Mathlib triage dashboard

Welcome to the PR triage page! This page is perfect if you intend to look for pull request which seem to have stalled.
Feedback on designing this page or further information to include is very welcome.

This dashboard was last updated on: October 04, 2025 at 03:14 UTC

Quick links: PR statistics | Not yet landed PRs | Review status | Stale unassigned PRs | Stale assigned PRs | Likely-spurious CI failures | Tech debt PRs | PRs blocked on a zulip discussion | PRs with just a merge conflict | Stale new contributor PRs | PRs not into master | PRs with an 'approved' review | All open PRs | Other lists of PRs

Overall statistics

Found 1960 open PRs overall. Among these PRs

Approved, not yet landed PRs

At the moment,

Review status

There are currently 391 PRs awaiting review. Among these,

On the other hand, 28 PRs are unassigned and have not seen a status change in a week, and 180 PRs are assigned, without recent review activity.

Stale unassigned PRs on the review queue

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Approval(s) Updated Last status change total time in review
28812 yury-harmonic
author:yury-harmonic
feat(PNat/Factors): add attrs and lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 42/0 Mathlib/Data/PNat/Factors.lean 1 1 ['github-actions'] nobody none
41-43612
1 month ago
41-43768
1 month ago
41-43803
41 days
28766 yury-harmonic
author:yury-harmonic
feat(Nat/Factorial): add tail-recursive versions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 58/1 Mathlib/Data/Nat/Factorial/Basic.lean 1 1 ['github-actions', 'plp127'] nobody 1
41-7291
1 month ago
42-73779
1 month ago
42-73824
42 days
28837 yury-harmonic
author:yury-harmonic
feat(ValMinAbs): add lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 24/6 Mathlib/Data/ZMod/ValMinAbs.lean 1 1 ['github-actions'] nobody none
40-71567
1 month ago
40-71577
1 month ago
40-71610
40 days
25292 YaelDillies
author:YaelDillies
feat: the `ConvexCone` generated by a set Define `ConvexCone.copy` and `ConvexCone.hull` and use them to golf the `CompleteLattice` instance. From Toric --- - [x] depends on: #25291 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry toric 94/35 Mathlib/Analysis/Convex/Cone/Basic.lean,Mathlib/Geometry/Convex/Cone/Basic.lean 2 8 ['YaelDillies', 'b-mehta', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody none
38-21099
1 month ago
68-59942
2 months ago
106-11862
106 days
28768 yury-harmonic
author:yury-harmonic
feat(Data/Nat): define `Nat.nthRoot` Define `Nat.nthRoot n a` to be the `n`th root of a natural number `a`. --- This is a dependency of a `norm_num` plugin that can handle `(8 : Real) ^ (2 / 3 : Real)`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 218/0 Mathlib.lean,Mathlib/Data/Nat/NthRoot/Defs.lean,Mathlib/Data/Nat/NthRoot/Lemmas.lean 3 16 ['b-mehta', 'eric-wieser', 'github-actions', 'j-loreaux', 'yury-harmonic'] nobody none
38-20236
1 month ago
41-79945
1 month ago
42-34626
42 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. t-data 35/0 Mathlib/Data/List/Scan.lean 1 9 ['ShreckYe', 'github-actions', 'themathqueen', 'vlad902'] nobody none
34-69253
1 month ago
37-64500
1 month ago
37-64542
37 days
28140 YaelDillies
author:YaelDillies
feat: a `PointedCone`-valued version of `Submodule.span` This is merely to guide typing. From Toric --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry toric 11/2 Mathlib/Geometry/Convex/Cone/Dual.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody none
27-40538
27 days ago
27-40569
27 days ago
55-35458
55 days
29668 harahu
author:harahu
doc: cleanup of kleene star docs This PR: - Corrects "Kleene's star" to "Kleene star" - Clarifies a comment about notation. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability 5/5 Mathlib/Computability/Language.lean 1 1 ['github-actions'] nobody none
18-62811
18 days ago
18-62819
18 days ago
18-62853
18 days
29422 jsm28
author:jsm28
fix(Data/Finset/Max): Use `DecidableEq` for `insert` lemmas These `insert` in these lemma statements uses a `DecidableEq` instance derived from `LinearOrder`; make them syntactically more general by passing in a `DecidableEq` instance separately. (Some `insert` lemmas in this file already take `DecidableEq` hypotheses.) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 8/8 Mathlib/Data/Finset/Max.lean 1 2 ['eric-wieser', 'github-actions'] nobody none
18-36676
18 days ago
26-5954
26 days ago
26-5933
26 days
29690 jt496
author:jt496
chore(SimpleGraph/Subgraph): remove duplicate def and fix names We previously had `Subgraph.topEquiv` and `Subgraph.topIso` for the graph isomorphism `(⊤ : G.Subgraph).coe ≃g G`. `Subgraph.topIso` seems preferable as a name for this so this PR deprecates the other name. Also rename and deprecate `Subgraph.botEquiv` to `Subgraph.botIso`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 5/6 Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 1 1 ['github-actions'] nobody none
18-22266
18 days ago
18-22281
18 days ago
18-22319
18 days
28884 kim-em
author:kim-em
chore: deprecate ShiftLeft Int instance This PR proposes deprecating the `ShiftLeft Int` instance (which allows bit-shifting an integer by an integer), and similarly for `ShiftRight`. These are unused in Mathlib. I'm happy if someone wants to keep this, but I would ask that they: * fix the doc-strings to explain what happens for negative shifts * ~~restores the theorem `Int.shiftLeft_add` which I've commented out on `nightly-testing` (and then revert b33c9d7aaea on `nightly-testing`).~~ * ideally but optionally, complete the API, e.g. reducing shifts by casts back to shifts by a Nat t-data 22/3 Mathlib/Data/Int/Bitwise.lean 1 5 ['eric-wieser', 'github-actions', 'kim-em', 'mathlib4-merge-conflict-bot'] nobody none
18-7995
18 days ago
18-8013
18 days ago
39-62513
39 days
29706 kim-em
author:kim-em
feat: add piCongrSigmaFiber and piCongrFiberwise equivalences ## Summary Add two new equivalence functions for working with fibers and sigma types: - `Equiv.piCongrSigmaFiber`: transforms between functions on sigma fibers and regular pi types - `Equiv.piCongrFiberwise`: lifts fiber-wise equivalences to product equivalences These functions are from the FLT (Fermat's Last Theorem) project and are useful for manipulating dependent function types indexed by fibers of a function. ## Details The new definitions allow for elegant transformations between: 1. Functions defined on sigma types representing fibers of a function 2. Regular dependent functions These are particularly useful in algebraic contexts where one needs to work with products indexed by fibers. ## Context This PR was prepared by Claude (Claude Code) based on the following prompt: > "Please read FLT/Mathlib/Logic/Equiv/Basic.lean, and also the corresponding file in the Mathlib repository. Please prepare a PR to Mathlib containing this content, putting it at an appropriate point in the corresponding Mathlib file. Make sure the PR is label FLT, and write in the PR comment an explanation that the PR was prepared by Claude, including quoting the prompting." The content is sourced from `/Users/kim/projects/lean/FLT/FLT/Mathlib/Logic/Equiv/Basic.lean` in the FLT project repository. 🤖 Generated with [Claude Code](https://claude.ai/code) FLT t-logic 39/0 Mathlib/Logic/Equiv/Basic.lean 1 5 ['Ruben-VandeVelde', 'github-actions', 'kim-em'] nobody none
17-49256
17 days ago
17-49734
17 days ago
17-65943
17 days
29437 NotWearingPants
author:NotWearingPants
feat(Data/Seq): add Seq.subsequence and prove basic theorems about it I added `Seq.subsequence` to compose a sequence with a monotone function, creating a subsequence. Aliased to `Seq.comp` since it's a composition. I also added `Nat.le_induction_step_iff` which is needed to prove a subsequence is a sequence. This proves the comment at the top of `Defs.lean` that says "if `f n = none`, then `f m = none` for all `m ≥ n`" while `IsSeq` only talks about `n+1`. For completion I added the same statement for `Int`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-data new-contributor 114/0 Mathlib/Data/Int/Init.lean,Mathlib/Data/Nat/Init.lean,Mathlib/Data/Seq/Basic.lean,Mathlib/Data/Seq/Defs.lean 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody none
16-55191
16 days ago
16-55212
16 days ago
25-42703
25 days
29756 Ruben-VandeVelde
author:Ruben-VandeVelde
feat: Finsupp.comapDomain_surjective --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) FLT t-data 9/0 Mathlib/Data/Finsupp/Basic.lean 1 1 ['github-actions'] nobody none
16-25919
16 days ago
16-25957
16 days ago
16-25994
16 days
29761 bwangpj
author:bwangpj
feat: Chinese Remainder Theorem for `ZMod n` Define `ZMod.equivPi`, the Chinese Remainder Theorem for `ZMod n`, decomposing it as a product of `ZMod` over its prime power factors. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 22/0 Mathlib/Data/Nat/Factorization/Basic.lean,Mathlib/Data/ZMod/QuotientRing.lean 2 8 ['Ruben-VandeVelde', 'bwangpj', 'github-actions', 'j-loreaux'] nobody none
15-16664
15 days ago
15-16664
15 days ago
15-68049
15 days
29744 espottesmith
author:espottesmith
