/1 |
Mathlib/GroupTheory/PresentedGroup.lean |
1 |
16 |
['copilot-pull-request-reviewer', 'euprunin', 'github-actions', 'homeowmorphism', 'mathlib-bors', 'mathlib-merge-conflicts', 'plp127', 'tb65536'] |
tb65536 assignee:tb65536 |
50-4668 1 month ago |
128-75601 128 days ago |
4-30999 4 days |
| 39146 |
anovickis author:anovickis |
feat(Analysis/CStarAlgebra/Matrix): CompactSpace instances for unitaryGroup and specialUnitaryGroup |
Adds `CompactSpace` instances (and supporting `IsClosed` / `IsCompact` lemmas) for the matrix unitary and special unitary groups.
The compactness follows from Heine-Borel applied to the entrywise sup norm: every unitary matrix has all entries bounded by `1` (via the existing `entry_norm_bound_of_unitary` lemma), and `Matrix n n 𝕜` is finite-dimensional, so `closed + bounded ⇒ compact`.
### New declarations
- `isClosed_unitaryGroup`, `isCompact_unitaryGroup`
- `instance Matrix.unitaryGroup.instCompactSpace`
- `isClosed_specialUnitaryGroup`, `isCompact_specialUnitaryGroup`
- `instance Matrix.specialUnitaryGroup.instCompactSpace`
All placed inside the existing `EntrywiseSupNorm` section in `Mathlib/Analysis/CStarAlgebra/Matrix.lean`, so the `Matrix.Norms.Elementwise` scope used for the bound is already in scope.
### Motivation
These instances enable downstream constructions of compact matrix Lie groups such as flag manifolds (e.g. SU(3)/T = F₂), where the quotient inherits compactness for free via `Quotient.compactSpace`. They also fill an obvious gap in the matrix-group API: `unitary R` is known to be closed, but compactness for `Matrix.unitaryGroup` was not previously available as an instance.
Claude Code / Anthropic was used for generating the code, Verification was done with lake build, each lemma reviewed. Proofs came out of F2 mass gap lean library - so compile verified |
t-analysis
new-contributor
awaiting-author
|
52/0 |
Mathlib/Analysis/CStarAlgebra/Matrix.lean |
1 |
12 |
['anovickis', 'github-actions', 'j-loreaux', 'wwylele'] |
nobody |
48-86153 1 month ago |
62-78161 62 days ago |
0-7559 2 hours |
| 31898 |
ntapiam author:ntapiam |
feat(LinearAlgebra/TensorAlgebra): implement HopfAlgebra for TensorAlgebra |
implementation of the natural Hopf algebra structure on the TensorAlgebra |
new-contributor
t-ring-theory
awaiting-author
merge-conflict
|
253/0 |
Mathlib.lean,Mathlib/Algebra/FreeAlgebra.lean,Mathlib/LinearAlgebra/TensorAlgebra/Basic.lean,Mathlib/RingTheory/Bialgebra/FreeAlgebra.lean,Mathlib/RingTheory/Bialgebra/TensorAlgebra.lean,Mathlib/RingTheory/HopfAlgebra/TensorAlgebra.lean |
6 |
66 |
['YaelDillies', 'github-actions', 'hawkrobe', 'kckennylau', 'mathlib-merge-conflicts', 'ntapiam'] |
nobody |
47-78611 1 month ago |
231-64371 231 days ago |
0-34649 9 hours |
| 39871 |
daiduo2 author:daiduo2 |
feat(Analysis/ODE): Uniform Gronwall inequality |
## Summary
Adds the integral-form **Uniform Gronwall inequality**, a variant of Gronwall's inequality essential in PDE theory. Unlike the standard Gronwall bound which depends on an initial value, the uniform version provides a bound on `y(t)` that depends only on the **time-averages** of `g`, `h`, and `y` over sliding windows of length `r`.
## Mathematical Statement
Let `y, g, h : ℝ → ℝ` satisfy `y'(t) ≤ g(t) * y(t) + h(t)` on `[0, T)`. If for some `r > 0`:
- `∫_t^{t+r} g(s) ds ≤ a₁`
- `∫_t^{t+r} h(s) ds ≤ a₂`
- `∫_t^{t+r} y(s) ds ≤ a₃`
for all `t ∈ [0, T-r]`, then `y(t) ≤ (a₃/r + a₂) * exp(a₁)` for all `t ∈ [r, T]`.
## Changes
- **New file**: `Mathlib/Analysis/ODE/UniformGronwall.lean` (~590 lines)
- `uniformGronwallBound` — the explicit bound
- `uniformGronwallBound_of_a₂0_a₃0`, `uniformGronwallBound_nonneg` — simp lemmas
- `le_uniformGronwallBound_of_deriv_le` — main theorem
- **Updated**: `Mathlib.lean` — added import
## Design Decisions
- Real-valued functions `ℝ → ℝ` (generalization to normed spaces left for future work)
- Right derivatives (`HasDerivWithinAt` with `Ici`), matching `Gronwall.lean` style
- Assumes non-negativity (`g, h, y ≥ 0`), standard in PDE applications
## References
- R. Temam, *Infinite-Dimensional Dynamical Systems in Mechanics and Physics*, Appendix A |
t-analysis
new-contributor
awaiting-author
LLM-generated
|
601/0 |
Mathlib.lean,Mathlib/Analysis/ODE/UniformGronwall.lean |
2 |
4 |
['daiduo2', 'github-actions', 'grunweg'] |
nobody |
45-78972 1 month ago |
47-3480 47 days ago |
0-13098 3 hours |
| 36487 |
samueloettl author:samueloettl |
feat(Dynamics): Ergodicity characterization |
---
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-->
- [ ] depends on: #35402
- [x] depends on: #35451
This is a work in progress for a characterization of ergodicity via a Birkhoff Average.
Coarse Feedback is very encouraged.
[](https://gitpod.io/from-referrer/)
|
WIP
new-contributor
large-import
blocked-by-other-PR
|
421/1 |
Mathlib/Dynamics/Ergodic/Function.lean,Mathlib/Dynamics/Ergodic/OnAverageIndependent.lean,Mathlib/Topology/MetricSpace/Pseudo/Basic.lean |
3 |
5 |
['github-actions', 'lua-vr', 'mathlib-dependent-issues', 'samueloettl'] |
nobody |
44-75807 1 month ago |
123-9506 123 days ago |
0-163 2 minutes |
| 33817 |
FlAmmmmING author:FlAmmmmING |
fix(Combinatorics/Enumerative/Schroder): fix the definition of `smallSchroder` |
In the previous definition, the small Schröder numbers were defined as
```LaTeX
s_0 = 1, s_1 = 1, s_2 = 1, s_3 = 3...
```
, which does not match the sequence listed in OEIS A006318. Moreover, this definition makes it difficult to correctly write the generating function for the small Schröder numbers. This PR fixes this issue.
---
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-->
[](https://gitpod.io/from-referrer/)
|
new-contributor
t-combinatorics
large-import
awaiting-author
merge-conflict
|
61/39 |
Mathlib/Combinatorics/Enumerative/Schroder.lean |
1 |
21 |
['FlAmmmmING', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] |
YaelDillies assignee:YaelDillies |
43-67598 1 month ago |
108-45604 108 days ago |
74-58112 74 days |
| 35951 |
parabamoghv author:parabamoghv |
feat(CategoryTheory/Monoidal): evaluation coevaluation isomorphisms |
This PR adds four features to rigid categories:
1. `coevaluation_evaluation` and `evaluation_coevaluation` as isomorphism equalities: Using `IsIso` instances for the `evaluation` and `coevaluation` morphisms, we promote the morphism equalities to isomorphism equalities.
2. `ExactPairing Y X` from `ExactPairing X Y`: Using an exact pairing and `IsIso` instances for both `evaluation` and `coevaluation`, we swap the exact pairing by inverting the evaluation and coevaluation morphisms. Any suggestions for the definition name are welcome. Right now it is `ExactPairing.Symm`. The second choice was `ExactPairing.Swap`.
3. `HasLeftDual X` from `HasRightDual X`: Using a `HasRightDual X` instance and relevant `IsIso` instances, we construct a left dual. Similar construction for the other way.
4. `LeftDual` isomorphic to `RightDual`: Using relevant `IsIso` instances, we provide the isomorphism from the left dual of an object to the right dual. This can be achieved in two ways: either by using `leftDualIso` or using `rightDualIso`. We will prove in a subsequent PR that both these isomorphisms are equal.
Motivation: This is part of an effort to formalize CategoricalGroups, which can be defined as right rigid groupoids. The approach is motivated by the discussion in [#34830](https://github.com/leanprover-community/mathlib4/pull/34830).
Any comments or suggestions are welcome, especially about the naming.
---
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git commit --author="Author Name <author@email.com>" --allow-empty -m "add Author Name as coauthor"
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-->
[](https://gitpod.io/from-referrer/)
|
t-category-theory
new-contributor
awaiting-author
merge-conflict
|
64/2 |
Mathlib/CategoryTheory/Monoidal/Rigid/Basic.lean |
1 |
19 |
['dagurtomas', 'github-actions', 'joelriou', 'mathlib-merge-conflicts', 'parabamoghv', 'robin-carlier'] |
robin-carlier assignee:robin-carlier |
43-65940 1 month ago |
115-2336 115 days ago |
7-83579 7 days |
| 38595 |
openendings author:openendings |
chore(CategoryTheory): remove defeq abuse in Monad/Kleisli.lean |
Currently most of Kleisli.lean uses defeq abuse to perform deep rewrites equivalent to `Kleisli.of_mk`, `Kleisli.mk_of`, etc.
This PR removes all backward.isDefEq.respectTransparency from the file. Additionally:
- Add `theorem Kleisli.comp`, encoding `Kleisli.category.map_comp` in the base category.
- Add `theorem Cokleisli.comp`, encoding `category.map_comp` in the base category.
- Make `C` implicit in `Monad.unit_naturality` and `Monad.mu_naturality`.
- Make `C` implicit in `Comonad.counit_naturality` and `Comonad.delta_naturality`.
---
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may create empty commits to indicate co-authorship, using commands like so:
git commit --author="Author Name <author@email.com>" --allow-empty -m "add Author Name as coauthor"
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the commit message (that is, directly before the `---`) using the following format:
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Moves:
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Deletions:
- Nat.bit1_add_bit1
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-->
- ~~I would greatly appreciate advice ([e.g. via Zulip](https://leanprover.zulipchat.com/#user/1060393)) on tackling the remainder of this file: the defeqs mostly appear in morally `simp`/`calc` proofs that look horrid in `refine` style.
I can supply more rfl theorems like `of_mk` and `mk_of` (and hope to do so in subsequent PRs), but don't know how to use them for a deep type rewrite.~~
[](https://gitpod.io/from-referrer/) |
t-category-theory
new-contributor
awaiting-author
WIP
merge-conflict
|
95/28 |
Mathlib/CategoryTheory/Monad/Basic.lean,Mathlib/CategoryTheory/Monad/Kleisli.lean,MathlibTest/CategoryTheory/Monad.lean |
3 |
23 |
['dagurtomas', 'github-actions', 'joelriou', 'mathlib-merge-conflicts', 'openendings'] |
nobody |
43-62131 1 month ago |
75-54949 75 days ago |
0-4425 1 hour |
| 39164 |
allenhaozhu author:allenhaozhu |
feat(Probability/Distance): add total variation distance `tvDist` |
Add `MeasureTheory.tvDist : Measure α → Measure α → ℝ≥0∞`, the total variation distance between two measures, defined via the truncated subtraction `μ - ν` already in `Mathlib.MeasureTheory.Measure.Sub`. Add four basic lemmas (`tvDist_self`, `tvDist_comm`, `tvDist_nonneg`, `tvDist_le_one`) and a bridge lemma `tvDist_eq_signedMeasure_totalVariation` connecting `tvDist` to the existing `MeasureTheory.SignedMeasure.totalVariation` for finite measures.
---
## AI-assistance disclosure
Per the Mathlib [AI-use policy](https://leanprover-community.github.io/contribute/index.html#use-of-ai):
- **Tool.** Claude Code (Anthropic) with the Claude Sonnet 4.6 model.
- **Use.** I specified the target lemma statements and the proof strategy; the assistant drafted Lean 4 tactic combinations against current Mathlib. I iterated on the proofs, verified each lemma builds under `lake build` from a clean checkout, and read the final code.
- **Vouching.** I have read every declaration in this file and can defend the proofs without further AI assistance. I welcome reviewer feedback on naming, namespace placement, and stylistic alignment with the surrounding Mathlib modules. |
t-measure-probability
new-contributor
LLM-generated
awaiting-author
merge-conflict
|
187/0 |
Mathlib.lean,Mathlib/Probability/Distance/TotalVariation.lean |
2 |
5 |
['allenhaozhu', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] |
nobody |
43-61868 1 month ago |
62-32607 62 days ago |
0-2707 45 minutes |
| 34875 |
banrovegrie author:banrovegrie |
feat(LinearAlgebra/Matrix): add Sherman-Morrison formula |
Mathlib has the matrix determinant lemma (`det_add_replicateCol_mul_replicateRow` in SchurComplement.lean) but lacked the corresponding inverse formula. This PR fills that gap.
- Add `Matrix.inv_add_vecMulVec`: Sherman-Morrison formula for `(A + uv^T)^{-1}`
- Add `Matrix.inv_sub_vecMulVec`: subtraction variant
- Add `Matrix.isUnit_det_add_vecMulVec`: invertibility under the formula's hypotheses
## Test plan
- [x] `lake build` passes
- [x] Lines within 100 char limit
- [x] All declarations have docstrings
**Any specific AI usage?**: Used Copilot for review purposes. |
t-algebra
new-contributor
awaiting-author
label:t-algebra$ |
135/0 |
Mathlib.lean,Mathlib/LinearAlgebra/Matrix/ShermanMorrison.lean |
2 |
15 |
['Xxxjdjdid', 'banrovegrie', 'chrisflav', 'copilot-pull-request-reviewer', 'eric-wieser', 'github-actions', 'wwylele'] |
chrisflav assignee:chrisflav |
42-3587 1 month ago |
88-4664 88 days ago |
69-6728 69 days |
| 38887 |
Rosario-Leonardi-CT author:Rosario-Leonardi-CT |
feat(Analysis/Fourier/ZMod): add dft_star_comp |
Adds `ZMod.dft_star_comp`, expressing that `𝓕 (star ∘ Φ) k = star (𝓕 Φ (-k))`, the discrete analogue of the Fourier transform's interaction with complex conjugation, complementing the existing `dft_comp_neg`.
---
AI disclosure: lemma statement and proof drafted with assistance from Claude Code; verified by the Lean compiler with no `sorry` and standard axioms only (`propext`, `Classical.choice`, `Quot.sound`). |
t-analysis
new-contributor
awaiting-author
|
9/0 |
Mathlib/Analysis/Fourier/ZMod.lean |
1 |
9 |
['Rosario-Leonardi-CT', 'github-actions', 'wwylele'] |
j-loreaux assignee:j-loreaux |
42-2850 1 month ago |
65-1786 65 days ago |
5-6447 5 days |
| 35672 |
dennj author:dennj |
feat(RingTheory/Polynomial/Cyclotomic): vanishing sums and fiber equidistribution at primitive roots |
## Summary
Building on `sum_eq_zero_iff_forall_eq` from #34592, this PR adds:
- cyclotomic_dvd_of_aeval_eq_zero, exists_int_smul_cyclotomic_of_natDegree_le_totient — integer polynomials vanishing at a primitive n-th root are divisible by cyclotomic n ℤ, and (for degree ≤ φ(n)) integer multiples of it.
- sum_eq_zero_iff_forall_eq and its ℤ / ZMod p variants — vanishing iff all coefficients equal.
- sum_fiber_eq_sum_fiber_of_sum_weighted_pow_eq_zero, card_fiber_eq_card_div_of_sum_pow_eq_zero — fiber equidistribution.
- cyclotomic_prime_coeff — the formula (cyclotomic p R).coeff i = if i < p then 1 else 0, generalising existing coeff_zero/coeff_one lemmas.
-
References: [deLauneyFlannery2011, Lemma 2.8.5] (underlying ℚ/ℕ fact) and [armario2024, Lemma 7 and Theorem 3] (ℤ statement and the fiber-counting application).
Theorems imported from: https://github.com/Latinum-Agentic-Commerce/AlgebraicDesignTheory
Human made PR with LLM used for documentation and proof golfing |
t-ring-theory
new-contributor
LLM-generated
awaiting-author
|
128/2 |
Mathlib/RingTheory/Polynomial/Cyclotomic/Basic.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Roots.lean,docs/references.bib |
3 |
7 |
['dennj', 'github-actions', 'grunweg', 'ocfnash', 'riccardobrasca'] |
riccardobrasca assignee:riccardobrasca |
39-28888 1 month ago |
39-28888 39 days ago |
46-65914 46 days |
| 35753 |
Vilin97 author:Vilin97 |
feat(Topology/Algebra/Order): regular grid helpers and piecewise linear interpolation |
Make API for piecewise linear interpolation on regular grids. I need these to for ODE time-stepping methods, like forward Euler, and later Runge–Kutta methods.
Follow-up PR: #35755 (forward Euler method convergence).
I don't know if these numerical analysis ODE-solving methods even belong in mathlib. If someone could advise me on it, I would appreciate it.
---
The initial proof was produced by [Aristotle](https://aristotle.harmonic.fun). The code was iteratively refined (factoring out lemmas, golfing, simplifying proofs) using Claude Code.
- [ ] depends on: #38091 |
t-topology
new-contributor
LLM-generated
maintainer-merge
|
201/0 |
Mathlib.lean,Mathlib/Topology/Algebra/Order/PiecewiseLinear.lean |
2 |
59 |
['Vilin97', 'YanYablonovskiy', 'adomani', 'botbaki-review', 'copilot-pull-request-reviewer', 'dagurtomas', 'eric-wieser', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-dependent-issues', 'wwylele'] |
nobody |
38-63093 1 month ago |
71-73813 71 days ago |
104-36143 104 days |
| 39986 |
CRudrum author:CRudrum |
feat: add HasKernels instance for Pointed |
---
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Moves:
- Vector.* -> List.Vector.*
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Deletions:
- Nat.bit1_add_bit1
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- [ ] depends on: #xyz [optional extra text]
-->
[](https://gitpod.io/from-referrer/)
|
new-contributor
t-category-theory
large-import
awaiting-author
|
28/2 |
Mathlib/CategoryTheory/Category/Pointed.lean |
1 |
11 |
['CRudrum', 'Whysoserioushah', 'dagurtomas', 'github-actions'] |
nobody |
38-6317 1 month ago |
44-78798 44 days ago |
0-5451 1 hour |
| 40225 |
localparty author:localparty |
feat(RingTheory/LaurentSeries): leibniz product rule for derivative |
This PR adds the Leibniz product rule (`(f * g)' = f' * g + f * g'`) for the
first formal derivative on `LaurentSeries R` (R a commutative ring).
The first derivative is already packaged in
`Mathlib/RingTheory/LaurentSeries.lean` as
```lean
def derivative (R : Type*) {V : Type*} [AddCommGroup V] [Semiring R] [Module R V] :
LaurentSeries V →ₗ[R] LaurentSeries V :=
hasseDeriv R 1
```
with a `derivative_*` family of theorems (`derivative_apply`,
`derivative_iterate`, `derivative_iterate_coeff`). The Leibniz product rule
was missing. This PR fills that gap, adding `derivative_mul` alongside the
existing `derivative_*` family.
The proof is direct on coefficients via `HahnSeries.coeff_mul` and an
`addAntidiagonal` shift-bijection (matching the style of the existing
`hasseDeriv_*` lemmas). Five private helper lemmas factor the
coefficient-side calculation:
- `derivative_coeff` — clean coefficient formula at k = 1
- `support_derivative_subset` — `(derivative R f).support ⊆ (· - 1) '' f.support`
- `isPWO_shifted_support` — PWO preserved by the shift-by-(-1)
- `sum_bij_left` / `sum_bij_right` — `Finset.sum_nbij'` shift-reindexings
Total addition: ~85 LOC (5 private helpers + the public `derivative_mul`).
## Related future work
Full `Derivation` packaging for `LaurentSeries.hasseDeriv` (matching
`PowerSeries.derivative`-as-`Derivation` at
`Mathlib/RingTheory/PowerSeries/Derivative.lean:102`) is a natural follow-up,
since this Leibniz rule would discharge the `leibniz'` field. Out of scope
for this PR; can be a separate follow-up "LaurentSeries algebra-of-derivations
API" PR.
## Provenance
This lemma surfaced during work on a Lean 4 formalization of equisingular
flat connections (Connes–Marcolli 2008, Ch IV §6.4), where `LaurentSeries ℂ`
serves as the base ring for the ℂ((t))-module connection-matrix substrate.
The Leibniz rule is needed for the category-of-connection-preserving-maps
intertwining condition.
|
t-ring-theory
new-contributor
awaiting-author
LLM-generated
|
104/0 |
Mathlib/RingTheory/LaurentSeries.lean |
1 |
5 |
['github-actions', 'grunweg', 'localparty'] |
nobody |
37-84324 1 month ago |
38-5122 38 days ago |
0-8124 2 hours |
| 38348 |
mirajcs author:mirajcs |
feat(Geometry/Curve): add Frenet–Serret framework |
---
This PR introduces a basic formalization of smooth parametrized curves in `ℝ³`
(`EuclideanSpace ℝ (Fin 3)`) together with the Frenet frame and partial proofs
of the Frenet–Serret formulas.
Main contributions:
* Define `ParametrizedDifferentiableCurve` as a smooth map on an open interval.
* Define arc length and arc-length parametrization.
* Define geometric quantities:
- curvature `κ(t) = ‖α''(t)‖`
- tangent, normal, and binormal vector fields
- torsion via `‖B'(t)‖`
* Introduce the `FrenetFrame` structure.
* Prove key Frenet–Serret formulas:
- `T' = κ • N`
- `B' = -τ • N`
- `N' = -κ • T + τ • B`
The implementation relies on existing analysis and inner product space
infrastructure, as well as properties of the cross product in `ℝ³`.
Some intermediate lemmas about orthogonality and cross-product identities
are included.
At present, some results assume nonvanishing curvature/torsion and include
auxiliary hypotheses about derivatives. These can be streamlined in future work.
This development is intended as a foundation for further formalization of
classical differential geometry (curves and surfaces).
---
|
new-contributor
t-differential-geometry
awaiting-author
|
525/0 |
Mathlib.lean,Mathlib/Geometry/Curves/Basic.lean,Mathlib/Geometry/Curves/FrenetFrame.lean |
3 |
19 |
['bryangingechen', 'github-actions', 'mathlib-merge-conflicts', 'mirajcs', 'ocfnash', 'vihdzp', 'wwylele'] |
nobody |
37-58462 1 month ago |
75-6169 75 days ago |
6-55291 6 days |
| 39939 |
8e7 author:8e7 |
feat(Combinatorics/SimpleGraph/TreeDecomp): clique lemma for tree decompositions |
This PR proves the treewidth of a complete graph is `#V - 1` for finite V, and consequently, `G.cliqueNum - 1 <= G.treeWidth`. This PR follows #38334, and is a direct application of #39864.
AI Usage: The proofs were developed with the help of Claude Code. I vouch for all the code written and understand the content fully.
---
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- [ ] depends on: #38334
- [ ] depends on: #39864
[](https://gitpod.io/from-referrer/)
|
t-combinatorics
new-contributor
LLM-generated
blocked-by-other-PR
|
588/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/TreeDecomp.lean |
4 |
5 |
['8e7', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
37-56593 1 month ago |
46-4179 46 days ago |
0-3952 1 hour |
| 39282 |
Sfgangloff author:Sfgangloff |
feat(SymbolicDynamics): add union morphism lemma for LanguageOn |
In symbolic dynamics.
This PR proves that taking the language over a finite shape commutes with unions of configuration sets:
$LanguageOn (X \cup Y) U = LanguageOn X U \cup LanguageOn Y U$
The proof is a direct unfolding of definitions: a pattern in the language of $X \cup Y$ comes from restricting a configuration $x ∈ X \cup Y$, and splitting on whether $x \in X$ or $x \in Y$ yields the corresponding inclusion in either $LanguageOn X U$ or $LanguageOn Y U$. The converse direction rebuilds a witness in $X \cup Y$ from either side of the union.
Related to issue #39252 |
t-dynamics
new-contributor
awaiting-author
|
9/1 |
Mathlib/Dynamics/SymbolicDynamics/Basic.lean |
1 |
5 |
['Sfgangloff', 'github-actions', 'sgouezel'] |
sgouezel assignee:sgouezel |
37-31560 1 month ago |
37-31560 37 days ago |
23-7818 23 days |
| 39347 |
Sfgangloff author:Sfgangloff |
feat(SymbolicDynamics): refactor of Pattern and shift-invariance of shape languages for subshifts |
## Summary
This PR refactors Pattern.mulShift in Mathlib/Dynamics/SymbolicDynamics/Basic.lean and uses the cleaner definition to prove shift-invariance of the language of a subshift on a finite shape.
## Changes
Pattern.mulShift now returns a Pattern instead of a configuration (more natural).
- Old type: Pattern.mulShift : Pattern A G → G → (G → A)
- New type: Pattern.mulShift : Pattern A G → G → Pattern A G
- The result carries its support (p.support.image (v * ·)) and the
default-outside-support proof, so callers don't have to re-derive them.
The [IsLeftCancelMul G] hypothesis is moved to the lemmas that actually use it.
- The definition Pattern.mulShift itself no longer needs left-cancellation (it only
chooses a preimage noncomputably).
- The hypothesis is now stated on mulShift_config_apply_mul_left_of_mem and
mulOccursInAt_eq_cylinder directly, instead of being a section-level variable.
Renames following the type change.
- mulShift_apply_mul_left_of_mem → mulShift_config_apply_mul_left_of_mem (because we
now write (p.mulShift v).config instead of p.mulShift v).
New @[simp] and @[ext] lemmas for Pattern.
- Pattern.ext: two patterns are equal iff their supports agree and their
configurations agree on the support.
- Pattern.mulShift_support: the support of p.mulShift v is p.support.image (v * ·).
- Pattern.fromConfig_support: the support of fromConfig x U is U.
- Pattern.fromConfig_config_of_mem: on its support, fromConfig x U agrees with x.
New lemma Pattern.fromConfig_mulShift.
For a left inverse g' * g = 1, shifting the pattern fromConfig x U by g equals
fromConfig (mulShift g' x) (U.image (g * ·)).
New theorem MulSubshift.languageOn_image_mulShift.
For a subshift Y and elements g, g' with g * g' = 1 and g' * g = 1:
(fun p => p.mulShift g) '' Y.languageOn U = Y.languageOn (U.image (g * ·))
i.e. the language on the translated shape is exactly the image of the language on U
under the pattern-shift map. This gives a bijection between Y.languageOn U and
Y.languageOn (U.image (g * ·)), with inverse p ↦ p.mulShift g'. Stated for
left-cancellative monoids with an invertible element.
Updated docstrings for Pattern.mulShift and the renamed lemma to reflect the
bundled-Pattern return type and clarify which results need [IsLeftCancelMul G]. |
t-dynamics
new-contributor
awaiting-author
|
142/48 |
Mathlib/Dynamics/SymbolicDynamics/Basic.lean |
1 |
6 |
['github-actions', 'sgouezel'] |
sgouezel assignee:sgouezel |
37-30939 1 month ago |
37-30939 37 days ago |
22-25856 22 days |
| 40266 |
WangJiabai author:WangJiabai |
feat(RingTheory/MvPolynomial): define generic determinantal ideals |
This PR adds a foundational API for determinantal ideals of the generic matrix.
It defines `Matrix.MinorIndex`, the corresponding minors of the existing generic
matrix `Matrix.mvPolynomialX`, the finite set of all `t × t` generic minors, and
the ideal generated by these minors in `MvPolynomial (Fin m × Fin n) R`.
It also proves basic membership, evaluation, coefficient-map/base-change, and
finite-generation lemmas.
This PR intentionally does not include the Sturmfels/KRS/straightening/Groebner
part of the development.
---
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Additional context:
This is extracted and refactored from a standalone project on determinantal
ideals and the Gröbner-basis theorem for generic determinantal ideals:
https://github.com/WangJiabai/Determinantal-Ideals-Formalization
The current PR is intentionally limited to the small foundational API for
generic minors and generic determinantal ideals.
AI use:
ChatGPT was used for planning/refactoring discussion, and Codex was used to
draft some proof scripts. I reviewed the statements and proofs and am
responsible for the submitted code.
[](https://gitpod.io/from-referrer/)
|
t-ring-theory
new-contributor
LLM-generated
|
227/0 |
Mathlib.lean,Mathlib/RingTheory/MvPolynomial/DeterminantalIdeal.lean |
2 |
3 |
['WangJiabai', 'github-actions'] |
nobody |
37-5330 1 month ago |
37-6179 37 days ago |
37-5829 37 days |
| 32960 |
dleijnse author:dleijnse |
feat(FieldTheory): adjoin pth roots |
For a field `k` of exponential characteristic `p` and a subset `S` of `k`, we define the extension of `k` obtained by adjoining all `p`-th roots of elements of `S`. We prove that this is a purely inseparable extension, and provide some basic API.
---
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-->
[](https://gitpod.io/from-referrer/)
|
t-algebra
new-contributor
awaiting-author
merge-conflict
label:t-algebra$ |
131/0 |
Mathlib.lean,Mathlib/FieldTheory/PurelyInseparable/AdjoinPthRoots.lean |
2 |
14 |
['artie2000', 'chrisflav', 'dleijnse', 'erdOne', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] |
erdOne assignee:erdOne |
36-76929 1 month ago |
197-3579 197 days ago |
10-12739 10 days |
| 37281 |
AltSoKoly author:AltSoKoly |
Update EdgeConnectivity.lean |
---
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-->
[](https://gitpod.io/from-referrer/)
|
t-combinatorics
new-contributor
awaiting-author
merge-conflict
|
123/0 |
Mathlib/Combinatorics/SimpleGraph/Connectivity/EdgeConnectivity.lean,Mathlib/Data/Int/GCD.lean |
2 |
6 |
['github-actions', 'grunweg', 'mathlib-merge-conflicts', 'themathqueen'] |
nobody |
36-74461 1 month ago |
107-4572 107 days ago |
0-432 7 minutes |
| 40329 |
no-j author:no-j |
feat(Computability): matching εNFA.Path definition with NFA.Path |
Added εNFA.Path definition that is based on `Type` instead of `Prop` to match NFA's path definition
Added εNFA.Path.supp (same definition as NFA.Path.supp)
---
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[](https://gitpod.io/from-referrer/)
|
t-computability
new-contributor
|
60/23 |
Mathlib/Computability/EpsilonNFA.lean |
1 |
3 |
['github-actions'] |
nobody |
35-29078 1 month ago |
35-29911 35 days ago |
35-29933 35 days |
| 38344 |
robo7179 author:robo7179 |
feat(SimpleGraph/Coloring/VertexColoring): Matching is 2 colorable |
---
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[](https://gitpod.io/from-referrer/)
|
t-combinatorics
new-contributor
merge-conflict
|
51/0 |
Mathlib/Combinatorics/SimpleGraph/Coloring/VertexColoring.lean |
1 |
6 |
['SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'vlad902'] |
b-mehta assignee:b-mehta |
35-9437 1 month ago |
35-9438 35 days ago |
46-71620 46 days |
| 33355 |
0xTerencePrime author:0xTerencePrime |
feat(Combinatorics/SimpleGraph/Connectivity): define vertex connectivity |
**AI Disclosure**: Developed with LLM assistance (Claude). All mathematical design decisions were made by the author.
---
This PR introduces the foundations of vertex connectivity for simple graphs, providing a counterpart to the edge connectivity theory in #32870.
### Main definitions
- `SimpleGraph.IsVertexReachable`: two vertices are `k`-vertex-reachable if they remain reachable after removing any set of strictly fewer than `k` vertices, using `G.induce sᶜ`.
- `SimpleGraph.IsVertexPreconnected`: a graph is `k`-vertex-preconnected if any two vertices are `k`-vertex-reachable.
- `SimpleGraph.IsVertexConnected`: a graph is `k`-vertex-connected if it is `k`-vertex-preconnected and has more than `k` vertices (`k + 1 ≤ ENat.card V`).
### Key lemmas
- `k = 0`: 0-connected ↔ nonempty; 0-preconnected always holds
- `k = 1`: 1-connected ↔ `Nontrivial V ∧ G.Preconnected`
- `anti` / `mono`: antitonic in `k`, monotonic in the graph |
new-contributor
t-combinatorics
LLM-generated
awaiting-author
merge-conflict
|
169/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/VertexConnectivity.lean |
2 |
166 |
['0xTerencePrime', 'SnirBroshi', 'SproutSeeds', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] |
b-mehta assignee:b-mehta |
34-76234 1 month ago |
40-72698 40 days ago |
65-5110 65 days |
| 36210 |
vbeffara author:vbeffara |
feat(Combinatorics/SimpleGraph): definitions of graph contraction and graph minor |
A contraction is the image of a graph through a surjective function with connected fibers, and a minor is a contraction of a subgraph.
This PR shows that being a contraction is transitive, but does not show the same for minors because the proof is more involved, it will be in a subsequent PR. The definitions are in `Prop` and do not contain data, but I'm not sure if that was the right choice.
---
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any "Co-authored-by" lines) using the following format:
Moves:
- Vector.* -> List.Vector.*
- ...
Deletions:
- Nat.bit1_add_bit1
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- [ ] depends on: #xyz [optional extra text]
-->
[](https://gitpod.io/from-referrer/)
|
t-combinatorics
new-contributor
awaiting-author
merge-conflict
|
151/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Contraction.lean,Mathlib/Combinatorics/SimpleGraph/Minor.lean |
3 |
9 |
['YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'robin-carlier', 'vbeffara'] |
b-mehta assignee:b-mehta |
34-74606 1 month ago |
75-10220 75 days ago |
53-32590 53 days |
| 39697 |
sorrachai author:sorrachai |
feat(Data/Tree/Basic): add Membership instance, new notation, rename Tree |
Summary:
1. [Rename]([#CSLib > Splay tree PR: BinaryTree vs Tree @ 💬](https://leanprover.zulipchat.com/#narrow/channel/513188-CSLib/topic/Splay.20tree.20PR.3A.20BinaryTree.20vs.20Tree/near/596482765)) from Tree to BinaryTree, which propagates the changes to other files that use it.
2. Add membership instance, prove decidability of membership.
3. Add toListInOrder, toListPreOrder, toListPostOrder
Suggestion based on the discussion in the cslib [thread](https://leanprover.zulipchat.com/#narrow/channel/513188-CSLib/topic/Splay.20tree.20PR/near/596568391)[#CSLib > Splay tree PR @ 💬](https://leanprover.zulipchat.com/#narrow/channel/513188-CSLib/topic/Splay.20tree.20PR/near/596568391).
---
* depends on: #39707 |
new-contributor
awaiting-author
|
117/8 |
Mathlib/Data/Tree/Basic.lean |
1 |
8 |
['eric-wieser', 'github-actions', 'sorrachai'] |
nobody |
33-75713 1 month ago |
33-82043 33 days ago |
17-22788 17 days |
| 37071 |
ericluap author:ericluap |
feat: Dedekind completion of rationals is isomorphic to EReal |
|
t-order
new-contributor
awaiting-author
merge-conflict
|
128/4 |
Mathlib.lean,Mathlib/Data/EReal/Basic.lean,Mathlib/Data/EReal/DedekindCut.lean,Mathlib/Order/Completion.lean |
4 |
60 |
['ericluap', 'github-actions', 'mathlib-merge-conflicts', 'plp127', 'vihdzp', 'wwylele'] |
YaelDillies, bryangingechen, vihdzp assignee:bryangingechen assignee:YaelDillies assignee:vihdzp |
33-69390 1 month ago |
38-37708 38 days ago |
46-52403 46 days |
| 38546 |
yhx-12243 author:yhx-12243 |
fix(Algebra/Module/Injective): changing the universe from the module's to the ring's |
Change the definition of
```lean
class Module.Injective : Prop where
out : ∀ ⦃X Y : Type v⦄ [AddCommGroup X] [AddCommGroup Y] [Module R X] [Module R Y]
(f : X →ₗ[R] Y) (_ : Function.Injective f) (g : X →ₗ[R] Q),
∃ h : Y →ₗ[R] Q, ∀ x, h (f x) = g x
```
into
```lean
class Module.Injective : Prop where
out : ∀ ⦃X Y : Type u⦄ [AddCommGroup X] [AddCommGroup Y] [Module R X] [Module R Y]
(f : X →ₗ[R] Y) (_ : Function.Injective f) (g : X →ₗ[R] Q),
∃ h : Y →ₗ[R] Q, ∀ x, h (f x) = g x
```
where `u` is the universe of ring, `v` is the universe of module,
to make it agree with `Module.Baer` and real mathematical definition, **without universe issues** (make the theorem [`Module.Baer.of_injective`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Module/Injective.html#Module.Baer.of_injective) not require `Small.{v, u} R` issue).
This type of adaption also appeared in the criterion `Module.Flat`, which also uses `Type u` on testing modules.
See discussions in https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Universe.20issue.20about.20injective.20module .
---
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[](https://gitpod.io/from-referrer/)
|
t-algebra
new-contributor
awaiting-zulip
awaiting-author
label:t-algebra$ |
57/43 |
Mathlib/Algebra/Category/ModuleCat/Injective.lean,Mathlib/Algebra/Category/ModuleCat/Ulift.lean,Mathlib/Algebra/Module/Injective.lean,Mathlib/RepresentationTheory/FinGroupCharZero.lean,Mathlib/RingTheory/Flat/Tensor.lean,Mathlib/RingTheory/LocalProperties/Injective.lean |
6 |
10 |
['eric-wieser', 'github-actions', 'grunweg', 'mathlib-bors', 'wwylele', 'yhx-12243'] |
nobody |
33-35907 1 month ago |
76-77574 76 days ago |
0-26133 7 hours |
| 40416 |
sparckix author:sparckix |
feat(Order/Monotone): add diagonal subsequence extraction |
This PR adds a small diagonal extraction lemma for nested strictly monotone subsequences of `Nat`.
Given strict-mono maps `φ k : Nat -> Nat` such that each `φ (k + 1)` factors through `φ k` by a strict-mono map `τ k`, the diagonal sequence `fun n => φ n n` is strictly monotone and each tail of the diagonal factors through the corresponding `φ k` by a strict-mono map.
The lemma is intended as a reusable sequence/order fact and is placed near `Nat.exists_strictMono_subsequence`.
Local checks run:
```text
lake env lean Mathlib/Order/Monotone/Basic.lean
lake build Mathlib.Order.Monotone.Basic
lake exe lint-style Mathlib/Order/Monotone/Basic.lean
git diff --check
```
AI assistance disclosure: I used AI tools, including Codex and external model feedback, to help extract and review this small lemma from a local formalization project. I have checked the statement and proof myself and am responsible for the submitted code.
|
t-order
new-contributor
LLM-generated
|
66/0 |
Mathlib/Order/Monotone/Basic.lean |
1 |
2 |
['github-actions'] |
nobody |
32-76244 1 month ago |
33-8626 33 days ago |
33-8276 33 days |
| 40472 |
karlesmarin author:karlesmarin |
feat(Combinatorics/SimpleGraph): oriented incidence matrix and the La… |
# feat(Combinatorics/SimpleGraph): oriented incidence matrix and the Laplacian factorization
## Summary
Adds the **oriented incidence matrix** of a simple graph and the standard **Gram factorization
of the graph Laplacian**:
- **`SimpleGraph.orientedIncMatrix R : Matrix α (Sym2 α) R`** — in the column of an edge
`e = s(u, w)` with `u < w`: `+1` at row `w` (the larger endpoint), `-1` at row `u`, `0`
elsewhere; columns of non-edges are zero. Orientation induced by a `LinearOrder` on the
vertex type.
- **`SimpleGraph.orientedIncMatrix_mul_transpose`** — `N * Nᵀ = G.lapMatrix R` (= `D − A`).
- Supporting API mirroring `incMatrix`: `orientedIncMatrix_apply`,
`orientedIncMatrix_of_notMem_incidenceSet`, `orientedIncMatrix_mul_self`
(the square of an entry is the unoriented `incMatrix` entry), and the two sign lemmas
`orientedIncMatrix_apply_mul_apply_of_adj` (product of the two endpoint entries = `-1`),
`orientedIncMatrix_apply_add_apply_of_adj` (their sum = `0`), plus
`orientedIncMatrix_apply_mul_apply_of_ne` (vanishing away from the common edge).
## Why
Mathlib has the unoriented `G.incMatrix`, whose Gram matrix is the **signless** Laplacian
`D + A` (`incMatrix_mul_transpose_diag` ff.), and it has `G.lapMatrix = D − A` with its kernel
theory — but no object connecting the two. The oriented incidence matrix is that object, and
`N Nᵀ = D − A` is the factorization behind: positive semidefiniteness of the Laplacian as a
Gram fact, Kirchhoff/matrix-tree determinant arguments (via Cauchy–Binet on the reduced
factorization), and total unimodularity of incidence matrices.
## Design notes
- The fixed smaller→larger orientation is harmless: any orientation gives the same Gram matrix
(each edge contributes `(±1)²` on the diagonal and `(+1)(−1)` off it). This is stated in the
module docstring; no orientation-genericity machinery is introduced.
- The headline proof is entrywise: the diagonal reduces to `sum_incMatrix_apply` (= degree)
through `orientedIncMatrix_mul_self`; an off-diagonal `(u, w)` entry is supported on the
single column `s(u, w)`, handled by `Finset.sum_eq_single` and the sign lemmas.
- `[Ring R]` for the API section (signs need negation); the definition itself only needs
`[Zero R] [One R] [Neg R]`.
## Files / placement
- `Mathlib/Combinatorics/SimpleGraph/OrientedIncMatrix.lean` (new)
- `Mathlib.lean` (+1 import line)
## Verification
- `lake env lean` on the file: clean, zero warnings.
- `#print axioms SimpleGraph.orientedIncMatrix_mul_transpose` → 3 standard axioms.
- The factorization and the downstream matrix-tree chain were validated numerically in exact
arithmetic (SageMath) before formalization.
Downstream context: DOI [10.5281/zenodo.20629746](https://doi.org/10.5281/zenodo.20629746).
|
new-contributor
LLM-generated
|
157/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/OrientedIncMatrix.lean |
2 |
1 |
['github-actions'] |
nobody |
32-2033 1 month ago |
32-7110 32 days ago |
32-6853 32 days |
| 39192 |
jayscambler author:jayscambler |
feat(InnerProductSpace/PiL2): det of a linear isometry has unit norm |
Adds `LinearIsometryEquiv.norm_det` and the real corollary `LinearIsometryEquiv.abs_det`. The proof uses the unitary matrix of a linear isometry in orthonormal bases, via `LinearIsometryEquiv.toMatrix_mem_unitaryGroup` and `Matrix.det_of_mem_unitary`. The supporting matrix lemma is moved from `Adjoint.lean` to `PiL2.lean`, where it no longer depends on adjoints. |
t-analysis
new-contributor
LLM-generated
awaiting-author
|
22/0 |
Mathlib/Analysis/InnerProductSpace/PiL2.lean |
1 |
8 |
['github-actions', 'grunweg', 'jayscambler', 'sgouezel', 'themathqueen', 'wwylele'] |
sgouezel assignee:sgouezel |
31-26125 1 month ago |
52-14424 52 days ago |
10-9654 10 days |
| 37707 |
MavenRain author:MavenRain |
feat(Combinatorics/SimpleGraph): add IsMaximalClique/IsMaximalIndepSet, refactor IsMaximum* to MaximalFor |
Addresses #34962
|
new-contributor
t-combinatorics
merge-conflict
|
63/31 |
Mathlib/Combinatorics/SimpleGraph/Clique.lean |
1 |
7 |
['MavenRain', 'SnirBroshi', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
30-76764 1 month ago |
30-76765 30 days ago |
26-52833 26 days |
| 40520 |
Julian-Kuelshammer author:Julian-Kuelshammer |
feat(CategoryTheory/Linear): linear Yoneda and coYoneda are linear |
Mathlib/CategoryTheory/Linear/Basic.lean:
Adds an instance that the opposite category of a linear category is linear.
Mathlib/CategoryTheory/Linear/Yoneda.lean:
Adds instances that the linearYoneda and linearcoYoneda are linear functors, which was a TODO before.
---
[](https://gitpod.io/from-referrer/)
|
new-contributor
large-import
|
27/2 |
Mathlib/CategoryTheory/Linear/Basic.lean,Mathlib/CategoryTheory/Linear/Yoneda.lean |
2 |
3 |
['github-actions'] |
nobody |
30-72406 1 month ago |
30-73842 30 days ago |
30-74025 30 days |
| 34138 |
pfaffelh author:pfaffelh |
feat(MeasureTheory): Introduce `DiscreteMeasure α` giving rise to a `Measure α` as a sum of `dirac`s |
Define `DiscreteMeasure α` as a structure with `weight : α → ℝ≥0∞`
Define `toMeasure (w : DiscreteMeasure α) : Measure α` as a sum of diracs
Show properties of the resulting objects
This PR intends to start a more userfriendly interaction with discrete probability (measure) theory, in contrast to probability mass functions (`PMF`). There are two main differences between `DiscreteMeasure` and `PMF`:
* Every `PMF` hast the additional property `HasSum 1`, making the resulting measure a probability measure. (For `DiscreteMeasure`, I intend to use the typeclass `IsProbabilityMeasure`in a later PR instead.)
* The `toMeasure` function of `MassFunction` defines the measure as a sum of diracs, which immediately makes computations possible.
Discussion thread on [zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/PMF.20Refactor.3A.20FunLike.20vs.20Definition.20Change)
- depends on: #37060
---
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[](https://gitpod.io/from-referrer/)
|
t-measure-probability
new-contributor
|
216/0 |
Mathlib.lean,Mathlib/Algebra/GroupWithZero/Indicator.lean,Mathlib/Data/Set/Pairwise/Basic.lean,Mathlib/MeasureTheory/Measure/DiscreteMeasure.lean |
4 |
27 |
['DavidLedvinka', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'metakunt', 'ocfnash', 'pfaffelh'] |
ocfnash assignee:ocfnash |
30-39907 1 month ago |
30-37443 30 days ago |
82-21885 82 days |
| 40543 |
SnkXyx author:SnkXyx |
feat(Algebra/MvPolynomial/CharacteristicSet): add triangular set |
This PR defines the structure of a **Triangular Set** of multivariate polynomials. A Triangular Set is a finite ordered sequence of non-zero polynomials `[P₁, P₂, ..., Pₘ]` such that their main (max) variables are strictly increasing:
`mainVar(P₁) < mainVar(P₂) < ... < mainVar(Pₘ)`.
The definition was originally developed in PR #36103 as part of the formalization of the Characteristic Set Method (Wu-Ritt Method). The Characteristic Set project aims to formalize the algorithmic method for solving systems of multivariate polynomial equations in Lean 4, providing foundational infrastructure for algebraic geometry based on triangular decomposition.
Triangular sets provide a structured representation of polynomial systems that facilitates variable elimination. Since the main variables are strictly increasing, variables can be eliminated successively, starting from the last polynomial and proceeding backwards through the sequence. This makes triangular sets a fundamental object in Wu-Ritt Method.
---
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- Vector.* -> List.Vector.*
- ...
Deletions:
- Nat.bit1_add_bit1
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- [ ] depends on: #xyz [optional extra text]
-->
[](https://gitpod.io/from-referrer/)
|
WIP
t-algebra
new-contributor
label:t-algebra$ |
589/0 |
Mathlib.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/TriangularSet.lean |
2 |
3 |
['SnkXyx', 'github-actions'] |
nobody |
30-19852 1 month ago |
30-20686 30 days ago |
0-16 16 seconds |
| 38364 |
openendings author:openendings |
feat(Order): directed complete partial orders |
Define DirectedCompletePartialOrder and its interaction with iSup and sSup.
A directed complete partial order is equivalently:
- a partial order with LUBs of nonempty directed sets;
- what happens when you remove ⊥ from a CompletePartialOrder; or
- a ConditionallyCompletePartialOrder in which every directed set is BddAbove.
Like CPOs, DCPOs are commonly studied in denotational semantics.
---
Potential applications:
- [#Is there code for X? > Summing `ENat`s without topology](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Summing.20.60ENat.60s.20without.20topology/with/590070848) -- defining infinite sums in an DCPO-enriched `AddCommMonoidWithTop` such as `ENat` or `ENNReal`.
- [#Is there code for X? > Scott Induction](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Scott.20Induction/with/590112858) -- fixpoint theorems similar to `OmegaCompletePartialOrder`, generalised to arbitrary cardinalities.
[](https://gitpod.io/from-referrer/)
|
t-order
new-contributor
awaiting-author
|
123/0 |
Mathlib.lean,Mathlib/Order/DirectedCompletePartialOrder/Defs.lean,docs/references.bib |
3 |
5 |
['SnirBroshi', 'YaelDillies', 'github-actions', 'openendings'] |
YaelDillies assignee:YaelDillies |
29-44520 29 days ago |
29-44520 29 days ago |
51-77810 51 days |
| 36731 |
michael-novak-math author:michael-novak-math |
feat: Frénet moving frame and Frénet equation for plane curves |
We define the curvature function, normal vector function and the Frénet moving frame for plane curve.
We also prove the Frénet equations for plane curves.
A separate PR (#37489) will prove the fundamental theorem of plane curves. |
new-contributor
t-differential-geometry
t-analysis
awaiting-author
|
327/0 |
Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Calculus.lean,Mathlib/Geometry/PlaneCurves.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean,docs/references.bib |
5 |
117 |
['Ruben-VandeVelde', 'eric-wieser', 'github-actions', 'grunweg', 'michael-novak-math', 'scholzhannah'] |
nobody |
29-29402 29 days ago |
99-1571 99 days ago |
12-40134 12 days |
| 37279 |
imalinowskip author:imalinowskip |
feat(Probability): multivariate CLT |
---
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-->
- [x] depends on: #40345
[](https://gitpod.io/from-referrer/)
|
new-contributor
t-measure-probability
awaiting-author
blocked-by-other-PR
merge-conflict
|
483/3 |
Mathlib.lean,Mathlib/Probability/CentralLimitTheorem.lean,Mathlib/Probability/CramerWold.lean |
3 |
17 |
['EtienneC30', 'RemyDegenne', 'github-actions', 'imalinowskip', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
RemyDegenne assignee:RemyDegenne |
29-3128 29 days ago |
39-16162 39 days ago |
7-41719 7 days |
| 36326 |
Arnav-panjla author:Arnav-panjla |
Feat/gaussian schwartz map |
feat(Analysis/SpecialFunctions/Gaussian): define the Gaussian as a Schwartz function in 1D
Define the Gaussian function `x ↦ exp (-x^2)` as a `SchwartzMap` in the one-dimensional case.
The proof establishes the Schwartz decay conditions by showing that polynomially
weighted expressions of the form `(1 + x^2)^m * exp (-x^2)` are bounded. This
allows the Gaussian to be packaged using the `SchwartzMap` API.
During the implementation a few adjustments were required to match the current
Mathlib API. In particular:
* replace the non-existent `IsBigO.mul_right` with `IsBigO.of_bound` applied to the
full product `(1 + x^2)^m * exp (-x^2)`
* fix `mem_cocompact` usage by replacing `(hh_tendsto.eventually ...).mem_cocompact`
with `mem_cocompact.mp (hh_tendsto ...)`
* adjust the `hb_bound` step using `gcongr` with exact bounds so that both goals close
* remove the unused declaration `hf_nonpos`
* register the required import in `Mathlib.lean`
This implements the one-dimensional case mentioned in the issue. The generalization
to Gaussians associated with arbitrary positive-definite bilinear forms can be
added in a follow-up PR.
Closes #33072 |
t-analysis
new-contributor
|
235/0 |
Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Gaussian/SchwartzMap.lean |
2 |
5 |
['CoolRmal', 'LLaurance', 'github-actions'] |
nobody |
28-79081 28 days ago |
127-2937 127 days ago |
0-96 1 minute |
| 39791 |
zixiaowang17 author:zixiaowang17 |
feat(Probability/HypothesisTesting): add Neyman-Pearson lemma |
This PR adds `Probability/HypothesisTesting/NeymanPearson.lean`, formalizing the classical Neyman-Pearson lemma with reference
Ingster, Y. and Suslina, I.A., 2012. Nonparametric goodness-of-fit testing under Gaussian models (Vol. 169). Springer Science & Business Media.
-/
The main definitions are:
* `ProbabilityTheory.NeymanPearson.npLikelihoodRatio`
* `ProbabilityTheory.NeymanPearson.npTest`
* `ProbabilityTheory.NeymanPearson.npSumError`
The main theorem is:
* `ProbabilityTheory.NeymanPearson.neyman_pearson`
We state the theorem in the weighted form `∫ T dP + t * ∫ (1 - T) dQ`, over measurable tests T : Ω → ℝ with values in [0, 1], using P + Q as the canonical dominating measure; rather than starting with the constrained formulation that fixes the Type I error and minimizes the Type II error. The reasons are two fold.
First, it can be thought as the Lagrangian form of the classical constrained Neyman-Pearson problem.
Second, this weighted form is often arises in applications, such as, in minimax lower-bound arguments for functional estimation, where one typically reduces estimation lower bounds to testing inequalities involving weighted sums of error probabilities.
Worflow with AI: we first manually wrote a blueprint in latex with every definition and lemma we need [NL_Blueprint_NP_Lemma.pdf](https://github.com/user-attachments/files/28199645/NL_Blueprint_NP_Lemma.pdf). then we checked the Mathlib API with claude code, chatgpt and LeanSearch, We manually wrote the outline, in the outline version we deleted the discussion on gamma in the blueprint - since we have used the version of the NP lemma that uses the likelihood ratio to construct the test, rather than writing in terms of comparisons of Radon-Nikodym derivatives with a common dominating measure, and hence have used gamma to arbitrarily define likelihood-ratio sets of measure zero under the null hypothesis. This choice is motivated by the downstream derivation of errors of NP tests. since we are unfamiliar with mathlib naming style, we used claude code skill for proof golfing and some syntax correction, eg whether should use unfold or simp only [];
Co-authored-by: Rajarshi Mukherjee <ram521@mail.harvard.edu>
--- |
t-measure-probability
new-contributor
LLM-generated
merge-conflict
|
179/0 |
Mathlib.lean,Mathlib/Probability/Decision/HypothesisTesting/NeymanPearson.lean |
2 |
4 |
['github-actions', 'grunweg', 'mathlib-merge-conflicts'] |
nobody |
28-78053 28 days ago |
48-77377 48 days ago |
0-289 4 minutes |
| 40495 |
gw90 author:gw90 |
feat: weighted graphs with killing term |
Adding basic definitions and API for weighted graphs and weighted graphs with killing term.
---
My goal is to develop the basic theory from the beginning of [this textbook](https://www.math.uni-potsdam.de/fileadmin/user_upload/Prof-GraphTh/Keller/KellerLenzWojciechowski_GraphsAndDiscreteDirichletSpaces_wu_version.pdf). I also have some definitions and lemmas regarding Dirichlet forms and Laplacians to PR later, but I tried to pare down this first PR as much as possible. It currently has only 4 main definitions and sufficient API to demonstrate their correctness.
Note that I did not use [SimpleGraph.edgeLabeling](https://leanprover-community.github.io/mathlib4_docs/find/?pattern=SimpleGraph.EdgeLabeling#doc) for the edgeWeight function because it is important that vertices that are not adjacent have an edge weight of zero. That is, the edgeWeight must be defined for all pairs of vertices and respect the underlying adjacency relation on the graph.
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|
t-combinatorics
new-contributor
|
368/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Weighted/Basic.lean,docs/references.bib |
3 |
2 |
['github-actions'] |
nobody |
28-76021 28 days ago |
30-61656 30 days ago |
30-61306 30 days |
| 35017 |
robo7179 author:robo7179 |
feat(Combinatorics/SimpleGraph/Acyclic): every nontrivial tree has at least two leaves |
Add two theorems to prove that every non trivial tree has at least two leaves (one in Finite the other in Acyclic).
---
- [x] depends on: #37399
- [x] depends on: #37400
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|
t-combinatorics
new-contributor
awaiting-author
merge-conflict
|
24/0 |
Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean |
2 |
46 |
['IvanRenison', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'robo7179'] |
YaelDillies assignee:YaelDillies |
27-70921 27 days ago |
117-6635 117 days ago |
35-3753 35 days |
| 40615 |
SnkXyx author:SnkXyx |
feat(Algebra/MvPolynomial/CharacteristicSet): add pseudo division for TriangularSet |
This PR defines the **pseudo division** for a triangular set:
* `MvPolynomial.serPseudo g S`: Pseudo-division of a multivariate polynomial `g` by a triangular set `S`, which pseudo-divides `g` successively by elements of `S`.
* `MvPolynomial.IsSetRemainder r g S`: A remainder `r` of `g` by `S` is a polynomial which is reduced with respect to `S` and
suffices `(∏ i, (S i).initial ^ es[i]) * g = (∑ i, qs[i] * S i) + r` for some `es : List ℕ` and `qs : List (MvPolynomial σ R)`.
The definition and supporting results on `pseudo` used in this development were introduced in PR #40614 .
The definition was originally developed in PR #36103 as part of the formalization of the Characteristic Set Method (Wu-Ritt Method). The Characteristic Set project aims to formalize the algorithmic method for solving systems of multivariate polynomial equations in Lean 4, providing foundational infrastructure for algebraic geometry based on triangular decomposition.
---
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- [ ] depends on: #40538
- [ ] depends on: #40542
- [ ] depends on: #40543
- [ ] depends on: #40614
[](https://gitpod.io/from-referrer/)
|
WIP
t-algebra
new-contributor
blocked-by-other-PR
label:t-algebra$ |
1849/0 |
Mathlib.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/PseudoDivision.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/Reduced.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/TriangularSet.lean,Mathlib/Algebra/MvPolynomial/Initial.lean,Mathlib/Algebra/MvPolynomial/Variables.lean |
6 |
4 |
['SnkXyx', 'github-actions', 'mathlib-dependent-issues'] |
nobody |
27-45895 27 days ago |
27-50730 27 days ago |
0-15 15 seconds |
| 40614 |
SnkXyx author:SnkXyx |
feat(Algebra/MvPolynomial/CharacteristicSet): add pseudo division for MvPolynomial |
This PR defines the **pseudo division** for a multivariate polynomial:
* `MvPolynomial.pseudoOf i g f`: Pseudo-division of `g` by `f` with respect to a variable `i`, computes `q` and `r` such that `f.initialOf i ^ s * g = q * f + r`, where `r.degreeOf i < f.degreeOf i`
* `MvPolynomial.pseudo g f`: pseudo-division of `g` by `f`. If `f` is non-constant, it performs pseudo-division with respect to `f.vars.max`.
The definition was originally developed in PR #36103 as part of the formalization of the Characteristic Set Method (Wu-Ritt Method). The Characteristic Set project aims to formalize the algorithmic method for solving systems of multivariate polynomial equations in Lean 4, providing foundational infrastructure for algebraic geometry based on triangular decomposition.
---
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- [ ] depends on: #40538
- [ ] depends on: #40542
[](https://gitpod.io/from-referrer/)
|
WIP
t-algebra
new-contributor
blocked-by-other-PR
label:t-algebra$ |
935/0 |
Mathlib.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/PseudoDivision.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/Reduced.lean,Mathlib/Algebra/MvPolynomial/Initial.lean |
4 |
4 |
['SnkXyx', 'github-actions', 'mathlib-dependent-issues'] |
nobody |
27-45894 27 days ago |
27-51309 27 days ago |
0-29 29 seconds |
| 40619 |
SnkXyx author:SnkXyx |
feat(Algebra/MvPolynomial/CharacteristicSet): add ascending set and basic set |
This PR defines a class `AscendingSetTheory`, the abstract theory of **ascending sets** and **basic sets**.
An ascending set is a triangular set with additional reduction properties.
A basic set is the "smallest" ascending set contained in a given set of polynomials.
The class requires three paramaters, the last one is a predicate `TriangularSet σ R → Prop`, indicating whether an triangular set is an ascending set.
Different instances can implement Ritt's ascending sets or Wu's ascending sets.
The definition was originally developed in PR #36103 as part of the formalization of the Characteristic Set Method (Wu-Ritt Method). The Characteristic Set project aims to formalize the algorithmic method for solving systems of multivariate polynomial equations in Lean 4, providing foundational infrastructure for algebraic geometry based on triangular decomposition.
---
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- [ ] depends on: #40537
- [ ] depends on: #40542
- [ ] depends on: #40543
- [ ] depends on: #40544
[](https://gitpod.io/from-referrer/)
|
WIP
t-algebra
new-contributor
blocked-by-other-PR
label:t-algebra$ |
2589/0 |
Mathlib.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/AscendingSet.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/Rank.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/Reduced.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/TriangularSet.lean,Mathlib/Algebra/MvPolynomial/Initial.lean,Mathlib/Algebra/MvPolynomial/Variables.lean |
7 |
4 |
['SnkXyx', 'github-actions', 'mathlib-dependent-issues'] |
nobody |
27-38170 27 days ago |
27-42719 27 days ago |
0-35 35 seconds |
| 40617 |
SnkXyx author:SnkXyx |
feat(Algebra/MvPolynomial/CharacteristicSet): define rank for TriangularSet |
This PR defines the **rank** of a triangular set:
* `TriangularSet.rank`: The rank of a triangular set is a lexicographic sequence of ranks of its polynomials.
A more intuitive definition is `rank_lt_iff`, `S < T` if one of the following two occurs:
1. There exists some `k < S.length` such that
`S₀ ≈ T₀`, `S₁ ≈ T₁`, ..., `Sₖ₋₁ ≈ Tₖ₋₁` and `Sₖ < Tₖ`.
2. `S.length > T.length` and `∀ i < T.length, Sᵢ ≈ Tᵢ`
The rank induces a natural preorder on triangular sets. The definition and supporting results on `TriangularSet` and rank of `MvPolynomial` used in this development were respectively introduced in PR #40543 and PR #40544 .
This definition was originally developed in PR #36103 as part of the formalization of the Characteristic Set Method (Wu-Ritt Method). The Characteristic Set project aims to formalize the algorithmic method for solving systems of multivariate polynomial equations in Lean 4, providing foundational infrastructure for algebraic geometry based on triangular decomposition.
---
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- [ ] depends on: #40537
- [ ] depends on: #40543
- [ ] depends on: #40544
[](https://gitpod.io/from-referrer/)
|
WIP
t-algebra
new-contributor
blocked-by-other-PR
label:t-algebra$ |
1652/0 |
Mathlib.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/Rank.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/TriangularSet.lean,Mathlib/Algebra/MvPolynomial/Initial.lean,Mathlib/Algebra/MvPolynomial/Variables.lean |
5 |
4 |
['SnkXyx', 'github-actions', 'mathlib-dependent-issues'] |
nobody |
27-38168 27 days ago |
27-44489 27 days ago |
0-39 39 seconds |
| 36103 |
SnkXyx author:SnkXyx |
feat(Algebra/MvPolynomial/CharacteristicSet): add Characteristic Set |
This PR adds some definitions and theorems of Characteristic Set Method (also known as Wu's Method).
This pr aims to formalize the algorithmic method for solving systems of multivariate polynomial equations in Lean 4, providing foundational infrastructure for algebraic geometry based on triangular decomposition.
Main Result:
* `MvPolynomial.List.vanishingSet_eq_zeroDecomposition_union`: The zero set of a polynomial system $PS$ can be decomposed into a finite union of "quasi-varieties" defined by triangular sets:
$Zero(PS) = \bigcup_{CS \in \mathcal{ZD}} Zero(CS / \text{InitialProd}(CS))$
The PR is upstreamized from [github.com/WuProver/lean_characteristic_set](https://github.com/WuProver/lean_characteristic_set)
---
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-->
- [x] depends on: #36386
- [x] depends on: #37791
- [ ] depends on: #40537
- [ ] depends on: #40538
- [ ] depends on: #40542
- [ ] depends on: #40543
- [ ] depends on: #40544
- [ ] depends on: #40614
- [ ] depends on: #40615
- [ ] depends on: #40617
- [ ] depends on: #40619
[](https://gitpod.io/from-referrer/) |
t-algebra
new-contributor
WIP
blocked-by-other-PR
label:t-algebra$ |
3627/0 |
Mathlib.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/AscendingSet.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/CharacteristicSet.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/PseudoDivision.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/Rank.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/Reduced.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/TriangularSet.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/MvPolynomial/Initial.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,docs/references.bib |
11 |
26 |
['Hagb', 'SnkXyx', 'faenuccio', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
27-25592 27 days ago |
33-38169 33 days ago |
36-65702 36 days |
| 39579 |
hawkrobe author:hawkrobe |
feat(RingTheory): Bialgebra / Hopf algebra structure on SymmetricAlgebra |
Adds Hopf algebra structure on SymmetricAlgebra.
---
- [x] depends on: #39483
- [x] depends on: #39785
- [ ] depends on: #39841
- [ ] depends on: #31898
- [ ] depends on: #39790 |
t-ring-theory
new-contributor
blocked-by-other-PR
merge-conflict
|
691/22 |
Mathlib.lean,Mathlib/LinearAlgebra/TensorAlgebra/Basic.lean,Mathlib/RingTheory/Bialgebra/Primitive.lean,Mathlib/RingTheory/Bialgebra/Quotient.lean,Mathlib/RingTheory/Bialgebra/SymmetricAlgebra.lean,Mathlib/RingTheory/Bialgebra/TensorAlgebra.lean,Mathlib/RingTheory/Coalgebra/Quotient.lean,Mathlib/RingTheory/HopfAlgebra/Generators.lean,Mathlib/RingTheory/HopfAlgebra/Primitive.lean,Mathlib/RingTheory/HopfAlgebra/Quotient.lean,Mathlib/RingTheory/HopfAlgebra/SymmetricAlgebra.lean,Mathlib/RingTheory/HopfAlgebra/TensorAlgebra.lean |
12 |
14 |
['YaelDillies', 'github-actions', 'hawkrobe', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
YaelDillies assignee:YaelDillies |
26-82661 26 days ago |
48-82093 48 days ago |
1-18386 1 day |
| 39256 |
Sfgangloff author:Sfgangloff |
feat(SymbolicDynamics): add monotonicity lemma for LanguageOn |
In Symbolic dynamics.
Proof that the language of a set of configurations is monotone with respect to inclusion of configuration sets:
X ⊆ Y → LanguageOn X U ⊆ LanguageOn Y U
The proof is a direct unfolding of definitions: a pattern in the language of X comes from restricting some configuration x ∈ X, and inclusion X ⊆ Y allows the same witness to be used for Y.
Related to issue #39252 |
t-dynamics
new-contributor
awaiting-author
|
9/1 |
Mathlib/Dynamics/SymbolicDynamics/Basic.lean |
1 |
4 |
['github-actions', 'sgouezel'] |
sgouezel assignee:sgouezel |
26-20833 26 days ago |
26-20833 26 days ago |
34-79890 34 days |
| 38309 |
ntapiam author:ntapiam |
feat(Algebra/NonAssoc): dendriform algebras |
This PR introduces dendriform structures such as dendriform semirings
and algebras, and proves basic facts linking them to their pre-Lie
counterparts.
---
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|
t-algebra
new-contributor
awaiting-author
label:t-algebra$ |
270/0 |
Mathlib.lean,Mathlib/Algebra/NonAssoc/Dendriform/Defs.lean,docs/references.bib |
3 |
7 |
['YaelDillies', 'dagurtomas', 'github-actions', 'ntapiam'] |
ocfnash assignee:ocfnash |
26-20290 26 days ago |
26-20290 26 days ago |
54-13016 54 days |
| 39162 |
anovickis author:anovickis |
feat(Topology/PartitionOfUnity): add pointwise_decomposition_finsum + companions |
Add three short lemmas to `Mathlib/Topology/PartitionOfUnity.lean` extending the existing `PartitionOfUnity` API:
- `pointwise_decomposition_finsum` — for `f : X → ℝ` and `x ∈ s`, `f x = ∑ᶠ i, ρ i x · f x`. This is the pointwise step that lifts to integral linearity in measure-theoretic PoU integration: `∫_s f dμ = ∑ᶠ i, ∫_s (ρ i · f) dμ`.
- `one_minus_sum_nonneg` — `0 ≤ 1 - ∑ᶠ i, ρ i x`. Direct rearrangement of the existing `sum_le_one` field; useful as a complement-mass remainder bound in chart-by-chart estimates.
- `abs_le_one` — `|ρ i x| ≤ 1`. Combines the existing `nonneg` and `le_one`; convenience for absolute-value bounds.
All three are short proofs using existing structure fields (`sum_eq_one`, `sum_le_one`, `nonneg`, `le_one`).
These came up while writing chart-by-chart Stokes-on-manifold estimates where one wants to decompose `∫_M f` into chart-supported pieces using a partition of unity. The pointwise identity is the obvious first step; the other two are complementary algebraic bounds that show up in remainder estimates.
---
🤖 Generated with [Claude Code](https://claude.com/claude-code) |
t-topology
new-contributor
LLM-generated
awaiting-author
|
27/0 |
Mathlib/Topology/PartitionOfUnity.lean |
1 |
6 |
['github-actions', 'j-loreaux'] |
j-loreaux assignee:j-loreaux |
25-83552 25 days ago |
25-83552 25 days ago |
36-60965 36 days |
| 26413 |
michaellee94 author:michaellee94 |
feat: existence of maximal solutions for ODEs meeting Picard-Lindelöf conditions |
Add existence proof for maximal solution of ODE using Picard-Lindelöf and a uniqueness theorem using Grönwall's lemma.
---
- [x] depends on: #26382
- [x] depends on: #29186
- [x] depends on: #35043
- [ ] depends on: #40687
[](https://gitpod.io/from-referrer/) |
new-contributor
t-analysis
blocked-by-other-PR
|
662/1 |
Mathlib.lean,Mathlib/Analysis/ODE/ExistUnique.lean,Mathlib/Analysis/ODE/MaximalSolution.lean,docs/undergrad.yaml |
4 |
114 |
['botbaki-review', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'michaellee94', 'winstonyin'] |
nobody |
25-19429 25 days ago |
25-76555 25 days ago |
0-7993 2 hours |
| 40599 |
ChiCubed author:ChiCubed |
feat(LinearAlgebra): rank-nullity theorems for Submodule map/comap |
We show forms of the rank-nullity theorem involving `Submodule.map` and `Submodule.comap`. Together with `LinearMap.ker_comp` this provides a formula for the rank of the kernel of a composite (and, in finite dimensions at least, for the rank of the range).
---
I didn't explicitly write the aforementioned formula for rank ker (f ∘ g) since it is just `LinearMap.ker_comp` followed by `LinearMap.lift_rank_comap`, but perhaps it should be added for discoverability?
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t-algebra
new-contributor
label:t-algebra$ |
58/8 |
Mathlib/Algebra/Module/Submodule/Ker.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Module/Submodule/Range.lean,Mathlib/LinearAlgebra/Dimension/RankNullity.lean |
4 |
5 |
['ChiCubed', 'github-actions', 'themathqueen', 'wwylele'] |
nobody |
25-18160 25 days ago |
28-4369 28 days ago |
28-5989 28 days |
| 40641 |
ayhon author:ayhon |
feat: binder plicity code action |
A code action which allows users to switch between implicit and explicit binders.
Developed live during the [Meta Café](https://leanprover.zulipchat.com/#narrow/channel/579629-Event-announcements/topic/The.20Meta.20Caf.C3.A9/with/601800951) with the guidance of @thorimur and various others.
---
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|
t-meta
new-contributor
large-import
|
98/0 |
Mathlib/Init.lean,Mathlib/Util/BinderPlicity.lean,MathlibTest/BinderPlicity.lean |
3 |
41 |
['ayhon', 'eric-wieser', 'github-actions', 'thorimur'] |
thorimur assignee:thorimur |
24-84631 24 days ago |
25-36451 25 days ago |
0-3347 55 minutes |
| 38606 |
dennj author:dennj |
feat: preparation for Vanishing Sum of Roots of Unity |
Adds the Mathlib API extensions needed for an upcoming formalization of the Lam-style classification theorem for vanishing sums of roots of unity.
* Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean
+ `exists_eq_const_of_sum_smul_eq_zero_of_sum_eq_zero_of_linearIndependent`: if `∑ vᵢ = 0` and the first `n-1` of `n` vectors are linearly independent, every linear relation has constant coefficients.
* Mathlib/RingTheory/Radical/NatInt.lean
+ `Nat.totient_eq_div_radical_mul_totient_radical`: Euler's totient splits as `φ(n) = (n / rad n) * φ(rad n)`.
* Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean
+ `IsPrimitiveRoot.sum_range_pow_mul_div_eq_zero_of_dvd`: the `d` evenly-spaced powers of a primitive `k`-th root sum to zero, for `d ∣ k` and `1 < d`.
* Mathlib/NumberTheory/Cyclotomic/LinearDisjoint.lean (new)
+ `IsPrimitiveRoot.linearDisjoint_adjoin_pow_of_coprime`: cyclotomic subfields of coprime orders are linearly disjoint over `ℚ`.
* Mathlib/NumberTheory/Cyclotomic/LinearRelations.lean (new)
+ `IsPrimitiveRoot.coeffs_eq_of_sum_pow_eq_zero_prime_coprime`: in the cyclotomic field of order `p * m` with `p` prime coprime to `m`, any `ℚ⟮ζ^p⟯`-linear relation among powers of `ζ^m` has all coefficients equal.
---
I need these as preparation to start formalizing the theorem:
Let k be a positive integer. If a finite family of complex k-th roots of unity sums to zero, then the size of the family is a non-negative integer combination of the prime divisors of k.
---
Human-made PR with AI used for golfing and documentation |
new-contributor |
219/0 |
Mathlib.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/NumberTheory/Cyclotomic/LinearDisjoint.lean,Mathlib/NumberTheory/Cyclotomic/LinearRelations.lean,Mathlib/RingTheory/Radical/Totient.lean,Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean |
6 |
4 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
24-62448 24 days ago |
24-64498 24 days ago |
33-9396 33 days |
| 39518 |
abeldonate author:abeldonate |
feat(RingTheory/LocalProperties/Projective): Projective Module theorem |
Theorem: R Noetherian, M finitely generated R-Mod. Then:
M projective iff M_m free for all m maximal
|
t-ring-theory
new-contributor
large-import
awaiting-author
|
21/0 |
Mathlib/RingTheory/LocalProperties/Projective.lean |
1 |
11 |
['abeldonate', 'github-actions', 'jjdishere', 'mbkybky', 'vlad902'] |
jjdishere assignee:jjdishere |
24-54760 24 days ago |
24-54780 24 days ago |
30-2702 30 days |
| 40538 |
SnkXyx author:SnkXyx |
feat(Algebra/MvPolynomial): define initial for MvPolynomial |
This PR defines the **initialOf** and **initial** of a multivariate polynomial:
* `MvPolynomial.initialOf`: The initial of `p` with respect to a specific variable `i` is the coefficient of `X i ^ degᵢ(p)` (a polynomial).
* `MvPolynomial.initial`: The initial of `p` with respect to its max variable.
The definition was originally developed in PR #36103 as part of the formalization of the Characteristic Set Method (Wu-Ritt Method). The Characteristic Set project aims to formalize the algorithmic method for solving systems of multivariate polynomial equations in Lean 4, providing foundational infrastructure for algebraic geometry based on triangular decomposition.
---
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|
WIP
t-algebra
new-contributor
label:t-algebra$ |
484/0 |
Mathlib.lean,Mathlib/Algebra/MvPolynomial/Initial.lean |
2 |
2 |
['github-actions'] |
nobody |
24-52317 24 days ago |
30-33081 30 days ago |
0-77 1 minute |
| 40542 |
SnkXyx author:SnkXyx |
feat(Algebra/MvPolynomial/CharacteristicSet): define reduction relation for MvPolynomial |
This PR defines the **reducedTo** for a multivariate polynomial:
* `MvPolynomial.reducedTo`: A polynomial `q` is reduced with respect to `p` if either `q = 0` or the degree of `q` in `p`'s main variable is strictly less than the degree of `p`.
* `MvPolynomial.reducedToSet`: `q` is reduced with respect to a set if it is reduced with respect to all elements of the set.
The definition was originally developed in PR #36103 as part of the formalization of the Characteristic Set Method (Wu-Ritt Method). The Characteristic Set project aims to formalize the algorithmic method for solving systems of multivariate polynomial equations in Lean 4, providing foundational infrastructure for algebraic geometry based on triangular decomposition.
---
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|
WIP
t-algebra
new-contributor
label:t-algebra$ |
100/0 |
Mathlib.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/Reduced.lean |
2 |
3 |
['SnkXyx', 'github-actions'] |
nobody |
24-35506 24 days ago |
30-21784 30 days ago |
0-15 15 seconds |
| 40741 |
AntoineduFresne author:AntoineduFresne |
feat(order): dilworth's and mirsky's theorems for finite orders |
I add Dilworth's theorem and its order dual, Mirsky's theorem, for finite subsets of a partial order, together with the order-theoretic lemmas they rest on.
A prior external formalization by Vlad Tsyrklevich is linked from `1000.yaml`; this is an independent `Finset`-based development using Galvin's proof, and I agreed the `1000.yaml` update with him.
I split the min-max content, as for Hall's marriage theorem, into a weak-duality inequality and a strong-duality existence of a matching pair, so I never define an extremal quantity over families of sets (no `Finset.min'` / `Finset.max'`):
- `dilworth` / `mirsky` — an antichain and a chain cover (resp. a chain and an antichain cover) of equal size;
- `antichain_le_chain_cover` / `chain_le_antichain_cover` — the weak-duality inequalities, for an arbitrary relation;
- `dilworth_partition` / `mirsky_partition` — the same with a pairwise-disjoint partition.
For Dilworth I use Galvin's induction (gluing step `chainCover_glue`); I avoid the König /
bipartite-matching route since König isn't in Mathlib yet (at least last time I checked). I prove Mirsky directly (peeling off minimal elements) rather than via `OrderDual`, since the direct induction seems simpler to me and the two proofs already share their foundations (the closure lemmas and the injective weak dualities).
Internally I work with an injection `f : α → Finset α` on the antichain rather than with the
`Finset (Finset α)` cover directly, so distinctness of the chains comes from the antichain property instead of a separate bookkeeping.
## Questions I'd like input on
1. Explicit min-max? I give weak duality plus a matching pair, from which "largest antichain = smallest chain cover" follows; I do not state that equality as a single theorem (doing so would, I think, mean defining the extremal quantities I wanted to avoid). Would you also like an explicit min-max statement?
2. Two layers of weak duality. I expose it twice: an injective form (`IsAntichain.exists_injOn_mem_chains`, over an arbitrary relation and an arbitrary index type, no finiteness) and a `Finset` cardinality form (`antichain_le_chain_cover`), the latter a one-line specialization of the former. I'm not sure whether exposing both is right, or whether one of them should be canonical. And is there appetite to push the general core to an `ℕ∞` / infinite version, or is the finite form the right scope here?
3. `[DecidableEq α]` on the main theorems. It comes only from writing the cover as
`s = 𝒞.biUnion id` (`Finset.biUnion` needs it); a membership-form coverage condition such as `∀ x, x ∈ s ↔ ∃ C ∈ 𝒞, x ∈ C` would drop the assumption, though it seems to me a bit less readable. Which do you prefer? (I think the injective-form weak dualities assume neither order, finiteness, nor `DecidableEq`.)
4. Naming. I use `C` / `A` for a chain / antichain and `𝒞` / `𝒜` for a chain / antichain cover (for hopefully obvious reason). Happy to change these if you would prefer something else.
## Open questions
- File placement (`Mathlib/Order/Dilworth.lean`?), and whether the general lemmas (the antichain closures, the injective transversal and weak dualities) should live in existing files (`Mathlib/Order/Antichain.lean`, `Mathlib/Order/UpperLower/…`) rather than in a new file.
Zulip: https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Antoine.20du.20Fresne.20von.20Hohenesche/with/604112426
AI use: I worked out all proofs on paper first and most of the design structure of the file. I then used Claude Code (Claude Opus) to transcribe my paper proofs into Lean, weaken hypotheses, reduce redundancy, and fix comment typos. |
t-order
new-contributor
LLM-generated
|
610/3 |
Mathlib.lean,Mathlib/Order/Dilworth.lean,docs/1000.yaml |
3 |
6 |
['AntoineduFresne', 'SnirBroshi', 'github-actions'] |
nobody |
24-35128 24 days ago |
24-41971 24 days ago |
24-42783 24 days |
| 40544 |
SnkXyx author:SnkXyx |
feat(Algebra/MvPolynomial/CharacteristicSet): define rank for MvPolynomial |
This PR defines the **rank** of a multivariate polynomial:
* `MvPolynomial.rank`: the rank of a polynomial `p` is the pair `(maxVar p, mainDegree p)` ordered lexicographically.