feat(Combinatorics): define directed hypergraphs This PR defines directed hypergraphs: ``` @[ext] structure DiHypergraph (α : Type*) where /-- The vertex set -/ vertexSet : Set α /-- The edge set -/ edgeSet : Set ((Set α) × (Set α)) /-- Each edge is a pair (s, d), where s ⊆ vertexSet and d ⊆ vertexSet -/ edge_src_dst_isSubset_vertexSet' : ∀ ⦃e⦄, e ∈ edgeSet → e.1 ⊆ vertexSet ∧ e.2 ⊆ vertexSet ``` Additional definitions: - tail/head stars and negative/positive stars - some special cases (B-Graph, F-Graph, BF-Graph, and what I'm calling a "non-endless" dihypergraph, where neither the source/tail nor the destination/head are empty) - Vertex and (hyper)edge adjacency - isolated vertices - empty and nonempty dihypergraphs The design employed here is based off of #28613, but this PR does not depend on that one. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 391/0 Mathlib.lean,Mathlib/Combinatorics/DiHypergraph/Basic.lean 2 1 ['github-actions'] nobody none
11-50470
11 days ago
16-57003
16 days ago
16-57050
16 days
28818 NotWearingPants
author:NotWearingPants
feat(Data/Setoid/Basic): add theorems about lifting a function to its kernel Currently `ker_lift_injective` and `quotientKerEquivOfRightInverse` lift `f` to `ker f` in their definition. This PR makes this function available as `Setoid.ker_lift f` and adds a few more theorems about it. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor easy 29/15 Counterexamples/AharoniKorman.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/FundamentalCone.lean,Mathlib/Topology/Separation/Hausdorff.lean 4 18 ['NotWearingPants', 'eric-wieser', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] nobody 1
10-11015
10 days ago
21-31499
21 days ago
39-46440
39 days
29920 urkud
author:urkud
feat: separable but not second countable LOTS --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 55/0 Counterexamples.lean,Counterexamples/SeparableNotSecondCountable.lean,Mathlib/Data/Prod/Lex.lean 3 1 ['github-actions'] nobody none
10-8560
10 days ago
10-17044
10 days ago
10-17079
10 days
29955 qawbecrdtey
author:qawbecrdtey
feat(Data/Set/Subsingleton): added new lemma `Subsingleton.union_subsingleton` along with some trivial code cleanup --- Added a lemma which implies both sets are subsingleton if their union is subsingleton. ```lean lemma Subsingleton.union_subsingleton (h : (s ∪ t).Subsingleton) : s.Subsingleton ∧ t.Subsingleton ``` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 9/3 Mathlib/Data/Set/Subsingleton.lean 1 1 ['github-actions'] nobody none
9-1754
9 days ago
9-1767
9 days ago
9-1805
9 days
29947 JaafarTanoukhi
author:JaafarTanoukhi
feat(Combinatorics/Digraph): Maps Ported `SimpleGraph/Maps.lean` to `Digraph/Maps.lean` for future PRs related to issue #[26771](https://github.com/leanprover-community/mathlib4/issues/26771) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 476/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Maps.lean 2 1 ['github-actions'] nobody none
8-64833
8 days ago
9-37936
9 days ago
9-37978
9 days
29526 llllvvuu
author:llllvvuu
feat: `Multiset.map f` identifies `f` up to permutation Motivation: Reason about `Fintype`-indexed families via `Multiset` equality. Example use case 1: ```lean theorem Matrix.IsHermitian.cfc_eigenvalues {d : Type*} [Fintype d] [DecidableEq d] {M : Matrix d d 𝕜} (hM : M.IsHermitian) (f : ℝ → ℝ) (hcfc : Matrix.IsHermitian (cfc f M) := cfc_predicate f M) : ∃ (e : d ≃ d), hcfc.eigenvalues = f ∘ hM.eigenvalues ∘ e := by have := hcfc.roots_charpoly_eq_eigenvalues.symm rw [hM.charpoly_cfc_eq f, Polynomial.roots_prod] at this; swap · simp [Finset.prod_ne_zero_iff, Polynomial.X_sub_C_ne_zero] simp_rw [Polynomial.roots_X_sub_C, Multiset.bind_singleton] at this have he := (Multiset.compTriple_equivOfMapUnivEq this).comp_eq simp_rw [← Function.comp_def RCLike.ofReal, ← Function.comp_def f, Function.comp_assoc] at he exact ⟨_, RCLike.ofReal_injective.comp_left he.symm⟩ ``` Example use case 2 (on top of https://github.com/leanprover-community/mathlib4/pull/29610): ```lean theorem LinearMap.Eigenbasis.μ_equiv {ι ι' R G : Type*} [Fintype ι] [Fintype ι'] [CommRing R] [IsDomain R] [AddCommGroup G] [Module R G] [Module.Free R G] [Module.Finite R G] {f : Module.End R G} (B₁ : f.Eigenbasis ι) (B₂ : f.Eigenbasis ι') : ∃ e : ι ≃ ι', B₁.μ = B₂.μ ∘ e := by classical have := congr(Polynomial.roots $(B₁.charpoly_eq.symm.trans B₂.charpoly_eq)) rw [Polynomial.roots_prod, Polynomial.roots_prod] at this; rotate_left · simp [Finset.prod_ne_zero_iff, Polynomial.X_sub_C_ne_zero] · simp [Finset.prod_ne_zero_iff, Polynomial.X_sub_C_ne_zero] simp_rw [Polynomial.roots_X_sub_C, Multiset.bind_singleton] at this exact ⟨Multiset.equivOfMapUnivEq this, (Multiset.compTriple_equivOfMapUnivEq this).comp_eq.symm⟩ ``` Co-authored-by: Aristotle Harmonic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 35/0 Mathlib/Data/Multiset/Fintype.lean 1 8 ['Ruben-VandeVelde', 'github-actions', 'llllvvuu', 'vihdzp', 'wwylele'] nobody none
8-37376
8 days ago
23-6406
23 days ago
23-6401
23 days
29990 pechersky
author:pechersky
feat(Algebra/Subgroup/Lattice): `mem_biSup_of_directedOn` Generalization of existing `mem_iSup_of_directed` On the way to characterization of the torsion subgroup as the sup over all subgroups of roots of unity --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order t-algebra
label:t-algebra$
35/10 Mathlib/Algebra/Group/Subgroup/Lattice.lean 1 1 ['github-actions'] nobody none
7-80279
7 days ago
7-80333
7 days ago
7-80322
7 days
29471 harahu
author:harahu
doc: use en dash instead of hyphen in Akra-Bazzi When joining two names, like is done here, the en dash is usually preferred over a regular hyphen. This also aligns the naming in mathlib with that of [Wikipedia](https://en.wikipedia.org/wiki/Akra%E2%80%93Bazzi_method). Some concern was raised [on Zulip](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.23.2029464.20corrections.20to.20docs.20by.20way.20of.20LLM/near/538466767) regarding what this implies for code searches using `grep` and similar tools. Consequently, tags have been added to make sure searches using the regular hyphen will still hit the relevant files. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability 28/21 Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Computability/AkraBazzi/GrowsPolynomially.lean,Mathlib/Computability/AkraBazzi/SumTransform.lean 3 6 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody none
7-74281
7 days ago
7-74306
7 days ago
24-3845
24 days
29995 vihdzp
author:vihdzp
feat: more lemmas on `Concept` These are used in the [`combinatorial-games`](https://github.com/vihdzp/combinatorial-games) repository. Note that `Concept α α (· ≤ ·)` is the Dedekind-McNeille completion, while `Concept α α (· < ·)` is a modified form of it that's used to define surreal cuts. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 40/0 Mathlib/Order/Concept.lean 1 10 ['github-actions', 'linesthatinterlace', 'vihdzp'] nobody none
7-63642
7 days ago
7-68579
7 days ago
7-68616
7 days
29996 vihdzp
author:vihdzp
chore(Order/Concept): `IsIntent` and `IsExtent` We define predicates for a set to be an intent/extent, and use them to define alternate constructors for a concept. Using these, we golf the complete lattice instances. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 161/95 Mathlib/Order/Concept.lean 1 17 ['github-actions', 'linesthatinterlace', 'plp127', 'vihdzp'] nobody none
6-83047
6 days ago
7-68509
7 days ago
7-68545
7 days
29449 mitchell-horner
author:mitchell-horner
feat(Combinatorics/SimpleGraph): add Turán density related theorems Refactors `tendsto_turanDensity` and implements `turanDensity_eq_sInf` and `isContained_of_card_edgeFinset` (theorems that are common in proofs involving Turán density). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 52/14 Mathlib/Combinatorics/SimpleGraph/Extremal/TuranDensity.lean 1 1 ['github-actions'] nobody none
5-64670
5 days ago
25-17751
25 days ago
25-17792
25 days
29362 stepanholub
author:stepanholub
feat:(Data/List) add the notion of period of List and prove the Periodicity Lemma Add the concept of the period of a List (word, sequence) which is missing, and prove its basic nontrivial property describing under which conditions list can have two periods known as the Periodicity Lemma (aka Fine-Wilf Theorem). --- t-data new-contributor 227/0 Mathlib.lean,Mathlib/Data/List/PeriodicityLemma.lean 2 125 ['Ruben-VandeVelde', 'Timeroot', 'fpvandoorn', 'github-actions', 'madvorak', 'plp127', 'stepanholub', 'wwylele'] nobody 2
5-26634
5 days ago
9-29448
9 days ago
27-25647
27 days
26668 mariainesdff
author:mariainesdff
feat(Analysis/Normed/Unbundled/SpectralNorm): add API Co-authored-by: @faenuccio --- - [ ] depends on: #26667 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis t-number-theory 127/16 Mathlib/Analysis/Normed/Unbundled/SpectralNorm.lean 1 15 ['MichaelStollBayreuth', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody none
4-29918
4 days ago
16-56340
16 days ago
16-57938
16 days

Stale assigned PRs on the review queue

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Approval(s) Updated Last status change total time in review
25864 plp127
author:plp127
feat(Nat/Digits): use fuel in `Nat.digits` Add a `fuel` parameter to `Nat.digitsAux` to make it structurally recursive. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 47/14 Mathlib/Data/Nat/Digits/Defs.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] ericrbg
assignee:ericrbg
none
65-27172
2 months ago
76-17848
2 months ago
96-64400
96 days
27066 vasnesterov
author:vasnesterov
feat(Tactic/Order): frontend for `order` * Support `order [h1, h2]` and `order only [h1, h2]` syntax. * Split conjunctions while extracting facts from the context. E.g. hypotheses in the form `A ∧ B` are converted into two facts `A` and `B`. * Similarly, extract facts from existential quantifiers in the hypotheses. --- - [x] depends on: #26354 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This PR continues the work from #22073. Original PR: https://github.com/leanprover-community/mathlib4/pull/22073 t-meta 91/37 Mathlib.lean,Mathlib/Tactic/Linarith/Frontend.lean,Mathlib/Tactic/Order.lean,Mathlib/Tactic/Order/CollectFacts.lean,Mathlib/Util/ElabWithoutMVars.lean,MathlibTest/order.lean 6 22 ['JovanGerb', 'github-actions', 'mathlib4-dependent-issues-bot', 'vasnesterov'] alexjbest
assignee:alexjbest
none
64-17643
2 months ago
82-63970
2 months ago
82-63992
82 days
25758 YaelDillies
author:YaelDillies
chore: shortcut instance `CompleteLattice α → PartialOrder α` This avoids using the path `CompleteLattice α → CompletePartialOrder α → PartialOrder α` that goes through `Order.CompletePartialOrder` and makes it appear used to our automation, such as `shake` or `#min_imports`. This is a followup to #25358. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 7/0 Mathlib/Order/CompleteLattice/Defs.lean 1 6 ['Ruben-VandeVelde', 'eric-wieser', 'github-actions', 'leanprover-bot'] bryangingechen
assignee:bryangingechen
1
63-8005
2 months ago
94-15745
3 months ago
113-66323
113 days
26061 kckennylau
author:kckennylau
feat(AlgebraicGeometry): define Projective Space This defines the projective space over a scheme, indexed by an arbitrary type. --- Zulip discussion: [#maths > Projective Space](https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Projective.20Space/with/524057860) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry 63/0 Mathlib.lean,Mathlib/AlgebraicGeometry/ProjectiveSpace.lean 2 14 ['callesonne', 'erdOne', 'github-actions', 'kckennylau'] erdOne
assignee:erdOne
none
61-7979
2 months ago
108-9720
3 months ago
108-9760
108 days
26347 mans0954
author:mans0954
feature(Data/Finset/RangeDistance): abs_sub_lt_of_mem_finset_range This PR continues the work from #23161. Original PR: https://github.com/leanprover-community/mathlib4/pull/23161 t-data 30/0 Mathlib.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Data/Finset/RangeDistance.lean 3 2 ['github-actions', 'mans0954'] alreadydone
assignee:alreadydone
none
60-61381
1 month ago
60-61381
1 month ago
101-70788
101 days
26054 FMLJohn
author:FMLJohn
feat(RingTheory/GradedAlgebra/Homogeneous/Subsemiring): homogeneous subsemirings of a graded semiring --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) In this pull request, we have defined homogeneous subsemirings of `GradedRing 𝒜` where `𝒜 : ι → σ`, `SetLike σ A` and `AddSubmonoidClass σ A`. ## Main definitions For any `R : Subsemiring A`: * `Subsemiring.IsHomogeneous 𝒜 R`: The property that a subsemiring is closed under `GradedRing.proj`. * `HomogeneousSubsemiring 𝒜`: The structure extending subsemirings which satisfy `Subsemiring.IsHomogeneous`. t-ring-theory 120/0 Mathlib.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Subsemiring.lean 2 1 ['github-actions'] kim-em
assignee:kim-em
none
59-63325
1 month ago
59-63325
1 month ago
108-32039
108 days
24730 YaelDillies
author:YaelDillies
feat(RingTheory): group-like elements Define group-like elements in a bialgebra, ie elements such that `η a = 1` and `Δ a = a ⊗ₜ a`. We prove that group-like elements of a coalgebra over a domain are linearly independent, group-like elements of a bialgebra form a monoid, group-like elements of a Hopf algebra form a group. From Toric Co-authored-by: Michał Mrugała --- - [x] depends on: #24747 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory toric 309/0 Mathlib.lean,Mathlib/RingTheory/Bialgebra/GroupLike.lean,Mathlib/RingTheory/Coalgebra/GroupLike.lean,Mathlib/RingTheory/HopfAlgebra/GroupLike.lean 4 42 ['Julian-Kuelshammer', 'Parcly-Taxel', 'Whysoserioushah', 'YaelDillies', 'erdOne', 'eric-wieser', 'github-actions', 'leanprover-bot', 'mathlib4-dependent-issues-bot', 'smorel394'] eric-wieser
assignee:eric-wieser
2
59-63219
1 month ago
59-63219
1 month ago
146-20270
146 days
26770 Jun2M
author:Jun2M
feat(Combinatorics/Graph) : subgraph relations and operations on `Graph` This PR creates a new file `Combinatorics/Graph/Subgraph.lean`. In it, the PR introduces a partial order on graphs by subgraph relation, defines relations `IsInducedSubgraph`, `IsSpanningSubgraph` and `IsClosedSubgraph`. Further, it introduce operations `EdgeRestrict`, `EdgeDelete`, `induce` and `VertexDelete`. Co-authored-by: Peter Nelson --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 703/0 Mathlib.lean,Mathlib/Combinatorics/Graph/Subgraph.lean 2 1 ['github-actions'] awainverse
assignee:awainverse
none
58-7993
1 month ago
91-19471
2 months ago
91-19509
91 days
26765 KiringYJ
author:KiringYJ
feat(MeasureTheory/PiSystem): add π-λ theorem and SetLike instance Add two small features to `MeasureTheory/PiSystem`: 1. SetLike instance `instance : SetLike (DynkinSystem α) (Set α)` This lets us write `s ⊆ d` and `t ∈ d` for a DynkinSystem `d`, matching usual mathlib style. 2. `DynkinSystem.pi_lambda` lemma Classical π‑λ theorem: if a π‑system `s` is contained in a Dynkin system `d`, every set measurable for `σ(s)` is also in `d`. Currently, mathlib exposes this result only indirectly (e.g. via `generateFrom_eq`). Although logically equivalent, it is not obvious at first glance that those lemmas are the π‑λ theorem. The new lemma states the result in its familiar textbook form, so users can recognise and cite it immediately. Both pieces are under 10 lines, term‑mode only, and do not modify existing APIs. No breaking changes. No dependencies. new-contributor t-measure-probability 13/0 Mathlib/MeasureTheory/PiSystem.lean 1 13 ['EtienneC30', 'KiringYJ', 'github-actions', 'ocfnash'] RemyDegenne
assignee:RemyDegenne
none
57-7992
1 month ago
64-44041
2 months ago
91-31879
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. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 121/8 Mathlib.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/LawfulSupInf.lean 3 25 ['PierreQuinton', 'YaelDillies', 'github-actions', 'plp127', 'vihdzp'] YaelDillies
assignee:YaelDillies
1
56-58169
1 month ago
68-41466
2 months ago
68-41494
68 days
25779 robin-carlier
author:robin-carlier
feat(CategoryTheory/Bicategory/NaturalTransformations): strong and lax natural transformations of lax functors Given two lax functors `F G` between bicategories, we define lax natural transformations as families of 1-morphisms `∀ a : B, F.obj a ⟶ G.obj a` equipped with a naturality 2-cell `∀ {a b : B} (f : a ⟶ b), app a ≫ G.map f ⟶ F.map f ≫ app b` that are required to satisfy conditions such as naturality, and compatibility with the `mapId` and `mapComp` fields of the source and target functors. This notion dualizes the existing notion of oplax natural transformations between, and tries to narrow the current gap between lax and oplax functors in the library, where the latter has much more formalized API. For maintainability, The code tries to stay as aligned as possible with the code in `CategoryTheory.Bicategory.Naturaltransformations.Oplax`. --- I followed the book by Johnson and Yau for the definition. I made @yuma-mizuno and @callesonne authors of the files, as they are the authors of the original code for Oplax functors, which I basically copy-pasted and modified to make it work with lax functors. They should feel free to modify this if they want. Next thing on the list is to tackle modifications between lax/strong natural transforms of lax transforms, as well as the category instance on lax functors. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #25565.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/25565* t-category-theory 286/0 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Lax.lean,scripts/noshake.json 3 3 ['github-actions', 'yuma-mizuno'] joelriou
assignee:joelriou
1
56-8011
1 month ago
90-69628
2 months ago
112-27989
112 days
27664 pechersky
author:pechersky
feat(Topology,Analysis): discrete topology metric space and normed groups Explicit construction of the discrete topology metric space and normed groups where `dist x y = 1` for all `x != y` Provide PseudoMetricSpace, MetricSpace, Seminormed(Add)Group, and Normed(Add)Group constructions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 137/0 Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Topology/MetricSpace/Basic.lean,Mathlib/Topology/MetricSpace/Pseudo/Constructions.lean 3 3 ['github-actions', 'kckennylau', 'pechersky'] urkud
assignee:urkud
none
56-8003
1 month ago
65-84415
2 months ago
65-84402
65 days
24850 pechersky
author:pechersky
feat(Topology/UniformSpace/Ultra): uniform spaces induced by pseudometrics are ultra if system is ultra Any uniform space has a natural system of pseudometrics definable on it, comprised of those pseudometrics constructed from a descending chain of equivalence relation entourages. In a nonarchimedean uniformity, this pseudometric system induces the uniformity. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #23111 t-topology 509/1 Mathlib.lean,Mathlib/Topology/MetricSpace/BundledFun.lean,Mathlib/Topology/UniformSpace/Ultra/Pseudometrizable.lean 3 8 ['ADedecker', 'fpvandoorn', 'github-actions', 'mathlib4-dependent-issues-bot', 'pechersky'] urkud