The rank induces a natural preorder on multivariate polynomials by comparing first their main variables and then their main degrees. The definition and supporting results on `mainDegree` used in this development were introduced in PR #40537.
This definition was originally developed in PR #36103 as part of the formalization of the Characteristic Set Method (Wu-Ritt Method). The Characteristic Set project aims to formalize the algorithmic method for solving systems of multivariate polynomial equations in Lean 4, providing foundational infrastructure for algebraic geometry based on triangular decomposition.
---
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git commit --author="Author Name <author@email.com>" --allow-empty -m "add Author Name as coauthor"
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Moves:
- Vector.* -> List.Vector.*
- ...
Deletions:
- Nat.bit1_add_bit1
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Any other comments you want to keep out of the PR commit should go
below the `---`, and placed outside this HTML comment, or else they
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- [ ] depends on: #xyz [optional extra text]
-->
- [ ] depends on: #40537
[](https://gitpod.io/from-referrer/)
|
WIP
t-algebra
new-contributor
blocked-by-other-PR
label:t-algebra$ |
232/0 |
Mathlib.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/Rank.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/MvPolynomial/Variables.lean |
4 |
8 |
['SnkXyx', 'faenuccio', 'github-actions', 'leanprover-radar', 'mathlib-dependent-issues'] |
nobody |
24-25429 24 days ago |
30-19623 30 days ago |
0-61 1 minute |
| 39410 |
RaggedR author:RaggedR |
feat(RingTheory/HopfAlgebra): Hopf algebra structure on polynomials (𝔾ₐ) |
This is the beginning of a formalization of the first half of my masters thesis (https://arxiv.org/abs/0907.3950).
In particular we look at the ring of polynomials in a single variable with the usual multiplication and coproduct given by: Δ(X) = X ⊗ 1 + 1 ⊗ X. The counit is evaluation at zero, and the antipode is S(x) = -x.
The mathematics itself comes from my masters thesis (and is well known). This is a first step towards an implementation of the umbral calculus of Gian-Carlo Rota and then its generalization to Symmetric Functions (which I believe is original).
---
[](https://gitpod.io/from-referrer/)
---
LLM tools were used to assist with Lean formalization. The mathematical content is the author's own work. |
t-ring-theory
new-contributor
LLM-generated
awaiting-author
|
205/0 |
Mathlib.lean,Mathlib/RingTheory/HopfAlgebra/Polynomial.lean |
2 |
30 |
['RaggedR', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'themathqueen', 'wwylele'] |
nobody |
24-13188 24 days ago |
51-85070 51 days ago |
6-19410 6 days |
| 40791 |
vvvv-ops author:vvvv-ops |
feat(RingTheory/DedekindDomain): dirichlet's s-unit theorem |
Proves the `Future work` of `RingTheory/DedekindDomain/SInteger.lean`: finite generation of `S`-units and Dirichlet's `S`-unit theorem.
For a Dedekind domain `R` with fraction field `K` and a finite set `S` of height-one primes, this adds the `S`-valuation map `Set.unitValuation` with kernel the `∅`-units (`Set.unitValuation_ker`), finite generation `Set.unit_fg`, and the exact rank `Set.finrank_eq`: `finrank ℤ (Additive 𝒪_{K,S}ˣ) = finrank ℤ (Additive 𝒪_Kˣ) + |S|`, plus the number-field specialisation `Set.unit_finrank_numberField` (`= (r₁ + r₂ - 1) + |S|`). The proof uses the short exact sequence `1 → 𝒪_Kˣ → 𝒪_{K,S}ˣ → ⊕_{v∈S} ℤ`: the kernel is the units, and the image has finite index because its cokernel embeds in the (finite) class group.
The general finiteness helpers `Module.Finite.of_fg_ker_of_fg_range`, `CommGroup.fg_of_fg_ker_of_fg_range`, `Subgroup.fg_of_fg_commGroup` are included in the file for now — happy to move them to `RingTheory/Finiteness` / `GroupTheory/Finiteness` if preferred.
|
t-ring-theory
new-contributor
|
339/0 |
Mathlib.lean,Mathlib/RingTheory/DedekindDomain/SUnit.lean,scripts/noshake.json |
3 |
3 |
['github-actions'] |
nobody |
23-48214 23 days ago |
23-51102 23 days ago |
23-50752 23 days |
| 40579 |
jcreinhold author:jcreinhold |
feat(Algebra/Category/Ring): preserve limits to CommMonCat |
Adds the missing instance saying that forgetting a commutative ring to its multiplicative commutative monoid preserves limits. |
t-algebra
new-contributor
label:t-algebra$ |
7/0 |
Mathlib/Algebra/Category/Ring/Limits.lean |
1 |
7 |
['felixpernegger', 'github-actions', 'jcreinhold'] |
nobody |
23-45833 23 days ago |
28-30905 28 days ago |
28-39029 28 days |
| 40498 |
wangying11123 author:wangying11123 |
feat(Geometry/Euclidean): unoriented angle eq of oriented angle eq |
This PR adds two theorems to Mathlib/Geometry/Euclidean/Angle/Oriented/Affine.lean
`angle_eq_of_oangle_eq`: If two oriented angles are equal, and the four endpoint pairs are nondegenerate, then the
corresponding unoriented angles are equal.
`angle_eq_of_oangle_eq_not_collinear`: If two oriented angles are equal, and the first triple is not collinear, then the
corresponding unoriented angles are equal. |
new-contributor |
22/0 |
Mathlib/Geometry/Euclidean/Angle/Oriented/Affine.lean |
1 |
2 |
['github-actions'] |
nobody |
23-18897 23 days ago |
31-24986 31 days ago |
31-24687 31 days |
| 39981 |
MarAndrey77 author:MarAndrey77 |
feat(Analysis/Convex): prove Shapley-Folkman lemma |
## Summary
This PR adds a formal proof of the Shapley-Folkman lemma for finite sums of sets in finite-dimensional real vector spaces.
The main theorem states that if a point belongs to a finite sum of convex hulls, then it can be represented as a sum where all but at most `finrank ℝ E` terms belong to the original sets.
## Main declarations
* `shapley_folkman`
* `shapley_folkman_exists_choice`
* `ShapleyFolkmanRep.nonsingleton_card_le_finrank_of_minimal`
## Implementation notes
The proof uses a minimal-complexity representation and a perturbation argument to bound the number of nonsingleton convex combinations by `Module.finrank ℝ E`.
## AI usage
AI assistance was used during this project. In particular, it was used to help identify existing Mathlib theorems that could be useful for the proof, and to analyze Lean error messages while debugging the formalization.
## Checks
* `lake exe mk_all`
* `lake build Mathlib.Analysis.Convex.ShapleyFolkman`
* no `sorry`
* no linter warnings |
awaiting-author
t-analysis
new-contributor
|
1297/0 |
Mathlib.lean,Mathlib/Analysis/Convex/ShapleyFolkman.lean |
2 |
10 |
['MarAndrey77', 'github-actions', 'grunweg', 'wwylele'] |
nobody |
23-11545 23 days ago |
45-5482 45 days ago |
0-123 2 minutes |
| 36757 |
alok author:alok |
feat(Order/Filter): add Filter.IsFree and Filter.IsNonprincipal |
## Summary
Adds two filter predicates and their basic API:
- **`Filter.IsFree`**: no point belongs to every set (`f.ker = ∅`), equivalently `f ≤ cofinite`
- **`Filter.IsNonprincipal`**: not equal to `𝓟 s` for any set `s`
Every free `NeBot` filter is non-principal (`IsFree.isNonprincipal`), but the converse fails for general filters (e.g. `𝓝 x` in a non-discrete T₁ space is non-principal but not free). For ultrafilters the two notions coincide (`Ultrafilter.isNonprincipal_iff_isFree`).
On finite types, no `NeBot` filter is free (`not_isFree_of_neBot`).
## Test plan
- [x] `lake build Mathlib.Order.Filter.Cofinite` passes
- [x] `lake build Mathlib.Order.Filter.Ultrafilter.Basic` passes
🤖 Generated with [Claude Code](https://claude.com/claude-code) |
t-order
new-contributor
LLM-generated
|
98/1 |
Mathlib/Order/Filter/Cofinite.lean,Mathlib/Order/Filter/Ultrafilter/Basic.lean |
2 |
3 |
['felixpernegger', 'github-actions'] |
nobody |
22-82011 22 days ago |
117-52343 117 days ago |
0-3928 1 hour |
| 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
<!-- 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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details. Please leave a blank newline before the `---`, otherwise GitHub
will format the text above it as a title.
For details on the "pull request lifecycle" in mathlib, please see:
https://leanprover-community.github.io/contribute/index.html
In particular, note that most reviewers will only notice your PR
if it passes the continuous integration checks.
Please ask for help on https://leanprover.zulipchat.com if needed.
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listing all co-authors.
Co-authors in the squash commit are gathered from two sources:
First, all authors of commits to this PR branch are included. Thus,
one way to add co-authors is to include at least one commit authored by
each co-author among the commits in the pull request. If necessary, you
may create empty commits to indicate co-authorship, using commands like so:
git commit --author="Author Name <author@email.com>" --allow-empty -m "add Author Name as coauthor"
Second, co-authors can also be listed in lines at the very bottom of
the commit message (that is, directly before the `---`) using the following format:
Co-authored-by: Author Name <author@email.com>
If you are moving or deleting declarations, please include these lines
at the bottom of the commit message (before the `---`, and also before
any "Co-authored-by" lines) using the following format:
Moves:
- Vector.* -> List.Vector.*
- ...
Deletions:
- Nat.bit1_add_bit1
- ...
Any other comments you want to keep out of the PR commit should go
below the `---`, and placed outside this HTML comment, or else they
will be invisible to reviewers.
If this PR depends on other PRs, please list them below this comment,
using the following format:
- [ ] depends on: #abc [optional extra text]
- [ ] depends on: #xyz [optional extra text]
-->
[](https://gitpod.io/from-referrer/)
|
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 |
22-75088 22 days ago |
202-4396 202 days ago |
10-66980 10 days |
| 40677 |
nrs-status author:nrs-status |
chore: update `Data.PFunctor.Univariate.M` docstring with example usage |
It is not clear how to make use of the `PFunctor.M` API, an example is added.
Following https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Possibly.20infinite.20trees/near/592161797 |
t-data
new-contributor
|
37/0 |
Mathlib/Data/PFunctor/Univariate/M.lean |
1 |
11 |
['eric-wieser', 'github-actions', 'nrs-status'] |
nobody |
22-26816 22 days ago |
22-26618 22 days ago |
0-4260 1 hour |
| 40539 |
edwardfalk author:edwardfalk |
feat(NumberTheory/LSeries): trivial and nontrivial zeros of riemannZeta |
This PR adds the sets of trivial and nontrivial zeros of the Riemann zeta function to
`Mathlib/NumberTheory/LSeries/ZetaZeros.lean`:
- `riemannZetaTrivialZeros` : the set `{-2, -4, -6, …}`, with a membership lemma and
the inclusion into `riemannZetaZeros` (via `riemannZeta_neg_two_mul_nat_add_one`);
- `riemannZetaNontrivialZeros` : zeros that are neither trivial nor the point `s = 1`,
with a membership lemma and the inclusion into `riemannZetaZeros`;
- `riemannHypothesis_iff_nontrivialZeros` : `RiemannHypothesis` is equivalent to the
statement that every nontrivial zero has real part `1/2`.
Motivation: the set-based formulation is the natural interface for follow-up work on
the Riemann xi function (follow-up PR adds `riemannXi` with the unconditional zero
characterization `riemannXi s = 0 ↔ s ∈ riemannZetaNontrivialZeros`) and, further out,
for Li's criterion, whose coefficient sums range over the nontrivial zero set.
Disclosure: this code was written with substantial assistance from Claude (Anthropic),
as part of a long-running formalization project; I have reviewed it, it is sorry-free,
and it builds and lints clean at master. Please apply the `LLM-generated` label.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
|
t-number-theory
new-contributor
LLM-generated
awaiting-author
|
51/0 |
Mathlib/NumberTheory/LSeries/ZetaZeros.lean |
1 |
4 |
['felixpernegger', 'github-actions', 'loefflerd'] |
loefflerd assignee:loefflerd |
22-6639 22 days ago |
22-6639 22 days ago |
8-26005 8 days |
| 40860 |
ReemMelamed author:ReemMelamed |
feat(Algebra/Group/GreensRelations): add equivalence classes and posets for Green's relations |
This PR defines equivalence classes, quotient types, and induced posets for Green's relations on semigroups.
It also introduces regular elements and regular D-classes.
This is the second PR in a series formalizing Green's relations.
[Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Formalization.20of.20Green.27s.20Relations.20for.20semigroups/with/598557876)
---
- [ ] depends on: #40050 |
t-algebra
blocked-by-other-PR
new-contributor
label:t-algebra$ |
670/0 |
Mathlib.lean,Mathlib/Algebra/Divisibility/Basic.lean,Mathlib/Algebra/Group/GreensRelations/Basic.lean,Mathlib/Algebra/Group/GreensRelations/Classes.lean,Mathlib/Algebra/Group/GreensRelations/Defs.lean |
5 |
3 |
['github-actions', 'mathlib-dependent-issues'] |
nobody |
21-27473 21 days ago |
21-29842 21 days ago |
0-677 11 minutes |
| 40464 |
roos-j author:roos-j |
feat(Analysis/Complex): add `conj_exp_ofReal_mul_I` |
---
This is maybe natural enough to not need justification, but is also useful in https://github.com/roos-j/lean-oscillatory
|
t-analysis
new-contributor
WIP
|
3/0 |
Mathlib/Analysis/Complex/Trigonometric.lean |
1 |
4 |
['github-actions', 'roos-j', 'themathqueen'] |
nobody |
21-23591 21 days ago |
22-74040 22 days ago |
3-52083 3 days |
| 40707 |
fraware author:fraware |
CategoryTheory: add naturality and whiskering reference examples |
## Summary
- Add a naturality square example in `NatTrans.lean` closing via `rw [← NatTrans.naturality]`.
- Add whiskering component and naturality square examples in `Whiskering.lean` (`whiskerRight_app`, `whiskerLeft_app`, and `rw [← NatTrans.naturality]`).
- Add functoriality reference examples in `Functor/Basic.lean` (`map_id`, `map_comp`, composed-functor `map_id`).
- Add a Yoneda composite-map usage example in `Yoneda.lean`.
These are reference examples from a category-theory proof friction survey; no new lemmas or imports.
## Test plan
- [x] `lake build Mathlib.CategoryTheory.Functor.Basic`
- [x] `lake build Mathlib.CategoryTheory.NatTrans`
- [x] `lake build Mathlib.CategoryTheory.Whiskering`
- [x] `lake build Mathlib.CategoryTheory.Yoneda`
- [ ] No new `import` lines; examples use lemmas already in scope |
t-category-theory
new-contributor
awaiting-author
will-close-soon
|
36/0 |
Mathlib/CategoryTheory/Functor/Basic.lean,Mathlib/CategoryTheory/NatTrans.lean,Mathlib/CategoryTheory/Whiskering.lean,Mathlib/CategoryTheory/Yoneda.lean |
4 |
4 |
['github-actions', 'joelriou'] |
nobody |
20-46906 20 days ago |
25-25377 25 days ago |
0-23 23 seconds |
| 40711 |
fraware author:fraware |
doc(CategoryTheory/Limits): add reference examples for binary products and coproducts |
## Summary
Examples-only PR: four `noncomputable example` blocks in a new `section ReferenceExamples` of `BinaryProducts.lean`. No API, automation, or attribute changes.
The lemmas used (`limit.isLimit`, `colimit.isColimit`, `uniqueUpToIso`) are already in Mathlib; these examples document the canonical universal-property pattern for binary (co)product diagrams.
## Examples added
1. Canonical product cone is a limit: `IsLimit (limit.cone (pair X Y))` via `limit.isLimit (pair X Y)`
2. Uniqueness up to iso for limits: `c ≅ limit.cone (pair X Y)` via `hc.uniqueUpToIso (limit.isLimit (pair X Y))`
3. Canonical coproduct cocone is a colimit: `IsColimit (colimit.cocone (pair X Y))` via `colimit.isColimit (pair X Y)`
4. Uniqueness up to iso for colimits: `c ≅ colimit.cocone (pair X Y)` via `hc.uniqueUpToIso (colimit.isColimit (pair X Y))`
## Test plan
- [ ] `lake build Mathlib.CategoryTheory.Limits.Shapes.BinaryProducts`
- [ ] CI green
## Notes
Branch is based on tag `v4.31.0`. Targeting `master` (currently ahead of v4.31.0); the example API matches the current `limit.isLimit` / `colimit.isColimit` / `uniqueUpToIso` names on that release. |
t-category-theory
new-contributor
awaiting-author
will-close-soon
|
26/0 |
Mathlib/CategoryTheory/Limits/Shapes/BinaryProducts.lean |
1 |
3 |
['github-actions'] |
nobody |
20-46887 20 days ago |
25-16905 25 days ago |
0-5917 1 hour |
| 40812 |
karlesmarin author:karlesmarin |
feat(RingTheory/HopfAlgebra): the antipode is the unique convolution … |
…inverse of the identity
Add `HopfAlgebra.eq_antipode_of_convMul_id` and `HopfAlgebra.eq_antipode_of_id_convMul`: any R-linear map that is a one-sided convolution inverse of the identity equals the antipode. The proof is `left_inv_eq_right_inv` in the convolution monoid `WithConv (A →ₗ[R] A)`, using the two antipode axioms. This resolves the "uniqueness of Hopf algebra structure on a bialgebra" TODO and is the companion (uniqueness) to the existing `ofConvInverse` constructor (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 — uniqueness of the antipode — is classical; the contribution is its Lean formalization.
---
<!-- Your PR title will become the first line of the commit message.
In this box, the text above the `---` (if not empty) will be appended
to the commit message, and can be used to give additional context or
details. Please leave a blank newline before the `---`, otherwise GitHub
will format the text above it as a title.
For details on the "pull request lifecycle" in mathlib, please see:
https://leanprover-community.github.io/contribute/index.html
In particular, note that most reviewers will only notice your PR
if it passes the continuous integration checks.
Please ask for help on https://leanprover.zulipchat.com if needed.
When merging, all the commits will be squashed into a single commit
listing all co-authors.
Co-authors in the squash commit are gathered from two sources:
First, all authors of commits to this PR branch are included. Thus,
one way to add co-authors is to include at least one commit authored by
each co-author among the commits in the pull request. If necessary, you
may create empty commits to indicate co-authorship, using commands like so:
git commit --author="Author Name <author@email.com>" --allow-empty -m "add Author Name as coauthor"
Second, co-authors can also be listed in lines at the very bottom of
the commit message (that is, directly before the `---`) using the following format:
Co-authored-by: Author Name <author@email.com>
If you are moving or deleting declarations, please include these lines
at the bottom of the commit message (before the `---`, and also before
any "Co-authored-by" lines) using the following format:
Moves:
- Vector.* -> List.Vector.*
- ...
Deletions:
- Nat.bit1_add_bit1
- ...
Any other comments you want to keep out of the PR commit should go
below the `---`, and placed outside this HTML comment, or else they
will be invisible to reviewers.
If this PR depends on other PRs, please list them below this comment,
using the following format:
- [ ] depends on: #abc [optional extra text]
- [ ] depends on: #xyz [optional extra text]
-->
[](https://gitpod.io/from-referrer/)
|
t-ring-theory
new-contributor
LLM-generated
|
21/3 |
Mathlib/RingTheory/HopfAlgebra/Basic.lean |
1 |
5 |
['github-actions', 'karlesmarin', 'themathqueen'] |
nobody |
20-17934 20 days ago |
23-15292 23 days ago |
23-14942 23 days |
| 40280 |
mrdouglasny author:mrdouglasny |
feat(Analysis/Calculus/ParametricIntegral): one-sided differentiation under the integral |
Adds `hasDerivWithinAt_Ici_integral_of_dominated_loc_of_deriv_le`, the within-`Ici x₀` (right) analogue of `hasDerivAt_integral_of_dominated_loc_of_deriv_le`: differentiation under the integral sign where the derivative bound is required only on a **right**-neighborhood `s ∈ 𝓝[≥] x₀`, concluding `HasDerivWithinAt (fun x ↦ ∫ a, F x a ∂μ) (∫ a, F' x₀ a ∂μ) (Ici x₀) x₀`.
### Motivation
The existing two-sided theorem needs the domination on a full neighborhood of `x₀`. That fails for parametric integrals dominated only on one side — e.g. Gibbs / partition-function families `g ↦ ∫ A e ^ (-g • V)` where `V` is bounded below but not above, so the weight is integrable only for `g ≥ 0` (the Dyson-instability situation in constructive QFT). One still wants the one-sided derivative at the boundary.
### Proof
Rather than re-running the dominated-convergence argument, `F` is extended across `x₀` by its affine first-order part below `x₀`,
`G x a = if x₀ ≤ x then F x a else F x₀ a + (x - x₀) • F' x₀ a`,
which is two-sided dominated (the affine part has constant derivative `F' x₀ a`, bounded by `bound a`). The existing two-sided theorem applies to `G`, and since `G = F` on `Ici x₀`, the conclusion restricts to the desired `HasDerivWithinAt`.
I'm happy to adjust naming, or to generalize to an arbitrary set `t` (`𝓝[t] x₀`) if reviewers prefer — that would need the direct dominated-convergence proof rather than the extension trick.
|
t-analysis
new-contributor
awaiting-author
|
105/0 |
Mathlib/Analysis/Calculus/ParametricIntegral.lean |
1 |
3 |
['ADedecker', 'github-actions'] |
ADedecker assignee:ADedecker |
20-9652 20 days ago |
20-9652 20 days ago |
16-54932 16 days |
| 38476 |
agusakov author:agusakov |
refactor(Combinatorics/Digraph): add vertex sets |
---
Adopting #33466
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|
t-combinatorics
new-contributor
awaiting-author
|
381/50 |
Mathlib/Combinatorics/Digraph/Basic.lean,Mathlib/Combinatorics/Digraph/Orientation.lean |
2 |
20 |
['Shreyas4991', 'YaelDillies', 'agusakov', 'github-actions'] |
nobody |
20-2787 20 days ago |
74-41491 74 days ago |
3-33232 3 days |
| 33985 |
YellPika author:YellPika |
feat(Order/OmegaCompletePartialOrder): `OmegaCompletePartialOrder` instance for `Sum` with basic `ωScottContinuous` lemmas |
This PR adds an `OmegaCompletePartialOrder` instance for `Sum`, along with `ωScottContinuous` lemmas for basic operations (`inl`, `inr`, `elim`). Appropriate lemmas are marked with `@[fun_prop]` so that the `fun_prop` tactic can automatically deduce `ωScottContinuous` proofs for functions involving `Sum`s (e.g. see the proof of `Sum.ωScottContinuous_map`).
---
- [x] depends on: #33941
- [x] depends on: #37258
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|
new-contributor
large-import
t-order
awaiting-author
merge-conflict
|
205/3 |
Mathlib/Data/Sum/Basic.lean,Mathlib/Data/Sum/Order.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,Mathlib/Order/ScottContinuity.lean,Mathlib/Topology/Constructions/SumProd.lean |
5 |
59 |
['Komyyy', 'Vierkantor', 'YaelDillies', 'YellPika', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] |
YaelDillies and pechersky assignee:pechersky assignee:YaelDillies |
19-70277 19 days ago |
100-13626 100 days ago |
52-59724 52 days |
| 29744 |
espottesmith author:espottesmith |
feat(Combinatorics): define directed hypergraphs |
This PR defines directed hypergraphs:
```
@[ext]
structure DiHypergraph (α : Type*) where
/-- The vertex set -/
vertexSet : Set α
/-- The edge set -/
edgeSet : Set ((Set α) × (Set α))
/-- Each edge is a pair (s, d), where s ⊆ vertexSet and d ⊆ vertexSet -/
edge_src_dst_isSubset_vertexSet' : ∀ ⦃e⦄, e ∈ edgeSet → e.1 ⊆ vertexSet ∧ e.2 ⊆ vertexSet
```
Additional definitions:
- tail/head stars and negative/positive stars
- some special cases (B-Graph, F-Graph, BF-Graph, and what I'm calling a "non-endless" dihypergraph, where neither the source/tail nor the destination/head are empty)
- Vertex and (hyper)edge adjacency
- isolated vertices
- empty and nonempty dihypergraphs
The design employed here is based off of #28613, but this PR does not depend on that one.
---
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|
t-combinatorics
new-contributor
|
290/0 |
Mathlib.lean,Mathlib/Combinatorics/DiHypergraph/Basic.lean |
2 |
5 |
['b-mehta', 'espottesmith', 'github-actions', 'mathlib4-merge-conflict-bot'] |
nobody |
19-39318 19 days ago |
21-12132 21 days ago |
158-15530 158 days |
| 40963 |
Formalistic03 author:Formalistic03 |
feat(Combinatorics/SimpleGraph/Paths): add lemma about the first dart if dropLast is a path |
If `dropLast` of a walk is a path, a dart of the walk sharing its first vertex with the walk also shares its second vertex.
I thought this was a natural more general form of `IsPath.eq_snd_of_mem_edges`, useful for cycles for example.
---
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|
t-combinatorics
new-contributor
|
16/0 |
Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean |
2 |
2 |
['github-actions'] |
nobody |
19-2237 19 days ago |
19-3091 19 days ago |
19-3403 19 days |
| 40911 |
rshlyakh author:rshlyakh |
feat(RingTheory/Ideal): add Algebra.HasGoingUp |
This closely mirrors `Mathlib/RingTheory/Ideal/GoingDown.lean` by defining an analogous predicate `Algebra.HasGoingUp` and proving basic properties. It includes:
- `Algebra.HasGoingUp.iff_specializingMap_primeSpectrumComap`: going up is equivalent
to specializations lifting along `Spec S → Spec R`.
- `Algebra.HasGoingUp.of_isIntegral`: integral algebras satisfy going up.
- `Ideal.exists_ltSeries_of_hasGoingUp`: a generalization of `exists_ideal_over_prime_of_isIntegral_of_isPrime` from `Mathlib/RingTheory/Ideal/GoingUp.lean` to chains of arbitrary length. This was previously an explicitly marked `TODO`.
---
I am unsure if this contribution should be in a separate file. Initially, I wanted to add it to the existing `Mathlib/RingTheory/Ideal/GoingUp.lean` file, but my theorem `Algebra.HasGoingUp.iff_specializingMap_primeSpectrumComap` requires the import `Mathlib.RingTheory.Spectrum.Prime.Topology`, which itself imports `Mathlib.RingTheory.Ideal.GoingUp.lean`. Advice on this would be appreciated.
LLM use: Codex was used to identify useful existing theorems in Mathlib and to check for typos/formatting issues. The theorem statements, proofs, and docstrings are human-written.
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|
t-ring-theory
new-contributor
|
135/2 |
Mathlib.lean,Mathlib/RingTheory/Ideal/GoingUp.lean,Mathlib/RingTheory/Ideal/HasGoingUp.lean |
3 |
15 |
['github-actions', 'riccardobrasca', 'robertylewis', 'rshlyakh'] |
riccardobrasca assignee:riccardobrasca |
18-83977 18 days ago |
19-2796 19 days ago |
19-66344 19 days |
| 40900 |
judsonpereirademoura-netizen author:judsonpereirademoura-netizen |
feat(Analysis/Matrix): spectral theorem for normal matrices |
Adds the **spectral theorem for normal matrices** over `ℂ`: every normal matrix
(`IsStarNormal M`, i.e. `Mᴴ * M = M * Mᴴ`) is unitarily diagonalizable,
`M = U * diagonal μ * Uᴴ`. This extends `Matrix.IsHermitian.spectral_theorem`
(Hermitian case) to the normal case.
Specific to `ℂ` (algebraically closed): a real normal matrix — e.g. a planar rotation
`![![0,-1],![1,0]]` — is normal but not orthogonally diagonalizable over `ℝ`, hence the
hypothesis `Matrix n n ℂ` rather than `RCLike`.
### API (mirrors `Matrix.IsHermitian.*`)
- `normalEigenvectorBasis`, `normalEigenvalues`, `normalEigenvectorUnitary`
- `mulVec_normalEigenvectorBasis` (eigen equation); `normalEigenvectorUnitary_apply`/`_mulVec`
- `spectral_theorem_of_isStarNormal` (`M = U * diagonal μ * Uᴴ`)
- `exists_isUnitary_conj_diagonal_of_isStarNormal` (existential), `isStarNormal_of_isUnitary_conj_diagonal`
(converse), `isStarNormal_iff_exists_isUnitary_conj_diagonal` (iff)
### Proof
Cartesian decomposition `M = A + i•B` with `A = selfAdjointPart ℝ M` and
`B = -i • skewAdjointPart ℝ M`, both Hermitian. Normality of `M` is exactly `Commute A B`,
so `A`, `B` are commuting symmetric operators; the space splits as an internal direct sum of
their joint eigenspaces (`LinearMap.IsSymmetric.directSum_isInternal_of_commute`). A subordinate
orthonormal basis diagonalizes both, hence `M`.
---
*Notes for reviewers:* developed with AI assistance (Claude); the mathematics and proofs were
checked by the author. Locally validated against `v4.30.0-rc2`: `lake build` clean (0 warnings,
all style linters), `lake exe runLinter` passed, `#print axioms` = `[propext, Classical.choice,
Quot.sound]`. Opened as **draft** pending CI build against `master`. Naming/visibility happy to
adjust per review.
|
new-contributor
t-analysis
awaiting-author
LLM-generated
|
315/0 |
Mathlib.lean,Mathlib/Analysis/Matrix/NormalSpectrum.lean |
2 |
9 |
['github-actions', 'judsonpereirademoura-netizen', 'themathqueen', 'wwylele'] |
nobody |
18-69151 18 days ago |
unknown |
0-0 0 seconds |
| 38871 |
0xTerencePrime author:0xTerencePrime |
feat(Combinatorics/SimpleGraph): add parity lemmas for outer and inner vertices |
Adds three lemmas to `SimpleGraph.DegreeSum`:
- `sum_degrees_option_zmod_two`: the handshaking lemma for `Option I` over ZMod 2
- `degree_none_zmod_two_eq_sum`: simp-normal form of the above
- `card_degree_one_option_eq_outer_zmod_two`: under degree bound ≤ 2, count of degree-1 inner vertices equals outer vertex degree mod 2 |
t-combinatorics
new-contributor
|
65/3 |
Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean |
1 |
6 |
['0xTerencePrime', 'SnirBroshi', 'github-actions'] |
b-mehta assignee:b-mehta |
18-63991 18 days ago |
70-20777 70 days ago |
70-20427 70 days |
| 39687 |
TentativeConvert author:TentativeConvert |
feat(Algebra/Group/Submonoid): type class to indicate that supremum in a SubmonoidClass agrees with supremum of submonoids |
Add a type class `SubmonoidClass.IsConcreteSSup` to indicate that the canonical map `.ofClass` from a class `S` of submonoids of `M` to `Submonoid M` preserves suprema.
---
This PR implements the minimal type class assumption needed to make „pushfoward of gradings along maps of indexing sets“ – see draft PR #39356 – work in some `SetLike` generality.
Given `{S M : Type*} [SetLike S M] [Monoid M] [SubmonoidClass S M]`, we have canonical maps
```
S → Submonoid M → Set M
```
The first is `Submonoid.ofClass`, the second and the composition are `coe` maps coming from the `SetLike` structures. Depending on `S`, these maps may or may not satisfy various properties with respect the lattice structures on `Submonoid M` and `Set M`. Mathlib so far includes the type class `[IsConcreteLE S M]`, which asserts that the composition `S → Set M` is order-preserving and order-reflecting. The type class defined here asserts that the first map, `S → Submonoid M`, preserves suprema.
In examples such as `S = Subgroup M`, `S = Submodule R M`, much more is true – in these cases, `S` is a complete sublattice of `Submonoid M`. But there are also examples where only the weaker property defined here holds, e.g. `S = OpenSubgroup M` for a topological group `M`.
Note on `outParam`: I did *not* write `(M : outParam Type*)` in the assumptions of `SubmonoidClass.IsConcreteSSup` in accordance with the [DocString of `Setlike`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/SetLike/Basic.html#SetLike). However, we do have `(B : outParam Type*)` in the definition of `IsConcreteLE`, so perhaps I'm misinterpreting the DocString.
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|
new-contributor
t-algebra
label:t-algebra$ |
56/0 |
Mathlib.lean,Mathlib/Algebra/Group/Submonoid/SSup.lean |
2 |
2 |
['github-actions'] |
ocfnash assignee:ocfnash |
18-63988 18 days ago |
51-31553 51 days ago |
51-31803 51 days |
| 40576 |
zhangmai19 author:zhangmai19 |
feat(Analysis/Convex): add Shapley-Folkman lemma |
The Shapley-Folkman lemma is a convex analysis result well-known in economics but rarely stated in math. Roughly: a sum of non-convex sets is "almost convex" — any point in the convex hull of the sum can be written as a sum of points from the individual convex hulls, and at most d of them actually need the convex hull (the rest are already in the original sets).
Closes #14427 |
t-analysis
new-contributor
awaiting-author
|
1022/0 |
Mathlib.lean,Mathlib/Analysis/Convex/ShapleyFolkman.lean,docs/references.bib |
3 |
12 |
['felixpernegger', 'github-actions', 'grunweg', 'zhangmai19'] |
YaelDillies assignee:YaelDillies |
18-46575 18 days ago |
28-43576 28 days ago |
0-424 7 minutes |
| 40652 |
michaellee94 author:michaellee94 |
feat(Geometry/Manifold): the Möbius band is a non-orientable manifold |
Constructs the Möbius band as the total space of a line bundle over the circle (`moebiusBundleCore`, `MoebiusBand`), proves it is a connected smooth manifold (`MoebiusBand.isManifold`, `MoebiusBand.connectedSpace`), and proves it is non-orientable (`MoebiusBand.not_orientable`).
AI assistance note: After formalizing definitions and theorem statements, I used Claude (hooked up to the Lean LSP MCP running locally) to help iteratively fix elaboration errors (e.g. by calling Loogle to locate the necessary intermediate results and inject them where needed).
- [ ] depends on: #35376 |
t-differential-geometry
new-contributor
blocked-by-other-PR
LLM-generated
|
1491/0 |
Mathlib.lean,Mathlib/Analysis/Complex/Circle.lean,Mathlib/Geometry/Manifold/Instances/MoebiusBand.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Geometry/Manifold/Orientation.lean |
5 |
3 |
['github-actions', 'mathlib-dependent-issues'] |
nobody |
18-10023 18 days ago |
26-56780 26 days ago |
0-313 5 minutes |
| 40200 |
AlecsFerra author:AlecsFerra |
feat(FinitelyPresentedGroup): add definitional equivalence with generating set given by S : Set G |
cc @homeowmorphism
- [x] depends on: #40726
---
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|
new-contributor
t-group-theory
large-import
awaiting-author
|
26/6 |
Mathlib/GroupTheory/FinitelyPresentedGroup.lean |
1 |
12 |
['AlecsFerra', 'github-actions', 'javgomzar', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'tb65536'] |
tb65536 assignee:tb65536 |
18-7168 18 days ago |
31-23554 31 days ago |
7-56895 7 days |
| 31092 |
FlAmmmmING author:FlAmmmmING |
feat(Algebra/Group/ForwardDiff.lean): Add theorem `sum_shift_eq_fwdDiff_iter`. |
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|
t-algebra
new-contributor
label:t-algebra$ |
17/1 |
Mathlib/Algebra/Group/ForwardDiff.lean |
1 |
24 |
['BeibeiX0', 'FlAmmmmING', 'Ruben-VandeVelde', 'dagurtomas', 'github-actions', 'jcommelin', 'mathlib-bors', 'mathlib4-merge-conflict-bot'] |
ocfnash assignee:ocfnash |
17-63994 17 days ago |
18-48579 18 days ago |
72-70284 72 days |
| 37964 |
mortarsanjaya author:mortarsanjaya |
feat(Algebra/Order/Floor): weaken assumptions on theorems about `FloorRing` |
This PR weakens as much assumptions as possible on theorems about `FloorSemiring` and `FloorRing`. Mainly, `IsOrderedRing` and `IsStrictOrderedRing` are weakened to just `IsOrderedAddMonoid` or removed completely from the assumptions on the theorems.
Most theorems can be generalized as is or only requires a minor modification of replacing lemmas about casting naturals/integers preserving order (the likes of `Nat.cast_le`, `Int.cast_lt`, etc.) with the corresponding version for `FloorRing`. Some other lemmas require modification in the proofs, but these changes shorten the proofs. The new proof of the theorem `Int.mul_cast_floor_div_cancel_of_pos` requires an extra import.
The assumption `IsOrderedAddMonoid` is required on lemmas that involve comparison + addition, and `IsOrderedRing` is required only on lemmas that involve comparison + multiplication of two non-integer elements.
---
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|
t-algebra
new-contributor
label:t-algebra$ |
254/258 |
Mathlib/Algebra/Order/Floor/Defs.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semiring.lean,Mathlib/Algebra/Order/Round.lean,Mathlib/Data/Int/Log.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Topology/Algebra/Order/Floor.lean |
7 |
7 |
['github-actions', 'leanprover-radar', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mortarsanjaya'] |
ocfnash assignee:ocfnash |
17-63983 17 days ago |
39-11324 39 days ago |
39-14828 39 days |
| 39366 |
akiezun author:akiezun |
feat(Data/Nat): add prime divisibility for ascFactorial and choose |
Adds two prime-divisibility lemmas for natural-number factorial/binomial APIs.
The first characterizes when a prime divides an ascending factorial:
`Nat.Prime.dvd_ascFactorial_iff`.
The second applies this to binomial coefficients:
`Nat.Prime.dvd_choose_add_sub_one_iff`, using
`Nat.ascFactorial_eq_factorial_mul_choose'` and cancellation of the `n!` factor
when `n < p`.
---
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|
t-data
new-contributor
large-import
|
46/0 |
Mathlib.lean,Mathlib/Data/Nat/Choose/Consecutive.lean,Mathlib/Data/Nat/Factorial/BigOperators.lean |
3 |
9 |
['SnirBroshi', 'akiezun', 'github-actions', 'wwylele'] |
eric-wieser assignee:eric-wieser |
17-63963 17 days ago |
55-1871 55 days ago |
59-11900 59 days |
| 39369 |
pd4st8hb95-hub author:pd4st8hb95-hub |
feat: add basic fuzzy set definitions |
This PR adds a minimal `FuzzySet` API in `Mathlib/Order/FuzzySet`.
A fuzzy set is represented as an abbreviation:
`FuzzySet α L := α → L`
The file provides basic definitions and lemmas:
- `degree`
- `support`
- `core`
- `weakCut`
- `strongCut`
- membership simp lemmas
- extensionality
- basic monotonicity lemmas for weak and strong cuts
This PR intentionally does not add complement, union/intersection-specific API, normal or convex fuzzy sets, fuzzy relations, or advanced fuzzy set theory.
Validation:
- `lake build Mathlib.Order.FuzzySet`
- `#lint only docBlame docBlameThm`
Feedback on whether `Mathlib/Order/FuzzySet.lean` is the right location for this minimal API would be appreciated.
---
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|
t-order
new-contributor
|
169/0 |
Mathlib.lean,Mathlib/Order/FuzzySet.lean |
2 |
6 |
['github-actions', 'grunweg', 'pd4st8hb95-hub', 'wwylele'] |
bryangingechen assignee:bryangingechen |
17-63962 17 days ago |
57-16823 57 days ago |
57-16833 57 days |
| 39495 |
hawkrobe author:hawkrobe |
feat(Data/Multiset/Antidiagonal): `antidiagonal_add` and `map_swap_antidiagonal` |
Adds `map_swap_antidiagonal` and `antidiagonal_add`.
---
Fills out the API parallel to `Multiset.Nat.map_swap_antidiagonal` and `Finset.map_swap_antidiagonal`. (And adds `@[congr]` to `bind_congr`.)
Used for shuffle-coproduct constructions.
(#7486, I found this old [Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/antidiagonals.20having.20multiplicity.20.237595/near/238573473))
I used Claude Code to audit and polish. |
t-data
new-contributor
LLM-generated
|
19/0 |
Mathlib/Data/Multiset/Antidiagonal.lean,Mathlib/Data/Multiset/Bind.lean |
2 |
8 |
['github-actions', 'hawkrobe', 'j-loreaux', 'mathlib-bors'] |
eric-wieser assignee:eric-wieser |
17-63959 17 days ago |
18-3012 18 days ago |
55-83326 55 days |
| 39505 |
dannyhe652 author:dannyhe652 |
feat(SimpleGraph): add Vizing's theorem for edge coloring |
Hi! I'm a high school student interested in formulization of mathematics in Lean. Recently, I have worked on a project to formulize Vizing Theorem with Daniel Raggi from Cambridge University with AI assistance. In particular, we first drafted an outline for the proof, and built the proof using Claude Opus 4.5 and 4.6. The proof is optimized using Aristotle and finally reviewed by ourselves. We rewrote some parts of the code and some comments. The code now builds cleanly and we wish this code to be reviewed by Lean Community. I am aware that there are previous attempts, some being successful, on formulizing Vizing Theorem, including this one by Arohee https://github.com/aroheebhoja/vizing. However, I believe that no PR have been made. Our proof is not based on his proof, but it could be helpful for the community to review that project as well. I sincerely thank everyone who has time to verify and review our code. A summary of the project is as follows. Please contact me if there are any questions or problems.
## Summary
This PR completes the proof of **Vizing's theorem** for edge coloring in simple graphs, proving that the chromatic index of any graph is either Δ (the maximum degree) or Δ + 1.
## Changes
### New files
- **`Mathlib/Combinatorics/SimpleGraph/Coloring/EdgeColoring.lean`** — Core definitions
- `edgeColoring`: Type for line graph colorings
- `edgeColorable`: Graph is edge-colorable with n colors
- `chromaticIndex`: Chromatic index as ℕ
- **`Mathlib/Combinatorics/SimpleGraph/Coloring/KempeChain.lean`** — Kempe Chain
- Coloring observables: `incidentEdges`, `incidentColors`, `missingColors`
- Kempe subgraph structure with bounded degree
- `swapKempe`: Recolor edges in a connected component via color-swapping
- **`Mathlib/Combinatorics/SimpleGraph/Coloring/VizingFan.lean`** — Vizing Fan Rotation
- `IsFan`: Vizing fan structure with special color properties
- Fan maximality and dichotomy on terminal vertices
- `rotate_termA`: Extend coloring when a free color exists at both endpoints
- `vizingAdjacencyLemma`: Main adjacency lemma for both cases
- **`Mathlib/Combinatorics/SimpleGraph/Coloring/VizingTheorem.lean`** — Main theorems
- `edge_eq_of_color_eq`: Proper edge colorings assign different colors to distinct edges sharing a vertex
- `maxDegree_le_chromaticIndex`: χ'(G) ≥ Δ(G)
- `chromaticIndex_bot`: Empty graph has chromatic index 0
- `vizingUpperBound_aux`: Inductive proof of upper bound on number of edge
- `vizingTheorem`: χ'(G) ∈ {Δ(G), Δ(G) + 1}
### Modified files
- `Mathlib.lean` — Added imports for the four new coloring modules
## Technical Approach
**Lower bound** (χ'(G) ≥ Δ):
- Edges incident to a max-degree vertex form a clique in the line graph
- Clique number lower-bounds chromatic number
**Upper bound** (χ'(G) ≤ Δ + 1):
- Induction on the number of edges
- Base case: empty graph colored with 0 colors
- Inductive step:
- If a free color exists at both endpoints of an edge, then extend directly
- Otherwise:
- Build a maximal fan from one endpoint
- Apply dichotomy: either extend via Term-A (free color at both endpoints) or Term-B (Kempe swap)
- Term-B uses a three-vertex connectivity argument to derive a contradiction, forcing the fan to extend
## Key Lemmas
- `incidentEdges`, `incidentColors`, `missingColors`: Coloring observables at vertices
- `kempeSubgraph`: Restricted subgraph of edges with two specific colors
- `swapKempe`: Recolor via Kempe chain swapping
- `IsFan.singleton`: Trivial fan always valid
- `IsFan.length_le_card`: Fan length is bounded by vertex count
- `IsFan.dichotomy`: Maximal fan satisfies Term-A or Term-B
- `IsFan.rotate_termA`: Term-A case extends the coloring inductively
- `vizingAdjacencyLemma`: Handles both cases for extending one edge
- `vizingUpperBound_aux`: Framework for full inductive proof
- `edge_eq_of_color_eq`: Distinctness of edges with same color
## Testing
All four modules compile with no `sorry` nor errors or warnings.
## References
* V. G. Vizing, *On an estimate of the chromatic class of a p-graph*,
Diskret. Analiz. 3 (1964), 25–30.
## Co-authors
Co-authored-by: Daniel Raggi <dr495@cam.ac.uk>
Co-authored-by: Aristotle (Harmonic) <aristotle-harmonic@harmonic.fun>
Co-authored-by: Claude Opus 4.5 & 4.6 <noreply@anthropic.com>
---
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|
t-combinatorics
new-contributor
LLM-generated
|
1913/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/EdgeColoring.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/KempeChain.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/VizingFan.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/VizingTheorem.lean |
5 |
4 |
['github-actions', 'mathlib-merge-conflicts'] |
b-mehta assignee:b-mehta |
17-63958 17 days ago |
23-38350 23 days ago |
44-13853 44 days |
| 39567 |
AlexBrodbelt author:AlexBrodbelt |
feat(Mathlib/Data/Finite/Option): option type is finite iff type is finite |
Option type is finite if and only if the type is finite.
This is an intermediate result to proving that if the `GroupWithZero` is (in)finite then the `Units` are (in)finite.
---
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|
t-data
new-contributor
|
25/0 |
Mathlib.lean,Mathlib/Data/Finite/Option.lean |
2 |
14 |
['AlexBrodbelt', 'github-actions', 'plp127', 'themathqueen'] |
TwoFX assignee:TwoFX |
17-63955 17 days ago |
54-30416 54 days ago |
54-30680 54 days |
| 39048 |
AydenLamp author:AydenLamp |
feat(Algebra/Group/Defs): add positive natural exponentiation for semigroups |
Introduce exponentiation for semigroups with positive natural exponents. This serves as a foundation for future results on Green’s relations and Rees matrix constructions in semigroups.
---
Co-authored-by: Howard Straubing <howard.straubing@bc.edu>
Soleil Repple <repple@bc.edu>
Nathan Hart-Hodgson <harthodg@bc.edu>
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|
new-contributor
t-algebra
awaiting-author
label:t-algebra$ |
109/0 |
Mathlib.lean,Mathlib/Algebra/Group/SemigroupPow.lean |
2 |
7 |
['ScottCarnahan', 'github-actions', 'wwylele'] |
nobody |
17-61806 17 days ago |
65-77577 65 days ago |
0-115 1 minute |
| 36719 |
NoneMore author:NoneMore |
feat(ModelTheory): add `PartialType` for first-order theories |
This PR adds the definitions of partial types over theories and over parameter sets, and proves several equivalent characterizations.
---
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- [ ] depends on: #xyz [optional extra text]
-->
- [x] depends on: #36667
[](https://gitpod.io/from-referrer/)
|
t-logic
new-contributor
|
432/18 |
Mathlib.lean,Mathlib/ModelTheory/PartialTypes.lean,Mathlib/ModelTheory/Semantics.lean |
3 |
6 |
['NoneMore', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] |
nobody |
17-20375 17 days ago |
17-18730 17 days ago |
7-69361 7 days |
| 41052 |
hawkrobe author:hawkrobe |
refactor(RingTheory/HopfAlgebra): relocate `ofSurjective` |
---
Cleanup after #39790, moves `HopfAlgebra.ofSurjective` to `HopfAlgebra/Convolution.lean` and extracts the convolution functoriality.
[](https://gitpod.io/from-referrer/)
|
t-ring-theory
new-contributor
|
75/51 |
Mathlib/RingTheory/Bialgebra/Convolution.lean,Mathlib/RingTheory/Coalgebra/Convolution.lean,Mathlib/RingTheory/HopfAlgebra/Convolution.lean,Mathlib/RingTheory/HopfAlgebra/Quotient.lean |
4 |
2 |
['github-actions'] |
nobody |
16-79518 16 days ago |
16-80035 16 days ago |
16-79685 16 days |
| 41053 |
hawkrobe author:hawkrobe |
refactor(RingTheory): migrate bialgebra/Hopf to RingCon.Quotient |
---
Cleanup after #39790 using the [new RingCon](https://github.com/leanprover-community/mathlib4/pull/40451) instead of Ideal.
- [ ] depends on: #41052
[](https://gitpod.io/from-referrer/)
|
t-ring-theory
new-contributor
blocked-by-other-PR
|
160/138 |
Mathlib/RingTheory/Bialgebra/Convolution.lean,Mathlib/RingTheory/Bialgebra/Quotient.lean,Mathlib/RingTheory/Coalgebra/Convolution.lean,Mathlib/RingTheory/HopfAlgebra/Convolution.lean,Mathlib/RingTheory/HopfAlgebra/Quotient.lean |
5 |
3 |
['github-actions', 'mathlib-dependent-issues'] |
nobody |
16-77626 16 days ago |
16-77627 16 days ago |
0-1332 22 minutes |
| 38584 |
TJHeeringa author:TJHeeringa |
feat(Analysis/InnerProductSpace/Reproducing): Add outerKernel, mem_iff |
---
- [ ] depends on: #40362
- [ ] depends on: #40151
Adds the `outerKernel` definition and the theorem `mem_iff`. These are needed for proving statements involving embeddings of RKHS.
I can split `mem_of_posSemidef` and `mem_iff` off into a different pull request if that is preferred.
The theorems `mem_of_posSemidef` and `posSemidef_of_mem` are the two directions of `mem_iff`. `posSemidef_of_mem` is slightly stronger than the converse direction of `mem_iff` in the sense that it also specifies the constant `c` in the statement. The specified `c` is in fact the smallest possible `c` for which the statement holds.
The statement `mem_of_posSemidef` proves `∃ (g : H), (g : X → V) = f`. We could instead write `f ∈ (coeCLM 𝕜 (H:=H)).range`. Making this change would require the addition of the line `simp only [LinearMap.mem_range, coe_coe, coeCLM_apply]` in the beginning of the proof. The full beginning is then
```
lemma mem_of_posSemidef (f : X → V) {c : ℝ}
(hc : ((c : 𝕜) ^ 2 • kernel H - outerKernel 𝕜 f).PosSemidef) : f ∈ (coeCLM 𝕜 (H:=H)).range := by
simp only [LinearMap.mem_range, coe_coe, coeCLM_apply]
let Laux : ...
```
Making a `MemRKHS` like MemLp and MemSobolev and then writing `MemRKHS H f` is also an option. Happy to change it to whatever is preferred.
The proof of `mem_of_posSemidef` is based on the idea that any function f in the RKHS satisfies `<f,\sum_n K(\cdot,x_n)v_n>=\sum_{n} <f(x_n),v_n>` for `x_n\in X` and `v_n\in V` by the reproducing property. We define the operator L(\sum_n K(\cdot,x_n)v_n) = \sum_{n} <f(x_n),v_n>. This is bounded by the condition based on the kernels, and thus extends to a bounded linear operator on the RKHS. Its Riesz' representer agrees pointwise with f.
AI:
When asking how to avoid Classical.choose in constructing the operator L, Claude suggested the approach of going through the quotient. I made the proof using Claude as supplementary Loogle. Afterwards, I asked it to help shorted the proofs. Some suggestions for `mem_of_posSemidef` were applied. The other suggestions were not helping or not correct.
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t-analysis
new-contributor
awaiting-author
blocked-by-other-PR
|
143/3 |
Mathlib/Analysis/InnerProductSpace/Reproducing.lean |
1 |
25 |
['TJHeeringa', 'github-actions', 'j-loreaux', 'mathlib-dependent-issues', 'themathqueen'] |
j-loreaux assignee:j-loreaux |
16-76577 16 days ago |
18-80611 18 days ago |
31-31855 31 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 |
16-74769 16 days ago |
164-14889 164 days ago |
42-22427 42 days |
| 39868 |
JuanCoRo author:JuanCoRo |
feat(Algebra/Polynomial): linearity of `divByMonic` and adjacent results |
---
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This PR adds the `R`-linearity of the monic polynomial division map `_ /ₘ q`. It also adds adjacent results that stem from this work.
#### Refactors:
- Reuses the proofs from `add_modByMonic` and `smul_modByMonic` to generalize these results to `add_div_modByMonic` and `smul_div_modByMonic` respectively.
- Replaces the proofs of `add_modByMonic` and `smul_modByMonic` as specializations of the more general theorems `add_div_modByMonic` and `smul_div_modByMonic` respectively.
#### Additions:
- Adds the necessary results for `_ /ₘ q` linearity:
- `add_divByMonic : (p₁ + p₂) /ₘ q = p₁ /ₘ q + p₂ /ₘ q`
- `smul_divByMonic : c • p /ₘ q = c • (p /ₘ q)`
- Adds `_ /ₘ q` as an `R`-linear map:
- `divByMonicHom`: definition of `_ /ₘ q` as a linear map
- `mem_ker_divByMonic`: kernel characterization for `_ /ₘ q`.
- In `Div.lean` adds dual results for `/ₘ` that were already present for `%ₘ`
- `neg_divByMonic : (-p) /ₘ q = -(p /ₘ q)`
- `sub_divByMonic : (p₁ - p₂) /ₘ q = p₁ /ₘ q - p₂ /ₘ q`
- `mul_divByMonic_assoc (hd : q ∣ p₂) : (p₁ * p₂) /ₘ q = p₁ * (p₂ /ₘ q)`
While `mul_divByMonic_assoc` is not exactly the dual of `mul_modByMonic`, I thought it wouldn't hurt to add it.
[](https://gitpod.io/from-referrer/) |
new-contributor
t-algebra
label:t-algebra$ |
54/17 |
Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/RingDivision.lean |
2 |
8 |
['JuanCoRo', 'github-actions', 'wwylele'] |
ocfnash assignee:ocfnash |
16-63964 16 days ago |
44-26353 44 days ago |
44-26082 44 days |
| 40005 |
tautschnig author:tautschnig |
feat(Data/ZMod/Basic): isUnit characterisation in prime power moduli |
Add two lemmas characterising units in ZMod (p^n) via divisibility of the canonical lift:
isUnit_iff_not_prime_dvd_val: for prime p and n > 0,
IsUnit x ↔ ¬ p ∣ x.val.
not_isUnit_iff_prime_dvd_val: for prime p and n > 0,
¬ IsUnit x ↔ p ∣ x.val.
These specialise the existing isUnit_iff_coprime to prime power moduli, where the coprimality condition reduces to a simple divisibility check on the unique prime factor.
---
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|
t-data
new-contributor
|
15/0 |
Mathlib/Data/ZMod/Basic.lean |
1 |
3 |
['copilot-pull-request-reviewer', 'github-actions'] |
TwoFX assignee:TwoFX |
16-63960 16 days ago |
44-37958 44 days ago |
44-37608 44 days |
| 40006 |
tautschnig author:tautschnig |
feat(Data/ZMod/Basic): idempotents in ZMod (p^d) are exactly {0, 1} |
Add sq_eq_self_iff_eq_zero_or_one: in ZMod (p^d) for prime p and d > 0, x^2 = x iff x = 0 or x = 1.
This generalises eq_zero_or_one_of_sq_eq_self (which requires CancelMonoidWithZero, i.e., no zero divisors) to the prime-power case. ZMod (p^d) has zero divisors for d >= 2, so the mul_left_injective₀ argument used by the existing lemma does not apply. The proof works by lifting to ℕ, using that if gcd(a, b) = 1 and p^d | a*b then p^d divides one of a or b (by Euclid's lemma), then noting that a = x.val and b = x.val - 1 are consecutive naturals and hence coprime.
---
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|
t-data
new-contributor
|
56/0 |
Mathlib/Data/ZMod/Basic.lean |
1 |
3 |
['Julian-Kuelshammer', 'github-actions'] |
eric-wieser assignee:eric-wieser |
16-63959 16 days ago |
44-33107 44 days ago |
44-33452 44 days |
| 40155 |
TheGoedeDoel author:TheGoedeDoel |
feat: functor of localized commutative rings |
Given a functor of commutative rings R and a submonoid functor S,
we add a functor of commutative rings with objects that are localizations
of R(U) at the submonoid S(U). We also show that this functor satisfies a
universal property.
---
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|
t-algebra
new-contributor
label:t-algebra$ |
255/0 |
Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/LocalizedFunctor.lean |
2 |
14 |
['TheGoedeDoel', 'chrisflav', 'github-actions'] |
ocfnash assignee:ocfnash |
16-63953 16 days ago |
30-72017 30 days ago |
39-71711 39 days |
| 40967 |
Formalistic03 author:Formalistic03 |
feat(Combinatorics/SimpleGraph/Paths): some lemmas about inducing walks |
Could also be done via `SimpleGraph.Walk.map_induce`, but I thought that doing it directly is not much worse.
---
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|
new-contributor
t-combinatorics
|
48/0 |
Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Maps.lean,Mathlib/Data/List/Nodup.lean |
3 |
2 |
['github-actions'] |
nobody |
15-48263 15 days ago |
18-84489 18 days ago |
18-84224 18 days |
| 39820 |
samuelchassot author:samuelchassot |
feat(Combinatorics/SimpleGraph): an eulerian walk exists iff exactly 0 or 2 vertices have odd degree |
As per the TODO open in `Trails.lean`.
---
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|
t-combinatorics
new-contributor
awaiting-author
|
671/3 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Eulerian.lean,Mathlib/Combinatorics/SimpleGraph/Trails.lean |
3 |
9 |
['SnirBroshi', 'YaelDillies', 'copilot-pull-request-reviewer', 'github-actions'] |
YaelDillies assignee:YaelDillies |
15-24245 15 days ago |
47-21656 47 days ago |
0-86024 23 hours |
| 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
|
529/502 |
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 |
10 |
['AlexeyMilovanov', 'dagurtomas', 'github-actions', 'j-loreaux', 'mathlib-bors', 'mathlib-merge-conflicts'] |
nobody |
15-15036 15 days ago |
36-71028 36 days ago |
56-15772 56 days |
| 38897 |
0xTerencePrime author:0xTerencePrime |
feat(Combinatorics/SetFamily): formalize 1D Sperner's Lemma parity |
Formalizes the 1-dimensional Sperner's Lemma (parity version): given a coloring of
the `n + 1` vertices of a subdivided line segment with two colors (`ZMod 2`), if the
two endpoints have different colors, then the number of color-changing edges is odd.
This is **distinct** from `IsAntichain.sperner` in `SetFamily.LYM`, which concerns
antichains in a power set. This file formalizes the topological/combinatorial parity
statement used as the base case in higher-dimensional Sperner arguments.
## Key declarations
- `SpernerColoring`: type-safe coloring via `Fin (n + 1) → ZMod 2`
- `edgeDiff`: color difference on adjacent vertices, computed in `ZMod 2`
- `totalDiff`: telescoping sum of all edge differences
- `diffEdges`: the `Finset` of bichromatic (color-changing) edges
- `sperner_1d`: main theorem — `Odd (diffEdges c).card`
## Design notes
- Using `Fin (n + 1) → ZMod 2` instead of `ℕ → ZMod 2` makes boundary conditions
unrepresentable at the type level, eliminating out-of-bounds cases entirely.
- The proof reduces to a telescoping sum in `ZMod 2`, using `CharTwo.add_self_eq_zero`
to cancel all interior vertices, avoiding parity case splits.
This is intended as the 1D base case, the approach generalizes to higher-dimensional
Sperner's Lemma in future work.
---
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[](https://gitpod.io/from-referrer/)
|
t-combinatorics
new-contributor
awaiting-author
|
133/0 |
Mathlib.lean,Mathlib/Combinatorics/SetFamily/Sperner1D.lean |
2 |
4 |
['YaelDillies', 'github-actions', 'grunweg'] |
YaelDillies assignee:YaelDillies |
15-12136 15 days ago |
15-12136 15 days ago |
54-39797 54 days |
| 38113 |
robo7179 author:robo7179 |
feat(SimpleGraph/PerfectGraph): add lemma graph is perfect iff all su… |
Perfect graph theorem , discussion on zulip thread: [#graph theory > Second Order Monadic Logic](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/Second.20Order.20Monadic.20Logic.20for.20Graph/with/583013775)
- [ ] depends on: #37680
- [ ] depends on: #37598 |
t-combinatorics
new-contributor
blocked-by-other-PR
|
54/0 |
Mathlib/Combinatorics/SimpleGraph/PerfectGraph.lean |
1 |
3 |
['github-actions', 'mathlib-dependent-issues'] |
nobody |
14-83910 14 days ago |
87-25567 87 days ago |
0-69 1 minute |
| 38223 |
Deicyde author:Deicyde |
feat(Geometry/Manifold): add `MfldCat`, the category of `C^n` manifolds |
We define `MfldCat 𝕜 n`: the category of `C^n` manifolds over a field `𝕜`, following the pattern of `TopCat` in
`Mathlib.Topology.Category.TopCat.Basic`. We also implement `HasForget₂ (MfldCat 𝕜 n) TopCat`—the forgetful functor into the category of topological spaces. For more discussion see the Zulip thread: [#PR reviews > #38223 The Category of C^n Manifolds](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2338223.20The.20Category.20of.20C.5En.20Manifolds/with/587038032)
Also added: `ContMDiffMap.id_apply`, `.coe_id` and `.coe_comp` which are comparable to `ContinuousMap` API.
### Future work
- ✅ Define a Monoidal structure via product manifolds, analogous to `Manifold.Topology.Category.TopCat.Monoidal` #38560
- ✅ Define the tangent functor: `M ↦ TM`, `F ↦ F.tangentMap` from `MfldCat (n+1) 𝕜` to `MfldCat n 𝕜` #38270
- Functor `FGModuleCat 𝕜 ⥤ MfldCat 𝕜 n` sending a finite-dimensional `𝕜`-vector space to the manifold modeled on itself. Left as `TODO`.
- Define `FGModuleCat 𝕜` as an enriched category over `MfldCat n 𝕜`. Then _smooth functors_ can be realized as endofunctors on the enriched category. This is the main motivation for this construction.
---
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- [ ] depends on: #41109 [The category of `C^n` manifolds on a fixed model]
[](https://gitpod.io/from-referrer/)
|
t-differential-geometry
new-contributor
t-category-theory
awaiting-author
blocked-by-other-PR
|
224/0 |
Mathlib.lean,Mathlib/Geometry/Manifold/Category/MfldCat/Basic.lean,Mathlib/Geometry/Manifold/ContMDiffMap.lean |
3 |
60 |
['Deicyde', 'chrisflav', 'dagurtomas', 'github-actions', 'idontgetoutmuch', 'mathlib-dependent-issues', 'peabrainiac'] |
joelriou assignee:joelriou |
14-81755 14 days ago |
19-4747 19 days ago |
59-40239 59 days |
| 40561 |
iosephusferrum author:iosephusferrum |
feat(ModelTheory): quantifier elimination for first-order theories |
This PR introduces `HasQuantifierElimination` for first-order languages, along with some standard criteria to establish it for any language that satisfies them and prerequisite formalization `mathlib4` required on elementary extension pairs (`IsElementaryExtensionPair`) and < κ-generated substructures (`CardinalLTGenerated`). It also states and proves that the first-order theory DLO (dense linear order without endpoints) has quantifier elimination (`dlo_hasQuantifierElimination`), using the newly formalized quantifier elimination criteria.
Co-authored-by: Yağız Kaan Aydoğdu <y.kaan.aydogdu@gmail.com>
Co-authored-by: Salih Erdem Koçak <saliherdemkd@gmail.com>
Advised-by: Ayhan Günaydın <ayhan.gunaydin@bogazici.edu.tr>
Advised-by: Metin Ersin Arıcan <metin.arican@bogazici.edu.tr>
---
[](https://gitpod.io/from-referrer/)
Please note that we have utilized agentic AI tools (Claude Opus, ChatGPT Codex) during the development of this PR. Most of the proofs of the major theorems are directly "translated" from human-language source material (check the diff in `references.bib`) to Lean proofs using mentioned AI tools. However, all design/formalization decisions are made by us. |
new-contributor
LLM-generated
|
976/7 |
Mathlib.lean,Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/ElementaryExtensionPair.lean,Mathlib/ModelTheory/FinitelyGenerated.lean,Mathlib/ModelTheory/Order.lean,Mathlib/ModelTheory/PartialEquiv.lean,Mathlib/ModelTheory/QuantifierElimination.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Substructures.lean,Mathlib/Tactic/Linter/TextBased/UnicodeLinter.lean,docs/references.bib |
11 |
6 |
['erdkocak', 'felixpernegger', 'github-actions'] |
nobody |
14-72391 14 days ago |
29-75001 29 days ago |
29-74937 29 days |
| 37819 |
YellPika author:YellPika |
feat(Order/OmegaCompletePartialOrder): add `OmegaCompletePartialOrder` instance for `WithBot` with basic `ωScottContinuous` lemmas |
This is a modification of #34093. See #34093 for details.
---
- [x] depends on: #33941
- [x] depends on: #37258
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[](https://gitpod.io/from-referrer/)
|
new-contributor
t-order
merge-conflict
|
337/10 |
Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Order/Monotone/Basic.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,Mathlib/Order/TypeTags.lean,Mathlib/Order/WithBot.lean |
6 |
6 |
['Komyyy', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
14-22444 14 days ago |
72-49331 72 days ago |
22-11204 22 days |
| 37062 |
tannerduve author:tannerduve |
feat(Computability): Turing join and semilattice structure on Turing degrees |
- Add `Partrec.kronecker` (equality test) and `Partrec.join` (disjoint union by parity) in `Partrec.lean`
- Prove `Nat.RecursiveIn` is closed under computable conditionals (`cond_const`, `cond`)
- Show each component reduces to the join (`left_le_join`, `right_le_join`) and the join is the least upper bound (`join_le`)
- Establish `SemilatticeSup` instance on `TuringDegree` |
t-computability
new-contributor
large-import
awaiting-author
|
311/15 |
Mathlib/Computability/Partrec.lean,Mathlib/Computability/RecursiveIn.lean,Mathlib/Computability/TuringDegree.lean |
3 |
18 |
['Komyyy', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'tannerduve'] |
YaelDillies assignee:YaelDillies |
14-22377 14 days ago |
22-45664 22 days ago |
68-28225 68 days |
| 40537 |
SnkXyx author:SnkXyx |
feat(Algebra/MvPolynomial/Variables): define main degree |
This PR defines the **main degree** of a multivariate polynomial:
* `MvPolynomial.mainDegree p : Multiset σ` :
When `σ` is a linear order, `mainDegree p` is the multiset consisting of the maximal variable
among all variables appearing in `p`, appearing with its largest multiplicity among all monomials
in `p`.
The definition was originally developed in PR #36103 as part of the formalization of the Characteristic Set Method (Wu-Ritt Method). The Characteristic Set project aims to formalize the algorithmic method for solving systems of multivariate polynomial equations in Lean 4, providing foundational infrastructure for algebraic geometry based on triangular decomposition.
---
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[](https://gitpod.io/from-referrer/)
|
t-algebra
new-contributor
label:t-algebra$ |
112/23 |
Mathlib/Algebra/MvPolynomial/CommRing.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/SchwartzZippel.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/RingTheory/MvPolynomial/Basic.lean,Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,Mathlib/RingTheory/MvPolynomial/MonomialOrder/DegLex.lean,Mathlib/RingTheory/MvPowerSeries/Trunc.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/Spectrum/Prime/ChevalleyComplexity.lean |
12 |
14 |
['SnkXyx', 'faenuccio', 'github-actions', 'mathlib-merge-conflicts', 'vlad902'] |
faenuccio assignee:faenuccio |
14-22261 14 days ago |
14-24004 14 days ago |
22-53869 22 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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[](https://gitpod.io/from-referrer/)
|
t-combinatorics
new-contributor
|
199/0 |
Mathlib.lean,Mathlib/Combinatorics/SetFamily/DualVC.lean,docs/references.bib |
3 |
42 |
['Shreyas4991', 'YaelDillies', 'Zetetic-Dhruv', 'github-actions'] |
nobody |
13-63065 13 days ago |
63-75711 63 days ago |
80-36010 80 days |
| 40979 |
thefundamentaltheor3m author:thefundamentaltheor3m |
feat(NumberTheory/ArithmeticFunction/Asymptotics) |
---
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|
t-number-theory
new-contributor
sphere-packing
awaiting-author
|
37/0 |
Mathlib.lean,Mathlib/NumberTheory/ArithmeticFunction/Asymptotics.lean |
2 |
13 |
['b-mehta', 'github-actions', 'loefflerd', 'thefundamentaltheor3m'] |
loefflerd assignee:loefflerd |
13-34751 13 days ago |
13-34775 13 days ago |
5-27115 5 days |
| 35504 |
JoaBjo author:JoaBjo |
feat(Probability/Distributions/Exponential): add MGF, moments, and memoryless property |
feat(Probability/Distributions/Exponential): add MGF, moments, and memoryless property
Add the main analytic results for the exponential distribution:
- moment-generating function `mgf id (expMeasure r) t = r / (r - t)` for `t < r`
- mean `∫ x, x ∂(expMeasure r) = r⁻¹`
- variance `Var[id; expMeasure r] = r⁻¹ ^ 2`
- `ℒp` membership for all `p`
- tail probability `P(X > x) = exp (-(r * x))`
- memoryless property `P(X > s + t | X > s) = P(X > t)`
The MGF is computed by reducing to the known improper integral `∫ exp(c * x)` on `Ioi`,
and integrability is deduced by contradiction from the positive closed-form value.
The mean and variance are computed via the Gamma function integral
`∫₀^∞ x^(n-1) exp(-r x) dx = Γ(n) / rⁿ`. The memoryless property follows from
the exponential identity `exp(-(r(s+t))) = exp(-rt) * exp(-rs)`.
---
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|
new-contributor
t-measure-probability
awaiting-author
large-import
merge-conflict
|
200/0 |
Mathlib/Probability/Distributions/Exponential.lean |
1 |
9 |
['EtienneC30', 'JoaBjo', 'Timeroot', 'github-actions', 'mathlib-merge-conflicts'] |
EtienneC30 assignee:EtienneC30 |
12-83777 12 days ago |
52-14948 52 days ago |
42-10925 42 days |
| 38369 |
quantumsnow author:quantumsnow |
feat(AlgebraicTopology): Eilenberg Steenrod axioms |
This introduces the Eilenberg-Steenrod axioms for a homology theory.
---
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[](https://gitpod.io/from-referrer/)
|
new-contributor
t-algebraic-topology
large-import
|
299/7 |
Mathlib/AlgebraicTopology/EilenbergSteenrod.lean,Mathlib/Topology/Category/TopPair.lean |
2 |
73 |
['chrisflav', 'dagurtomas', 'github-actions', 'joelriou', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'quantumsnow'] |
joelriou assignee:joelriou |
12-63093 12 days ago |
23-18496 23 days ago |
38-59958 38 days |
| 40843 |
ReemMelamed author:ReemMelamed |
feat(Algebra/Divisibility/Basic): introduce right division (RightDvd) |
As suggested by @YaelDillies [here](https://github.com/leanprover-community/mathlib4/pull/40050#issuecomment-4719073791) in #40050, this PR introduces the concept of right division (`RightDvd`) as a relation in `Algebra/Divisibility/Basic`. |
t-algebra
new-contributor
awaiting-author
large-import
label:t-algebra$ |
70/2 |
Mathlib/Algebra/Divisibility/Basic.lean |
1 |
25 |
['ReemMelamed', 'SnirBroshi', 'YaelDillies', 'github-actions', 'vihdzp', 'wwylele'] |
nobody |
12-25422 12 days ago |
15-25574 15 days ago |
6-76645 6 days |
| 41217 |
Probablism author:Probablism |
feat(SimpleGraph/Matching): add graph-level IsMatching |
Closes #11911.
This adds a graph-level `SimpleGraph.IsMatching` predicate. It is support-based, so isolated
vertices are allowed: every vertex in the graph support is incident to exactly one edge.
The existing `Subgraph.IsMatching` predicate is unchanged. I added compatibility lemmas relating it
to `M.spanningCoe`, including an iff characterizing the subgraph predicate as graph-level matching
plus `M.support = M.verts`.
Validation:
- `lake env lean Mathlib/Combinatorics/SimpleGraph/Matching.lean`
- `lake build Mathlib.Combinatorics.SimpleGraph.Matching`
- `lake build Mathlib.Combinatorics.SimpleGraph.Hall Mathlib.Combinatorics.SimpleGraph.Tutte Mathlib.Combinatorics.SimpleGraph.UniversalVerts`
- `lake exe lint-style Mathlib/Combinatorics/SimpleGraph/Matching.lean`
- `lake build Mathlib`
- `lake test`
AI assistance: OpenAI Codex assisted with testing and validation.
|
t-combinatorics
new-contributor
|
41/3 |
Mathlib/Combinatorics/SimpleGraph/Matching.lean |
1 |
4 |
['Probablism', 'SnirBroshi', 'github-actions'] |
nobody |
11-65624 11 days ago |
11-66813 11 days ago |
11-66463 11 days |
| 36770 |
Xmask19 author:Xmask19 |
feat: invariance of domain via Brouwer's fixed point theorem |
Continuous and injective maps from Rn to Rn are open mappings. This is shown given Brouwer's fixed point theorem. The specific version of Brouwer's theorem assumed is that a continuous map from the closed unit ball to itself has a fixed point. It is used to show a lemma in this proof. Then assuming that invariance of domain isn't true gives a contradiction with this lemma.
---
My supervisor has code for studying topological manifolds which relies on invariance of domain that can be found here: https://github.com/stevensivek/TopologicalManifolds and is planned to be submitted to Mathlib.
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[](https://gitpod.io/from-referrer/)
|
t-topology
new-contributor
large-import
merge-conflict
|
1587/5 |
Mathlib.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/AlgebraicTopology/InvarianceOfDomain.lean,Mathlib/Analysis/Convex/GaugeRescale.lean,Mathlib/Topology/Closure.lean,Mathlib/Topology/Order.lean |
6 |
3 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
11-61529 11 days ago |
17-78182 17 days ago |
0-7022 1 hour |
| 37299 |
XC0R author:XC0R |
feat(NumberTheory): Chebyshev's lower bound on primorial |
## Summary
Prove `primorial(n) ≥ 2^(n/2)` for all `n ≥ 2` (Chebyshev's 1852 lower bound). This is the lower bound complement to `primorial_le_four_pow`. Addresses the TODO at `Chebyshev.lean` line 50: "Prove Chebyshev's lower bound."
### New file: `Mathlib/NumberTheory/PrimorialLowerBound.lean`
**Main theorems:**
- `two_pow_le_primorial`: `2 ^ n ≤ primorial (2 * n)` for `n ≥ 29`
- `two_pow_div_two_le_primorial`: `2 ^ (n / 2) ≤ primorial n` for `n ≥ 2`
**Key intermediates:**
- `centralBinom_le_pow_mul_primorial`: `C(2n,n) ≤ (2n)^{π(√(2n)+1)} * primorial(2n)`
- `eight_mul_sq_add_le_two_pow`: `8u² + 16u + 8 ≤ 2^u` for `u ≥ 10`
### Proof technique
Central binomial decomposition: from `four_pow_lt_mul_centralBinom` and `factorization_choose_le_log`, bound `C(2n,n)` above by `(2n)^{π(√(2n)+1)} * primorial(2n)`. Rearranging gives `primorial(2n) ≥ 2^n` for `n ≥ 29`. Base cases by `norm_num` + `decide`, large `n` analytically via `√n` factoring.
### AI disclosure
Claude (Anthropic) was used as a coding assistant for Lean tactic exploration, file structuring, and CI debugging. All proof strategy, mathematical content, and final code have been reviewed and are understood by the author. |
t-number-theory
new-contributor
awaiting-author
merge-conflict
|
226/2 |
Mathlib/NumberTheory/Chebyshev.lean,Mathlib/NumberTheory/Primorial.lean |
2 |
54 |
['MichaelStollBayreuth', 'Parcly-Taxel', 'XC0R', 'github-actions', 'mathlib-merge-conflicts', 'wwylele'] |
MichaelStollBayreuth assignee:MichaelStollBayreuth |
11-61404 11 days ago |
92-84182 92 days ago |
13-62238 13 days |
| 41165 |
gnahz04 author:gnahz04 |
feat(Analysis/InnerProductSpace): the representer theorem |
Adds the representer theorem (Schölkopf version): infinite dimensional kernel space represented by finite number of data points.
Discussed in #mathlib4 ("RKHS representer theorem").
**AI disclosure.** I used Claude Code (Claude Opus 4.8) to draft and iterate the Lean proof. I work in kernel methods / RKHS, understand the statement and proof, and can justify the design choices to reviewers.
🤖 Generated with [Claude Code](https://claude.com/claude-code) |
t-analysis
new-contributor
LLM-generated
|
41/0 |
Mathlib/Analysis/InnerProductSpace/Reproducing.lean |
1 |
5 |
['felixpernegger', 'github-actions', 'gnahz04'] |
nobody |
11-55799 11 days ago |
12-85028 12 days ago |
12-84678 12 days |
| 40050 |
ReemMelamed author:ReemMelamed |
feat(Algebra/Group/GreensRelations): add definitions for Green's relations |
This PR introduces the foundational definitions for Green's relations (L, R, H, D, and J) on semigroups.
This is the first in a series of PRs aimed at formalizing Green's relations for semigroups.
[Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Formalization.20of.20Green.27s.20Relations.20for.20semigroups/with/598557876)
---
- [ ] depends on: #40843 |
t-algebra
new-contributor
blocked-by-other-PR
label:t-algebra$ |
386/0 |
Mathlib.lean,Mathlib/Algebra/Divisibility/Basic.lean,Mathlib/Algebra/Group/GreensRelations/Basic.lean,Mathlib/Algebra/Group/GreensRelations/Defs.lean |
4 |
23 |
['ReemMelamed', 'YaelDillies', 'YanYablonovskiy', 'github-actions', 'mathlib-bors', 'mathlib-dependent-issues'] |
nobody |
11-44345 11 days ago |
22-14411 22 days ago |
19-1906 19 days |
| 30637 |
strihanje01 author:strihanje01 |
feat(Combinatorics/SetFamily/Lindstrom): Lindstrom's theorem for subfamilies with equal unions |
add Lindstrom's theorem and its strengthening for equal intersections
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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|
t-combinatorics
new-contributor
|
211/0 |
Mathlib.lean,Mathlib/Combinatorics/SetFamily/Lindstrom.lean |
2 |
2 |
['github-actions', 'mathlib4-merge-conflict-bot'] |
b-mehta assignee:b-mehta |
11-29563 11 days ago |
11-30158 11 days ago |
42-79304 42 days |
| 40768 |
AlexeyMilovanov author:AlexeyMilovanov |
Add a reachability characterization for PFun.fix |
Add a `ReflTransGen` characterization of `PFun.fix` and use it to simplify one Turing machine proof. |
new-contributor |
27/13 |
Mathlib/Computability/TuringMachine/Config.lean,Mathlib/Data/PFun.lean |
2 |
2 |
['github-actions'] |
nobody |
11-20599 11 days ago |
11-20599 11 days ago |
11-20249 11 days |
| 26923 |
oliver-butterley author:oliver-butterley |
feat(Dynamics/BirkhoffSum): add the pointwise ergodic theorem (Birkhoff's) |
The Pointwise Ergodic Theorem, also known as Birkhoff's Ergodic Theorem.