assignee:urkud
none
53-8009
1 month ago
115-81719
3 months ago
131-27248
131 days
27000 gasparattila
author:gasparattila
feat(Analysis/Normed/Group/Quotient): isometric versions of isomorphisms This PR adds an isometric version of the third isomorphism theorem for groups and modules. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-analysis 49/2 Mathlib/Analysis/Normed/Group/Quotient.lean 1 1 ['github-actions'] urkud
assignee:urkud
none
53-8004
1 month ago
84-47131
2 months ago
84-47177
84 days
27754 Parcly-Taxel
author:Parcly-Taxel
feat: `finCycle` as iterated `finRotate` Originally used in #25786, but eventually discovered to be unnecessary. t-logic 26/5 Mathlib/Logic/Equiv/Fin/Rotate.lean 1 1 ['github-actions'] fpvandoorn
assignee:fpvandoorn
none
51-7995
1 month ago
64-42751
2 months ago
64-42799
64 days
27946 plp127
author:plp127
refactor: have `MetrizableSpace` not depend on `MetricSpace` Some theorems for uniform spaces with a countably generated uniformity do not mention their uniformity in any of the hypotheses or the conclusion (for example `UniformSpace.isCompact_iff_isSeqCompact`). This PR allows those theorems to be stated for (pseudo)metrizable spaces without importing the real numbers. See also #2032 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 129/102 Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Topology/Compactness/PseudometrizableLindelof.lean,Mathlib/Topology/GDelta/MetrizableSpace.lean,Mathlib/Topology/Metrizable/Basic.lean,Mathlib/Topology/Metrizable/ContinuousMap.lean,Mathlib/Topology/Metrizable/Real.lean,Mathlib/Topology/Metrizable/Uniformity.lean 7 7 ['github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] urkud
assignee:urkud
none
50-7980
1 month ago
59-62665
1 month ago
60-28140
60 days
28141 YaelDillies
author:YaelDillies
chore: deprecate `BialgHom.coe_toLinearMap` `BialgHom.toLinearMap` is a fake projection. From Toric --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory toric easy 5/11 Mathlib/RingTheory/Bialgebra/Hom.lean 1 8 ['YaelDillies', 'eric-wieser', 'github-actions'] alreadydone
assignee:alreadydone
none
48-7983
1 month ago
55-71512
1 month ago
55-71505
55 days
28198 Sebi-Kumar
author:Sebi-Kumar
feat(Analysis/InnerProductSpace/PiL2): Add instances for EuclideanSpace rank and EuclideanSpace being infinite Add an instance for `Fact (Module.finrank 𝕜 (EuclideanSpace 𝕜 (Fin n)) = n)` which is needed to apply [stereographic'](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Geometry/Manifold/Instances/Sphere.html#stereographic') to EuclideanSpace. Also add an instance for `Infinite (EuclideanSpace 𝕜 ι)` where `ι` is a nonempty fintype. I wasn't sure if these should go in separate pull requests, but they seemed similar enough to me. Thank you to Kenny Lau for the suggestions at [#mathlib4 > Instances for EuclideanSpace](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Instances.20for.20EuclideanSpace). --- To provide additional context, I am new to contributing to Mathlib, and I am doing so as a part of the Fields Undergraduate Summer Research Program at the University of Western Ontario under the supervision of Chris Kapulkin and Daniel Carranza. My goal is to contribute that the `n`-sphere is simply connected for `n > 1`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis 6/0 Mathlib/Analysis/InnerProductSpace/PiL2.lean 1 1 ['github-actions'] urkud
assignee:urkud
none
47-7984
1 month ago
54-21220
1 month ago
54-21260
54 days
28072 kckennylau
author:kckennylau
feat(RingTheory/Valuation): make tactic rw_val_equiv Co-authored by Aaron Liu and Bhavik Mehta. A tactic to rewrite relations such as `max (v₁ x) (v₁ y) * v₁ z < 1` into `max (v₂ x) (v₂ y) * v₂ z < 1` , given `h : v₁.IsEquiv v₂`. Allowed relations are `≤`, `<`, `=`, `≠`. Allowed operations are: `0`, `1`, `v₁ r`, `⁻¹`, `^` (both `ℕ` and `ℤ`), `*`, `/`, `min`, `max`. Examples: ```lean example {R Γ₁ Γ₂ : Type} [Ring R] [LinearOrderedCommMonoidWithZero Γ₁] [LinearOrderedCommMonoidWithZero Γ₂] {v₁ : Valuation R Γ₁} {v₂ : Valuation R Γ₂} (h : v₁.IsEquiv v₂) {y z : R} : {x | v₁ x ^ 2 * min (v₁ y) (v₁ z) ≤ 1} = {x | v₂ x ^ 2 * min (v₂ y) (v₂ z) ≤ 1} := by rw_val_equiv h ``` It is also possible to use `←` to rewrite in the opposite direction, and to use `at h1 h3 ⊢` to specify which hypotheses (and/or goal) to rewrite, similar to the syntax of `rw`. There is also `rwa_val_equiv` to work like `rwa`. --- Zulip: [#Is there code for X? > Tactics for comparing equivalent valuations](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Tactics.20for.20comparing.20equivalent.20valuations) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 455/13 Mathlib/RingTheory/Valuation/Basic.lean,MathlibTest/Simproc/ValEquiv.lean 2 34 ['b-mehta', 'eric-wieser', 'github-actions', 'kckennylau', 'pechersky', 'plp127'] erdOne
assignee:erdOne
none
46-7999
1 month ago
56-29691
1 month ago
57-4190
57 days
28191 kckennylau
author:kckennylau
feat(Logic): tag Injective, Surjective, and Bijective with fun_prop --- Zulip: * [#Is there code for X? > surjective is not funprop!](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/surjective.20is.20not.20funprop!) * [#mathlib4 > `fun_prop` for Injective/Surjective/Bijective?](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.60fun_prop.60.20for.20Injective.2FSurjective.2FBijective.3F) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 16/0 Mathlib/Tactic/FunProp.lean 1 3 ['github-actions', 'grunweg', 'kckennylau'] alexjbest
assignee:alexjbest
none
46-7997
1 month ago
53-44508
1 month ago
54-22713
54 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. new-contributor t-combinatorics 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 1 ['github-actions'] awainverse
assignee:awainverse
none
45-8007
1 month ago
56-26476
1 month ago
56-26515
56 days
28153 kckennylau
author:kckennylau
feat(Simproc): Simproc for explicit diagonal matrices ```lean example : (diagonal ![37, -1] : Matrix (Fin 2) (Fin 2) ℤ) = !![37, 0; 0, -1] := by simp ``` --- Shares code with #28148. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 114/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Simproc/Matrix.lean,scripts/noshake.json 4 1 ['github-actions'] alexjbest
assignee:alexjbest
none
45-8005
1 month ago
55-32747
1 month ago
55-32792
55 days
28186 Sebi-Kumar
author:Sebi-Kumar
feat(Topology/Homotopy/Path): Add IsEquiv instance for Path.Homotopic Add `instance : IsEquiv (Path x₀ x₁) Homotopic` to the library. Allow use of lemmas like `of_eq` when proving two paths are homotopic. --- To provide additional context, I am relatively new to contributing to Mathlib, and I am doing so as a part of the Fields Undergraduate Summer Research Program hosted at the University of Western Ontario and supervised by Chris Kapulkin and Daniel Carranza. My goal is to prove that the `n`-sphere is simply connected for `n > 1`. Also, I am not super familiar with `IsEquiv` and when it should/shouldn't be used. I just wanted to use a lemma like `Path.Homotopic.of_eq` at one point while working on my code, and thought this was the best way to add such a result to the library. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology 5/0 Mathlib/Topology/Homotopy/Path.lean 1 4 ['Sebi-Kumar', 'github-actions', 'kckennylau'] PatrickMassot
assignee:PatrickMassot
none
45-8004
1 month ago
54-39334
1 month ago
54-39376
54 days
26428 Ruben-VandeVelde
author:Ruben-VandeVelde
feat: norm_num support for Int.fract --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data t-meta 61/0 Mathlib/Data/Rat/Floor.lean,MathlibTest/norm_num_ext.lean 2 6 ['Rob23oba', 'github-actions', 'grunweg'] Rob23oba
assignee:Rob23oba
none
43-51120
1 month ago
43-51120
1 month ago
99-65601
99 days
28399 Ruben-VandeVelde
author:Ruben-VandeVelde
feat: ring-theoretic fractions in Rat --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 47/0 Mathlib.lean,Mathlib/RingTheory/Localization/Rat.lean 2 1 ['github-actions'] robertylewis
assignee:robertylewis
none
42-8013
1 month ago
50-67349
1 month ago
50-67390
50 days
28473 EtienneC30
author:EtienneC30
feat: toLp and ofLp are analytic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 42/0 Mathlib.lean,Mathlib/Analysis/Analytic/WithLp.lean 2 1 ['github-actions'] hrmacbeth
assignee:hrmacbeth
none
42-8010
1 month ago
49-48584
1 month ago
49-48562
49 days
27245 rirarika
author:rirarika
feat: multivariate polynomial ring properties about irreducibility --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra
label:t-algebra$
88/0 Mathlib.lean,Mathlib/Algebra/MvPolynomial/Irreducible.lean 2 5 ['alreadydone', 'github-actions', 'mbkybky'] alreadydone
assignee:alreadydone
none
41-40801
1 month ago
77-69247
2 months ago
77-69284
77 days
25907 mans0954
author:mans0954
feat: low order roots of unity This PR continues the work from #25470. Original PR: https://github.com/leanprover-community/mathlib4/pull/25470 t-algebra
label:t-algebra$
182/0 Mathlib/Algebra/CharP/Invertible.lean,Mathlib/RingTheory/RootsOfUnity/Complex.lean 2 2 ['github-actions', 'mans0954'] kim-em
assignee:kim-em
none
41-40763
1 month ago
110-53454
3 months ago
110-53497
110 days
28531 Ruben-VandeVelde
author:Ruben-VandeVelde
chore: remove Cardinal imports from Topology.Algebra.InfiniteSum.Group --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 51/15 Mathlib.lean,Mathlib/Analysis/BoxIntegral/UnitPartition.lean,Mathlib/Analysis/Normed/Group/Pointwise.lean,Mathlib/Analysis/Normed/Module/Convex.lean,Mathlib/Analysis/SpecificLimits/Basic.lean,Mathlib/Topology/Algebra/InfiniteSum/Const.lean,Mathlib/Topology/Algebra/InfiniteSum/Group.lean,Mathlib/Topology/Algebra/InfiniteSum/NatInt.lean,Mathlib/Topology/Algebra/InfiniteSum/Order.lean,Mathlib/Topology/Algebra/InfiniteSum/Real.lean,Mathlib/Topology/Category/Stonean/Basic.lean,Mathlib/Topology/Instances/ENNReal/Lemmas.lean,Mathlib/Topology/Instances/NNReal/Lemmas.lean,Mathlib/Topology/MetricSpace/HausdorffDistance.lean,Mathlib/Topology/MetricSpace/Thickening.lean,Mathlib/Topology/PartitionOfUnity.lean 16 4 ['Ruben-VandeVelde', 'YaelDillies', 'github-actions'] TwoFX
assignee:TwoFX
none
41-7979
1 month ago
48-18831
1 month ago
48-18808
48 days
28132 dupuisf
author:dupuisf
feat: preliminary `grind` tags for `IsUnit` This PR adds preliminary `grind` tags for the `IsUnit` predicate. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 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 2 ['github-actions', 'mathlib4-merge-conflict-bot'] kim-em
assignee:kim-em
none
40-7984
1 month ago
49-4332
1 month ago
49-4310
49 days
28325 pechersky
author:pechersky
feat(WithZeroTopology): `locallyCompactSpace_iff_locallyFiniteOrder_units` On the way to golf/generalize the proof that locally compact valued fields have locally finite valuation groups as embodied in `Valued.integer.locallyFiniteOrder_units_mrange_of_isCompact_integer` ] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-order t-topology 160/2 Mathlib/Topology/Algebra/GroupWithZero.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean,Mathlib/Topology/Compactness/Compact.lean 3 1 ['github-actions'] PatrickMassot
assignee:PatrickMassot
none
40-7981
1 month ago
51-76597
1 month ago
51-79301
51 days
23835 chrisflav
author:chrisflav
feat(Topology): cardinality of connected components is bounded by cardinality of fiber We show that if `f : X → Y` is an open and closed map to `Y` and `Y` is connected, the number of connected components of `X` is bounded by the cardinality of the fiber of any point. In particular, if `Y` has finitely many connected components and `f` finite fibers, also `X` as finitely many connected components. From Pi1. --- - [x] depends on: #23849 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 242/1 Mathlib.lean,Mathlib/Data/Set/Lattice.lean,Mathlib/SetTheory/Cardinal/Finite.lean,Mathlib/Topology/Clopen.lean,Mathlib/Topology/Connected/CardComponents.lean,Mathlib/Topology/Connected/Clopen.lean 6 5 ['chrisflav', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] grunweg
assignee:grunweg
none
39-8013
1 month ago
46-51562
1 month ago
48-45590
48 days
27824 ChrisHughes24
author:ChrisHughes24
feat(Calculus): exists_gt_of_deriv_pos and variants --- I created a new file for this as I anticipate there will be many lemmas relating derivatives and monotonicity in future. Some lemmas relating deriviatives to monotonicity are already in mathlib and should maybe moved to the file (e.g. docs#HasDerivWithinAt.nonneg_of_monotoneOn). I stated them in as much generality as I could, copying the generality of `HasDerivWithinAt.nonneg_of_monotoneOn`. - [x] depends on: #28039 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 85/0 Mathlib.lean,Mathlib/Analysis/Calculus/Deriv/Order.lean 2 29 ['ChrisHughes24', 'EtienneC30', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] hrmacbeth
assignee:hrmacbeth
none
39-8010
1 month ago
49-38210
1 month ago
53-55902
53 days
25225 xcloudyunx
author:xcloudyunx
feat(Combinatorics/SimpleGraph): Eulerian walk in connected graph contains all vertices --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 16/0 Mathlib/Combinatorics/SimpleGraph/Trails.lean 1 6 ['IvanRenison', 'github-actions', 'vlad902'] kmill
assignee:kmill
none
37-56648
1 month ago
130-13774
4 months ago
130-13821
130 days
26914 quangvdao
author:quangvdao
feat(Data/PFunctor/Univariate): more definitions for univariate `PFunctor` This PR defines several basic definitions of `PFunctor`, including zero, one, constants, monomials, coproduct (sum), product, sigma, pi, tensor product, universe lifting, and equivalence. We also add: (1) simple lemmas connecting the basic definitions, (2) an automatically derived ext lemma for `PFunctor` via `@[ext]` attribute Some things I'm not clear on: - I define `HAdd` and `HMul` instances for coproduct and product of poly functors having different universe levels. Should I also define `Add` and `Mul` instances for poly functors having the same universe level? - Is it ok to define notation for tensor product, i.e. `@[inherit_doc] scoped infixr:80 " ⊗ " => tensor`? I'm worried it might clash with other notation. - Need a double-check on the priority of notation. Some future definitions to add: - Various equivalences arising from arithmetic identities, e.g., `P + 0 ≃ₚ P`. - Definitions of Lenses and Charts (each of them will be a file or even a folder) - Exponential objects (corresponding to both `prod` and `tensor`) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 144/5 Mathlib/Data/PFunctor/Univariate/Basic.lean 1 19 ['alexkeizer', 'eric-wieser', 'github-actions', 'quangvdao'] eric-wieser
assignee:eric-wieser
1
37-41364
1 month ago
87-9071
2 months ago
87-9110
87 days
23238 YaelDillies
author:YaelDillies
feat: extended floor and ceil My motivation for this is to prove `ENat.toENNReal (⨆ i, f i) = ⨆ i, ENat.toENNReal (f i)` and `ENat.toENNReal (⨅ i, f i) = ⨅ i, ENat.toENNReal (f i)`. Kalle Kytölä independently needs this for his formalisation of statistical physics. From MiscYD --- - [x] depends on: #24781 - [x] depends on: #24782 See #15269 for a past attempt. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
235/0 Mathlib.lean,Mathlib/Algebra/Order/Floor/Extended.lean 2 25 ['YaelDillies', 'b-mehta', 'eric-wieser', 'github-actions', 'grunweg', 'kkytola', 'mathlib4-dependent-issues-bot', 'urkud'] alreadydone
assignee:alreadydone
none
37-35640
1 month ago
145-33005
4 months ago
192-85216
192 days
27163 pechersky
author:pechersky
feat(Topology/ValuativeRel): of and to basis of compatible valuations --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology t-number-theory
label:t-algebra$
205/25 Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 2 27 ['github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'pechersky'] alreadydone
assignee:alreadydone
none
37-28193
1 month ago
37-28214
1 month ago
80-5298
80 days
22662 plp127
author:plp127
feat: Localization.Away.lift (computably) This PR adds `Localization.Away.lift'` and `Localization.Away.lift`, computable alternatives to `Localization.awayLift`. --- - [x] depends on: #24791 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
74/0 Mathlib/RingTheory/Localization/Away/Basic.lean 1 17 ['eric-wieser', 'github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'plp127', 'vihdzp'] mariainesdff
assignee:mariainesdff
none
37-7770
1 month ago
145-12385
4 months ago
211-12360
211 days
28630 Antidite
author:Antidite
feat(Archive/Imo): right isosceles configuration in the complex plane feat(Archive/Imo): right isosceles configuration in the complex plane This adds `Archive/Imo/Imo1975Q3.lean`, formalizing a triangle configuration with points A=0, B=1, C=z and auxiliary points R, P, Q built via complex rotations and sine-based scale factors. Main results: * `angle_and_distance`: ∠QRP = π/2 and dist Q R = dist R P. * Key identity `QRP_rot90`: (Q z).z − R.z = e^{iπ/2} · ((P z).z − R.z). Design/Style: * Minimal imports; module docstring; semantic lemma names; all definitions and theorems live under the namespace `IMO.TriangleConfig`. Moves: - (none) Deletions: - (none) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO new-contributor 196/0 Archive.lean,Archive/Imo/Imo1975Q3.lean 2 36 ['Antidite', 'LLaurance', 'github-actions', 'jsm28'] jsm28
assignee:jsm28
none
36-38202
1 month ago
45-65365
1 month ago
45-65403
45 days
27392 Paul-Lez
author:Paul-Lez
feat(Tactic/SimpUtils): add simproc finding commands This PR adds some commands to allow users to find simprocs/dsimprocs/simp theorems that match on a given pattern. Thanks to Robin Arnez for telling me about `simprocDeclExt` :) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 690/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/SimpUtils.lean,MathlibTest/SimpUtils.lean 4 9 ['Paul-Lez', 'eric-wieser', 'github-actions', 'kmill'] robertylewis
assignee:robertylewis
none
36-35300
1 month ago
59-22039
1 month ago
61-22703
61 days
26484 peabrainiac
author:peabrainiac
feat(Geometry/Diffeology): basics of diffeological spaces Introduces diffeological spaces, smooth maps between them, the D-topology and the standard diffeology on finite-dimensional normed spaces. --- This PR continues the work from #21969. t-differential-geometry 471/0 Mathlib.lean,Mathlib/Geometry/Diffeology/Basic.lean,docs/references.bib 3 10 ['JovanGerb', 'github-actions', 'grunweg', 'lecopivo', 'peabrainiac'] grunweg
assignee:grunweg
none
35-66032
1 month ago
98-848
3 months ago