Co-authored-by: Lua Viana Reis <me@lua.blog.br>
- [x] depends on: #26074
- [x] depends on: #26807
- [x] depends on: #26810
- [x] depends on: #26840
- [x] depends on: #26842
- [x] depends on: #26848
- [x] depends on: #26851
- [x] depends on: #26852
- [x] depends on: #26853
- [x] depends on: #27008
- [x] depends on: #28901
Zulip: [PR thread](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2326923.20The.20pointwise.20ergodic.20theorem.20.28Birkhoff's.29/with/527835158)
---
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|
t-dynamics
new-contributor
awaiting-author
|
398/0 |
Mathlib.lean,Mathlib/Dynamics/BirkhoffSum/Pointwise.lean |
2 |
32 |
['D-Thomine', 'github-actions', 'leanprover-community-bot-assistant', 'lua-vr', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'rwst', 'sgouezel', 'urkud'] |
sgouezel assignee:sgouezel |
10-82178 10 days ago |
207-81446 207 days ago |
98-50945 98 days |
| 40368 |
Sanghyeok0 author:Sanghyeok0 |
feat: add confluence predicates for relations |
This PR adds relation-level predicates for confluence-style properties:
* `Relation.Diamond`
* `Relation.Confluent`
* `Relation.ChurchRosser`
* `Relation.StronglyConfluent`
It also adds basic API connecting these predicates:
* `Relation.ReflTransGen.to_eqvGen`
* `Relation.Join.to_eqvGen`
* `Relation.StronglyConfluent.confluent`
* `Relation.ChurchRosser.confluent`
* `Relation.Confluent.churchRosser`
* `Relation.StronglyConfluent.churchRosser`
* `Relation.confluent_iff_churchRosser`
The terminology follows standard usage in abstract rewriting systems, including the diamond property, confluence, the Church-Rosser property, and strong confluence.
The existing theorem `Relation.church_rosser` is kept unchanged. In terms of the new predicates, its hypothesis is `Relation.StronglyConfluent r`, and its conclusion is `Relation.Confluent r`. This PR therefore adds `Relation.StronglyConfluent.confluent` as the corresponding named API while preserving the existing declaration.
References: the Wikipedia pages on abstract rewriting systems and confluence, and *Gröbner Bases: A Computational Approach to Commutative Algebra*.
---
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|
t-logic
new-contributor
merge-conflict
|
92/3 |
Mathlib/Logic/Relation.lean |
1 |
8 |
['Sanghyeok0', 'chenson2018', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
10-71286 10 days ago |
10-71287 10 days ago |
23-11791 23 days |
| 36698 |
ghseeli author:ghseeli |
feat(Combinatorics/Enumerative): Latin squares |
This PR defines Latin rectangles and Latin squares and proves an extension theorem using Hall's Marriage Theorem.
## Main results
- `group_to_cayley_table`: every finite group `G` yields a `LatinSquare G G`.
- `latin_rectangle_extends_one_row`: a (non-square) `LatinRectangle` extends to a `LatinRectangle`
with one more row. This is an application of **Hall's Marriage Theorem**, `hallMatchingsOn.nonempty`.
- `latin_rectangle_extends_to_latin_square`: a `LatinRectangle` extends to a `LatinSquare`.
This is included in a new file `Combinatorics/Enumerative/LatinSquare.lean`.
---
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[](https://gitpod.io/from-referrer/)
|
new-contributor
t-combinatorics
|
646/0 |
Mathlib.lean,Mathlib/Combinatorics/Enumerative/DoubleCounting.lean,Mathlib/Combinatorics/Enumerative/LatinSquare.lean,Mathlib/Combinatorics/Pigeonhole.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Fintype/Card.lean,docs/references.bib |
7 |
81 |
['SnirBroshi', 'cjrl', 'eric-wieser', 'ghseeli', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vlad902'] |
nobody |
10-64587 10 days ago |
10-67181 10 days ago |
27-78367 27 days |
| 39530 |
RaggedR author:RaggedR |
feat(Combinatorics/SimpleGraph): group actions on simple graphs |
This adds the first connection between Mathlib's MulAction and SimpleGraph libraries. The GraphAction class asserts that a group action on the vertex type preserves the adjacency relation, and builds on it to define vertex-transitivity and arc-transitivity for graphs.
The GraphAction typeclass gives adj_smul_iff (the biconditional for group actions) and toIso (each group element induces a graph automorphism). The IsVertexTransitive class combines GraphAction with IsPretransitive, and IsArcTransitive requires transitivity on ordered adjacent pairs (arcs).
The main theorem is the standard characterization: a graph is arc-transitive if and only if it is vertex-transitive and locally transitive (the stabilizer of each vertex acts transitively on its neighbors). The forward direction is proved directly by composing a vertex-transporting element with a neighbor-transporting stabilizer element. The reverse direction shows that an arc-transitive graph with no isolated vertices is vertex-transitive.
These definitions are the algebraic graph theory prerequisites for formalizing coset graphs (Sabidussi's construction) and the characterization of symmetric graphs via double cosets and involutions (Lorimer's theorem).
---
LLM tools were used to assist with Lean formalization. The mathematical content is the author's own work. |
t-combinatorics
new-contributor
LLM-generated
|
130/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Action.lean |
2 |
7 |
['RaggedR', 'b-mehta', 'github-actions', 'mathlib-bors'] |
b-mehta assignee:b-mehta |
10-49954 10 days ago |
50-26976 50 days ago |
54-81476 54 days |
| 41258 |
ungatz author:ungatz |
feat(Analysis/Fourier/FiniteAbelian): add the Donoho-Stark support uncertainty principle |
This adds the Donoho–Stark support uncertainty inequality for the unitary Fourier transform on a finite abelian group, plus the supporting Fourier-inversion machinery indexed by the Pontryagin dual `AddChar G ℂ`.
The headline:
> **Theorem `AddChar.donoho_stark`.** For nonzero `f : G → ℂ`,
> `Fintype.card G ≤ (support f).ncard * (support (fourierTransform f)).ncard`,
> where `fourierTransform f ψ = |G|^(-1/2) * ∑ g, conj (ψ g) * f g` ranges over `ψ : AddChar G ℂ`.
The proof is the elementary (L¹, L∞) duality argument that any harmonic-analysis textbook gives for the classical `ZMod N` case; no Parseval or Cauchy–Schwarz is needed. The finite-abelian generalisation is folklore (stated in Tao–Vu *Additive Combinatorics* and Terras *Fourier Analysis on Finite Groups*); I did not find it formalised in Mathlib or any other major library.
### Why this belongs in Mathlib
Mathlib already has the supporting infrastructure — character theory of finite abelian groups (`Mathlib.Algebra.Group.AddChar`), character orthogonality and Pontryagin duality (`Mathlib.Analysis.Fourier.FiniteAbelian.{Orthogonality, PontryaginDuality}`). The Donoho–Stark inequality is the canonical application of all three, and its absence is a real gap: I needed it for a downstream operator-uncertainty result (a diagonal-operator `rank * Pauli-support` bound on the finite Heisenberg group reduces to it) and ended up proving it from scratch. Beyond that use, it is a standard tool in compressed sensing on finite abelian groups, additive combinatorics, and discrete signal recovery (the 1989 paper has ~3500 citations).
### What's in this PR
A single new file, `Mathlib/Analysis/Fourier/FiniteAbelian/DonohoStark.lean`:
- `AddChar.fourierTransform` — the unitary (symmetric) Fourier transform indexed by `AddChar G ℂ`;
- `AddChar.fourier_inversion` — the inversion formula;
- `AddChar.norm_fourierTransform_le`, `AddChar.norm_le_sum_norm_fourierTransform` — the two `L∞ ≤ |G|^(-1/2) · L¹` triangle bounds;
- `AddChar.donoho_stark` — the support uncertainty inequality.
Design choices I expect questions on, and my defaults:
- **`ℂ` rather than `RCLike`**: matches the cited literature and the cleanest home of `AddChar.norm_apply`; happy to generalise if preferred.
- **`Set.ncard` for support sizes**: avoids needing `DecidableEq ℂ` in the statement.
- **A new sibling file** of `Orthogonality.lean` / `PontryaginDuality.lean` rather than a subsection: orthogonality is the tool, Donoho–Stark is the application; can inline if preferred.
Deliberately *not* included: the diagonal-operator `rank * Pauli-support ≥ 2^n` corollary from my workspace — the Pauli-word machinery has no natural home in `Analysis/Fourier` yet; happy to factor it into a follow-up if there is interest.
### AI usage disclosure
Per the [AI contribution policy](https://leanprover-community.github.io/contribute/index.html): the original Lean proof was generated by **Aristotle** (Harmonic AI's automated proof system) from a dispatch containing the statement and the (L¹, L∞) proof strategy, as part of my PhD research workspace. I audited the delivery line by line against Donoho–Stark 1989 (the dispatch also produced a kernel-checked counterexample to a tempting wrong variant — replacing rank by the count of distinct eigenvalues — which the 2×2 identity falsifies). The file here is my adaptation to Mathlib conventions and to current master (module system, `Set.ncard` statement, robust cast handling in the inversion proof), with final tactic-level repairs done with the assistance of Claude (Anthropic). I understand and can defend every line without AI assistance. Please add the `LLM-generated` label (I cannot set labels myself).
### Test plan
- [x] `lake build Mathlib.Analysis.Fourier.FiniteAbelian.DonohoStark` clean (0 errors, 0 warnings).
- [x] `#print axioms` on all five declarations: `[propext, Classical.choice, Quot.sound]`.
- [x] `lake exe lint-style` clean; all lines ≤ 100 chars.
- [x] `Mathlib.lean` updated in alphabetical position.
- [x] Imports minimal (`PontryaginDuality` + `RCLike.Basic` only).
### Reference
Donoho, D. L. and Stark, P. B. (1989). *Uncertainty principles and signal recovery.* SIAM Journal on Applied Mathematics, **49**(3): 906–931. https://doi.org/10.1137/0149053
---
|
t-analysis
new-contributor
LLM-generated
|
283/0 |
Mathlib.lean,Mathlib/Analysis/Fourier/FiniteAbelian/DonohoStark.lean |
2 |
4 |
['copilot-pull-request-reviewer', 'felixpernegger', 'github-actions'] |
nobody |
10-41947 10 days ago |
10-69673 10 days ago |
10-69323 10 days |
| 40835 |
Gracie-z author:Gracie-z |
feat(Probability): add Paley-Zygmund inequality |
Add the Paley-Zygmund inequality: for a nonneg random variable Z with finite variance and 0 ≤ θ ≤ 1,
(1-θ)² E[Z]² ≤ E[Z²] · P(Z > θ E[Z]).
The proof uses Jensen's inequality applied to x² on the set {Z > θ E[Z]}.
AI disclosure: I used Claude Code as a learning aid while writing this proof. It helped me find the right Mathlib lemma names and understand tactic syntax, but I wrote every line of code myself.
---
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[](https://gitpod.io/from-referrer/)
|
t-measure-probability
new-contributor
awaiting-author
|
85/0 |
Mathlib.lean,Mathlib/Probability/PaleyZygmund.lean |
2 |
20 |
['CoolRmal', 'Gracie-z', 'SnirBroshi', 'github-actions'] |
EtienneC30 assignee:EtienneC30 |
10-41257 10 days ago |
10-41257 10 days ago |
12-8119 12 days |
| 40224 |
AlexBrodbelt author:AlexBrodbelt |
feat(Tactic/Group): strengthen the group tactic and add tests |
Following the suggestion from Floris Van Doorn, this PR keeps the group tactic as an invocation of a suitable simp-set.
The group tactic is improved to:
Once simplification on the exponents is done, apply left and right cancellation. That is, to normalise expressions like `a * b = a * c` to `b * c`. In particular, an elaborator for traversing the syntax tree to efficiently simplify expressions like:
- `a * b^(-3) = c * b^(-3)` to `a = c` - apply right cancellation
- `a^3 * b = a^2 * c` to `a * b = c` - apply left cancellation and reduce exponent
- `a^7 * b = a^(-3) * c` to `a^10 * b = c` - apply right and increase exponent to being positive
- `a * b^5 = c * b` to `a * b^4 = c` - apply right cancellation and reduce exponent
Apply a post-processing where expression of the form ( · )^(-1) are normalised to use the inversion notation ( · )⁻¹. This allows immediately using lemmas involving inversion which is how most lemmas are stated.
*Limitations*
- It cannot deal with cycling to simplify the expression
`b ^ 17 * c⁻¹ * d * b ^ 3 = 1` to `b^20 * c⁻¹ * d`
and cannot not close
- `(a * b *c)^m * a * b * (c * a * b)^n * c = (a * b * c)^(n + m +1)`
---
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|
t-meta
new-contributor
WIP
|
190/10 |
Mathlib/Tactic/Group.lean,MathlibTest/Tactic/Group.lean |
2 |
4 |
['github-actions', 'grunweg'] |
nobody |
10-21253 10 days ago |
38-14803 38 days ago |
0-601 10 minutes |
| 41241 |
intgrah author:intgrah |
feat(Order/Category): cartesian closed and distributive structure on PartOrd and Preord |
Give `PartOrd` and `Preord` `CartesianMonoidalCategory`, `MonoidalClosed`, and `IsCartesianDistributive` instances.
---
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[](https://gitpod.io/from-referrer/)
|
new-contributor
t-order
|
272/0 |
Mathlib.lean,Mathlib/Order/Category/PartOrd/CartesianClosed.lean,Mathlib/Order/Category/PartOrd/Distributive.lean,Mathlib/Order/Category/Preord/CartesianClosed.lean,Mathlib/Order/Category/Preord/Distributive.lean |
5 |
5 |
['github-actions', 'intgrah'] |
nobody |
9-80422 9 days ago |
11-18600 11 days ago |
11-18250 11 days |
| 29871 |
zach1502 author:zach1502 |
feat(Matrix/Transvection): Gauss pivot determinant identity and pivot preservation |
This PR adds two lemmas formalizing standard Gaussian pivot identities:
* `Matrix.Transvection.listTransvecCol_mul_mul_listTransvecRow_pivot`:
After applying the canonical left/right transvection products that clear the last column and row,
the pivot (bottom-right) entry of a matrix is unchanged.
Marked `@[simp]`.
* `Matrix.Transvection.det_eq_detTopLeft_mul_pivot`:
If the pivot entry is nonzero, then the determinant of the matrix factors as
the determinant of the top-left block times the pivot entry, after performing
the canonical transvections.
This is the usual Gauss–pivot determinant identity.
* Added simple usage tests in `MathlibTest/matrix.lean` to check that the new lemmas
are usable by `simp`/`simpa`.
---
---
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|
awaiting-author
t-algebra
new-contributor
merge-conflict
label:t-algebra$ |
94/0 |
Mathlib/LinearAlgebra/Matrix/Transvection.lean,MathlibTest/matrix.lean |
2 |
4 |
['github-actions', 'mathlib-merge-conflicts', 'riccardobrasca', 'zach1502'] |
nobody |
9-71409 9 days ago |
251-25881 251 days ago |
41-53612 41 days |
| 37716 |
slavanaprienko author:slavanaprienko |
feat(LinearAlgebra/Matrix/Determinant): Desnanot-Jacobi identity |
This PR adds the Desnanot-Jacobi identity (also known as the Lewis Carroll identity or Dodgson condensation): for any (n+2)×(n+2) matrix M over a commutative ring,
$$\det(M) \cdot \det(M_{1,n}^{1,n}) = \det(M_1^1) \cdot \det(M_n^n) - \det(M_1^n) \cdot \det(M_n^1)$$
The proof follows Bressoud's *Proofs and Confirmations* (Cambridge University Press, 1999): multiply M by an auxiliary matrix built from columns of the adjugate, then compare determinants. This yields the identity premultiplied by det(M). To cancel, we pass to a universal polynomial ring (an integral domain with nonzero determinant), then specialize back to arbitrary commutative rings.
It seems there's some interest in adding this:
https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Determinantal.20identity.20and.20the.20Cauchy.20matrix.20determinant/with/582946873
--- |
t-algebra
new-contributor
merge-conflict
label:t-algebra$ |
217/0 |
Mathlib.lean,Mathlib/LinearAlgebra/Matrix/Determinant/DesnanotJacobi.lean |
2 |
14 |
['SnirBroshi', 'github-actions', 'grunweg', 'kim-em', 'mathlib-merge-conflicts', 'slavanaprienko'] |
ocfnash assignee:ocfnash |
9-69335 9 days ago |
9-69336 9 days ago |
53-49476 53 days |
| 40337 |
Robby955 author:Robby955 |
feat(Probability): add condExpKernel prefix support |
## Summary
This draft adds reusable conditional-kernel support for finite product measures and an explicit prefix/tail decomposition for `condExpKernel` on `Fin n -> Ω`.
The main new explicit statement is `ProbabilityTheory.condExpKernel_piPrefix_eq_dirac_prod_pi`: for a product probability measure, conditioning on the prefix-coordinate sigma-algebra gives the kernel that keeps the prefix fixed and samples the remaining coordinates independently from the corresponding tail product.
## Changes
- Add `MeasurableSpace.piPrefixRestrict` and define `MeasurableSpace.piPrefix` as the comap along that restriction map.
- Add prefix measurability helpers for the coordinate sub-sigma-algebra.
- Add `ProbabilityTheory.Kernel.piPrefixTailFromPrefix` and `ProbabilityTheory.Kernel.piPrefixTail` for the explicit prefix-fixed/tail-product kernel.
- Add `ProbabilityTheory.condExpKernel_piPrefix_eq_dirac_prod_pi`, the explicit a.e. kernel equality for product probability measures.
- Keep `ProbabilityTheory.condExpKernel_piPrefix_ae_eq`, the finite-product prefix-coordinate support theorem.
- Extend `MathlibTest/CondExpKernelPiPrefix.lean` with an elaboration check for the explicit kernel equality.
## Verification
Local:
- `lake env lean Mathlib/Probability/Kernel/Condexp.lean`
- `lake env lean MathlibTest/CondExpKernelPiPrefix.lean`
- `lake build Mathlib.Probability.Kernel.Condexp`
- `lake exe runLinter --trace Mathlib.Probability.Kernel.Condexp`
- `#print axioms ProbabilityTheory.condExpKernel_piPrefix_eq_dirac_prod_pi`
- `#print axioms ProbabilityTheory.condExpKernel_piPrefix_ae_eq`
- `git diff --check`
`lake -Kthreads=1 test` was run locally, but this machine hit an OS file-table exhaustion error near the end of `MathlibTest` targets. The GitHub fork CI completed the full build, `test mathlib`, lint, style, cache upload, and post-build checks successfully on the PR head.
Axiom checks report only `[propext, Classical.choice, Quot.sound]` for the two public prefix theorems above.
## Risk / Rollback
No migrations, dependency changes, security-sensitive behavior, or user-facing runtime behavior. Roll back by reverting the prefix-kernel additions in `Mathlib/Probability/Kernel/Condexp.lean` and the corresponding `MathlibTest` checks.
## Disclaimers:
PR and post written by myself, Claude Code and whispr are used in coding and formatting. Claude Code also was used to do a review of the repo. |
t-measure-probability
new-contributor
LLM-generated
|
343/1 |
Mathlib/Probability/Kernel/Condexp.lean,MathlibTest/CondExpKernelPiPrefix.lean |
2 |
3 |
['felixpernegger', 'github-actions'] |
kex-y assignee:kex-y |
9-63989 9 days ago |
33-68877 33 days ago |
33-68527 33 days |
| 37350 |
aditya-ramabadran author:aditya-ramabadran |
feat(Analysis/Distribution): define the map from test functions to Schwartz functions |
Defines the canonical continuous linear map from test functions to Schwartz functions.
---
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- Vector.* -> List.Vector.*
- ...
Deletions:
- Nat.bit1_add_bit1
- ...
Any other comments you want to keep out of the PR commit should go
below the `---`, and placed outside this HTML comment, or else they
will be invisible to reviewers.
If this PR depends on other PRs, please list them below this comment,
using the following format:
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- [ ] depends on: #xyz [optional extra text]
-->
This PR originally also included the induced map from tempered distributions to distributions,
`𝓢'(E, F) →ₗ[ℂ] 𝓓'(Ω, F)`, via a real-to-complex bridge
`𝓓(Ω, ℝ) →L[ℝ] 𝓢(E, ℂ)`. After feedback from @mcdoll , I removed that second part from this PR so that the `𝓓 → 𝓢` map can be merged separately / later in a follow up PR after we figure out the best way to do it.
**Old description:**
Put in a separate file since Distribution.lean only imports TestFunction right now and I thought it was cleaner to do in a new bridge file with both the maps. Open to changing this though.
* Made use of #36445 (proved first map locally on fixed support spaces first by local seminorm estimates, then used limitCLM)
* Needed a real to complex bridge `TestFunction.ToComplexSchwartzMap` since distributions are defined on real-valued test functions but tempered distributions in mathlib are defined on complex-valued Schwartz functions
* Induced map $\mathcal S'(E,F) \to \mathcal D'(Ω,F)$ is $\mathbb C$-linear
The main important defs are `ContDiffMapSupportedIn.toSchwartzMapCLM` which is the local fixed-support part, then `TestFunction.toSchwartzMapCLM` (where the continuity uses limitCLM to glue the local continuous linear maps on each $\mathcal D_K$), and `TemperedDistribution.toDistributionLM` which is the linear map from tempered distributions to ordinary distributions.
Tested with `lake env lean Mathlib/Analysis/Distribution/TestFunctionSchwartz.lean`
[](https://gitpod.io/from-referrer/)
|
t-analysis
new-contributor
awaiting-author
|
143/0 |
Mathlib.lean,Mathlib/Analysis/Distribution/TestFunctionSchwartz.lean |
2 |
27 |
['aditya-ramabadran', 'github-actions', 'j-loreaux', 'luigi-massacci', 'mcdoll'] |
mcdoll assignee:mcdoll |
9-38753 9 days ago |
9-38753 9 days ago |
80-32218 80 days |
| 39239 |
alainchmt author:alainchmt |
feat(FieldTheory/Finite): irreducible polynomial divides X^q^n - X iff degree divides n |
---
Add the theorem saying that, for an irreducible polynomial `f` over a finite field `K`, the degree of `f` divides `n` if and only if `f` divides `X ^ (Nat.card K) ^ n - X`. Include auxiliary lemmas.
<!-- Your PR title will become the first line of the commit message.
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For details on the "pull request lifecycle" in mathlib, please see:
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In particular, note that most reviewers will only notice your PR
if it passes the continuous integration checks.
Please ask for help on https://leanprover.zulipchat.com if needed.
When merging, all the commits will be squashed into a single commit
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Co-authors in the squash commit are gathered from two sources:
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may create empty commits to indicate co-authorship, using commands like so:
git commit --author="Author Name <author@email.com>" --allow-empty -m "add Author Name as coauthor"
Second, co-authors can also be listed in lines at the very bottom of
the commit message (that is, directly before the `---`) using the following format:
Co-authored-by: Author Name <author@email.com>
If you are moving or deleting declarations, please include these lines
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any "Co-authored-by" lines) using the following format:
Moves:
- Vector.* -> List.Vector.*
- ...
Deletions:
- Nat.bit1_add_bit1
- ...
Any other comments you want to keep out of the PR commit should go
below the `---`, and placed outside this HTML comment, or else they
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If this PR depends on other PRs, please list them below this comment,
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- [ ] depends on: #xyz [optional extra text]
-->
[](https://gitpod.io/from-referrer/)
|
t-algebra
new-contributor
label:t-algebra$ |
34/0 |
Mathlib/FieldTheory/Finite/Extension.lean,Mathlib/FieldTheory/Minpoly/Field.lean |
2 |
2 |
['github-actions'] |
mattrobball assignee:mattrobball |
8-63996 8 days ago |
61-31458 61 days ago |
61-31108 61 days |
| 40973 |
certik author:certik |
feat: multiplicative automatic continuity on ℝ |
This PR adds the multiplicative companion of the existing additive automatic-continuity theorem `AddMonoidHom.continuous_of_measurable`. See the git commit descriptions for all the details.
Depends on https://github.com/leanprover-community/mathlib4/pull/40976.
AI usage disclosure: I used Claude Opus 4.8 to create the theorems and proofs in my own Lean project, then extracted them into this PR since I think they are general purpose and would be useful for other people. I iterated on the proofs until they are as simple as I could get them. I am new to Lean, so if something should be reworked, please let me know. Lean is amazing, I was able to use it to prove various theorems and check my derivations. This is my little contribution back to the project. |
t-measure-probability
LLM-generated
new-contributor
|
159/0 |
Mathlib.lean,Mathlib/MeasureTheory/Measure/Haar/AutomaticContinuity.lean |
2 |
10 |
['certik', 'github-actions', 'mathlib-merge-conflicts', 'wwylele'] |
EtienneC30 assignee:EtienneC30 |
8-63994 8 days ago |
15-41521 15 days ago |
17-64868 17 days |
| 41337 |
gotrevor author:gotrevor |
doc(1000-yaml): add Goodstein's theorem and the Kirby–Paris theorem |
Claims two listed-but-unclaimed entries in the 1000+ theorems scoreboard by adding external-formalization pointers (no mathlib declaration; same pattern as Löb's theorem [`Q204884`](https://github.com/leanprover-community/mathlib4/blob/master/docs/1000.yaml#L201), the flypitch continuum-hypothesis independence [`Q208416`](https://github.com/leanprover-community/mathlib4/blob/master/docs/1000.yaml#L216), and Arrow's impossibility theorem [`Q33481`](https://github.com/leanprover-community/mathlib4/blob/master/docs/1000.yaml#L30)).
## Entries
| Wikidata | Theorem | Formalization |
|----------|---------|---------------|
| `Q1149185` | **Goodstein's theorem** — every Goodstein sequence terminates | [`lean-gallery`](https://github.com/gotrevor/lean-gallery/blob/main/LeanGallery/Logic/Goodstein/Statement.lean) (ordinal-descent proof) |
| `Q1149185X` | **Kirby–Paris theorem** — PA does not prove that every Goodstein sequence terminates | [`goodstein-independence`](https://github.com/gotrevor/goodstein-independence/blob/main/src/GoodsteinPA/Statement.lean) |
## Notes
- **`Q1149185X` (Kirby–Paris, 1982)** is built on the [`FormalizedFormalLogic/Foundation`](https://github.com/FormalizedFormalLogic/Foundation) library (the same library that backs the existing Löb's-theorem entry [`Q204884`](https://github.com/leanprover-community/mathlib4/blob/master/docs/1000.yaml#L201)), via the Wainer growth-rate route (`Goodstein` outgrows every PA-provably-total function). The headline `peano_not_proves_goodstein` is sorry-free and `#print axioms`-clean — it rests on exactly `[propext, Classical.choice, Quot.sound]`.
- **`Q1149185`** is Goodstein's theorem proper (the termination statement, provable in ZFC / Lean); mathlib does not currently contain it.
- Both formalizations are by Trevor Morris, developed with AI assistance: Claude Code (Fable 5, Opus), Codex, and Harmonic's Aristotle.
🤖 Generated with [Claude Code](https://claude.com/claude-code) |
new-contributor
LLM-generated
|
6/0 |
docs/1000.yaml |
1 |
4 |
['felixpernegger', 'github-actions'] |
nobody |
8-61311 8 days ago |
8-63566 8 days ago |
8-63216 8 days |
| 40953 |
ymonbru author:ymonbru |
feat: the definition of a KSheaf on a T2 Space |
This files adds the definition of a KSheaf on a T2 space with value in an arbitrary category.
One may expect this notion to come from sheaves on a site of compact subset of a topological space but there is no coresponding Grothendieck topology on compact subsets. In particular, this is because one of the axioms is in the form of a colimit and can't be expressed as a limit condition (hence a sheaf condition).
It also adds API that allow to use the axioms in a convenient way.
---
- [ ] depends on: #40737
<!-- 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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details. Please leave a blank newline before the `---`, otherwise GitHub
will format the text above it as a title.
For details on the "pull request lifecycle" in mathlib, please see:
https://leanprover-community.github.io/contribute/index.html
In particular, note that most reviewers will only notice your PR
if it passes the continuous integration checks.
Please ask for help on https://leanprover.zulipchat.com if needed.
When merging, all the commits will be squashed into a single commit
listing all co-authors.
Co-authors in the squash commit are gathered from two sources:
First, all authors of commits to this PR branch are included. Thus,
one way to add co-authors is to include at least one commit authored by
each co-author among the commits in the pull request. If necessary, you
may create empty commits to indicate co-authorship, using commands like so:
git commit --author="Author Name <author@email.com>" --allow-empty -m "add Author Name as coauthor"
Second, co-authors can also be listed in lines at the very bottom of
the commit message (that is, directly before the `---`) using the following format:
Co-authored-by: Author Name <author@email.com>
If you are moving or deleting declarations, please include these lines
at the bottom of the commit message (before the `---`, and also before
any "Co-authored-by" lines) using the following format:
Moves:
- Vector.* -> List.Vector.*
- ...
Deletions:
- Nat.bit1_add_bit1
- ...
Any other comments you want to keep out of the PR commit should go
below the `---`, and placed outside this HTML comment, or else they
will be invisible to reviewers.
If this PR depends on other PRs, please list them below this comment,
using the following format:
- [ ] depends on: #abc [optional extra text]
- [ ] depends on: #xyz [optional extra text]
-->
[](https://gitpod.io/from-referrer/)
|
new-contributor |
133/0 |
Mathlib.lean,Mathlib/Topology/Sheaves/KSheaf.lean |
2 |
9 |
['github-actions', 'joelriou', 'mathlib-dependent-issues', 'ymonbru'] |
nobody |
8-37810 8 days ago |
8-37810 8 days ago |
8-48195 8 days |
| 41358 |
erdkocak author:erdkocak |
doc(ModelTheory): fix partial equivalence theorem reference |
Fix a stale module doc reference in `ModelTheory.PartialEquiv`: the theorem is `equiv_between_cg`, and the conclusion is an isomorphism `M ≃[L] N`.
---
This documentation-only PR was split out from #41111 following review feedback.
Please note that ChatGPT Codex was used to help prepare this documentation-only PR. |
t-logic
new-contributor
|
3/3 |
Mathlib/ModelTheory/PartialEquiv.lean |
1 |
2 |
['github-actions'] |
nobody |
8-32879 8 days ago |
8-33468 8 days ago |
8-33118 8 days |
| 41111 |
erdkocak author:erdkocak |
feat(ModelTheory): add cardinal-generated substructure API |
This is the first PR in a sequence splitting #40561.
It adds a `CardinalLTGenerated` predicate for substructures, basic closure and map lemmas, and the finitely generated specialization.
Co-authored-by: Yağız Kaan Aydoğdu <y.kaan.aydogdu@gmail.com>
Co-authored-by: Yusuf Demir <yusufdemir12610@gmail.com>
Advised-by: Ayhan Günaydın <ayhan.gunaydin@bogazici.edu.tr>
Advised-by: Metin Ersin Arıcan <metin.arican@bogazici.edu.tr>
Please note that we utilized agentic AI tools (Claude Opus, ChatGPT Codex) during the development of this PR. Most of the proofs of the major theorems are direct translations from human-language source material (see the diff in `references.bib`) into Lean proofs using the mentioned AI tools. However, all design and formalization decisions were made by us. |
t-logic
new-contributor
LLM-generated
|
51/0 |
Mathlib/ModelTheory/FinitelyGenerated.lean,Mathlib/ModelTheory/Substructures.lean |
2 |
9 |
['NoahW314', 'erdkocak', 'felixpernegger', 'github-actions'] |
nobody |
8-32024 8 days ago |
8-32831 8 days ago |
14-30170 14 days |
| 41112 |
erdkocak author:erdkocak |
feat(ModelTheory): add elementary extension pairs |
- [ ] depends on: #41111
- [ ] depends on: #41358
The second dependency is a small documentation-only cleanup split out from the original stack, so that the downstream PRs do not carry that unrelated diff.
This is the second PR in a sequence splitting #40561.
It adds elementary extension-pair predicates and the partial-equivalence API used by the quantifier-elimination criterion.
Co-authored-by: Yağız Kaan Aydoğdu <y.kaan.aydogdu@gmail.com>
Co-authored-by: Yusuf Demir <yusufdemir12610@gmail.com>
Advised-by: Ayhan Günaydın <ayhan.gunaydin@bogazici.edu.tr>
Advised-by: Metin Ersin Arıcan <metin.arican@bogazici.edu.tr>
Please note that we utilized agentic AI tools (Claude Opus, ChatGPT Codex) during the development of this PR. Most of the proofs of the major theorems are direct translations from human-language source material (see the diff in `references.bib`) into Lean proofs using the mentioned AI tools. However, all design and formalization decisions were made by us. |
new-contributor
LLM-generated
blocked-by-other-PR
|
221/4 |
Mathlib.lean,Mathlib/ModelTheory/ElementaryExtensionPair.lean,Mathlib/ModelTheory/FinitelyGenerated.lean,Mathlib/ModelTheory/PartialEquiv.lean,Mathlib/ModelTheory/Substructures.lean,Mathlib/Tactic/Linter/TextBased/UnicodeLinter.lean |
6 |
4 |
['felixpernegger', 'github-actions', 'mathlib-dependent-issues'] |
nobody |
8-31876 8 days ago |
14-19877 14 days ago |
0-10614 2 hours |
| 41113 |
erdkocak author:erdkocak |
feat(ModelTheory): define quantifier elimination |
- [ ] depends on: #41112
This is the third PR in a sequence splitting #40561.
It defines quantifier-free equivalence over a theory and quantifier elimination, together with basic reduction lemmas.
Co-authored-by: Yağız Kaan Aydoğdu <y.kaan.aydogdu@gmail.com>
Co-authored-by: Yusuf Demir <yusufdemir12610@gmail.com>
Advised-by: Ayhan Günaydın <ayhan.gunaydin@bogazici.edu.tr>
Advised-by: Metin Ersin Arıcan <metin.arican@bogazici.edu.tr>
Please note that we utilized agentic AI tools (Claude Opus, ChatGPT Codex) during the development of this PR. Most of the proofs of the major theorems are direct translations from human-language source material (see the diff in `references.bib`) into Lean proofs using the mentioned AI tools. However, all design and formalization decisions were made by us. |
new-contributor
LLM-generated
blocked-by-other-PR
|
400/4 |
Mathlib.lean,Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/ElementaryExtensionPair.lean,Mathlib/ModelTheory/FinitelyGenerated.lean,Mathlib/ModelTheory/PartialEquiv.lean,Mathlib/ModelTheory/QuantifierElimination.lean,Mathlib/ModelTheory/Substructures.lean,Mathlib/Tactic/Linter/TextBased/UnicodeLinter.lean,docs/references.bib |
9 |
4 |
['felixpernegger', 'github-actions', 'mathlib-dependent-issues'] |
nobody |
8-31637 8 days ago |
14-19879 14 days ago |
0-10570 2 hours |
| 41114 |
erdkocak author:erdkocak |
feat(ModelTheory): add embedding criteria for quantifier elimination |
- [ ] depends on: #41113
This is the fourth PR in a sequence splitting #40561.
It adds embedding and realization criteria for quantifier elimination, including the Marker-style criterion.
Co-authored-by: Yağız Kaan Aydoğdu <y.kaan.aydogdu@gmail.com>
Co-authored-by: Yusuf Demir <yusufdemir12610@gmail.com>
Advised-by: Ayhan Günaydın <ayhan.gunaydin@bogazici.edu.tr>
Advised-by: Metin Ersin Arıcan <metin.arican@bogazici.edu.tr>
Please note that we utilized agentic AI tools (Claude Opus, ChatGPT Codex) during the development of this PR. Most of the proofs of the major theorems are direct translations from human-language source material (see the diff in `references.bib`) into Lean proofs using the mentioned AI tools. However, all design and formalization decisions were made by us. |
new-contributor
LLM-generated
blocked-by-other-PR
|
771/4 |
Mathlib.lean,Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/ElementaryExtensionPair.lean,Mathlib/ModelTheory/FinitelyGenerated.lean,Mathlib/ModelTheory/PartialEquiv.lean,Mathlib/ModelTheory/QuantifierElimination.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Substructures.lean,Mathlib/Tactic/Linter/TextBased/UnicodeLinter.lean,docs/references.bib |
10 |
4 |
['felixpernegger', 'github-actions', 'mathlib-dependent-issues'] |
nobody |
8-31566 8 days ago |
14-19880 14 days ago |
0-10598 2 hours |
| 41115 |
erdkocak author:erdkocak |
feat(ModelTheory): derive quantifier elimination from extension pairs |
- [ ] depends on: #41114
This is the fifth PR in a sequence splitting #40561.
It proves quantifier elimination from elementary extension-pair hypotheses, including finitely generated and cardinal-generated variants.
Co-authored-by: Yağız Kaan Aydoğdu <y.kaan.aydogdu@gmail.com>
Co-authored-by: Yusuf Demir <yusufdemir12610@gmail.com>
Advised-by: Ayhan Günaydın <ayhan.gunaydin@bogazici.edu.tr>
Advised-by: Metin Ersin Arıcan <metin.arican@bogazici.edu.tr>
Please note that we utilized agentic AI tools (Claude Opus, ChatGPT Codex) during the development of this PR. Most of the proofs of the major theorems are direct translations from human-language source material (see the diff in `references.bib`) into Lean proofs using the mentioned AI tools. However, all design and formalization decisions were made by us. |
new-contributor
LLM-generated
blocked-by-other-PR
|
955/4 |
Mathlib.lean,Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/ElementaryExtensionPair.lean,Mathlib/ModelTheory/FinitelyGenerated.lean,Mathlib/ModelTheory/PartialEquiv.lean,Mathlib/ModelTheory/QuantifierElimination.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Substructures.lean,Mathlib/Tactic/Linter/TextBased/UnicodeLinter.lean,docs/references.bib |
10 |
4 |
['felixpernegger', 'github-actions', 'mathlib-dependent-issues'] |
nobody |
8-31390 8 days ago |
14-19881 14 days ago |
0-10557 2 hours |
| 41116 |
erdkocak author:erdkocak |
feat(ModelTheory): prove quantifier elimination for dense linear orders |
- [ ] depends on: #41115
This is the final PR in a sequence splitting #40561.
It applies the extension-pair criterion to prove that dense linear orders have quantifier elimination.
Co-authored-by: Yağız Kaan Aydoğdu <y.kaan.aydogdu@gmail.com>
Co-authored-by: Yusuf Demir <yusufdemir12610@gmail.com>
Advised-by: Ayhan Günaydın <ayhan.gunaydin@bogazici.edu.tr>
Advised-by: Metin Ersin Arıcan <metin.arican@bogazici.edu.tr>
Please note that we utilized agentic AI tools (Claude Opus, ChatGPT Codex) during the development of this PR. Most of the proofs of the major theorems are direct translations from human-language source material (see the diff in `references.bib`) into Lean proofs using the mentioned AI tools. However, all design and formalization decisions were made by us. |
new-contributor
LLM-generated
blocked-by-other-PR
|
972/5 |
Mathlib.lean,Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/ElementaryExtensionPair.lean,Mathlib/ModelTheory/FinitelyGenerated.lean,Mathlib/ModelTheory/Order.lean,Mathlib/ModelTheory/PartialEquiv.lean,Mathlib/ModelTheory/QuantifierElimination.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Substructures.lean,Mathlib/Tactic/Linter/TextBased/UnicodeLinter.lean,docs/references.bib |
11 |
5 |
['felixpernegger', 'github-actions', 'mathlib-dependent-issues'] |
nobody |
8-31312 8 days ago |
14-19882 14 days ago |
0-10546 2 hours |
| 38014 |
cduenasnavarro author:cduenasnavarro |
feat(InformationTheory): linear codes over finite fields and minimum distance properties |
Define linear codes over a finite field `F` as finite-dimensional subspaces of `Fin n → F`,
together with their minimum Hamming distance.
Main definitions:
* `LinearCode`
* `minDist`
* `LinearCodeWithDist`
* `hammingSphere`
Main results:
* `minDist_eq_sInf_pairwiseDist`: characterisation of the minimum distance via pairwise distances
* `disjoint_spheres`: Hamming spheres of radius `t` around distinct codewords are disjoint
if `2 * t < d`
Pending:
* Choosing an adequate book reference
---
<!-- Your PR title will become the first line of the commit message.
In this box, the text above the `---` (if not empty) will be appended
to the commit message, and can be used to give additional context or
details. Please leave a blank newline before the `---`, otherwise GitHub
will format the text above it as a title.
For details on the "pull request lifecycle" in mathlib, please see:
https://leanprover-community.github.io/contribute/index.html
In particular, note that most reviewers will only notice your PR
if it passes the continuous integration checks.
Please ask for help on https://leanprover.zulipchat.com if needed.
When merging, all the commits will be squashed into a single commit
listing all co-authors.
Co-authors in the squash commit are gathered from two sources:
First, all authors of commits to this PR branch are included. Thus,
one way to add co-authors is to include at least one commit authored by
each co-author among the commits in the pull request. If necessary, you
may create empty commits to indicate co-authorship, using commands like so:
git commit --author="Author Name <author@email.com>" --allow-empty -m "add Author Name as coauthor"
Second, co-authors can also be listed in lines at the very bottom of
the commit message (that is, directly before the `---`) using the following format:
Co-authored-by: Author Name <author@email.com>
If you are moving or deleting declarations, please include these lines
at the bottom of the commit message (before the `---`, and also before
any "Co-authored-by" lines) using the following format:
Moves:
- Vector.* -> List.Vector.*
- ...
Deletions:
- Nat.bit1_add_bit1
- ...
Any other comments you want to keep out of the PR commit should go
below the `---`, and placed outside this HTML comment, or else they
will be invisible to reviewers.
If this PR depends on other PRs, please list them below this comment,
using the following format:
- [ ] depends on: #abc [optional extra text]
- [ ] depends on: #xyz [optional extra text]
-->
[](https://gitpod.io/from-referrer/)
|
t-measure-probability
new-contributor
awaiting-author
|
179/0 |
Mathlib.lean,Mathlib/InformationTheory/Coding/LinearCode.lean |
2 |
50 |
['SnirBroshi', 'YaelDillies', 'cduenasnavarro', 'github-actions', 'rkirov', 'vihdzp', 'wrenna-robson', 'wwylele'] |
YaelDillies assignee:YaelDillies |
8-7289 8 days ago |
28-34369 28 days ago |
61-47429 61 days |
| 40824 |
alejandro-soto-franco author:alejandro-soto-franco |
feat(Analysis/FunctionalSpaces): the one-dimensional Poincaré inequality |
Adds the one-dimensional Poincaré inequality `MeasureTheory.poincare_1d`: for
`f : ℝ → E` continuous on `[a, b]`, continuously differentiable on `(a, b)`, with
`f a = 0`,
```
∫⁻ x in Icc a b, ‖f x‖ₑ ^ 2 ≤ ENNReal.ofReal ((b - a) ^ 2) * ∫⁻ x in Icc a b, ‖deriv f x‖ₑ ^ 2.
```
The statement uses lower Lebesgue integrals of extended norms, so no integrability
hypothesis on the derivative is needed (the bound is automatic when the right-hand
side is infinite), and it holds for an arbitrary normed space `E`. The general
(not necessarily complete) `E` is handled by `wlog … : CompleteSpace E generalizing E`
together with the completion-embedding idiom, as in
`Mathlib/MeasureTheory/Integral/IntervalIntegral/DistLEIntegral.lean`.
Also adds the supporting `ENNReal.lintegral_sq_le_measure_mul_lintegral_sq`
(Cauchy–Schwarz for the lower Lebesgue integral against the constant `1`, the
`p = q = 2` case of Hölder) to `MeanInequalities.lean`.
This is the base case for an n-dimensional convex-domain version (Fubini over
coordinate slices), planned as a follow-up. The statement form (extended-norm
Lebesgue integrals, arbitrary normed space) follows [discussion with Sébastien
Gouëzel on Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/1D.20Poincar.C3.A9.20inequality).
---
AI assistance: this contribution was developed with the help of Claude Code Opus 4.8; the proof was
drafted and iteratively refined against the Lean compiler, then reviewed by me.
|
t-measure-probability
new-contributor
LLM-generated
awaiting-author
|
678/18 |
Mathlib.lean,Mathlib/Analysis/FunctionalSpaces/PoincareInequality.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/ContDiff.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean |
4 |
22 |
['alejandro-soto-franco', 'eric-wieser', 'github-actions', 'sgouezel'] |
sgouezel assignee:sgouezel |
7-76358 7 days ago |
12-403 12 days ago |
10-77358 10 days |
| 39864 |
8e7 author:8e7 |
feat(Combinatorics/SimpleGraph/Acyclic): helly property on subtrees |
This PR adds several lemmas regarding connected subsets of vertices in trees (subtrees). The main result is the Helly property for subtrees: For a finite set of subtrees, if any pair of subtrees intersect, then there is a common vertex in all subtrees.
This lemma is part of an effort to formalize tree decompositions (see #38334), and will be used in a future PR to prove `G.cliqueNum - 1 <= G.treeWidth`.
AI Usage: The proofs were developed with the help of Claude Code. I vouch for all the code written and understand the content fully.
---
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|
t-combinatorics
new-contributor
LLM-generated
|
114/0 |
Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Subgraph.lean |
2 |
3 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
7-53045 7 days ago |
7-53600 7 days ago |
25-67423 25 days |
| Number |
Author |
Title |
Description |
Labels |
+/- |
Modified files (first 100) |
📝 |
💬 |
All users who commented or reviewed |
Assignee(s) |
Approval(s) |
Updated |
Last status change |
total time in review |
| 12608 |
eric-wieser author:eric-wieser |
feat: allow `nsmul` / `zsmul` to be omitted again, with a warning |
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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|
merge-conflict
awaiting-author
t-algebra
t-meta
label:t-algebra$ |
118/2 |
Mathlib.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Tactic.lean,Mathlib/Tactic/DefaultFieldLinter.lean,scripts/noshake.json,test/default_field_linter.lean |
6 |
12 |
['YaelDillies', 'eric-wieser', 'fpvandoorn', 'github-actions'] |
nobody |
1 |
711-37059 1 year ago |
784-83446 784 days ago |
5-72493 5 days |
| 8519 |
eric-wieser author:eric-wieser |
refactor(LinearAlgebra/TensorProduct): golf using `liftAddHom` |
This new `TensorProduct.liftAddHom` doesn't require bilinearity, only that scalar multiplication can be moved between the arguments.
While in theory we only need the `AddMonoidHom` version as it offers exactly the same generality, we first provide an unbundled `liftFun` as this seems to give a sizeable performance boost if used in downstream `lift` variants.
---
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- [x] depends on: #8584
[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-algebra
label:t-algebra$ |
53/50 |
Mathlib/Algebra/Category/AlgebraCat/Monoidal.lean,Mathlib/LinearAlgebra/TensorProduct.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean |
3 |
28 |
['bustercopley', 'eric-wieser', 'jcommelin', 'jjaassoonn', 'leanprover-bot', 'mathlib-bors'] |
nobody |
1 |
711-37056 1 year ago |
951-2419 951 days ago |
5-6524 5 days |
| 9146 |
laughinggas author:laughinggas |
feat(Data/ZMod/Defs): Topological structure on `ZMod` |
Added a discrete topology structure to `ZMod n` for all `n`
---
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|
merge-conflict
t-algebra
awaiting-author
t-topology
label:t-algebra$ |
55/3 |
Mathlib.lean,Mathlib/Topology/Algebra/Constructions.lean,Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Instances/ZMod.lean,Mathlib/Topology/Maps.lean |
5 |
61 |
['YaelDillies', 'eric-wieser', 'github-actions', 'jcommelin', 'laughinggas', 'mo271', 'urkud'] |
nobody |
1 |
711-37056 1 year ago |
917-81547 917 days ago |
7-11053 7 days |
| 12751 |
Command-Master author:Command-Master |
feat: add lemmas for Nat/Bits, Nat/Bitwise and Nat/Size |
Remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-data
new-contributor
|
66/7 |
Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Nat/Size.lean |
4 |
26 |
['Command-Master', 'Rida-Hamadani', 'Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'jcommelin'] |
nobody |
1 |
692-14356 1 year ago |
727-20578 727 days ago |
56-40668 56 days |
| 15448 |
urkud author:urkud |
chore(*): deprecate `Option.elim'` |
Use `Option.elim` instead.
---
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[](https://gitpod.io/from-referrer/) |
merge-conflict
awaiting-author
tech debt
|
54/50 |
Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/Calculus/LagrangeMultipliers.lean,Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/Computability/TMToPartrec.lean,Mathlib/Data/Option/Defs.lean,Mathlib/LinearAlgebra/Basis.lean,Mathlib/Logic/Embedding/Set.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/MeasureTheory/OuterMeasure/Induced.lean,Mathlib/NumberTheory/Dioph.lean,Mathlib/Topology/Compactness/Paracompact.lean,Mathlib/Topology/LocallyFinite.lean |
17 |
12 |
['Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'grunweg', 'urkud'] |
nobody |
1 |
692-3409 1 year ago |
701-49571 701 days ago |
7-18420 7 days |
| 13514 |
madvorak author:madvorak |
feat(Computability/ContextFreeGrammar): closure under union |
- [ ] depends on: #15895
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-computability
blocked-by-other-PR
|
448/4 |
Mathlib/Computability/ContextFreeGrammar.lean |
1 |
50 |
['Rida-Hamadani', 'YaelDillies', 'github-actions', 'madvorak'] |
nobody |
1 |
617-30213 1 year ago |
695-4194 695 days ago |
72-28417 72 days |
| 12133 |
ADedecker author:ADedecker |
feat: generalize instIsLowerProd to arbitrary products |
Also change a bit the proof of the product case to match my own taste, feel free to tell if you prefer the old one.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-topology
t-order
|
34/14 |
Mathlib/Topology/Constructions.lean,Mathlib/Topology/Order/LowerUpperTopology.lean |
2 |
13 |
['Ruben-VandeVelde', 'TwoFX', 'github-actions', 'jcommelin', 'mans0954', 'mathlib-bors', 'riccardobrasca'] |
nobody |
2 |
604-36261 1 year ago |
755-31897 755 days ago |
63-69226 63 days |
| 18461 |
hannahfechtner author:hannahfechtner |
feat: left and right common multiples mixins |
add mixins for left and right common multiples. These carry the data of what factors are used to create the common multiples
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-algebra
new-contributor
label:t-algebra$ |
78/0 |
Mathlib/Algebra/Group/Defs.lean |
1 |
13 |
['github-actions', 'hannahfechtner', 'jcommelin', 'kbuzzard', 'kim-em', 'trivial1711'] |
nobody |
1 |
538-32728 1 year ago |
538-32728 538 days ago |
69-35596 69 days |
| 2605 |
eric-wieser author:eric-wieser |
chore: better error message in linarith |
On this mwe:
```lean
import Mathlib.Tactic.Linarith
example (s : Set ℕ) (h : s = s) : 0 ≤ 1 :=
by linarith
```
this now indicates where the internal error is coming from.
Is there a better way of chaining errors than this?
---
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|
merge-conflict
awaiting-author
t-meta
|
12/1 |
Mathlib/Tactic/Linarith/Preprocessing.lean |
1 |
3 |
['Vierkantor', 'harahu', 'kim-em', 'mo271'] |
nobody |
1 |
528-14748 1 year ago |
1175-46287 1175 days ago |
51-42225 51 days |
| 19425 |
hrmacbeth author:hrmacbeth |
perf: gcongr forward-reasoning adjustment |
This PR changes the "forward-reasoning" component of `gcongr`, rendering it more efficient, particularly in problems with a large number of variables/hypotheses in the context.
Previously `gcongr` attempted to match *every* `LocalDecl` against *every* node in the parse tree using *each* of the five implemented `@[gcongr_forward]` mini-tactics: matching directly, matching after applying `symm`, matching after applying `le_of_lt`, etc etc.
The new algorithm filters out the non-Prop `LocalDecl`s, and also adjusts the `@[gcongr_forward]` extensions so that, rather than re-apply the relevant lemmas (`symm`, `le_of_lt`, etc) at every node in the parse tree, the lemmas are applied in advance to the `LocalDecl`s and the result (if successful) stored.
The performance effect on mathlib as a whole is miniscule, but it speeds up the profiler's count of "tactic execution of Mathlib.Tactic.GCongr" in the newly-added test from 257 ms to 47 ms, and has a similar effect on real-life examples in an analysis project of mine.
Co-authored-by: Mario Carneiro <di.gama@gmail.com>
---
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[](https://gitpod.io/from-referrer/)
(Note that Mario provided the ideas but not the code, so please review with appropriate diligence!) |
merge-conflict
awaiting-author
|
130/59 |
Mathlib/Order/Lattice.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/GCongr/ForwardAttr.lean,MathlibTest/GCongr/inequalities.lean |
4 |
17 |
['Vierkantor', 'github-actions', 'hrmacbeth', 'leanprover-bot', 'leanprover-community-bot-assistant'] |
Vierkantor assignee:Vierkantor |
1 |
458-31110 1 year ago |
591-19527 591 days ago |
1-41769 1 day |
| 19315 |
quangvdao author:quangvdao |
feat(Data/Finsupp/Fin): Add `Finsupp` operations on `Fin` tuple |
This PR adds more analogues of operations on `Fin` tuples to the `Finsupp` setting. Before, there were only `Finsupp.cons` and `Finsupp.tail`. Now there are also `Finsupp.snoc`, `Finsupp.insertNth`, `Finsupp.init`, and `Finsupp.removeNth`. These all come with supporting lemmas.
I also removed the porting comment about `succAboveCases` in `Data/Fin/Basic`, and added a lemma about `succAbove` in `Data/Fin/Tuple/Basic`.
---
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- [x] depends on: #20361
- [x] depends on: #20771
- [x] depends on: #20770
[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-data
|
193/16 |
Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Data/Finsupp/Fin.lean,Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,scripts/nolints_prime_decls.txt |
6 |
44 |
['YaelDillies', 'github-actions', 'j-loreaux', 'kbuzzard', 'mathlib4-dependent-issues-bot', 'quangvdao'] |
nobody |
1 |
431-74115 1 year ago |
509-12738 509 days ago |
43-80700 43 days |
| 21276 |
GabinKolly author:GabinKolly |
feat(ModelTheory/Substructures): define equivalences between equal substructures |
Define first-order equivalences between equal substructures, and prove related properties.
---
This is some preparatory work for #18876
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[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-logic
|
62/0 |
Mathlib/ModelTheory/Substructures.lean |
1 |
19 |
['GabinKolly', 'YaelDillies', 'fpvandoorn', 'github-actions', 'grunweg'] |
nobody |
1 |
429-5789 1 year ago |
429-5789 429 days ago |
46-55730 46 days |
| 25401 |
digama0 author:digama0 |
feat(Util): SuppressSorry option |
See also leanprover/lean4#8611 and [#lean4 > Silent sorry @ 💬](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/Silent.20sorry/near/503537964). This is a stop-gap solution while leanprover/lean4#8611 is underway, but it works about as well as any other built in option. Hooking declaration elaborators turns out to be a very powerful technique.
---
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|
merge-conflict
t-meta
|
342/0 |
Mathlib.lean,Mathlib/Util/CommandElabHook.lean,Mathlib/Util/SuppressSorry.lean,MathlibTest/suppressSorry.lean |
4 |
15 |
['digama0', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] |
alexjbest assignee:alexjbest |
1 |
332-68577 10 months ago |
332-68577 332 days ago |
71-28496 71 days |
| 26462 |
PSchwahn author:PSchwahn |
feat(LinearAlgebra/Projection): add results about inverse of `Submodule.prodEquivOfIsCompl` |
Add two theorems `Submodule.prodEquivOfIsCompl_symm_apply` and `Submodule.prodEquivOfIsCompl_symm_add`, which are API for `Submodule.prodEquivOfIsCompl`.
We believe these theorems are useful; for example, we have used their statements in a [classification formalization project](https://github.com/LieLean/LowDimSolvClassification).
Co-authored by:
- [Viviana del Barco](https://github.com/vdelbarc)
- [Gustavo Infanti](https://github.com/GuQOliveira)
- [Exequiel Rivas](https://github.com/erivas)
---
I am not sure whether the `prodEquivOfIsCompl_symm_apply` theorem should be tagged with `@[simp]`; this might lead to confluence issues. Opinions are welcome!
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|
awaiting-author
t-algebra
new-contributor
label:t-algebra$ |
10/0 |
Mathlib/LinearAlgebra/Projection.lean |
1 |
7 |
['PSchwahn', 'github-actions', 'joelriou', 'kckennylau'] |
joelriou assignee:joelriou |
1 |
306-67180 10 months ago |
307-11883 307 days ago |
73-43082 73 days |
| 27937 |
madvorak author:madvorak |
feat(Logic/Basic): `congr_heq₂` |
---
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|
awaiting-author
t-logic
|
6/0 |
Mathlib/Logic/Basic.lean |
1 |
8 |
['YaelDillies', 'fpvandoorn', 'github-actions', 'madvorak', 'vihdzp'] |
fpvandoorn assignee:fpvandoorn |
1 |
298-31119 9 months ago |
324-31904 324 days ago |
17-62721 17 days |
| 21950 |
erdOne author:erdOne |
feat(NumberTheory/Padics): the completion of `ℚ` at a finite place is `ℚ_[p]` |
---
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|
merge-conflict
t-number-theory
|
253/1 |
Mathlib.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/NumberTheory/Padics/HeightOneSpectrum.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/WithZeroMulInt.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean |
7 |
33 |
['Ruben-VandeVelde', 'erdOne', 'faenuccio', 'github-actions', 'leanprover-community-bot-assistant', 'pechersky', 'smmercuri', 'xroblot'] |
nobody |
1 |
289-14633 9 months ago |
370-14570 370 days ago |
73-10883 73 days |
| 26330 |
Timeroot author:Timeroot |
feat: "Junk value" test file |
This PR continues the work from #25173.
Original PR: https://github.com/leanprover-community/mathlib4/pull/25173 |
awaiting-author
t-data
|
360/0 |
MathlibTest/Junk.lean |
1 |
17 |
['SnirBroshi', 'Timeroot', 'bryangingechen', 'github-actions', 'leanprover-community-bot-assistant', 'madvorak', 'pechersky', 'vihdzp'] |
pechersky assignee:pechersky |
2 |
285-58360 9 months ago |
285-58360 285 days ago |
48-73998 48 days |
| 27302 |
tristan-f-r author:tristan-f-r |
feat(Fintype/Quotient): finLiftOn₂ |
The combination of [`Quotient.finLiftOn`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Fintype/Quotient.html#Quotient.finLiftOn) and [`liftOn₂`](https://leanprover-community.github.io/mathlib4_docs/Init/Core.html#Quotient.liftOn%E2%82%82).
---
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[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-data
|
19/0 |
Mathlib/Data/Fintype/Quotient.lean |
1 |
12 |
['github-actions', 'kckennylau', 'pechersky', 'tristan-f-r', 'vihdzp'] |
pechersky assignee:pechersky |
2 |
269-49120 8 months ago |
269-49120 269 days ago |
6-6533 6 days |
| 28925 |
grunweg author:grunweg |
chore: remove `linear_combination'` tactic |
When `linear_combination` was refactored in #15899, the old code was kept as the `linear_combination'` tactic, for easier migration. The consensus of the zulip discussion ([#mathlib4 > Narrowing the scope of `linear_combination` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Narrowing.20the.20scope.20of.20.60linear_combination.60/near/470237816)) was to wait, and "revisit this once people have experienced the various tactics in practice".
One year later, the old tactic has almost no uses: it is unused in mathlib; [searching on github](https://github.com/search?q=linear_combination%27%20path%3A*.lean&type=code) yields 37 hits --- all of which are in various forks of mathlib. Thus, removing this tactic seems appropriate.
---
Do not merge before the zulip discussion has concluded!
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|
merge-conflict
file-removed
awaiting-zulip
|
0/564 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/LinearCombination'.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,MathlibTest/linear_combination'.lean |
5 |
4 |
['euprunin', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] |
nobody |
1 |
269-44196 8 months ago |
320-75993 320 days ago |
0-1 1 second |
| 28737 |
astrainfinita author:astrainfinita |
refactor: deprecate `MulEquivClass` |
This PR continues the work from #18806.
Original PR: https://github.com/leanprover-community/mathlib4/pull/18806 |
merge-conflict
awaiting-author
t-algebra
label:t-algebra$ |
67/77 |
Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Algebra/Group/Irreducible/Lemmas.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/Units/Equiv.lean,Mathlib/Algebra/GroupWithZero/Equiv.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Prime/Lemmas.lean,Mathlib/Algebra/Ring/Divisibility/Basic.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/Star/MonoidHom.lean,Mathlib/Combinatorics/Additive/FreimanHom.lean,Mathlib/GroupTheory/GroupExtension/Defs.lean,Mathlib/GroupTheory/Submonoid/Center.lean,Mathlib/LinearAlgebra/FreeModule/Finite/CardQuotient.lean,Mathlib/RingTheory/Bialgebra/Equiv.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/RingTheory/UniqueFactorizationDomain/NormalizedFactors.lean,Mathlib/Topology/Algebra/ContinuousMonoidHom.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean |
26 |
20 |
['Vierkantor', 'alreadydone', 'astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] |
Vierkantor assignee:Vierkantor |
1 |
257-34678 8 months ago |
320-81251 320 days ago |
2-31233 2 days |
| 9352 |
chenyili0818 author:chenyili0818 |
feat: arithmetic lemmas for `gradient` |
This file is based on Mathlib.Analysis.Calculus.Gradient.Basic, and describes the calculation properties
Co-authored-by: Ziyu Wang [tropicalfish910@gmail.com](mailto:tropicalfish910@gmail.com)
---
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|
merge-conflict
awaiting-author
t-analysis
|
404/0 |
Mathlib.lean,Mathlib/Analysis/Calculus/Gradient/Lemmas.lean |
2 |
31 |
['chenyili0818', 'github-actions', 'jcommelin', 'mathlib4-merge-conflict-bot', 'sgouezel', 'winstonyin'] |
nobody |
1 |
235-39772 7 months ago |
873-18221 873 days ago |
52-1358 52 days |
| 11890 |
adomani author:adomani |
feat: the terminal refine linter |
A linter that warns on usages of `refine` and `refine'` as a finishing tactic.
See this [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Usage.20of.20refine').
### Conclusion of the experiment
Systematic replacements of terminal `refine` with `exact` leads to an overall slow-down.
---
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- [ ] depends on: #15616 (disable the linter in downstream projects)
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-linter
awaiting-author
|
77/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/TerminalRefineLinter.lean |
3 |
15 |
['adomani', 'github-actions', 'grunweg', 'joneugster', 'leanprover-bot', 'mathlib4-merge-conflict-bot', 'urkud'] |
nobody |
1 |
235-39641 7 months ago |
697-74147 697 days ago |
18-28993 18 days |
| 20924 |
tomaz1502 author:tomaz1502 |
feat(Computability/QueryComplexity): Oracle-based computation |
This PR adds the types and lemmas for oracle-based computation. In this model, computations are run on a monad which also counts the number of oracle queries executed. With it, it becomes possible to reason about the upper bound of the query complexity of algorithms. In the future, we could extend this work to include the necessary bits from information theory and probability to also reason about lower bounds on query complexity, like the work in https://github.com/girving/debate.
Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2318629.20runtime.20complexity.20of.20sorting.20a.20list
Co-authored-by: Geoffrey Irving <irving@naml.us>
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-computability
|
305/0 |
Mathlib.lean,Mathlib/Computability/QueryComplexity/Basic.lean,Mathlib/Computability/QueryComplexity/Defs.lean |
3 |
60 |
['eric-wieser', 'girving', 'github-actions', 'mathlib4-merge-conflict-bot', 'quangvdao', 'tomaz1502'] |
nobody |
1 |
235-39207 7 months ago |
504-60511 504 days ago |
27-32632 27 days |
| 21624 |
sinhp author:sinhp |
feat(CategoryTheory): The (closed) monoidal structure on the product category of families of (closed) monoidal categories |
Given a family of closed monoidal categories, we show that the product of these categories
is a closed monoidal category with the pointwise monoidal structure.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-category-theory
|
144/0 |
Mathlib.lean,Mathlib/CategoryTheory/Pi/Basic.lean,Mathlib/CategoryTheory/Pi/Monoidal.lean,Mathlib/CategoryTheory/Pi/MonoidalClosed.lean |
4 |
20 |
['TwoFX', 'YaelDillies', 'b-mehta', 'github-actions', 'jcommelin', 'mathlib4-merge-conflict-bot', 'sinhp'] |
nobody |
1 |
235-39197 7 months ago |
460-53439 460 days ago |
50-48872 50 days |
| 22159 |
shetzl author:shetzl |
feat: add definition of pushdown automata |
Add the definition of pushdown automata and their two acceptance conditions: acceptance based on empty stack and acceptance based on final state.
Co-authored-by: Tobias Leichtfried <tobias.leichtfried@tuwien.ac.at>
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-computability
awaiting-author
new-contributor
|
70/0 |
Mathlib.lean,Mathlib/Computability/PDA.lean |
2 |
35 |
['YaelDillies', 'github-actions', 'madvorak', 'mathlib4-merge-conflict-bot', 'shetzl'] |
nobody |
1 |
235-39065 7 months ago |
482-33078 482 days ago |
20-81248 20 days |
| 22919 |
plp127 author:plp127 |
feat(Data/Fintype/Pi): Make `Fintype` instance for `RelHom`s computable |
Makes the `Fintype` instance for rel homs computable.
See this [Zulip](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Classical.20vs.20constructive.20logic.20in.20computation/near/496220816) message.
---
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|
merge-conflict
awaiting-author
t-data
|
178/44 |
Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Coloring.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Data/Fintype/CardEmbedding.lean,Mathlib/Data/Fintype/Pi.lean |
5 |
31 |
['IvanRenison', 'b-mehta', 'eric-wieser', 'fpvandoorn', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'plp127'] |
b-mehta assignee:b-mehta |
1 |
235-39039 7 months ago |
409-52310 409 days ago |
71-41735 71 days |
| 26914 |
quangvdao author:quangvdao |
feat(Data/PFunctor/Univariate): more definitions for univariate `PFunctor` |
This PR defines several basic definitions of `PFunctor`, including zero, one, constants, monomials, coproduct (sum), product, sigma, pi, tensor product, universe lifting, and equivalence.
We also add: (1) simple lemmas connecting the basic definitions, (2) an automatically derived ext lemma for `PFunctor` via `@[ext]` attribute
Some things I'm not clear on:
- I define `HAdd` and `HMul` instances for coproduct and product of poly functors having different universe levels. Should I also define `Add` and `Mul` instances for poly functors having the same universe level?
- Is it ok to define notation for tensor product, i.e. `@[inherit_doc] scoped infixr:80 " ⊗ " => tensor`? I'm worried it might clash with other notation.
- Need a double-check on the priority of notation.
Some future definitions to add:
- Various equivalences arising from arithmetic identities, e.g., `P + 0 ≃ₚ P`.
- Definitions of Lenses and Charts (each of them will be a file or even a folder)
- Exponential objects (corresponding to both `prod` and `tensor`)
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merge-conflict
t-data
|
144/5 |
Mathlib/Data/PFunctor/Univariate/Basic.lean |
1 |
20 |
['alexkeizer', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'quangvdao'] |
eric-wieser assignee:eric-wieser |
1 |
235-38355 7 months ago |
235-38356 235 days ago |
133-24576 133 days |
| 27163 |
pechersky author:pechersky |
feat(Topology/ValuativeRel): of and to basis of compatible valuations |
---
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- [x] depends on: #30262 |
t-number-theory
t-algebra
merge-conflict
awaiting-author
t-topology
label:t-algebra$ |
229/62 |
Mathlib/NumberTheory/LocalField/Basic.lean,Mathlib/Order/Filter/Bases/Basic.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean |
3 |
73 |
['erdOne', 'github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky', 'smmercuri'] |
alreadydone assignee:alreadydone |
1 |
235-38338 7 months ago |
236-70129 236 days ago |
85-75885 85 days |
| 28325 |
pechersky author:pechersky |
feat(WithZeroTopology): `locallyCompactSpace_iff_locallyFiniteOrder_units` |
On the way to golf/generalize the proof that
locally compact valued fields have locally finite valuation groups as embodied in
`Valued.integer.locallyFiniteOrder_units_mrange_of_isCompact_integer` ]
---
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|
merge-conflict
t-topology
t-order
large-import
|
81/2 |
Mathlib/Topology/Algebra/GroupWithZero.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean,Mathlib/Topology/Compactness/Compact.lean |
3 |
13 |
['erdOne', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'ocfnash'] |
PatrickMassot assignee:PatrickMassot |
1 |
235-38043 7 months ago |
240-1926 240 days ago |
93-44257 93 days |
| 28871 |
JaafarTanoukhi author:JaafarTanoukhi |
feat(Combinatorics/Digraph): Tournaments |
Define orientations and tournaments. Related to #26771.
Co-authored-by: Rida Hamadani <mridahamadani@gmail.com>
---
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|
merge-conflict
t-combinatorics
new-contributor
|
62/0 |
Mathlib.lean,Mathlib/Combinatorics/Digraph/Orientation.lean,Mathlib/Combinatorics/Digraph/Tournament.lean |
3 |
6 |
['JaafarTanoukhi', 'Rida-Hamadani', 'SnirBroshi', 'github-actions', 'mathlib4-merge-conflict-bot'] |
kmill assignee:kmill |
1 |
235-37897 7 months ago |
235-37898 235 days ago |
71-37436 71 days |
| 11800 |
JADekker author:JADekker |
feat: KappaLindelöf spaces |
Define KappaLindelöf spaces by following the first one-third of the API for Lindelöf spaces. The remainder will be added in a future PR.
---
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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 |
1 |
235-11077 7 months ago |
710-31359 710 days ago |
123-25636 123 days |
| 26310 |
kckennylau author:kckennylau |
feat: binary forms |
This PR provides the basic definition of binary forms, which are homogeneous polynomials in two variables.
---
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- [ ] depends on: #26312
- [ ] depends on: #26313
- [ ] depends on: #26314
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|
merge-conflict
awaiting-author
t-algebra
label:t-algebra$ |
73/0 |
Mathlib.lean,Mathlib/RingTheory/MvPolynomial/BinaryForm.lean |
2 |
14 |
['MichaelStollBayreuth', 'github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'ocfnash'] |
ocfnash assignee:ocfnash |
1 |
235-10489 7 months ago |
327-7510 327 days ago |
7-9588 7 days |
| 24514 |
b-mehta author:b-mehta |
chore(Int/GCD): use fuel in xgcd |
Modify the definition of xgcd to use fuel recursion, to allow it to be reduced in the kernel. As a consequence, this means the evaluation of field operations in ZMod p become provable by `rfl` and `decide`.
Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/opaque.20recursion.20definitions.20break.20mergeSort.20decidability
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|
awaiting-author
t-data
merge-conflict
|
44/22 |
Mathlib/Data/Int/GCD.lean |
1 |
6 |
['astrainfinita', 'b-mehta', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'nomeata', 'urkud'] |
nobody |
1 |
227-26297 7 months ago |
378-66175 378 days ago |
58-34020 58 days |
| 28057 |
plp127 author:plp127 |
feat(SuccOrder): simp lemma to refold `Order.succ` and `Order.pred` |
Adds `SuccOrder.succ_eq_succ` and `PredOrder.pred_eq_pred` to refold `SuccOrder.succ` and `PredOrder.pred` into `Order.succ` and `Order.pred`. These lemmas are marked `@[simp]`.
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awaiting-author
t-order
merge-conflict
|
8/2 |
Mathlib/Order/SuccPred/Basic.lean |
1 |
4 |
['YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] |
bryangingechen assignee:bryangingechen |
1 |
218-59426 7 months ago |
295-75134 295 days ago |
44-10271 44 days |
| 26912 |
pechersky author:pechersky |
chore(Algebra/Ring/Subring): simp tag `Subring.smul_def` |
s-multiplying by a subtype is easiest to manipulate when both terms are in the ambient type. Many places that had to use the _def lemma for a rewrite, or to include it in a simp set, no longer have to.
Ported from #25308
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I found this being not-simp frustrating when talking about submodules over a valuation subring. |
merge-conflict
t-algebra
label:t-algebra$ |
67/66 |
Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/MulAction.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/LocalizedModule/Exact.lean,Mathlib/Algebra/Module/LocalizedModule/IsLocalization.lean,Mathlib/Algebra/Module/LocalizedModule/Submodule.lean,Mathlib/Algebra/Ring/Periodic.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfFixingSubgroup.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfStabilizer.lean,Mathlib/LinearAlgebra/RootSystem/Irreducible.lean,Mathlib/LinearAlgebra/RootSystem/WeylGroup.lean,Mathlib/RingTheory/Etale/Kaehler.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/LocalProperties/Projective.lean,Mathlib/RingTheory/Localization/InvSubmonoid.lean,Mathlib/RingTheory/OreLocalization/Basic.lean |
25 |
26 |
['artie2000', 'eric-wieser', 'github-actions', 'j-loreaux', 'kckennylau', 'leanprover-bot', 'leanprover-radar', 'mathlib4-merge-conflict-bot', 'pechersky', 'wrenna-robson'] |
joelriou assignee:joelriou |
1 |
208-70062 6 months ago |
230-19611 230 days ago |
60-67125 60 days |
| 33381 |
urkud author:urkud |
feat: add a version of the Schwarz lemma |
Add a version of the Schwarz lemma that is midway between the original lemma
and Pick's version.
Use it to show that a function that is separately holomorphic on a polydisc
and is bounded on this polydisc must be continuous on it.
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t-analysis
blocked-by-other-PR
merge-conflict
|
475/91 |
Mathlib.lean,Mathlib/Analysis/Complex/Schwarz.lean,Mathlib/Analysis/Complex/UnitDisc/Basic.lean,Mathlib/Analysis/Complex/UnitDisc/Schwarz.lean,Mathlib/Analysis/Complex/UnitDisc/Shift.lean |
5 |
22 |
['girving', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'urkud'] |
nobody |
1 |
193-46468 6 months ago |
195-14948 195 days ago |
0-947 15 minutes |
| 17176 |
arulandu author:arulandu |
feat: integrals and integrability with .re |
Lemmas for swapping order of .re and integration/integrability.
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|
merge-conflict
awaiting-author
new-contributor
t-measure-probability
please-adopt
|
49/0 |
Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean |
4 |
32 |
['EtienneC30', 'arulandu', 'github-actions', 'loefflerd'] |
nobody |
1 |
187-81042 6 months ago |
635-41879 635 days ago |
9-73631 9 days |
| 25905 |
mans0954 author:mans0954 |
feat(RingTheory/Polynomial/SmallDegreeVieta): polynomial versions of results in Algebra.QuadraticDiscriminant |
This PR continues the work from #25605.
Original PR: https://github.com/leanprover-community/mathlib4/pull/25605 |
merge-conflict
t-ring-theory
please-adopt
|
77/8 |
Mathlib/Algebra/Polynomial/Coeff.lean,Mathlib/RingTheory/Polynomial/SmallDegreeVieta.lean |
2 |
47 |
['chrisflav', 'github-actions', 'kckennylau', 'mans0954', 'mathlib4-merge-conflict-bot', 'ocfnash'] |
chrisflav assignee:chrisflav |
1 |
182-69935 6 months ago |
309-11914 309 days ago |
82-6504 82 days |
| 12934 |
grunweg author:grunweg |
chore: replace more uses of > or ≥ by < or ≤ |
These were flagged by the linter in https://github.com/leanprover-community/mathlib4/pull/12879: it is easy to simple avoid > or ≥ in hypotheses or haves.
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merge-conflict
awaiting-author
help-wanted
|
41/42 |
Archive/Imo/Imo1962Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2019Q4.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib/Tactic/Linarith/Datatypes.lean,test/cancel_denoms.lean,test/congr.lean,test/interval_cases.lean,test/observe.lean |
15 |
12 |
['YaelDillies', 'adomani', 'github-actions', 'grunweg', 'jcommelin', 'urkud'] |
nobody |
1 |
181-51350 6 months ago |
786-20775 786 days ago |
1-73101 1 day |
| 29610 |
llllvvuu author:llllvvuu |
feat(LinearAlgebra): define LinearMap.Eigenbasis |
Some theorems are left TODO for follow-up work.
The definition is from @eric-wieser ([#Is there code for X? > diagonalizable linear maps @ 💬](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/diagonalizable.20linear.20maps/near/539163222)).
Co-authored-by: Aristotle Harmonic <aristotle-harmonic@harmonic.fun>
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|
merge-conflict
t-algebra
awaiting-author
label:t-algebra$ |
455/5 |
Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Spectrum.lean,Mathlib/LinearAlgebra/Eigenbasis.lean,Mathlib/LinearAlgebra/FreeModule/PID.lean,Mathlib/Order/CompleteLattice/Basic.lean |
5 |
31 |
['github-actions', 'joelriou', 'kckennylau', 'llllvvuu', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
joelriou assignee:joelriou |
1 |
179-3359 5 months ago |
235-37295 235 days ago |
20-33900 20 days |
| 33493 |
michelsol author:michelsol |
feat(RingTheory/Polynomial): An explicit formula for the Chebyshev polynomials of the first kind |
Adds the following explicit formula on the Chebyshev polynomial of the first kind of order n.
${ T_{n}(x)\ =\ \sum \limits _{k=0}^{\lfloor {\frac {n}{2}}\rfloor } {\binom {n}{2k}} \left(\ X^{2}-1\ \right)^{k}\ X^{n-2k}}$
This explicit formula can be found [here](https://en.wikipedia.org/wiki/Chebyshev_polynomials#Explicit_expressions). There is a proof using complex numbers but it only works if the ring R = ℂ.
The proof here is by induction and works in a commutative ring R.
Mathlib seems to extend the definition of Chebyshev polynomials for $n \in \mathbb{Z}$ but this would make the formula more cumbersome with `n.natAbs` in place of `n`'s, so I expressed it on `n : ℕ` directly.
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t-ring-theory
new-contributor
awaiting-author
|
51/1 |
Mathlib/RingTheory/Polynomial/Chebyshev.lean |
1 |
8 |
['YuvalFilmus', 'erdOne', 'github-actions', 'metakunt', 'michelsol'] |
chrisflav assignee:chrisflav |
1 |
154-61750 5 months ago |
154-61750 154 days ago |
35-16104 35 days |
| 11500 |
mcdoll author:mcdoll |
refactor(Topology/Algebra/Module/WeakDual): Clean up |
- Move `Dual` and `dualPairing` lower in the import-hierachy
- deduplicate `dualPairing`
- Bundle continuity statements to `CLM`s.
- Make `WeakDual` and `WeakSpace` reducible
- Remove `refine'` in favor of `refine`
---
Cleaning up `Analysis/NormedSpace/WeakDual` will be done in a second PR
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merge-conflict
awaiting-author
t-topology
|
227/179 |
Mathlib.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/NormedSpace/Dual.lean,Mathlib/Analysis/NormedSpace/WeakDual.lean,Mathlib/Analysis/VonNeumannAlgebra/Basic.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Measure/FiniteMeasure.lean,Mathlib/Topology/Algebra/Module/CharacterSpace.lean,Mathlib/Topology/Algebra/Module/Dual.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,docs/overview.yaml,docs/undergrad.yaml |
15 |
16 |
['ADedecker', 'grunweg', 'j-loreaux', 'kkytola', 'mathlib-bors', 'mcdoll', 'urkud'] |
nobody |
2 |
147-15303 4 months ago |
796-14503 796 days ago |
46-5571 46 days |
| 35134 |
fpvandoorn author:fpvandoorn |
feat(translate): print constant names with hover info |
Part of #34846.
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t-meta
awaiting-author
merge-conflict
|
46/28 |
Mathlib/Tactic/Translate/Core.lean,MathlibTest/toAdditive.lean |
2 |
6 |
['JovanGerb', 'github-actions', 'mathlib-merge-conflicts'] |
JovanGerb assignee:JovanGerb |
1 |
147-7223 4 months ago |
148-86079 148 days ago |
2-13760 2 days |
| 31766 |
SuccessMoses author:SuccessMoses |
feat(Topology/EMetricSpace): continuity of arc length |
fixes half of #31751
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new-contributor
t-topology
awaiting-author
merge-conflict
|
396/0 |
Mathlib.lean,Mathlib/Topology/EMetricSpace/ArcLength.lean,Mathlib/Topology/EMetricSpace/BoundedVariation.lean |
3 |
40 |
['SnirBroshi', 'SuccessMoses', 'alreadydone', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-merge-conflicts'] |
nobody |
1 |
138-74104 4 months ago |
214-74974 214 days ago |
2-77182 2 days |
| 35494 |
Timeroot author:Timeroot |
feat(Topology/Perfect): simp frontier_singleton |
Add simp lemma
```
theorem frontier_singleton {X : Type*} [TopologicalSpace X] [T1Space X]
[PerfectSpace X] (p : X) : frontier {p} = {p}
```
---
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t-topology
awaiting-author
|
4/0 |
Mathlib/Topology/Perfect.lean |
1 |
4 |
['Timeroot', 'github-actions', 'urkud', 'vihdzp'] |
urkud assignee:urkud |
1 |
138-10881 4 months ago |
138-56417 138 days ago |
5-41003 5 days |
| 30431 |
kckennylau author:kckennylau |
feat(RingTheory): a homogeneous submodule is the span of its homogeneous elements |
---
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|
t-ring-theory
merge-conflict
|
22/0 |
Mathlib/RingTheory/GradedAlgebra/Homogeneous/Ideal.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Submodule.lean |
2 |
9 |
['alreadydone', 'github-actions', 'kckennylau', 'mariainesdff', 'mathlib-merge-conflicts'] |
mariainesdff assignee:mariainesdff |
1 |
128-82423 4 months ago |
250-83284 250 days ago |
23-31743 23 days |
| 17627 |
hrmacbeth author:hrmacbeth |
feat: universal properties of vector bundle constructions |
Characterizations for the smoothness of maps into the total spaces of (1) the direct sum of two vector bundles; (2) the pullback of a vector bundle.