98-5593
98 days
26240 grunweg
author:grunweg
perf(CommandLinterLinter): use Substring more Probably, these changes make little difference, but let's find out. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter RFC 14/15 Mathlib/Tactic/Linter/CommandStart.lean 1 5 ['github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] joneugster
assignee:joneugster
none
35-65788
1 month ago
105-16951
3 months ago
105-21556
105 days
27516 gaetanserre
author:gaetanserre
feat: add rational approximation lemma for suprema in `unitInterval` Add `sSup_eq_iUnion_rat` lemma that provides a rational approximation characterization of suprema in the unit interval. For monotone functions `f : α → I → ℝ`, the lemma establishes that the set of pairs where `a < sSup {x | f e.1 x < e.2}` equals the union over all rationals `q ∈ I` with `q > a` of the sets `{e | f e.1 q < e.2}`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 44/0 Mathlib/MeasureTheory/Constructions/UnitInterval.lean,Mathlib/Topology/UnitInterval.lean 2 6 ['gaetanserre', 'github-actions', 'mathlib4-merge-conflict-bot', 'ocfnash'] ocfnash
assignee:ocfnash
none
35-42923
1 month ago
40-44642
1 month ago
66-35639
66 days
27433 YaelDillies
author:YaelDillies
refactor: make `⇑e⁻¹ = e.symm` simp From BrauerGroup and ClassFieldTheory --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 217/256 Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/Algebra/Order/Rearrangement.lean,Mathlib/Data/Fintype/Perm.lean,Mathlib/FieldTheory/KrullTopology.lean,Mathlib/GroupTheory/Perm/Basic.lean,Mathlib/GroupTheory/Perm/Centralizer.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Factors.lean,Mathlib/GroupTheory/Perm/Finite.lean,Mathlib/GroupTheory/Perm/Sign.lean,Mathlib/GroupTheory/Perm/Support.lean,Mathlib/GroupTheory/SpecificGroups/Alternating.lean,Mathlib/LinearAlgebra/Matrix/Determinant/Basic.lean,Mathlib/Logic/Equiv/Set.lean 16 3 ['eric-wieser', 'github-actions'] dwrensha
assignee:dwrensha
none
35-8025
1 month ago
47-48155
1 month ago
47-79520
47 days
28560 euprunin
author:euprunin
chore(Combinatorics/Quiver): golf entire `lift_spec` using `rfl` ---
Show trace profiling of lift_spec: <10 ms before, <10 ms after 🎉 ### Trace profiling of `lift_spec` before PR 28560 ```diff diff --git a/Mathlib/Combinatorics/Quiver/Symmetric.lean b/Mathlib/Combinatorics/Quiver/Symmetric.lean index 33e371b283..76a3371b36 100644 --- a/Mathlib/Combinatorics/Quiver/Symmetric.lean +++ b/Mathlib/Combinatorics/Quiver/Symmetric.lean @@ -164,6 +164,7 @@ def lift [HasReverse V'] (φ : Prefunctor V V') : | Sum.inl g => φ.map g | Sum.inr g => reverse (φ.map g) +set_option trace.profiler true in theorem lift_spec [HasReverse V'] (φ : Prefunctor V V') : Symmetrify.of.comp (Symmetrify.lift φ) = φ := by fapply Prefunctor.ext ``` ``` ✔ [147/147] Built Mathlib.Combinatorics.Quiver.Symmetric (1.3s) Build completed successfully (147 jobs). ``` ### Trace profiling of `lift_spec` after PR 28560 ```diff diff --git a/Mathlib/Combinatorics/Quiver/Symmetric.lean b/Mathlib/Combinatorics/Quiver/Symmetric.lean index 33e371b283..3adf874946 100644 --- a/Mathlib/Combinatorics/Quiver/Symmetric.lean +++ b/Mathlib/Combinatorics/Quiver/Symmetric.lean @@ -164,13 +164,10 @@ def lift [HasReverse V'] (φ : Prefunctor V V') : | Sum.inl g => φ.map g | Sum.inr g => reverse (φ.map g) +set_option trace.profiler true in theorem lift_spec [HasReverse V'] (φ : Prefunctor V V') : Symmetrify.of.comp (Symmetrify.lift φ) = φ := by - fapply Prefunctor.ext - · rintro X - rfl - · rintro X Y f - rfl + tauto theorem lift_reverse [h : HasInvolutiveReverse V'] (φ : Prefunctor V V') {X Y : Symmetrify V} (f : X ⟶ Y) : ``` ``` ✔ [147/147] Built Mathlib.Combinatorics.Quiver.Symmetric (1.2s) Build completed successfully (147 jobs). ```
--- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/)
t-combinatorics 2/6 Mathlib/Combinatorics/Quiver/Symmetric.lean 1 1 ['github-actions'] awainverse
assignee:awainverse
none
35-8018
1 month ago
47-36273
1 month ago
47-36317
47 days
26843 vasnesterov
author:vasnesterov
feat(Tactic/Simproc): nested quantifiers in `existsAndEq` Generalize the `existsAndEq` simproc to nested existential quantifiers. For example `∃ a, p a ∧ ∃ b, a = f b ∧ q b` now simplifies to `∃ b, p (f b) ∧ q b`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This PR continues the work from #23365. Original PR: https://github.com/leanprover-community/mathlib4/pull/23365 migrated-from-branch large-import t-meta 457/77 Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Data/List/ProdSigma.lean,Mathlib/Tactic/Simproc/ExistsAndEq.lean,MathlibTest/Simproc/ExistsAndEq.lean 4 15 ['JovanGerb', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-bot-assistant', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot', 'vasnesterov'] kmill
assignee:kmill
none
33-54011
1 month ago
34-21403
1 month ago
88-38938
88 days
25856 MichaelStollBayreuth
author:MichaelStollBayreuth
perf(Data.Real.Sqrt): make Real.sqrt irreducible We try to see what happens if we make Real.sqrt irreducible. There are cases where this makes unification very significantly faster, compare [#mathlib4 > Coercion triggers timeout @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Coercion.20triggers.20timeout/near/517177117). (Migrated manually from #24752) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) migrated-from-branch t-data 7/5 Mathlib/Data/Real/Sqrt.lean 1 5 ['MichaelStollBayreuth', 'github-actions', 'j-loreaux', 'leanprover-bot'] ericrbg
assignee:ericrbg
none
33-22143
1 month ago
33-26859
1 month ago
102-53452
102 days
28296 strihanje01
author:strihanje01
feat(Combinatorics/Additive/VerySmallDoubling): Hamidoune's Freiman-Kneser theorem for nonabelian groups add noncommutative Freiman-Kneser theorem for doubling less than 2-\epsilon --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-combinatorics 339/3 Mathlib/Combinatorics/Additive/VerySmallDoubling.lean 1 14 ['YaelDillies', 'github-actions', 'strihanje01'] awainverse
assignee:awainverse
none
33-7979
1 month ago
43-51233
1 month ago
45-28077
45 days
25920 BoltonBailey
author:BoltonBailey
feat(Data/Finsupp/Basic): `Finsupp.optionElim'` Similar to how Finsupp.cons constructs a map Fin (n + 1) →₀ M from a map Fin n →₀ M, we define Finsupp.optionElim' to construct a map Option α →₀ M from a map α →₀ M, given an additional value for none. We base this on the new optionEquiv definition. As a function, it behaves as Option.elim', hence the name. We prove a variety of API lemmas, based on those for Finsupp.cons, to bring the definitions more in line with the contents of Data/Finsupp/Fin. We also refactor to a new file to help avoid a too-long file and make this more analogous to Finsupp.cons Original PR: https://github.com/leanprover-community/mathlib4/pull/13861 - [x] depends on: #26309 migrated-from-branch t-data 114/23 Mathlib/Algebra/Category/MonCat/Adjunctions.lean,Mathlib/Data/Finsupp/Option.lean 2 15 ['BoltonBailey', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] eric-wieser
assignee:eric-wieser
none
32-74031
1 month ago
32-79077
1 month ago
97-49559
97 days
28602 gmcninch-tufts
author:gmcninch-tufts
feat(Algebra/Polynomial/Module): prove equivalence of a certain tensor product with PolynomialModule For a commutative ring `R` and an `R`-module `M`, construct an equivalence between the `R[X]`-modules `R[X] ⊗[R] M` and `PolynomialModule R M`. This equivalence enables application of some base-change results to `PolynomialModule R M` . --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra
label:t-algebra$
210/0 Mathlib.lean,Mathlib/Algebra/Polynomial/Module/TensorProduct.lean 2 1 ['github-actions'] jcommelin
assignee:jcommelin
none
32-8004
1 month ago
46-43480
1 month ago
46-43518
46 days
26284 plp127
author:plp127
feat: faster implementation of `Nat.primeFactorsList` + `@[csimp]` lemma Add a function `Nat.primeFactorsListFast` that `#eval`s faster, and a `@[csimp]` lemma `Nat.primeFactorsList_eq_primeFactorsListFast` that shows `Nat.primeFactorsList = Nat.primeFactorsListFast`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 95/0 Mathlib/Data/Nat/Factors.lean 1 5 ['b-mehta', 'github-actions', 'grunweg', 'plp127'] b-mehta
assignee:b-mehta
none
31-36734
1 month ago
102-81576
3 months ago
103-9085
103 days
25814 vlad902
author:vlad902
feat(SimpleGraph): Weaker condition for paths in acyclic graphs `IsAcyclic.isPath_iff_chain'` defines a weaker condition for proving that a walk is a path, in particular it shows that rather than proving that all vertices in the support of a walk are distinct, one must only show that consecutive edges are distinct (e.g. every other vertex must be distinct.) This leads to a simple corollary that trails are also paths in acyclic graphs. I had a need for this when formalizing Cayley graphs, since this condition maps cleanly onto words in free groups being reduced. --- *This PR continues the work from #25630.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/25630* t-combinatorics 42/0 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean 2 2 ['github-actions', 'vlad902'] kmill
assignee:kmill
none
31-36655
1 month ago
113-46591
3 months ago
113-46567
113 days
28929 grunweg
author:grunweg
experiment: use `fun_prop` in Homeomorph Can we make the continuity auto-parameters use `fun_prop`? Or perhaps `first |fun_prop; |dsimp; fun_prop`? --- Compared to #13994, it seems this is a much smoother experience. I suspect the RefineDiscTree changes have helped (but that is pure speculation). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 13/5 Mathlib/MeasureTheory/Group/Measure.lean,Mathlib/Topology/Algebra/Algebra/Equiv.lean,Mathlib/Topology/Algebra/Constructions/DomMulAct.lean,Mathlib/Topology/Algebra/ContinuousMonoidHom.lean,Mathlib/Topology/Constructions/SumProd.lean,Mathlib/Topology/Homeomorph/Defs.lean 6 4 ['euprunin', 'github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] PatrickMassot
assignee:PatrickMassot
1
31-8007
1 month ago
39-12285
1 month ago
39-17599
39 days
27308 xyzw12345
author:xyzw12345
feat(LinearAlgebra/SymmetricAlgebra): IsSymmetricAlgebra This PR continues the work from #24602. Original PR: https://github.com/leanprover-community/mathlib4/pull/24602 t-algebra
label:t-algebra$
78/0 Mathlib/LinearAlgebra/SymmetricAlgebra/Basic.lean,Mathlib/LinearAlgebra/SymmetricAlgebra/Basis.lean 2 3 ['github-actions', 'mattrobball', 'xyzw12345'] mattrobball
assignee:mattrobball
none
30-68513
1 month ago
75-45337
2 months ago
75-45383
75 days
28831 qawbecrdtey
author:qawbecrdtey
feat(Logic/Equiv/List): add `decodeList_encodeList_eq_self` and removed unnecessary linter options --- This is useful when we call `encode` and `decode` of a list to define a new `Encoder` involving `List`s. ```lean theorem decodeList_encodeList_eq_self (l : List α) : decodeList (encodeList l) = some l ``` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 7/6 Mathlib/Logic/Equiv/List.lean 1 1 ['github-actions'] awainverse
assignee:awainverse
none
30-8011
1 month ago
41-2055
1 month ago
41-2091
41 days
28906 gasparattila
author:gasparattila
feat(Topology/Algebra/Module): `prod` and `coprod` as `ContinuousLinearEquiv`s --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology 36/5 Mathlib/Topology/Algebra/Module/LinearMapPiProd.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean 2 1 ['github-actions'] jcommelin
assignee:jcommelin
none
30-8010
1 month ago
39-34577
1 month ago
39-34612
39 days
26790 FlAmmmmING
author:FlAmmmmING
feat(Combinatorics/Enumerative/Bell.lean): define standard Bell number --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 46/1 Mathlib/Combinatorics/Enumerative/Bell.lean 1 11 ['AntoineChambert-Loir', 'FlAmmmmING', 'eric-wieser', 'github-actions', 'kckennylau', 'madvorak'] awainverse
assignee:awainverse
1
29-76680
29 days ago
90-39806
2 months ago
90-39846
90 days
26986 WangYiran01
author:WangYiran01
feat(Partition): add bijection for partitions with max part ≤ r ## Summary 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. ## Implementation notes - The proof uses `Multiset.erase` and `Multiset.cons` with basic properties of `sum`, `sup`, and `Partition` structures. - The bijection is implemented explicitly via `f` and `g`, and proven mutually inverse via `Subtype.ext`. ## Linting - [x] Passes `lake build` - [x] Linter clean (no commandStart or longLine issues) ## Author Contributed by Yiran Wang. new-contributor t-combinatorics 85/0 Mathlib/Combinatorics/Enumerative/Partition.lean 1 3 ['WangYiran01', 'github-actions'] b-mehta
assignee:b-mehta
none
29-73214
29 days ago
84-64366
2 months ago
84-64404
84 days
27254 yuanyi-350
author:yuanyi-350
2025 imo problem3 - [x] depends on: #28788 - [x] depends on: #28790 - [x] depends on: #28829 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO 231/0 Archive.lean,Archive/Imo/Imo2025Q3.lean,Mathlib/NumberTheory/Padics/PadicVal/Basic.lean 3 28 ['github-actions', 'jsm28', 'kbuzzard', 'leanprover-community-bot-assistant', 'madvorak', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'themathqueen', 'wwylele', 'yuanyi-350'] jsm28
assignee:jsm28
none
29-60829
29 days ago
31-10095
1 month ago
64-71360
64 days
26277 AntoineChambert-Loir
author:AntoineChambert-Loir
feat(RingTheory/Congruence/Hom): prove basic isomorphisms theorems for ring congruences This file contains elementary definitions involving congruence relations and morphisms for semirings, rings, and algebras. * `RingCon.ker`: the kernel of a monoid homomorphism as a congruence relation * `RingCon.lift`, `RingCon.liftₐ`: the homomorphism / the algebra morphism on the quotient given that the congruence is in the kernel * `RingCon.map`, `RingCon.mapₐ`: homomorphism / algebra morphism from a smaller to a larger quotient * `RingCon.quotientKerEquivRangeS`, `RingCon.quotientKerEquivRange`, `RingCon.quotientKerEquivRangeₐ` : the first isomorphism theorem for semirings (using `RingHom.rangeS`), rings (using `RingHom.range`) and algebras (using `AlgHom.range`). * `RingCon.comapQuotientEquivRangeS`, `RingCon.comapQuotientEquivRange`, `RingCon.comapQuotientEquivRangeₐ` : the second isomorphism theorem for semirings (using `RingHom.rangeS`), rings (using `RingHom.range`) and algebras (using `AlgHom.range`). * `RingCon.quotientQuotientEquivQuotient`, `RingCon.quotientQuotientEquivQuotientₐ` : the third isomorphism theorem for semirings (or rings) and algebras It is an adaptation of what existed for multiplicative congruences (docs#Con) and is only useful for semirings which are not rings. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 554/2 Mathlib.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/RingTheory/Congruence/Defs.lean,Mathlib/RingTheory/Congruence/Hom.lean 5 4 ['AntoineChambert-Loir', 'eric-wieser', 'github-actions'] joneugster
assignee:joneugster
none
28-71061
28 days ago
59-63447
1 month ago
103-19663
103 days
28613 espottesmith
author:espottesmith
feat(Combinatorics): define undirected hypergraphs This PR defines undirected hypergraphs: ``` @[ext] structure Hypergraph (α : Type*) where /-- The vertex set -/ vertexSet : Set α /-- The hyperedge set -/ hyperedgeSet : Set (Set α) /-- All hyperedges must be subsets of the vertex set -/ hyperedge_isSubset_vertexSet : ∀ ⦃e⦄, e ∈ hyperedgeSet → e ⊆ vertexSet ``` In addition to the main definition, some additional definitions and related lemmas are provided: - vertex adjacency - hyperedge adjacency - vertex "stars" - special cases (loops, empty hypergraphs, trivial hypergraphs, complete hypergraphs, simple hypergraphs, k-uniform hypergraphs, and d-regular hypergraphs) - (some) hypergraph cardinality - subhypergraphs, induced subhypergraphs, and partial hypergraphs This implementation is certainly bare-bones. I'm submitting this PR at this point, rather than when my developments are more fleshed out, because there has been some interest in others contributing to hypergraph formalization in mathlib. In the near future, goals include: - defining incidence matrices (i.e., conversion from `Hypergraph α` to `Matrix α (Set α) β` - coersion/generalization of graph as 2-uniform hypergraph - conversion of a hypergraph into its associated clique graph/two-section graph - constructing the dual of a hypergraph (note: on first blush, this appears somewhat challenging, given that we define hyperedges as `Set α` rather than some other type `β`) - rank and co-rank - walks, paths, cycles, etc. on hypergraphs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 375/0 Mathlib.lean,Mathlib/Combinatorics/Hypergraph/Basic.lean 2 52 ['b-mehta', 'espottesmith', 'github-actions', 'jt496', 'lauramonk', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
none
28-60457
28 days ago
28-60457
28 days ago
34-46641
34 days
29028 themathqueen
author:themathqueen
feat(Algebra/Star): define `unitary R →* StarAlgEquiv S R R` Every unitary defines a star-algebra automorphism (this is an extension of a special version of `MulSemiringAction.toRingEquiv` for unitaries). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
64/0 Mathlib.lean,Mathlib/Algebra/Star/UnitaryStarAlgAut.lean 2 14 ['eric-wieser', 'github-actions', 'themathqueen'] eric-wieser
assignee:eric-wieser
none
28-39053
28 days ago
35-62942
1 month ago
37-33549
37 days
19046 j-loreaux
author:j-loreaux
feat: define class `SemigroupAction` --- If I can get this building with minimal performance impact, I would like to change the names to: `MulAction → MonoidAction` `SemigroupAction → MulAction` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
48/26 Mathlib/Algebra/Azumaya/Matrix.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/Hom.lean,Mathlib/Algebra/Group/Action/Prod.lean,Mathlib/Algebra/Group/Action/TypeTags.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/GroupTheory/CoprodI.lean,Mathlib/LinearAlgebra/Eigenspace/Matrix.lean,Mathlib/LinearAlgebra/FreeModule/Finite/Quotient.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/NumberTheory/ModularForms/CongruenceSubgroups.lean,Mathlib/RingTheory/Trace/Basic.lean 13 10 ['alreadydone', 'github-actions', 'j-loreaux', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'urkud'] jcommelin
assignee:jcommelin
none
28-8013
28 days ago
36-24243
1 month ago
42-51530
42 days
28311 eric-wieser
author:eric-wieser
fix(Tactic/NormNum): do not hang on large powers This uses `Lean.checkExponent` to guard against large powers. Unfortunately the log messages it emits are currently swallowed, but surfacing these may require changing the API for norm_num extensions (to live in `OptionT MetaM`) and so is left to future work. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta bug 41/23 Mathlib/Tactic/NormNum/Pow.lean,Mathlib/Tactic/Ring/Basic.lean,MathlibTest/norm_num.lean,MathlibTest/norm_num_ext.lean 4 4 ['github-actions', 'mathlib4-merge-conflict-bot'] robertylewis