This gap in the library was exposed by #17358.
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|
merge-conflict
t-differential-geometry
|
311/9 |
Mathlib/Data/Bundle.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/Pullback.lean,Mathlib/Topology/FiberBundle/Constructions.lean |
4 |
26 |
['PatrickMassot', 'fpvandoorn', 'github-actions', 'grunweg', 'hrmacbeth', 'j-loreaux', 'leanprover-community-bot-assistant', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'sgouezel'] |
grunweg assignee:grunweg |
1 |
128-22415 4 months ago |
388-22154 388 days ago |
91-68315 91 days |
| 19275 |
eric-wieser author:eric-wieser |
fix: if nolint files change, do a full rebuild |
Otherwise CI will succeed when removing entries from the file, but fail later when someone changes something unrelated.
---
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merge-conflict |
8/0 |
lakefile.lean |
1 |
22 |
['YaelDillies', 'adomani', 'eric-wieser', 'fpvandoorn', 'github-actions', 'grunweg', 'mathlib-bors'] |
nobody |
1 |
128-22398 4 months ago |
599-63033 599 days ago |
0-214 3 minutes |
| 33592 |
nielstron author:nielstron |
feat(Computability/ContextFreeGrammar): mapping between two types of nonterminal symbols |
This PR picks up https://github.com/leanprover-community/mathlib4/pull/15895 and resolves the failing lemma by redefining Good symbols.
---
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I checked that https://github.com/leanprover-community/mathlib4/pull/13514 builds correctly when based on this build. PR for that is #33599
This is my first contribution please let me know of any changes I should outline.
[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-computability
new-contributor
|
160/0 |
Mathlib/Computability/ContextFreeGrammar.lean |
1 |
34 |
['YaelDillies', 'github-actions', 'madvorak', 'nielstron'] |
nobody |
1 |
128-11414 4 months ago |
177-39941 177 days ago |
10-68503 10 days |
| 27534 |
PierreQuinton author:PierreQuinton |
feat: a typeclass for `sSup`/`sInf` to be lawful |
Adds lawful infima and suprema type classes.
A preorder with lawful suprema: whenever a set has a least upper bound, `sSup` returns a least upper bound for that set.
A preorder with lawful infima: whenever a set has a greatest lower bound, `sInf` returns a greastest lower bound for that set.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-order
|
121/8 |
Mathlib.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/LawfulSupInf.lean |
3 |
26 |
['PierreQuinton', 'YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] |
nobody |
1 |
120-7118 3 months ago |
235-38193 235 days ago |
114-38193 114 days |
| 30872 |
rudynicolop author:rudynicolop |
feat(Computability/NFA): NFA closure under concatenation |
This PR proves that regular languages are closed under concatenation via a direct construction on `NFA`s without `εNFA` nor ε-transitions. The main new definitions and results include:
- `M1.concat M2`, the concatenation of `NFA`s `M1` and `M2`, a direct construction without ε-transitions.
- Theorem `accepts_concat : (M1.concat M2).accepts = M1.accepts * M2.accepts`, showing the correctness of the construction.
- Theorem `IsRegular.mul`, showing that regular languages are closed under concatenation.
---
- [x] depends on: #31038
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|
t-computability
new-contributor
awaiting-author
|
104/7 |
Mathlib/Computability/NFA.lean |
1 |
67 |
['YaelDillies', 'ctchou', 'eric-wieser', 'github-actions', 'lambda-fairy', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'rudynicolop'] |
nobody |
2 |
120-7052 3 months ago |
163-81693 163 days ago |
59-63981 59 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 |
1 |
116-70210 3 months ago |
143-31372 143 days ago |
0-187 3 minutes |
| 26078 |
kckennylau author:kckennylau |
feat(AlgebraicGeometry): add x, y, px, py for points on elliptic curves |
---
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Split from #25218.
[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-algebraic-geometry
|
44/0 |
Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean |
1 |
12 |
['MichaelStollBayreuth', 'Multramate', 'acmepjz', 'dagurtomas', 'github-actions', 'kckennylau'] |
nobody |
1 |
116-5345 3 months ago |
325-11793 325 days ago |
64-11252 64 days |
| 31141 |
peabrainiac author:peabrainiac |
feat(Analysis/Calculus): parametric integrals over smooth functions are smooth |
Show that for any smooth function `f : H × ℝ → E`, the parametric integral `fun x ↦ ∫ t in a..b, f (x, t) ∂μ` is smooth too.
The argument proceeds inductively, using the fact that derivatives of parametric integrals can themselves be computed as parametric integrals. The necessary lemmas on derivatives of parametric integrals already existed, but took some work to apply due to their generality; we state some convenient special cases.
---
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- [x] depends on: #31077
[](https://gitpod.io/from-referrer/)
|
t-analysis
awaiting-author
|
470/12 |
Mathlib/Analysis/Calculus/ParametricIntegral.lean,Mathlib/Analysis/Calculus/ParametricIntervalIntegral.lean,Mathlib/MeasureTheory/Integral/DominatedConvergence.lean,Mathlib/Topology/NhdsWithin.lean,Mathlib/Topology/Separation/Regular.lean |
5 |
36 |
['fpvandoorn', 'github-actions', 'j-loreaux', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'peabrainiac', 'sgouezel'] |
j-loreaux assignee:j-loreaux |
1 |
113-47031 3 months ago |
151-25655 151 days ago |
33-85043 33 days |
| 20719 |
gio256 author:gio256 |
feat(AlgebraicTopology): delaborators for truncated simplicial notations |
We add delaborators for the following notations, introduced in #20688:
- `⦋m⦌ₙ`, which denotes the `m`-dimensional simplex in the `n`-truncated simplex category.
- `X _⦋m⦌ₙ`, which denotes the `m`-th term of an `n`-truncated simplicial object `X`.
- `X ^⦋m⦌ₙ`, which denotes the `m`-th term of an `n`-truncated cosimplicial object `X`.
If `pp.proofs` is set to `true`, we also pretty-print the proof `p : m ≤ n` for all three notations as `⦋m, p⦌ₙ`, `X _⦋m, p⦌ₙ`, and `X ^⦋m, p⦌ₙ`, respectively.
Credit to @kmill for one piece of code and much metaprogramming inspiration.
---
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- [x] depends on: #20688
- [x] depends on: #23018
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebraic-topology
infinity-cosmos
t-meta
please-adopt
will-close-soon
|
525/33 |
Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/AlgebraicTopology/SimplicialObject/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/SimplexCategory.lean,Mathlib/Util/Superscript.lean,MathlibTest/SimplexCategory.lean,MathlibTest/SimplicialObject.lean,MathlibTest/superscript.lean,scripts/noshake.json |
11 |
24 |
['eric-wieser', 'gio256', 'github-actions', 'joneugster', 'kim-em', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] |
nobody |
1 |
107-30215 3 months ago |
356-77841 356 days ago |
88-84229 88 days |
| 21476 |
grunweg author:grunweg |
feat(lint-style): enable running on downstream projects |
Enable lint-style to run on downstream projects, by making the following modifications:
- allow passing an explicit list of libraries to lint: if nothing is passed, it lints `Mathlib`, `Archive` and `Counterexamples` (as before); otherwise, it lints precisely the passed modules
- only check init imports, undocumented scripts and the errors from `lint-style.py` when linting Mathlib
- make the style exceptions file configurable and optional: using the `nolints-file` flag, the exceptions file can be configured. If the flag is omitted, we try to find a file at `scripts/nolints-style.txt` --- and otherwise proceed with no style exceptions.
This means mathlib can continue unchanged, and downstream projects can either add an explicit exceptions file, or proceed without any exceptions.
After this PR, one should be able to run lint-style on a downstream project by `lake exe lint-style ProjectName`.
Prompted by [this zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/lint-style.20for.20downstream.20libraries).
---
- [x] depends on: #24570
- [x] depends on: #24953
(I did not test the last part.)
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-linter
awaiting-author
please-adopt
|
58/19 |
Mathlib/Tactic/Linter/TextBased.lean,scripts/lint-style.lean |
2 |
21 |
['Vierkantor', 'adomani', 'github-actions', 'grunweg', 'joneugster', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] |
nobody |
1 |
107-29664 3 months ago |
422-8369 422 days ago |
43-17409 43 days |
| 37111 |
tannerduve author:tannerduve |
feat(Computability): add Nat.PrimrecIn and PrimrecIn |
- Add `Nat.PrimrecIn`: primitive recursive functions relative to a set of oracles
- Add `PrimrecIn`: lifts `Nat.PrimrecIn` to `Primcodable` types
A `PrimrecIn` version of `RecursiveIn.iff_nat` (i.e., `PrimrecIn O (f : ℕ → ℕ) ↔ Nat.PrimrecIn O f`) is left as future work as it requires proving `Nat.PrimrecIn O Nat.pred`, which needs additional API for `Nat.PrimrecIn`.
---
Split out from #34937 as requested in review.
- [x] depends on: #37061 |
t-computability
new-contributor
awaiting-author
|
24/0 |
Mathlib/Computability/RecursiveIn.lean |
1 |
14 |
['Komyyy', 'bryangingechen', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'tannerduve'] |
nobody |
1 |
92-78722 3 months ago |
94-5181 94 days ago |
1-79421 1 day |
| 32889 |
artie2000 author:artie2000 |
feat(Algebra): forgetful lemmas for `map` and `comap` on substructures |
* Standardise the form of forgetful lemmas for `map` and `comap` (ie, `(co)map_toSubfoo`)
* Add missing lemmas of this form
* Mark all such lemmas as `simp`
---
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[](https://gitpod.io/from-referrer/)
|
t-algebra
awaiting-author
merge-conflict
label:t-algebra$ |
72/17 |
Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Star/Subalgebra.lean |
6 |
30 |
['YaelDillies', 'artie2000', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'vihdzp'] |
nobody |
1 |
89-30611 2 months ago |
206-76982 206 days ago |
2-56660 2 days |
| 37247 |
yuma-mizuno author:yuma-mizuno |
feat(GroupTheory/MonoidLocalization): add prime transport lemmas |
---
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[](https://gitpod.io/from-referrer/)
|
t-ring-theory
awaiting-author
|
75/7 |
Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean |
3 |
6 |
['github-actions', 'riccardobrasca'] |
riccardobrasca assignee:riccardobrasca |
1 |
87-32375 2 months ago |
87-32375 87 days ago |
20-41780 20 days |
| 6777 |
adomani author:adomani |
chore(Co*variantClass): replace eta-expanded (· * ·), (· + ·), (· ≤ ·), (· < ·) |
Replace `CovariantClass X X (· * ·) (· ≤ ·)` with -> `CovariantClass X X HMul.hMul LE.le` and similarly for `HAdd`, `LT`, `Contravariant`.
This PR is inspired by [Issue #6646](https://github.com/leanprover-community/mathlib4/issues/6646) and, more specifically, [this comment](https://github.com/leanprover-community/mathlib4/issues/6646#issuecomment-1692792066).
Note that https://github.com/leanprover/lean4/pull/2267 would make this unnecessary
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```bash
# First sed command:
# the first captured pattern is `Co*variantClass <type> <type> `
# the second captured pattern is `<type>`
# the third captured pattern is `+` or `*`
# the fourth captured pattern is `<` or `≤`
# a match for `Co*variantClass <type> <type> (· <op> ·) (· <rel> ·)` becomes
# `Co*variantClass <type> <type> replaceop<op> replaceop<rel>`
# Second sed command: similar to the first, but looks for `(Function.swap (· <op> ·))`
sed -i '
s=\(Co[ntra]*variantClass \(..*\) \2 \)(· *\([+*]\) *·) (· *\([<≤]\) *·)=\1replaceop\3 replaceop\4=g
s=\(Co[ntra]*variantClass \(..*\) \2 \)(\([Functio\.swap ]*\)(· *\([+*]\) *·)) (· *\([<≤]\) *·)=\1(\3replaceop\4) replaceop\5=g
s=replaceop+=HAdd.hAdd=g
s=replaceop\*=HMul.hMul=g
s=replaceop<=LT.lt=g
s=replaceop≤=LE.le=g
s=\(Co[ntra]*variantClass N N\) (· \* ·) r=\1 HMul.hMul r=g
s=\(Co[ntra]*variantClass N N (swap μ)\) (· ≤ ·)=\1 LE.le=g
s=\(Co[ntra]*variantClass N N\) (swap (· \* ·)) r=\1 (swap HMul.hMul) r=g
s=\(CovariantClass (Filter α) (Filter α)\) (· / ·) (· ≤ ·)=\1 HDiv.hDiv LE.le=g
s=\(CovariantClass (Filter α) (Filter α)\) (swap (· / ·)) (· ≤ ·)=\1 (swap HDiv.hDiv) LE.le=g
s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· ≤ ·)=\1 LE.le=g
s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· < ·)=\1 LT.lt=g
s=\(Co[ntra]*variantClass [^}]*\) (· ≤ ·)=\1 LE.le=g
s=\(CovariantClass .* (Filter β)\) (· • ·) LE.le=\1 HSMul.hSMul LE.le=g
' $(git ls-files '*.lean')
```
[](https://gitpod.io/from-referrer/)
|
merge-conflict |
703/678 |
Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/Bounds.lean,Mathlib/Algebra/CovariantAndContravariant.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/GroupPower/Order.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/Archimedean.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Group/DenselyOrdered.lean,Mathlib/Algebra/Order/Group/MinMax.lean,Mathlib/Algebra/Order/Group/OrderIso.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Interval.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/LatticeGroup.lean,Mathlib/Algebra/Order/Module.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Cancel/Defs.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/Lemmas.lean,Mathlib/Algebra/Order/Monoid/MinMax.lean,Mathlib/Algebra/Order/Monoid/NatCast.lean,Mathlib/Algebra/Order/Monoid/OrderDual.lean,Mathlib/Algebra/Order/Monoid/Prod.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithZero/Basic.lean,Mathlib/Algebra/Order/Monoid/WithZero/Defs.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Pointwise.lean,Mathlib/Algebra/Order/Positive/Ring.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Lemmas.lean,Mathlib/Algebra/Order/Sub/Basic.lean,Mathlib/Algebra/Order/Sub/Canonical.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Algebra/Order/WithZero.lean,Mathlib/Algebra/Parity.lean,Mathlib/Algebra/Star/Order.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Normed/Order/Lattice.lean,Mathlib/Data/DFinsupp/Lex.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/List/BigOperators/Basic.lean,Mathlib/Data/List/BigOperators/Lemmas.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Nat/Cast/Order.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/Real/ENNReal.lean,Mathlib/Data/Real/NNReal.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/Data/Sign.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/VectorMeasure.lean,Mathlib/Order/ConditionallyCompleteLattice/Group.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Martingale/Basic.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/PGame.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/NaturalOps.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/Positivity/Basic.lean,Mathlib/Topology/ContinuousFunction/Algebra.lean,lean-toolchain,test/Recall.lean,test/propose.lean |
81 |
37 |
['adomani', 'alreadydone', 'digama0', 'eric-wieser', 'ericrbg', 'jcommelin', 'leanprover-bot', 'sgouezel', 'vihdzp'] |
nobody |
1 |
86-52792 2 months ago |
986-2552 986 days ago |
35-63136 35 days |
| 34092 |
staroperator author:staroperator |
feat(SetTheory/ZFC): properties of `ZFSet.omega` |
---
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any "Co-authored-by" lines) using the following format:
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[](https://gitpod.io/from-referrer/)
|
t-set-theory
awaiting-author
|
77/10 |
Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Ordinal.lean,Mathlib/SetTheory/ZFC/PSet.lean |
3 |
31 |
['Komyyy', 'YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot', 'staroperator', 'vihdzp'] |
YaelDillies assignee:YaelDillies |
1 |
76-36673 2 months ago |
76-36673 76 days ago |
99-7345 99 days |
| 36740 |
euprunin author:euprunin |
chore: golf using `grind` |
The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective.
Trace profiling results (differences <30 ms considered measurement noise):
* `AlgebraicGeometry.Scheme.isBasis_affineOpens`: unchanged 🎉
* `SimpleGraph.Walk.takeUntil_eq_take`: 263 ms before, 180 ms after 🎉
* `SimpleGraph.Walk.dropUntil_eq_drop`: 382 ms before, 261 ms after 🎉
* `Int.image_Ico_emod`: unchanged 🎉
* `Equiv.Perm.ofSubtype_swap_eq`: unchanged 🎉
Profiled using `set_option trace.profiler true in`.
---
<!-- Your PR title will become the first line of the commit message.
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Co-authors in the squash commit are gathered from two sources:
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-->
[](https://gitpod.io/from-referrer/)
|
merge-conflict |
7/33 |
Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Data/Int/Interval.lean,Mathlib/GroupTheory/Perm/Support.lean |
4 |
8 |
['artie2000', 'chenson2018', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
1 |
73-74733 2 months ago |
73-74734 73 days ago |
43-5868 43 days |
| 32880 |
0xTerencePrime author:0xTerencePrime |
feat(Analysis/Asymptotics): define subpolynomial growth |
## Main definitions
* `Asymptotics.IsSubpolynomial l f g`: A function `f` has subpolynomial growth with respect to `g` along filter `l` if `f = O(1 + ‖g‖^k)` for some natural `k`.
## Main results
* `IsSubpolynomial.const`: Constant functions have subpolynomial growth
* `IsSubpolynomial.id`: Identity has subpolynomial growth
* `IsSubpolynomial.add`: Closure under addition
* `IsSubpolynomial.neg`: Closure under negation
* `IsSubpolynomial.sub`: Closure under subtraction
* `IsSubpolynomial.mul`: Closure under multiplication
* `IsSubpolynomial.pow`: Closure under powers
* `isSubpolynomial_iff_one_add`: Equivalence with `(1 + ‖g‖)^k` formulation
* `IsSubpolynomial.uniform`: Uniform bounds for finite families
## Implementation notes
The definition uses `1 + ‖g‖^k` rather than `(1 + ‖g‖)^k` as the primary form, with the equivalence established in `isSubpolynomial_iff_one_add`. Four private auxiliary lemmas handle the key inequalities needed for closure proofs.
Closes #32658
|
awaiting-author
t-analysis
new-contributor
|
184/0 |
Mathlib.lean,Mathlib/Analysis/Asymptotics/Subpolynomial.lean |
2 |
29 |
['0xTerencePrime', 'ADedecker', 'github-actions', 'j-loreaux'] |
ADedecker assignee:ADedecker |
1 |
70-32366 2 months ago |
180-84337 180 days ago |
22-22665 22 days |
| 38170 |
maddycrim author:maddycrim |
feat(Algebra/Module/FinitePresentation): Finitely Presented Module Lemma |
From FLT Project
Main Definitions:
`Module.FinitePresentation.exists_fin_exact` : A finitely presented module M admits an exact sequence F' -> F -> M -> 0 where F' and F are finite free modules.
---
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[](https://gitpod.io/from-referrer/)
|
t-algebra
new-contributor
awaiting-author
label:t-algebra$ |
9/0 |
Mathlib/Algebra/Module/FinitePresentation.lean |
1 |
17 |
['chrisflav', 'github-actions', 'maddycrim', 'themathqueen', 'vlad902'] |
nobody |
1 |
68-37139 2 months ago |
68-37139 68 days ago |
17-43852 17 days |
| 36832 |
KryptosAI author:KryptosAI |
chore(Data/Finset/Card): rename `pred_card_le_card_erase` to `sub_one_card_le_card_erase` |
## Summary
The name `pred_card_le_card_erase` suggests `Nat.pred` but the statement uses `- 1` (i.e., `Nat.sub 1`). Rename to `sub_one_card_le_card_erase` to match the actual statement.
A deprecated alias is added for backwards compatibility.
### Files changed
- `Mathlib/Data/Finset/Card.lean` — definition renamed + deprecated alias
- `Mathlib/Data/Finset/Powerset.lean` — reference updated
- `Mathlib/Combinatorics/Additive/SubsetSum.lean` — reference updated
- `Mathlib/Algebra/Polynomial/EraseLead.lean` — reference updated
Addresses the `Finset.pred_card_le_card_erase` item in #21584.
## AI disclosure
I used Claude Code to explore the codebase (finding all references to rename) and to draft the PR description. I reviewed and understand all changes — these are straightforward renames with a deprecated alias. |
new-contributor
awaiting-author
|
22/15 |
Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Combinatorics/Additive/SubsetSum.lean,Mathlib/Combinatorics/SetFamily/AhlswedeZhang.lean,Mathlib/Combinatorics/SetFamily/Shadow.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Set/Card.lean,Mathlib/GroupTheory/Perm/Support.lean,Mathlib/RingTheory/Ideal/Operations.lean |
9 |
8 |
['KryptosAI', 'Multramate', 'dagurtomas', 'github-actions', 'mattrobball', 'ooovi'] |
nobody |
1 |
55-21509 1 month ago |
55-21509 55 days ago |
59-48094 59 days |
| 33928 |
jsm28 author:jsm28 |
feat(Combinatorics/Tiling/TileSet): indexed families of tiles |
Define the type `TileSet` for indexed families of tiles (in a discrete context), and some associated definitions (including `symmetryGroup`) and API lemmas.
`TileSet` can be used for tilings of the whole space; for tilings of part of the space; for patches of tiles (extracted from a tiling by considering tiles meeting some set of points, or considered on their own without extracting from a tiling); for multiple tilings (covering the space more than once). In particular, the fact that people study multiple tilings provides a clear justification for using indexed families rather than sets of tiles, and basic definitions and API lemmas generally work for all these different uses of `TileSet` (sometimes with weak constraints such as tiles being finite, nonempty and only having finitely many tiles meeting any point of the space).
Definitions for saying e.g. "this `TileSet` is a tiling of the whole space" are to be included in subsequent files in subsequent PRs.
From AperiodicMonotilesLean.
---
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[](https://gitpod.io/from-referrer/)
|
t-combinatorics |
460/0 |
Mathlib.lean,Mathlib/Combinatorics/Tiling/TileSet.lean |
2 |
23 |
['Parcly-Taxel', 'b-mehta', 'eric-wieser', 'github-actions', 'jsm28', 'vihdzp'] |
nobody |
1 |
54-63092 1 month ago |
179-80200 179 days ago |
179-79850 179 days |
| 36774 |
euprunin author:euprunin |
chore: replace long terminal `rw […]`:s (≥4 lemmas) with bare `simp`:s |
The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective.
Trace profiling results (differences <30 ms considered measurement noise):
* `Finset.lcm_union`: unchanged 🎉
* `Finset.gcd_union`: unchanged 🎉
* `Polynomial.derivative_eval₂_C`: unchanged 🎉
* `Polynomial.expand_pow`: unchanged 🎉
* `Cardinal.mk_real`: unchanged 🎉
* `Real.log_zpow`: unchanged 🎉
* `Matroid.eRank_le_encard_add_eRk_compl`: unchanged 🎉
* `DFinsupp.single_tsub`: unchanged 🎉
* `EReal.inv_neg`: unchanged 🎉
* `Finsupp.toMultiset_map`: unchanged 🎉
* `Finsupp.single_tsub`: unchanged 🎉
* `Multiset.countP_map`: unchanged 🎉
* `Nat.ascFactorial_eq_factorial_mul_choose'`: unchanged 🎉
* `Real.sign_intCast`: unchanged 🎉
* `Real.volume_eball`: unchanged 🎉
* `Real.volume_closedEBall`: unchanged 🎉
* `LFunction_ne_zero_of_not_quadratic_or_ne_one`: 295 ms before, 152 ms after 🎉
* `hasSum_one_div_nat_pow_mul_cos`: unchanged 🎉
* `inv_eq_of_aeval_divX_ne_zero`: unchanged 🎉
* `AlgebraicIndependent.aeval_comp_mvPolynomialOptionEquivPolynomialAdjoin`: unchanged 🎉
* `Ordinal.deriv_mul_eq_opow_omega0_mul`: unchanged 🎉
Profiled using `set_option trace.profiler true in`.
---
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In this box, the text above the `---` (if not empty) will be appended
to the commit message, and can be used to give additional context or
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one way to add co-authors is to include at least one commit authored by
each co-author among the commits in the pull request. If necessary, you
may create empty commits to indicate co-authorship, using commands like so:
git commit --author="Author Name <author@email.com>" --allow-empty -m "add Author Name as coauthor"
Second, co-authors can also be listed in lines at the very bottom of
the commit message (that is, directly before the `---`) using the following format:
Co-authored-by: Author Name <author@email.com>
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at the bottom of the commit message (before the `---`, and also before
any "Co-authored-by" lines) using the following format:
Moves:
- Vector.* -> List.Vector.*
- ...
Deletions:
- Nat.bit1_add_bit1
- ...
Any other comments you want to keep out of the PR commit should go
below the `---`, and placed outside this HTML comment, or else they
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[](https://gitpod.io/from-referrer/)
|
merge-conflict |
22/24 |
Mathlib/Algebra/GCDMonoid/Finset.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Expand.lean,Mathlib/Analysis/Real/Cardinality.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Combinatorics/Matroid/Rank/ENat.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/EReal/Inv.lean,Mathlib/Data/Finsupp/Multiset.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Multiset/Filter.lean,Mathlib/Data/Nat/Choose/Basic.lean,Mathlib/Data/Real/Sign.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/NumberTheory/LSeries/Nonvanishing.lean,Mathlib/NumberTheory/ZetaValues.lean,Mathlib/RingTheory/Algebraic/Basic.lean,Mathlib/RingTheory/AlgebraicIndependent/Basic.lean,Mathlib/SetTheory/Ordinal/FixedPoint.lean |
19 |
3 |
['artie2000', 'euprunin', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
1 |
50-4540 1 month ago |
50-4541 50 days ago |
67-395 67 days |
| 26975 |
Whysoserioushah author:Whysoserioushah |
feat: a norm_num extension for complex numbers |
co-authored-by : @thefundamentaltheor3m, @hrmacbeth
---
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* depends on: #39628
* depends on: #39620
[](https://gitpod.io/from-referrer/)
|
t-meta |
444/14 |
Mathlib.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/NormNum/Eq.lean,Mathlib/Tactic/NormNum/NormNumI.lean,Mathlib/Tactic/NormNum/OfScientific.lean,Mathlib/Tactic/NormNum/Result.lean,MathlibTest/norm_numI.lean |
10 |
76 |
['JovanGerb', 'Vierkantor', 'Whysoserioushah', 'dupuisf', 'eric-wieser', 'github-actions', 'grunweg', 'hrmacbeth', 'mathlib4-merge-conflict-bot'] |
eric-wieser assignee:eric-wieser |
1 |
47-61923 1 month ago |
52-83797 52 days ago |
112-30556 112 days |
| 39907 |
Hagb author:Hagb |
feat(Order/InititalSeg): `PrincipalSeg` is trichotomous for well orders |
For any two well orders, one is a principal segment of the other, or they are isomorphic.
Suggested by @vihdzp in the review of #39545
https://github.com/leanprover-community/mathlib4/pull/39545#discussion_r3262466782. It may slightly simplify the proof of `infinite_iff_nonempty_relEmbedding_of_isWellOrder`.
---
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|
t-order |
7/0 |
Mathlib/Order/InitialSeg.lean |
1 |
1 |
['github-actions', 'vihdzp'] |
nobody |
1 |
46-7745 1 month ago |
46-50055 46 days ago |
46-49705 46 days |
| 34875 |
banrovegrie author:banrovegrie |
feat(LinearAlgebra/Matrix): add Sherman-Morrison formula |
Mathlib has the matrix determinant lemma (`det_add_replicateCol_mul_replicateRow` in SchurComplement.lean) but lacked the corresponding inverse formula. This PR fills that gap.
- Add `Matrix.inv_add_vecMulVec`: Sherman-Morrison formula for `(A + uv^T)^{-1}`
- Add `Matrix.inv_sub_vecMulVec`: subtraction variant
- Add `Matrix.isUnit_det_add_vecMulVec`: invertibility under the formula's hypotheses
## Test plan
- [x] `lake build` passes
- [x] Lines within 100 char limit
- [x] All declarations have docstrings
**Any specific AI usage?**: Used Copilot for review purposes. |
t-algebra
new-contributor
awaiting-author
label:t-algebra$ |
135/0 |
Mathlib.lean,Mathlib/LinearAlgebra/Matrix/ShermanMorrison.lean |
2 |
15 |
['Xxxjdjdid', 'banrovegrie', 'chrisflav', 'copilot-pull-request-reviewer', 'eric-wieser', 'github-actions', 'wwylele'] |
chrisflav assignee:chrisflav |
1 |
42-3587 1 month ago |
88-4664 88 days ago |
69-6728 69 days |
| 40040 |
JovanGerb author:JovanGerb |
chore(Order/Bounds/Basic): add missing `to_dual` tags |
This PR adds some `to_dual` tags that weren't added in #35208
---
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|
t-order |
43/68 |
Mathlib/Order/Bounds/Basic.lean |
1 |
1 |
['github-actions', 'vihdzp'] |
nobody |
1 |
40-48380 1 month ago |
43-28976 43 days ago |
43-28626 43 days |
| 32989 |
kim-em author:kim-em |
fix(Tactic/Simps): skip @[defeq] inference for non-exposed definitions |
This PR makes `@[simps]` check whether the source definition's body is exposed before calling `inferDefEqAttr`. When the body is not exposed, we skip the `@[defeq]` inference to avoid validation errors.
Without this fix, using `@[simps]` on a definition that is not `@[expose]`d produces an error like:
```
Theorem Foo_bar has a `rfl`-proof and was thus inferred to be `@[defeq]`, but validating that attribute failed:
Not a definitional equality: the left-hand side ... is not definitionally equal to the right-hand side ...
Note: This theorem is exported from the current module. This requires that all definitions that need to be unfolded to prove this theorem must be exposed.
```
The fix checks `(← getEnv).setExporting true |>.find? cfg.srcDeclName |>.any (·.hasValue)` to determine if the definition body is visible in the public scope, and only calls `inferDefEqAttr` if it is.
🤖 Prepared with Claude Code |
t-meta
LLM-generated
|
68/16 |
Mathlib/CategoryTheory/Triangulated/TStructure/TruncLTGE.lean,Mathlib/Tactic/Simps/Basic.lean,Mathlib/Tactic/Translate/Core.lean,MathlibTest/SimpsModule.lean |
4 |
22 |
['JovanGerb', 'Vierkantor', 'github-actions', 'joneugster', 'kim-em', 'mathlib-merge-conflicts'] |
nobody |
1 |
38-53088 1 month ago |
38-50332 38 days ago |
37-21977 37 days |
| 33355 |
0xTerencePrime author:0xTerencePrime |
feat(Combinatorics/SimpleGraph/Connectivity): define vertex connectivity |
**AI Disclosure**: Developed with LLM assistance (Claude). All mathematical design decisions were made by the author.
---
This PR introduces the foundations of vertex connectivity for simple graphs, providing a counterpart to the edge connectivity theory in #32870.
### Main definitions
- `SimpleGraph.IsVertexReachable`: two vertices are `k`-vertex-reachable if they remain reachable after removing any set of strictly fewer than `k` vertices, using `G.induce sᶜ`.
- `SimpleGraph.IsVertexPreconnected`: a graph is `k`-vertex-preconnected if any two vertices are `k`-vertex-reachable.
- `SimpleGraph.IsVertexConnected`: a graph is `k`-vertex-connected if it is `k`-vertex-preconnected and has more than `k` vertices (`k + 1 ≤ ENat.card V`).
### Key lemmas
- `k = 0`: 0-connected ↔ nonempty; 0-preconnected always holds
- `k = 1`: 1-connected ↔ `Nontrivial V ∧ G.Preconnected`
- `anti` / `mono`: antitonic in `k`, monotonic in the graph |
new-contributor
t-combinatorics
LLM-generated
awaiting-author
merge-conflict
|
169/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/VertexConnectivity.lean |
2 |
166 |
['0xTerencePrime', 'SnirBroshi', 'SproutSeeds', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] |
b-mehta assignee:b-mehta |
1 |
34-76234 1 month ago |
40-72698 40 days ago |
65-5110 65 days |
| 40502 |
metakunt author:metakunt |
feat(RingTheory/RootsOfUnits/PrimitiveRoots): pow_div_gcd |
From #39404 |
t-ring-theory |
13/11 |
Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean |
1 |
2 |
['github-actions', 'tb65536'] |
nobody |
1 |
31-9711 1 month ago |
31-10593 31 days ago |
31-10816 31 days |
| 39558 |
b-mehta author:b-mehta |
feat(Data/Finset/Prod): count the number of ordered pairs in a set |
These proofs were written a while ago, so they may be golfable
---
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- Nat.bit1_add_bit1
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[](https://gitpod.io/from-referrer/)
|
t-data
awaiting-author
|
11/0 |
Mathlib/Data/Finset/Prod.lean |
1 |
5 |
['b-mehta', 'github-actions', 'j-loreaux', 'plp127'] |
joneugster assignee:joneugster |
1 |
28-47000 28 days ago |
28-47000 28 days ago |
22-55326 22 days |
| 39579 |
hawkrobe author:hawkrobe |
feat(RingTheory): Bialgebra / Hopf algebra structure on SymmetricAlgebra |
Adds Hopf algebra structure on SymmetricAlgebra.
---
- [x] depends on: #39483
- [x] depends on: #39785
- [ ] depends on: #39841
- [ ] depends on: #31898
- [ ] depends on: #39790 |
t-ring-theory
new-contributor
blocked-by-other-PR
merge-conflict
|
691/22 |
Mathlib.lean,Mathlib/LinearAlgebra/TensorAlgebra/Basic.lean,Mathlib/RingTheory/Bialgebra/Primitive.lean,Mathlib/RingTheory/Bialgebra/Quotient.lean,Mathlib/RingTheory/Bialgebra/SymmetricAlgebra.lean,Mathlib/RingTheory/Bialgebra/TensorAlgebra.lean,Mathlib/RingTheory/Coalgebra/Quotient.lean,Mathlib/RingTheory/HopfAlgebra/Generators.lean,Mathlib/RingTheory/HopfAlgebra/Primitive.lean,Mathlib/RingTheory/HopfAlgebra/Quotient.lean,Mathlib/RingTheory/HopfAlgebra/SymmetricAlgebra.lean,Mathlib/RingTheory/HopfAlgebra/TensorAlgebra.lean |
12 |
14 |
['YaelDillies', 'github-actions', 'hawkrobe', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
YaelDillies assignee:YaelDillies |
1 |
26-82661 26 days ago |
48-82093 48 days ago |
1-18386 1 day |
| 36706 |
kim-em author:kim-em |
feat(Tactic/FastInstance): warn when a synthesized sub-instance has leaky binder types |
This PR adds a warning to `fast_instance%` and `inferInstanceAs%` when they encounter a synthesized sub-instance that has leaky data-field binder types.
When `fast_instance%` recursively normalizes a class instance, it uses `trySynthInstance` to find canonical sub-instances. If a found sub-instance is not canonical at instances transparency (i.e., its internal lambda binder types reference an unexpanded type alias instead of the target carrier), the tool now emits a warning:
```
fast_instance%: 'leakySub' (for
SubClass MyNat) has leaky data-field binder types, which may cause `isDefEq` failures at
instances transparency (e.g. in `grind`). Consider redefining it with `fast_instance%` or
`inferInstanceAs%`.
To suppress: `set_option Elab.fast_instance.warnLeakySubInstances false`
```
The leakiness check uses `withDisabledInstance` to temporarily evict the sub-instance from the discrimination tree (preventing trivial self-match via `trySynthInstance`), then compares against the canonical form at instances transparency. A `warnLeaky` parameter propagates through recursive calls to prevent nested warnings.
The warning is suppressed via `set_option Elab.fast_instance.warnLeakySubInstances false`.
- [ ] depends on: #36701
🤖 Prepared with Claude Code |
t-meta
blocked-by-other-PR
LLM-generated
merge-conflict
|
410/20 |
Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/RingTheory/Congruence/Defs.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/DefEqAbuse.lean,Mathlib/Tactic/FastInstance.lean,MathlibTest/CheckInstance.lean,MathlibTest/DefEqAbuse.lean,MathlibTest/InferInstanceAsPercent.lean |
10 |
10 |
['Vierkantor', 'eric-wieser', 'github-actions', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
Vierkantor assignee:Vierkantor |
1 |
26-44172 26 days ago |
118-55831 118 days ago |
0-1003 16 minutes |
| 38702 |
jcommelin author:jcommelin |
chore(Data/Real): encapsulate real numbers |
This PR:
* hides the definition of the real numbers
* preserves defeqs when casting `Nat`, `Int`, `Rat`, into the reals
* preserves the defeq `x - y = x + (-y)` for `x y : Real`
* removes a bunch of technical debt
* adjusts imports in the library, where files relied on getting access to Cauchy sequences transitively via importing the reals.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
|
235/256 |
Archive/Imo/Imo2013Q5.lean,Counterexamples/SeminormLatticeNotDistrib.lean,Mathlib.lean,Mathlib/Analysis/Complex/Norm.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/Real/Cardinality.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/Counting.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Real/Archimedean.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Data/Real/Cauchy.lean,Mathlib/Data/Real/Sign.lean,Mathlib/NumberTheory/Padics/PadicIntegers.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/SelbergSieve.lean,Mathlib/Topology/Algebra/Ring/Real.lean,Mathlib/Topology/Instances/Real/Lemmas.lean,Mathlib/Topology/MetricSpace/CauSeqFilter.lean,Mathlib/Topology/UniformSpace/CompareReals.lean,Mathlib/Topology/UniformSpace/Real.lean,MathlibTest/Complex.lean,MathlibTest/Quaternion.lean,MathlibTest/Real.lean,MathlibTest/peel.lean |
26 |
37 |
['JovanGerb', 'Kha', 'YaelDillies', 'eric-wieser', 'fpvandoorn', 'github-actions', 'jcommelin', 'leanprover-radar', 'mathlib-bors', 'mathlib-merge-conflicts', 'riccardobrasca', 'sgouezel', 'wkrozowski'] |
nobody |
1 |
25-4271 25 days ago |
74-22928 74 days ago |
0-2637 43 minutes |
| 36686 |
euprunin author:euprunin |
chore: golf using `grind` |
The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective.
Trace profiling results (differences <30 ms considered measurement noise):
* `List.prod_map_ite`: unchanged 🎉
* `Path.Homotopy.trans_assoc_reparam`: 2938 ms before, 717 ms after 🎉
* `SimplexCategory.δ_comp_δ`: 522 ms before, 316 ms after 🎉
* `Finsupp.ext_iff'`: unchanged 🎉
* `Computation.bind_assoc`: unchanged 🎉
* `Set.piecewise_insert`: unchanged 🎉
* `ZMod.valMinAbs_mem_Ioc`: unchanged 🎉
* `Matrix.det_eq_of_forall_row_eq_smul_add_pred_aux`: 2141 ms before, 2004 ms after 🎉
Profiled using `set_option trace.profiler true in`.
---
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Deletions:
- Nat.bit1_add_bit1
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|
awaiting-author |
11/50 |
Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Seq/Computation.lean,Mathlib/Data/Set/Piecewise.lean,Mathlib/Data/ZMod/ValMinAbs.lean,Mathlib/LinearAlgebra/Matrix/Determinant/Basic.lean |
8 |
14 |
['artie2000', 'chenson2018', 'dagurtomas', 'euprunin', 'github-actions', 'mathlib-merge-conflicts', 'ooovi'] |
nobody |
2 |
24-67823 24 days ago |
67-80796 67 days ago |
49-23305 49 days |
| 40579 |
jcreinhold author:jcreinhold |
feat(Algebra/Category/Ring): preserve limits to CommMonCat |
Adds the missing instance saying that forgetting a commutative ring to its multiplicative commutative monoid preserves limits. |
t-algebra
new-contributor
label:t-algebra$ |
7/0 |
Mathlib/Algebra/Category/Ring/Limits.lean |
1 |
7 |
['felixpernegger', 'github-actions', 'jcreinhold'] |
nobody |
1 |
23-45833 23 days ago |
28-30905 28 days ago |
28-39029 28 days |
| 38968 |
eric-wieser author:eric-wieser |
fix: improve defeqs of comp actions |
The (deliberately) non-reducible `SMul.comp.smul` definition caused us to end with these failing unification examples at instance reducibility:
```lean
example : (Module.compHom ℕ (RingHom.id ℕ)).toSMul = SMul.comp ℕ (RingHom.id ℕ) := by
with_reducible_and_instances rfl
example : (Module.compHom ℕ (RingHom.id ℕ)).toMulAction = MulAction.compHom ℕ (MonoidHom.id ℕ) := by
with_reducible_and_instances rfl
```
There are two issues this fixes:
* the `compHom` constructors are inconsistent on whether they use `SMul.comp.smul` or reimplement its contents
* we need `SMul.comp.smul` to be instance-reducible, so that when invoked with the identity function it is instance-defeq to the original action.
As a bonus, allowing these to unify means we can have a single `SMul.comp_smul_def` lemma that works for all of the `compHom` definitions.
We could also consider changing `compHom` to take a `HomClass` in order to remove the casts entirely, which would remove the need to add these `SMul.comp` terms. This PR leaves that for possible future work, noting that in the past we have moved away from writing `def`s taking `HomClass`es.
Co-authored-by: Junye Ji <jijunye1@outlook.com>
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Refined from #38777 |
t-algebra
merge-conflict
label:t-algebra$ |
46/26 |
Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/Hom.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/End.lean,Mathlib/Algebra/Module/RingHom.lean,Mathlib/Analysis/Complex/UpperHalfPlane/MoebiusAction.lean,Mathlib/Analysis/Complex/UpperHalfPlane/ProperAction.lean,Mathlib/Topology/Algebra/Group/OpenMapping.lean |
9 |
13 |
['JJYYY-JJY', 'Vierkantor', 'eric-wieser', 'github-actions', 'leanprover-radar', 'mathlib-bors', 'mathlib-merge-conflicts'] |
nobody |
1 |
19-66079 19 days ago |
19-66080 19 days ago |
13-10860 13 days |
| 36743 |
Jun2M author:Jun2M |
feat(Combinatorics/GraphLike): introduce `GraphLike` typeclass |
Edit: There is #40204: alternative PR that uses incidence to define hypergraph.
Per discussion at ([#graph theory > HasAdj](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/HasAdj/with/575843445)), This PR introduces the `GraphLike` typeclass to capture the notions like `dart` and `walk` across various graph objects, such as `SimpleGraph`, `Graph`, and `Digraph`.
The goal is that by abstracting these core components into a typeclass, we can prove these results once for all graph-like structures rather than duplicating them across different graph types.
### Main definitions
* `GraphLike V D E Gr`: A typeclass parameterized by a vertex type `V`, dart type `D` and a graph type `Gr` (with `V`, `D` & `E` as an `outParam`).
* `GraphLike.verts : Set V`: The set of vertices of the graph.
* `GraphLike.darts : Set D`: The set of darts of the graph.
* `GraphLike.edges : Set E`: The set of edges of the graph.
* `GraphLike.Adj : V → V → Prop`: The adjacency relation, defined by default as `∃ d ∈ darts, fst d = u ∧ snd d = v`.
---
This PR generalises #35776 to also unify `Graph`.
PRs depending on this PR are
#39047 (graphLike with no multi edges) => #39050 (Digraph is graphLike)
||
V
#36829 (undirected graphLike) => #39053 (Graph is graphLike) & #39054 (Simplegraph is graphLike)
||
V
#36756 (def of walk on GraphLike) => #36971 (change Simplegraph to use GraphLike walk)
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|
t-combinatorics |
104/0 |
Mathlib.lean,Mathlib/Combinatorics/GraphLike/Basic.lean |
2 |
78 |
['IvanRenison', 'Jun2M', 'SnirBroshi', 'YaelDillies', 'github-actions', 'lauramonk', 'mathlib-merge-conflicts'] |
nobody |
1 |
19-63093 19 days ago |
65-7496 65 days ago |
116-5562 116 days |
| 39117 |
joelriou author:joelriou |
feat(CategoryTheory): the right derived functor commutes with the shift |
A few lemmas are obtained about precomposing and postcomposing left/right Kan extensions or right/left derived functors with equivalences of categories. By applying these results to the equivalences given by shifts, we construct a family of isomorphisms which shows that the right derived functor commutes with shifts, and by proving certain compatibilities, we obtain a `Functor.CommShift` instance on the right derived functor of a functor which commutes with shifts.
---
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|
t-category-theory
large-import
|
422/9 |
Mathlib.lean,Mathlib/CategoryTheory/Functor/Derived/LeftDerived.lean,Mathlib/CategoryTheory/Functor/Derived/RightDerived.lean,Mathlib/CategoryTheory/Functor/Derived/RightDerivedCommShift.lean,Mathlib/CategoryTheory/Functor/KanExtension/AdjunctionPreserves.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Shift/CommShift.lean,Mathlib/CategoryTheory/Shift/Localization.lean |
8 |
15 |
['dagurtomas', 'github-actions', 'joelriou', 'mathlib-merge-conflicts', 'robin-carlier'] |
robin-carlier assignee:robin-carlier |
1 |
19-33535 19 days ago |
19-34587 19 days ago |
34-21395 34 days |
| 40387 |
tb65536 author:tb65536 |
feat(RingTheory/Invariant/Basic): inertia subgroup of a quotient group |
This PR proves that the inertia subgroup of a quotient group is the image of the inertia subgroup.
---
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[](https://gitpod.io/from-referrer/)
|
t-ring-theory
t-algebra
label:t-algebra$ |
68/0 |
Mathlib/RingTheory/Invariant/Basic.lean |
1 |
2 |
['github-actions', 'mathlib-dependent-issues', 'xroblot'] |
nobody |
1 |
19-8311 19 days ago |
19-13012 19 days ago |
19-17015 19 days |
| 39287 |
xgenereux author:xgenereux |
feat(Localization/AtPrime/Basic): upgrade `equivQuotMaximalIdeal` to an AlgEquiv |
The definition [IsLocalization.AtPrime.equivQuotMaximalIdealPow](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/Localization/AtPrime/Basic.html#IsLocalization.AtPrime.equivQuotMaximalIdealPow) was added in #36783.
The case with `n = 1` is still important and interesting. I have upgraded it to an AlgEquiv using `equivQuotMaximalIdealPow`.
This did break a few small things, because we need to bridge back to a `RingEquiv` in some places. I took the liberty to add some missing `apply` lemmas to ease fixing these proofs.
Disclaimer: I used Claude to suggest the first shot and refined it from there.
María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)>
---
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|
t-ring-theory |
45/65 |
Mathlib/RingTheory/Localization/AtPrime/Basic.lean,Mathlib/RingTheory/Localization/AtPrime/Extension.lean,Mathlib/RingTheory/Trace/Quotient.lean |
3 |
2 |
['github-actions', 'mathlib-merge-conflicts', 'wwylele'] |
alreadydone assignee:alreadydone |
1 |
18-63990 18 days ago |
39-34316 39 days ago |
44-1208 44 days |
| 34932 |
erdOne author:erdOne |
feat(AlgebraicGeometry): formally etale morphisms |
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|
t-algebraic-geometry
merge-conflict
|
163/12 |
Mathlib.lean,Mathlib/AlgebraicGeometry/Morphisms/Etale.lean,Mathlib/AlgebraicGeometry/Morphisms/FormallyEtale.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/RingTheory/RingHom/Etale.lean |
5 |
21 |
['chrisflav', 'erdOne', 'github-actions', 'joneugster', 'mathlib-bors', 'mathlib-merge-conflicts', 'ocfnash'] |
nobody |
1 |
18-48572 18 days ago |
137-70059 137 days ago |
11-35673 11 days |
| 24965 |
erdOne author:erdOne |
refactor: Make `IsLocalHom` take unbundled map |
Under the current definition, `IsLocalHom f` and `IsLocalHom f.toMonoidHom` are not defeq, which causes quite some annoyances. We also have a consensus to not use `*HomClass` in definitions. As a result, we change `IsLocalHom` to take an unbundled function instead of a funlike.
---
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|
t-algebra
merge-conflict
label:t-algebra$ |
18/9 |
Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/AlgebraicGeometry/Scheme.lean,Mathlib/Geometry/RingedSpace/LocallyRingedSpace.lean,Mathlib/Geometry/RingedSpace/OpenImmersion.lean,Mathlib/RingTheory/LocalRing/ResidueField/Basic.lean |
5 |
19 |
['adomani', 'alreadydone', 'erdOne', 'eric-wieser', 'github-actions', 'jcommelin', 'leanprover-community-bot-assistant', 'mathlib-bors', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'vihdzp'] |
mattrobball assignee:mattrobball |
1 |
18-48570 18 days ago |
236-33903 236 days ago |
24-84527 24 days |
| 27180 |
ADedecker author:ADedecker |
feat: quotient of a monoid with zero by a multiplicative congruence |
---
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My motivation is getting a more conceptual construction of [ValuativeRel.ValueGroupWithZero](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/Valuation/ValuativeRel.html#ValuativeRel.ValueGroupWithZero), but I think this is of independent interest.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
label:t-algebra$ |
141/26 |
Mathlib.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/GroupWithZero.lean |
5 |
38 |
['ADedecker', 'eric-wieser', 'github-actions', 'mathlib-bors', 'mathlib4-merge-conflict-bot', 'ocfnash'] |
ocfnash assignee:ocfnash |
1 |
18-48569 18 days ago |
333-33469 333 days ago |
28-12053 28 days |
| 34015 |
erdOne author:erdOne |
feat(AlgebraicGeometry): category of schemes affine over a base |
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t-algebraic-geometry
merge-conflict
|
522/11 |
Mathlib.lean,Mathlib/AlgebraicGeometry/AffineOver.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/AlgebraicGeometry/Morphisms/Affine.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean,Mathlib/AlgebraicGeometry/RelativeGluing.lean,Mathlib/AlgebraicGeometry/Sites/SmallAffineZariski.lean,Mathlib/CategoryTheory/Sites/Hypercover/Subcanonical.lean |
8 |
57 |
['chrisflav', 'dagurtomas', 'erdOne', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'riccardobrasca'] |
chrisflav assignee:chrisflav |
1 |
18-48566 18 days ago |
63-35187 63 days ago |
40-35668 40 days |
| 38328 |
astrainfinita author:astrainfinita |
feat: `OrderSupSet` |
This PR introduces `OrderSupSet` and `OrderInfSet`, which are typeclasses expressing that `sSup` (resp., `sInf`) returns the least upper bound (resp., the greatest lower bound) of a set whenever one exists.
This allows us to prove properties about the `sSup` of specific sets (such as `∅`, singletons, finite sets, and `univ`) without any typeclasses asserting the existence of LUBs. For example, `sSup ∅ = ⊥` holds for any type equipped with `OrderBot` `OrderSupSet`, no longer requiring typeclasses like `ConditionallyCompleteLinearOrderBot`.
For a general set `s`, this gives a uniform way to extend results about `IsLUB s a → motive a` to `motive (sSup s)`, `motive (⨆ i, f i)`, `motive (a ⊔ b)`, etc., which allows proof reuse for basic API such as [`csSup_insert`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/ConditionallyCompleteLattice/Basic.html#csSup_insert), [`iSup_insert`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/CompleteLattice/Basic.html#iSup_insert), and [`sSup_insert`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/CompleteLattice/Basic.html#sSup_insert) and downstream code like [`csSup_add`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Group/Pointwise/CompleteLattice.html#csSup_add), [`sSup_add`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Group/Pointwise/CompleteLattice.html#sSup_add), and [`sup_add`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Group/Lattice.html#sup_add).
Furthermore, this allows us to refactor incrementally, reducing the dependency of results about various completeness typeclasses on the specific implementation of `sSup`.
---
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|
t-order |
156/73 |
Mathlib/MeasureTheory/OuterMeasure/Induced.lean,Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/Bounds/Defs.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/SetNotation.lean,Mathlib/Topology/UniformSpace/OfCompactT2.lean |
7 |
16 |
['JovanGerb', 'astrainfinita', 'b-mehta', 'github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'openendings', 'vihdzp'] |
bryangingechen assignee:bryangingechen |
1 |
17-63980 17 days ago |
64-40409 64 days ago |
69-70767 69 days |
| 38906 |
lua-vr author:lua-vr |
feat(ConditionallyCompleteLattice/Indexed): add binary versions of lemmas |
Add binary versions of some of the lemmas. Those are useful when the domain is indexed over the members of a set.
From the Carleson project.
---
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|
t-order
carleson
|
21/5 |
Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean |
1 |
19 |
['JovanGerb', 'SnirBroshi', 'github-actions', 'grunweg', 'lua-vr', 'mathlib-merge-conflicts'] |
bryangingechen assignee:bryangingechen |
1 |
17-63970 17 days ago |
54-14815 54 days ago |
63-74851 63 days |
| 39438 |
SnirBroshi author:SnirBroshi |
chore(Order/WellFounded): use `to_dual` |
Creates `argmax`/`argmaxOn` duals to the existing `argmin`/`argminOn`,
and `WellFoundedLT.min`/`WellFoundedGT.max` in order to properly dualize `WellFounded.min_le`.
Some theorems about `WellFounded{LT/GT}` which didn't have a dual before have to be renamed to make room,
e.g. `StrictMono.range_inj` is renamed to `StrictMono.range_inj_of_wellFoundedLT`.
---
This is blocking dualizing things in `ConditionallyCompleteLattice/Basic.lean`.
`WellFounded.min_le` has ~30 usages in ~10 files, so deprecating it should probably happen in a separate PR.
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|
t-order |
83/34 |
Mathlib/Data/Finset/Sort.lean,Mathlib/Order/Hom/Set.lean,Mathlib/Order/WellFounded.lean,Mathlib/SetTheory/Ordinal/Enum.lean,Mathlib/Tactic/Translate/ToDual.lean |
5 |
10 |
['JovanGerb', 'SnirBroshi', 'github-actions', 'vihdzp'] |
bryangingechen assignee:bryangingechen |
1 |
17-63960 17 days ago |
57-60241 57 days ago |
57-68487 57 days |
| 40486 |
adomani author:adomani |
chore(CI): keep the previous Lean declarations diff visible while a new build runs |
Keep the previous Lean declarations diff visible (relabelled *stale*) while a new build runs, instead of resetting the PR-summary comment to *pending* on every push.
Companion: leanprover-community/mathlib-ci#56 · details in the **Reference** / **Explanation** / **How-to** comments below.
|
CI
LLM-generated
|
21/6 |
.github/workflows/PR_summary.yml,.github/workflows/decls-diff.yml |
2 |
16 |
['SnirBroshi', 'adomani', 'bryangingechen', 'github-actions', 'mathlib-bors'] |
nobody |
1 |
17-59678 17 days ago |
17-59678 17 days ago |
17-78833 17 days |
| 39692 |
YaelDillies author:YaelDillies |
chore(Algebra/Order/BigOperators): follow the `₀` naming convention |
We have long agreed that `MonoidWithZero` lemmas corresponding to `Monoid` lemmas should be suffixed with `₀`, while currently it is the `Monoid` lemmas that are primed.
Also deprecate two primed lemmas that only differed from the unprimed versions in a minor way.
## Renames
Moves:
* `finprod_le_finprod` -> `finprod_le_finprod'`
* `finprod_le_finprod₀` -> `finprod_le_finprod`
* `Finset.prod_le_prod` -> `Finset.prod_le_prod'`
* `Finset.one_le_prod` -> `Finset.one_le_prod'`
* `Finset.prod_le_one` -> `Finset.prod_le_one'`
* `Finset.prod_le_prod_of_subset_of_one_le` -> `Finset.prod_le_prod_of_subset_of_one_le'`
* `Finset.prod_le_prod_of_subset_of_le_one` -> `Finset.prod_le_prod_of_subset_of_le_one'`
* `Finset.prod_mono_set_of_one_le` -> `Finset.prod_mono_set_of_one_le'`
* `Finset.prod_anti_set_of_le_one` -> `Finset.prod_anti_set_of_le_one'`
* `Finset.prod_le_univ_prod_of_one_le` -> `Finset.prod_le_univ_prod_of_one_le'`
* `Finset.prod_eq_one_iff_of_one_le` -> `Finset.prod_eq_one_iff_of_one_le'`
* `Finset.prod_eq_one_iff_of_le_one` -> `Finset.prod_eq_one_iff_of_le_one'`
* `Finset.single_le_prod` -> `Finset.single_le_prod'`
* `Finset.prod_fiberwise_le_prod_of_one_le_prod_fiber` -> `Finset.prod_fiberwise_le_prod_of_one_le_prod_fiber'`
* `Finset.prod_le_prod_fiberwise_of_prod_fiber_le_one` -> `Finset.prod_le_prod_fiberwise_of_prod_fiber_le_one'`
* `Finset.prod_le_prod_of_subset` -> `Finset.prod_le_prod_of_subset'`
* `Finset.prod_mono_set` -> `Finset.prod_mono_set'`
* `Finset.prod_le_prod_of_ne_one` -> `Finset.prod_le_prod_of_ne_one'`
* `Finset.prod_lt_prod` -> `Finset.prod_lt_prod'`
* `Finset.prod_lt_prod_of_nonempty` -> `Finset.prod_lt_prod_of_nonempty'`
* `Finset.prod_lt_prod_of_subset` -> `Finset.prod_lt_prod_of_subset'`
* `Finset.single_lt_prod` -> `Finset.single_lt_prod'`
* `Finset.exists_lt_of_prod_lt` -> `Finset.exists_lt_of_prod_lt'`
* `Finset.exists_le_of_prod_le` -> `Finset.exists_le_of_prod_le'`
* `Finset.exists_one_lt_of_prod_one_of_exists_ne_one` -> `Finset.exists_one_lt_of_prod_one_of_exists_ne_one'`
* `Fintype.prod_mono` -> `Fintype.prod_mono'`
* `Fintype.prod_strictMono` -> `Fintype.prod_strictMono'`
* `List.Forall₂.prod_le_prod` -> `List.Forall₂.prod_le_prod'`
* `List.Sublist.prod_le_prod` -> `List.Sublist.prod_le_prod'`
* `List.SublistForall₂.prod_le_prod` -> `List.SublistForall₂.prod_le_prod'`
* `List.prod_le_prod` -> `List.prod_le_prod'`
* `List.prod_lt_prod` -> `List.prod_lt_prod'`
* `List.exists_lt_of_prod_lt` -> `List.exists_lt_of_prod_lt'`
* `List.exists_le_of_prod_le` -> `List.exists_le_of_prod_le'`
* `Multiset.prod_lt_prod` -> `Multiset.prod_lt_prod'`
* `Multiset.prod_lt_prod_of_nonempty` -> `Multiset.prod_lt_prod_of_nonempty'`
* `Finset.prod_le_prod₀` -> `Finset.prod_le_prod`
* `Finset.prod_le_one₀` -> `Finset.prod_le_one`
* `Finset.one_le_prod₀` -> `Finset.one_le_prod`
* `Finset.prod_le_prod_of_subset_of_one_le₀` -> `Finset.prod_le_prod_of_subset_of_one_le`
* `Finset.prod_le_prod_of_subset_of_le_one₀` -> `Finset.prod_le_prod_of_subset_of_le_one`
* `Finset.prod_mono_set_of_one_le₀` -> `Finset.prod_mono_set_of_one_le`
* `Finset.prod_anti_set_of_le_one₀` -> `Finset.prod_anti_set_of_le_one`
* `Finset.prod_lt_prod₀` -> `Finset.prod_lt_prod`
* `Finset.prod_lt_prod_of_nonempty₀` -> `Finset.prod_lt_prod_of_nonempty`
## Deprecations
* `Finset.sum_nonneg'`, `Finset.one_le_prod''`
[Zulip](https://leanprover.zulipchat.com/#narrow/channel/345428-mathlib-reviewers/topic/The.20.E2.82.80.20suffix/with/604912624)
---
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|
t-algebra
t-order
awaiting-zulip
label:t-algebra$ |
283/219 |
Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/Group/Submonoid/Pointwise.lean,Mathlib/Algebra/Order/BigOperators/Group/Finset.lean,Mathlib/Algebra/Order/BigOperators/Group/List.lean,Mathlib/Algebra/Order/BigOperators/Group/Multiset.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/Finset.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/BoxIntegral/DivergenceTheorem.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Complex/JensenFormula.lean,Mathlib/Analysis/InnerProductSpace/Orientation.lean,Mathlib/Analysis/InnerProductSpace/Subspace.lean,Mathlib/Analysis/Normed/Ring/Basic.lean,Mathlib/Analysis/Normed/Ring/InfiniteProd.lean,Mathlib/Analysis/ODE/DiscreteGronwall.lean,Mathlib/Analysis/Polynomial/MahlerMeasure.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/Extremal.lean,Mathlib/Analysis/SpecificLimits/Basic.lean,Mathlib/MeasureTheory/Constructions/Pi.lean,Mathlib/MeasureTheory/Measure/HasOuterApproxClosedProd.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Measure/Lebesgue/VolumeOfBalls.lean,Mathlib/NumberTheory/Bertrand.lean,Mathlib/NumberTheory/Height/Basic.lean,Mathlib/NumberTheory/Height/MvPolynomial.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Basic.lean,Mathlib/NumberTheory/Primorial.lean,Mathlib/NumberTheory/SelbergSieve.lean,Mathlib/NumberTheory/SiegelsLemma.lean,Mathlib/NumberTheory/SmoothNumbers.lean,Mathlib/Probability/ProductMeasure.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Eval.lean,Mathlib/Topology/Algebra/InfiniteSum/ENNReal.lean,Mathlib/Topology/Algebra/InfiniteSum/Order.lean |
35 |
11 |
['Vierkantor', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'vihdzp'] |
Vierkantor assignee:Vierkantor |
1 |
17-6983 17 days ago |
17-8649 17 days ago |
14-59520 14 days |
| 39759 |
plp127 author:plp127 |
chore(FieldTheory/KrullTopology): move lemmas to earlier file |
We move some lemmas unrelated to the Krull topology out of the `KrullTopology` file. They are placed in the earlier file `FieldTheory/IsGalois/Basic` instead.
---
In #23693 it is said that
> The proof of it uses some results in this file, so it can't be put into earlier files.
This is no longer true, so we want move it out of the `KrullTopology` file because the theorems have nothing to do with the Krull topology. I found that they can go in `FieldTheory/IsGalois/Basic` without modifying the proofs. They cannot go any earlier because the statement of the theorems contains `IsGalois`, which is defined in this file.
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t-algebra label:t-algebra$ |
59/68 |
Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/KrullTopology.lean |
2 |
5 |
['acmepjz', 'github-actions', 'grunweg', 'plp127', 'vihdzp'] |
ocfnash assignee:ocfnash |
1 |
16-63979 16 days ago |
49-76986 49 days ago |
49-76636 49 days |
| 39868 |
JuanCoRo author:JuanCoRo |
feat(Algebra/Polynomial): linearity of `divByMonic` and adjacent results |
---
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This PR adds the `R`-linearity of the monic polynomial division map `_ /ₘ q`. It also adds adjacent results that stem from this work.
#### Refactors:
- Reuses the proofs from `add_modByMonic` and `smul_modByMonic` to generalize these results to `add_div_modByMonic` and `smul_div_modByMonic` respectively.
- Replaces the proofs of `add_modByMonic` and `smul_modByMonic` as specializations of the more general theorems `add_div_modByMonic` and `smul_div_modByMonic` respectively.
#### Additions:
- Adds the necessary results for `_ /ₘ q` linearity:
- `add_divByMonic : (p₁ + p₂) /ₘ q = p₁ /ₘ q + p₂ /ₘ q`
- `smul_divByMonic : c • p /ₘ q = c • (p /ₘ q)`
- Adds `_ /ₘ q` as an `R`-linear map:
- `divByMonicHom`: definition of `_ /ₘ q` as a linear map
- `mem_ker_divByMonic`: kernel characterization for `_ /ₘ q`.
- In `Div.lean` adds dual results for `/ₘ` that were already present for `%ₘ`
- `neg_divByMonic : (-p) /ₘ q = -(p /ₘ q)`
- `sub_divByMonic : (p₁ - p₂) /ₘ q = p₁ /ₘ q - p₂ /ₘ q`
- `mul_divByMonic_assoc (hd : q ∣ p₂) : (p₁ * p₂) /ₘ q = p₁ * (p₂ /ₘ q)`
While `mul_divByMonic_assoc` is not exactly the dual of `mul_modByMonic`, I thought it wouldn't hurt to add it.
[](https://gitpod.io/from-referrer/) |
new-contributor
t-algebra
label:t-algebra$ |
54/17 |
Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/RingDivision.lean |
2 |
8 |
['JuanCoRo', 'github-actions', 'wwylele'] |
ocfnash assignee:ocfnash |
1 |
16-63964 16 days ago |
44-26353 44 days ago |
44-26082 44 days |
| 36605 |
martinwintermath author:martinwintermath |
feat(Geometry/Convex/Cone): Add lemmas about interaction of hull, span and negation |
Prove lemmas about the interaction of hull, span and negation.
Main additions:
* `PointedCone.toSubmodule` that produces a submodule with the same support given that `-C = C`. Also the corresponding `CanLift`
* `PointedCone.hull_neg_pair_eq_span_singleton` proving `hull R {-x, x} = R ∙ x` (simp lemma)
* `PointedCone.span_eq_hull_neg_sup_hull` proving `span R s = hull R (-s) ⊔ hull R s`
* `PointedCone.mem_span` proving `x ∈ span R C ↔ ∃ p, n ∈ C, x = p - n`
Considerations: there are several ways to express that a convex cone is a submodule:
* `-C = C`
* `-C ≤ C` or `C ≤ -C`
* `C = span R C`
* `C = C.lineal`
The consensus was that the the first option is the most direct way to express this property, which then allows to lift to a submodule.
Co-authored by: Olivia Röhrig, Kilian Rueß, Artie Khovanov
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[](https://gitpod.io/from-referrer/)
|
t-convex-geometry |
65/0 |
Mathlib/Geometry/Convex/Cone/Pointed.lean |
1 |
74 |
['YaelDillies', 'artie2000', 'github-actions', 'martinwintermath', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] |
YaelDillies assignee:YaelDillies |
1 |
15-1034 15 days ago |
47-79996 47 days ago |
64-80252 64 days |
| 38223 |
Deicyde author:Deicyde |
feat(Geometry/Manifold): add `MfldCat`, the category of `C^n` manifolds |
We define `MfldCat 𝕜 n`: the category of `C^n` manifolds over a field `𝕜`, following the pattern of `TopCat` in
`Mathlib.Topology.Category.TopCat.Basic`. We also implement `HasForget₂ (MfldCat 𝕜 n) TopCat`—the forgetful functor into the category of topological spaces. For more discussion see the Zulip thread: [#PR reviews > #38223 The Category of C^n Manifolds](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2338223.20The.20Category.20of.20C.5En.20Manifolds/with/587038032)
Also added: `ContMDiffMap.id_apply`, `.coe_id` and `.coe_comp` which are comparable to `ContinuousMap` API.
### Future work
- ✅ Define a Monoidal structure via product manifolds, analogous to `Manifold.Topology.Category.TopCat.Monoidal` #38560
- ✅ Define the tangent functor: `M ↦ TM`, `F ↦ F.tangentMap` from `MfldCat (n+1) 𝕜` to `MfldCat n 𝕜` #38270
- Functor `FGModuleCat 𝕜 ⥤ MfldCat 𝕜 n` sending a finite-dimensional `𝕜`-vector space to the manifold modeled on itself. Left as `TODO`.
- Define `FGModuleCat 𝕜` as an enriched category over `MfldCat n 𝕜`. Then _smooth functors_ can be realized as endofunctors on the enriched category. This is the main motivation for this construction.
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- [ ] depends on: #41109 [The category of `C^n` manifolds on a fixed model]
[](https://gitpod.io/from-referrer/)
|
t-differential-geometry
new-contributor
t-category-theory
awaiting-author
blocked-by-other-PR
|
224/0 |
Mathlib.lean,Mathlib/Geometry/Manifold/Category/MfldCat/Basic.lean,Mathlib/Geometry/Manifold/ContMDiffMap.lean |
3 |
60 |
['Deicyde', 'chrisflav', 'dagurtomas', 'github-actions', 'idontgetoutmuch', 'mathlib-dependent-issues', 'peabrainiac'] |
joelriou assignee:joelriou |
1 |
14-81755 14 days ago |
19-4747 19 days ago |
59-40239 59 days |
| 40915 |
felixpernegger author:felixpernegger |
chore: remove (all) instances of `simp; infer_instance` |
Removes some exceptions for `linter.flexible`; these are all occurences of this pattern (including multi-line).
See also the reviews at #40883
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[](https://gitpod.io/from-referrer/)
|
awaiting-author
tech debt
|
9/11 |
Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean |
2 |
4 |
['eric-wieser', 'github-actions', 'themathqueen'] |
nobody |
1 |
14-2705 14 days ago |
17-7038 17 days ago |
2-59119 2 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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[](https://gitpod.io/from-referrer/)
|
t-combinatorics
new-contributor
|
199/0 |
Mathlib.lean,Mathlib/Combinatorics/SetFamily/DualVC.lean,docs/references.bib |
3 |
42 |
['Shreyas4991', 'YaelDillies', 'Zetetic-Dhruv', 'github-actions'] |
nobody |
1 |
13-63065 13 days ago |
63-75711 63 days ago |
80-36010 80 days |
| 41086 |
erdOne author:erdOne |
feat(RingTheory): etale lifting property of henselian local rings |
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[](https://gitpod.io/from-referrer/)
|
t-ring-theory
large-import
awaiting-author
|
476/19 |
Mathlib.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/LinearAlgebra/Dimension/Free.lean,Mathlib/RingTheory/Henselian.lean,Mathlib/RingTheory/IdempotentInstances.lean,Mathlib/RingTheory/Idempotents.lean,Mathlib/RingTheory/LocalRing/RingHom/IsIntegral.lean |
7 |
36 |
['chrisflav', 'faenuccio', 'github-actions'] |
faenuccio assignee:faenuccio |
1 |
12-5563 12 days ago |
12-5628 12 days ago |
3-46413 3 days |
| 41213 |
tb65536 author:tb65536 |
chore(GroupTheory/Torsion): rename `IsTorsion` to `IsMulTorsion` |
`GroupTheory/Torsion.lean` has some bad to_additive translations. This PR fixes this by renaming `Monoid.IsTorsion` to `IsMulTorsion` and `AddMonoid.IsTorsion` to `IsAddTorsion`. This also aligns better with `IsMulTorsionFree` and `IsAddTorsionFree`.
This PR has a lot of deprecations, but you can check the lean-aware declarations diff to make sure I didn't miss anything.
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[](https://gitpod.io/from-referrer/)
|
t-algebra
t-group-theory
label:t-algebra$ |
177/96 |
Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/GroupTheory/FiniteAbelian/Basic.lean,Mathlib/GroupTheory/Torsion.lean |
3 |
36 |
['Multramate', 'github-actions', 'tb65536'] |
Multramate assignee:Multramate |
1 |
11-13272 11 days ago |
11-14209 11 days ago |
11-32322 11 days |
| 37346 |
euprunin author:euprunin |
chore: golf using `grind` |
The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective.
Trace profiling results (differences <30 ms considered measurement noise):
* `✅️ SimpleGraph.Walk.IsPath.getVert_injOn`: unchanged 🎉
* `✅️ SimpleGraph.Walk.length_bypass_le`: unchanged 🎉
* `✅️ Rat.floor_intCast_div_natCast`: unchanged 🎉
* `✅️ InnerProductGeometry.norm_eq_of_angle_sub_eq_angle_sub_rev_of_angle_ne_pi`: unchanged 🎉
* `✅️ padicNorm.zero_of_padicNorm_eq_zero`: unchanged 🎉
Profiled using `set_option trace.profiler true in`.
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|
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 |
1 |
11-8970 11 days ago |
74-23418 74 days ago |
30-49603 30 days |
| 39720 |
vihdzp author:vihdzp |
feat: cofinality within order |
We introduce `Order.cofWithin x = Order.cof (Iio x)` for the cofinality of an element within a preorder. This generalizes `Ordinal.cof`, with the caveat that `cof o : Cardinal.{u}` for `o : Ordinal.{u}`, whereas `cofWithin o : Cardinal.{u + 1}`.
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|
t-set-theory
awaiting-author
|
104/14 |
Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Cofinality/Basic.lean,Mathlib/SetTheory/Cardinal/Cofinality/Ordinal.lean |
3 |
13 |
['SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-merge-conflicts', 'ocfnash', 'vihdzp'] |
nobody |
1 |
11-3604 11 days ago |
12-10841 12 days ago |
38-63310 38 days |
| 36376 |
jessealama author:jessealama |
feat(SimpleGraph): hamiltonian cycle from cyclic permutation |
This PR provides `IsHamiltonian.of_perm`, a bridge from `Equiv.Perm.IsCycle` to `SimpleGraph.IsHamiltonian`: if σ is a permutation that is a single cycle with full support on at least 3 elements, and each step `v → σ v` is an edge of `G`, then `G` is Hamiltonian.
### New definitions and lemmas
**`Mathlib/Data/List/Chain.lean`**:
- `IsChain.iterate`: `List.iterate f a n` is a chain under `r` whenever `r a (f a)` holds for all `a`
**`Mathlib/Data/List/Iterate.lean`**:
- `getLast_iterate`: the last element of `List.iterate f a n` is `f^[n - 1] a`
**`Mathlib/Combinatorics/SimpleGraph/Walk/Iterate.lean`** (new file):
- `Walk.iterate`: builds a walk of length `n` from `x` to `f^[n] x` for any function `f` with `G.Adj x (f x)` for all `x`, defined via `Walk.ofSupport`
- `Walk.length_iterate`, `Walk.support_iterate`, `Walk.edges_iterate`: basic API
**`Mathlib/GroupTheory/Perm/Cycle/Basic.lean`**:
- `IsCycleOn.injOn_pow_apply`: the map `n ↦ (f ^ n) a` is injective on `Finset.range #s`
**`Mathlib/GroupTheory/Perm/Cycle/Concrete.lean`**:
- `IsCycleOn.injOn_sym2_pow_apply`: the unordered-pair edge map `k ↦ s((f ^ k) a, (f ^ (k + 1)) a)` is injective on `[0, #s)` when `#s ≠ 2`
- `IsCycleOn.sym2_pow_apply_ne`: edge distinctness for cycle-on permutations — `s((f ^ k) a, (f ^ (k + 1)) a) ≠ s(a, f a)` when `k ≠ 0`, `k < #s`, and `#s ≠ 2`
- `Perm.toList_eq_range_map_pow`: expresses `toList` as a range map over powers
**`Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean`**:
- `cons_isHamiltonianCycle_iff`: a Hamiltonian path closed by an edge outside its support is a Hamiltonian cycle, and conversely
- `IsHamiltonian.of_perm`: the main theorem
---
- [x] depends on: #36307
- [ ] depends on: #35255
- [ ] depends on: #34799
|
t-combinatorics
awaiting-author
blocked-by-other-PR
|
182/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian/Perm.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Iterate.lean,Mathlib/Data/List/Chain.lean,Mathlib/Data/List/Iterate.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean |
8 |
88 |
['SnirBroshi', 'YaelDillies', 'faenuccio', 'github-actions', 'jessealama', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vlad902'] |
b-mehta assignee:b-mehta |
1 |
10-82393 10 days ago |
27-39654 27 days ago |
71-22971 71 days |
| 34440 |
grunweg author:grunweg |
feat: linter for name components in uppercase |
Per the naming convention, these are errors (unless they are an abbreviation).
Mathlib has *many* violations at the moment: for this reason, we add this as an environment linter
and automatically add all current exceptions. Once these have been fixed, converting to a syntax linter
is desirable.
Until then, track the number of such exceptions as technical debt.
---
[Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/naming.20convention.20linter/with/570617527)
Note to self: wait for CI, then do a final nolints update. and try to implement the follow-up soon
#40977 is also rolled into this linter now: TODO update PR description!
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|
t-linter
awaiting-author
awaiting-CI
|
1082/23 |
Mathlib/Init.lean,Mathlib/Tactic/Linter/Style.lean,MathlibTest/Linter/DoubleUnderscore.lean,MathlibTest/Linter/TextBased.lean,scripts/nolints.json |
5 |
30 |
['Vierkantor', 'github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts'] |
nobody |
1 |
10-71448 10 days ago |
144-34477 144 days ago |
13-82065 13 days |
| 31892 |
jsm28 author:jsm28 |
feat(Geometry/Euclidean/Sphere/PolePolar): poles and polars |
Define poles and polars for spheres in Euclidean affine spaces, and set up some basic API, including in particular La Hire's theorem (`p₁` lies on the polar of `p₂` if and only if `p₂` lies on the polar of `p₁`).
Poles and polars are actually meaningful for any quadric in a projective space over any field, but I think it's reasonable to set up this theory for spheres in the Euclidean context and potentially link it in future to more general projective geometry.
---
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[](https://gitpod.io/from-referrer/)
|
t-euclidean-geometry |
158/0 |
Mathlib.lean,Mathlib/Geometry/Euclidean/Sphere/PolePolar.lean |
2 |
10 |
['Parcly-Taxel', 'github-actions', 'jsm28', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'wwylele'] |
nobody |
2 |
10-60104 10 days ago |
10-60913 10 days ago |
107-925 107 days |
| 40660 |
jcommelin author:jcommelin |
chore(Algebra/Module/Submodule): rename variables |
This PR renames variables in `Algebra/Module/Submodule/Map.lean`.
The entire patch is trivial modulo alpha-equivalence and to comments.
---
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|
t-algebra
merge-conflict
label:t-algebra$ |
143/140 |
Mathlib/Algebra/Module/Submodule/Map.lean |
1 |
11 |
['github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'riccardobrasca', 'themathqueen'] |
nobody |
1 |
10-23121 10 days ago |
24-41976 24 days ago |
0-73 1 minute |
| 37562 |
IvanRenison author:IvanRenison |
feat(Combinatorics/SimpleGraph): add several lemmas about when `Walk.bypass` and `Walk.cycleBypass` do nothing |
Co-authored-by: Vlad Tsyrklevich <vlad@tsyrklevi.ch>
---
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[](https://gitpod.io/from-referrer/)
|
t-combinatorics
merge-conflict
awaiting-author
|
43/0 |
Mathlib/Combinatorics/SimpleGraph/Paths.lean |
1 |
20 |
['IvanRenison', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'ocfnash', 'vlad902'] |
nobody |
2 |
10-8913 10 days ago |
11-61404 11 days ago |
19-82047 19 days |
| 37870 |
Jun2M author:Jun2M |
feat(Combinatorics/Graph): `Simple` typeclass for `Graph` |
This PR introduces two type classes on `Graph`: `Loopless` and `Simple`.
---
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|
t-combinatorics
awaiting-author
|
141/0 |
Mathlib.lean,Mathlib/Combinatorics/Graph/Simple.lean |
2 |
8 |
['Jun2M', 'YaelDillies', 'b-mehta', 'github-actions', 'madvorak', 'mathlib-merge-conflicts', 'ocfnash'] |
nobody |
2 |
9-75522 9 days ago |
10-6674 10 days ago |
82-1363 82 days |
| 38612 |
SnirBroshi author:SnirBroshi |
feat(Order/SuccPred/CompleteLinearOrder): `sSup s < x` iff theorems when we know if `x` is a successor pre-limit or not |
Adds the following theorems (along with their duals and indexed versions):
```lean
sSup_lt_iff_of_not_isSuccPrelimit : ¬IsSuccPrelimit x → sSup s < x ↔ ∀ a ∈ s, a < x
le_sSup_iff_of_not_isSuccPrelimit : ¬IsSuccPrelimit x → x ≤ sSup s ↔ ∃ a ∈ s, x ≤ a
Order.IsSuccPrelimit.sSup_lt_iff : IsSuccPrelimit x → sSup s < x ↔ ∃ a < x, ∀ b ∈ s, b < a
Order.IsSuccPrelimit.le_sSup_iff : IsSuccPrelimit x → x ≤ sSup s ↔ ∀ a < x, ∃ b ∈ s, a ≤ b
```
They are similar to these existing theorems, but not the same:
```lean
sSup_lt_iff : sSup s < x ↔ ∃ a < x, ∀ b ∈ s, b ≤ a
le_sSup_iff_forall_lt : x ≤ sSup s ↔ ∀ a < x, ∃ b ∈ s, a < b
```
---
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|
t-order |
43/0 |
Mathlib/Order/SuccPred/CompleteLinearOrder.lean |
1 |
6 |
['SnirBroshi', 'github-actions', 'vihdzp'] |
nobody |
1 |
9-63051 9 days ago |
40-801 40 days ago |
75-37248 75 days |
| 38830 |
Jun2M author:Jun2M |
feat(Data/List): Nodup and head & getLast lemmas |
Given a Nodup list:
* If a prefix contains the last element, they are equal
* If a suffix contains the first element, they are equal
* If an infix contains the first element, it is a prefix
* If an infix contains the last element, it is a suffix
* If the first and the last element are the same, it is a singleton
* `countP` is cardinality of the filter of `toFinset`.
---
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|
t-data
awaiting-author
|
32/0 |
Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/List/Nodup.lean |
3 |
17 |
['Jun2M', 'SnirBroshi', 'b-mehta', 'github-actions', 'joneugster', 'mathlib-merge-conflicts', 'ocfnash'] |
joneugster assignee:joneugster |
1 |
9-38101 9 days ago |
11-16297 11 days ago |
47-28078 47 days |
| 32282 |
jsm28 author:jsm28 |
feat(Geometry/Euclidean/Angle/Incenter): unoriented angle bisection |
Add lemmas giving unoriented angles involving the incenter and excenters of a triangle as expressions involving dividing angles of the triangle by 2, deduced from oriented bisection lemmas.
---
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- [ ] depends on: #30982
- [ ] depends on: #31205
- [ ] depends on: #32019
- [ ] depends on: #32021
- [ ] depends on: #32259
- [ ] depends on: #32260
- [ ] depends on: #32270
- [ ] depends on: #32273
- [ ] depends on: #32278
[](https://gitpod.io/from-referrer/)
|
t-euclidean-geometry |
92/0 |
Mathlib/Geometry/Euclidean/Angle/Incenter.lean |
1 |
19 |
['felixpernegger', 'github-actions', 'jsm28', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'wwylele'] |
nobody |
1 |
9-28789 9 days ago |
9-29081 9 days ago |
106-82307 106 days |
| 34633 |
mitchell-horner author:mitchell-horner |
feat(Combinatorics/SimpleGraph): define the Zarankiewicz function |
Defines the Zarankiewicz function $z(m, n; s, t)$ in terms of bipartite graphs.
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This comes from splitting up #25841 into smaller PRs.
[](https://gitpod.io/from-referrer/)
|
t-combinatorics
maintainer-merge
|
164/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Zarankiewicz.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean |
3 |
30 |
['SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mitchell-horner'] |
nobody |
1 |
9-18177 9 days ago |
28-50646 28 days ago |
107-81004 107 days |
| 33143 |
wwylele author:wwylele |
feat(PowerSeries): pentagonal number theorem |
The proof is split in two files: `Mathlib/Combinatorics/Enumerative/Ring.lean` for the algebraic part, and `Mathlib/Combinatorics/Enumerative/PowerSeries.lean` for the summability part. In the near future, I also plan to prove the real/complex version that branches off from the algebraic part.
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[](https://gitpod.io/from-referrer/)
|
t-combinatorics
file-removed
maintainer-merge
|
360/7 |
Mathlib.lean,Mathlib/Combinatorics/Enumerative/Pentagonal/Basic.lean,Mathlib/Combinatorics/Enumerative/Pentagonal/PowerSeries.lean,Mathlib/Combinatorics/Enumerative/Pentagonal/Ring.lean,Mathlib/RingTheory/Nilpotent/Basic.lean,docs/1000.yaml |
6 |
110 |
['YaelDillies', 'copilot-pull-request-reviewer', 'github-actions', 'jcommelin', 'mathlib-dependent-issues', 'tb65536', 'themathqueen', 'urkud', 'vihdzp', 'wwylele'] |
nobody |
1 |
9-8399 9 days ago |
9-12620 9 days ago |
181-5133 181 days |
| 41314 |
Scarlett-le author:Scarlett-le |
feat(Geometry/Euclidean/Angle/Sphere): central angle equals π iff diameter, 0 iff equal points |
Add two lemmas characterising the two degenerate values of the central angle
`∠ p₁ s.center p₂` on a sphere of nonzero radius:
* `EuclideanGeometry.Sphere.angle_center_eq_pi_iff_isDiameter`: the central angle
is `π` iff `p₁` and `p₂` are the endpoints of a diameter (`s.IsDiameter p₁ p₂`).
* `EuclideanGeometry.Sphere.angle_center_eq_zero_iff_eq`: the central angle is `0`
iff `p₁ = p₂`. |
t-euclidean-geometry |
20/0 |
Mathlib/Geometry/Euclidean/Angle/Sphere.lean |
1 |
1 |
['github-actions', 'wwylele'] |
jsm28 assignee:jsm28 |
1 |
8-63991 8 days ago |
9-35660 9 days ago |
9-35310 9 days |
| 40782 |
tb65536 author:tb65536 |
feat(Combinatorics/SimpleGraph/Coloring/EdgeLabeling): add predicates for monochromatic subsets |
This PR adds predicates for monochromatic subsets, in preparation for Ramsey theory.
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[](https://gitpod.io/from-referrer/)
|
t-combinatorics |
143/0 |
Mathlib/Combinatorics/SimpleGraph/Coloring/EdgeLabeling.lean |
1 |
26 |
['SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'tb65536'] |
nobody |
1 |
7-5860 7 days ago |
7-76790 7 days ago |
20-35280 20 days |
| 41338 |
kim-em author:kim-em |
refactor(Combinatorics/SimpleGraph/CycleGraph): golf cycleGraph_isContained_iff via getVert |
Reopened from my fork, replacing #41268 (previously a branch on the main repo).
This PR rewrites the reverse direction of `cycleGraph_isContained_iff` from https://github.com/leanprover-community/mathlib4/pull/35255. Building the copy on `Walk.getVert` instead of `support` indexing makes the vertex map total, dispatches both adjacency cases through a single cyclic-successor helper (no `wlog`), handles the wraparound with `adj_penultimate`, and gets injectivity directly from `IsCycle.getVert_injOn'`.
🤖 Prepared with Claude Code |
t-combinatorics
LLM-generated
|
14/20 |
Mathlib/Combinatorics/SimpleGraph/CycleGraph.lean |
1 |
11 |
['SnirBroshi', 'github-actions', 'kim-em', 'vlad902'] |
nobody |
2 |
5-81313 5 days ago |
8-43017 8 days ago |
8-43094 8 days |
| 39722 |
kg583 author:kg583 |
feat(Combinatorics): link `Nat.Partition` to `YoungDiagram` |
---
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AI disclosure: Claude was used to source some proof sketches.
[](https://gitpod.io/from-referrer/)
|
t-combinatorics
new-contributor
large-import
|
111/4 |
Mathlib.lean,Mathlib/Combinatorics/Enumerative/Partition/Basic.lean,Mathlib/Combinatorics/Enumerative/Partition/YoungDiagram.lean,Mathlib/Combinatorics/Young/YoungDiagram.lean |
4 |
48 |
['NoahW314', 'YaelDillies', 'github-actions', 'kg583', 'wwylele'] |
YaelDillies assignee:YaelDillies |
2 |
5-79676 5 days ago |
5-79676 5 days ago |
40-74243 40 days |
| 39110 |
SnirBroshi author:SnirBroshi |
chore(Data/Set): reduce defeq abuse of `Set α = α → Prop` |
These are among the first places that would fail if `Set α` wasn't defeq to `α → Prop`.
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[](https://gitpod.io/from-referrer/)
|
t-data |
35/20 |
Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Defs.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Order/BooleanAlgebra/Set.lean |
5 |
26 |
['SnirBroshi', 'Vierkantor', 'github-actions', 'leanprover-radar', 'mathlib-bors', 'mathlib-merge-conflicts', 'themathqueen', 'urkud', 'vihdzp'] |
TwoFX assignee:TwoFX |
1 |
5-78569 5 days ago |
5-81708 5 days ago |
63-31674 63 days |
| 37603 |
Parcly-Taxel author:Parcly-Taxel |
refactor: review of `SetSemiring` |
* Rename `Set.up` and `SetSemiring.down` to `SetSemiring.ofSet` and `SetSemiring.toSet` respectively. Unprotect both and make them equivalences, following `FreeMonoid`.
* Derive `CompleteAtomicBooleanAlgebra` for `SetSemiring` immediately.
* Add `imageHom_id` and `imageHom_comp`. The three existing lemmas about `imageHom` are coalesced into `imageHom_apply`.
Ultimately inspired by https://github.com/leanprover-community/mathlib4/pull/36934#issuecomment-4183475568. |
t-data |
119/164 |
Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Data/Set/Semiring.lean |
2 |
44 |
['Parcly-Taxel', 'YaelDillies', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'ocfnash', 'sgouezel'] |
nobody |
1 |
5-67790 5 days ago |
5-69846 5 days ago |
33-84819 33 days |
| 41308 |
sergantche author:sergantche |
feat: add `List.insertIdx_eraseIdx_getElem_perm` |
Adds `List.insertIdx_eraseIdx_getElem_perm`, showing that erasing an element by index and inserting it at any valid position gives a permutation of the original list.
This packages the existing lemmas `List.perm_insertIdx` and `List.getElem_cons_eraseIdx_perm` into a direct API lemma.
AI assistance was used in preparing this PR; I reviewed the statement and proof.
[](https://gitpod.io/from-referrer/) |
t-data
new-contributor
|
5/0 |
Mathlib/Data/List/Perm/Basic.lean |
1 |
4 |
['github-actions', 'sergantche', 'vlad902'] |
nobody |
1 |
5-66942 5 days ago |
5-64189 5 days ago |
4-3395 4 days |
| 38483 |
jessealama author:jessealama |
feat(Algebra): finset sums of antiperiodic functions |
Two lemmas on `Finset` sums of `Function.Antiperiodic` functions, in the new file `Mathlib.Algebra.BigOperators.Periodic`: `sum_Ico_shift`, that shifting a sum over `[a, b)` by the antiperiod negates it; and `sum_Ico_mul_shift`, the analogue for a sum weighted by an antiperiodic function. Spun off from #29713 (Euler-Poincaré formula).
|
t-algebra
awaiting-author
label:t-algebra$ |
49/0 |
Mathlib.lean,Mathlib/Algebra/BigOperators/Periodic.lean |
2 |
19 |
['github-actions', 'j-loreaux', 'jessealama', 'mathlib-splicebot', 'themathqueen', 'wwylele'] |
themathqueen assignee:themathqueen |
1 |
5-29534 5 days ago |
10-4317 10 days ago |
58-22139 58 days |
| 41208 |
tb65536 author:tb65536 |
chore(FieldTheory/Galois/IsGaloisGroup): remove FaithfulSMul assumptions |
A few results in IsGaloisGroup.lean are proved by passing to fraction fields which requires assuming FaithfulSMul. This PR removes the FaithfulSMul assumption by first passing to the image subring.
---
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[](https://gitpod.io/from-referrer/)
|
t-ring-theory
t-algebra
label:t-algebra$ |
28/29 |
Mathlib/FieldTheory/Galois/IsGaloisGroup.lean,Mathlib/NumberTheory/RamificationInertia/Galois.lean,Mathlib/RingTheory/IsGaloisGroup/Basic.lean |
3 |
1 |
['Whysoserioushah', 'github-actions'] |
nobody |
1 |
5-29126 5 days ago |
11-79296 11 days ago |
11-78947 11 days |
| 40735 |
tb65536 author:tb65536 |
feat(NumberTheory/NumberField/AdeleRing): define the idele class group |
This PR defines the idele class group and the maps from the completions at finite places. This will be used to define Hecke L-Functions.
---
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[](https://gitpod.io/from-referrer/)
|
t-number-theory
t-algebra
label:t-algebra$ |
82/5 |
Mathlib/NumberTheory/NumberField/AdeleRing.lean,Mathlib/NumberTheory/NumberField/InfiniteAdeleRing.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/RestrictedProduct/Basic.lean |
4 |
4 |
['github-actions', 'smmercuri'] |
riccardobrasca assignee:riccardobrasca |
1 |
4-63980 4 days ago |
24-75790 24 days ago |
24-75441 24 days |
| 35296 |
Rida-Hamadani author:Rida-Hamadani |
feat(SimpleGraph): taking or dropping from a cycle results in a path |
---
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|
t-combinatorics
maintainer-merge
|
13/0 |
Mathlib/Combinatorics/SimpleGraph/Paths.lean |
1 |
4 |
['YaelDillies', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
1 |
4-41225 4 days ago |
4-73229 4 days ago |
4-74263 4 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 |
1 |
4-29031 4 days ago |
5-5409 5 days ago |
67-55542 67 days |
| 31135 |
kckennylau author:kckennylau |
feat(RingTheory): is localization iff is localization on saturation |
In this PR we show that `A` is a localization of `R` on the submonoid `S` iff it is so on the saturation of `S`.
Crucially, the saturation of `S` is precisely the elements that become a unit in `A`.
---
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|
t-ring-theory |
53/0 |
Mathlib.lean,Mathlib/RingTheory/Localization/Saturation.lean |
2 |
20 |
['alreadydone', 'chrisflav', 'github-actions', 'kckennylau', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'riccardobrasca'] |
chrisflav and joneugster assignee:joneugster assignee:chrisflav |
1 |
4-28716 4 days ago |
4-29269 4 days ago |
51-29065 51 days |
| 31361 |
alreadydone author:alreadydone |
feat(Algebra/Order): convex subgroups |
---
- [x] depends on: #32886
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|
t-algebra
t-order
awaiting-author
label:t-algebra$ |
342/0 |
Mathlib.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/Group/Convex.lean,Mathlib/Order/Birkhoff.lean,Mathlib/Order/Quotient.lean |
5 |
100 |
['Vierkantor', 'YaelDillies', 'alreadydone', 'b-mehta', 'faenuccio', 'github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vihdzp', 'wwylele'] |
faenuccio assignee:faenuccio |
1 |
4-24535 4 days ago |
5-68783 5 days ago |
57-52008 57 days |
| 41306 |
vlad902 author:vlad902 |
feat(SimpleGraph): reduce CycleGraph imports |
Reduce the imports for CycleGraph.lean and re-prove and move a few lemmas around as a result.
---
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|
t-combinatorics |
44/23 |
Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/CycleGraph.lean,Mathlib/Combinatorics/SimpleGraph/Hasse.lean |
3 |
13 |
['SnirBroshi', 'github-actions', 'vlad902'] |
nobody |
1 |
4-19263 4 days ago |
9-37608 9 days ago |
9-37300 9 days |
| 40941 |
JX-Mo author:JX-Mo |
feat(RepresentationTheory): add stabilizers of vectors in representations |
Add Representation.stabilizer: the subgroup fixing a vector in a representation.
Provide basic lemmas for zero vectors, scalar multiples, sums, intertwining maps, and conjugations, as a first step toward smooth representations. Make representation-theoretic arguments use this specialized API instead of repeatedly unfolding the fixed-vector condition or routing through the more general MulAction stabilizer API. |
t-algebra
new-contributor
label:t-algebra$ |
68/0 |
Mathlib.lean,Mathlib/RepresentationTheory/Stabilizer.lean |
2 |
66 |
['JX-Mo', 'Whysoserioushah', 'github-actions', 'tb65536'] |
nobody |
1 |
3-50416 3 days ago |
3-50952 3 days ago |
16-22774 16 days |
| 41248 |
tb65536 author:tb65536 |
chore(NumberTheory/RamificationInertia/Basic): deprecate file |
This PR deprecates `NumberTheory/RamificationInertia/Basic.lean` in favor of `RingTheory/RamificationInertia/Basic.lean`.
---
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|
t-ring-theory
t-algebra
t-number-theory
label:t-algebra$ |
40/6 |
Mathlib/NumberTheory/RamificationInertia/Basic.lean |
1 |
6 |
['Multramate', 'github-actions', 'grunweg', 'mathlib-merge-conflicts', 'tb65536'] |
nobody |
1 |
3-36581 3 days ago |
3-37414 3 days ago |
10-20275 10 days |
| 39703 |
YaelDillies author:YaelDillies |
chore: create a `Basic` top folder |
Move a select few folders from `Logic` to a new `Basic` folder.
The goal is to finally move the material misplaced in the `Data` and `Logic` folder and to clarify the various expectations of each folder. Ultimately:
* the `Basic` folder will be about basic predicates on types and basic mathematical types not fitting in any other folder;
* the `Data` folder will be about data structures, instead of the current mix of data structures and basic mathematical types not fitting in any other folder;
* the `Logic` folder will be about advanced logic results not fitting in either `ModelTheory` or `SetTheory`, instead of the current mix of basic predicates on types and advanced logic results.
Many more files (~1000) could be moved, so I will do it in several PRs. Not all files should move to `Basic`. Some files should go to `Algebra.Order` instead (eg `Data.Nat.Lattice`) and some should be straight out deprecated (eg `Data.Analysis`).
[Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/345428-mathlib-reviewers/topic/Basic.20folder/with/597151406)
---
This PR stems from discussions at the MI retreat 2026.
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|
file-removed
t-data
|
164/95 |
Counterexamples/Girard.lean,Mathlib.lean,Mathlib/Algebra/CharZero/Defs.lean,Mathlib/Algebra/Group/Irreducible/Defs.lean,Mathlib/Algebra/Group/Nat/Units.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Group/WithOne/Defs.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/Module/Presentation/Free.lean,Mathlib/Algebra/Module/Projective.lean,Mathlib/Algebra/NeZero.lean,Mathlib/Basic/Denumerable.lean,Mathlib/Basic/ExistsUnique.lean,Mathlib/Basic/IsEmpty.lean,Mathlib/Basic/IsEmpty/Basic.lean,Mathlib/Basic/IsEmpty/Defs.lean,Mathlib/Basic/Logic/Basic.lean,Mathlib/Basic/Logic/Lemmas.lean,Mathlib/Basic/Nonempty.lean,Mathlib/Basic/Nontrivial/Basic.lean,Mathlib/Basic/Nontrivial/Defs.lean,Mathlib/Basic/README.md,Mathlib/Basic/Unique.lean,Mathlib/Basic/UnivLE.lean,Mathlib/CategoryTheory/EssentiallySmall.lean,Mathlib/CategoryTheory/Limits/Types/Colimits.lean,Mathlib/CategoryTheory/Limits/Types/Limits.lean,Mathlib/CategoryTheory/UnivLE.lean,Mathlib/Combinatorics/Quiver/Path.lean,Mathlib/Computability/Primrec/Basic.lean,Mathlib/Data/Bool/Basic.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/GetD.lean,Mathlib/Data/Nat/Basic.lean,Mathlib/Data/Nat/MaxPowDiv.lean,Mathlib/Data/Option/Basic.lean,Mathlib/Data/Quot.lean,Mathlib/Data/README.md,Mathlib/Data/Rat/Denumerable.lean,Mathlib/Data/TwoPointing.lean,Mathlib/Lean/Meta/CongrTheorems.lean,Mathlib/LinearAlgebra/Matrix/Defs.lean,Mathlib/Logic/Equiv/Defs.lean,Mathlib/Logic/Equiv/List.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Logic/README.md,Mathlib/Order/OrderIsoNat.lean,Mathlib/Order/RelClasses.lean,Mathlib/Order/WithBot.lean,Mathlib/RingTheory/Coprime/Basic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/UnivLE.lean,Mathlib/SetTheory/ZFC/Rank.lean,Mathlib/Tactic/CancelDenoms/Core.lean,Mathlib/Tactic/CongrExclamation.lean,Mathlib/Tactic/ITauto.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Tactic/Nontriviality/Core.lean,Mathlib/Tactic/Push.lean,Mathlib/Tactic/Subsingleton.lean,Mathlib/Tactic/Tauto.lean,Mathlib/Testing/Plausible/Testable.lean,Mathlib/Topology/Order/UpperLowerSetTopology.lean,MathlibTest/Linter/PrivateModule/ImportOnly.lean,scripts/autolabel.lean,scripts/noshake.json |
69 |
34 |
['SnirBroshi', 'YaelDillies', 'github-actions', 'grunweg', 'j-loreaux', 'joneugster', 'mathlib-merge-conflicts', 'themathqueen'] |
joneugster assignee:joneugster |
1 |
3-34717 3 days ago |
3-38005 3 days ago |
44-37663 44 days |
| 40405 |
felixpernegger author:felixpernegger |
chore(MeasureTheory/Group): remove an erw |
Extracted from #40348
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|
t-measure-probability |
3/1 |
Mathlib/MeasureTheory/Group/GeometryOfNumbers.lean |
1 |
1 |
['Multramate', 'github-actions'] |
kex-y assignee:kex-y |
1 |
3-33792 3 days ago |
33-27413 33 days ago |
33-27063 33 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
label:t-algebra$ |
0/4 |
Mathlib/Algebra/Group/WithOne/Defs.lean |
1 |
2 |
['Multramate', 'github-actions'] |
nobody |
1 |
3-33714 3 days ago |
20-9882 20 days ago |
20-9532 20 days |
| 40952 |
tb65536 author:tb65536 |
feat(Algebra/Group/Subgroup/Basic): monotonicity of inertia subgroups |
This PR proves that inertia subgroups are monotone.
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|
t-ring-theory
t-algebra
label:t-algebra$ |
5/1 |
Mathlib/Algebra/Group/Subgroup/Basic.lean |
1 |
1 |
['Multramate', 'github-actions'] |
nobody |
1 |
3-33279 3 days ago |
19-13452 19 days ago |
19-13103 19 days |
| 40402 |
felixpernegger author:felixpernegger |
chore(MeasureTheory/Integral): remove an `erw` |
Extracted from #40348. Note we cannot just do `simp_all [...]`
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|
t-measure-probability
tech debt
awaiting-author
|
3/2 |
Mathlib/MeasureTheory/Integral/RieszMarkovKakutani/NNReal.lean |
1 |
5 |
['Multramate', 'felixpernegger', 'github-actions', 'mcdoll'] |
EtienneC30 assignee:EtienneC30 |
1 |
3-17894 3 days ago |
3-21487 3 days ago |
30-7330 30 days |
| 25980 |
Multramate author:Multramate |
refactor(Algebra/Group/Submonoid/Operations): rename restrict to domRestrict and add restrict |
And update the documentation for consistency |
t-group-theory
delegated
|
218/146 |
Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/GroupTheory/FiniteAbelian/Duality.lean,Mathlib/GroupTheory/Focal.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/Maps.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/GroupTheory/PGroup.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/Transfer.lean,Mathlib/LinearAlgebra/RootSystem/WeylGroup.lean,Mathlib/NumberTheory/MulChar/Duality.lean,Mathlib/NumberTheory/MulChar/Lemmas.lean,Mathlib/NumberTheory/NumberField/CMField.lean,Mathlib/NumberTheory/NumberField/Ideal/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean |
17 |
17 |
['Multramate', 'copilot-pull-request-reviewer', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'riccardobrasca', 'tb65536'] |
tb65536 assignee:tb65536 |
1 |
3-10252 3 days ago |
3-31085 3 days ago |
12-85617 12 days |
| 41479 |
YaelDillies author:YaelDillies |
feat(LinearAlgebra): tensor of homs is hom of tensors for finite projective modules |
Generalise this isomorphism and many similar ones from finite free to finite projective. To be able to deduce some isos from some other ones, I had to move them around in a preliminary PR.
Also change the defeq of `homTensorHomEquiv` so that it is *not* defeq to `homTensorHomMap` (but would be if `homTensorHomMap` became heterobasic). This makes `BilinForm.tensorDistribEquiv` defeq to `BilinForm.tensorDistrib`.
Also tag `LinearEquiv.congrRight` with `simps` to generate some required simp lemmas.
Human generated then golfed and edited with Claude Opus, then human-edited some more.
From FLT, PersistentDecomp
Co-authored-by: Edison Xie
Co-authored-by: Andrew Yang <the.erd.one@gmail.com>
Assisted-by: Claude Opus 4.8
---
This is a cleaned up version of #21829 reopened from a fork.
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|
t-algebra label:t-algebra$ |
160/107 |
Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/LinearAlgebra/BilinearForm/TensorProduct.lean,Mathlib/LinearAlgebra/Contraction.lean,Mathlib/LinearAlgebra/TensorProduct/Map.lean,Mathlib/LinearAlgebra/Trace.lean |
5 |
12 |
['Deicyde', 'Whysoserioushah', 'YaelDillies', 'erdOne', 'github-actions', 'kbuzzard'] |
nobody |
1 |
3-6964 3 days ago |
3-5630 3 days ago |
0-38744 10 hours |
| 41537 |
Mathias-Stout author:Mathias-Stout |
feat(RingTheory/TwoSidedIdeal/Lattice): add lemmas on two-sided ideals |
We add three lemmas on two-sided ideals.
These are analogues of existing lemmas of `Submodule` with the same names.
This prepares a follow-up PR proving that quaternions are central simple.
Co-authored-by: Justus Springer [justusspringer@gmx.de](mailto:justusspringer@gmx.de)
---
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|
t-ring-theory
new-contributor
|
13/0 |
Mathlib/RingTheory/TwoSidedIdeal/Lattice.lean |
1 |
5 |
['Whysoserioushah', 'github-actions', 'kbuzzard'] |
nobody |
1 |
3-3846 3 days ago |
3-6289 3 days ago |
3-13716 3 days |
| 39332 |
Michaillus author:Michaillus |
chore(Topology/Spectral): Added two small lemmas |
chore(Topology/Spectral): Added two lemmas
`IsCompact.isClosed_constructibleTopology_of_isOpen`
`IsCompact.isClosed_constructibleTopology_of_isClosed`
---
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|
t-topology
new-contributor
awaiting-author
|
27/0 |
Mathlib/Topology/Defs/Basic.lean,Mathlib/Topology/Spectral/ConstructibleTopology.lean |
2 |
12 |
['Michaillus', 'github-actions', 'j-loreaux', 'plp127', 'qawbecrdtey'] |
j-loreaux assignee:j-loreaux |
1 |
3-3023 3 days ago |
4-82220 4 days ago |
54-79797 54 days |
| 40557 |
xroblot author:xroblot |
feat(RingTheory/Ideal): generalize span_singleton_dvd_span_singleton_iff_dvd and emultiplicity_eq_emultiplicity_span |
Move `Ideal.span_singleton_dvd_span_singleton_iff_dvd` from
`Mathlib.RingTheory.DedekindDomain.Ideal.Lemmas` to
`Mathlib.RingTheory.Ideal.Operations`. The result holds for any `CommSemiring` — the `[IsPrincipalIdealRing R]` hypothesis was not needed.
Generalize `Ideal.emultiplicity_eq_emultiplicity_span` from
`[IsDomain R] [IsPrincipalIdealRing R]` to `[CommRing R]`. The proof simplifies considerably: it follows immediately from `emultiplicity_eq_emultiplicity_iff` and the generalized dvd lemma.
:robot: This PR was extracted from the [SKW project](https://github.com/xroblot/SKW) by Claude. |
t-ring-theory |
29/26 |
Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/Ideal/Operations.lean |
2 |
3 |
['Multramate', 'github-actions', 'xroblot'] |
nobody |
1 |
2-76106 2 days ago |
30-2841 30 days ago |
30-2491 30 days |
| 41260 |
SnirBroshi author:SnirBroshi |
feat(GroupTheory/Exponent): the order of a group divides a power of its exponent |
For finite groups:
- `(Monoid.exponent G).primeFactors = (Nat.card G).primeFactors`
- `Nat.card G ∣ Monoid.exponent G ^ Nat.card G`
---
This requires importing Cauchy's theorem (`GroupTheory.Perm.Cycle.Type`) in `Exponent.lean` which I'm not sure about, but the alternatives are either moving the theorems to `PGroup.lean`, or creating a new file with a strange name like `ExponentLemmas.lean`.
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|
t-group-theory
large-import
|
27/5 |
Mathlib/GroupTheory/Exponent.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean |
2 |
10 |
['SnirBroshi', 'github-actions', 'ocfnash', 'tb65536'] |
tb65536 assignee:tb65536 |
1 |
2-63986 2 days ago |
9-85629 9 days ago |
10-32526 10 days |
| 36202 |
vihdzp author:vihdzp |
feat: more theorems on the Cantor normal form |
We also remove some redundant assumptions.
Used in the CGT repo.
---
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|
t-set-theory |
68/17 |
Mathlib/SetTheory/Ordinal/CantorNormalForm.lean |
1 |
21 |
['SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] |
nobody |
1 |
2-63090 2 days ago |
109-32862 109 days ago |
128-24473 128 days |
| 41319 |
lakesare author:lakesare |
feat(Order/Interval/Set/Disjoint): add iUnion_Icc_eq_Ici_self_iff (and dual), iUnion_Ioi_eq_Ioi_iInf, iUnion_Iio_eq_Iio_iSup |
From the Carleson project.
___
**Upstreaming from Carleson: [Carleson/ToMathlib/Order/Interval/Set/Disjoint.lean](https://github.com/fpvandoorn/carleson/blob/master/Carleson/ToMathlib/Order/Interval/Set/Disjoint.lean)**
Changes from the Carleson version:
1. `IsGLB.biUnion_Ioi_eq_Ioi` theorem is deleted, because Mathlib has `IsGLB.biUnion_Ioi_eq`.
`IsGLB.biUnion_Ioi_eq_Ioi` was not referenced anywhere in Carleson (apart from this very file we're porting), so nothing else to clean up.
Carleson:
```
#check IsGLB.biUnion_Ioi_eq_Ioi
IsGLB.biUnion_Ioi_eq_Ioi.{u_1} {α : Type u_1} [LinearOrder α] {s : Set α} {a : α} (a_glb : IsGLB s a) : ⋃ x ∈ s, Ioi x = Ioi a
```
Mathlib:
```
#check IsGLB.biUnion_Ioi_eq
IsGLB.biUnion_Ioi_eq.{v} {α : Type v} [LinearOrder α] {s : Set α} {a : α} (h : IsGLB s a) : ⋃ x ∈ s, Ioi x = Ioi a
```
2. `Set.iUnion_Icc_eq_Ici_self_iff` upstreamed (verbatim)
3. `Set.iUnion_Icc_eq_Iic_self_iff` newly added theorem, dual of the above
4. `iUnion_Ioi_eq_Ioi_iInf`, `iUnion_Iio_eq_Iio_iSup` - upstreamed (refactored)
[](https://gitpod.io/from-referrer/)
|
carleson
t-order
new-contributor
easy
|
13/0 |
Mathlib/Order/Interval/Set/Disjoint.lean |
1 |
4 |
['github-actions', 'lakesare', 'wwylele'] |
nobody |
1 |
2-61611 2 days ago |
9-29713 9 days ago |
9-29363 9 days |
| 39755 |
wwylele author:wwylele |
chore(GroupTheory): remove a defeq abuse |
---
I am not sure if this is the right change to make, so I'd like to start a discussion from this. The issue here seems to be that the simp lemma [MulAction.orbitRel.Quotient.orbit_mk](https://leanprover-community.github.io/mathlib4_docs/Mathlib/GroupTheory/GroupAction/Defs.html#MulAction.orbitRel.Quotient.orbit_mk) fired and changed the underlying type of variables in the expression, which is not defeq at instance transparency, and fails defeq check for `MulAction` ([MulAction.instElemOrbit](https://leanprover-community.github.io/mathlib4_docs/Mathlib/GroupTheory/GroupAction/Defs.html#MulAction.instElemOrbit) vs [MulAction.instElemOrbit_1](https://leanprover-community.github.io/mathlib4_docs/Mathlib/GroupTheory/GroupAction/Defs.html#MulAction.instElemOrbit_1)). The easy change here is to disable the offending simp, but it feels like a common language pitfall. Should we do either of the following instead?
- remove `MulAction.orbitRel.Quotient.orbit_mk` from default simp set
- Make the the orbit definition more transparent
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|
tech debt
t-group-theory
|
1/2 |
Mathlib/GroupTheory/GroupAction/Basic.lean |
1 |
1 |
['Multramate', 'github-actions', 'joneugster'] |
nobody |
1 |
2-32210 2 days ago |
49-85196 49 days ago |
49-84846 49 days |
| 40593 |
grunweg author:grunweg |
chore(MathlibTest): fix defLemma warnings |
In all these cases, a dummy definition was declared of type True: the `defProp` linter complains that a declaration of type `True` should be a `lemma`. Instead, change to a definition with value (the natural 0).
---
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tech debt
maintainer-merge
|
5/7 |
MathlibTest/Linter/DocPrime.lean,MathlibTest/Tactic/Says/Basic.lean |
2 |
6 |
['adomani', 'github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts'] |
nobody |
1 |
2-28233 2 days ago |
9-23351 9 days ago |
20-84174 20 days |
| 41395 |
felixpernegger author:felixpernegger |
chore: remove redundant backward.privateInPublic exceptions |
Remove all `set_option backward.privateInPublic false` which are not needed, excluding MathlibTest
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tech debt
maintainer-merge
|
0/63 |
Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/BoolRing.lean,Mathlib/Algebra/Category/CommAlgCat/Basic.lean,Mathlib/Algebra/Category/CommBialgCat.lean,Mathlib/Algebra/Category/Grp/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Basic.lean,Mathlib/Algebra/Category/MonCat/Basic.lean,Mathlib/Algebra/Category/Ring/Basic.lean,Mathlib/Algebra/Category/Semigrp/Basic.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Subscheme.lean,Mathlib/CategoryTheory/Bicategory/InducedBicategory.lean,Mathlib/CategoryTheory/Galois/Decomposition.lean,Mathlib/CategoryTheory/Galois/EssSurj.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Internal/FunctorCategory.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/FieldTheory/CardinalEmb.lean,Mathlib/LinearAlgebra/PerfectPairing/Restrict.lean,Mathlib/Logic/Godel/GodelBetaFunction.lean,Mathlib/NumberTheory/ArithmeticFunction/Misc.lean,Mathlib/NumberTheory/LegendreSymbol/JacobiSymbol.lean,Mathlib/NumberTheory/NumberField/House.lean,Mathlib/Order/Category/BddDistLat.lean,Mathlib/Order/Category/BddLat.lean,Mathlib/Order/Category/BddOrd.lean,Mathlib/Order/Category/BoolAlg.lean,Mathlib/Order/Category/DistLat.lean,Mathlib/Order/Category/FinBddDistLat.lean,Mathlib/Order/Category/Frm.lean,Mathlib/Order/Category/HeytAlg.lean,Mathlib/Order/Category/Lat.lean,Mathlib/Order/Category/LinOrd.lean,Mathlib/Order/Category/PartOrd.lean,Mathlib/Order/Category/PartOrdEmb.lean,Mathlib/Order/Category/Preord.lean,Mathlib/Order/DirectedInverseSystem.lean,Mathlib/Order/Nucleus.lean,Mathlib/RepresentationTheory/Continuous/TopRep.lean,Mathlib/RepresentationTheory/Rep/Basic.lean,Mathlib/RingTheory/MvPowerSeries/Evaluation.lean |
42 |
14 |
['felixpernegger', 'github-actions', 'grunweg', 'joneugster', 'leanprover-radar', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-splicebot'] |
nobody |
1 |
2-28089 2 days ago |
6-16943 6 days ago |
6-16602 6 days |
| 41332 |
JovanGerb author:JovanGerb |
chore: fix many `nsmul`/`zsmul` diamonds |
This PR fixes many diamonds around `nsmul`/`zsmul` fields. The common problematic pattern is that we first define the `AddCommMonoid`/`AddCommGroup` instance, and later define the `SMul` or `Algebra` instance. But we need to define the `smul` operation first, so that it can be used to define the `nsmul` and `zsmul` operations such that there is no diamond.
These fixes are all ported from #38781 (the instance diamonds linter), and they were found after we got the `NSMul` and `ZSMul` type classes (#38036).
---
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|
tech debt
maintainer-merge
|
160/131 |
Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplex.lean,Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/Normed/Ring/WithAbs.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Basic.lean,Mathlib/LinearAlgebra/Quotient/Defs.lean,Mathlib/LinearAlgebra/TensorAlgebra/Basic.lean,Mathlib/NumberTheory/Cyclotomic/Basic.lean,Mathlib/RingTheory/Extension/Cotangent/Basic.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Kaehler/Basic.lean,Mathlib/Topology/Algebra/Module/Spaces/UniformConvergenceCLM.lean,Mathlib/Topology/Algebra/Module/Spaces/WeakBilin.lean,Mathlib/Topology/Algebra/Module/Spaces/WeakDual.lean,Mathlib/Topology/Algebra/UniformConvergence.lean,Mathlib/Topology/VectorBundle/Constructions.lean |
17 |
8 |
['JovanGerb', 'eric-wieser', 'github-actions', 'joneugster', 'mathlib-merge-conflicts'] |
eric-wieser and joneugster assignee:eric-wieser assignee:joneugster |
1 |
2-27329 2 days ago |
5-8995 5 days ago |
5-34303 5 days |
| 40981 |
LLaurance author:LLaurance |
chore(Algebra/Ring/BooleanRing): resolve TODO on non-terminal simp |
---
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t-algebra
tech debt
label:t-algebra$ |
1/3 |
Mathlib/Algebra/Ring/BooleanRing.lean |
1 |
2 |
['Multramate', 'github-actions'] |
nobody |
1 |
2-24128 2 days ago |
2-24676 2 days ago |
18-16062 18 days |
| 39161 |
alreadydone author:alreadydone |
feat(LinearAlgebra): commutative semirings satisfy strong rank condition |
Co-authored-by: Aristotle (Harmonic) <aristotle-harmonic@harmonic.fun>
Co-authored-by: Monica Omar @themathqueen
Thanks to ChatGPT and Gemini for converting part of Yi-Jia Tan's paper into LaTeX, which served as solutions provided to Aristotle.
- [x] depends on: #40875
---
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|
t-algebra
LLM-generated
label:t-algebra$ |
265/3 |
Mathlib.lean,Mathlib/LinearAlgebra/Matrix/Nonsingular.lean,Mathlib/LinearAlgebra/Matrix/SemiringInverse.lean,docs/references.bib |
4 |
33 |
['SnirBroshi', 'alreadydone', 'github-actions', 'mathlib-dependent-issues', 'tb65536', 'themathqueen', 'wwylele'] |
themathqueen assignee:themathqueen |
1 |
2-11474 2 days ago |
2-17376 2 days ago |
19-79550 19 days |
| 39736 |
NoahW314 author:NoahW314 |
feat(RingTheory/MvPolynomial/MonomialOrder): add `leadingTerm` lemmas |
Add lemmas for `leadingTerm` to match those for `leadingCoeff`.
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|
t-ring-theory |
87/0 |
Mathlib/RingTheory/MvPolynomial/MonomialOrder.lean |
1 |
5 |
['Hagb', 'NoahW314', 'github-actions'] |
alreadydone and joneugster assignee:alreadydone assignee:joneugster |
1 |
1-63092 1 day ago |
50-55808 50 days ago |
50-55458 50 days |
| 40326 |
eric-wieser author:eric-wieser |
feat(Data/Multiset): add the Multiset version of `List.find?` |
This is often more convenient (and computationally more efficient) than using `Multiset.choose`, since it avoids us having to do a preliminary pass over the set to determine if any elements satisfy the predicate.
While it doesn't make any difference since `Finsupp` is (currently) noncomputable, we use this to implement `Finsupp.embDomain` more simply.
The motivation for this def is to efficiently define `DFinsupp.embDomain`.
---
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|
t-data |
164/23 |
Mathlib.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/List/Find.lean,Mathlib/Data/Multiset/Find.lean,Mathlib/Data/Set/Subsingleton.lean |
6 |
22 |
['NoahW314', 'Vierkantor', 'YaelDillies', 'eric-wieser', 'github-actions', 'mathlib-dependent-issues'] |
nobody |
1 |
1-60635 1 day ago |
1-60689 1 day ago |
28-18477 28 days |
| 39341 |
drocta author:drocta |
feat(Algebra/Colimit/DirectLimit): add DirectLimit.(NonUnital)StarAlgebra.(lift/of) maps and associated lemmas |
add the `of` and `lift` maps for `DirectLimit.StarAlgebra` and `DirectLimit.NonUnitalStarAlgebra`, as well as the associated lemmas, `of_f`, `lift_comp_of`, `lift_of`, and `hom_ext` for each. Also make `DirectLimit.NonUnitalAlgebra` only require `[Monoid R]` rather than `[CommSemiring R]`.
---
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Use of AI: I again asked ChatGPT for some advice about some things about this code. I can personally vouch for all of the code I'm submitting, and that I understand all of it.
This is the third part of my project towards supporting direct limits of $C^∗$ -algebras (as I described [on Zulip](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Early.20feedback.20on.20approach.20towards.20formalizing.20UHF.20algebras.3F) ).
This PR adds an import of `Mathlib.Algebra.Star.StarAlgHom` (because it needs `StarAlgHom` and `NonUnitalStarAlgHom`) replacing/encompassing the previously added imports of `Mathlib.Algebra.Star.StarRingHom` and `Mathlib.Algebra.Algebra.NonUnitalHom` (added in PR #38308 and #38672 respectively). |
t-algebra
new-contributor
label:t-algebra$ |
100/3 |
Mathlib/Algebra/Colimit/DirectLimit.lean |
1 |
18 |
['dagurtomas', 'drocta', 'github-actions', 'themathqueen'] |
themathqueen assignee:themathqueen |
1 |
1-54589 1 day ago |
1-55441 1 day ago |
51-32321 51 days |
| 41178 |
Parcly-Taxel author:Parcly-Taxel |
chore: delete deprecated declarations to the end of 2025 |
The automated commits were made by running
```
#clear_deprecations "2025-11-01" "2025-12-31" really
```
(I had to do this in multiple sessions because VS Code kept running out of memory.) |
tech debt
maintainer-merge
|
0/2780 |
Mathlib.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/Category/FGModuleCat/Basic.lean,Mathlib/Algebra/Category/Ring/FinitePresentation.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Algebra/Group/Action/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Indicator.lean,Mathlib/Algebra/Group/Irreducible/Indecomposable.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/Submodule/Ker.lean,Mathlib/Algebra/Module/Submodule/LinearMap.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/IsBotOne.lean,Mathlib/Algebra/Order/Module/Archimedean.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/TypeTags.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Expand.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Algebra/Polynomial/Splits.lean,Mathlib/Algebra/QuadraticAlgebra/Basic.lean,Mathlib/Algebra/QuadraticAlgebra/Defs.lean,Mathlib/Algebra/Quotient.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/Star/LinearMap.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms.lean,Mathlib/Analysis/Analytic/Binomial.lean,Mathlib/Analysis/Analytic/OfScalars.lean,Mathlib/Analysis/CStarAlgebra/Unitary/Connected.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Complex/ValueDistribution/CharacteristicFunction.lean,Mathlib/Analysis/Complex/ValueDistribution/LogCounting/Basic.lean,Mathlib/Analysis/Complex/ValueDistribution/Proximity/Basic.lean,Mathlib/Analysis/Distribution/AEEqOfIntegralContDiff.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Deriv.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Fourier.lean,Mathlib/Analysis/Distribution/TemperedDistribution.lean,Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Analysis/Fourier/FourierTransform.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/Fourier/Inversion.lean,Mathlib/Analysis/Fourier/LpSpace.lean,Mathlib/Analysis/Fourier/PoissonSummation.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/Laplacian.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/Projection/Submodule.lean,Mathlib/Analysis/InnerProductSpace/Symmetric.lean,Mathlib/Analysis/Matrix/Order.lean,Mathlib/Analysis/MellinInversion.lean,Mathlib/Analysis/Meromorphic/Basic.lean,Mathlib/Analysis/Normed/Field/Lemmas.lean,Mathlib/Analysis/Normed/Field/WithAbs.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/Normed/Operator/LinearIsometry.lean,Mathlib/Analysis/Polynomial/MahlerMeasure.lean,Mathlib/Analysis/SpecialFunctions/Gaussian/FourierTransform.lean,Mathlib/CategoryTheory/Abelian/Basic.lean,Mathlib/CategoryTheory/Abelian/SerreClass/Bousfield.lean,Mathlib/CategoryTheory/EffectiveEpi/Basic.lean,Mathlib/CategoryTheory/Functor/KanExtension/DenseAt.lean,Mathlib/CategoryTheory/Groupoid.lean,Mathlib/CategoryTheory/Limits/ExactFunctor.lean,Mathlib/CategoryTheory/Limits/Shapes/Multiequalizer.lean,Mathlib/CategoryTheory/Limits/Shapes/RegularMono.lean,Mathlib/CategoryTheory/Localization/Bousfield.lean,Mathlib/CategoryTheory/Localization/DerivabilityStructure/PointwiseRightDerived.lean,Mathlib/CategoryTheory/Localization/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Grp.lean,Mathlib/CategoryTheory/Monoidal/Closed/Cartesian.lean,Mathlib/CategoryTheory/Monoidal/CommGrp_.lean,Mathlib/CategoryTheory/Monoidal/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/Grp.lean,Mathlib/CategoryTheory/Monoidal/OfHasFiniteProducts.lean,Mathlib/CategoryTheory/Monoidal/Subcategory.lean,Mathlib/CategoryTheory/ObjectProperty/FullSubcategory.lean,Mathlib/CategoryTheory/Preadditive/AdditiveFunctor.lean,Mathlib/CategoryTheory/Presentable/OrthogonalReflection.lean,Mathlib/CategoryTheory/Quotient.lean |
257 |
15 |
['Parcly-Taxel', 'felixpernegger', 'github-actions', 'joneugster', 'mathlib-merge-conflicts'] |
joneugster assignee:joneugster |
2 |
1-26386 1 day ago |
2-28264 2 days ago |
11-67745 11 days |
| 40813 |
Thmoas-Guan author:Thmoas-Guan |
feat(Algebra/Module): lemma for `spanFinrank` eq one |
In this PR we added equivalent characterization of `spanFinrank` equal to one.
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|
t-algebra label:t-algebra$ |
7/0 |
Mathlib/Algebra/Module/SpanRank.lean |
1 |
3 |
['Thmoas-Guan', 'Whysoserioushah', 'github-actions'] |
nobody |
1 |
1-23301 1 day ago |
23-15059 23 days ago |
23-14709 23 days |
| 40252 |
EtienneC30 author:EtienneC30 |
feat: set-integral when a random variable is independent from a set |
If a random variable `X` is independent from a sigma-algebra `m` and `A` is a set in `m`, then
`∫ ω in A, f (X ω) ∂P = P.real A * ∫ ω, f (X ω) ∂P` for any `AEStronglyMeasurable` function `f`.
---
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|
brownian
t-measure-probability
delegated
|
29/0 |
Mathlib/Probability/Independence/Integration.lean |
1 |
3 |
['RemyDegenne', 'github-actions', 'mathlib-bors'] |
kex-y assignee:kex-y |
1 |
1-4332 1 day ago |
8-4683 8 days ago |
29-24737 29 days |
| 40841 |
TJHeeringa author:TJHeeringa |
chore(Topology/Algebra): rename .equivOfInverse to .ofContinuousLinearMap |
Renames `ContinuousLinearEquiv.equivOfInverse` and `ContinuousLinearEquiv.equivOfInverse'` to `ContinuousLinearEquiv.ofContinuousLinearMap` and `ContinuousLinearEquiv.ofContinuousLinearMap'`. It reorders the order of arguments to match that of `ofLinearMap`.
---
Prerequisite for the `TensorProduct.congrL` requested in https://github.com/leanprover-community/mathlib4/pull/40074#issuecomment-4650716234.
Addresses the ToDO `*ToDo*: Improve the naiming to make it match `LinearMap.ofLinear`.` for `ContinuousLinearEquiv.equivOfInverse`.
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|
t-topology
blocked-by-other-PR
|
78/21 |
Mathlib/Topology/Algebra/Module/Equiv.lean |
1 |
73 |
['TJHeeringa', 'Whysoserioushah', 'b-mehta', 'github-actions', 'j-loreaux', 'mathlib-dependent-issues', 'themathqueen'] |
PatrickMassot assignee:PatrickMassot |
1 |
0-81020 22 hours ago |
4-76343 4 days ago |
16-1782 16 days |
| 40865 |
TJHeeringa author:TJHeeringa |
refactor(Algebra/Module/Equiv): update name and refactor API ofLinearEquiv |
Change the name of `LinearEquiv.ofLinear` to `LinearEquiv.ofLinearMap` and change the API. This replaces `_apply` by `coe_`, introduces `_symm`, which makes `_symm_apply` and `_symm_toLinearMap` redundant, and changes `_toLinearMap` to `toLinearMap_`.
---
This PR is as discussed in https://github.com/leanprover-community/mathlib4/pull/40841#discussion_r3448504317 and https://github.com/leanprover-community/mathlib4/pull/40841#issuecomment-4762175719.
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|
t-algebra label:t-algebra$ |
114/97 |
Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/Algebra/Module/Presentation/Basic.lean,Mathlib/Algebra/Star/Module.lean,Mathlib/Analysis/Normed/Operator/LinearIsometry.lean,Mathlib/LinearAlgebra/Contraction.lean,Mathlib/LinearAlgebra/DirectSum/TensorProduct.lean,Mathlib/LinearAlgebra/Dual/Lemmas.lean,Mathlib/LinearAlgebra/ExteriorPower/Basic.lean,Mathlib/LinearAlgebra/Finsupp/LinearCombination.lean,Mathlib/LinearAlgebra/Matrix/SpecialLinearGroup.lean,Mathlib/LinearAlgebra/Multilinear/DFinsupp.lean,Mathlib/LinearAlgebra/Pi.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/DFinsupp.lean,Mathlib/LinearAlgebra/PiTensorProduct/Dual.lean,Mathlib/LinearAlgebra/Projection.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Associator.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/DirectLimit.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/External.lean,Mathlib/LinearAlgebra/TensorProduct/Map.lean,Mathlib/LinearAlgebra/TensorProduct/Pi.lean,Mathlib/LinearAlgebra/TensorProduct/Prod.lean,Mathlib/LinearAlgebra/TensorProduct/Quotient.lean,Mathlib/LinearAlgebra/TensorProduct/Subalgebra.lean,Mathlib/LinearAlgebra/TensorProduct/Submodule.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean,Mathlib/LinearAlgebra/Trace.lean,Mathlib/RepresentationTheory/Coinvariants.lean,Mathlib/RepresentationTheory/FiniteIndex.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/LowDegree.lean,Mathlib/RingTheory/AdicCompletion/AsTensorProduct.lean,Mathlib/RingTheory/AdicCompletion/Functoriality.lean,Mathlib/RingTheory/Extension/Cotangent/Basis.lean,Mathlib/RingTheory/Flat/Equalizer.lean,Mathlib/RingTheory/IsTensorProduct.lean,Mathlib/RingTheory/Localization/Module.lean,Mathlib/RingTheory/MatrixAlgebra.lean,Mathlib/RingTheory/PicardGroup.lean |
44 |
24 |
['TJHeeringa', 'github-actions', 'j-loreaux', 'mathlib-bors', 'mathlib-merge-conflicts', 'themathqueen'] |
nobody |
1 |
0-79749 22 hours ago |
1-20212 1 day ago |
15-63519 15 days |
| 40551 |
emlis42 author:emlis42 |
feat(SetTheory/Ordinal): prove that `ε₀` and `Γ₀` are countable |
This PR proves that `ε₀` and `Γ₀` are countable, i.e. `Countable (ToType ε₀)` and `Countable (ToType Γ₀)`.
This completes a TODO in `SetTheory/Ordinal/Veblen.lean`. |
t-set-theory
large-import
|
144/2 |
Mathlib/SetTheory/Cardinal/Aleph.lean,Mathlib/SetTheory/Cardinal/Ordinal.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/Univ.lean,Mathlib/SetTheory/Ordinal/Veblen.lean |
5 |
53 |
['emlis42', 'felixpernegger', 'github-actions', 'plp127', 'vihdzp'] |
nobody |
1 |
0-63095 17 hours ago |
22-54296 22 days ago |
30-9542 30 days |
| 39307 |
FordUniver author:FordUniver |
feat(Combinatorics/SimpleGraph/Copy): introduce `UnlabeledCopy` carrier subtype |
Adds `abbrev UnlabeledCopy A B := {B' : B.Subgraph // Nonempty (A ≃g B'.coe)}` and uses it to replace the previous inline filter-set body of `copyCount G H`. Drops the now unused legacy Finset-image bridge `copyCount_eq_card_image_copyToSubgraph`. Adds `uniqueUnlabeledCopyBot` instance so `copyCount_bot` is a one-liner via `Fintype.card_unique`.
Co-authored-by: Malte Jackisch <45597826+MaltyBlanket@users.noreply.github.com>
---
**Step 1/5 of the `Copy` / `InducedCopy` refactor-feat stack.**
This PR isolates the `UnlabeledCopy` type introduction and the count's type-form redefinition from the larger rename/convention work in the rest of the stack. Note that resolving the current clash in naming (`Copy` and `UnlabeledCopy` vs `labelledCopyCount` and `copyCount`) is part of #38745.
|
t-combinatorics
maintainer-merge
|
40/26 |
Mathlib/Combinatorics/SimpleGraph/Copy.lean |
1 |
14 |
['FordUniver', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'mitchell-horner'] |
nobody |
2 |
0-60245 16 hours ago |
3-61069 3 days ago |
50-33756 50 days |
| 41081 |
JX-Mo author:JX-Mo |
feat(RepresentationTheory): add Subrepresentation.toRepresentation_apply and Subrepresentation.quotient |
Add a lemma for Subrepresentation recording the inherited group action. Help avoid unfold Subrepresentation.toRepresentation.
Add the quotient representation associated to a subrepresentaiton. It wraps up Representation.quotient and Representation.Subrepresentation. Help avoid writing down explicitly the stability condition required in Representation.quotient.
|
t-algebra
new-contributor
label:t-algebra$ |
26/0 |
Mathlib/RepresentationTheory/Subrepresentation.lean |
1 |
17 |
['JX-Mo', 'Whysoserioushah', 'github-actions'] |
nobody |
1 |
0-42214 11 hours ago |
0-42821 11 hours ago |
16-12040 16 days |
| 39607 |
TentativeConvert author:TentativeConvert |
feat(Algebra/DirectSum): equivalence between direct sum indexed by ι₁ and double sum indexed by ι₂ and fibres of f : ι₁ → ι₂ |
1. Add variant `equivCongrLeft'` of `equivCongrLeft`, and corresponding `…_apply` lemma.
2. Add `…_of lemmas` for both `equivCongrLeft` and `equivCongrLeft'`.
3. Add `…of lemma` for `sigmaCurry`, i.e. `sigmaCurry_of`.
4. Add `sigmaFiberAddEquiv`: the equivalence between a direct sum indexed by a type `ι₁` and the double sum indexed by a type `ι₂` and the fibres of a map `f : ι₁ → ι₂`. Add two `…_apply` lemmas and an `…_of` lemma.
---
This is supposed to be a first step towards merging the draft PR #39356.
re 1: Mathematically, I don't see why one version should be preferred over the other, but I found the existing `equivCongrLeft` more difficult to work with when the equivalence `h : ι ≃ κ` is naturally given in the opposite direction. (I could not avoid explicit type casts through the equality `h.symm.symm = h` when defining `sigmaFiberAddEquiv` in terms of `equivCongrLeft`.)
Very unsure about the name of `equivCongrLeft'`. (I see that the name `equivCongrLeft` was chosen in analogy with `Equiv.piCongrLeft`. `Equiv.piCongrRight` looks very different, so presumably `equivCongrLeft'` should *not* be called `equivCongrRight`.)
re 4: Very unsure about the naming of the two different `…_apply` lemmas; called them `…_apply` and `…_apply'` for now. The second (`…_apply'`) cannot be a `simp` lemma as it would prevent the first (`…_apply`) from firing.
I've used Claude Opus for understanding error messages and git interaction, but everything is hand coded.
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t-algebra
new-contributor
maintainer-merge
label:t-algebra$ |
46/3 |
Mathlib/Algebra/DirectSum/Basic.lean |
1 |
48 |
['TentativeConvert', 'eric-wieser', 'github-actions', 'joneugster', 'themathqueen'] |
joneugster assignee:joneugster |
2 |
0-30839 8 hours ago |
13-17712 13 days ago |
52-25282 52 days |
| 41620 |
JovanGerb author:JovanGerb |
fix(GRewrite): preserve binder names in a forall |
This PR is a follow-up to #40323, and ensures that `grw` preserves binder names and binder info in universal quantifiers.
This special-case support is needed because foralls are not represented with a lambda, like all other binders.
---
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|
t-meta
maintainer-merge
|
15/1 |
Mathlib/Tactic/GRewrite/Core.lean,MathlibTest/Tactic/GRewrite.lean |
2 |
2 |
['github-actions', 'joneugster'] |
joneugster assignee:joneugster |
1 |
0-29074 8 hours ago |
1-13692 1 day ago |
1-13342 1 day |
| 40033 |
JJYYY-JJY author:JJYYY-JJY |
chore: remove flexible linter suppressions |
Replace `simp; infer_instance` with explicit proofs.
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|
new-contributor
tech debt
awaiting-author
awaiting-zulip
|
6/6 |
Mathlib/Dynamics/TopologicalEntropy/DynamicalEntourage.lean,Mathlib/Topology/UniformSpace/Ultra/Constructions.lean |
2 |
14 |
['JJYYY-JJY', 'chenson2018', 'github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts', 'vihdzp'] |
nobody |
2 |
0-28717 7 hours ago |
2-31665 2 days ago |
41-33564 41 days |
| 40249 |
vasnesterov author:vasnesterov |
feat(Tactic/ComputeAsymptotics/Multiseries): corecursion for multiseries |
Translate API for general corecursion for `Seq` to `Multiseries`.
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This is a part of the `compute_asymptotics` tactic (#28291).
- [x] depends on: #40255
[](https://gitpod.io/from-referrer/) |
t-meta
large-import
maintainer-merge
|
185/0 |
Mathlib/Tactic/ComputeAsymptotics/Multiseries/Defs.lean |
1 |
3 |
['github-actions', 'joneugster', 'mathlib-dependent-issues'] |
joneugster assignee:joneugster |
1 |
0-25937 7 hours ago |
32-62443 32 days ago |
32-79378 32 days |
| 29145 |
JovanGerb author:JovanGerb |
chore: use `to_additive` in more places |
This PR addresses some comments about `to_additive` not working, by making it work more.
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[](https://gitpod.io/from-referrer/)
|
t-meta
maintainer-merge
|
9/43 |
Mathlib/Combinatorics/Additive/DoublingConst.lean,Mathlib/Topology/Algebra/InfiniteSum/Module.lean |
2 |
8 |
['JovanGerb', 'github-actions', 'joneugster', 'mathlib-merge-conflicts'] |
joneugster assignee:joneugster |
1 |
0-25040 6 hours ago |
2-85983 2 days ago |
3-1808 3 days |
| 41594 |
plp127 author:plp127 |
fix(Tactic/DepRewrite): `rw!` produces type incorrect terms |
Fix bug where `rw!` can produce type-incorrect terms when the motive is dependent but the rewritten term is definitionally equal to the original term. See [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/conv-mode.20rw.21.20can.20produce.20type-incorrect.20term/near/609501125).
---
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|
t-meta
maintainer-merge
|
71/13 |
Mathlib/Tactic/DepRewrite.lean,MathlibTest/depRewrite.lean |
2 |
2 |
['github-actions', 'joneugster'] |
joneugster assignee:joneugster |
1 |
0-24896 6 hours ago |
2-3615 2 days ago |
2-3775 2 days |
| 40338 |
JovanGerb author:JovanGerb |
feat(GRewrite): support universe changing rewrites |
This PR allows `grw` to deal with relations that are heterogenous (the two sides don't have the same type).
I'm slightly surprised that this works :). I added a basic test showing that the polymorphic relations on cardinals can be used in `grw`, as proposed in https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Universe-heterogeneous.20ordinal.20and.20cardinal.20relations/with/495593531
---
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|
t-meta
maintainer-merge
|
56/5 |
Mathlib/Tactic/GRewrite/Core.lean,MathlibTest/Tactic/GRewrite.lean |
2 |
19 |
['JovanGerb', 'eric-wieser', 'github-actions', 'joneugster', 'mathlib-merge-conflicts'] |
eric-wieser and joneugster assignee:eric-wieser assignee:joneugster |
1 |
0-24421 6 hours ago |
9-59780 9 days ago |
34-85069 34 days |
| 39027 |
fpvandoorn author:fpvandoorn |
feat: delaborators for inequalities in big operators |
`∏ i < n, f i` was already accepted as valid syntax, but this PR now also prints appropriate sums/products using this notation.
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[Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/missing.20delaborator.20for.20finsum)
[](https://gitpod.io/from-referrer/)
|
t-algebra
t-meta
delegated
label:t-algebra$ |
132/49 |
Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,MathlibTest/BigOps.lean |
2 |
8 |
['b-mehta', 'fpvandoorn', 'github-actions', 'joneugster', 'mathlib-bors'] |
joneugster assignee:joneugster |
1 |
0-12408 3 hours ago |
0-12433 3 hours ago |
55-10189 55 days |
| 39436 |
dtumad author:dtumad |
chore: Add `seqLeft` and `seqRight` unfolding to monad_norm simp set |
This PR adds `seqLeft_eq_bind` and `seqRight_eq_bind` to `monad_norm`, so that `<*` and `*>` get unfolded in the same way as `<*>` already does when using the `simp` set.
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|
t-meta
new-contributor
easy
maintainer-merge
|
1/1 |
Mathlib/Tactic/Attr/Core.lean |
1 |
3 |
['github-actions', 'joneugster'] |
kim-em assignee:kim-em |
1 |
0-11518 3 hours ago |
57-75838 57 days ago |
57-75488 57 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
awaiting-author
|
150/8 |
Mathlib/Tactic/CrossRefAttribute.lean,MathlibTest/CrossRefAttribute.lean |
2 |
4 |
['Deicyde', 'github-actions', 'joneugster', 'mathlib-merge-conflicts'] |
nobody |
1 |
0-10296 2 hours ago |
0-10296 2 hours ago |
3-72689 3 days |
| 37067 |
kbuzzard author:kbuzzard |
feat: add_group tactic |
Written by Claude Code, additivising the `group` tactic, although there were some problems which needed human input.
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[](https://gitpod.io/from-referrer/)
This is me burning Claude credits as a result of this comment [#mathlib4 > MulAut and to_additive @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/MulAut.20and.20to_additive/near/581059625) . Just to be clear, all comments below are human-written by me with 0 AI assistance.
To my amusement, naively additivising the `group` tactic to make an `add_group` tactic does not work. The problem is that the algorithm run by `group` involves adding `← zpow_neg_one` to the simp set, which rewrites `x⁻¹` to `x ^ (-1)` for `x` in any group: the idea is that `x ^ (z : Int)` is preferred in the algorithm and `x⁻¹` is eliminated. Amusingly, when additivised, this becomes `-x -> -1 • x` which then immediately becomes `(-1 • 1) • x` which then becomes `((-1 • 1) • 1) • x` etc etc, as the integers are themselves an additive group. So we need to find another way of normalising terms of the form `-x`. The idea is to simply prove a bunch more simp lemmas which will deal with things like `-x + x` etc.
|
t-meta
LLM-generated
|
207/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/AddGroup.lean,MathlibTest/Tactic/AddGroup.lean |
4 |
28 |
['JovanGerb', 'SnirBroshi', 'github-actions', 'joneugster', 'kbuzzard', 'mathlib-merge-conflicts', 'thorimur'] |
thorimur assignee:thorimur |
1 |
0-6330 1 hour ago |
0-12488 3 hours ago |
28-44018 28 days |
| 41214 |
artie2000 author:artie2000 |
chore(Algebra/Polynomial/Degree): rename lemma |
* Rename `degree_sub_lt` to `degree_sub_lt_left` due to proposed `_right` variation PRed at #37956. Rename suggested at https://github.com/leanprover-community/mathlib4/pull/37956#discussion_r3070265942
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[](https://gitpod.io/from-referrer/)
|
t-ring-theory |
12/9 |
Mathlib/Algebra/Polynomial/Degree/Defs.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/Sequence.lean,Mathlib/FieldTheory/Minpoly/Field.lean,Mathlib/FieldTheory/Minpoly/IsIntegrallyClosed.lean,Mathlib/LinearAlgebra/Lagrange.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/PowerSeries/WeierstrassPreparation.lean |
8 |
1 |
['github-actions', 'themathqueen'] |
nobody |
1 |
0-4300 1 hour ago |
10-70821 10 days ago |
10-72708 10 days |
| 35812 |
khwilson author:khwilson |
feat(MeasureTheory/Group/GeometryOfNumbers): successive minima and existence of a directional basis |
Define the successive minima of a discrete subgroup of a real vector space with respect to a convex set. These invariants show up throughout the geometry of numbers and are the focus of Minkowski's Second Theorem (whose statement is left here with a `proof_wanted`).
Note: The key lemma is that the "gauge set" of the convex set is closed. I took the approach of showing that it is sequentially closed. There's an alternative approach via showing it's the union of a finite number of closed sets. I personally thought this approach was more intuitive, but the union approach may result in a slightly shorter proof.
Co-authored-by: Yaël Dillies <yael.dillies@gmail.com>
---
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[](https://gitpod.io/from-referrer/)
|
new-contributor
t-measure-probability
|
350/36 |
Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/Convex/Body.lean,Mathlib/Analysis/Convex/Gauge.lean,Mathlib/LinearAlgebra/FiniteDimensional/Basic.lean,Mathlib/MeasureTheory/Group/GeometryOfNumbers.lean,Mathlib/NumberTheory/NumberField/Units/Regulator.lean |
7 |
96 |
['Vierkantor', 'YaelDillies', 'github-actions', 'joneugster', 'khwilson', 'mathlib-merge-conflicts', 'ocfnash', 'sgouezel'] |
nobody |
1 |
0-4184 1 hour ago |
2-85148 2 days ago |
65-73850 65 days |
| Number |
Author |
Title |
Description |
Labels |
+/- |
Modified files (first 100) |
📝 |
💬 |
All users who commented or reviewed |
Assignee(s) |
Updated |
Last status change |
total time in review |
| 14720 |
eric-wieser author:eric-wieser |
refactor: change `CliffordAlgebra.lift` to use quadratic maps |
This works towards addressing a footnote on [page 152](https://eric-wieser.github.io/thesis/eric-wieser-thesis.pdf#page=164) of my thesis.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-algebra
label:t-algebra$ |
200/167 |
Mathlib/LinearAlgebra/CliffordAlgebra/Basic.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Equivs.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Prod.lean,Mathlib/LinearAlgebra/QuadraticForm/Complex.lean,Mathlib/LinearAlgebra/QuadraticForm/Dual.lean,Mathlib/LinearAlgebra/QuadraticForm/Isometry.lean,Mathlib/LinearAlgebra/QuadraticForm/IsometryEquiv.lean,Mathlib/LinearAlgebra/QuadraticForm/Prod.lean,Mathlib/LinearAlgebra/QuadraticForm/QuadraticModuleCat.lean,Mathlib/LinearAlgebra/QuadraticForm/Real.lean,Mathlib/LinearAlgebra/QuadraticForm/TensorProduct/Isometries.lean |
11 |
1 |
['github-actions'] |
nobody |
711-37062 1 year ago |
unknown |
0-0 0 seconds |
| 14889 |
yuma-mizuno author:yuma-mizuno |
feat(CategoryTheory/Bicategory/Monad): define monad in bicategory |
---
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- [ ] depends on: #12107
[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
blocked-by-other-PR
t-category-theory
|
1566/12 |
Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Functor/Oplax.lean,Mathlib/CategoryTheory/Bicategory/LocallyDiscrete.lean,Mathlib/CategoryTheory/Bicategory/Monad/Adjunction.lean,Mathlib/CategoryTheory/Bicategory/Monad/Basic.lean,Mathlib/CategoryTheory/Bicategory/Monad/Cat.lean,Mathlib/CategoryTheory/Monad/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Coherence.lean,Mathlib/Tactic/Widget/StringDiagram.lean,scripts/noshake.json,test/StringDiagram.lean,widget/src/penrose/monoidal.dsl,widget/src/penrose/monoidal.sty |
14 |
2 |
['github-actions'] |
nobody |
711-37062 1 year ago |
unknown |
0-0 0 seconds |
| 14036 |
adomani author:adomani |
Test/decl diff in lean |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict |
465/1040 |
.github/workflows/Lean_decl_diff.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,.github/workflows/mk_build_yml.sh,scripts/decls_diff_hybrid.sh,scripts/list_decls.lean |
8 |
1 |
['github-actions'] |
nobody |
711-37061 1 year ago |
unknown |
0-0 0 seconds |
| 12952 |
adomani author:adomani |
test: length statistics |
---
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[](https://gitpod.io/from-referrer/)
|
WIP
test-ci
|
124/0 |
.github/workflows/mathlib_stats.yml,.github/workflows/ml_stats_label.yaml,scripts/mathlib_stats.sh |
3 |
9 |
['github-actions'] |
nobody |
711-37060 1 year ago |
unknown |
0-0 0 seconds |
| 13297 |
urkud author:urkud |
feat(Semicontinuous): add `comp` lemma |
---
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[](https://gitpod.io/from-referrer/) |
merge-conflict
awaiting-author
t-topology
t-order
|
31/13 |
Mathlib/Topology/Semicontinuous.lean |
1 |
3 |
['sgouezel', 'urkud'] |
nobody |
711-37060 1 year ago |
775-37758 775 days ago |
0-18201 5 hours |
| 13372 |
adomani author:adomani |
dev: generic replacement |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict |
446/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/ReplaceRefine.lean,Mathlib/Tactic/Replacements.lean |
4 |
4 |
['adomani', 'github-actions'] |
nobody |
711-37060 1 year ago |
unknown |
0-0 0 seconds |
| 13512 |
adomani author:adomani |
test: count all |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict |
85/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/Tally.lean |
4 |
0 |
[] |
nobody |
711-37060 1 year ago |
unknown |
0-0 0 seconds |
| 12416 |
adomani author:adomani |
chore: remove some cdots |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict |
3830/3239 |
Archive/Imo/Imo1972Q5.lean,Archive/Imo/Imo2006Q5.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2021Q1.lean,Archive/Wiedijk100Theorems/AbelRuffini.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/BirthdayProblem.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Archive/Wiedijk100Theorems/Partition.lean,Counterexamples/Cyclotomic105.lean,Counterexamples/DirectSumIsInternal.lean,Mathlib.lean,Mathlib/Algebra/Algebra/Spectrum.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/List/Basic.lean,Mathlib/Algebra/Category/GroupCat/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Images.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/CharP/Quotient.lean,Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/DirectLimit.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/GCDMonoid/Finset.lean,Mathlib/Algebra/GeomSum.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/GroupPower/Order.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/Algebra/Homology/Exact.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplex.lean,Mathlib/Algebra/Homology/HomotopyCategory/Triangulated.lean,Mathlib/Algebra/Homology/LocalCohomology.lean,Mathlib/Algebra/Homology/TotalComplex.lean,Mathlib/Algebra/Lie/DirectSum.lean,Mathlib/Algebra/Lie/IdealOperations.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Lie/Weights/Basic.lean,Mathlib/Algebra/Module/DedekindDomain.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/Module/LocalizedModule.lean,Mathlib/Algebra/Module/PID.lean,Mathlib/Algebra/Module/Submodule/Bilinear.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/Module/Zlattice/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/MonoidAlgebra/Ideal.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Order/Archimedean.lean,Mathlib/Algebra/Order/BigOperators/Group/List.lean,Mathlib/Algebra/Order/CauSeq/BigOperators.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Int.lean,Mathlib/Algebra/Order/Group/MinMax.lean,Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Algebra/Order/Pointwise.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Polynomial/PartialFractions.lean,Mathlib/Algebra/Polynomial/Reverse.lean,Mathlib/Algebra/Polynomial/RingDivision.lean,Mathlib/Algebra/Polynomial/UnitTrinomial.lean,Mathlib/Algebra/Quandle.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/AlgebraicGeometry/FunctionField.lean,Mathlib/AlgebraicGeometry/Gluing.lean,Mathlib/AlgebraicGeometry/Morphisms/Basic.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiCompact.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiSeparated.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/AlgebraicGeometry/Pullbacks.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/SimplexCategory.lean,Mathlib/AlgebraicTopology/SplitSimplicialObject.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/BoundedVariation.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Extend.lean,Mathlib/Analysis/Calculus/InverseFunctionTheorem/ApproximatesLinearOn.lean,Mathlib/Analysis/Calculus/LocalExtr/Basic.lean,Mathlib/Analysis/Calculus/ParametricIntegral.lean,Mathlib/Analysis/Calculus/TangentCone.lean |
608 |
0 |
[] |
nobody |
711-37059 1 year ago |
unknown |
0-0 0 seconds |
| 12465 |
rosborn author:rosborn |
style: Change Subtype.val to (↑) |
---
This is a test to see replacing `Subtype.val` with `(↑)` where appropriate.
After performing the rewrite, some of the types subtly changed in a difficult to detect manner.
Before the change, `openEmbedding' _` had type `OpenEmbedding Subtype.val` where `Subtype.val` expanded as `@Subtype.val α fun x ↦ x ∈ U : ↥U → α`. After the change, `Subtype.val` expands to `@Subtype.val α fun x ↦ x ∈ ↑U : { x // x ∈ ↑U } → α`. This caused some later proofs to fail due to the different definition.
In a similar case, within the proof of `mfderiv_coe_sphere_injective` on line 553 `Subtype.val` expanded as `@Subtype.val E fun x ↦ x ∈ (Submodule.span ℝ {↑(-v)})ᗮ : ↥(Submodule.span ℝ {↑(-v)})ᗮ → E`.
After changing to `(↑)`, it expanded to `@Subtype.val E fun x ↦ x ∈ ↑(Submodule.span ℝ {↑(-v)})ᗮ : { x // x ∈ ↑(Submodule.span ℝ {↑(-v)})ᗮ } → E`. One benefit to using `(↑)` was that it lead to a shorter proof as `ContinuousLinearEquiv.coe_coe` could be removed on line 559.
In general, this subtle change in types is basically impossible to detect without a tool like leaff.
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|
merge-conflict |
50/50 |
Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/Normed/Group/Hom.lean,Mathlib/CategoryTheory/Generator.lean,Mathlib/CategoryTheory/Limits/Shapes/Types.lean,Mathlib/CategoryTheory/Subobject/Types.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Set/Function.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/Geometry/Manifold/ContMDiff/Basic.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/Geometry/Manifold/LocalInvariantProperties.lean,Mathlib/GroupTheory/Subsemigroup/Operations.lean,Mathlib/LinearAlgebra/LinearIndependent.lean,Mathlib/Order/Directed.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/Order/RelIso/Set.lean,Mathlib/RingTheory/Artinian.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/PGame.lean,Mathlib/SetTheory/Surreal/Basic.lean,Mathlib/Topology/Bornology/Constructions.lean,Mathlib/Topology/EMetricSpace/Lipschitz.lean,Mathlib/Topology/Germ.lean,Mathlib/Topology/UniformSpace/Basic.lean,Mathlib/Topology/UniformSpace/UniformConvergenceTopology.lean,Mathlib/Topology/UniformSpace/UniformEmbedding.lean |
28 |
1 |
['eric-wieser', 'rosborn'] |
nobody |
711-37059 1 year ago |
unknown |
0-0 0 seconds |
| 12473 |
adomani author:adomani |
first translations |
---
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|
merge-conflict |
424/265 |
Mathlib.lean,Mathlib/Order/Lattice.lean,Mathlib/Order/WithBot.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MinMax.lean |
5 |
0 |
[] |
nobody |
711-37059 1 year ago |
unknown |
0-0 0 seconds |
| 12528 |
adomani author:adomani |
test: autotranslations Bot --> Top |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict |
350/294 |
Mathlib.lean,Mathlib/Order/WithBot.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MinMax.lean,test/MinMax.lean |
5 |
0 |
[] |
nobody |
711-37059 1 year ago |
803-72497 803 days ago |
0-4 4 seconds |
| 12588 |
adomani author:adomani |
remove trailingDegree |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict |
1280/979 |
Mathlib.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Degree/TrailingDegree.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/Mirror.lean,Mathlib/Order/WithBot.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MinMax.lean,Mathlib/Tactic/MinMaxTwo.lean,test/MinMax.lean |
11 |
0 |
[] |
nobody |
711-37059 1 year ago |
unknown |
0-0 0 seconds |
| 12608 |
eric-wieser author:eric-wieser |
feat: allow `nsmul` / `zsmul` to be omitted again, with a warning |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-algebra
t-meta
label:t-algebra$ |
118/2 |
Mathlib.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Tactic.lean,Mathlib/Tactic/DefaultFieldLinter.lean,scripts/noshake.json,test/default_field_linter.lean |
6 |
12 |
['YaelDillies', 'eric-wieser', 'fpvandoorn', 'github-actions'] |
nobody |
711-37059 1 year ago |
784-83446 784 days ago |
5-72493 5 days |
| 12637 |
adomani author:adomani |
translation: MonoidAlgebra to AddMonoidAlgebra |
[Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/merge.20Add-MonoidAlgebra)
* #12646 was found as a consequence of unification.
* #12659 the typo `single 1 1` for `single 0 1`.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
t-meta
label:t-algebra$ |
615/986 |
Mathlib.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Division.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MinMaxTwo.lean,scripts/noshake.json |
7 |
0 |
[] |
nobody |
711-37059 1 year ago |
unknown |
0-0 0 seconds |
| 12984 |
adomani author:adomani |
Adomani/periodic reports dev custom action |
---
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[](https://gitpod.io/from-referrer/)
|
WIP
test-ci
|
366/0 |
.github/workflows/mathlib_stats.yml,.github/workflows/ml_stats_label.yaml,scripts/count_decls.lean,scripts/mathlib_stats.sh |
4 |
69 |
['github-actions'] |
nobody |
711-37059 1 year ago |
unknown |
0-0 0 seconds |
| 13057 |
alreadydone author:alreadydone |
feat(NumberTheory): characterize elliptic divisibility sequences |
Main results:
+ Every `normEDS` is an elliptic divisibility sequence (EDS). The key proof is `rel₄_of_anti_oddRec_evenRec`, based on my original argument first published on [MathSE](https://math.stackexchange.com/a/4903422/12932)
+ Conversely, every EDS is equal to some `normEDS` (assuming that the first two terms are not zero divisors)
---
- [ ] depends on: #13155
- [x] depends on: #13153
- [x] depends on: #10843
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
t-number-theory
blocked-by-other-PR
label:t-algebra$ |
1032/55 |
Mathlib/Algebra/Ring/NegOnePow.lean,Mathlib/Data/Int/Defs.lean,Mathlib/Data/Int/Parity.lean,Mathlib/GroupTheory/Perm/Sign.lean,Mathlib/NumberTheory/EllipticDivisibilitySequence.lean |
5 |
6 |
['Multramate', 'alreadydone', 'kbuzzard'] |
nobody |
711-37059 1 year ago |
779-61487 779 days ago |
0-34672 9 hours |
| 12192 |
Ruben-VandeVelde author:Ruben-VandeVelde |
feat: generalize isLittleO_const_id_atTop/atBot |
From PNT+.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-analysis
|
10/4 |
Mathlib/Analysis/Asymptotics/Asymptotics.lean |
1 |
6 |
['Ruben-VandeVelde', 'llllvvuu', 'urkud'] |
nobody |
711-37058 1 year ago |
815-59154 815 days ago |
1-21749 1 day |
| 10024 |
ADedecker author:ADedecker |
feat: rename `connectedComponentOfOne` to `identityComponent`, prove that it is normal and open |
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-topology
awaiting-CI
|
58/24 |
Mathlib/FieldTheory/AbsoluteGaloisGroup.lean,Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Algebra/Group/TopologicalAbelianization.lean,Mathlib/Topology/Algebra/OpenSubgroup.lean,Mathlib/Topology/Connected/Basic.lean |
5 |
0 |
[] |
nobody |
711-37057 1 year ago |
898-29181 898 days ago |
0-832 13 minutes |
| 10521 |
eric-wieser author:eric-wieser |
chore: generalize `IsBoundedLinearMap` to modules |
Most of the lemmas don't actually need the normed on the scalars at all.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-analysis
|
58/42 |
Mathlib/Analysis/NormedSpace/BoundedLinearMaps.lean |
1 |
3 |
['github-actions', 'j-loreaux', 'urkud'] |
nobody |
711-37057 1 year ago |
878-5107 878 days ago |
1-29105 1 day |
| 10721 |
urkud author:urkud |
feat(Order/FunLike): define `PointwiseLE` |
- introduce a mixin class `DFunLike.PointwiseLE`, use it to define `DFunLike.instPartialOrder`;
- add a generic `DFunLike.orderEmbeddingCoe`
- add `DFunLike.PointwiseLE` instances here and there.
With this refactor and #13022, I'm going to generalize lemmas like `MeasureTheory.ae_mono` to `OuterMeasureClass`.
---
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- [x] depends on: #12983
[](https://gitpod.io/from-referrer/) |
merge-conflict
t-order
t-logic
|
123/50 |
Mathlib.lean,Mathlib/Algebra/Order/Hom/Ring.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Dynamics/Circle/RotationNumber/TranslationNumber.lean,Mathlib/GroupTheory/Congruence.lean,Mathlib/Order/FunLike.lean,Mathlib/Order/Heyting/Hom.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Hom/Bounded.lean,Mathlib/Order/Hom/CompleteLattice.lean,Mathlib/Topology/Order/Hom/Basic.lean |
13 |
48 |
['YaelDillies', 'dupuisf', 'urkud'] |
nobody |
711-37057 1 year ago |
761-15459 761 days ago |
64-12984 64 days |
| 10845 |
Shamrock-Frost author:Shamrock-Frost |
Refactor: Make MonoidalFunctor carry the data of an inverse |
We change the definition of a strong monoidal functor from a lax monoidal functor for which the unitor and tensorator are `IsIso` to a lax monoidal functor with the data of inverses for the unitor and tensorator. This requires fixing a lot of knock on effects.
---
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This is a **draft PR**. I would like to talk with people on zulip before merging it, and plan ahead to when we have oplax/colax monoidal functors as well. I'm not sure the approach I took here where `MonoidalFunctor` inherits from `LaxMonoidalFunctor` is a good choice if we want to be lax/oplax symmetric.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
RFC
t-category-theory
|
3799/1589 |
Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Homology/HomotopyCategory/DegreewiseSplit.lean,Mathlib/CategoryTheory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Adjunction/Mates.lean,Mathlib/CategoryTheory/Adjunction/Opposites.lean,Mathlib/CategoryTheory/Adjunction/Prod.lean,Mathlib/CategoryTheory/Adjunction/Whiskering.lean,Mathlib/CategoryTheory/Bicategory/End.lean,Mathlib/CategoryTheory/Bicategory/SingleObj.lean,Mathlib/CategoryTheory/CatCommSq.lean,Mathlib/CategoryTheory/CatSquares.lean,Mathlib/CategoryTheory/Enriched/Basic.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/Iso.lean,Mathlib/CategoryTheory/Monoidal/Adjunction.lean,Mathlib/CategoryTheory/Monoidal/Braided.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Monoidal/CommMon_.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/CategoryTheory/Monoidal/End.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/Limits.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/NaturalTransformation.lean,Mathlib/CategoryTheory/Monoidal/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Rigid/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/Rigid/OfEquivalence.lean,Mathlib/CategoryTheory/Monoidal/Subcategory.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,Mathlib/CategoryTheory/Monoidal/Types/Basic.lean,Mathlib/CategoryTheory/Opposites.lean,Mathlib/CategoryTheory/Products/Associator.lean,Mathlib/CategoryTheory/Products/Basic.lean,Mathlib/CategoryTheory/Shift/Basic.lean,Mathlib/CategoryTheory/Shift/Pullback.lean,Mathlib/CategoryTheory/Whiskering.lean,Mathlib/RepresentationTheory/Action/Monoidal.lean,Mathlib/RepresentationTheory/GroupCohomology/Resolution.lean,Mathlib/RepresentationTheory/Rep.lean |
41 |
7 |
['Shamrock-Frost', 'joelriou'] |
nobody |
711-37057 1 year ago |
unknown |
0-0 0 seconds |
| 11100 |
eric-wieser author:eric-wieser |
feat(CategoryTheory/Limits): add `Functor.mapBinaryBiconeInv` |
---
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- [ ] depends on: #11130
[](https://gitpod.io/from-referrer/)
It's tempting to try to prove something like
```lean
theorem Functor.mapBinaryBiconeInv_toCone [Limits.HasZeroMorphisms C]
[Limits.HasZeroMorphisms D]
(e : D ⥤ C) [IsEquivalence e] {X Y : D} (b : BinaryBicone (e.obj X) (e.obj Y)) :
(e.mapBinaryBiconeInv b).toCone =
(e.mapConeInv <| (Cones.postcompose (pairComp X Y e).symm.hom).obj b.toCone) := by
simp
sorry
theorem Functor.mapBinaryBiconeInv_toCocone [Limits.HasZeroMorphisms C]
[Limits.HasZeroMorphisms D]
(e : D ⥤ C) [IsEquivalence e] {X Y : D} (b : BinaryBicone (e.obj X) (e.obj Y)) :
(e.mapBinaryBiconeInv b).toCocone =
(e.mapCoconeInv <| (Cocones.precompose (pairComp X Y e).hom).obj b.toCocone) := by
sorry
```
but maybe equality is evil here |
merge-conflict
t-category-theory
awaiting-CI
|
52/0 |
Mathlib/CategoryTheory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Biproducts.lean |
3 |
6 |
['TwoFX', 'eric-wieser'] |
nobody |
711-37057 1 year ago |
unknown |
0-0 0 seconds |
| 8503 |
thorimur author:thorimur |
feat: meta utils for `refine?` |
This PR introduces some metaprogramming infrastructure and utilities that are necessary for `refine?` (#8364).
* `elabTermWithHoles'` (and `withCollectingNewGoalsFrom'`): a more configurable version of `elabTermWithHoles`, which allows: preserving the initial mvar type; *not* tagging untagged goals; and postponing mvars.
* Some `Syntax` and `TSyntax` functionality, including:
* `TSyntax.map`(`M`), for acting on `TSyntax` with functions `f : Syntax -> (m) Syntax`
* Range operations: `includes` and `isEqByRange`
* `setTrailingInfoBy?` and `unsetOriginalTrailing`, which is like `unsetTrailing`, but behaves as expected.
* `Term.withoutModifyingState`, which does not allow unknown mvarIds to escape via the infotree
* `hasNewErrors`, which runs a monad computation and returns the value along with `true` or `false` depending on whether new error messages have been logged
* the option `pp.anonymousMVarSuffixes`, which can be set to `false` to replace all numeric suffixes of anonymous mvars with `✝`, which is useful in tandem with `#guard_msgs` for tests (but is essentially a workaround—although it can make some tactic states more legible).
---
I'm open to suggestions on the location and name of the option/delaborator used for trimming the numeric suffixes of anonymous mvar names (which is used in the tests)—including whether or not it should exist in the first place, as it's essentially just a workaround.
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-meta
|
312/5 |
Mathlib.lean,Mathlib/Lean/CoreM.lean,Mathlib/Lean/Elab/Tactic/ElabTerm.lean,Mathlib/Lean/Elab/Term.lean,Mathlib/Util/Delaborators.lean,Mathlib/Util/Syntax.lean |
6 |
2 |
['kmill', 'thorimur'] |
kmill assignee:kmill |
711-37056 1 year ago |
928-9380 928 days ago |
38-46649 38 days |
| 8519 |
eric-wieser author:eric-wieser |
refactor(LinearAlgebra/TensorProduct): golf using `liftAddHom` |
This new `TensorProduct.liftAddHom` doesn't require bilinearity, only that scalar multiplication can be moved between the arguments.
While in theory we only need the `AddMonoidHom` version as it offers exactly the same generality, we first provide an unbundled `liftFun` as this seems to give a sizeable performance boost if used in downstream `lift` variants.
---
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- [x] depends on: #8571
- [x] depends on: #8584
[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-algebra
label:t-algebra$ |
53/50 |
Mathlib/Algebra/Category/AlgebraCat/Monoidal.lean,Mathlib/LinearAlgebra/TensorProduct.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean |
3 |
28 |
['bustercopley', 'eric-wieser', 'jcommelin', 'jjaassoonn', 'leanprover-bot', 'mathlib-bors'] |
nobody |
711-37056 1 year ago |
951-2419 951 days ago |
5-6524 5 days |
| 8582 |
eric-wieser author:eric-wieser |
wip |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict |
3/7 |
Mathlib/Algebra/Category/AlgebraCat/Monoidal.lean,Mathlib/LinearAlgebra/TensorProduct.lean |
2 |
4 |
['eric-wieser', 'leanprover-bot'] |
nobody |
711-37056 1 year ago |
unknown |
0-0 0 seconds |
| 8616 |
eric-wieser author:eric-wieser |
feat(Algebra/FreeAlgebra): add right action and `IsCentralScalar` |
---
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- [ ] depends on: #abc [optional extra text]
-->
- [ ] depends on: #8652
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
awaiting-CI
label:t-algebra$ |
30/8 |
Mathlib/Algebra/FreeAlgebra.lean |
1 |
1 |
[] |
nobody |
711-37056 1 year ago |
958-70998 958 days ago |
2-25170 2 days |
| 8658 |
eric-wieser author:eric-wieser |
feat: support right actions for `Con` |
This adds a new `Con.CompatibleSMul` typeclass that captures exactly the condition when `smul` descends to the quotient.
I was not quite able to merge this with `MulAction.QuotientAction`:
* The imports are such that the congruence relation `QuotientGroup.con` is not yet available in that file
* `QuotientGroup.con` requires the subgroup to be normal, while `MulAction.QuotientAction` does not
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-algebra
label:t-algebra$ |
80/18 |
Mathlib/GroupTheory/Congruence.lean,Mathlib/RingTheory/Congruence.lean |
2 |
6 |
['YaelDillies', 'eric-wieser'] |
nobody |
711-37056 1 year ago |
928-2703 928 days ago |
29-65537 29 days |
| 8788 |
FMLJohn author:FMLJohn |
feat(Algebra/Module/GradeZeroModule): if `A` is a graded semiring and `M` is a graded `A`-module, then each grade of `M` is a module over the 0-th grade of `A`. |
---
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- [ ] depends on: #8187
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
label:t-algebra$ |
237/4 |
Mathlib.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Module/GradeZeroModule.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/Noetherian.lean |
6 |
4 |
['FMLJohn', 'github-actions'] |
nobody |
711-37056 1 year ago |
951-26952 951 days ago |
1-57831 1 day |
| 8906 |
jjaassoonn author:jjaassoonn |
feat: add some missing lemmas about linear algebra |
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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- [ ] depends on: #xyz [optional extra text]
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- [ ] depends on: #8905 [lifting injective modules to higher universe]
[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-algebra
label:t-algebra$ |
45/1 |
Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Module/Injective.lean,Mathlib/LinearAlgebra/Basic.lean,Mathlib/LinearAlgebra/BilinearMap.lean |
4 |
21 |
['AntoineChambert-Loir', 'alreadydone', 'jjaassoonn'] |
nobody |
711-37056 1 year ago |
947-10150 947 days ago |
0-343 5 minutes |
| 8961 |
eric-wieser author:eric-wieser |
refactor: use the coinduced topology on ULift |
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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- [x] depends on: #8958
[](https://gitpod.io/from-referrer/)
|
please-adopt
merge-conflict
awaiting-author
awaiting-CI
|
46/14 |
Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Topology/Bornology/Constructions.lean,Mathlib/Topology/Constructions.lean |
3 |
6 |
['eric-wieser', 'github-actions', 'urkud'] |
nobody |
711-37056 1 year ago |
944-68886 944 days ago |
0-1 1 second |
| 9146 |
laughinggas author:laughinggas |
feat(Data/ZMod/Defs): Topological structure on `ZMod` |
Added a discrete topology structure to `ZMod n` for all `n`
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
awaiting-author
t-topology
label:t-algebra$ |
55/3 |
Mathlib.lean,Mathlib/Topology/Algebra/Constructions.lean,Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Instances/ZMod.lean,Mathlib/Topology/Maps.lean |
5 |
61 |
['YaelDillies', 'eric-wieser', 'github-actions', 'jcommelin', 'laughinggas', 'mo271', 'urkud'] |
nobody |
711-37056 1 year ago |
917-81547 917 days ago |
7-11053 7 days |
| 9229 |
eric-wieser author:eric-wieser |
refactor(Algebra/GradedMonoid): Use `HMul` to define `GMul` |
This make the notation much nicer, but I'm pretty sure this is a bad idea for performance / ambiguity reasons.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-algebra
label:t-algebra$ |
114/125 |
Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/DirectSum/Ring.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/GradedMulAction.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/Algebra/MonoidAlgebra/ToDirectSum.lean,Mathlib/LinearAlgebra/TensorAlgebra/ToTensorPower.lean,Mathlib/LinearAlgebra/TensorPower.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/Internal.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean |
11 |
6 |
['eric-wieser', 'leanprover-bot'] |
nobody |
711-37056 1 year ago |
unknown |
0-0 0 seconds |
| 9252 |
astrainfinita author:astrainfinita |
chore: remove redundant covariance instances, add priority |
I noticed that the following code is surprisingly slow.
``` lean
import Mathlib
count_heartbeats in
example {n : ℕ} : CovariantClass (Fin (n + 1)) (Fin (n + 1)) (· + ·) (· < ·) := by
try infer_instance
sorry
```
This PR removed some redundant instances. The heartbeats have dropped from 19118 to 11450 (still too slow).
Lean4 still seems to make some redundant attempts. See also https://github.com/leanprover-community/mathlib4/issues/6646#issuecomment-1691792488.
---
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[](https://gitpod.io/from-referrer/)
|
WIP
t-algebra
t-order
merge-conflict
slow-typeclass-synthesis
awaiting-author
label:t-algebra$ |
40/32 |
Mathlib/Algebra/CovariantAndContravariant.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/CategoryTheory/Abelian/DiagramLemmas/Four.lean |
4 |
8 |
['astrainfinita', 'leanprover-bot', 'urkud'] |
nobody |
711-37056 1 year ago |
unknown |
0-0 0 seconds |
| 9354 |
chenyili0818 author:chenyili0818 |
feat: monotonicity of gradient on convex real-valued functions |
This file is based on Mathlib.Analysis.Calculus.Gradient.Basic, and describes the calculation properties
co-authored-by: Ziyu Wang [tropicalfish910@gmail.com](mailto:tropicalfish910@gmail.com)
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-analysis
|
540/0 |
Mathlib.lean,Mathlib/Analysis/Convex/ConvexFunction.lean |
2 |
15 |
['github-actions', 'winstonyin'] |
nobody |
711-37056 1 year ago |
901-67682 901 days ago |
23-36394 23 days |
| 9356 |
alexjbest author:alexjbest |
feat: assumption? |
A little helper for replacing `assumption`s with `exact` statements quickly
---
If this is approved I will add tests
This begs the question of whether it might simply be better to add some sort of code action for "replace with trythis output"
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-meta
|
24/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/TryAssumption.lean |
4 |
5 |
['alexjbest', 'j-loreaux', 'jcommelin'] |
nobody |
711-37056 1 year ago |
905-73054 905 days ago |
19-26336 19 days |
| 9469 |
dupuisf author:dupuisf |
feat: maximum modulus principle for functions vanishing at infinity |
This PR adds versions of the maximum modulus principle for functions vanishing at infinity that parallel those we already had for functions over a bounded set. These will have applications in e.g. norm interpolation.
---
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[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-analysis
|
71/0 |
Mathlib/Analysis/Complex/AbsMax.lean |
1 |
8 |
['dupuisf', 'j-loreaux'] |
nobody |
711-37056 1 year ago |
905-78302 905 days ago |
12-86009 12 days |
| 9482 |
yuma-mizuno author:yuma-mizuno |
refactor(CategoryTheory/Monoidal): add `LaxMonoidalStruct` |
Add a `LaxMonoidalStruct` with only the unit morphism `ε` and the tensorator `μ`. This is used in #6307 to provide two different constructors for `LaxMonoidal` that have common `ε` and `μ` but use the tensor of morphisms or the whiskerings.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-category-theory
|
21/8 |
Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/CategoryTheory/Monoidal/Functorial.lean,Mathlib/CategoryTheory/Monoidal/Limits.lean |
3 |
0 |
[] |
nobody |
711-37056 1 year ago |
unknown |
0-0 0 seconds |
| 9487 |
eric-wieser author:eric-wieser |
feat: the exponential of dual numbers over non-commutative rings |
This is a work in progress, as I don't know my way around the measure theory library.
---
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- [x] depends on: #9489
- [x] depends on: #9486
- [x] depends on: #10427
- [ ] depends on: #10452
[](https://gitpod.io/from-referrer/)
|
WIP
t-algebra
t-measure-probability
merge-conflict
t-analysis
label:t-algebra$ |
97/0 |
Mathlib/Analysis/NormedSpace/TrivSqZeroExt.lean |
1 |
7 |
['github-actions'] |
nobody |
711-37056 1 year ago |
unknown |
0-0 0 seconds |
| 9504 |
alreadydone author:alreadydone |
chore: remove some IsSeparable assumptions |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-algebra
label:t-algebra$ |
41/14 |
Mathlib/NumberTheory/NumberField/Norm.lean,Mathlib/RingTheory/Norm.lean |
2 |
0 |
[] |
nobody |
711-37056 1 year ago |
unknown |
0-0 0 seconds |
| 9510 |
eric-wieser author:eric-wieser |
feat(Analysis/Calculus/DualNumber): Extending differentiable functions to dual numbers |
This shows that this operation preserves multiplication and composition
---
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[](https://gitpod.io/from-referrer/)
|
WIP
t-algebra
t-analysis
awaiting-CI
label:t-algebra$ |
119/0 |
Mathlib/Analysis/Calculus/DualNumber.lean |
1 |
4 |
['github-actions'] |
nobody |
711-37056 1 year ago |
unknown |
0-0 0 seconds |
| 9570 |
eric-wieser author:eric-wieser |
feat(Algebra/Star): Non-commutative generalization of `StarModule` |
[Zulip thread](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Star.20modules.20over.20non-commutative.20scalars/near/383664005).
Until we address #7152, we have to have both `StarModule` and `StarModule'`.
To prove this generalization is useful, this shows that with it as an assumption, `TrivSqZeroExt` is a `StarRing`.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-algebra
awaiting-CI
label:t-algebra$ |
66/6 |
Mathlib/Algebra/Star/Basic.lean,Mathlib/Algebra/Star/Pi.lean,Mathlib/Algebra/Star/Prod.lean,Mathlib/Algebra/TrivSqZeroExt.lean |
4 |
0 |
[] |
nobody |
711-37056 1 year ago |
unknown |
0-0 0 seconds |
| 9642 |
eric-wieser author:eric-wieser |
refactor(Analysis/Normed/{Group/Field}/Basic): Let `extends` generate the repeated fields |
New-style structure shenanigans mean that instance constructors randomly complain about a missing field that can be found with `__ : MetricSpace _ := infer_instance`.
---
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[](https://gitpod.io/from-referrer/)
I will write a longer PR description for this once CI is happy
|
WIP
merge-conflict
awaiting-author
help-wanted
t-analysis
|
122/202 |
Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Matrix.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Completion.lean,Mathlib/Analysis/Normed/Order/Basic.lean,Mathlib/Analysis/NormedSpace/ProdLp.lean,Mathlib/Analysis/NormedSpace/Star/Matrix.lean,Mathlib/Analysis/NormedSpace/Unitization.lean,Mathlib/Analysis/Quaternion.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/InformationTheory/Hamming.lean,Mathlib/MeasureTheory/Measure/Lebesgue/VolumeOfBalls.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding.lean,Mathlib/NumberTheory/Padics/PadicIntegers.lean,Mathlib/Topology/ContinuousFunction/Bounded.lean |
17 |
11 |
['eric-wieser', 'leanprover-bot', 'urkud'] |
nobody |
711-37056 1 year ago |
unknown |
0-0 0 seconds |
| 6580 |
adomani author:adomani |
chore: `move_add`-driven replacements |
This PR accompanies #6576 and uses `move_add/mul` to simplify/streamline a selection of proofs.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
|
12/13 |
Counterexamples/Monic_nonRegular.lean,Mathlib/Algebra/Associated.lean,Mathlib/Data/Polynomial/RingDivision.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean |
4 |
0 |
[] |
nobody |
711-37055 1 year ago |
996-86219 996 days ago |
62-34247 62 days |
| 6630 |
MohanadAhmed author:MohanadAhmed |
feat: Reduced Spectral Theorem |
For A hermitian matrix $A : n \times n$ with rank $A.rank \leq n$, we can eliminate the zero eigenvalues and their corresponding eigenvectors from the (alternate) spectral theorem. As such the matrix $A$ can be written as: $$A = V₁ D V₁ᴴ$$ where
- $V₁$ : $n \times r$ is the matrix of eigenvector with non-zero associated eigenvalues.
- $D$ is $r \times r$ is the diagonal matrix containing only non-zero eigenvalues on its main diagonal.
with $r = A.rank$ being the rank of the matrix
Towards that goal we make several equivalence definitions:
- `{i // hA.eigenvalues i ≠ 0} ≃ Fin (A.rank)` the set of non-zero eigenvalues can be indexed by the numbers from 0 to (r - 1).
- `{i // ¬ hA.eigenvalues i ≠ 0} ≃ Fin (n - A.rank)` the set of non-zero eigenvalues can be indexed by the numbers from 0 to (n - r - 1).
- `{i // hA.eigenvalues i ≠ 0} ⊕ {i // ¬hA.eigenvalues i ≠ 0} ≃ n`: the index set of the matrix (together with the associated eigenvector matrix and eigenvalues matrix ) can be partitioned into two complement groups the ones corresponding to non-zero eigenvalues and the ones corresponding to zero eigenvalues.
- We can then put the previous definitions together to obtain a: `Fin (A.rank) ⊕ Fin (Fintype.card n - A.rank) ≃ n`
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-algebra
label:t-algebra$ |
31/0 |
Mathlib/LinearAlgebra/Matrix/Spectrum.lean |
1 |
0 |
[] |
nobody |
711-37055 1 year ago |
unknown |
0-0 0 seconds |
| 6791 |
eric-wieser author:eric-wieser |
refactor: Use flat structures for morphisms |
This restores the symmetry we had in Lean3, where we had `MonoidHom.mk f one mul` not `MonoidHom.mk (OneHom.mk f one) mul`, and `f.toFun` wasn't notation for `f.toMulHom.toFun`.
The nesting provided by the previous inheritance is useless to us in the face of `MonoidHomClass.toMonoidHom`, which completely eta-expands the structure anyway.
We call the class `FunLikeFlatHack._` because this means the field is called `to_` which uses up less space in the goal view than any alternative.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
help-wanted
awaiting-CI
|
174/201 |
Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Category/GroupCat/ZModuleEquivalence.lean,Mathlib/Algebra/Category/GroupWithZeroCat.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/MonCat/Basic.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/Hom/Equiv/Basic.lean,Mathlib/Algebra/Hom/Group/Defs.lean,Mathlib/Algebra/Hom/GroupAction.lean,Mathlib/Algebra/Hom/NonUnitalAlg.lean,Mathlib/Algebra/Hom/Ring/Defs.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Module/Equiv.lean,Mathlib/Algebra/Module/LinearMap.lean,Mathlib/Algebra/Order/Hom/Ring.lean,Mathlib/Algebra/Order/Interval.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Analysis/Normed/Group/SemiNormedGroupCat.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/Rat/Cast/CharZero.lean,Mathlib/Data/Real/EReal.lean,Mathlib/Data/Real/Sqrt.lean,Mathlib/GroupTheory/FreeAbelianGroup.lean,Mathlib/GroupTheory/MonoidLocalization.lean,Mathlib/LinearAlgebra/Quotient.lean,Mathlib/LinearAlgebra/TensorProduct.lean,Mathlib/RingTheory/RingInvo.lean,Mathlib/Topology/Algebra/Module/Basic.lean,Mathlib/Topology/MetricSpace/Dilation.lean |
32 |
0 |
[] |
nobody |
711-37055 1 year ago |
unknown |
0-0 0 seconds |
| 6930 |
kmill author:kmill |
feat: `resynth_instances` tactic for resynthesizing instances in the goal or local context |
This tactic can be useful for debugging non-canonical instances or for fixing up goals and hypotheses after using the `classical` tactic.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-meta
|
327/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ResynthInstances.lean,test/ResynthInstances.lean |
4 |
0 |
[] |
nobody |
711-37055 1 year ago |
unknown |
0-0 0 seconds |
| 6931 |
urkud author:urkud |
refactor(Analysis/Normed*): use `RingHomIsometric` for `*.norm_cast` |
---
I don't understand why linter fails.
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
help-wanted
t-analysis
|
78/68 |
Mathlib/Analysis/LocallyConvex/ContinuousOfBounded.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/NormedSpace/Basic.lean,Mathlib/Analysis/NormedSpace/Exponential.lean,Mathlib/Analysis/NormedSpace/Spectrum.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/NumberTheory/NumberField/Embeddings.lean |
8 |
0 |
[] |
nobody |
711-37055 1 year ago |
unknown |
0-0 0 seconds |
| 7225 |
jjaassoonn author:jjaassoonn |
some random stuff |
- Consider two commutative rings `R` and `S` and `X` and `(R, S)`-bimodule.
Consider the tensor functor `(X ⊗[R] .)` from the category of `R`-modules to the category of `S`-modules and the hom functor `X →ₗ[S] .` from the category of `S`-modules to the category of `R`-modules, they form an adjunction.
- direct limits of modules commute with tensor product
- A proof of 
Three definitions for flatness:
1. in terms of injectiveness
```lean
def Flat.injective : Prop :=
∀ ⦃N N' : ModuleCat.{u} R⦄ (L : N ⟶ N'),
Function.Injective L → Function.Injective ((tensorRight (ModuleCat.of R M)).map L)
```
2. in terms of ideals
```lean
def Flat.ideal : Prop :=
∀ (I : Ideal R), Function.Injective (TensorProduct.lift ((lsmul R M).comp I.subtype))
```
3. in terms of finitely generated ideal
```lean
def Flat.fg_ideal : Prop :=
∀ ⦃I : Ideal R⦄ (_ : I.FG), Function.Injective (TensorProduct.lift ((lsmul R M).comp I.subtype))
```
and they are all equivalent:
```lean
lemma tfae : List.TFAE
[ Flat.injective R M,
Flat.ideal R M,
Flat.fg_ideal R M ] := by
```
The dependencies between these changed files are:
```
Algebra.Module.LinearMap---------------------------------
| |
| |
v v
Algebra.Category.ModuleCat.TensorProduct -----> Algebra.Character
|
|
|
v
Algebra.DirectLimitAndTensorProduct -------------> RingTheory.Flat
```
to prove equivalence of other definitions, e.g. exact functor, tor, etc should be easier with this because the proof is will be categorical
---
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-------------
Some other stuff not about flatness
1. If $S$ is a submonoid and $I$ is maximally disjoint from $S$ then $I$ is prime
2. if $\mathfrak p$ is a minimal prime, then $x \in \mathfrak p$ implies that $x$ is a zero divisor
3. Noetherian rings has only finitely many minimal ideals
4. One version of [the prime avoidance lemma](https://en.wikipedia.org/wiki/Prime_avoidance_lemma): if $E$ is an addsubgroup of a ring and is mutiplicatively closed, and $\mathfrak p_i$ is some prime ideals, then not being any subset of the individual prime ideal implies that not being a subset of their union
----------
[](https://gitpod.io/from-referrer/)
|
merge-conflict |
1828/16 |
Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/TensorProduct.lean,Mathlib/Algebra/Character.lean,Mathlib/Algebra/DirectLimitAndTensorProduct.lean,Mathlib/Algebra/Module/LinearMap.lean,Mathlib/AlgebraicGeometry/PrimeSpectrum/Basic.lean,Mathlib/AlgebraicGeometry/PrimeSpectrum/Noetherian.lean,Mathlib/CategoryTheory/Functor/Fin.lean,Mathlib/CategoryTheory/ShortExactSequence.lean,Mathlib/RingTheory/Flat.lean,Mathlib/RingTheory/Ideal/Basic.lean,Mathlib/RingTheory/Ideal/MinimalPrime.lean,Mathlib/RingTheory/Ideal/PrimeAvoidance.lean |
13 |
6 |
['eric-wieser', 'jjaassoonn'] |
nobody |
711-37055 1 year ago |
unknown |
0-0 0 seconds |
| 7227 |
kmill author:kmill |
feat: flexible binders and integration into notation3 |
Introduces `flexibleBinders`, which is an extensible system for binder notations that allow destructuring, bounded domains, and other niceties. Integrates this into `notation3`, and makes `Finset.sum`/`Finset.prod` use it.
---
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- [ ] depends on: #6833
[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-meta
|
1215/131 |
Mathlib.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/BigOperators/NatAntidiagonal.lean,Mathlib/Mathport/Notation.lean,Mathlib/Util/FlexibleBinders.lean,Mathlib/Util/FlexibleBindersFinset.lean,Mathlib/Util/SyntaxFun.lean,test/FlexibleBinders.lean,test/notation3.lean |
10 |
3 |
['eric-wieser', 'kmill'] |
nobody |
711-37055 1 year ago |
unknown |
0-0 0 seconds |
| 7351 |
shuxuezhuyi author:shuxuezhuyi |
feat(Topology/Algebra/Order): extend function on `Ioo` to `Icc` |
Extend a strictly monotone function defined on an open interval.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-order
|
59/0 |
Mathlib.lean,Mathlib/Data/Set/Function.lean,Mathlib/Topology/Algebra/Order/IccExtendFromIoo.lean |
3 |
7 |
['j-loreaux', 'shuxuezhuyi'] |
nobody |
711-37055 1 year ago |
990-5883 990 days ago |
30-32706 30 days |
| 7467 |
ADedecker author:ADedecker |
feat: spectrum of X →ᵇ ℂ is StoneCech X |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-analysis
|
121/23 |
Mathlib/Analysis/NormedSpace/Star/BoundedContinuousFunction.lean,Mathlib/Analysis/NormedSpace/Star/GelfandDuality.lean,Mathlib/Topology/ContinuousFunction/Bounded.lean,Mathlib/Topology/ContinuousFunction/Compact.lean |
4 |
1 |
['github-actions'] |
nobody |
711-37055 1 year ago |
unknown |
0-0 0 seconds |
| 7512 |
Komyyy author:Komyyy |
perf: override the data structures of coinductive types |
The data structures of the model of coinductive types (`Stream'`, `Computation`, `Stream'.Seq`) are inefficient, so we override their data structures.
---
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- [x] depends on: #7514
- [ ] depends on: leanprover/lean4#2292
- [x] depends on: leanprover/std4#371
- [x] depends on: #8460
[](https://gitpod.io/from-referrer/)
|
WIP
blocked-by-core-PR
blocked-by-other-PR
merge-conflict
t-meta
|
6919/3700 |
Mathlib.lean,Mathlib/Algebra/ContinuedFractions/Basic.lean,Mathlib/Algebra/ContinuedFractions/Computation/ApproximationCorollaries.lean,Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/ContinuedFractions/Computation/Basic.lean,Mathlib/Algebra/ContinuedFractions/Computation/CorrectnessTerminating.lean,Mathlib/Algebra/ContinuedFractions/Computation/TerminatesIffRat.lean,Mathlib/Algebra/ContinuedFractions/Computation/Translations.lean,Mathlib/Algebra/ContinuedFractions/ContinuantRecurrence.lean,Mathlib/Algebra/ContinuedFractions/EvalEquiv.lean,Mathlib/Algebra/ContinuedFractions/Real.lean,Mathlib/Algebra/ContinuedFractions/TerminatedStable.lean,Mathlib/Algebra/ContinuedFractions/Translations.lean,Mathlib/Combinatorics/Hindman.lean,Mathlib/Control/Fix.lean,Mathlib/Control/LawfulFix.lean,Mathlib/Data/Seq/Computation.lean,Mathlib/Data/Seq/Parallel.lean,Mathlib/Data/Seq/Seq.lean,Mathlib/Data/Seq/WSeq.lean,Mathlib/Data/Stream.lean,lean-toolchain |
22 |
2 |
['digama0'] |
nobody |
711-37055 1 year ago |
unknown |
0-0 0 seconds |
| 7564 |
shuxuezhuyi author:shuxuezhuyi |
feat(Topology/Algebra/Order): extend strictly monotone function on `Ioo` to homeomorphism on `Icc` |
A strictly monotone function between open intervals can be extended to a homeomorphism between the closed intervals.
---
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- [ ] depends on: #7351
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-topology
blocked-by-other-PR
|
162/0 |
Mathlib.lean,Mathlib/Topology/Algebra/Order/IccExtendFromIoo.lean |
2 |
1 |
[] |
nobody |
711-37055 1 year ago |
1009-24287 1009 days ago |
0-537 8 minutes |
| 7601 |
digama0 author:digama0 |
feat: ring hom support in `ring` |
As [requested on Zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/aroots/near/395750055). Adds support for distributing ring morphisms in `ring`:
```lean
example (p : ℤ[X]) (r : ℤ) : C (2 * r) * p = C r * p + C r * p := by ring
```
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-algebra
t-meta
label:t-algebra$ |
257/48 |
Mathlib/Tactic/Ring/Basic.lean,test/linear_combination.lean,test/ring.lean |
3 |
1 |
['eric-wieser'] |
nobody |
711-37055 1 year ago |
944-20658 944 days ago |
62-28836 62 days |
| 7835 |
shuxuezhuyi author:shuxuezhuyi |
feat(LinearAlgebra/Matrix): `lift` for projective special linear group |
We provide converters to help with the use of "quotient.liftOn" on projective special linear groups.
---
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- [x] depends on: #7826
- [x] depends on: #7791
[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-algebra
label:t-algebra$ |
52/0 |
Mathlib/LinearAlgebra/Matrix/ProjectiveSpecialLinearGroup.lean |
1 |
3 |
['jcommelin', 'shuxuezhuyi'] |
jcommelin assignee:jcommelin |
711-37055 1 year ago |
857-46886 857 days ago |
1-85797 1 day |
| 7875 |
astrainfinita author:astrainfinita |
chore: make `SMulCommClass A A B` and `SMulCommClass A B B` higher priority |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
slow-typeclass-synthesis
t-algebra
label:t-algebra$ |
54/48 |
Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/Ring/CentroidHom.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Analysis/Complex/UnitDisc/Basic.lean,Mathlib/Analysis/NormedSpace/lpSpace.lean,Mathlib/Data/Matrix/Basic.lean,Mathlib/GroupTheory/GroupAction/Prod.lean,Mathlib/GroupTheory/GroupAction/Ring.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean,Mathlib/GroupTheory/MonoidLocalization.lean,Mathlib/GroupTheory/Submonoid/Center.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/RingTheory/Ideal/Quotient.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/Topology/ContinuousFunction/ContinuousMapZero.lean,Mathlib/Topology/ContinuousFunction/StoneWeierstrass.lean,Mathlib/Topology/ContinuousFunction/ZeroAtInfty.lean |
27 |
15 |
['Parcly-Taxel', 'astrainfinita', 'jcommelin', 'leanprover-bot'] |
nobody |
711-37055 1 year ago |
765-53563 765 days ago |
1-47913 1 day |
| 7932 |
eric-wieser author:eric-wieser |
refactor(Algebra/TrivSqZeroExt): replace with a structure |
This is dogfooding my claim that "one-field structures are the lesser evil in Lean 4".
This runs into the `simp [(stupid_parens)]` bug; or rather, a particular nasty instance of it where the offending simp call is inside `@[simps]`.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
awaiting-CI
label:t-algebra$ |
155/73 |
Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/TrivSqZeroExt.lean,Mathlib/Logic/Equiv/TransferInstance.lean,Mathlib/Topology/Instances/TrivSqZeroExt.lean |
4 |
1 |
['github-actions'] |
nobody |
711-37055 1 year ago |
unknown |
0-0 0 seconds |
| 7962 |
eric-wieser author:eric-wieser |
feat: `DualNumber (Quaternion R)` as a `CliffordAlgebra` |
This provides a clifford algebra isomorphic to the dual quaternions
---
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- [x] depends on: #7934
[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-algebra
label:t-algebra$ |
307/7 |
Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/QuaternionBasis.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Equivs.lean |
3 |
16 |
['github-actions'] |
nobody |
711-37055 1 year ago |
unknown |
0-0 0 seconds |
| 8364 |
thorimur author:thorimur |
feat: `refine?` |
This PR adds `refine? e`, which suggests replacing unsynthesized `_`'s in `e` with `?_` in order to make `refine e'` work:
```lean
example : Nat → Nat := by
refine? fun (_ : _) => _ -- Try this: refine fun (_ : _) => ?_
```
Note that this only suggests replacements for `_`'s present in the syntax; to create goals for implicit or instance arguments, the user is expected to use `refine'`.
---
I'm especially open to suggestions on the filename (currently `RefineFix`).
I'm also curious if this behaves as expected! Feel free to try it out "in real life" and comment here on edge cases.
<!-- The text above the `---` will become the commit message when your
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- [ ] depends on: #8503
[](https://gitpod.io/from-referrer/)
|
merge-conflict
blocked-by-other-PR
t-meta
|
684/5 |
Mathlib.lean,Mathlib/Lean/CoreM.lean,Mathlib/Lean/Elab/Tactic/ElabTerm.lean,Mathlib/Lean/Elab/Term.lean,Mathlib/Tactic.lean,Mathlib/Tactic/RefineFix.lean,Mathlib/Util/Delaborators.lean,Mathlib/Util/Syntax.lean,test/RefineFix.lean |
9 |
5 |
['j-loreaux', 'thorimur'] |
nobody |
711-37055 1 year ago |
966-57189 966 days ago |
6-59892 6 days |
| 3575 |
Kha author:Kha |
perf: selectively enable precompilation |
---
This is an initial performance test on Linux. TODO:
- [ ] test on macOS and Windows as well
- [ ] adapt caching |
merge-conflict
WIP
|
3/0 |
lakefile.lean |
1 |
21 |
['Kha', 'kim-em', 'leanprover-bot', 'tydeu'] |
nobody |
711-37054 1 year ago |
unknown |
0-0 0 seconds |
| 4771 |
thorimur author:thorimur |
feat: Backtrack minimize |
Utilities for backtracking in order to attain a minimum according to some arbitrary notion of size when generating lists of parts and alternatives in alternating fashion. Motivated by minimizing the number of generated subgoals under apply-like actions on the goal.
---
<!-- The text above the `---` will become the commit message when your
PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-meta
|
482/1 |
Mathlib/Tactic/Backtracking.lean,test/Backtracking.lean |
2 |
0 |
[] |
nobody |
711-37054 1 year ago |
unknown |
0-0 0 seconds |
| 4775 |
thorimur author:thorimur |
feat: `SubExpr` utilities |
This file contains utilities for handling positions in expressions, including folding over subexpressions along with their positions.
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-meta
|
148/0 |
Mathlib.lean,Mathlib/Lean/SubExpr.lean |
2 |
0 |
[] |
nobody |
711-37054 1 year ago |
unknown |
0-0 0 seconds |
| 4785 |
thorimur author:thorimur |
feat: ExprWithLevels |
This introduces `ExprWithLevels`, a means of emulating universe polymorphism for non-constants during metaprogramming. [Description pending]
- [ ] depends on: #4786
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
blocked-by-other-PR
t-meta
|
491/1 |
Mathlib.lean,Mathlib/Lean/Meta/AppBuilder.lean,Mathlib/Lean/Meta/Basic.lean,Mathlib/Lean/Meta/ExprWithLevels.lean |
4 |
1 |
['kim-em'] |
nobody |
711-37054 1 year ago |
unknown |
0-0 0 seconds |
| 4871 |
j-loreaux author:j-loreaux |
feat: define the additive submonoid of positive elements in a star ordered ring |
This file defines the `AddSubmonoid` of nonegative elements `StarOrderedRing.positive R` in a star ordered ring `R` with carrier `{ x : R | 0 ≤ x }` (in fact, the definition only requires `OrderedAddCommMonoid R` to allow for other use cases, but it is primarily intended for `StarOrderedRing R`). Equivalently, this is the `AddSubmonoid` generated by the elements of the form `star s * s`. Even though this technically corresponds to the nonnegative elements, the "positive" terminology is standard throughout the literature (at least in C⋆-algebra theory and operator theory), so we choose to prefer that.
The advantage of using this over other definitions of positivity is that it allows us to unify several different concepts under a single umbrella. For example, one might be tempted to consider the collection of bounded linear operators on an Hilbert space and define positivity as `∀ x, 0 ≤ ⟪T x, x⟫`, but this doesn't generalize nicely to C⋆-algebras. Alternatively, one could define positivity as those self-adjoint elements with nonnegative spectrum, but this requires the algebra to be unital. Our definition herein conveniently sidesteps these issues.
---
Note: I declared the `AddMonoidWithOne` and `AddGroupWithOne` instances for `selfAdjoint R` separately because it made the proof of the latter easier.
- [x] depends on: #6229
- [x] depends on: #10209
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
awaiting-CI
label:t-algebra$ |
216/12 |
Mathlib.lean,Mathlib/Algebra/Order/Ring/CharZero.lean,Mathlib/Algebra/Star/Order.lean,Mathlib/Algebra/Star/Positive.lean,Mathlib/Algebra/Star/SelfAdjoint.lean,Mathlib/GroupTheory/Submonoid/Operations.lean |
6 |
28 |
['eric-wieser', 'j-loreaux'] |
nobody |
711-37054 1 year ago |
1124-23106 1124 days ago |
5-55287 5 days |
| 5133 |
kmill author:kmill |
feat: IntermediateField adjoin syntax for sets of elements |
Adds support for both `F⟮S⟯` and `F⟮α⟯`. The term `x` in `F⟮x⟯` is elaborated, and if it has type `Set _` the first interpretation is used, and otherwise the second is.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-algebra
label:t-algebra$ |
110/55 |
Mathlib/FieldTheory/Adjoin.lean |
1 |
0 |
[] |
nobody |
711-37054 1 year ago |
1122-38180 1122 days ago |
0-20 20 seconds |
| 5912 |
ADedecker author:ADedecker |
feat(Analysis.Distribution.ContDiffMapSupportedIn): space of smooth maps with support in a fixed compact |
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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- [ ] depends on: #xyz [optional extra text]
-->
[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-analysis
|
513/13 |
Mathlib.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/Set/Function.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean,Mathlib/Topology/ContinuousFunction/Bounded.lean |
8 |
0 |
[] |
nobody |
711-37054 1 year ago |
unknown |
0-0 0 seconds |
| 6002 |
slerpyyy author:slerpyyy |
feat(Analysis.SpecialFunctions.Gaussian): add `integrable_fun_mul_exp_neg_mul_sq` |
If `f : ℝ → ℝ` is bounded by a polynomial, `fun x : ℝ => f x * exp (-b * x ^ 2)` is integrable.
---
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- [ ] depends on: #xyz [optional extra text]
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-analysis
|
26/0 |
Mathlib/Analysis/SpecialFunctions/Gaussian.lean |
1 |
3 |
['ocfnash', 'slerpyyy', 'urkud'] |
nobody |
711-37054 1 year ago |
1079-37416 1079 days ago |
9-71263 9 days |
| 6195 |
eric-wieser author:eric-wieser |
chore(RingTheory/TensorProduct): golf the `mul` definition |
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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- [x] depends on: #6211
- [x] depends on: #6187
[](https://gitpod.io/from-referrer/)
Strangely this causes a timeout downstream
|
merge-conflict
t-algebra
awaiting-CI
label:t-algebra$ |
4/29 |
Mathlib/RingTheory/TensorProduct.lean |
1 |
1 |
[] |
nobody |
711-37054 1 year ago |
unknown |
0-0 0 seconds |
| 6307 |
yuma-mizuno author:yuma-mizuno |
refactor(CategoryTheory/Monoidal): add whiskering operators |
We introduce whiskering operators. This allows us to introduce a simp-normal form for morphisms in monoidal categories. Rewriting into simp-normal forms is especially useful when combined with the coherence tactic.
---
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- [ ] depends on: #xyz [optional extra text]
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- [x] depends on: #6420
- [x] depends on: #8191
- [x] depends on: #9988
- [x] depends on: #9991
- [x] depends on: #9995
- [x] depends on: #10061
- [x] depends on: #10078
- [x] depends on: #10898
- [x] depends on: #10912
- [x] depends on: #11223
[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-category-theory
|
325/280 |
Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/CategoryTheory/Bicategory/End.lean,Mathlib/CategoryTheory/Closed/Ideal.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Free/Coherence.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/Limits.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/NaturalTransformation.lean,Mathlib/CategoryTheory/Monoidal/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,test/CategoryTheory/Coherence.lean |
15 |
38 |
['eric-wieser', 'github-actions', 'grunweg', 'jcommelin', 'kim-em', 'yuma-mizuno'] |
nobody |
711-37054 1 year ago |
850-3328 850 days ago |
60-84345 60 days |
| 6328 |
astrainfinita author:astrainfinita |
chore: make some instance about `Sub...Class` lower priority |
Many similar instances have been marked as lower priority. I'd like to see if this would make things faster.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-algebra
awaiting-CI
label:t-algebra$ |
14/14 |
Mathlib/RingTheory/NonUnitalSubsemiring/Basic.lean,Mathlib/RingTheory/Subsemiring/Basic.lean,lean-toolchain |
3 |
1 |
['digama0'] |
nobody |
711-37054 1 year ago |
unknown |
0-0 0 seconds |
| 6330 |
astrainfinita author:astrainfinita |
chore: make some instance about `Sub...Class` higher priority than `Sub...` |
The opposite direction to #6328.
---
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|
merge-conflict
WIP
t-algebra
slow-typeclass-synthesis
label:t-algebra$ |
123/128 |
Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/FieldTheory/IsAlgClosed/Basic.lean,Mathlib/FieldTheory/Subfield.lean,Mathlib/RingTheory/NonUnitalSubring/Basic.lean,Mathlib/RingTheory/NonUnitalSubsemiring/Basic.lean,Mathlib/RingTheory/Polynomial/Quotient.lean,Mathlib/RingTheory/Subring/Basic.lean,Mathlib/RingTheory/Subsemiring/Basic.lean,lean-toolchain |
11 |
13 |
['astrainfinita', 'digama0', 'leanprover-bot'] |
nobody |
711-37054 1 year ago |
unknown |
0-0 0 seconds |
| 6491 |
eric-wieser author:eric-wieser |
chore(Mathlib/Algebra/Hom/GroupAction): add `SMulHomClass.comp_smul` |
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
label:t-algebra$ |
24/10 |
Mathlib/Algebra/Hom/GroupAction.lean |
1 |
0 |
[] |
nobody |
711-37054 1 year ago |
983-23054 983 days ago |
83-76369 83 days |
| 7076 |
grunweg author:grunweg |
feat: define measure zero subsets of a manifold |
A topological manifold has no canonical measure, but there is a canonical notion of measure zero subsets.
We show that these are closed under subsets and countable unions (hence define a filter, the almost everywhere filter)
and that a closed nowhere dense has empty interior.
This is necessary for stating the general version of Sard's theorem (in finite dimensions), and a first step towards its proof.
This code was written at LftCM 2023. Thanks for @fpvandoorn for mentoring me! :heart:
---
Unresolved questions/looking for feedback
- Is "measure zero" a good name or would "null set" be better? I tend towards the former, but welcome input from a measure theorist (which I'm not).
- What is the correct definition? One could also define "measure zero" using any `IsOpenPosMeasure` on the charted space.
I think all results in this file still hold then, but for applications (e.g., Sard's theorem), this might be too general.
- define custom notation, similar to the a.e. filter on a measure space? (We could include $J$ instead of $\mu$.)
- what's the right syntax for formulas in docstrings --- use LaTeX or backticks? I don't know how to preview the generated docs, the guidelines are a bit ambiguous for me.
|
merge-conflict
WIP
t-differential-geometry
t-measure-probability
|
165/0 |
Mathlib.lean,Mathlib/Geometry/Manifold/MeasureZero.lean,docs/references.bib |
3 |
27 |
['ADedecker', 'github-actions', 'grunweg', 'mo271', 'sgouezel'] |
ADedecker assignee:ADedecker |
711-37054 1 year ago |
866-34363 866 days ago |
43-56110 43 days |
| 3757 |
thorimur author:thorimur |
feat: config options for `fail_if_no_progress` |
This PR creates config options for `fail_if_no_progress` that allow the user to tweak what exactly counts as "progress". This includes whether to use defeq or `BEq`, what transparency to use, and which parts of the goal and local context to check.
It also splits off the comparison functionality into `Mathlib.Lean.Meta.Compare`, which provides fully configurable comparison functions for common complex metaprogramming types not specific to `fail_if_no_progress`. These types are `Expr`, `LocalDecl`, `LocalContext`, `MetavarDecl`, `MVarId`, and `List MVarId`.
---
See [zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/progress.20on.20fail_if_no_progress) for a couple review questions.
Status update: this PR is now basically done, save for some extra tests which should probably be included.
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-meta
|
603/54 |
Mathlib.lean,Mathlib/Lean/Meta.lean,Mathlib/Lean/Meta/Compare.lean,Mathlib/Tactic/FailIfNoProgress.lean,test/fail_if_no_progress.lean |
5 |
38 |
['alexjbest', 'github-actions', 'joneugster', 'kim-em', 'thorimur'] |
nobody |
711-37053 1 year ago |
1168-1735 1168 days ago |
0-15 15 seconds |
| 12353 |
thorimur author:thorimur |
feat: `conv%` |
This PR introduces `conv% e => tac`, along with `simp%`, `norm_num%`, and `push_neg%`, which are defined in terms of `conv%`.
It also introduces `conv%?` (and `simp%?`, `norm_num%?`, and `push_neg%?`) as shortcuts for `show_term ...`.
This is a relatively straightforward refactor of code already present in the implementation of `#conv`, and otherwise relies entirely on simple macros.
This PR also introduces some modifications to existing command syntax for `#conv`, `#simp`, and `#norm_num`:
* The syntax for `#conv` was `#conv tac => e`; however, this is inconsistent with the tactic syntax, and so this has been flipped to `#conv e => tac`. Likewise, `conv%` uses the same (new) syntax `conv% e => tac`.
* `#simp` and `#norm_num` separated their config and `only` syntax from the expression by an optional `=>` (for `#simp`) and an optional `:` (for `#norm_num`) (e.g. `#simp only [lem] => e`). These have both been replaced with an optional`on` (e.g. `#simp only [lem] on e`) which is also used for `simp%` and `norm_num%`.
Although `#whnf` is implemented in terms of `#conv`, this PR doesn't introduce `whnf%` in the same way, as that's probably better off being implemented directly instead of through `conv`.
---
WIP: needs tests.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-meta
|
131/32 |
Mathlib/Tactic/Conv.lean,Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/PushNeg.lean,docs/Conv/Guide.lean |
4 |
0 |
[] |
nobody |
707-13363 1 year ago |
810-51405 810 days ago |
0-17 17 seconds |
| 13852 |
astrainfinita author:astrainfinita |
perf: skip some typeclasses in TC search |
---
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- [ ] depends on: #7873
[](https://gitpod.io/from-referrer/)
|
merge-conflict
slow-typeclass-synthesis
blocked-by-other-PR
|
45/33 |
Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/RingTheory/Norm.lean |
3 |
21 |
['MichaelStollBayreuth', 'astrainfinita', 'github-actions', 'leanprover-bot'] |
nobody |
707-7043 1 year ago |
unknown |
0-0 0 seconds |
| 7903 |
urkud author:urkud |
feat: define `UnboundedSpace` |
---
The new instances generate some timeouts, and I don't understand why.
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
help-wanted
t-topology
|
111/59 |
Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Topology/Bornology/Basic.lean,Mathlib/Topology/Bornology/Constructions.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/GromovHausdorffRealized.lean |
6 |
1 |
['github-actions'] |
nobody |
704-25032 1 year ago |
unknown |
0-0 0 seconds |
| 15679 |
adomani author:adomani |
test: refactor in CI |
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
|
213/5 |
.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,Mathlib.lean,Mathlib/Algebra/Homology/HomotopyCategory/SingleFunctors.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unique.lean,Mathlib/Analysis/Convex/Combination.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/CategoryTheory/Bicategory/Adjunction.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/GroupTheory/Coxeter/Matrix.lean,Mathlib/Order/Filter/Cocardinal.lean,Mathlib/Order/UpperLower/Basic.lean,Mathlib/TestRefactor.lean,Refactor/Main.lean,lakefile.lean,lean-toolchain |
21 |
1 |
['github-actions'] |
nobody |
698-80608 1 year ago |
701-3650 701 days ago |
0-8 8 seconds |
| 7565 |
shuxuezhuyi author:shuxuezhuyi |
feat(Topology/Algebra/Order): extend homeomorphism of `Ioo` to `Icc` |
We extend the homeomorphisms between open intervals to homeomorphisms between the closed intervals.
---
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- [ ] depends on: #7018
- [ ] depends on: #7351
- [ ] depends on: #7564
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-topology
blocked-by-other-PR
t-order
|
389/5 |
Mathlib.lean,Mathlib/Data/Set/Intervals/Image.lean,Mathlib/Order/Directed.lean,Mathlib/Topology/Algebra/Order/IccExtendFromIoo.lean,Mathlib/Topology/Algebra/Order/IntermediateValue.lean |
5 |
1 |
[] |
nobody |
697-30708 1 year ago |
1009-11587 1009 days ago |
0-222 3 minutes |
| 10629 |
madvorak author:madvorak |
feat: List.cons_sublist_append_iff_right |
---
<!-- The text above the `---` will become the commit message when your
PR is merged. Please leave a blank newline before the `---`, otherwise
GitHub will format the text above it as a title.
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-data
|
11/0 |
Mathlib/Data/List/Basic.lean |
1 |
1 |
['eric-wieser'] |
nobody |
697-30599 1 year ago |
823-39436 823 days ago |
53-73442 53 days |
| 9973 |
Ruben-VandeVelde author:Ruben-VandeVelde |
feat: polynomials formed by lists |
From https://github.com/leanprover-community/mathlib/pull/15476
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
please-adopt
merge-conflict
t-data
|
311/0 |
Mathlib.lean,Mathlib/Data/Polynomial/OfList.lean |
2 |
0 |
[] |
nobody |
697-30132 1 year ago |
unknown |
0-0 0 seconds |
| 12926 |
joelriou author:joelriou |
feat(CategoryTheory): the monoidal category structure induced by a monoidal functor |
In this PR, given a monoidal functor `F : MonoidalFunctor C D`, we define a monoidal category structure on the category `InducedCategory D F.obj`, which has the "same" objects as `C`, but the morphisms between `X` and `Y` identify to `F.obj X ⟶ F.obj Y`.
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-category-theory
|
105/0 |
Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Induced.lean |
2 |
3 |
['eric-wieser', 'github-actions', 'joelriou'] |
nobody |
697-28531 1 year ago |
788-33736 788 days ago |
0-10 10 seconds |
| 12869 |
adomani author:adomani |
feat: linter and script for `theorem` vs `lemma` |
This PR contains a linter for flagging doc-string-less `theorem`s, as well as a bash script that, once the linter ran on Mathlib, automatically replaces every linter-offending `theorem` by `lemma`.
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
GitHub will format the text above it as a title.
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-linter
awaiting-author
|
106/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/ThmLemma.lean,scripts/thmLemma.sh |
4 |
13 |
['adomani', 'github-actions', 'grunweg', 'joneugster'] |
nobody |
697-15295 1 year ago |
751-35790 751 days ago |
38-16364 38 days |
| 14563 |
awueth author:awueth |
feat: if-then-else of exclusive or statement |
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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If `¬(P ∧ Q)` then `ite (P ∨ Q) a 1 = (ite P a 1) * (ite Q a 1)`
[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-algebra
new-contributor
label:t-algebra$ |
5/0 |
Mathlib/Algebra/Group/Basic.lean |
1 |
3 |
['eric-wieser', 'github-actions', 'kim-em'] |
nobody |
696-29447 1 year ago |
726-76429 726 days ago |
6-38745 6 days |
| 14308 |
grhkm21 author:grhkm21 |
feat(Algebra/Category): Direct construction of colimits in algebraic categories |
(Below I only write about colimits since that's what I'm familiar with after working on it the last few days, but maybe it's the same for other categorical constructions)
**Main feature:** Construct colimits in `AddCommGrp`/`ModuleCat`/`FGModuleCat`(/...) directly as coequalizer (i.e. cokernel i.e. quotient) of two maps, allowing one to say $\coprod_j M_j \cong *$
Currently, if you look at how colimits are constructed for [AddCommGrp](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Algebra/Category/Grp/Colimits.lean#L69-L92), you see this massive block of code of all relations generating the quotient relation, but that's kind of bad, you can't say anything concretely about it.
Also as noted in the TODOs of a few files:
```
TODO:
In fact, in `ModuleCat R` there is a much nicer model of colimits as quotients
of finitely supported functions, and we really should implement this as well.
```
I wrote it down [here](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Braided.20left.20rigid.20categories.20are.20right.20rigid/near/447490672), and **have formalised it** in a small file already [here](https://gist.github.com/grhkm21/5b2d938753c0ce0900d21c93a39e3b7d#file-addcommgrpcolimits-lean-L162-L163) (I also have a `ModuleCat` version, and proving existence of colimits in `FGModuleCat` from it).
Usually I will try to merge the file into Mathlib directly (preferably in one sitting), but I have been trying for a while now and been struggling. One issue is I am struggling to understand universes, which I asked [here](https://leanprover.zulipchat.com/#narrow/stream/113489-new-members/topic/Universe.20constraints!/near/448049266) along with many other places. A more concrete issue is that
- [ ] FGModuleCat (and `FullSubcategory` in general) requires morphism and objects to be on the same universe, whereas generally `Category.{v, u}` don't.
So that seems to limit what I can express, and maybe I have to fix it first.
Here are a few more TODOs just so I don't forget, probably done before the one above:
- [ ] Generalise `cokernelIsoQuotient` to other categories.
- [ ] Also prove `coproductIsoDirectSum`
- [ ] Also prove coequalizer (f + h) (g + h) ~ coequalizer f g ~ cokernel (f - g) 0
- [ ] Fix typo `FGModuleCatCat`
If anyone is familiar with universe stuff and can answer my many questions that'll be great too. I need help understanding just [these five lines](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Algebra/Category/Grp/Colimits.lean#L267-L271) |
merge-conflict
WIP
t-algebra
label:t-algebra$ |
10/3 |
Mathlib/Algebra/DirectSum/Module.lean,Mathlib/LinearAlgebra/FreeModule/Basic.lean |
2 |
1 |
['github-actions'] |
nobody |
696-27316 1 year ago |
741-61993 741 days ago |
0-23 23 seconds |
| 13010 |
ADedecker author:ADedecker |
feat: relax universe constraint in stoneCechExtend |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-topology
|
33/3 |
Mathlib/Topology/StoneCech.lean |
1 |
2 |
['ADedecker', 'erdOne'] |
nobody |
696-27113 1 year ago |
unknown |
0-0 0 seconds |
| 12411 |
adomani author:adomani |
feat: more linting of cdots |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-linter
|
953/617 |
Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib.lean,Mathlib/Algebra/Category/GroupCat/Colimits.lean,Mathlib/Algebra/Homology/Exact.lean,Mathlib/Algebra/Homology/LocalCohomology.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Module/PID.lean,Mathlib/Algebra/Module/Submodule/Bilinear.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/Order/Archimedean.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/InverseFunctionTheorem/ApproximatesLinearOn.lean,Mathlib/Analysis/Calculus/LocalExtr/Basic.lean,Mathlib/Analysis/Calculus/TangentCone.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Analysis/MeanInequalitiesPow.lean,Mathlib/Analysis/Normed/Group/ControlledClosure.lean,Mathlib/Analysis/Normed/Group/Pointwise.lean,Mathlib/Analysis/NormedSpace/FiniteDimension.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Separation.lean,Mathlib/Analysis/NormedSpace/Multilinear/Basic.lean,Mathlib/Analysis/NormedSpace/Star/Basic.lean,Mathlib/Analysis/NormedSpace/Star/Multiplier.lean,Mathlib/Analysis/NormedSpace/lpSpace.lean,Mathlib/Analysis/PSeries.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean,Mathlib/Analysis/SpecialFunctions/Log/Base.lean,Mathlib/Analysis/SpecialFunctions/Log/Monotone.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/CategoryTheory/Abelian/Basic.lean,Mathlib/CategoryTheory/Action.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation.lean,Mathlib/CategoryTheory/Category/Cat/Limit.lean,Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/CategoryTheory/Category/TwoP.lean,Mathlib/CategoryTheory/Closed/Cartesian.lean,Mathlib/CategoryTheory/Functor/Flat.lean,Mathlib/CategoryTheory/Galois/GaloisObjects.lean,Mathlib/CategoryTheory/Limits/Over.lean,Mathlib/CategoryTheory/Limits/VanKampen.lean,Mathlib/CategoryTheory/Localization/Predicate.lean,Mathlib/CategoryTheory/Monad/Coequalizer.lean,Mathlib/CategoryTheory/Monad/Monadicity.lean,Mathlib/CategoryTheory/Pi/Basic.lean,Mathlib/CategoryTheory/Sites/DenseSubsite.lean,Mathlib/CategoryTheory/Sites/InducedTopology.lean,Mathlib/CategoryTheory/Subobject/Lattice.lean,Mathlib/Combinatorics/Additive/PluenneckeRuzsa.lean,Mathlib/Combinatorics/HalesJewett.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Chunk.lean,Mathlib/Computability/Reduce.lean,Mathlib/Data/Holor.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Nat/Pairing.lean,Mathlib/Data/Real/Cardinality.lean,Mathlib/Data/Real/Hyperreal.lean,Mathlib/Data/Real/Irrational.lean,Mathlib/Data/Set/Card.lean,Mathlib/Dynamics/Circle/RotationNumber/TranslationNumber.lean,Mathlib/FieldTheory/Finite/Polynomial.lean,Mathlib/FieldTheory/Minpoly/IsIntegrallyClosed.lean,Mathlib/FieldTheory/PerfectClosure.lean,Mathlib/FieldTheory/RatFunc.lean,Mathlib/Geometry/RingedSpace/OpenImmersion.lean,Mathlib/Geometry/RingedSpace/PresheafedSpace/Gluing.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/Perm/Cycle/Factors.lean,Mathlib/GroupTheory/Perm/Finite.lean,Mathlib/GroupTheory/SpecificGroups/Quaternion.lean,Mathlib/GroupTheory/Sylow.lean,Mathlib/LinearAlgebra/Dimension/RankNullity.lean,Mathlib/LinearAlgebra/Dual.lean,Mathlib/LinearAlgebra/LinearIndependent.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Coeff.lean,Mathlib/LinearAlgebra/Prod.lean,Mathlib/LinearAlgebra/QuadraticForm/Complex.lean,Mathlib/LinearAlgebra/Reflection.lean,Mathlib/MeasureTheory/Constructions/Pi.lean,Mathlib/MeasureTheory/Covering/VitaliFamily.lean,Mathlib/MeasureTheory/Measure/Haar/Basic.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/Typeclasses.lean,Mathlib/MeasureTheory/OuterMeasure/Basic.lean,Mathlib/ModelTheory/Skolem.lean,Mathlib/NumberTheory/Dioph.lean,Mathlib/NumberTheory/LegendreSymbol/Basic.lean,Mathlib/NumberTheory/Padics/Hensel.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/Padics/RingHoms.lean,Mathlib/NumberTheory/RamificationInertia.lean,Mathlib/RingTheory/AdjoinRoot.lean |
147 |
2 |
['adomani', 'leanprover-bot'] |
nobody |
696-26976 1 year ago |
unknown |
0-0 0 seconds |
| 12279 |
casavaca author:casavaca |
WIP: feat: Holder's inequality n-ary |
---
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<!-- This is https://artofproblemsolving.com/wiki/index.php/H%C3%B6lder%27s_Inequality -->
- [x] depends on #12291
[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-analysis
|
129/0 |
Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean |
2 |
13 |
['github-actions'] |
nobody |
696-26961 1 year ago |
813-1666 813 days ago |
0-50185 13 hours |
| 12093 |
ADedecker author:ADedecker |
feat: tweak the definition of semicontinuity to behave better in nonlinear orders |
Summary of the changes:
- change definitions to make [lowerSemicontinuous_iff_isClosed_preimage](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Semicontinuous.html#lowerSemicontinuous_iff_isClosed_preimage) true without assuming `LinearOrder`, so that semicontinuity corresponds to continuity for lower/upper order topology on the codomain. See discussion on [Zulip](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Semicontinuity.20definition.20for.20non-linear.20orders/near/432898278)
- add new `iff` lemmas for unfolding the definition
- add `iff` lemmas with the old definition in the linearly ordered case
- some basic lemmas need to be changed in an easy way
- minimize assumptions for continuity => semicontinuity
- prove the semicontinuity criterion for indicators using "preimage of Ici/Iic" instead of a direct proof, because the proof is more natural (especially because we have no `filter_upwards` for `Frequently`)
- in the rest of the file (which is about linear orders anyway), we don't touch the statements and just rewrite to the old definition. Some of these could be generalized, but we keep that for a later PR.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-topology
|
274/130 |
Mathlib/Analysis/BoundedVariation.lean,Mathlib/MeasureTheory/Integral/FundThmCalculus.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Topology/Semicontinuous.lean |
4 |
0 |
[] |
nobody |
696-26923 1 year ago |
unknown |
0-0 0 seconds |
| 11520 |
thorimur author:thorimur |
feat: `linting_rules` and deprecated syntax |
---
Experimental. WIP. Might not be performance-viable.
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- [ ] depends on: #11519
[](https://gitpod.io/from-referrer/)
|
merge-conflict
blocked-by-other-PR
t-meta
|
1016/0 |
Mathlib.lean,Mathlib/Command/Linter.lean,Mathlib/Command/Linter/Deprecated.lean,Mathlib/Command/Linter/LintingRules.lean,Mathlib/Command/SyntaxRules.lean,Mathlib/Command/SyntaxRules/Attr.lean,Mathlib/Command/SyntaxRules/Elab.lean,Mathlib/Command/SyntaxRules/Header.lean,Mathlib/Command/SyntaxRules/Util.lean,Mathlib/Tactic/Common.lean,scripts/noshake.json |
11 |
11 |
['leanprover-bot', 'thorimur'] |
nobody |
696-26913 1 year ago |
unknown |
0-0 0 seconds |
| 11519 |
thorimur author:thorimur |
feat: `syntax_rules` |
---
Experimental. WIP.
<!-- The text above the `---` will become the commit message when your
PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-meta
|
485/0 |
Mathlib.lean,Mathlib/Command/SyntaxRules.lean,Mathlib/Command/SyntaxRules/Attr.lean,Mathlib/Command/SyntaxRules/Elab.lean,Mathlib/Command/SyntaxRules/Header.lean,Mathlib/Command/SyntaxRules/Util.lean,scripts/noshake.json |
7 |
0 |
[] |
nobody |
696-26899 1 year ago |
unknown |
0-0 0 seconds |
| 11393 |
mcdoll author:mcdoll |
feat(Analysis/Distribution/SchwartzSpace): The Heine-Borel property |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-analysis
|
688/3 |
Mathlib.lean,Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/UniformSpace/Ascoli.lean,Mathlib/Topology/UniformSpace/Pi.lean,Mathlib/Topology/UniformSpace/UniformConvergenceTopology.lean |
6 |
0 |
[] |
nobody |
696-26889 1 year ago |
unknown |
0-0 0 seconds |
| 9444 |
erdOne author:erdOne |
feat: Various instances regarding `𝓞 K`. |
---
<!-- The text above the `---` will become the commit message when your
PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
help-wanted
t-number-theory
|
27/0 |
Mathlib/NumberTheory/NumberField/Basic.lean,Mathlib/RingTheory/IntegralClosure.lean |
2 |
9 |
['erdOne', 'leanprover-bot', 'mattrobball', 'riccardobrasca', 'xroblot'] |
nobody |
696-26808 1 year ago |
918-26235 918 days ago |
1-62292 1 day |
| 8931 |
hmonroe author:hmonroe |
feat(Computable): define P, NP, and NP-complete |
Revised to focus on languages that are binary strings, given the issue of non-acceptable encodings of unspecified Types
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-computability
awaiting-author
|
381/5 |
Mathlib.lean,Mathlib/Computability/Complexity copy.lean,Mathlib/Computability/Complexity.lean,Mathlib/Computability/Encoding.lean,Mathlib/Computability/TMComputable.lean,Mathlib/Computability/TuringMachine.lean,Mathlib/Computability/halting example.lean,docs/references.bib |
8 |
3 |
['fpvandoorn', 'github-actions', 'hmonroe'] |
nobody |
696-26773 1 year ago |
852-36155 852 days ago |
93-64275 93 days |
| 10641 |
newell author:newell |
feat(Topology/MetricSpace/WellSpaced): Define sets that are *well-spaced*. |
Create a new file `Mathlib.Topology.MetricSpace.WellSpaced` that contains definitions of sets which are in some sense *well-spaced*.
Some examples are Delone and Meyer sets, which find applications in Quasicrystals and Coding Theory, among others.
---
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- [ ] depends on: #xyz [optional extra text]
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-topology
|
1073/14 |
Mathlib.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Topology/EMetricSpace/Basic.lean,Mathlib/Topology/GMetric/Basic.lean,Mathlib/Topology/GMetric/GInfSep.lean,Mathlib/Topology/GMetric/WellSpaced.lean,Mathlib/Topology/GPseudoMetric/Basic.lean,Mathlib/Topology/MetricSpace/WellSpaced.lean |
8 |
1 |
['edegeltje'] |
nobody |
696-26741 1 year ago |
unknown |
0-0 0 seconds |
| 10387 |
adomani author:adomani |
feat(Tactic/ComputeDegree): add `polynomial` tactic |
Introducing the `polynomial` tactic, summing up `compute_degree, monicity` and adding support for `leadingCoeff`.
This is more of a proof of concept: if there is interest in this tactic, I can polish it up.
See [this Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/113489-new-members/topic/Compute.20roots.20of.20polynomials/near/420713624).
---
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[](https://gitpod.io/from-referrer/)
|
WIP
RFC
t-meta
|
24/0 |
Mathlib/Tactic/ComputeDegree.lean |
1 |
0 |
[] |
nobody |
696-26595 1 year ago |
740-9625 740 days ago |
143-73801 143 days |
| 9154 |
astrainfinita author:astrainfinita |
feat: `npow` / `nsmul` / `Nat.cast`/ `zpow` / `zsmul` implemented using `Nat.binaryRec` |
---
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- [ ] depends on: https://github.com/leanprover/lean4/pull/3756
[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-algebra
blocked-by-other-PR
label:t-algebra$ |
168/359 |
Mathlib/Algebra/Group/Defs.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/Primrec.lean,Mathlib/Data/Bool/Basic.lean,Mathlib/Data/Int/Bitwise.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Digits.lean,Mathlib/Data/Nat/EvenOddRec.lean,Mathlib/Data/Nat/Fib/Basic.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Nat/Order/Basic.lean,Mathlib/Data/Nat/Parity.lean,Mathlib/Data/Nat/Size.lean,Mathlib/Data/Num/Lemmas.lean,Mathlib/Init/Data/Nat/Bitwise.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/Internal.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/Denumerable.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Logic/Equiv/Nat.lean,lake-manifest.json,lakefile.lean,test/zmod.lean |
25 |
7 |
['astrainfinita', 'eric-wieser', 'kim-em'] |
nobody |
696-26386 1 year ago |
unknown |
0-0 0 seconds |
| 6603 |
tydeu author:tydeu |
feat: automatically try `cache get` before build |
---
A quick proof-of-concept. With this, `lake build` will always try `cache get` before building mathlib.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
CI
|
29/0 |
lakefile.lean |
1 |
3 |
['kim-em', 'tydeu'] |
nobody |
696-26360 1 year ago |
1050-42883 1050 days ago |
11-2031 11 days |
| 6058 |
apurvnakade author:apurvnakade |
feat: duality theory for cone programs |
This PR tracks the development of duality theory for cone programs.
[Reference](https://ti.inf.ethz.ch/ew/courses/ApproxSDP09/notes/conelp.pdf)
---
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[](https://gitpod.io/from-referrer/)
- [x] depends on: #6059
- [ ] define direct sum of cones
- [ ] weak duality
- [ ] regular duality
- [ ] slater condition
- [ ] strong duality |
merge-conflict
WIP
t-analysis
|
159/0 |
Mathlib.lean,Mathlib/Analysis/Convex/Cone/ConeLinearProgram.lean |
2 |
1 |
[] |
nobody |
696-26305 1 year ago |
1085-63213 1085 days ago |
0-9 9 seconds |
| 6449 |
ADedecker author:ADedecker |
feat: functions with finite fibers |
---
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This has been discussed before on [Zulip](https://leanprover.zulipchat.com/#narrow/stream/217875-Is-there-code-for-X.3F/topic/.E2.9C.94.20Cofinite.20maps.3F) and it came up again while working with @kkytola's student. As explained in the docstring, we could absolutely just use `Tendsto f cofinite cofinite` all the time, but (1) we lack some API for it (2) the API is nicer to setup if we have a separate def (e.g for dot notation) and (3) mentioning filters for such a simple concept is really not beginner-friendly.
I'm not sure at all about the name.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-topology
|
203/0 |
Mathlib.lean,Mathlib/Logic/Function/HasFiniteFibers.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Cofinite.lean |
4 |
14 |
['ADedecker', 'YaelDillies', 'alexjbest', 'kkytola'] |
nobody |
696-26299 1 year ago |
1062-24353 1062 days ago |
6-70040 6 days |
| 8100 |
digama0 author:digama0 |
feat: add support for other types in norm_num |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-meta
|
177/12 |
Mathlib/Tactic/NormNum/Basic.lean,Mathlib/Tactic/NormNum/Eq.lean,Mathlib/Tactic/NormNum/Ineq.lean,Mathlib/Tactic/NormNum/Pow.lean,Mathlib/Tactic/NormNum/Result.lean,Mathlib/Tactic/NormNum/Structural.lean,test/norm_num.lean |
7 |
4 |
['dwrensha'] |
nobody |
696-26167 1 year ago |
unknown |
0-0 0 seconds |
| 13163 |
erdOne author:erdOne |
feat(.vscode/module-docstring.code-snippet): Prevent auto-complete from firing on `do` |
---
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[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-meta
|
5/0 |
.vscode/module-docstring.code-snippets |
1 |
5 |
['erdOne', 'grunweg', 'robertylewis', 'trivial1711'] |
nobody |
696-24909 1 year ago |
728-39101 728 days ago |
50-78405 50 days |
| 15585 |
astrainfinita author:astrainfinita |
test make `HasQuotient.quotient'` reducible |
---
<!-- The text above the `---` will become the commit message when your
PR is merged. Please leave a blank newline before the `---`, otherwise
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Please ask for help on https://leanprover.zulipchat.com if needed.
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
label:t-algebra$ |
8/1 |
Mathlib/Algebra/Quotient.lean,Mathlib/GroupTheory/Coset.lean |
2 |
1 |
['github-actions'] |
nobody |
694-58575 1 year ago |
unknown |
0-0 0 seconds |
| 15586 |
astrainfinita author:astrainfinita |
test make `HasQuotient` out put a `setoid` |
---
<!-- The text above the `---` will become the commit message when your
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
label:t-algebra$ |
22/36 |
Mathlib/Algebra/Lie/CartanExists.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Lie/Weights/Basic.lean,Mathlib/Algebra/Quotient.lean,Mathlib/Analysis/Normed/Group/AddCircle.lean,Mathlib/GroupTheory/Commensurable.lean,Mathlib/GroupTheory/Coset.lean,Mathlib/GroupTheory/CosetCover.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/QuotientGroup.lean,Mathlib/LinearAlgebra/Quotient.lean,Mathlib/RingTheory/Ideal/Quotient.lean,Mathlib/Topology/Algebra/UniformRing.lean |
14 |
5 |
['astrainfinita', 'github-actions', 'leanprover-bot'] |
nobody |
694-58575 1 year ago |
unknown |
0-0 0 seconds |
| 13791 |
digama0 author:digama0 |
refactor: Primrec and Partrec |
General cleanup of the `Primrec` and `Partrec` files, to better adjust to lean 4 things. The main user-visible change is that `Primrec₂` is no longer a `def` but an `abbrev`, because it was causing inference issues in lean 4. I also removed all the nonterminal `simp`s in `PartrecCode.lean`.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-computability
tech debt
|
585/778 |
Mathlib/Computability/Ackermann.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/Primrec.lean |
5 |
2 |
['github-actions', 'grunweg'] |
nobody |
692-79844 1 year ago |
756-69430 756 days ago |
1-84718 1 day |
| 12418 |
rosborn author:rosborn |
style: replace preimage_val with ↓∩ notation |
---
This is a rough draft of what the new `↓∩` notation would look like within mathlib. I believe this is an improvement in clarity and would like to have `↓∩` as a standard notation (along with `''`, `⁻¹'`, `↑`, etc...). As `↓∩` is specialized for `Set`s, I have only changed `preimage_val` when the left-hand side of `↓∩` is a `Set`.
The introduction of the `↓∩` notation to Data.Set.Image is temporary as it isn't possible to import Data.Set.Subset directly. If we want `↓∩` unscoped, where would be the best place to define it? An option is Data.Set.Defs, but the notation cannot be defined without additional imports as the file does not import `notation3`.
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merge-conflict |
56/61 |
Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Data/Set/Function.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Set/Subset.lean,Mathlib/MeasureTheory/Constructions/Polish.lean,Mathlib/MeasureTheory/MeasurableSpace/Basic.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/Order/UpperLower/Basic.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/Clopen.lean,Mathlib/Topology/Connected/Basic.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/LocalAtTarget.lean,Mathlib/Topology/LocallyConstant/Basic.lean,Mathlib/Topology/Separation.lean,Mathlib/Topology/Sober.lean |
18 |
3 |
['grunweg', 'rosborn'] |
nobody |
692-79602 1 year ago |
779-3186 779 days ago |
29-50022 29 days |
| 9978 |
astrainfinita author:astrainfinita |
chore(FieldTheory/KummerExtension): move some lemmas earlier |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-algebra
label:t-algebra$ |
197/177 |
Mathlib.lean,Mathlib/Data/Polynomial/FieldDivision.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Polynomial/Irreducible.lean |
5 |
5 |
['alreadydone', 'grunweg', 'riccardobrasca'] |
nobody |
692-79394 1 year ago |
890-73576 890 days ago |
8-83342 8 days |
| 12429 |
adomani author:adomani |
feat: toND -- auto-generating natDegree |
This is an experiment to automatically translate theorems about `degree` to theorems about `natDegree`.
---
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|
t-algebra
RFC
merge-conflict
awaiting-author
t-meta
label:t-algebra$ |
167/132 |
Mathlib.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Degree/Lemmas.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Polynomial/HasseDeriv.lean,Mathlib/Algebra/Polynomial/Inductions.lean,Mathlib/Algebra/Polynomial/Mirror.lean,Mathlib/Algebra/Polynomial/Reverse.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ToNatDegree.lean,scripts/noshake.json |
11 |
2 |
['adomani', 'grunweg'] |
nobody |
692-78705 1 year ago |
804-26378 804 days ago |
3-76602 3 days |
| 15823 |
eric-wieser author:eric-wieser |
Quotients of rings in model theory |
---
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|
merge-conflict
t-logic
|
55/13 |
Mathlib/ModelTheory/Algebra/Ring/FreeCommRing.lean,Mathlib/ModelTheory/Syntax.lean |
2 |
1 |
['github-actions'] |
nobody |
692-57268 1 year ago |
unknown |
0-0 0 seconds |
| 12178 |
joneugster author:joneugster |
feat(Data/Matrix/Basic): add notation for `m×n`-Matrices |
Introduce the notation `Mat[m,n][R]` for `Matrix (Fin m) (Fin n) R`.
[Zulip thread](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Why.20does.20.60Matrix.2Erow.60.20use.20.20.60Unit.60.20instead.20of.20.60Fin.201.60.3F/near/427949223)
---
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|
merge-conflict
t-algebra
label:t-algebra$ |
139/135 |
Mathlib/Algebra/Lie/CartanMatrix.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Data/Matrix/Basic.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matrix/Rank.lean,Mathlib/Data/Matrix/Reflection.lean,Mathlib/GroupTheory/Coxeter/Matrix.lean,Mathlib/LinearAlgebra/Matrix/Adjugate.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Coeff.lean,Mathlib/LinearAlgebra/Matrix/Determinant.lean,Mathlib/LinearAlgebra/Matrix/SpecialLinearGroup.lean,Mathlib/LinearAlgebra/Matrix/Trace.lean,Mathlib/LinearAlgebra/Matrix/Transvection.lean,Mathlib/LinearAlgebra/PID.lean,Mathlib/LinearAlgebra/Vandermonde.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/NumberTheory/ModularForms/CongruenceSubgroups.lean,Mathlib/NumberTheory/ModularForms/SlashActions.lean,Mathlib/NumberTheory/ModularForms/SlashInvariantForms.lean,Mathlib/NumberTheory/RamificationInertia.lean,Mathlib/RingTheory/SimpleModule.lean,test/matrix.lean |
22 |
9 |
['YaelDillies', 'eric-wieser', 'grunweg', 'joneugster'] |
nobody |
692-34392 1 year ago |
811-24785 811 days ago |
5-76679 5 days |
| 12751 |
Command-Master author:Command-Master |
feat: add lemmas for Nat/Bits, Nat/Bitwise and Nat/Size |
Remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`.
---
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|
merge-conflict
t-data
new-contributor
|
66/7 |
Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Nat/Size.lean |
4 |
26 |
['Command-Master', 'Rida-Hamadani', 'Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'jcommelin'] |
nobody |
692-14356 1 year ago |
727-20578 727 days ago |
56-40668 56 days |
| 15448 |
urkud author:urkud |
chore(*): deprecate `Option.elim'` |
Use `Option.elim` instead.
---
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merge-conflict
awaiting-author
tech debt
|
54/50 |
Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/Calculus/LagrangeMultipliers.lean,Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/Computability/TMToPartrec.lean,Mathlib/Data/Option/Defs.lean,Mathlib/LinearAlgebra/Basis.lean,Mathlib/Logic/Embedding/Set.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/MeasureTheory/OuterMeasure/Induced.lean,Mathlib/NumberTheory/Dioph.lean,Mathlib/Topology/Compactness/Paracompact.lean,Mathlib/Topology/LocallyFinite.lean |
17 |
12 |
['Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'grunweg', 'urkud'] |
nobody |
692-3409 1 year ago |
701-49571 701 days ago |
7-18420 7 days |
| 10350 |
Shamrock-Frost author:Shamrock-Frost |
feat(Data/Setoid): add the operations of taking the equivalence class of an element and of saturating a set wrt an equivalence relation |
I'm open to suggestions about changing the name "saturate", someone on zulip rightly pointed out this is a very overloaded term in math. That said, I think it's unlikely to cause confusion and that there's only one reasonable interpretation in the context of setoids.
---
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- [x] depends on: #10347
- [x] depends on: #10348
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-data
|
169/3 |
Mathlib/Data/Setoid/Basic.lean,Mathlib/Data/Setoid/Partition.lean,Mathlib/Order/Closure.lean |
3 |
1 |
[] |
nobody |
690-16630 1 year ago |
809-8258 809 days ago |
19-74546 19 days |
| 13573 |
Shamrock-Frost author:Shamrock-Frost |
feat: add multivariate polynomial modules |
Add a type synonym for multivariate polynomials with coefficients in a module.
---
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Multivariate polynomials with module coefficients are sort of silly, but they sometimes show up in commutative algebra (eg in the definition of a quasi regular sequence). Writing this code involved a lot of copy and pasting from `PolynomialModule` and `MvPolynomial`. The API is definitely lacking at this stage but it's a start.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-algebra
label:t-algebra$ |
691/6 |
Mathlib.lean,Mathlib/Algebra/MvPolynomial/Module/Basic.lean,Mathlib/Algebra/MvPolynomial/Module/MvAEval.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean |
4 |
9 |
['Shamrock-Frost', 'erdOne', 'github-actions'] |
nobody |
690-16610 1 year ago |
726-8978 726 days ago |
39-72752 39 days |
| 6517 |
MohanadAhmed author:MohanadAhmed |
feat: discrete Fourier transform of a finite sequence |
# Discrete Fourier Transform (DFT) Matrix and DFT of a (finite) sequence
This file defines the `dft` opertaion on a sequence (also a vecotr) and the DFT operation matrix
## Main definitions
- `dft v`: given a sequence (v : (Fin n) → ℂ) we can transform it into a sequence (V : (Fin n) →ℂ)
such that
$$V [p] = ∑_{k = 0}^{N - 1} e^{-j*2πkp/n} v [k]$$
- `idft V` : given a sequence (V : (Fin n) → ℂ) we can transform it into a sequence
(v : (Fin n) → ℂ)
such that
$$v [k] = \frac{1}{N}∑_{p = 0}^{n - 1} e^{j*2πkp/N} v [p]$$
- `dftMatrix n` : the dft matrix of dimensions $n \times n$ with the `k, p` entry equal to
$$Wₙ[k, p] = e^{-j2πkp/n}$$
- `(dftMatrix n)⁻¹` : the idft matrix of dimensions $n \times n$ with the `k, p` entry equal to
$$Wₙ[k, p] = (1/N) e^{j2πkp/n}$$
## Main results
- `dft v = (dftMatrix n) v` : the dft operation on a sequence is the same as the dft matrix applied to the vector
- `idft V = (dftMatrix n)⁻¹ V` : the idft operation on a sequence is the same as the idft matrix applied to the vector
- `dft (idft v) = dft ( idft v) = v` the dft and idft operations are inverses
- `Wₙ = vandermonde (w)` : the dft matrix is vandermonde with `w` being the first row of the dft matrix
- `circulant t = (dftMatrix n)⁻¹ ⬝ diagonal (dft t) ⬝ (dftMatrix n)` : a circulant matrix is diagonalizable by the dft and idft matrix pair.
---
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merge-conflict
awaiting-author
t-algebra
label:t-algebra$ |
294/0 |
Mathlib.lean,Mathlib/LinearAlgebra/Matrix/DFT.lean |
2 |
26 |
['MohanadAhmed', 'ericrbg'] |
nobody |
690-16448 1 year ago |
999-40664 999 days ago |
65-20427 65 days |
| 13155 |
alreadydone author:alreadydone |
feat(NumberTheory/EllipticDivisibilitySequence): show elliptic relations follow from even-odd recursion |
This PR is centered around the (generalized) elliptic relations (`rel₄`)
$E(a,b,c,d): W_{a+b}W_{a-b}W_{c+d}W_{c-d}=W_{a+c}W_{a-c}W_{b+d}W_{b-d}-W_{a+d}W_{a-d}W_{b+c}W_{b-c}$.
For an integer-indexed sequence W valued in a commutative ring, the relation makes sense only when a,b,c,d are all integers or all half integers. For convenience of formalization, we instead consider integers a,b,c,d of the same parity and divide all subscripts by 2. We extract the subexpression $W_{(a+b)/2}W_{(a-b)/2}$ (which appear six times) as `addMulSub W a b`.
The collection of all $E(a,b,c,d)$ is equivalent to Stange's axiom for elliptic nets (`net`), and the literature (e.g. Silverman) commonly consider only the three-index special case $E(m,n,r,0)$ (`Rel₃`). Important special cases of these relations are
(i) $E(m+1,m,1,0): W_{2m+1}W_1^3=W_{m+2}W_m^3-W_{m+1}^3 W_{m-1}$ (`oddRec`) and
(ii) $E(m+1,m-1,1,0): W_{2m}W_2 W_1^2=W_m(W_{m+2}W_{m-1}^2-W_{m-2}W_{m+1}^2)$ (`evenRec`),
which suffice to uniquely specify $W$ on all positive integers recursively from four initial values $W_1, W_2, W_3, W_4$ (`IsEllSequence.ext`, if $W_1 W_2$ is not a zero divisor). In the usual setting where $W_1=1$ and $W_2\mid W_4$, there does exist a sequence (`normEDS`) satisfying (i) and (ii) given initial values $W_2, W_3$ and $W_4/W_2$. It turns out the same non-zerodivisor condition also guarantees that W is an odd function with $W_0=0$, which naturally extends W to all integers.
The main result of this PR (`rel₄_of_oddRec_evenRec`, `IsEllSequence.of_oddRec_evenRec`) is a purely algebraic proof that the sequence W defined by the single-parameter elliptic relations (i) and (ii) implies all $E(a,b,c,d)$, based on my original argument first published on [Math.SE](https://math.stackexchange.com/a/4903422/12932). It's based on the observation that a nonzerodivisor-multiple of $E(a,b,c,d)$ can be expressed as a linear combination of various $E(a,b,c_\min,d_\min)$ with the two smallest indices fixed at their minimal possible values, which can be transformed (`transf`) to an elliptic relation with smaller `a` (which can be assumed to hold by induction), unless they are of the form (i) or (ii) which hold by assumption. For this argument it's necessary to assume `a > b > c > d ≥ 0` (see `StrictAnti₄` and `Rel₄OfValid`), but it's easy to extend to arbitrary a,b,c,d by symmetry properties of `rel₄` under negation and permutations of indices.
In the subsequent PR #13057, we show all normalized EDSs (`normEDS`), defined using the even-odd recursion (i)-(ii), are elliptic (i.e. satisfy the elliptic relations) divisibility sequences. This PR doesn't directly apply because a normEDS doesn't always satisfy the nonzerodivisor condition, but they are specializations of the universal normEDS, which does satisfy the condition. The technique of reducing to the universal case will be applied many times, and relies on the naturality (`map`) lemmas.
We also change the `ℕ` in the definition `IsDivSequence` to `ℤ` which is more natural given that W is a `ℤ`-indexed sequence.
---
- [x] depends on: #13153
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merge-conflict
t-algebra
awaiting-author
t-number-theory
label:t-algebra$ |
565/12 |
Mathlib/NumberTheory/EllipticDivisibilitySequence.lean |
1 |
55 |
['Multramate', 'alreadydone', 'github-actions', 'grunweg'] |
nobody |
684-30052 1 year ago |
733-31939 733 days ago |
17-23314 17 days |
| 15600 |
adomani author:adomani |
feat: lint also `let` vs `have` |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-linter
|
77/26 |
Mathlib/Tactic/Linter/HaveLetLinter.lean,test/HaveLetLinter.lean |
2 |
1 |
['github-actions'] |
nobody |
682-84728 1 year ago |
703-78426 703 days ago |
0-8 8 seconds |
| 16253 |
Shreyas4991 author:Shreyas4991 |
feat: Basics of Discrete Fair Division in Mathlib |
This PR adds the basics of discrete fair division in mathlib. We include the definitions of allocations, valuations, properties of valuations, and the following notions : Envy-Freeness (EF), Envy-Freeness upto 1 good (EF1), and envy freeness upto any good (EFX). We also include the various implications between these notions.
---
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[](https://gitpod.io/from-referrer/)
|
WIP
awaiting-author
|
144/0 |
Mathlib/GameTheory/FairDivision/Discrete/Basic.lean |
1 |
9 |
['Shreyas4991', 'eric-wieser', 'github-actions'] |
nobody |
681-82641 1 year ago |
682-502 682 days ago |
0-20853 5 hours |
| 13970 |
adomani author:adomani |
feat: a linter to flag unnecessary uses of `nolint simpNF` |
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-linter
awaiting-author
|
230/0 |
Mathlib.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/Quaternion.lean,Mathlib/CategoryTheory/Comma/Arrow.lean,Mathlib/CategoryTheory/Monoidal/End.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/Rat/Defs.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Even.lean,Mathlib/LinearAlgebra/CliffordAlgebra/EvenEquiv.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/UnnecessarySyntax.lean,test/UnnecessarySyntax.lean |
13 |
4 |
['adomani', 'github-actions', 'grunweg', 'leanprover-bot'] |
nobody |
681-21542 1 year ago |
unknown |
0-0 0 seconds |
| 15162 |
adomani author:adomani |
feat: checkAsSorry linter |
A very preliminary version of the `checkAsSorry` linter.
It flags declarations whose type is not equal to the 'asSorry'ed one.
[Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Running.20Mathlib.20under.20.60set_option.20debug.2EbyAsSorry.60)
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-linter
|
119/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/CheckAsSorry.lean,test/CheckAsSorry.lean |
4 |
1 |
['github-actions'] |
nobody |
681-20530 1 year ago |
unknown |
0-0 0 seconds |
| 15121 |
Eloitor author:Eloitor |
feat: iff theorems for IsSplitEpi and IsSplitMono in opposite category |
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-category-theory
new-contributor
|
40/0 |
Mathlib/CategoryTheory/EpiMono.lean |
1 |
3 |
['github-actions', 'joelriou', 'mattrobball'] |
nobody |
678-75591 1 year ago |
710-34850 710 days ago |
7-3203 7 days |
| 15895 |
madvorak author:madvorak |
feat(Computability/ContextFreeGrammar): mapping between two types of nonterminal symbols |
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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-->
[](https://gitpod.io/from-referrer/)
|
t-computability
WIP
|
172/0 |
Mathlib/Computability/ContextFreeGrammar.lean |
1 |
43 |
['YaelDillies', 'github-actions', 'madvorak'] |
nobody |
678-5984 1 year ago |
682-39493 682 days ago |
1-43047 1 day |
| 14038 |
adomani author:adomani |
test/decl diff in lean dev |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
|
231/2 |
.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,.github/workflows/mk_build_yml.sh,Mathlib/Tactic/Eval.lean,scripts/decls_diff_hybrid.sh,scripts/list_decls.lean |
8 |
3 |
['github-actions'] |
nobody |
677-14044 1 year ago |
749-70563 749 days ago |
0-8 8 seconds |
| 14046 |
adomani author:adomani |
test: diff of declarations in lean |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
|
231/2 |
.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,.github/workflows/mk_build_yml.sh,Mathlib/Tactic/Eval.lean,scripts/decls_diff_hybrid.sh,scripts/list_decls.lean |
8 |
2 |
['github-actions'] |
nobody |
677-14044 1 year ago |
unknown |
0-0 0 seconds |
| 12107 |
yuma-mizuno author:yuma-mizuno |
feat(Mathlib/Tactic/Widget/StringDiagram): support 2-morphisms in bicategories |
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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- [x] depends on: #11080
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-category-theory
t-meta
|
1158/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Coherence.lean,Mathlib/Tactic/Widget/StringDiagram.lean,scripts/noshake.json,test/StringDiagram.lean,widget/src/penrose/monoidal.dsl,widget/src/penrose/monoidal.sty |
8 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
672-8788 1 year ago |
unknown |
0-0 0 seconds |
| 15925 |
yuma-mizuno author:yuma-mizuno |
feat(CategoryTheory/Monoida): proof producing coherence tactic |
---
<!-- The text above the `---` will become the commit message when your
PR is merged. Please leave a blank newline before the `---`, otherwise
GitHub will format the text above it as a title.
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-category-theory
t-meta
|
5018/265 |
Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Adjunction.lean,Mathlib/CategoryTheory/Bicategory/Kan/Adjunction.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/CoherenceLemmas.lean,Mathlib/CategoryTheory/Monoidal/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Rigid/Basic.lean,Mathlib/CategoryTheory/Monoidal/Rigid/Braided.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/BicategoricalComp.lean,Mathlib/Tactic/CategoryTheory/Bicategory/Normalize.lean,Mathlib/Tactic/CategoryTheory/Bicategory/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/Coherence.lean,Mathlib/Tactic/CategoryTheory/Coherence/Basic.lean,Mathlib/Tactic/CategoryTheory/Coherence/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Coherence/Normalize.lean,Mathlib/Tactic/CategoryTheory/Coherence/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/CoherenceNew.lean,Mathlib/Tactic/CategoryTheory/Monoidal.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Basic.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/MonoidalComp.lean,Mathlib/Tactic/Widget/StringDiagram.lean,lake-manifest.json,scripts/noshake.json,test/CategoryTheory/Bicategory.lean,test/CategoryTheory/Coherence.lean,test/CategoryTheory/CoherenceNew.lean,test/CategoryTheory/Monoidal.lean,test/CategoryTheory/Monoidal/Basic.lean,test/CategoryTheory/Monoidal/Normalize.lean,test/CategoryTheory/MonoidalComp.lean,test/StringDiagram.lean |
35 |
1 |
['github-actions'] |
nobody |
671-55325 1 year ago |
unknown |
0-0 0 seconds |
| 7861 |
shuxuezhuyi author:shuxuezhuyi |
feat(Geometry/Hyperbolic/UpperHalfPlane): instance IsometricSMul PSL(2, ℝ) ℍ |
---
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- [ ] depends on: #7835
- [ ] depends on: #7791
[](https://gitpod.io/from-referrer/)
|
merge-conflict
blocked-by-other-PR
t-euclidean-geometry
|
98/0 |
Mathlib.lean,Mathlib/Geometry/Hyperbolic/UpperHalfPlane/Basic.lean,Mathlib/LinearAlgebra/Matrix/ProjectiveSpecialLinearGroup.lean |
3 |
1 |
[] |
nobody |
671-36385 1 year ago |
731-76913 731 days ago |
43-50453 43 days |
| 6475 |
joneugster author:joneugster |
refactor(LinearAlgebra/Span): replace ∙ with • as notation for `span R {x}` |
Change the notation for `Submodule.span R {x}` from `R ∙ x` to the bullet `R • x`, which is also used for scalar multiplication.
---
(this was an experiment originating from a [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/.2E.C2.B7.E2.AC.9D.20.5Brant.5D), I don't have a clear opinion if this is actually a desired thing to do...)
Generally this works and Lean seems to do fine figuring out the difference between `r • x` and `R • x` (The former is scalar multiplication in an `R`-module `M`, the latter is the `Submodule R M` generated by `x`).
Encountered a few regressions that should be considered (the first two might be also bugs that could be looked at independently):
1. `(· • ·)`, and general simple function syntax, does not work as notation for `HSMul.hSMul` anymore. For this reason, I introduced the notation `scoped` to minimise the effect of this. Now it's only a problem if you `open Span`. Note that `fun x₁ x₂ ↦ x₁ • x₂` works flawlessly all the time.
4. `change` and `convert` have troubles to deal with the two competing notations. `have := _; convert this` works.
5. `R • x - y` is not valid anymore and needs parentheses: `R • (x - y)`. I do think this actually helps readability, so I don't mind.
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
RFC
label:t-algebra$ |
323/240 |
Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Lie/Engel.lean,Mathlib/Algebra/Lie/Normalizer.lean,Mathlib/Algebra/Module/PID.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Analysis/InnerProductSpace/TwoDim.lean,Mathlib/Analysis/NormedSpace/ContinuousLinearMap.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Extension.lean,Mathlib/Analysis/NormedSpace/OperatorNorm.lean,Mathlib/Data/ZMod/Quotient.lean,Mathlib/Geometry/Euclidean/Angle/Oriented/Basic.lean,Mathlib/Geometry/Euclidean/Inversion/Calculus.lean,Mathlib/Geometry/Euclidean/MongePoint.lean,Mathlib/Geometry/Euclidean/PerpBisector.lean,Mathlib/Geometry/Euclidean/Sphere/SecondInter.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace.lean,Mathlib/LinearAlgebra/AffineSpace/FiniteDimensional.lean,Mathlib/LinearAlgebra/BilinearForm.lean,Mathlib/LinearAlgebra/DFinsupp.lean,Mathlib/LinearAlgebra/Dimension.lean,Mathlib/LinearAlgebra/FiniteDimensional.lean,Mathlib/LinearAlgebra/LinearIndependent.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/ProjectiveSpace/Basic.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/Quotient.lean,Mathlib/LinearAlgebra/SesquilinearForm.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/MeasureTheory/Integral/Periodic.lean,Mathlib/RingTheory/Coprime/Ideal.lean,Mathlib/RingTheory/Finiteness.lean,Mathlib/RingTheory/Ideal/AssociatedPrime.lean,Mathlib/RingTheory/Ideal/IdempotentFG.lean,Mathlib/RingTheory/Noetherian.lean,Mathlib/Topology/Instances/AddCircle.lean |
42 |
3 |
['eric-wieser', 'joneugster', 'leanprover-bot'] |
nobody |
670-33681 1 year ago |
1064-29019 1064 days ago |
2-35869 2 days |
| 10591 |
adri326 author:adri326 |
feat(Topology/Algebra/ConstMulAction): properties of continuous actions in Hausdorff spaces |
Defines some useful properties of `ContinuousConstSMul` group actions on Hausdorff spaces:
- `MulAction.isClosed_fixedBy`, which proves that the `fixedBy α m` set is closed
- `t2_separation_smul`, which constructs an open set `s` such that `s` and `g • s` are disjoint
- `Set.InjOn.t2_separation_smul`, the extension of `t2_separation_smul` to a set of group elements whose action is injective
---
This PR belongs my series of PR around the formalization of Rubin's theorem. `MulAction.isClosed_fixedBy` is used in several places along the proof, and the separation lemmas are primarily used in showing that `(fixedBy α g)ᶜ` and `(fixedBy α h)ᶜ` are disjoint under some intricate but fully group-theoretic condition.
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[](https://gitpod.io/from-referrer/)
|
t-topology
awaiting-author
t-algebra
label:t-algebra$ |
57/0 |
Mathlib/Topology/Algebra/ConstMulAction.lean |
1 |
9 |
['ADedecker', 'adri326', 'j-loreaux', 'jcommelin'] |
ADedecker assignee:ADedecker |
670-4842 1 year ago |
822-17584 822 days ago |
55-82204 55 days |
| 7545 |
shuxuezhuyi author:shuxuezhuyi |
feat: APIs of `Function.extend f g e'` when `f` is injective |
We characterizes `range g`, `Injective g`, `Surjective g` and `Bijective g` in terms of `extend f g e'`.
---
<!-- The text above the `---` will become the commit message when your
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-logic
|
50/0 |
Mathlib.lean,Mathlib/Logic/Function/ApiForExtend.lean |
2 |
1 |
['fpvandoorn'] |
nobody |
669-49217 1 year ago |
977-83399 977 days ago |
32-32325 32 days |
| 16658 |
adomani author:adomani |
add tips file |
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
awaiting-author
test-ci
|
51/508 |
.github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,scripts/Tips.lean |
5 |
1 |
['github-actions'] |
nobody |
665-78150 1 year ago |
unknown |
0-0 0 seconds |
| 14078 |
Ruben-VandeVelde author:Ruben-VandeVelde |
feat(CI): continue after mk_all fails |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
CI
|
43/0 |
.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,Mathlib/Data/Nat/Test.lean |
5 |
2 |
['bryangingechen', 'github-actions'] |
nobody |
665-58450 1 year ago |
748-25010 748 days ago |
0-13311 3 hours |
| 11283 |
hmonroe author:hmonroe |
feat(ModelTheory/Satisfiability): define theory with independent sentence |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-logic
|
8/0 |
Mathlib/ModelTheory/Satisfiability.lean |
1 |
2 |
['fpvandoorn', 'hmonroe'] |
nobody |
663-29004 1 year ago |
850-2674 850 days ago |
3-63452 3 days |
| 16914 |
siddhartha-gadgil author:siddhartha-gadgil |
Loogle syntax with non-reserved |
This is PR mainly to test that loogle syntax does not break stuff downstream
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
|
4/4 |
lake-manifest.json,lakefile.lean |
2 |
1 |
['github-actions'] |
nobody |
661-17613 1 year ago |
662-14702 662 days ago |
0-14835 4 hours |
| 8118 |
iwilare author:iwilare |
feat(CategoryTheory): add dinatural transformations |
A starting point to define [dinatural transformations](https://ncatlab.org/nlab/show/dinatural+transformation).
This is my first PR so style comments and improvements are very welcome!
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-category-theory
|
147/7 |
Mathlib.lean,Mathlib/CategoryTheory/DinatTrans.lean,Mathlib/CategoryTheory/Functor/Category.lean,Mathlib/CategoryTheory/Products/Bifunctor.lean |
4 |
49 |
['Shamrock-Frost', 'github-actions', 'iwilare', 'joelriou'] |
Shamrock-Frost assignee:Shamrock-Frost |
656-39899 1 year ago |
760-20376 760 days ago |
21-30729 21 days |
| 14242 |
js2357 author:js2357 |
feat: Prove equivalence of `isDedekindDomain` and `isDedekindDomainDvr` |
Prove that `isDedekindDomainDvr` is equivalent to both `isDedekindDomain` and `isDedekindDomainInv`.
Specifically, prove `isDedekindDomainDvr A → isDedekindDomainInv A`, because `isDedekindDomain A → isDedekindDomainDvr A` and `IsDedekindDomain A ↔ IsDedekindDomainInv A` are already in Mathlib.
- [x] depends on: #14099
- [x] depends on: #14216
- [ ] depends on: #14237
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
blocked-by-other-PR
new-contributor
label:t-algebra$ |
269/1 |
Mathlib.lean,Mathlib/RingTheory/DedekindDomain/Dvr.lean,Mathlib/RingTheory/FractionalIdeal/LocalizedAtPrime.lean,Mathlib/RingTheory/Localization/Basic.lean |
4 |
2 |
['github-actions'] |
nobody |
656-250 1 year ago |
743-75597 743 days ago |
0-273 4 minutes |
| 17171 |
astrainfinita author:astrainfinita |
test extends carrier and property |
---
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We need https://github.com/leanprover/lean4/issues/2666 ...
[](https://gitpod.io/from-referrer/)
|
merge-conflict |
433/309 |
Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Directed.lean,Mathlib/Algebra/DirectSum/Decomposition.lean,Mathlib/Algebra/Field/Subfield.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/MulOpposite.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Group/Submonoid/MulOpposite.lean,Mathlib/Algebra/Group/Submonoid/Pointwise.lean,Mathlib/Algebra/Group/Submonoid/Units.lean,Mathlib/Algebra/Group/Subsemigroup/Basic.lean,Mathlib/Algebra/Group/Subsemigroup/Operations.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/Module/Submodule/Lattice.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/MulOpposite.lean,Mathlib/Algebra/Ring/Subsemiring/Order.lean,Mathlib/Algebra/Star/Subalgebra.lean,Mathlib/Algebra/Star/Subsemiring.lean,Mathlib/Data/Complex/Module.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/Deprecated/Subfield.lean,Mathlib/Deprecated/Subgroup.lean,Mathlib/Deprecated/Submonoid.lean,Mathlib/Deprecated/Subring.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/GroupTheory/DoubleCoset.lean,Mathlib/GroupTheory/Finiteness.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/NonUnitalSubring/Basic.lean,Mathlib/RingTheory/NonUnitalSubsemiring/Basic.lean,Mathlib/SetTheory/Cardinal/Subfield.lean,Mathlib/Topology/Algebra/Algebra.lean,Mathlib/Topology/Algebra/OpenSubgroup.lean |
42 |
1 |
['github-actions'] |
nobody |
651-84992 1 year ago |
unknown |
0-0 0 seconds |
| 7516 |
ADedecker author:ADedecker |
perf: use `abbrev` to prevent unifying useless data |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
|
4/3 |
Mathlib/Topology/ContinuousFunction/Bounded.lean |
1 |
3 |
['ADedecker', 'leanprover-bot', 'mattrobball'] |
nobody |
650-56652 1 year ago |
1011-20869 1011 days ago |
0-16 16 seconds |
| 17127 |
astrainfinita author:astrainfinita |
chore: remove global `Quotient.mk` `⟦·⟧` notation |
---
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Merge this PR when we are ready to migrate to `QuotLike` API (#16421).
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-data
|
137/2 |
Counterexamples/Pseudoelement.lean,Mathlib/Algebra/Associated/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Order/CauSeq/Completion.lean,Mathlib/Algebra/Quandle.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Product.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean,Mathlib/CategoryTheory/Abelian/Pseudoelements.lean,Mathlib/CategoryTheory/Limits/Shapes/SingleObj.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Free/Coherence.lean,Mathlib/CategoryTheory/Skeletal.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Fintype/List.lean,Mathlib/Data/Fintype/Quotient.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/QPF/Multivariate/Constructions/Fix.lean,Mathlib/Data/QPF/Univariate/Basic.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Data/Set/Finite.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/LinearAlgebra/Dual.lean,Mathlib/LinearAlgebra/Ray.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/ModelTheory/DirectLimit.lean,Mathlib/ModelTheory/Fraisse.lean,Mathlib/ModelTheory/Quotients.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/FundamentalCone.lean,Mathlib/NumberTheory/NumberField/Embeddings.lean,Mathlib/NumberTheory/NumberField/Units/DirichletTheorem.lean,Mathlib/NumberTheory/Padics/PadicIntegers.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/RepresentationTheory/Action/Concrete.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Ordinal.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/Birthday.lean,Mathlib/SetTheory/Game/Impartial.lean,Mathlib/SetTheory/Game/Ordinal.lean,Mathlib/SetTheory/Game/State.lean,Mathlib/SetTheory/Lists.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Surreal/Basic.lean,Mathlib/SetTheory/Surreal/Dyadic.lean,Mathlib/SetTheory/Surreal/Multiplication.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Rank.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/Homotopy/HomotopyGroup.lean,Mathlib/Topology/Homotopy/Path.lean,Mathlib/Topology/Homotopy/Product.lean,Mathlib/Topology/MetricSpace/GromovHausdorff.lean,Mathlib/Topology/UniformSpace/Separation.lean,test/interactiveUnfold.lean |
68 |
1 |
['github-actions'] |
nobody |
650-51695 1 year ago |
650-51695 650 days ago |
4-72805 4 days |
| 16887 |
metinersin author:metinersin |
feat(ModelTheory/Complexity): define conjunctive and disjunctive formulas |
Defines `FirstOrder.Language.BoundedFormula.IsConjunctive` and `FirstOrder.Language.BoundedFormula.IsDisjunctive`.
---
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- [ ] depends on: #16885
[](https://gitpod.io/from-referrer/)
|
merge-conflict
blocked-by-other-PR
new-contributor
t-logic
|
300/7 |
Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean |
3 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
647-82628 1 year ago |
663-24302 663 days ago |
0-1299 21 minutes |
| 16888 |
metinersin author:metinersin |
feat(ModelTheory/Complexity): Define conjunctive and disjunctive normal forms |
Define `FirstOrder.Language.BoundedFormula.IsDNF` and `FirstOrder.Language.BoundedFormula.IsCNF`.
---
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- [ ] depends on: #16887
[](https://gitpod.io/from-referrer/)
|
merge-conflict
blocked-by-other-PR
new-contributor
t-logic
|
415/7 |
Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean |
3 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
647-82628 1 year ago |
663-24303 663 days ago |
0-1045 17 minutes |
| 16889 |
metinersin author:metinersin |
feat(ModelTheory/Complexity): Normal forms |
Defines `FirstOrder.Language.BoundedFormula.toDNF` and `FirstOrder.Language.BoundedFormula.toCNF` - given a quantifier-free formula, these construct a semantically equivalent formula in disjunctive normal form and conjunctive normal form, respectively.
---
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- [ ] depends on: #16888
[](https://gitpod.io/from-referrer/)
|
merge-conflict
blocked-by-other-PR
new-contributor
t-logic
|
525/7 |
Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean |
3 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
647-82627 1 year ago |
663-20053 663 days ago |
0-613 10 minutes |
| 5995 |
astrainfinita author:astrainfinita |
feat: add APIs about `Quotient.choice` |
Some docs in this PR refer to the definition in #5576.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
RFC
t-data
|
76/6 |
Mathlib/Data/Quot.lean |
1 |
3 |
['YaelDillies', 'astrainfinita', 'gebner'] |
eric-wieser assignee:eric-wieser |
641-10437 1 year ago |
766-31098 766 days ago |
285-35716 285 days |
| 14619 |
Command-Master author:Command-Master |
chore: Merge `Trunc` to `Squash` |
Remove `Trunc` and use `Squash` instead
---
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|
merge-conflict
WIP
new-contributor
|
197/211 |
Mathlib/CategoryTheory/EpiMono.lean,Mathlib/CategoryTheory/Preadditive/Biproducts.lean,Mathlib/Data/DFinsupp/Basic.lean,Mathlib/Data/Fintype/Basic.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Data/Fintype/Option.lean,Mathlib/Data/Fintype/Perm.lean,Mathlib/Data/Fintype/Quotient.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Semiquot.lean,Mathlib/GroupTheory/Perm/Cycle/Factors.lean,Mathlib/GroupTheory/Perm/Sign.lean,Mathlib/Logic/Equiv/List.lean |
13 |
3 |
['Command-Master', 'github-actions', 'vihdzp'] |
nobody |
638-42778 1 year ago |
unknown |
0-0 0 seconds |
| 13156 |
erdOne author:erdOne |
refactor(Algebra/Module/LocalizedModule): Redefine `LocalizedModule` in terms of `OreLocalization`. |
---
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- [x] depends on: #13151
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
label:t-algebra$ |
519/628 |
Mathlib.lean,Mathlib/Algebra/Module/LocalizedModule.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/Localization/BaseChange.lean,Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/OreLocalization/Module.lean,Mathlib/RingTheory/OreLocalization/Ring.lean |
8 |
4 |
['github-actions', 'leanprover-bot', 'mattrobball'] |
nobody |
636-17577 1 year ago |
636-17577 636 days ago |
51-84473 51 days |
| 16348 |
urkud author:urkud |
refactor(Topology): require `LinearOrder` with `OrderTopology` |
While the definition formally makes sense for a preorder,
this topology is usually not the right one for a non-linear order (e.g., `Real × Real`).
See [Zulip thread](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Open.20Ioi)
---
This PR doesn't cleanup any API, I'm going to do it in a later PR.
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-topology
t-order
|
33/46 |
Mathlib/Analysis/Asymptotics/SuperpolynomialDecay.lean,Mathlib/Topology/Algebra/Order/LiminfLimsup.lean,Mathlib/Topology/Instances/Sign.lean,Mathlib/Topology/Order/Basic.lean,Mathlib/Topology/Order/Filter.lean,Mathlib/Topology/Order/MonotoneContinuity.lean |
6 |
10 |
['YaelDillies', 'github-actions', 'jcommelin', 'urkud'] |
nobody |
636-17201 1 year ago |
676-49535 676 days ago |
3-83049 3 days |
| 13965 |
pechersky author:pechersky |
feat(Data/DigitExpansion): reals via digit expansion are complete |
---
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[](https://gitpod.io/from-referrer/)
- [ ] depends on: #13964 |
merge-conflict
blocked-by-other-PR
t-data
|
3876/0 |
Mathlib.lean,Mathlib/Data/DigitExpansion/Add.lean,Mathlib/Data/DigitExpansion/Defs.lean,Mathlib/Data/DigitExpansion/Hensel.lean,Mathlib/Data/DigitExpansion/Integer/Basic.lean,Mathlib/Data/DigitExpansion/Integer/Mul.lean,Mathlib/Data/DigitExpansion/Real/Basic.lean,Mathlib/Data/DigitExpansion/Real/CompleteSpace.lean,Mathlib/Data/DigitExpansion/Real/ConditionallyComplete.lean,docs/references.bib |
10 |
4 |
['github-actions'] |
nobody |
634-54369 1 year ago |
753-588 753 days ago |
0-600 10 minutes |
| 16984 |
hrmacbeth author:hrmacbeth |
feat: extend `module` tactic to handle multiple rings, not strictly ordered by inclusion |
The `module` tactic currently in Mathlib handles scalars from multiple rings, but only if for any two rings `R` and `S` which appear, either `R` is an algebra over `S` or vice versa. This PR extends the tactic by providing a syntax `module T`, which will handle scalars from any ring `R` which `T` is an algebra over.
For example,
```lean
example : (2:ℤ) • x = (2:ℚ≥0) • x := by module
```
fails since `ℤ` is not a `ℚ≥0`-algebra and `ℚ≥0` is not a `ℤ`-algebra, but
```lean
example : (2:ℤ) • x = (2:ℚ≥0) • x := by module ℚ
```
works since `ℚ` is both a `ℤ`-algebra and a `ℚ≥0`-algebra.
This PR is a quick proof-of-concept implementation, just to record the desired approach and tactic syntax. It should not be merged as-is. It has with a lot of code duplication and should be rewritten more efficiently (for example, `parse` and `parseEnsuringType` should be merged to a single function, and the `some`/`none` cases in `matchScalarsAux` should be merged to a uniform treatment) before being considered for merging to Mathlib.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-meta
|
158/35 |
Mathlib/Tactic/Module.lean,test/module.lean |
2 |
1 |
['github-actions'] |
nobody |
632-39641 1 year ago |
unknown |
0-0 0 seconds |
| 12750 |
Command-Master author:Command-Master |
feat: define Gray code |
---
Define binary reflected gray code, both as a permutation of `Nat` and as a permutation of `BitVec n`, and prove some theorems about them. Additionally, remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`.
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- [ ] depends on: #12751
[](https://gitpod.io/from-referrer/)
|
blocked-by-other-PR
t-data
new-contributor
merge-conflict
awaiting-author
|
226/0 |
Mathlib.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/GrayCode.lean,Mathlib/Data/Nat/Size.lean |
5 |
5 |
['Rida-Hamadani', 'alreadydone', 'github-actions', 'grunweg'] |
nobody |
630-18885 1 year ago |
779-983 779 days ago |
16-49744 16 days |
| 12414 |
adomani author:adomani |
test: lint and unlint `·` |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict |
64/14 |
Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib/Algebra/Module/Submodule/Bilinear.lean,Mathlib/Tactic/Linter/Multigoal.lean,test/Multigoal.lean |
4 |
4 |
['adomani', 'github-actions', 'grunweg', 'leanprover-bot'] |
nobody |
628-15426 1 year ago |
unknown |
0-0 0 seconds |
| 16647 |
eric-wieser author:eric-wieser |
feat: partitions of lists |
The length of this list is the bell numbers.
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-combinatorics
t-data
|
311/0 |
Mathlib.lean,Mathlib/Data/List/Partition.lean |
2 |
1 |
['github-actions'] |
nobody |
625-35900 1 year ago |
unknown |
0-0 0 seconds |
| 13514 |
madvorak author:madvorak |
feat(Computability/ContextFreeGrammar): closure under union |
- [ ] depends on: #15895
---
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|
merge-conflict
t-computability
blocked-by-other-PR
|
448/4 |
Mathlib/Computability/ContextFreeGrammar.lean |
1 |
50 |
['Rida-Hamadani', 'YaelDillies', 'github-actions', 'madvorak'] |
nobody |
617-30213 1 year ago |
695-4194 695 days ago |
72-28417 72 days |
| 5364 |
thorimur author:thorimur |
feat: `wlog ... replacing` |
This allows hypotheses to be removed from the set of generalized hypotheses. E.g. `wlog h : P replacing h'` will remove `h'` from the hypotheses of the type of `this` and from the context of the goal that will suppose `h`. See [zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/wlog.20.2E.2E.2E.20replacing.20.2E.2E.2E.3F).
---
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|
merge-conflict
t-meta
|
125/18 |
Mathlib/Tactic/WLOG.lean,test/wlog.lean |
2 |
2 |
['thorimur', 'urkud'] |
nobody |
615-63252 1 year ago |
unknown |
0-0 0 seconds |
| 9654 |
urkud author:urkud |
feat: add `@[mk_eq]` version of `@[mk_iff]` |
The new attribute generates theorems like
```lean
List.chain_eq : @List.Chain = fun {α} R a a_1 => a_1 = [] ∨ ∃ b l, R a b ∧ List.Chain R b l ∧ a_1 = b :: l
```
and is useful to rewrite in a theorem that argues about the properties of an unapplied inductive predicate.
---
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|
merge-conflict
awaiting-author
t-meta
|
63/9 |
Mathlib/Lean/Meta.lean,Mathlib/Tactic/MkIffOfInductiveProp.lean,test/MkIffOfInductive.lean |
3 |
6 |
['Vierkantor', 'github-actions', 'urkud'] |
nobody |
615-63006 1 year ago |
887-26305 887 days ago |
25-70825 25 days |
| 16704 |
AntoineChambert-Loir author:AntoineChambert-Loir |
feat(Mathlib.Data.Ordering.Dickson): Dickson orders |
Dickson orders are a particular class of well founded orders
characterized by the fact that every nonempty set has finitely many minimal elements.
They appear in the classical theory of Groebner bases because it is easier to prove
that some sets are well founded using this property.
WiP. In the `tfae` function, property 2 is exactly `Set.PartiallyWellOrderedOn`, so the PR should be rewritten so as to use that property (and not define `IsDickson`).
---
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|
merge-conflict
WIP
t-order
|
324/0 |
Mathlib.lean,Mathlib/Data/Ordering/Dickson.lean,scripts/noshake.json |
3 |
9 |
['AntoineChambert-Loir', 'b-mehta', 'github-actions'] |
nobody |
615-41563 1 year ago |
666-30394 666 days ago |
2-84515 2 days |
| 16355 |
Ruben-VandeVelde author:Ruben-VandeVelde |
feat: odd_{add,sub}_one |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
awaiting-author
t-number-theory
label:t-algebra$ |
12/0 |
Mathlib/Algebra/Ring/Int.lean,Mathlib/Algebra/Ring/Parity.lean |
2 |
4 |
['Ruben-VandeVelde', 'github-actions', 'urkud'] |
nobody |
614-75760 1 year ago |
679-64206 679 days ago |
0-57608 16 hours |
| 8638 |
alreadydone author:alreadydone |
refactor: noncommutative tensor product |
Co-authored-by: Eric Wieser <wieser.eric@gmail.com>
Co-authored-by: Jujian Zhang <jujian.zhang1998@outlook.com>
This draft PR currently only generalizes a single file TensorProduct.lean; it allows TensorProduct to be taken over a non-commutative ring. Most of the declarations in TensorProduct.lean are now generalized to the non-commutative setting, and very few are deleted (their commutative version will be restored in another file).
Next plans:
+ Change the namespace in TensorProduct.lean from TensorProduct to NonCommTensorProduct, and remove the #aligns
+ I plan to use the same notation for the non-commutative and the commutative TensorProduct, and the user will need to `open scoped` different namespaces to use the one of their choice.
+ Start a new file TensorProduct/Comm.lean, copy the content of TensorProduct.lean on master into it, change the definition TensorProduct to be semi-reducibly defeq to NonCommTensorProduct (in order to support more instances or unify non-defeq instances that become prop-eq in the commutative setting, e.g. we've chosen the R-action on a tensor product over commutative R to come from the left factor, since the action from the right factor is the same), and reuse the NonComm constructions as much as possible. We then change all files that imports TensorProduct.lean to import TensorProduct/Comm.lean instead. Once we do that, mathlib would compile and this PR would be complete. We can gradually generalize other files about tensor products this way.
In this PR:
`TensorProduct.map` is now defined in terms of `lTensor` and `rTensor` rather than the other way around, which requires moving `lTensor` and `rTensor` up from their original location. The definition of `rid` also becomes more challenging and is moved down.
An evident observation is that actions on the domain of AddMonoidHom / LinearMap is really natural in the context of tensor products and Hom-tensor adjunction (`TensorProduct.lift`), not the default actions on the codomain. For example, it allows us to write the "balanced biadditive monoid homs" in #8536 as simply `N →ₗ[R] M →+ P` (where the right R-action on M turns into the left action on `M →+ P`).
For this reason, we disable the default instances `AddMonoidHom/LinearMap.module` at the beginning of the file and enable the `AddMonoidHom/LinearMap.domModule` instances instead. (The action on the codomain would be necessary for the non-commutative version of [TensorProduct.lTensorHomToHomLTensor](https://leanprover-community.github.io/mathlib4_docs/Mathlib/LinearAlgebra/TensorProduct.html#TensorProduct.lTensorHomToHomLTensor) (in the form of `P ⊗[R] (M →+ Q) →+ M →+ P ⊗[R] Q`), but I've deleted it for now.)
We register actions on the left factor of a tensor product as the default instance, but we also talk about actions on the right factor (`attribute [local instance] rightModule`).
The Tensor-Hom adjunction #8495 is now `uncurryEquiv` in this PR.
#8519 is now included in this PR and #8584 is now called `lift` in this PR.
`CharacterModule.homEquiv` in #8559 can be obtained by combining `liftEquiv` and `flipMop` in this PR (except for a mop). To refactor the commutative tensor product, we'd need to transfer many R^mop-action to R-action and R^mop-LinearMaps to R-LinearMaps, which can be achieved via `Module.compHom` and `LinearMap.restrictScalars` (requires `LinearMap.CompatibleSMul` instance) given `RingEquiv.toOpposite`. `LinearMap.characterfy` and `CharacterModule.cong` could be obtained from `LinearMap.compAddMonoidHom` in this PR.
TODO:
+ Move delarations that belong to other files.
+ Change docstrings that are no longer accurate.
+ Fix some argument order to be more natural.
---
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merge-conflict
WIP
t-algebra
label:t-algebra$ |
793/676 |
Mathlib/Algebra/Module/LinearMap.lean,Mathlib/GroupTheory/GroupAction/DomAct/Basic.lean,Mathlib/LinearAlgebra/TensorProduct.lean |
3 |
6 |
['alreadydone', 'eric-wieser', 'grhkm21', 'jjaassoonn'] |
nobody |
614-15573 1 year ago |
unknown |
0-0 0 seconds |
| 14598 |
Command-Master author:Command-Master |
chore: add typeclasses to unify various `add_top`, `add_eq_top`, etc. |
Add the four typeclasses `IsTopAbsorbing`, `IsBotAbsorbing`, `NoTopSum`, `NoBotSum`, as additive equivalents for `MulZeroClass` and `NoZeroDivisors`. Add instances of these for `ENNReal`, `WithTop α`, `WithBot α`, `PUnit`, `EReal`, `PartENat`, `Measure`, `Interval` and `Filter`.
Also split `Algebra/Order/AddGroupWithTop` to `Algebra/Order/Group/WithTop` and `Algebra/Order/Monoid/WithTop`
---
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Previous usages of lemmas with quantified names like `WithTop.add_top` have to be changed to just `add_top`.
`add_lt_top` is `@[simp]`, in accordance with `ENNReal.add_lt_top` being `@[simp]`. This affects `WithTop.add_lt_top` which previously hadn't been `@[simp]`.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
t-order
new-contributor
label:t-algebra$ |
264/195 |
Archive/Wiedijk100Theorems/BallotProblem.lean,Mathlib.lean,Mathlib/Algebra/Order/Group/WithTop.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/PUnitInstances/Order.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Analytic/Meromorphic.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/NormedSpace/ENorm.lean,Mathlib/Analysis/SpecialFunctions/JapaneseBracket.lean,Mathlib/Analysis/SpecialFunctions/Log/ENNRealLog.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Nat/WithBot.lean,Mathlib/Data/Real/EReal.lean,Mathlib/LinearAlgebra/Lagrange.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Decomposition/Lebesgue.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL1.lean,Mathlib/MeasureTheory/Function/Jacobian.lean,Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Function/LpSpace.lean,Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Integral/Bochner.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean,Mathlib/MeasureTheory/Integral/VitaliCaratheodory.lean,Mathlib/MeasureTheory/Measure/Hausdorff.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Measure/LevyProkhorovMetric.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/Measure/Regular.lean,Mathlib/MeasureTheory/Measure/Typeclasses.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/Probability/Martingale/Convergence.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/RingTheory/MvPowerSeries/NoZeroDivisors.lean,Mathlib/RingTheory/UniqueFactorizationDomain.lean,Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/HausdorffDistance.lean,Mathlib/Topology/MetricSpace/Lipschitz.lean |
57 |
30 |
['Command-Master', 'YaelDillies', 'github-actions'] |
nobody |
613-47161 1 year ago |
613-47161 613 days ago |
7-45599 7 days |
| 18636 |
adomani author:adomani |
Test/latest import report dev |
This PR is a test accompanying #18631.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
CI
|
147/0 |
.github/workflows/latest_import.yml,lakefile.lean |
2 |
1 |
['github-actions'] |
nobody |
612-34432 1 year ago |
unknown |
0-0 0 seconds |
| 16885 |
metinersin author:metinersin |
feat(ModelTheory/Complexity): define literals |
Defines `FirstOrder.Language.BoundedFormula.IsLiteral` and `FirstOrder.Language.BoundedFormula.simpleNot` - an auxiliary operation that takes the negation of a formula and does some simplification.
---
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- [x] depends on: #16800
[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
new-contributor
t-logic
|
148/5 |
Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Syntax.lean |
4 |
20 |
['YaelDillies', 'awainverse', 'github-actions', 'mathlib4-dependent-issues-bot', 'metinersin'] |
nobody |
611-3282 1 year ago |
646-78994 646 days ago |
0-19926 5 hours |
| 18716 |
jjaassoonn author:jjaassoonn |
feat(Algebra/Module/GradedModule): quotient and subgrading |
<!-- The text above the `---` will become the commit message when your
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- [ ] depends on: #9820
[](https://gitpod.io/from-referrer/)
|
WIP
t-algebra
blocked-by-other-PR
awaiting-CI
merge-conflict
label:t-algebra$ |
997/191 |
Counterexamples/HomogeneousPrimeNotPrime.lean,Mathlib.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Module/GradedModule/Basic.lean,Mathlib/Algebra/Module/GradedModule/QuotientGrading.lean,Mathlib/Algebra/Module/GradedModule/Subgrading.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Ideal.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Submodule.lean,Mathlib/RingTheory/GradedAlgebra/Quotient.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean,scripts/no_lints_prime_decls.txt |
12 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
611-2913 1 year ago |
unknown |
0-0 0 seconds |
| 9341 |
winstonyin author:winstonyin |
feat: Naturality of integral curves |
Let `v` and `v'` be sections of the tangent bundle of manifolds `M` and `M'`, respectively, and let `f : M → M'` be a differentiable map. Then `f` maps integral curves of `v` to integral curves of `v'` if and only if `v` and `v'` are `f`-related.
- [x] depends on: #8483
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-differential-geometry
|
45/0 |
Mathlib/Geometry/Manifold/IntegralCurve.lean,Mathlib/Topology/Algebra/Module/Basic.lean |
2 |
9 |
['github-actions', 'grunweg', 'leanprover-community-mathlib4-bot', 'winstonyin'] |
nobody |
607-55105 1 year ago |
915-25175 915 days ago |
0-28222 7 hours |
| 13248 |
hcWang942 author:hcWang942 |
feat: basic concepts of auction theory |
## Description
Formalise some core concepts and results in auction theory: this includes definitions for first-price and second-price auctions, as well as several fundamental results and helping lemmas.
This is the very first PR of the project formalizing core concepts and results in auction theory.
Our group is working on more contributions on the formalization of game theory prefix.
Co-authored-by: Ma Jiajun <hoxide@gmail.com>
## Reference
Roughgarden, Tim. ***Twenty Lectures on Algorithmic Game Theory***. Cambridge University Press, 2020. [Link](https://www.cambridge.org/core/books/twenty-lectures-on-algorithmic-game-theory/A9D9427C8F43E7DAEF8C702755B6D72B)
---
- [x] Will depend on #14163 once that PR is merged. The Fintype lemmas introduced by this PR have been added in that PR and will be removed from here once that PR gets merged
## Current plan for formalization of Game Theory
The current plan for the formalizing of Game Theory include:
#### 1. Auction Theory. 🎉 _(200+ lines, this PR)_
- Essential definitions of Sealed-bid auction, First-price auction and Second-price auction.
- First-price auction has no dominant strategy.
- Second-price auction has dominant strategy. (Second-price auction is DSIC)
#### 2. Mechanism design & Myerson's Lemma. 🎉 (400+ lines, pending for modification to Mathlib Standard)
- Mechanism design
An allocation rule is implementable if there exists
- Dominant Strategy Incentive Compatible (DSIC) payment rule
- An allocation rule is monotone if for every bidder’s gain is nondecreasing w.r.t. her/his bid
- Myerson's Lemma
Implementable ⇔ Monotone
In the above case, the DSIC payment rule is unique.
#### 3. von Neumann‘s Minimax Theorem. 🎉 (800+ lines, pending for modification to Mathlib Standard)
- Equilibrium in zero sum game
- Formalization strategy: via Loomis’s theorem.
#### 4. Nash Equilibrium. 🎉 (pending for modification to Mathlib Standard)
#### 5. Brouwer fixed-point theorem. (Work in Progress)
#### 6. More Mechanism design. (Planning)
|
merge-conflict
awaiting-author
new-contributor
t-logic
|
204/0 |
Mathlib.lean,Mathlib/GameTheory/Auction/Basic.lean,docs/references.bib |
3 |
148 |
['Shreyas4991', 'YaelDillies', 'eric-wieser', 'faenuccio', 'github-actions', 'grunweg', 'hcWang942', 'tb65536', 'urkud', 'vihdzp'] |
hcWang942 assignee:hcWang942 |
606-42114 1 year ago |
620-28302 620 days ago |
109-82807 109 days |
| 17675 |
astrainfinita author:astrainfinita |
perf: do not search algebraic hierarchy when searching `FunLike` hierarchy |
---
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Unification is still very slow.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
slow-typeclass-synthesis
t-algebra
label:t-algebra$ |
144/4 |
Mathlib.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/Rat.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/GroupWithZero/Hom.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Order/Hom/Basic.lean,Mathlib/Algebra/Ring/CentroidHom.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/Ring/Hom/Defs.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Operator/LinearIsometry.lean,Mathlib/GroupTheory/GroupAction/Hom.lean,Mathlib/RingTheory/Bialgebra/Equiv.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/Coalgebra/Equiv.lean,Mathlib/Topology/Algebra/Module/Basic.lean,Mathlib/Util/SetSynthOrder.lean,MathlibTest/TCSynth.lean,scripts/noshake.json |
24 |
5 |
['astrainfinita', 'github-actions', 'leanprover-bot'] |
nobody |
606-17247 1 year ago |
unknown |
0-0 0 seconds |
| 9344 |
erdOne author:erdOne |
feat: Add `AddGroup.FG` -> `Module.Finite ℤ` as instances |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-algebra
label:t-algebra$ |
4/0 |
Mathlib/RingTheory/Finiteness.lean |
1 |
4 |
['alreadydone', 'erdOne', 'leanprover-bot'] |
nobody |
605-26507 1 year ago |
904-26950 904 days ago |
21-27905 21 days |
| 12133 |
ADedecker author:ADedecker |
feat: generalize instIsLowerProd to arbitrary products |
Also change a bit the proof of the product case to match my own taste, feel free to tell if you prefer the old one.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-topology
t-order
|
34/14 |
Mathlib/Topology/Constructions.lean,Mathlib/Topology/Order/LowerUpperTopology.lean |
2 |
13 |
['Ruben-VandeVelde', 'TwoFX', 'github-actions', 'jcommelin', 'mans0954', 'mathlib-bors', 'riccardobrasca'] |
nobody |
604-36261 1 year ago |
755-31897 755 days ago |
63-69226 63 days |
| 16637 |
astrainfinita author:astrainfinita |
perf: reorder `extends` of `(Add)Monoid` |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-algebra
label:t-algebra$ |
46/51 |
Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Algebra/Ring/SumsOfSquares.lean,Mathlib/CategoryTheory/Preadditive/FunctorCategory.lean,Mathlib/Data/Finset/NoncommProd.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Torsion.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/Coalgebra/Hom.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean |
20 |
3 |
['astrainfinita', 'github-actions', 'leanprover-bot'] |
nobody |
604-35499 1 year ago |
669-42855 669 days ago |
1-49655 1 day |
| 18765 |
astrainfinita author:astrainfinita |
chore: changing `outParam` of `MulActionSemiHomClass` |
---
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[](https://gitpod.io/from-referrer/)
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merge-conflict
t-algebra
label:t-algebra$ |
60/34 |
Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/GroupTheory/GroupAction/Hom.lean |
4 |
4 |
['astrainfinita', 'github-actions', 'leanprover-bot'] |
nobody |
603-78160 1 year ago |
unknown |
0-0 0 seconds |
| 15822 |
kmill author:kmill |
feat: greedy colorings of finite graphs |
Proves that the greedy coloring only takes `G.maxDegree + 1` colors.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-combinatorics
|
159/0 |
Mathlib/Combinatorics/SimpleGraph/ConcreteColorings.lean |
1 |
1 |
['github-actions'] |
nobody |
601-16953 1 year ago |
unknown |
0-0 0 seconds |
| 8661 |
joelriou author:joelriou |
feat(CategoryTheory/Sites): descent of sheaves |
In this PR, it is shown that the category of sheaves on a site `(C, J)` identifies as a full subcategory of a category of families of sheaves equipped with a descent data (for a family of objects which cover the final object). Under suitable conditions, it shall be shown that this is an equivalence of categories (TODO).
---
This shall be split in small PRs later.
- [x] depends on: #8622
- [x] depends on: #8632
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-category-theory
|
1396/26 |
Mathlib.lean,Mathlib/CategoryTheory/Over.lean,Mathlib/CategoryTheory/Sites/CoverPreserving.lean,Mathlib/CategoryTheory/Sites/Descent.lean,Mathlib/CategoryTheory/Sites/EqualizerSheafCondition.lean,Mathlib/CategoryTheory/Sites/InducedTopology.lean,Mathlib/CategoryTheory/Sites/ObjectsCoverTop.lean,Mathlib/CategoryTheory/Sites/Over.lean,Mathlib/CategoryTheory/Sites/SheafHom.lean,Mathlib/CategoryTheory/Sites/Sieves.lean |
10 |
3 |
['github-actions'] |
nobody |
601-12481 1 year ago |
unknown |
0-0 0 seconds |
| 19055 |
JLimperg author:JLimperg |
Test precompilation (batteries + aesop) again |
|
merge-conflict |
9/8 |
lake-manifest.json,lakefile.lean |
2 |
5 |
['JLimperg', 'github-actions', 'leanprover-bot'] |
nobody |
600-80524 1 year ago |
unknown |
0-0 0 seconds |
| 10476 |
shuxuezhuyi author:shuxuezhuyi |
feat(Topology/UniformSpace): define uniform preordered space |
We define the semi-uniform structure and the uniform preordered space.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-topology
|
94/0 |
Mathlib.lean,Mathlib/Topology/UniformSpace/UniformOrder.lean,docs/references.bib |
3 |
2 |
['shuxuezhuyi'] |
nobody |
599-85535 1 year ago |
828-26563 828 days ago |
52-19273 52 days |
| 17593 |
astrainfinita author:astrainfinita |
chore(Algebra/Order/GroupWithZero/Unbundled): deprecate useless lemmas, use `ZeroLEOneClass` |
There are still some useless lemmas that were simply ported from `Algebra.Order.Monoid.Lemmas`, such as just chain an existing lemma with an assumption and lemmas whose assumptions imply `1 ≤ 0`. This PR removes them.
Also, some lemmas have both assumptions like `1 < a` `0 < a`. This PR uses `ZeroLEOneClass` to remove redundant assumptions.
---
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- [ ] depends on: #17623
Ported from https://github.com/leanprover-community/mathlib/pull/16525 and https://github.com/leanprover-community/mathlib/pull/18158
Adapted from #9250. This version is easier to review.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
blocked-by-other-PR
t-order
label:t-algebra$ |
188/48 |
Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/Counting.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/Order/Field.lean |
6 |
4 |
['astrainfinita', 'github-actions', 'mathlib4-dependent-issues-bot', 'vihdzp'] |
nobody |
599-22477 1 year ago |
640-8058 640 days ago |
0-74903 20 hours |
| 17623 |
astrainfinita author:astrainfinita |
feat(Algebra/Order/GroupWithZero/Unbundled): add some lemmas |
Some lemmas in `Algebra.Order.GroupWithZero.Unbundled` have incorrect or unsatisfactory names, or assumptions that can be omitted using `ZeroLEOneClass`. The lemmas added in this PR are versions of existing lemmas that use the correct or better name or `ZeroLEOneClass` to omit an assumption. The original lemmas will be deprecated in #17593.
| New name | Old name |
|-------------------------|-------------------------|
| `mul_le_one_left₀` | `Left.mul_le_one_of_le_of_le` |
| `mul_lt_one_of_le_of_lt_left₀` (`0 ≤ ·` version) / `mul_lt_one_of_le_of_lt_of_pos_left` | `Left.mul_lt_of_le_of_lt_one_of_pos` |
| `mul_lt_one_of_lt_of_le_left₀` | `Left.mul_lt_of_lt_of_le_one_of_nonneg` |
| `mul_le_one_right₀` | `Right.mul_le_one_of_le_of_le` |
| `mul_lt_one_of_lt_of_le_right₀` (`0 ≤ ·` version) / `mul_lt_one_of_lt_of_le_of_pos_right` | `Right.mul_lt_one_of_lt_of_le_of_pos` |
| `mul_lt_one_of_le_of_lt_right₀` | `Right.mul_lt_one_of_le_of_lt_of_nonneg` |
The following lemmas use `ZeroLEOneClass`.
| New name | Old name |
|-------------------------|-------------------------|
| `(Left.)one_le_mul₀` | `Left.one_le_mul_of_le_of_le` |
| `Left.one_lt_mul_of_le_of_lt₀` | `Left.one_lt_mul_of_le_of_lt_of_pos` |
| `Left.one_lt_mul_of_lt_of_le₀` | `Left.lt_mul_of_lt_of_one_le_of_nonneg` / `one_lt_mul_of_lt_of_le` (still there) |
| `(Left.)one_lt_mul₀` | |
| `Right.one_le_mul₀` | `Right.one_le_mul_of_le_of_le` |
| `Right.one_lt_mul_of_lt_of_le₀` | `Right.one_lt_mul_of_lt_of_le_of_pos` |
| `Right.one_lt_mul_of_le_of_lt₀` | `Right.one_lt_mul_of_le_of_lt_of_nonneg` / `one_lt_mul_of_le_of_lt` (still there) / `one_lt_mul` (still there) |
| `Right.one_lt_mul₀` | `Right.one_lt_mul_of_lt_of_lt` |
---
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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 |
599-22477 1 year ago |
606-15036 606 days ago |
33-64877 33 days |
| 18969 |
alreadydone author:alreadydone |
chore: generalize Module to NonUnitalSemiring |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-algebra
label:t-algebra$ |
94/75 |
Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/End.lean,Mathlib/Algebra/Group/Action/Prod.lean,Mathlib/Algebra/Group/Action/TypeTags.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/Module/Defs.lean,Mathlib/Algebra/Module/Submodule/Defs.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/GroupTheory/CoprodI.lean,Mathlib/LinearAlgebra/FreeModule/IdealQuotient.lean,Mathlib/LinearAlgebra/LinearDisjoint.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/TensorProduct/Submodule.lean,Mathlib/RingTheory/Filtration.lean,Mathlib/RingTheory/Flat/FaithfullyFlat.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/Defs.lean,Mathlib/RingTheory/Ideal/Lattice.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Prod.lean,Mathlib/RingTheory/Presentation.lean,Mathlib/RingTheory/Smooth/Kaehler.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean |
31 |
11 |
['alreadydone', 'eric-wieser', 'github-actions', 'leanprover-bot'] |
nobody |
597-46129 1 year ago |
unknown |
0-0 0 seconds |
| 17624 |
astrainfinita author:astrainfinita |
feat(Algebra/Order/GroupWithZero/Unbundled): generalize lemmas |
---
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- [ ] depends on: #17623
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
blocked-by-other-PR
t-order
label:t-algebra$ |
121/26 |
Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean |
1 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
595-59649 1 year ago |
640-6928 640 days ago |
0-465 7 minutes |
| 17513 |
astrainfinita author:astrainfinita |
perf: do not search algebraic hierarchies when using `map_*` lemmas |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-algebra
awaiting-bench
label:t-algebra$ |
5/3 |
Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/GroupTheory/GroupAction/Hom.lean |
2 |
10 |
['astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot'] |
nobody |
594-18671 1 year ago |
638-20536 638 days ago |
4-72589 4 days |
| 17515 |
astrainfinita author:astrainfinita |
perf: do not need `simp low` now |
---
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- [ ] depends on: #17513
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
blocked-by-other-PR
label:t-algebra$ |
12/10 |
Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Analysis/SpecialFunctions/Bernstein.lean,Mathlib/GroupTheory/GroupAction/Hom.lean,Mathlib/NumberTheory/LucasLehmer.lean |
4 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
594-18670 1 year ago |
643-6182 643 days ago |
0-380 6 minutes |
| 19212 |
Julian author:Julian |
feat(LinearAlgebra): add a variable_alias for VectorSpace |
Taken directly from the variable_alias docs.
Zulip: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/why.20.5Bvariable_alias.5D.20attribute.20is.20not.20used.20in.20Mathlib.3F
---
This is the first actual variable alias added to mathlib. I haven't reviewed variable_alias fully, but it seems like there's at least 3 ways they could be distributed in Mathlib:
* alongside whatever subfolder they "belong to" (which is what I've tentatively done here)
* In a file called `Aliases` somewhere near the thing they alias (which seems less discoverable to me)
* In a single file, a la `Mathlib.TrainingWheels` (with some less playful name) which is meant to define a bunch of more "friendly" aliases all in one place.
I kind of like the idea of the third thing as a future module but perhaps it can be synthesized if/when there are more aliases? For now as I say I've done the first one, but please let me know if someone prefers something else.
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
label:t-algebra$ |
25/0 |
Mathlib.lean,Mathlib/LinearAlgebra/VectorSpace.lean,scripts/noshake.json |
3 |
10 |
['Julian', 'PieterCuijpers', 'github-actions', 'urkud'] |
nobody |
593-23916 1 year ago |
593-23916 593 days ago |
7-68101 7 days |
| 19337 |
zeramorphic author:zeramorphic |
feat(Data/Finsupp): generalise `Finsupp` to any "zero" value |
Remove the explicit dependence of `Finsupp` on `[Zero M]`, instead defining `Finsupp'` (better name pending) to be functions that are equal to a fixed value `z : M` cofinitely often.
This PR is intended to do the initial work of replacing the definition of `Finsupp` with an instantiation of the more general definition, without adding any appropriate API. If accepted, the API development will follow in later PRs.
Issues to consider:
- Naming of `Finsupp'.`
- Where should `Finsupp'` lemmas go? Do they need their own file/folder under `Data/`?
Relevant Zulip threads:
- https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Finsupp.20generalisations
- https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Finsupp-like.20partial.20function
Comments are welcome.
---
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using the following format:
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- [ ] depends on: #xyz [optional extra text]
-->
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-data
|
203/83 |
Archive/Wiedijk100Theorems/Partition.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Rename.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/Data/Finsupp/BigOperators.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/Defs.lean,Mathlib/RingTheory/PowerBasis.lean,scripts/nolints_prime_decls.txt |
13 |
5 |
['github-actions', 'vihdzp', 'zeramorphic'] |
nobody |
590-86393 1 year ago |
590-86393 590 days ago |
4-60621 4 days |
| 18756 |
astrainfinita author:astrainfinita |
refactor: deprecate `DistribMulActionSemiHomClass` `MulSemiringActionSemiHomClass` |
---
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|
merge-conflict
t-algebra
label:t-algebra$ |
50/28 |
Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/GroupTheory/GroupAction/Hom.lean |
3 |
4 |
['astrainfinita', 'github-actions', 'leanprover-bot'] |
nobody |
579-52062 1 year ago |
579-52062 579 days ago |
31-53021 31 days |
| 19125 |
yhtq author:yhtq |
feat: add theorems to transfer `IsGalois` between pairs of fraction rings |
feat: add theorems to transfer `IsGalois` between pairs of fraction rings.
- [x] depends on: #18404
- [x] depends on: #19124
---
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|
merge-conflict
t-algebra
new-contributor
label:t-algebra$ |
121/0 |
Mathlib.lean,Mathlib/FieldTheory/Galois/IsFractionRing.lean,Mathlib/RingTheory/Localization/FractionRing.lean |
3 |
3 |
['github-actions', 'mathlib4-dependent-issues-bot', 'tb65536'] |
nobody |
576-64531 1 year ago |
603-25913 603 days ago |
0-1980 33 minutes |
| 18841 |
hrmacbeth author:hrmacbeth |
chore: change some `linarith`s to `linear_combination`s |
Change 100 `linarith`s to `linear_combination`s; this is generally a slight speedup.
---
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[](https://gitpod.io/from-referrer/)
- [x] depends on: #18714 (not strictly blocked by this, but the speed comparison will be more informative after it)
|
merge-conflict
WIP
|
106/107 |
Archive/Imo/Imo1959Q2.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2013Q5.lean,Archive/Imo/Imo2021Q1.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Complex/AbelLimit.lean,Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Convex/Slope.lean,Mathlib/Analysis/Convex/SpecificFunctions/Basic.lean,Mathlib/Analysis/Convex/Uniform.lean,Mathlib/Analysis/Convex/Visible.lean,Mathlib/Analysis/FunctionalSpaces/SobolevInequality.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/PSeries.lean,Mathlib/Analysis/SpecialFunctions/Gamma/BohrMollerup.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/Log/Monotone.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Analysis/SpecificLimits/FloorPow.lean,Mathlib/MeasureTheory/Covering/BesicovitchVectorSpace.lean,Mathlib/MeasureTheory/Measure/Lebesgue/VolumeOfBalls.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/NumberTheory/Transcendental/Liouville/LiouvilleWith.lean,Mathlib/Probability/Distributions/Pareto.lean |
30 |
29 |
['github-actions', 'grunweg', 'hrmacbeth', 'jcommelin', 'leanprover-bot', 'mathlib4-dependent-issues-bot'] |
nobody |
575-25457 1 year ago |
597-47703 597 days ago |
3-28253 3 days |
| 11142 |
hmonroe author:hmonroe |
feat(ProofTheory): Define logical symbols abstractly; opens new top-level section, drawing from lean4-logic |
---
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|
merge-conflict
awaiting-author
t-logic
|
468/1 |
Mathlib.lean,Mathlib/Data/Fin/VecNotation.lean,Mathlib/ProofTheory/LogicSymbol.lean |
3 |
19 |
['PatrickMassot', 'YaelDillies', 'avigad', 'fpvandoorn', 'github-actions'] |
nobody |
569-35277 1 year ago |
766-8926 766 days ago |
94-3235 94 days |
| 11210 |
hmonroe author:hmonroe |
Test commit |
---
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|
merge-conflict
WIP
|
1950/1 |
Mathlib.lean,Mathlib/Data/Fin/VecNotation.lean,Mathlib/ProofTheory/Calculus.lean,Mathlib/ProofTheory/FirstOrder/Arith/Language.lean,Mathlib/ProofTheory/FirstOrder/Basic/Syntax/Term.lean,Mathlib/ProofTheory/LogicSymbol.lean,Mathlib/ProofTheory/Matrix.lean,Mathlib/ProofTheory/Semantics.lean,Mathlib/ProofTheory/System.lean,docs/references.bib |
10 |
100 |
['github-actions'] |
nobody |
569-35276 1 year ago |
855-24757 855 days ago |
2-67901 2 days |
| 19621 |
Command-Master author:Command-Master |
feat: Multiplicity and prime-adic valuation of derivations |
---
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- [ ] depends on: #19596
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
blocked-by-other-PR
large-import
label:t-algebra$ |
397/13 |
Mathlib.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Order/WithBot.lean,Mathlib/RingTheory/Derivation/Multiplicity.lean,Mathlib/RingTheory/DiscreteValuationRing/Basic.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/PrimeMultiplicity.lean |
9 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
569-17537 1 year ago |
589-42886 589 days ago |
0-666 11 minutes |
| 18262 |
joelriou author:joelriou |
feat(Algebra/Category/ModuleCat/Presheaf): exterior powers of presheaves of modules |
---
- [x] depends on: #18261
- [ ] depends on: #18236
- [ ] depends on: #18197
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|
WIP
t-algebra
blocked-by-other-PR
t-category-theory
merge-conflict
label:t-algebra$ |
874/0 |
Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/FunctorOfNatTrans.lean,Mathlib/Algebra/Category/ModuleCat/Pseudofunctor.lean |
6 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
569-8832 1 year ago |
unknown |
0-0 0 seconds |
| 18294 |
astrainfinita author:astrainfinita |
perf: make `Mul.toSMul` higher priority |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-bench
t-algebra
label:t-algebra$ |
2/5 |
Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Order/Field/Pointwise.lean,Mathlib/Combinatorics/Additive/AP/Three/Defs.lean,Mathlib/Topology/Algebra/Module/WeakBilin.lean |
4 |
4 |
['astrainfinita', 'github-actions', 'leanprover-bot'] |
nobody |
564-16469 1 year ago |
unknown |
0-0 0 seconds |
| 15269 |
kkytola author:kkytola |
feat: Add ENNReal.floor |
A right-continuous floor function on `ENNReal`.
---
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- [x] depends on: #13938
- [ ] depends on: #15773 (general type class for `ENat`-valued floor functions)
- [x] depends on: #15380 (topology on `ENat` is needed to state right continuity of the floor function)
[](https://gitpod.io/from-referrer/)
|
t-algebra
blocked-by-other-PR
t-order
merge-conflict
awaiting-author
label:t-algebra$ |
445/0 |
Mathlib.lean,Mathlib/Algebra/Order/EFloor.lean,Mathlib/Data/ENNReal/Floor.lean,Mathlib/Data/Nat/Lattice.lean |
4 |
18 |
['YaelDillies', 'github-actions', 'kkytola', 'urkud'] |
nobody |
555-76166 1 year ago |
704-71232 704 days ago |
0-3440 57 minutes |
| 15773 |
kkytola author:kkytola |
feat: Add type class for ENat-valued floor functions |
This PR adds a type class for extended natural number -valued floor functions. This is split off from #15269, where the suggestions were to make the floor function on ENNReal ENat-valued and to have an API mimicling FloorSemirings. Besides ENNReal, at least ENNRat would naturally satisfy the general type class.
---
Two things are worth noting:
* To fully mimic `FloorSemiring` API, also ceiling functions need to be added. The plan is to do that in a later PR.
* The PR introduces the class `CastNatENatClass` to ensure that `natCast` and a coercion from `ENat` behave in the natural and order-respecing manner. This feels a little ad hoc, but such assumptions are needed for general `ENat`-valued floor functions to behave well.
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|
merge-conflict
awaiting-author
t-order
|
231/0 |
Mathlib.lean,Mathlib/Algebra/Order/EFloor.lean,Mathlib/Data/ENat/Basic.lean |
3 |
5 |
['YaelDillies', 'github-actions', 'kkytola', 'urkud'] |
nobody |
555-76043 1 year ago |
631-75396 631 days ago |
66-24436 66 days |
| 3251 |
kmill author:kmill |
feat: deriving `LinearOrder` for simple enough inductive types |
Uses the same machinery underlying the `Fintype` derive handler to derive a lexicographical `LinearOrder` for non-recursive inductive types that have no indices.
In principle more complicated types can have `LinearOrder`s, but that would require a more sophisticated implementation.
---
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- [x] depends on: #3198
[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
awaiting-author
t-meta
|
82/0 |
Mathlib.lean,Mathlib/Tactic/DeriveLinearOrder.lean |
2 |
5 |
['ChrisHughes24', 'kim-em', 'kmill', 'vihdzp'] |
nobody |
553-50696 1 year ago |
1179-52727 1179 days ago |
1-80343 1 day |
| 3610 |
TimothyGu author:TimothyGu |
feat: derive Infinite automatically for inductive types |
Deals with recursive types, but not mutually recursive types or types with indices right now. See docstring for details.
---
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|
merge-conflict
awaiting-author
t-meta
|
517/0 |
Mathlib.lean,Mathlib/Tactic/DeriveInfinite.lean,test/DeriveInfinite.lean |
3 |
11 |
['TimothyGu', 'digama0', 'eric-wieser', 'grunweg', 'kim-em', 'kmill'] |
kmill assignee:kmill |
553-50695 1 year ago |
1165-45737 1165 days ago |
9-24079 9 days |
| 16120 |
awainverse author:awainverse |
feat(ModelTheory/Algebra/Ring/Basic): Ring homomorphisms are a `StrongHomClass` for the language of rings |
Adds an `IsAlgebraic` instance to the language of rings
Adds a `StrongHomClass` instance to the type of ring homomorphisms between rings with `CompatibleRing` structures
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
RFC
t-logic
label:t-algebra$ |
34/13 |
Mathlib/ModelTheory/Algebra/Ring/Basic.lean |
1 |
10 |
['ChrisHughes24', 'YaelDillies', 'awainverse', 'github-actions', 'jcommelin'] |
nobody |
551-68236 1 year ago |
551-68236 551 days ago |
135-29017 135 days |
| 20527 |
trivial1711 author:trivial1711 |
refactor(Topology/UniformSpace/Completion): more descriptive names for `α → Completion α` |
- We rename the various maps `α → Completion α` in order to make their names more consistent.
- Let `α` be a uniform space. We rename the uniformly continuous function `α → Completion α` from `UniformSpace.Completion.coe'` to `UniformSpace.Completion.coe`.
- Let `α` be a uniform additive group. We rename the additive group homomorphism `α →+ Completion α` from `UniformSpace.Completion.toCompl` to `UniformSpace.Completion.coeAddHom`.
- Let `α` be a uniform ring. The ring homomorphism `α →+* Completion α` is called `UniformSpace.Completion.coeRingHom`; its name is unchanged.
- Let `α` be a normed space over a field `𝕜`. We rename the linear isometry `α →ₗᵢ[𝕜] Completion α` from `UniformSpace.Completion.toComplₗᵢ` to `UniformSpace.Completion.coeₗᵢ`.
- Let `α` be a normed space over a field `𝕜`. We rename the continuous linear map `α →L[𝕜] Completion α` from `UniformSpace.Completion.toComplL` to `UniformSpace.Completion.coeL`.
- Let `α` be a normed additive group. We rename the norm preserving homomorphism `NormedAddGroupHom α (Completion α)` from `NormedAddCommGroup.toCompl` to `UniformSpace.Completion.coeNormedAddGroupHom`.
- We analogously rename some other theorems.
- We add some trivial theorems (all of which are proved by `rfl`) that state that the functions considered above are equal. We give all of them the `simp` and `norm_cast` attributes.
- We add a new theorem `UniformSpace.Completion.coeAddHom_eq_coe` that states that `UniformSpace.Completion.coeAddHom` and `UniformSpace.Completion.coe` are equal as functions.
- We similarly add a new theorem `UniformSpace.Completion.coeRingHom_eq_coe`.
- We rename the theorem `UniformSpace.Completion.coe_toComplₗᵢ` to `UniformSpace.Completion.coeₗᵢ_eq_coe`.
- We rename the theorem `UniformSpace.Completion.coe_toComplL` to `UniformSpace.Completion.coeL_eq_coe`.
- We similarly add a new theorem `UniformSpace.Completion.coeNormedAddGroupHom_eq_coe`.
- We change all occurrences of the string `((↑) : α → Completion α)` to `(coe : α → Completion α)` or just `coe`.
- We put the statements of some theorems into simp normal form by using the plain function `coe` rather than the homomorphisms that carry more structure.
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-topology
|
130/92 |
Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Complex/AbsMax.lean,Mathlib/Analysis/Complex/Liouville.lean,Mathlib/Analysis/InnerProductSpace/Completion.lean,Mathlib/Analysis/Normed/Group/HomCompletion.lean,Mathlib/Analysis/Normed/Module/Completion.lean,Mathlib/Analysis/SpecialFunctions/NonIntegrable.lean,Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean,Mathlib/Topology/Algebra/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/Nonarchimedean.lean,Mathlib/Topology/Algebra/Nonarchimedean/Completion.lean,Mathlib/Topology/Algebra/UniformRing.lean,Mathlib/Topology/Category/UniformSpace.lean,Mathlib/Topology/MetricSpace/Completion.lean,Mathlib/Topology/UniformSpace/Completion.lean |
17 |
4 |
['eric-wieser', 'github-actions', 'trivial1711'] |
nobody |
545-12868 1 year ago |
545-12868 545 days ago |
6-66637 6 days |
| 17739 |
Aaron1011 author:Aaron1011 |
feat(Topology/Order/DenselyOrdered): prove Not (IsOpen) for intervals |
Prove that Iic/Ici/Ioc/Ico/Icc intervals are not open in densely ordered topologies with no min/max element
---
[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-topology
new-contributor
|
27/0 |
Mathlib/Topology/Order/DenselyOrdered.lean |
1 |
8 |
['github-actions', 'vihdzp'] |
nobody |
543-143 1 year ago |
635-78113 635 days ago |
0-4704 1 hour |
| 18474 |
astrainfinita author:astrainfinita |
perf: lower the priority of `*WithOne.to*` instances |
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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From #7873.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
slow-typeclass-synthesis
t-algebra
t-data
label:t-algebra$ |
9/2 |
Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Data/Int/Cast/Defs.lean,Mathlib/Data/Nat/Cast/Defs.lean |
3 |
7 |
['astrainfinita', 'eric-wieser', 'github-actions', 'leanprover-bot'] |
nobody |
542-86298 1 year ago |
542-86298 542 days ago |
76-66916 76 days |
| 20656 |
Komyyy author:Komyyy |
feat(Mathlib/Geometry/Manifold/VectorBundle/Sphere): convert orthogonal smooth `M → 𝕊ⁿ` & `M → ℝⁿ⁺¹` to smooth `M → T𝕊ⁿ` |
Current Mathlib has no easy way to define function from a manifold to tangent bundles of sphere: `T𝕊ⁿ`.
This PR gives this: `sphereTangentMap`. This convert orthogonal smooth `M → 𝕊ⁿ` & `M → ℝⁿ⁺¹` to smooth `M → T𝕊ⁿ`.
I also proved that if `f : M → 𝕊ⁿ` & `g : M → ℝⁿ⁺¹` are smooth then `sphereTangentMap` of `f` & `g` is smooth too.
---
⚠ **CAUTION**
I formalized this in my spare time.
I don't have the energy to maintain the PR, but I create this PR so this may helps everyone.
The only one thing to do is proof cleanup.
TODO:
- [x] `contDiff_uncurry_stereoInvFunAux` & `coe_sphere_comp_stereoInvFun` may have to be moved to `Mathlib.Geometry.Manifold.Instances.Sphere`.
- [ ] Proof cleanup. Current proof may be redundant and ugly.
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[](https://gitpod.io/from-referrer/)
|
please-adopt
merge-conflict
t-differential-geometry
|
246/6 |
Mathlib.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/Geometry/Manifold/VectorBundle/Sphere.lean |
3 |
1 |
['github-actions'] |
nobody |
542-34832 1 year ago |
unknown |
0-0 0 seconds |
| 15711 |
znssong author:znssong |
feat(Combinatorics/SimpleGraph): Some lemmas about walk, cycle and Hamiltonian cycle |
---
These lemmas are separated from the `meow-sister/BondyChvatal` branch and will be needed for the proof of the Bondy-Chvátal theorem.
- [x] depends on: #15536
- [x] depends on: #16294 |
merge-conflict
awaiting-author
t-combinatorics
new-contributor
|
407/3 |
Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Path.lean,Mathlib/Combinatorics/SimpleGraph/Walk.lean |
4 |
22 |
['Rida-Hamadani', 'YaelDillies', 'github-actions', 'mathlib4-dependent-issues-bot', 'znssong'] |
nobody |
542-19229 1 year ago |
663-30390 663 days ago |
9-13962 9 days |
| 18629 |
tomaz1502 author:tomaz1502 |
feat(Computability.Timed): Formalization of runtime complexity of List.merge |
This PR adds the formalization of the runtime complexity of the merge function, defined in `Data/List/Sort`.
Requires: https://github.com/leanprover-community/mathlib4/pull/15450
References:
- Previous PR on mathlib3: https://github.com/leanprover-community/mathlib3/pull/14494/
- First discussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/BSc.20Final.20Project/near/220647062
- Second disussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Formalization.20of.20Runtime.20Complexity.20of.20Sorting.20Algorithms/near/284184450
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-computability
awaiting-author
new-contributor
|
186/0 |
Mathlib.lean,Mathlib/Computability/Timed/InsertionSort.lean,Mathlib/Computability/Timed/Merge.lean |
3 |
2 |
['github-actions', 'trivial1711'] |
nobody |
541-71548 1 year ago |
581-71161 581 days ago |
33-11262 33 days |
| 14412 |
jjaassoonn author:jjaassoonn |
feat: show stalk of presheaf of modules is a module over stalk of ring |
---
<!-- The text above the `---` will become the commit message when your
PR is merged. Please leave a blank newline before the `---`, otherwise
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- [x] depends on: #14413
- [ ] depends on: #14501
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebraic-geometry
blocked-by-other-PR
workshop-AIM-AG-2024
|
966/2 |
Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/OverColimitsRing'.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/OverColimitsRing.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Limits/ConcreteCategory.lean,Mathlib/Geometry/RingedSpace/Basic.lean,Mathlib/Geometry/RingedSpace/Module.lean,Mathlib/Topology/Sheaves/Stalks.lean |
8 |
5 |
['github-actions', 'jjaassoonn', 'smorel394'] |
nobody |
540-3731 1 year ago |
unknown |
0-0 0 seconds |
| 8362 |
urkud author:urkud |
feat(Asymptotics): define `ReflectsGrowth` |
---
<!-- The text above the `---` will become the commit message when your
PR is merged. Please leave a blank newline before the `---`, otherwise
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- [x] depends on: #8349
[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-analysis
|
268/0 |
Mathlib.lean,Mathlib/Analysis/Asymptotics/ReflectsGrowth.lean |
2 |
14 |
['YaelDillies', 'fpvandoorn', 'github-actions', 'urkud'] |
nobody |
539-78802 1 year ago |
731-44229 731 days ago |
240-47513 240 days |
| 6692 |
prakol16 author:prakol16 |
feat: disjoint indexed union of local homeomorphisms |
Add disjoint indexed union of local equivs and local homeomorphisms
---
This is leading up to PRing some things related to covering spaces that I wrote a long time ago in lean 3 but never submitted a PR for. Note that this was converted using mathport.
<!-- The text above the `---` will become the commit message when your
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-topology
|
126/0 |
Mathlib/Logic/Equiv/PartialEquiv.lean,Mathlib/Topology/PartialHomeomorph.lean |
2 |
4 |
['alreadydone', 'github-actions', 'winstonyin'] |
nobody |
539-63398 1 year ago |
631-73417 631 days ago |
118-5497 118 days |
| 18461 |
hannahfechtner author:hannahfechtner |
feat: left and right common multiples mixins |
add mixins for left and right common multiples. These carry the data of what factors are used to create the common multiples
---
<!-- The text above the `---` will become the commit message when your
PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-algebra
new-contributor
label:t-algebra$ |
78/0 |
Mathlib/Algebra/Group/Defs.lean |
1 |
13 |
['github-actions', 'hannahfechtner', 'jcommelin', 'kbuzzard', 'kim-em', 'trivial1711'] |
nobody |
538-32728 1 year ago |
538-32728 538 days ago |
69-35596 69 days |
| 19291 |
PieterCuijpers author:PieterCuijpers |
feat(Algebra/Order/Hom): add quantale homomorphism |
Definition of quantale homomorphisms as functions that are both semigroup homomorphisms and complete lattice homomorphisms.
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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- [x] depends on: #19810
- [x] depends on: #19811
[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-algebra
new-contributor
label:t-algebra$ |
209/0 |
Mathlib.lean,Mathlib/Algebra/Order/Hom/Quantale.lean,scripts/noshake.json |
3 |
29 |
['PieterCuijpers', 'YaelDillies', 'github-actions', 'kim-em', 'mathlib4-dependent-issues-bot'] |
nobody |
537-6807 1 year ago |
542-60608 542 days ago |
29-51480 29 days |
| 19352 |
hrmacbeth author:hrmacbeth |
chore: change some `nlinarith`s to `linear_combination`s |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
|
13/13 |
Archive/Imo/Imo2021Q1.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Mathlib/Analysis/Normed/Group/AddCircle.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Ring/Units.lean,Mathlib/Analysis/SpecialFunctions/Complex/LogBounds.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Increment.lean,Mathlib/NumberTheory/Modular.lean |
8 |
4 |
['github-actions', 'hrmacbeth', 'leanprover-bot'] |
nobody |
535-36018 1 year ago |
597-47723 597 days ago |
0-8636 2 hours |
| 20372 |
jvlmdr author:jvlmdr |
feat(MeasureTheory/Function): Add ContinuousLinearMap.bilinearCompLp(L) |
Introduce ContinuousLinearMap.bilinearCompLp and bilinearCompLpL.
Generalize eLpNorm_le_eLpNorm_mul_eLpNorm theorems to include constant C in bound condition.
---
Expect this may be useful for defining tempered distributions from functions in `L^p`.
The definitions more or less follow `ContinuousLinearMap.compLp...`. Names are loosely analogous to `ContinuousLinearMap.bilinearComp` and `SchwartzMap.bilinLeftCLM`.
Note: I preferred the spelling `hpqr : p⁻¹ + q⁻¹ = r⁻¹` with `f` in `L^p` and `g` in `L^q` to `hpqr : 1 / p = 1 / q + 1 / r`. It's easier to obtain from `ENNReal.IsConjExponent` too.
A few questions:
- [ ] I defined `bilinear{Left,Right}LpL` in addition to `bilinearCompLpL` because `LinearMap.mkContinuous₂` is marked as `noncomputable` and `LinearMap.mkContinuous` is not. Is this worth the extra definitions? (Note: This is not visible in the source due to `noncomputable section`.)
- [ ] Should I use `C : ℝ` instead of `C : NNReal` for `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'`?
- [ ] Is it going to be painful to have `[Fact (1 ≤ p)] [Fact (1 ≤ q)] [Fact (1 ≤ r)]`? I don't think there's a way to avoid it though. Maybe providing specialized versions for `p.IsConjExponent q` with `L^1`?
Naming:
- [ ] Is it satisfactory to add a `'` to the `eLpNorm_le_eLpNorm_mul_eLpNorm ` definitions in `CompareExp.lean` where `≤ ‖f x‖ * ‖g x‖` has been replaced with `≤ C * ‖f x‖ * ‖g x‖`? These could replace the existing theorems, although I don't want to break backwards compatibility. There are 5 instances: `eLpNorm_le_eLpNorm_top_mul_eLpNorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm_top'`, `eLpNorm'_le_eLpNorm'_mul_eLpNorm''`, `eLpNorm_le_eLpNorm_mul_eLpNorm_of_nnnorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'` (I'm not sure why the existing theorem `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm` has an internal `'`)
- [ ] Is `bilinearLeftLpL` a suitable name? Other options: `bilinearCompLpLeftL`, `bilinearCompLeftLpL`, `bilinLeftLpL` (analogous to `SchwartzMap.bilinLeftCLM`)
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|
merge-conflict
t-measure-probability
new-contributor
|
203/40 |
Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSpace.lean |
2 |
1 |
['github-actions'] |
nobody |
530-24155 1 year ago |
530-24155 530 days ago |
27-43617 27 days |
| 2605 |
eric-wieser author:eric-wieser |
chore: better error message in linarith |
On this mwe:
```lean
import Mathlib.Tactic.Linarith
example (s : Set ℕ) (h : s = s) : 0 ≤ 1 :=
by linarith
```
this now indicates where the internal error is coming from.
Is there a better way of chaining errors than this?
---
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|
merge-conflict
awaiting-author
t-meta
|
12/1 |
Mathlib/Tactic/Linarith/Preprocessing.lean |
1 |
3 |
['Vierkantor', 'harahu', 'kim-em', 'mo271'] |
nobody |
528-14748 1 year ago |
1175-46287 1175 days ago |
51-42225 51 days |
| 11837 |
trivial1711 author:trivial1711 |
feat: completion of a uniform multiplicative group |
Multiplicativize `Topology.Algebra.GroupCompletion`. That is, rewrite it in the multiplicative setting and recover the original results using `@[to_additive]`.
- Because `@[to_additive]` doesn't work with `noncomputable section` (https://github.com/leanprover/lean4/pull/2610), some instances with `@[to_additive]` need to be explicitly marked with `noncomputable instance`.
- One might be tempted to multiplicativize this definition from `Topology.Algebra.GroupCompletion`:
```lean
instance [UniformSpace α] [Add α] : Add (Completion α) :=
⟨Completion.map₂ (· + ·)⟩
```
to this:
```lean
@[to_additive]
instance [UniformSpace α] [Mul α] : Mul (Completion α) :=
⟨Completion.map₂ (· * ·)⟩
```
However, as Eric Wieser pointed out, doing so would create a bad diamond with the definition
```lean
instance [UniformSpace α] [TopologicalRing α] [UniformAddGroup α] [Ring α] : Mul (Completion α) :=
⟨curry <| (denseInducing_coe.prod denseInducing_coe).extend ((↑) ∘ uncurry (· * ·))⟩
```
in `Topology.Algebra.UniformRing`.
How should this diamond be resolved? Well, the definition of multiplication that uses `curry <| (denseInducing_coe.prod denseInducing_coe).extend ((↑) ∘ uncurry (· * ·))` is the "correct" one. For example, it yields the correct result if `α` is `ℚ`, unlike the definition that uses `Completion.map₂ (· * ·)`. (This is because `Completion.map₂` yields junk values if used on a function which is not uniformly continuous. Note, however, that if multiplication on `α` *is* uniformly continuous, then `Completion.map₂ (· * ·)` and `curry <| (denseInducing_coe.prod denseInducing_coe).extend ((↑) ∘ uncurry (· * ·))` are propositionally equal.) So, following Eric's suggestion, we remove the definition that uses `Completion.map₂ (· * ·)`, and generalize the other definition to any uniform space with a multiplication operation:
```lean
@[to_additive]
noncomputable instance [UniformSpace α] [Mul α] : Mul (Completion α) :=
⟨curry <| (denseInducing_coe.prod denseInducing_coe).extend ((↑) ∘ uncurry (· * ·))⟩
```
This requires slightly modifying some of the proofs in `Topology.Algebra.GroupCompletion`. For example, suppose that `α` is a uniform group. Since we can no longer use `Completion.continuous_map₂`, it becomes more efficient to prove that the multiplication, inversion, and division operations on `Completion α` are uniformly continuous *before* we prove that `Completion α` is a group.
- Previously, `Topology.Algebra.GroupCompletion` had an instance:
```lean
instance [UniformSpace α] [Sub α] : Sub (Completion α) := ...
```
Naively multiplicativizing this would yield
```lean
@[to_additive]
instance [UniformSpace α] [Inv α] : Inv (Completion α) := ...
```
Unfortunately, this would conflict with `Topology.Algebra.UniformField`, which already instantiates `Inv (Completion α)` when `α` is a uniform field. Instead, we use two different `instance` declarations. (If `α` is an additive group, then this instantiates `Neg (Completion α)` twice, and the instances are syntactically equal.)
```lean
@[to_additive]
noncomputable instance [UniformSpace α] [Group α] : Inv (Completion α) := ...
instance [UniformSpace α] [Neg α] : Neg (Completion α) := ...
```
This avoids the bad diamond (because a uniform field can never be a `Group`) while remaining backward compatible. Note that the `@[to_additive]` is necessary here, because it maintains the link between the additive setting and multiplicative setting. We use a similar method to instantiate `Div (Completion α)`.
- Some definitions in this file involve a module structure on `α`. We leave these as is and do not attempt to multiplicativize them at all.
- The instance of `DistribMulAction` must be multiplicativized to an instance of `MulDistribMulAction` manually.
Zulip thread: https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Completion.20of.20a.20uniform.20multiplicative.20group
---
# (Small) Issue
Recall the following trick that this pull request uses to define inversion and negation on uniform spaces. The idea is that we define negation on the completion of any uniform space that has a negation operation, but we define inversion on only the completion of a uniform space that has the structure of a multiplicative group. We do this to avoid creating a bad diamond with the inversion operation on a uniform field.
```lean
@[to_additive]
noncomputable instance {α : Type*} [UniformSpace α] [Group α] : Inv (Completion α) := ...
instance {α : Type*} [UniformSpace α] [Neg α] : Neg (Completion α) := ...
```
Now, suppose that we want to prove `coe_inv_of_group` (resp. `coe_neg`), which states that the coercion `α → Completion α` commutes with inversion (resp. negation). In the current version of this pull request, `coe_inv_of_group` (resp. `coe_neg`) only applies to uniform multiplicative (resp. additive) groups. However, we do not use the fact that multiplication (resp. addition) on `α` is uniformly continuous to prove it. We only use the fact that inversion (resp. negation) is continuous. So, what we really want is to have more general statements that look like this:
```lean
theorem coe_inv_of_group {α : Type*} [UniformSpace α] [Group α] [ContinuousInv α] : ...
theorem coe_neg {α : Type*} [UniformSpace α] [Neg α] [ContinuousNeg α] : ...
```
Note that `coe_inv_of_group` needs the assumption `[Group α]`, because otherwise inversion is not defined on `Completion α` at all. However, `coe_neg` does not need the analogous assumption `[AdditiveGroup α]`.
The question is: If `coe_inv_of_group` and `coe_neg` are written in this more general form, how can we link them using `@[to_additive]`? Here is one option, but it obviously leaves something to be desired.
```lean
@[to_additive coe_neg_do_not_use_this_use_the_more_general_version]
theorem coe_inv_of_group {α : Type*} [UniformSpace α] [Group α] [ContinuousInv α] : ...
theorem coe_neg {α : Type*} [UniformSpace α] [Neg α] [ContinuousNeg α] : ...
```
Co-authored-by: Eric Wieser
---
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|
WIP
t-algebra
merge-conflict
help-wanted
t-topology
label:t-algebra$ |
342/217 |
Mathlib/Analysis/InnerProductSpace/Completion.lean,Mathlib/Analysis/Normed/Group/HomCompletion.lean,Mathlib/Analysis/Normed/Module/Completion.lean,Mathlib/Topology/Algebra/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/GroupCompletion.lean,Mathlib/Topology/Algebra/Nonarchimedean/Completion.lean,Mathlib/Topology/Algebra/UniformField.lean,Mathlib/Topology/Algebra/UniformMulAction.lean,Mathlib/Topology/Algebra/UniformRing.lean |
9 |
14 |
['eric-wieser', 'github-actions', 'trivial1711'] |
nobody |
527-78653 1 year ago |
557-4532 557 days ago |
101-63337 101 days |
| 12670 |
trivial1711 author:trivial1711 |
feat: completion of a nonarchimedean multiplicative group |
We prove that the completion of a nonarchimedean multiplicative group is a nonarchimedean multiplicative group.
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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- [x] depends on: #12669
- [ ] depends on: #11837
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
t-topology
blocked-by-other-PR
label:t-algebra$ |
358/228 |
Mathlib/Analysis/InnerProductSpace/Completion.lean,Mathlib/Analysis/Normed/Group/HomCompletion.lean,Mathlib/Analysis/Normed/Module/Completion.lean,Mathlib/Topology/Algebra/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/GroupCompletion.lean,Mathlib/Topology/Algebra/Nonarchimedean/Completion.lean,Mathlib/Topology/Algebra/UniformField.lean,Mathlib/Topology/Algebra/UniformMulAction.lean,Mathlib/Topology/Algebra/UniformRing.lean |
9 |
2 |
['github-actions', 'leanprover-community-mathlib4-bot'] |
nobody |
527-78530 1 year ago |
554-59986 554 days ago |
50-17994 50 days |
| 21384 |
alreadydone author:alreadydone |
experiment: make submodule quotient reducibly defeq to additive group quotient |
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
t-algebra label:t-algebra$ |
1/1 |
Mathlib/LinearAlgebra/Quotient/Defs.lean |
1 |
1 |
['github-actions'] |
nobody |
524-3895 1 year ago |
unknown |
0-0 0 seconds |
| 9449 |
hmonroe author:hmonroe |
feat: Add Turing machine with the quintet definition (TMQ) and a chainable step function for each TM type |
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-computability
awaiting-author
|
458/1 |
Mathlib/Computability/TuringMachine.lean,Mathlib/Logic/PartArith.lean |
2 |
8 |
['eric-wieser', 'github-actions', 'hmonroe'] |
nobody |
522-43332 1 year ago |
866-56384 866 days ago |
53-6945 53 days |
| 18719 |
astrainfinita author:astrainfinita |
perf: lower the priority of `SemilinearMapClass.toAddHomClass` |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
slow-typeclass-synthesis
t-algebra
awaiting-bench
label:t-algebra$ |
14/7 |
Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unique.lean,MathlibTest/TCSynth.lean |
3 |
4 |
['astrainfinita', 'github-actions', 'leanprover-bot'] |
nobody |
521-18149 1 year ago |
unknown |
0-0 0 seconds |
| 19697 |
quangvdao author:quangvdao |
feat(BigOperators/Fin): Sum/product over `Fin` intervals |
This PR adds new theorems about the sum/product of some vector over `Fin` intervals. One example is:
```
@[to_additive]
theorem prod_Iic_succ (i : Fin n) :
∏ j ∈ Iic i.succ, v j = (∏ j ∈ Iic i.castSucc, v j) * v i.succ
```
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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- [x] depends on: #20360
This is in preparation for reworking `finSigmaFinEquiv` and `finProdFinEquiv` in #19013.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-data
|
87/12 |
Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Data/Fintype/Fin.lean,Mathlib/Order/Interval/Finset/Fin.lean |
3 |
20 |
['Ruben-VandeVelde', 'YaelDillies', 'eric-wieser', 'github-actions', 'mathlib4-dependent-issues-bot', 'quangvdao'] |
nobody |
519-85750 1 year ago |
554-35280 554 days ago |
6-25961 6 days |
| 19353 |
hrmacbeth author:hrmacbeth |
chore: golf some term/rw proofs using `linear_combination` |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
|
47/102 |
Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Mathlib/Analysis/Convex/Slope.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/MeasureTheory/Integral/RieszMarkovKakutani.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/NumberTheory/Zsqrtd/Basic.lean,Mathlib/Topology/ContinuousMap/ZeroAtInfty.lean |
7 |
5 |
['github-actions', 'grunweg', 'hrmacbeth', 'leanprover-bot'] |
grunweg assignee:grunweg |
518-84871 1 year ago |
597-47715 597 days ago |
0-7781 2 hours |
| 20248 |
peabrainiac author:peabrainiac |
feat(Topology/Compactness): first-countable locally path-connected spaces are delta-generated |
Shows that all first-countable locally path-connected spaces are delta-generated (so in particular all normed spaces and convex subsets thereof are), and that delta-generated spaces are equivalently generated by the unit interval or standard simplices.
---
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- [ ] depends on: #21616
In principle, this should be close to all that's required to show that all simplicial complexes and CW-complexes are delta-generated; I just haven't done it yet because I'm not sure which file to best do it in.
[](https://gitpod.io/from-referrer/)
|
blocked-by-other-PR
large-import
new-contributor
merge-conflict
awaiting-author
t-topology
|
1189/813 |
Mathlib.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Topology/Algebra/Module/LocallyConvex.lean,Mathlib/Topology/Compactness/DeltaGeneratedSpace.lean,Mathlib/Topology/Connected/LocPathConnected.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/Homotopy/HSpaces.lean,Mathlib/Topology/Path.lean |
9 |
22 |
['YaelDillies', 'github-actions', 'kbuzzard', 'mathlib4-dependent-issues-bot', 'peabrainiac'] |
nobody |
517-67865 1 year ago |
524-32382 524 days ago |
39-21495 39 days |
| 21610 |
JLimperg author:JLimperg |
Aesop forward benchmark: forward precomp |
Not a real PR, just for benchmarking.
|
merge-conflict |
30/27 |
Mathlib/Data/List/InsertIdx.lean,Mathlib/Tactic/Recall.lean,Mathlib/Topology/List.lean,Test.lean,lake-manifest.json,lakefile.lean,lean-toolchain |
7 |
3 |
['JLimperg', 'github-actions', 'leanprover-bot'] |
nobody |
517-17356 1 year ago |
unknown |
0-0 0 seconds |
| 21611 |
JLimperg author:JLimperg |
Aesop forward benchmark: master no-precomp |
Not a real PR, just for benchmarking. |
merge-conflict |
30/27 |
Mathlib/Data/List/InsertIdx.lean,Mathlib/Tactic/Recall.lean,Mathlib/Topology/List.lean,Test.lean,lake-manifest.json,lakefile.lean,lean-toolchain |
7 |
4 |
['JLimperg', 'github-actions', 'leanprover-bot'] |
nobody |
517-17355 1 year ago |
unknown |
0-0 0 seconds |
| 21612 |
JLimperg author:JLimperg |
Aesop forward benchmark: master precomp |
Not a real PR, just for benchmarking. |
merge-conflict |
30/27 |
Mathlib/Data/List/InsertIdx.lean,Mathlib/Tactic/Recall.lean,Mathlib/Topology/List.lean,Test.lean,lake-manifest.json,lakefile.lean,lean-toolchain |
7 |
3 |
['JLimperg', 'github-actions', 'leanprover-bot'] |
nobody |
517-17354 1 year ago |
unknown |
0-0 0 seconds |
| 10678 |
adri326 author:adri326 |
feat(Topology/UniformSpace): prove that a uniform space is completely regular |
Provides the pseudometric definition of a uniform space (for any open set `s` and `x ∈ s`, there exists a finite family of pseudometric spaces on `X` and an `ε > 0`, such that the intersection of the balls of these pseudometric spaces is a subset of `s`),
and uses it to prove that `UniformSpace X` implies `CompletelyRegularSpace X`.
---
This PR aims to close the gap of pi-base's theorem [T345](https://topology.pi-base.org/theorems/T000345), which says that topological groups are completely regular. We already have a proof that topological groups are uniform, but it turns out that we do not have any connection between `UniformSpace X` and `CompletelyRegularSpace X`.
There is an equivalence between `UniformSpace X` and `CompletelyRegularSpace X`: the former implies the latter, and the latter implies *the existence of* the former. This PR provides the first half of this equivalence.
The construction of the pseudometric definition is based on N. Bourbaki, Chapter 9, Theorem 4.1
The proof that a uniform space is completely regular is based on [the outline on mathexchange](https://math.stackexchange.com/questions/494718/how-to-prove-that-every-uniform-space-is-completely-regular).
I tried to outline the major steps of the different proofs inside of comments; I can happily be more verbose to clear up any confusion.
See [the corresponding Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Some.20missing.2C.20accessible.2C.20topology.20results) for more context.
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|
merge-conflict
awaiting-author
t-topology
|
332/0 |
Mathlib.lean,Mathlib/Topology/UniformSpace/Basic.lean,Mathlib/Topology/UniformSpace/CompletelyRegular.lean |
3 |
6 |
['ADedecker', 'adri326'] |
ADedecker assignee:ADedecker |
516-79282 1 year ago |
858-16561 858 days ago |
17-44804 17 days |
| 18785 |
erdOne author:erdOne |
feat(CategoryTheory): command that generates instances for `MorphismProperty` |
Co-authored-by: Calle Sönne
---
<!-- The text above the `---` will become the commit message when your
PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-category-theory
t-meta
|
369/0 |
Mathlib.lean,Mathlib/CategoryTheory/MorphismProperty/Tactic.lean,MathlibTest/AddMorphismPropertyInstances.lean,scripts/noshake.json |
4 |
19 |
['alexjbest', 'chrisflav', 'erdOne', 'github-actions', 'grunweg', 'jcommelin', 'joelriou'] |
nobody |
515-9392 1 year ago |
536-37662 536 days ago |
52-4682 52 days |
| 16311 |
madvorak author:madvorak |
feat(Computability): regular languages are context-free |
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-computability
|
72/0 |
Mathlib.lean,Mathlib/Computability/Chomsky.lean,Mathlib/Computability/ContextFreeGrammar.lean |
3 |
7 |
['Rida-Hamadani', 'YaelDillies', 'github-actions', 'madvorak'] |
nobody |
513-15811 1 year ago |
unknown |
0-0 0 seconds |
| 19943 |
AlexLoitzl author:AlexLoitzl |
feat(Computability): Add Chomsky Normal Form Grammar and translation |
- Define Chomsky normal form grammars
- Add language-preserving translation between context-free grammars and Chomsky normal form grammars
Co-authored-by: Martin Dvorak martin.dvorak@matfyz.cz
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-computability
awaiting-author
new-contributor
|
3151/0 |
Mathlib.lean,Mathlib/Computability/ChomskyNormalForm/Basic.lean,Mathlib/Computability/ChomskyNormalForm/EmptyElimination.lean,Mathlib/Computability/ChomskyNormalForm/LengthRestriction.lean,Mathlib/Computability/ChomskyNormalForm/TerminalRestriction.lean,Mathlib/Computability/ChomskyNormalForm/Translation.lean,Mathlib/Computability/ChomskyNormalForm/UnitElimination.lean,Mathlib/Computability/ContextFreeGrammar.lean |
8 |
59 |
['AlexLoitzl', 'YaelDillies', 'github-actions', 'kim-em', 'madvorak'] |
nobody |
513-15564 1 year ago |
520-27186 520 days ago |
37-29014 37 days |
| 21501 |
sksgurdldi author:sksgurdldi |
feat(List): add sum_zipWith_eq_finset_sum |
### **Description:**
This PR adds the lemma `List.sum_zipWith_eq_finset_sum` to `Mathlib.Algebra.BigOperators.Group.Finset.Basic`.
#### **Statement:**
The sum of the `zipWith` operation on two lists equals the sum of applying the operation to corresponding elements of the two lists, indexed over the minimum of their lengths.
#### **Formal Statement:**
```lean
lemma sum_zipWith_eq_finset_sum [Inhabited α] [Inhabited β] [AddCommMonoid γ]
{op : α → β → γ}
(l : List α) (m : List β) :
(List.zipWith op l m).sum =
∑ x ∈ (Finset.range (Nat.min l.length m.length)), op (l[x]!) (m[x]!)
```
#### **Remarks:**
- This lemma provides a useful equivalence between `List.zipWith` and summation over a `Finset.range` indexed by `Nat.min l.length m.length`.
- It can be helpful in algebraic manipulations involving list-based summations.
#### **Dependencies:**
No additional dependencies.
---
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|
awaiting-author
t-algebra
new-contributor
label:t-algebra$ |
43/0 |
Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean |
1 |
1 |
['github-actions', 'j-loreaux'] |
nobody |
507-70735 1 year ago |
507-70735 507 days ago |
13-33168 13 days |
| 12054 |
adomani author:adomani |
feat: auto-bugs |
This PR introduces a linter for suggesting bugs in tactics.
See
* #12077
* #12083
* #12084
for some bugs exposed by the test suite.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-meta
|
737/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/MetaTesting.lean,scripts/noshake.json,test/MetaTesting.lean |
5 |
20 |
['adomani', 'eric-wieser', 'github-actions', 'joneugster', 'kim-em'] |
joneugster assignee:joneugster |
507-58392 1 year ago |
720-30410 720 days ago |
45-6051 45 days |
| 5062 |
adomani author:adomani |
feat(Tactic/Prune + test/Prune): add `prune` tactic, for removing unnecessary hypotheses |
This tactic removes very conservatively all local declarations that
1. do not appear in the main goal,
2. do not appear in a declaration that appears in the main goal,
3. ... and so on recursively.
The main motivation for this tactic is that all available variables in the current `namespace/section` appear in the goal state, not just the ones that are needed for the statement to type-check. Using `prune` mitigates this situation.
The tactic also admits an optional natural number argument: `prune n` removes all variables that have not appeared at the `(n+1)`-st stage in the above list. Thus, `prune 0` only leaves the variables needed for the statement to type-check. Also, for sufficiently large `n`, `prune n` is a synonym for `prune`.
[Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/substitute.20for.20.60include.2Fomit.60.3F)
---
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|
merge-conflict
modifies-tactic-syntax
awaiting-author
t-meta
|
181/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Prune.lean,test/Prune.lean |
4 |
5 |
['adomani', 'j-loreaux', 'kmill'] |
nobody |
507-25699 1 year ago |
928-11030 928 days ago |
195-57118 195 days |
| 22169 |
JLimperg author:JLimperg |
Aesop forward benchmark: forward no-precomp naive |
Not a real PR, just for benchmarking. |
merge-conflict |
31/27 |
Mathlib/Data/List/InsertIdx.lean,Mathlib/Tactic/Recall.lean,Mathlib/Topology/List.lean,Test.lean,lake-manifest.json,lakefile.lean,lean-toolchain |
7 |
6 |
['JLimperg', 'github-actions', 'leanprover-bot'] |
nobody |
505-77763 1 year ago |
unknown |
0-0 0 seconds |
| 21433 |
grunweg author:grunweg |
chore: change more lemmas to be about enorm instead of nnnorm |
---
- [x] depends on: #21782
- [x] depends on: #21783 (and this PR modifies the file split, and file splits are painful to merge over)
<!-- The text above the `---` will become the commit message when your
PR is merged. Please leave a blank newline before the `---`, otherwise
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|
merge-conflict
awaiting-author
carleson
t-measure-probability
|
172/71 |
Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/ContinuousFunctions.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean |
9 |
18 |
['RemyDegenne', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib4-dependent-issues-bot'] |
nobody |
505-76952 1 year ago |
512-73017 512 days ago |
2-38007 2 days |
| 22171 |
JLimperg author:JLimperg |
Aesop forward benchmark: forward no-precomp naive rpinf pr-release |
Not a real PR, just for benchmarking. |
merge-conflict |
31/27 |
Mathlib/Data/List/InsertIdx.lean,Mathlib/Tactic/Recall.lean,Mathlib/Topology/List.lean,Test.lean,lake-manifest.json,lakefile.lean,lean-toolchain |
7 |
5 |
['JLimperg', 'github-actions', 'leanprover-bot'] |
nobody |
504-85636 1 year ago |
unknown |
0-0 0 seconds |
| 20454 |
urkud author:urkud |
chore(TangentCone): review names |
Also add some `@[simp]` attrs.
---
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|
merge-conflict
t-analysis
|
201/139 |
Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/Deriv/Abs.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Equiv.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Calculus/FDeriv/RestrictScalars.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Lemmas.lean,Mathlib/Analysis/Calculus/MeanValue.lean,Mathlib/Analysis/Calculus/TangentCone.lean,Mathlib/Analysis/Calculus/Taylor.lean,Mathlib/Analysis/Calculus/VectorField.lean,Mathlib/Analysis/Convex/SpecificFunctions/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/InverseDeriv.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/MFDeriv/UniqueDifferential.lean,Mathlib/Geometry/Manifold/VectorBundle/Tangent.lean,Mathlib/MeasureTheory/Integral/FundThmCalculus.lean |
25 |
3 |
['github-actions', 'sgouezel', 'urkud'] |
nobody |
501-37132 1 year ago |
550-76895 550 days ago |
4-8272 4 days |
| 21608 |
JLimperg author:JLimperg |
Aesop forward benchmark: forward no-precomp rpinf pr-release |
Not a real PR, just for benchmarking. |
merge-conflict |
38/29 |
Mathlib/Data/List/InsertIdx.lean,Mathlib/Data/Nat/Prime/Defs.lean,Mathlib/Tactic/Recall.lean,Mathlib/Topology/List.lean,Test.lean,lake-manifest.json,lakefile.lean,lean-toolchain |
8 |
13 |
['JLimperg', 'github-actions', 'leanprover-bot'] |
nobody |
501-11865 1 year ago |
unknown |
0-0 0 seconds |
| 21609 |
JLimperg author:JLimperg |
Aesop forward benchmark: forward no-precomp |
Not a real PR, just for benchmarking. |
merge-conflict |
38/29 |
Mathlib/Data/List/InsertIdx.lean,Mathlib/Data/Nat/Prime/Defs.lean,Mathlib/Tactic/Recall.lean,Mathlib/Topology/List.lean,Test.lean,lake-manifest.json,lakefile.lean,lean-toolchain |
8 |
13 |
['JLimperg', 'github-actions', 'leanprover-bot'] |
nobody |
501-10229 1 year ago |
unknown |
0-0 0 seconds |
| 16550 |
awainverse author:awainverse |
feat(ModelTheory): A typeclass for languages expanding other languages |
Defines `L.Expands L'` to consist of a privileged injective inclusion, `L'.Inclusion L`, from `L'` to `L`, corresponding to one language being a subset of the other in set-theoretic foundations.
Replaces `L.IsOrdered` with `L.Expands Language.order` and `L.OrderLHom` with `Language.order.Inclusion L`
Redefines `leSymb` in terms of `Language.order.Inclusion L`
Deletions:
- `FirstOrder.Language.IsOrdered`
- `FirstOrder.Language.OrderLHom`
- `instance : IsOrdered Language.order`
- `sum.instIsOrdered`
---
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|
merge-conflict
awaiting-author
t-logic
|
97/43 |
Mathlib/ModelTheory/LanguageMap.lean,Mathlib/ModelTheory/Order.lean |
2 |
9 |
['YaelDillies', 'awainverse', 'github-actions'] |
nobody |
500-76000 1 year ago |
673-20831 673 days ago |
0-61590 17 hours |
| 10823 |
alexkeizer author:alexkeizer |
feat: convert curried type functions into uncurried type functions |
Adds a conversion `TypeFun.ofCurried : CurriedTypeFun.{u, v} n -> TypeFun.{u, v} n`,
where `CurriedTypeFun.{u,v} n` is a (def-eq) abbreviation for `Type u -> ... -> Type u -> Type v`, i.e., the type of *curried* functions taking `n` arguments of type `Type u` to return an element of `Type v`, and
`TypeFun.{u, v} n` is an abbreviation for `TypeVec.{u} n -> Type v`.
It is generally more idiomatic to define type functions with multiple arguments in the curried style, but in the QPF development we use the uncurried equivalent `TypeVec n -> Type _`. Thus, having a canonical conversion from curried functions to uncurried gives us a canonical way to ask if a curried type function, say `Sum` is a QPF (namely, "is there an instance of `MvQPF (TypeFun.ofCurried Sum)`").
---
This is code ported from https://github.com/alexkeizer/QpfTypes, where this conversion is crucial in presenting a high-level interface, in terms of idiomatic, curried, type functions to users, while being built on QPFs (and thus, uncurried typefunctions) underneath.
There is also a conversion in the other direction, from uncurried to curried, which I've decided to PR later, to keep this PR smaller and hopefully easier to review.
- [x] depends on: #10818 (all changes to `Fin2.lean` are part of 10818, not the current PR)
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merge-conflict
awaiting-author
t-data
|
66/0 |
Mathlib.lean,Mathlib/Data/TypeFun.lean |
2 |
9 |
['YaelDillies', 'alexkeizer', 'github-actions'] |
nobody |
498-2193 1 year ago |
748-73193 748 days ago |
15-9013 15 days |
| 13648 |
urkud author:urkud |
feat(Topology/Module): generalize `ContinuousLinearMap.compSL` |
Generalize `ContinuousLinearMap.compSL` to topological vector spaces.
---
- [ ] depends on: #15217
This PR is not polished yet, but the main statement is there.
@ADedecker This answers a question I asked you on Zulip a few months ago.
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[](https://gitpod.io/from-referrer/)
|
t-algebra
merge-conflict
awaiting-author
t-topology
t-analysis
label:t-algebra$ |
23/18 |
Mathlib/Analysis/NormedSpace/OperatorNorm/Bilinear.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean |
2 |
5 |
['fpvandoorn', 'github-actions', 'mathlib4-dependent-issues-bot', 'urkud'] |
nobody |
496-25283 1 year ago |
734-8210 734 days ago |
28-69042 28 days |
| 19372 |
Command-Master author:Command-Master |
find defeq abuse using diagnostics |
---
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[](https://gitpod.io/from-referrer/)
- [ ] depends on: #19177 |
merge-conflict
blocked-by-other-PR
large-import
|
169/1 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/FindDefEqAbuse.lean,MathlibTest/FindDefEqAbuse.lean,lakefile.lean |
6 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
496-24783 1 year ago |
unknown |
0-0 0 seconds |
| 22408 |
JLimperg author:JLimperg |
Aesop forward bench: precomp only rpinf |
---
Not a real PR (yet), just for benchmarking.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
dependency-bump
|
5/3 |
lake-manifest.json,lakefile.lean,scripts/bench/fake-root/lib/lean/libleanshared.so,scripts/bench/run |
4 |
6 |
['JLimperg', 'github-actions', 'leanprover-bot'] |
nobody |
496-13687 1 year ago |
unknown |
0-0 0 seconds |
| 20636 |
eric-wieser author:eric-wieser |
feat: multiplication of intervals in rings |
---
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[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-algebra
label:t-algebra$ |
36/1 |
Mathlib/Algebra/Order/Interval/Basic.lean |
1 |
16 |
['Timeroot', 'YaelDillies', 'eric-wieser', 'github-actions'] |
nobody |
494-83652 1 year ago |
531-1029 531 days ago |
17-17852 17 days |
| 22340 |
sinhp author:sinhp |
feat(CategoryTheory): Locally Cartesian Closed Categories (Beck-Chevalley Conditions) |
Building on top of the API of `ExponentiableMorphism` in #22321, we state and prove Beck-Chevalley conditions. This will be crucial for our development of polynomial functors along exponentiable morphisms.
Co-authored-by: Emily Riehl <eriehl@jhu.edu>
---
- [ ] depends on: #22321
- [ ] depends on: #22319
- [ ] depends on: #21525
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[](https://gitpod.io/from-referrer/)
|
WIP
blocked-by-other-PR
t-category-theory
large-import
merge-conflict
|
1144/24 |
Mathlib.lean,Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Comma/Over/Sections.lean,Mathlib/CategoryTheory/Galois/Examples.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/Basic.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/BeckChevalley.lean,docs/references.bib |
8 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
494-13834 1 year ago |
500-82161 500 days ago |
0-17 17 seconds |
| 21959 |
BGuillemet author:BGuillemet |
feat(Topology/ContinuousMap): Stone-Weierstrass theorem for MvPolynomial |
Add the subalgebra of multivariate polynomials and prove it separates points, on the same model as `ContinuousMap/Polynomial.lean`.
Prove the Stone-Weierstrass theorem and some variations for multivariate polynomials.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-topology
new-contributor
|
285/1 |
Mathlib.lean,Mathlib/Topology/ContinuousMap/MvPolynomial.lean,Mathlib/Topology/ContinuousMap/StoneWeierstrass.lean |
3 |
1 |
['github-actions'] |
nobody |
494-10176 1 year ago |
494-10176 494 days ago |
16-76141 16 days |
| 19177 |
adomani author:adomani |
test: the findDefEqAbuse linter |
This is a prototype, as per [this Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Locating.20defeq.20abuse)
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
large-import
|
126/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/FindDefEqAbuse.lean,MathlibTest/FindDefEqAbuse.lean |
5 |
1 |
['github-actions'] |
nobody |
492-12189 1 year ago |
unknown |
0-0 0 seconds |
| 22359 |
adomani author:adomani |
feat(whitespace): do not allow indented doc-strings |
In a doc-string, Do not allow the first character after the first line break to be a space.
---
There are approximately 2.5k exceptions. I think that they should be unindented, judging from the sample that I looked at, but won't act on it, unless there is a clear plan to fix and merge this modification!
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-linter
large-import
|
222/70 |
Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Mathlib.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/AlgebraicTopology/SimplicialSet/NerveAdjunction.lean,Mathlib/Analysis/Asymptotics/ExpGrowth.lean,Mathlib/Data/Matroid/Circuit.lean,Mathlib/Init.lean,Mathlib/Lean/Meta/RefinedDiscrTree/Encode.lean,Mathlib/LinearAlgebra/Dimension/StrongRankCondition.lean,Mathlib/LinearAlgebra/LinearIndependent/Basic.lean,Mathlib/LinearAlgebra/LinearIndependent/Defs.lean,Mathlib/Tactic.lean,Mathlib/Tactic/FunProp/Decl.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/DocString.lean,Mathlib/Topology/Path.lean,Mathlib/Topology/UnitInterval.lean,MathlibTest/LintDocstring.lean,lakefile.lean |
20 |
1 |
['github-actions'] |
nobody |
492-11108 1 year ago |
500-37181 500 days ago |
0-2590 43 minutes |
| 18470 |
astrainfinita author:astrainfinita |
perf: lower the priority of `Normed*.to*` instances |
---
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From #7873.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
slow-typeclass-synthesis
t-algebra
t-analysis
label:t-algebra$ |
28/0 |
Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean |
2 |
9 |
['astrainfinita', 'github-actions', 'jcommelin', 'leanprover-bot'] |
nobody |
489-68003 1 year ago |
489-68003 489 days ago |
129-16341 129 days |
| 17368 |
Felix-Weilacher author:Felix-Weilacher |
feat(Topology/Baire/BaireMeasurable): add the Kuratowski-Ulam theorem |
Add the Kuratowski-Ulam theorem, which one can think of as a "Fubini" for Baire category.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-topology
|
187/1 |
Mathlib/MeasureTheory/MeasurableSpace/Basic.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Topology/Baire/BaireMeasurable.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/GDelta/Basic.lean |
5 |
6 |
['Felix-Weilacher', 'github-actions', 'urkud'] |
nobody |
488-5672 1 year ago |
625-17191 625 days ago |
22-48725 22 days |
| 8767 |
eric-wieser author:eric-wieser |
refactor(Cache): tidy lake-manifest parsing in Cache |
This now respects local copies of Mathlib dependencies (though in practice these invalidate the *online* cache because to point to local copies of Mathlib, the hash for `lakefile.lean` and `lake-manifest.json` is first invalidated).
---
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- [x] depends on: #11492
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-meta
|
49/49 |
Cache/Hashing.lean,Cache/IO.lean,lake-manifest.json |
3 |
8 |
['digama0', 'eric-wieser', 'github-actions'] |
nobody |
486-67735 1 year ago |
668-33685 668 days ago |
119-35643 119 days |
| 22434 |
qawbecrdtey author:qawbecrdtey |
feat(Mathlib/Analysis/Normed/Lp/WithLp): Added more instances for `WithLp` |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
awaiting-author
t-analysis
|
51/22 |
Mathlib/Analysis/Normed/Lp/WithLp.lean |
1 |
11 |
['eric-wieser', 'github-actions', 'leanprover-bot', 'qawbecrdtey'] |
nobody |
486-10774 1 year ago |
492-66439 492 days ago |
1-79072 1 day |
| 15578 |
znssong author:znssong |
feat(Function): Fixed points of function `f` with `f(x) >= x` |
We added some lemmas of fixed points of function `f` with `f(x) >= x`, where `f : α → α` is a function on a finite type `α`. This will be needed in proof of Bondy-Chvátal theorem.
---
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See also branch `meow-sister/BondyChvatal`.
[](https://gitpod.io/from-referrer/) |
merge-conflict
awaiting-author
t-analysis
new-contributor
|
82/0 |
Mathlib.lean,Mathlib/Dynamics/FixedPoints/Basic.lean,Mathlib/Dynamics/FixedPoints/Increasing.lean |
3 |
32 |
['Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'urkud', 'vihdzp', 'znssong'] |
nobody |
486-6002 1 year ago |
669-9231 669 days ago |
29-48368 29 days |
| 22660 |
Ruben-VandeVelde author:Ruben-VandeVelde |
chore: follow naming convention around Group.IsNilpotent |
---
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- Nat.bit1_add_bit1
- ...
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|
merge-conflict
t-algebra
label:t-algebra$ |
133/67 |
Mathlib/GroupTheory/Frattini.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/SpecificGroups/ZGroup.lean |
3 |
1 |
['github-actions'] |
nobody |
482-32431 1 year ago |
482-32431 482 days ago |
10-48025 10 days |
| 13999 |
adomani author:adomani |
feat: a linter to flag potential confusing conventions |
Currently, the linter flags all uses of
* `a - b` where `a b : Nat`;
* `a / b` where `a b : Nat` or `a b : Int`;
* `a / 0` more or less whenever the type of `a` has a `0` and a division.
This comes up often when starting to use Lean and hopefully the flag can help mitigate initial confusions.
When the local context contains the relevant inequality/divisibility hypothesis, the linter is quiet.
A recent [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/113489-new-members/topic/not.20understanding.20deliberate.20error.20with.20.60ring.60.20over.20.E2.84.95/near/445879310)
---
To make sure that the linter does not produce errors, #14007 activates the linter on "all" of mathlib. The expectation is that no error is thrown, just warnings.
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|
merge-conflict
t-linter
awaiting-author
|
251/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/Papercut.lean,MathlibTest/Papercut.lean |
4 |
24 |
['Julian', 'YaelDillies', 'adomani', 'eric-wieser', 'github-actions'] |
nobody |
481-64465 1 year ago |
742-41956 742 days ago |
7-47589 7 days |
| 19013 |
quangvdao author:quangvdao |
feat(Algebra/BigOperators/Fin): Add `finSigmaFinEquiv` |
This PR adds `finSigmaFinEquiv` which is the equivalence `(i : Fin m) × Fin (n i) ≃ Fin (∑ i, n i)`. This is the dependent version of `finProdFinEquiv`.
CI should be passing, but there are two things I'd like feedback on:
1. When defining the mappings, I have to consider `m = 0` separately. Is there a more uniform definition?
2. I'm proving this as a step toward defining `Fin.join`, which is the analogue of `List.join`. I can now technically define `Fin.join` as:
```
variable {a : Fin n → ℕ} {α : (i : Fin n) → (j : Fin (a i)) → Sort*}
def join (v : (i : Fin n) → (j : Fin (a i)) → α i j) (k : Fin (∑ i, a i)) :
α (finSigmaFinEquiv.invFun k).1 (finSigmaFinEquiv.invFun k).2 :=
v (finSigmaFinEquiv.invFun k).1 (finSigmaFinEquiv.invFun k).2
```
but this looks horrible. This highly motivates refactoring `invFun` as two new definitions:
```
def func1 {n : ℕ} (a : Fin n → ℕ) (k : Fin (∑ i, a i)) : Fin n := sorry
def func2 {n : ℕ} (a : Fin n → ℕ) (k : Fin (∑ i, a i)) : Fin (a (func1 a k)) := sorry
```
I'm not sure what to call these functions. The analogues in the non-dependent case are `divNat` and `modNat`.
---
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|
merge-conflict
awaiting-author
t-algebra
label:t-algebra$ |
92/16 |
Mathlib/Algebra/BigOperators/Fin.lean |
1 |
14 |
['YaelDillies', 'eric-wieser', 'github-actions', 'quangvdao'] |
nobody |
480-98 1 year ago |
601-64426 601 days ago |
3-28829 3 days |
| 20389 |
eric-wieser author:eric-wieser |
feat: generalize results to `WithLp 0` |
---
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|
merge-conflict
t-analysis
|
116/53 |
Mathlib/Analysis/Normed/Lp/PiLp.lean |
1 |
1 |
['github-actions'] |
nobody |
478-75046 1 year ago |
unknown |
0-0 0 seconds |
| 19227 |
adomani author:adomani |
fix(CI): unwrap `lake test` in problem matcher |
... and also add a `#guard_msgs` in `AssertImported` test, so that `lake test` properly fails.
[Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/CI.3A.20noisy.20.22test.20mathlib.22/near/483126955)
---
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|
merge-conflict
awaiting-author
CI
|
9/20 |
.github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,MathlibTest/AssertImported.lean |
5 |
2 |
['bryangingechen', 'github-actions'] |
nobody |
477-19134 1 year ago |
577-59805 577 days ago |
22-71271 22 days |
| 16009 |
Command-Master author:Command-Master |
acyclic graph |
---
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|
merge-conflict
WIP
t-combinatorics
|
232/0 |
Mathlib/Combinatorics/SimpleGraph/Acyclic.lean |
1 |
1 |
['github-actions'] |
nobody |
471-11215 1 year ago |
unknown |
0-0 0 seconds |
| 20222 |
eric-wieser author:eric-wieser |
feat: generalize lemmas about derivatives |
Rather than creating a huge diff by shuffling things around, this generalizes everything in-place and swaps between `section`s for topological and normed vector spaces.
The rationale for this approach is that:
* we may further generalize the results of this file, and this avoids us jumbling up the order multiple times unnecessarily.
* this greatly reduces the chance of merge conflicts
---
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- [ ] depends on: #21065
[](https://gitpod.io/from-referrer/)
|
merge-conflict
blocked-by-other-PR
t-analysis
|
554/50 |
Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,MathlibTest/Recall.lean |
3 |
8 |
['adomani', 'eric-wieser', 'github-actions', 'leanprover-bot', 'mathlib4-dependent-issues-bot'] |
nobody |
468-33334 1 year ago |
531-46576 531 days ago |
7-27731 7 days |
| 21018 |
markimunro author:markimunro |
feat(Data/Matrix): add file with key definitions and theorems about elementary row operations |
Prove that each elementary row operation is equivalent to a multiplication by an elementary matrix, has another row operation which inverts it, and that each elementary matrix has a left inverse.
This is a very large PR and I understand it will take time. This is my first one and will likely have issues but I will be ready to answer questions/fix them as soon as possible.
Co-authored-by: Christopher Lynch <clynch@clarkson.edu>
---
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|
t-data
enhancement
new-contributor
merge-conflict
awaiting-author
|
1230/0 |
Mathlib.lean,Mathlib/Data/Matrix/ElementaryRowOperations.lean,Mathlib/Data/Matrix/GaussianElimination.lean,Mathlib/Data/Matrix/GaussianEliminationOld,Mathlib/Data/Matrix/oldnames,et --hard 18533caba32,lean-toolchain |
7 |
17 |
['chrisflav', 'eric-wieser', 'github-actions', 'j-loreaux', 'markimunro'] |
nobody |
467-41401 1 year ago |
492-70357 492 days ago |
23-22681 23 days |
| 23514 |
eric-wieser author:eric-wieser |
refactor: smooth over Lattice/LinearOrder inheritance |
This fixes the forgetful inheritance in `CompleteLinearOrder` and `ConditionallyCompleteLinearOrder`, which previously did not carry `compare` fields. (edit: moved to #23515)
The following is the inheritance diagram before, where the dotted lines are manual instances. Note that every lattice typeclass that extends `LinearOrder` has to implement another dotted line edge, and remember to copy all the necessary data fields.
```mermaid
graph TD
LinearOrder --> Min,Max;
LinearOrder --> PartialOrder;
Lattice --> PartialOrder;
CompleteLinearOrder --> Lattice;
ConditionallyCompleteLinearOrder --> Lattice;
LinearOrder-.-> Lattice;
CompleteLinearOrder -.-> LinearOrder;
ConditionallyCompleteLinearOrder -.-> LinearOrder;
```
This change introduces two new auxiliary typeclasses, to encapsulate these troublesome edges. `LinearOrderedLattice` can be thought of as `LinearOrder`, but with `sup`/`inf` instead of `min`/`max`. This is crucial, because it ensures the duplicate fields are merged in `extends CompleteLattice X, LinearOrderedLattice X`, which would not be the case for `extends CompleteLattice X, LinearOrder X`. The result is:
```mermaid
graph TD
LinearOrder --> Min,Max;
LinearOrder --> LinearOrderBase;
LinearOrderBase --> PartialOrder;
Lattice --> PartialOrder;
LinearOrderedLattice -.-> LinearOrder;
LinearOrderedLattice --> LinearOrderBase;
LinearOrderedLattice --> Lattice;
CompleteLinearOrder --> LinearOrderedLattice;
ConditionallyCompleteLinearOrder --> LinearOrderedLattice;
```
---
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|
merge-conflict |
85/66 |
Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Order/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean,Mathlib/Order/Defs/LinearOrder.lean,Mathlib/Order/Lattice.lean |
7 |
2 |
['github-actions', 'mathlib4-dependent-issues-bot'] |
nobody |
466-67231 1 year ago |
467-72191 467 days ago |
0-151 2 minutes |
| 20746 |
JLimperg author:JLimperg |
Aesop forward branch test |
---
This is not a real PR; I just want to benchmark this Aesop branch.
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|
merge-conflict |
14/6 |
.github/workflows/build.yml,Mathlib/Data/Nat/Prime/Defs.lean,lake-manifest.json,lakefile.lean,scripts/bench/fake-root/lib/lean/libleanshared.so,scripts/bench/run |
6 |
11 |
['JLimperg', 'Kha', 'github-actions', 'leanprover-bot'] |
nobody |
466-24637 1 year ago |
unknown |
0-0 0 seconds |
| 22810 |
pechersky author:pechersky |
feat(Counterexamples): metric space not induced by norm |
Because the distance is not homogeneous
---
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- [x] depends on: #22845 |
merge-conflict
WIP
t-topology
t-analysis
|
202/1 |
Counterexamples.lean,Counterexamples/NotBoundedSMulMetricSpace.lean,Mathlib.lean,Mathlib/Analysis/Normed/PiNat.lean,Mathlib/Topology/Algebra/Module/LocallyConvex.lean,Mathlib/Topology/MetricSpace/Polish.lean |
6 |
21 |
['eric-wieser', 'github-actions', 'loefflerd', 'mathlib4-dependent-issues-bot', 'pechersky'] |
nobody |
466-17293 1 year ago |
481-50784 481 days ago |
0-82252 22 hours |
| 13124 |
astrainfinita author:astrainfinita |
chore: remove `CovariantClass` and `ContravariantClass` |
Lean cannot handle `CovariantClass` and `ContravariantClass` correctly
- TC slowness
- [Zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/TC.20slowness)
- https://github.com/leanprover-community/mathlib4/issues/6646#issuecomment-1691792488
- It may also have made #6326 fail.
- Needs a weird hack to find instance: #9252
---
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|
merge-conflict
WIP
|
602/486 |
Mathlib/Algebra/AddConstMap/Basic.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/Group/Subgroup/Pointwise.lean,Mathlib/Algebra/Group/Submonoid/Pointwise.lean,Mathlib/Algebra/Group/UniqueProds/Basic.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/AddTorsor.lean,Mathlib/Algebra/Order/Group/Action.lean,Mathlib/Algebra/Order/Group/DenselyOrdered.lean,Mathlib/Algebra/Order/Group/Units.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean,Mathlib/Algebra/Order/GroupWithZero/WithZero.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/OrderDual.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Algebra/Ring/Subring/Pointwise.lean,Mathlib/Algebra/Ring/Subsemiring/Pointwise.lean,Mathlib/Analysis/SumOverResidueClass.lean,Mathlib/Data/DFinsupp/Lex.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/GroupTheory/OrderOfElement.lean,Mathlib/Order/Filter/IsBounded.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/RingTheory/Ideal/Pointwise.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/Topology/Algebra/Order/LiminfLimsup.lean |
37 |
6 |
['MichaelStollBayreuth', 'astrainfinita', 'github-actions', 'leanprover-bot', 'mathlib4-dependent-issues-bot'] |
nobody |
465-45270 1 year ago |
unknown |
0-0 0 seconds |
| 15212 |
victorliu5296 author:victorliu5296 |
feat: Add fundamental theorem of calculus-2 for Banach spaces |
add the Mean Value Theorem for Banach spaces to the library and include reference for the theorem statement
This theorem states that if `f : X → Y` is differentiable along the line segment from `a` to `b`, then the change in `f` equals the integral of its derivative along this path. This extends the mean value theorem to Banach spaces. This can be used for the eventual proof of the Newton-Kantorovich theorem with 1 constant contained inside the added reference.
Here is the discussion on Zulipchat: https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Contributing.20FTC-2.20for.20Banach.20spaces |
t-measure-probability
new-contributor
merge-conflict
awaiting-author
t-analysis
|
60/1 |
Mathlib/MeasureTheory/Integral/FundThmCalculus.lean |
1 |
3 |
['github-actions', 'hrmacbeth', 'victorliu5296'] |
nobody |
462-36390 1 year ago |
656-13761 656 days ago |
51-85104 51 days |
| 22888 |
plp127 author:plp127 |
perf: replace `Lean.Expr.swapBVars` with a better? implementation |
Replaces `Lean.Expr.swapBVars` with a version that traverses the expression.
---
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PR is merged. Please leave a blank newline before the `---`, otherwise
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[](https://gitpod.io/from-referrer/)
|
awaiting-author
t-meta
|
14/12 |
Mathlib/Tactic/FunProp/ToBatteries.lean |
1 |
23 |
['eric-wieser', 'github-actions', 'joneugster', 'leanprover-bot', 'plp127'] |
eric-wieser and joneugster assignee:eric-wieser assignee:joneugster |
461-29435 1 year ago |
481-79275 481 days ago |
4-80306 4 days |
| 15943 |
urkud author:urkud |
feat: add `ProdQuotientMapSpace` |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-topology
|
731/11 |
Mathlib.lean,Mathlib/Topology/Basic.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/Maps/ProdQuotient.lean |
4 |
2 |
['github-actions', 'leanprover-community-bot-assistant'] |
nobody |
460-54762 1 year ago |
unknown |
0-0 0 seconds |
| 22579 |
kvanvels author:kvanvels |
doc(Topology/Defs/Induced): fix comments on three functions related to RestrictGenTopology |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-topology
documentation
awaiting-author
|
10/9 |
Mathlib/Topology/Defs/Induced.lean,Mathlib/Topology/RestrictGen.lean |
2 |
4 |
['github-actions', 'kvanvels', 'leanprover-community-bot-assistant', 'urkud'] |
nobody |
459-43293 1 year ago |
482-47670 482 days ago |
12-18679 12 days |
| 19771 |
robertylewis author:robertylewis |
perf: qqify two functions in linarith |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-meta
|
17/24 |
Mathlib/Tactic/Linarith/Frontend.lean,Mathlib/Tactic/Linarith/Verification.lean |
2 |
5 |
['github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-bot-assistant', 'robertylewis'] |
nobody |
459-22799 1 year ago |
unknown |
0-0 0 seconds |
| 22308 |
plp127 author:plp127 |
feat (Analysis/Convex): Generalize `Convex` lemmas to `StarConvex` |
This PR generalizes many lemmas assuming `Convex 𝕜 s` to assume `StarConvex 𝕜 0 s`.
---
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- [x] depends on: #22421
[](https://gitpod.io/from-referrer/)
|
merge-conflict
WIP
t-analysis
new-contributor
|
30/18 |
Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Convex/GaugeRescale.lean,Mathlib/Analysis/Convex/Star.lean,Mathlib/Analysis/LocallyConvex/AbsConvexOpen.lean |
4 |
5 |
['Paul-Lez', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] |
nobody |
459-22310 1 year ago |
unknown |
0-0 0 seconds |
| 21488 |
imbrem author:imbrem |
feat(CategoryTheory/Monoidal): premonoidal categories |
Add support for premonoidal categories
---
Still want to add support for:
- Premonoidal braided/symmetric categories
- The monoidal coherence theorem, which I've already ported in my `discretion` library
- The `coherence` tactic, which should work fine for premonoidal categories too
but wanted to get this in front of reviewers ASAP to make sure my general approach was alright
<!-- The text above the `---` will become the commit message when your
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-category-theory
new-contributor
|
900/361 |
Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/CategoryTheory/Bicategory/End.lean,Mathlib/CategoryTheory/GradedObject/Monoidal.lean,Mathlib/CategoryTheory/Localization/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Monoidal/CoherenceLemmas.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/CategoryTheory/Monoidal/End.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/MonoidalComp.lean,MathlibTest/StringDiagram.lean |
21 |
9 |
['YaelDillies', 'github-actions', 'grunweg', 'imbrem', 'kim-em', 'leanprover-community-bot-assistant'] |
nobody |
459-18578 1 year ago |
459-18579 459 days ago |
58-6028 58 days |
| 21525 |
sinhp author:sinhp |
feat(CategoryTheory): Locally Cartesian Closed Categories (Prelim) |
This PR defines the basic preliminaries for defining locally cartesian closed categories (LCCCs). In particular, using the calculus of mates we define certain natural isomorphisms involving `Over.star` and `Over.pullback` which will be crucial in defining the right adjoint to the pullback functor in the development of LCCCs.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-category-theory
large-import
|
338/24 |
Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Galois/Examples.lean |
3 |
13 |
['b-mehta', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'sinhp'] |
nobody |
459-18576 1 year ago |
459-18578 459 days ago |
36-69400 36 days |
| 22319 |
sinhp author:sinhp |
feat(CategoryTheory): Locally Cartesian Closed Categories (Sections Right Adjoint) |
we define the `Over.sections` functor in the file `CategoryTheory.Comma.Over.Sections` and prove that it is a right adjoint to the `Over.star`, thereby solving an existing TODO in `Over.pullback` file.
The `sections` functor is used to define the right adjoint to the pullback functor `Over.pullback` in the development of LCCCs. Moreover, the rest of added lemmas and theorems to `CategoryTheory.Comma.Over.Pullback` are crucial for the development of LCCCs in the next PR.
---
- [ ] depends on: #21525
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
blocked-by-other-PR
t-category-theory
large-import
|
547/24 |
Mathlib.lean,Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Comma/Over/Sections.lean,Mathlib/CategoryTheory/Galois/Examples.lean |
5 |
3 |
['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] |
nobody |
459-18049 1 year ago |
501-22084 501 days ago |
0-2084 34 minutes |
| 22321 |
sinhp author:sinhp |
feat(CategoryTheory): Locally Cartesian Closed Categories (Definition) |
This PR defines locally cartesian closed categories in terms of existence of the pushforward functors (right adjoint to the pullback functor) for all morphisms. We develop basic API and prove the following:
1. Existence of the pushforward functors is equivalent to cartesian closed slices.
2. Any locally cartesian closed category with a terminal object is cartesian closed.
3. The slices of a locally cartesian closed category are locally cartesian closed.
Some of the content is based on the project of formalization of polynomial functors at the Trimester "Prospect of Formal Mathematics" at the Hausdorff Institute (HIM) in Bonn. https://github.com/sinhp/Poly
I found this implementation of locally cartesian closed categories amenable to polynomial functors formalization.
Co-authored-by: Emily Riehl <eriehl@jhu.edu>
---
- [ ] depends on: #21525
- [ ] depends on: #22319
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
blocked-by-other-PR
t-category-theory
large-import
|
812/24 |
Mathlib.lean,Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Comma/Over/Sections.lean,Mathlib/CategoryTheory/Galois/Examples.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/Basic.lean |
6 |
3 |
['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] |
nobody |
459-18049 1 year ago |
501-20825 501 days ago |
0-336 5 minutes |
| 13653 |
adomani author:adomani |
feat: the unusedSetOptionIn linter |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-linter
large-import
|
199/0 |
Mathlib.lean,Mathlib/Algebra/Homology/HomotopyCategory/Triangulated.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/UnnecessarySetOptionIn.lean,MathlibTest/UnnecessarySetOptionIn.lean |
6 |
15 |
['adomani', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant'] |
nobody |
458-49414 1 year ago |
unknown |
0-0 0 seconds |
| 19425 |
hrmacbeth author:hrmacbeth |
perf: gcongr forward-reasoning adjustment |
This PR changes the "forward-reasoning" component of `gcongr`, rendering it more efficient, particularly in problems with a large number of variables/hypotheses in the context.
Previously `gcongr` attempted to match *every* `LocalDecl` against *every* node in the parse tree using *each* of the five implemented `@[gcongr_forward]` mini-tactics: matching directly, matching after applying `symm`, matching after applying `le_of_lt`, etc etc.
The new algorithm filters out the non-Prop `LocalDecl`s, and also adjusts the `@[gcongr_forward]` extensions so that, rather than re-apply the relevant lemmas (`symm`, `le_of_lt`, etc) at every node in the parse tree, the lemmas are applied in advance to the `LocalDecl`s and the result (if successful) stored.
The performance effect on mathlib as a whole is miniscule, but it speeds up the profiler's count of "tactic execution of Mathlib.Tactic.GCongr" in the newly-added test from 257 ms to 47 ms, and has a similar effect on real-life examples in an analysis project of mine.
Co-authored-by: Mario Carneiro <di.gama@gmail.com>
---
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[](https://gitpod.io/from-referrer/)
(Note that Mario provided the ideas but not the code, so please review with appropriate diligence!) |
merge-conflict
awaiting-author
|
130/59 |
Mathlib/Order/Lattice.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/GCongr/ForwardAttr.lean,MathlibTest/GCongr/inequalities.lean |
4 |
17 |
['Vierkantor', 'github-actions', 'hrmacbeth', 'leanprover-bot', 'leanprover-community-bot-assistant'] |
Vierkantor assignee:Vierkantor |
458-31110 1 year ago |
591-19527 591 days ago |
1-41769 1 day |
| 20873 |
vbeffara author:vbeffara |
feat(Topology/Covering): path lifting and homotopy lifting |
This proves the existence and uniqueness of path and homotopy lifts through covering maps.
---
I tried to separate as much of the proof as possible into separate PRs (which are already in Mathlib now), but the proof here relies on a monolithic construction of an explicit lift along a well-chosen subdivision, in `partial_lift`, with associated definitions. Only one standalone lean file added.
An older WIP PR #10084 by Junyan Xu @alreadydone proves similar results using a very similar construction for path lifting, with a different argument to obtain continuity for homotopy lifting.
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|
merge-conflict
awaiting-author
t-topology
new-contributor
|
281/1 |
Mathlib.lean,Mathlib/Topology/Covering/Basic.lean,Mathlib/Topology/Covering/Lift.lean |
3 |
9 |
['alreadydone', 'github-actions', 'grunweg', 'vbeffara'] |
nobody |
458-21306 1 year ago |
533-14101 533 days ago |
5-5613 5 days |
| 24040 |
astrainfinita author:astrainfinita |
refactor: unbundle algebra from `(NonUnital){Seminormed, Normed}(Comm)Ring` |
---
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|
t-algebra
blocked-by-other-PR
merge-conflict
slow-typeclass-synthesis
t-analysis
label:t-algebra$ |
3775/3674 |
Archive/Imo/Imo1998Q2.lean,Counterexamples/LinearOrderWithPosMulPosEqZero.lean,Mathlib/Algebra/Algebra/RestrictScalars.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Covolume.lean,Mathlib/Algebra/Order/Field/Canonical.lean,Mathlib/Algebra/Order/Field/Rat.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Nonneg/Field.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Ring/Nat.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/CPolynomial.lean,Mathlib/Analysis/Analytic/CPolynomialDef.lean,Mathlib/Analysis/Analytic/ChangeOrigin.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/Analytic/Linear.lean,Mathlib/Analysis/Analytic/OfScalars.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Analytic/Polynomial.lean,Mathlib/Analysis/Analytic/RadiusLiminf.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Analytic/Within.lean,Mathlib/Analysis/Asymptotics/AsymptoticEquivalent.lean,Mathlib/Analysis/Asymptotics/Defs.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/Asymptotics/Theta.lean,Mathlib/Analysis/BoundedVariation.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/DivergenceTheorem.lean,Mathlib/Analysis/BoxIntegral/Integrability.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Measure.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/Classes.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Integral.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Isometric.lean,Mathlib/Analysis/CStarAlgebra/ContinuousLinearMap.lean,Mathlib/Analysis/CStarAlgebra/ContinuousMap.lean,Mathlib/Analysis/CStarAlgebra/Exponential.lean,Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Defs.lean,Mathlib/Analysis/CStarAlgebra/Multiplier.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/CStarAlgebra/Unitization.lean,Mathlib/Analysis/CStarAlgebra/lpSpace.lean,Mathlib/Analysis/Calculus/AddTorsor/AffineMap.lean,Mathlib/Analysis/Calculus/AddTorsor/Coord.lean,Mathlib/Analysis/Calculus/BumpFunction/Basic.lean,Mathlib/Analysis/Calculus/BumpFunction/Convolution.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/BumpFunction/InnerProduct.lean,Mathlib/Analysis/Calculus/BumpFunction/Normed.lean,Mathlib/Analysis/Calculus/Conformal/InnerProduct.lean,Mathlib/Analysis/Calculus/Conformal/NormedSpace.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/ContDiff/CPolynomial.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/ContDiff/FiniteDimension.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Analysis/Calculus/ContDiff/WithLp.lean,Mathlib/Analysis/Calculus/DSlope.lean,Mathlib/Analysis/Calculus/Deriv/Abs.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/AffineMap.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Comp.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/Deriv/Inverse.lean,Mathlib/Analysis/Calculus/Deriv/Linear.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/Deriv/Prod.lean,Mathlib/Analysis/Calculus/Deriv/Shift.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/Deriv/Star.lean,Mathlib/Analysis/Calculus/Deriv/Support.lean,Mathlib/Analysis/Calculus/Deriv/ZPow.lean,Mathlib/Analysis/Calculus/DiffContOnCl.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Bilinear.lean |
630 |
5 |
['astrainfinita', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] |
nobody |
454-12009 1 year ago |
unknown |
0-0 0 seconds |
| 16314 |
astrainfinita author:astrainfinita |
chore(Data/Quot): deprecate `ind*'` APIs |
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|
merge-conflict
t-data
|
247/287 |
Counterexamples/CliffordAlgebraNotInjective.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean,Mathlib/CategoryTheory/ConnectedComponents.lean,Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/CategoryTheory/Subobject/FactorThru.lean,Mathlib/CategoryTheory/Subobject/Lattice.lean,Mathlib/Computability/Reduce.lean,Mathlib/Computability/Tape.lean,Mathlib/Data/List/Cycle.lean,Mathlib/Data/Multiset/MapFold.lean,Mathlib/Data/Multiset/ZeroCons.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/Data/Setoid/Partition.lean,Mathlib/FieldTheory/Fixed.lean,Mathlib/GroupTheory/Complement.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/Hom.lean,Mathlib/GroupTheory/Coset/Basic.lean,Mathlib/GroupTheory/Coset/Defs.lean,Mathlib/GroupTheory/FreeAbelianGroup.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/Index.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/PGroup.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean,Mathlib/GroupTheory/PresentedGroup.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/GroupTheory/SchurZassenhaus.lean,Mathlib/GroupTheory/Sylow.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/LinearAlgebra/Projectivization/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/LinearAlgebra/Quotient/Defs.lean,Mathlib/MeasureTheory/Function/AEEqFun.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/Order/Antisymmetrization.lean,Mathlib/Order/Category/PartOrd.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/RepresentationTheory/GroupCohomology/Hilbert90.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Functoriality.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Congruence/Basic.lean,Mathlib/RingTheory/Flat/FaithfullyFlat/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousLocalization.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/RingTheory/Ideal/Quotient/Defs.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Valuation/Quotient.lean,Mathlib/Topology/Algebra/Group/TopologicalAbelianization.lean,Mathlib/Topology/Algebra/InfiniteSum/Module.lean,Mathlib/Topology/Separation/Basic.lean |
65 |
4 |
['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] |
nobody |
453-43542 1 year ago |
453-43544 453 days ago |
55-52030 55 days |
| 23509 |
eric-wieser author:eric-wieser |
refactor: Make ENNReal an abbrev |
The `Coe` instance becomes `CoeTC` to match what we do for `WithTop` (such that the priority kicks in)
Probably we could have both copies and things would be ok.
---
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This includes part of #23750
|
merge-conflict
t-data
|
22/66 |
Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/ENNReal/BigOperators.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean,Mathlib/MeasureTheory/Measure/Sub.lean,Mathlib/MeasureTheory/Measure/TightNormed.lean,Mathlib/Topology/MetricSpace/PartitionOfUnity.lean |
7 |
22 |
['eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mattrobball', 'urkud'] |
nobody |
453-27195 1 year ago |
455-11945 455 days ago |
5-23483 5 days |
| 24060 |
eric-wieser author:eric-wieser |
chore(MeasureTheory): use `0` instead of `const _ 0` |
---
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|
merge-conflict
t-measure-probability
|
30/20 |
Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/MeasureTheory/Function/SimpleFuncDense.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Integral/Bochner/VitaliCaratheodory.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Countable.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean,Mathlib/Probability/StrongLaw.lean |
7 |
2 |
['github-actions', 'leanprover-community-bot-assistant'] |
nobody |
453-16890 1 year ago |
unknown |
0-0 0 seconds |
| 24058 |
astrainfinita author:astrainfinita |
refactor: unbundle algebra from `*NormedField` |
---
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|
t-algebra
blocked-by-other-PR
merge-conflict
slow-typeclass-synthesis
t-analysis
label:t-algebra$ |
4602/4346 |
Archive/Hairer.lean,Archive/Imo/Imo1998Q2.lean,Counterexamples/LinearOrderWithPosMulPosEqZero.lean,Mathlib/Algebra/Algebra/RestrictScalars.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Covolume.lean,Mathlib/Algebra/Order/Field/Canonical.lean,Mathlib/Algebra/Order/Field/Rat.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Nonneg/Field.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Ring/Nat.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/CPolynomial.lean,Mathlib/Analysis/Analytic/CPolynomialDef.lean,Mathlib/Analysis/Analytic/ChangeOrigin.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/Analytic/Linear.lean,Mathlib/Analysis/Analytic/OfScalars.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Analytic/Polynomial.lean,Mathlib/Analysis/Analytic/RadiusLiminf.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Analytic/Within.lean,Mathlib/Analysis/Asymptotics/AsymptoticEquivalent.lean,Mathlib/Analysis/Asymptotics/Defs.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/Asymptotics/SuperpolynomialDecay.lean,Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/Asymptotics/Theta.lean,Mathlib/Analysis/BoundedVariation.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/DivergenceTheorem.lean,Mathlib/Analysis/BoxIntegral/Integrability.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Measure.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/Classes.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Integral.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Isometric.lean,Mathlib/Analysis/CStarAlgebra/ContinuousLinearMap.lean,Mathlib/Analysis/CStarAlgebra/ContinuousMap.lean,Mathlib/Analysis/CStarAlgebra/Exponential.lean,Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Defs.lean,Mathlib/Analysis/CStarAlgebra/Multiplier.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/CStarAlgebra/Unitization.lean,Mathlib/Analysis/CStarAlgebra/lpSpace.lean,Mathlib/Analysis/Calculus/AddTorsor/AffineMap.lean,Mathlib/Analysis/Calculus/AddTorsor/Coord.lean,Mathlib/Analysis/Calculus/BumpFunction/Basic.lean,Mathlib/Analysis/Calculus/BumpFunction/Convolution.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/BumpFunction/InnerProduct.lean,Mathlib/Analysis/Calculus/BumpFunction/Normed.lean,Mathlib/Analysis/Calculus/Conformal/InnerProduct.lean,Mathlib/Analysis/Calculus/Conformal/NormedSpace.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/ContDiff/CPolynomial.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/ContDiff/FiniteDimension.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Analysis/Calculus/ContDiff/WithLp.lean,Mathlib/Analysis/Calculus/DSlope.lean,Mathlib/Analysis/Calculus/Deriv/Abs.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/AffineMap.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Comp.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/Deriv/Inverse.lean,Mathlib/Analysis/Calculus/Deriv/Linear.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/Deriv/Pi.lean,Mathlib/Analysis/Calculus/Deriv/Polynomial.lean,Mathlib/Analysis/Calculus/Deriv/Pow.lean,Mathlib/Analysis/Calculus/Deriv/Prod.lean,Mathlib/Analysis/Calculus/Deriv/Shift.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/Deriv/Star.lean,Mathlib/Analysis/Calculus/Deriv/Support.lean,Mathlib/Analysis/Calculus/Deriv/ZPow.lean |
665 |
7 |
['astrainfinita', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] |
nobody |
453-6800 1 year ago |
unknown |
0-0 0 seconds |
| 11455 |
adomani author:adomani |
fix: unsqueeze simp, re Yaël's comments on #11259 |
This PR reverts/simplifies some of the "squeeze `simp`" changes in #11259.
See #11259 for context.
---
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|
merge-conflict
awaiting-author
|
3/6 |
Mathlib/Algebra/Group/Conj.lean,Mathlib/Data/Seq/WSeq.lean |
2 |
8 |
['Ruben-VandeVelde', 'YaelDillies', 'grunweg', 'loefflerd', 'robertylewis', 'urkud'] |
nobody |
452-75195 1 year ago |
751-18702 751 days ago |
93-60645 93 days |
| 7325 |
eric-wieser author:eric-wieser |
chore: use preimageIso instead of defeq abuse for InducedCategory |
This makes a few things slightly more verbose, but the type casts are now explicit in those places.
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merge-conflict
t-category-theory
awaiting-CI
|
22/21 |
Mathlib/CategoryTheory/EssentialImage.lean,Mathlib/CategoryTheory/Monoidal/Braided.lean,Mathlib/CategoryTheory/Monoidal/Subcategory.lean |
3 |
1 |
['grunweg'] |
nobody |
452-75074 1 year ago |
unknown |
0-0 0 seconds |
| 7874 |
astrainfinita author:astrainfinita |
chore: make `IsScalarTower A A B` and `IsScalarTower A B B` higher priority |
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|
merge-conflict
slow-typeclass-synthesis
t-algebra
awaiting-CI
label:t-algebra$ |
10/9 |
Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Data/Rat/Cast/Defs.lean,Mathlib/GroupTheory/GroupAction/Ring.lean |
4 |
3 |
['astrainfinita', 'grunweg', 'leanprover-bot'] |
nobody |
452-75049 1 year ago |
unknown |
0-0 0 seconds |
| 13038 |
adomani author:adomani |
feat: Mathlib weekly reports |
This PR introduces a weekly cron job that computes a "global" report on the evolution of Mathlib in the previous week.
It consists of
* a CI workflow with a cron job that runs at minight on Sunday (`.github/workflows/mathlib_stats.yaml`);
* a Lean file extracting a categorized list of "all" the declarations in Mathlib (`scripts/count_decls.lean`);
* a bash file computing Git-diff-related information and collating the data from the Lean file (`scripts/mathlib_stats.sh`);
* a convenience CI workflow that is triggered on adding the `test-ci` label and results in posting on the PR and on Zulip the report (`.github/workflows/mathlib_stats_label.yaml`).
The second CI workflow is intended to be removed just before/right after the PR is ready to merge.
[Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/113488-general)
[Thread for the reports](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Mathlib.20weekly.20change.20report)
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awaiting-author
CI
t-meta
|
338/0 |
.github/workflows/mathlib_stats.yaml,.github/workflows/mathlib_stats_label.yaml,scripts/count_decls.lean,scripts/mathlib_stats.sh |
4 |
10 |
['adomani', 'github-actions', 'grunweg', 'kim-em', 'kmill'] |
nobody |
452-75007 1 year ago |
727-6487 727 days ago |
57-4374 57 days |
| 5952 |
eric-wieser author:eric-wieser |
feat: add Qq wrappers for ToExpr |
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- [ ] depends on: #6699 (to appease the linter)
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|
merge-conflict
awaiting-CI
t-meta
|
247/150 |
Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Fin/VecNotation.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Tactic/DeriveToExpr.lean,Mathlib/Tactic/FBinop.lean,Mathlib/Tactic/ToExpr.lean,Mathlib/Util/Qq.lean,test/DeriveToExpr.lean,test/vec_notation.lean |
9 |
7 |
['eric-wieser', 'gebner', 'grunweg'] |
nobody |
452-74875 1 year ago |
1059-31738 1059 days ago |
29-67421 29 days |
| 15483 |
astrainfinita author:astrainfinita |
chore(GroupTheory/Coset): reduce defeq abuse |
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