assignee:robertylewis
none
28-8011
28 days ago
37-14667
1 month ago
44-67883
44 days
29040 PMKielstra
author:PMKielstra
feat: trapezoidal rule for integration This PR defines the trapezoidal rule and proves the standard error bound on it in terms of bounds on the second derivative. I have vague plans of using this plus interval arithmetic to develop a tactic that can automatically close goals of the form `\integral x in a..b, f x < y` or similar. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability 273/0 Mathlib.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/TrapezoidalRule.lean 3 40 ['PMKielstra', 'github-actions', 'tb65536'] kex-y
assignee:kex-y
1
28-8007
28 days ago
37-14900
1 month ago
37-15339
37 days
29042 vihdzp
author:vihdzp
feat(SetTheory/Ordinal/Exponential): generalize theorems from `y = succ x` to `x < y` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 18/6 Mathlib/SetTheory/Ordinal/Exponential.lean 1 1 ['github-actions'] b-mehta
assignee:b-mehta
none
28-8006
28 days ago
37-4648
1 month ago
37-4634
37 days
29082 grunweg
author:grunweg
RFC: tag `IsInducing` and `Is{Open,Closed,}Embedding` with `fun_prop` I have not tested if this is usable in practice; perhaps it is not. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 37/5 Mathlib/Topology/Constructions.lean,Mathlib/Topology/Defs/Induced.lean,Mathlib/Topology/Maps/Basic.lean 3 1 ['github-actions'] jcommelin
assignee:jcommelin
none
28-8004
28 days ago
36-26656
1 month ago
36-26689
36 days
28970 Whysoserioushah
author:Whysoserioushah
feat(Algebra/Algebra/ReducedNorm) : Defines reduced norm and trace TODO : 1. add the theorem proving reduced charpoly is independent from the choice of AlgEquiv (blocked by this [discussion](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Algebra.2ETensorProduct.2Eassoc/with/536349758)) 2. prove reduced charpoly is "actually" in the polynomial ring of base field (blocked by this [discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.E2.9C.94.20Refactor.20Subfield)) therefore content about this topic is basically the best I could do for now :-( --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
66/0 Mathlib.lean,Mathlib/Algebra/Algebra/ReducedNorm.lean 2 15 ['Whysoserioushah', 'chrisflav', 'eric-wieser', 'github-actions', 'kbuzzard'] chrisflav
assignee:chrisflav
none
27-39354
27 days ago
27-40702
27 days ago
38-42079
38 days
28339 JovanGerb
author:JovanGerb
feat(gcongr): support `@[gcongr]` for `Monotone` and friends This PR adds the feature to `gcongr` that you can now tag lemmas whose conclusion is `Monotone f`, `Antitone f`, etc. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 119/88 Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semiring.lean,Mathlib/Algebra/Order/Module/Algebra.lean,Mathlib/Algebra/Order/Ring/Cast.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/SpecialFunctions/Log/ERealExp.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Arctan.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Multiset/Defs.lean,Mathlib/Data/Nat/Cast/Order/Basic.lean,Mathlib/Data/Rat/Cast/Order.lean,Mathlib/Data/Real/Sqrt.lean,Mathlib/LinearAlgebra/Basis/Flag.lean,Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/Order/Filter/Map.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Tactic/GCongr/Core.lean,MathlibTest/GCongr/inequalities.lean 20 4 ['github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] adamtopaz
assignee:adamtopaz
none
27-7998
27 days ago
38-42628
1 month ago
51-12845
51 days
28833 yury-harmonic
author:yury-harmonic
feat(MvPolynomial/Expand): more lemmas --- - [x] depends on: #28832 - [x] depends on: #28830 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 88/18 Mathlib/Algebra/MvPolynomial/Eval.lean,Mathlib/Algebra/MvPolynomial/Expand.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] dwrensha
assignee:dwrensha
none
27-7996
27 days ago
40-24737
1 month ago
40-26487
40 days
28511 YaelDillies
author:YaelDillies
feat(Finsupp): `congr!`-compatible version of `prod_congr` `congr!` doesn't like the `g1 x (f x)` appearing in the hypothesis of `Finsupp.prod_congr`: `f x` isn't a free variable. Note: A few proofs broke due to `simp` using `congr` lemmas internally. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
17/11 Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/Category/MonCat/Adjunctions.lean,Mathlib/Data/Finsupp/Multiset.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/LowDegree.lean 5 12 ['JovanGerb', 'YaelDillies', 'eric-wieser', 'github-actions', 'kmill'] kmill
assignee:kmill
none
26-59091
26 days ago
48-65546
1 month ago
48-65581
48 days
26453 jburroni
author:jburroni
feat(Data/PNat/Basic): add order-related instances to PNat Add `SuccAddOrder ℕ+` and `NoMaxOrder ℕ+` instances. This allows, for example, the use of lemmas related to `Intervals` built with ℕ+. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 31/0 Mathlib.lean,Mathlib/Data/PNat/Order.lean 2 14 ['Ruben-VandeVelde', 'eric-wieser', 'github-actions', 'jburroni', 'vihdzp'] ericrbg
assignee:ericrbg
1
25-33873
25 days ago
25-38877
25 days ago
95-41188
95 days
28950 Vierkantor
author:Vierkantor
fix(TacticAnalysis): comment out syntax range check In #28802 we discovered the tactic analysis framework does not fire on declarations using `where` clauses. The reason is that `def foo where ...` gets turned into `def foo := { ... }`, and the `{ ... }` syntax is assigned a range outside of the `where ...` syntax; this causes the syntax range check to omit the whole declaration body. I am not entirely sure this is a bug in Lean or it was a misuse of ranges; in the meantime it should be okay to skip the check: the worst that happens is we analyze a piece of syntax outside of the declaration, which we'd get to later anyway. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 23/3 Mathlib/Tactic/TacticAnalysis.lean,MathlibTest/TacticAnalysis.lean 2 3 ['Vierkantor', 'github-actions', 'thorimur'] robertylewis
assignee:robertylewis
none
24-43721
24 days ago
38-62457
1 month ago
38-62436
38 days
27567 themathqueen
author:themathqueen
feat(LinearAlgebra/TensorProduct/Associator): add `lid` and `assoc` tensor lemmas This adds `TensorProduct.lid_tensor` and `TensorProduct.assoc_tensor`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra easy
label:t-algebra$
31/2 Mathlib/LinearAlgebra/TensorProduct/Associator.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean 2 3 ['github-actions', 'themathqueen'] mattrobball
assignee:mattrobball
none
24-40057
24 days ago
54-29580
1 month ago
68-22410
68 days
26909 gasparattila
author:gasparattila
feat(LinearAlgebra/Projectivization/Subspace): correspondence between linear and projective subspaces --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra
label:t-algebra$
69/3 Mathlib/LinearAlgebra/Projectivization/Subspace.lean 1 5 ['eric-wieser', 'gasparattila', 'github-actions'] Vierkantor
assignee:Vierkantor
none
24-32975
24 days ago
87-25605
2 months ago
87-25647
87 days
26331 Timeroot
author:Timeroot
feat(Algebra/Polynomial): Descartes' Rule of signs This PR continues the work from #23681. Original PR: https://github.com/leanprover-community/mathlib4/pull/23681 t-algebra
label:t-algebra$
467/3 Mathlib.lean,Mathlib/Algebra/Polynomial/CoeffList.lean,Mathlib/Algebra/Polynomial/Degree/Operations.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Polynomial/RuleOfSigns.lean,Mathlib/Data/Sign/Defs.lean 6 27 ['Ruben-VandeVelde', 'Timeroot', 'adomani', 'chrisflav', 'github-actions'] adomani
assignee:adomani
none
23-85133
23 days ago
102-716
3 months ago
102-754
102 days
26398 ChrisHughes24
author:ChrisHughes24
feat(ModelTheory): definable functions --- Possibly this should be generalized to partial functions. I migrated the PR by hand instead of using the script. - [x] depends on: #20166 - [x] depends on: #20161 - [x] depends on: #20115 - [x] depends on: #20174 - [x] depends on: #20175 - [x] depends on: #21948 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 618/0 Mathlib.lean,Mathlib/ModelTheory/FunctionalFormula.lean 2 7 ['ChrisHughes24', 'github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot'] fpvandoorn
assignee:fpvandoorn
none
22-31082
22 days ago
100-65270
3 months ago
100-65522
100 days
28695 chrisflav
author:chrisflav
feat(RingTheory): meta properties of bijective ring homomorphisms In particular, we show that bijective is a property local on the (algebraic) source. --- - [x] depends on: #28642 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import 170/7 Mathlib.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/RingTheory/LocalProperties/Exactness.lean,Mathlib/RingTheory/LocalRing/ResidueField/Instances.lean,Mathlib/RingTheory/Localization/Algebra.lean,Mathlib/RingTheory/Localization/Away/Basic.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/RingHom/Bijective.lean,Mathlib/RingTheory/TensorProduct/Basic.lean 11 2 ['github-actions', 'mathlib4-dependent-issues-bot'] kbuzzard
assignee:kbuzzard
none
21-8017
21 days ago
31-27676
1 month ago
31-30719
31 days
24184 YaelDillies
author:YaelDillies
feat: `[G : H]` notation for the index of `H : Subgroup G` This is a cute notation which I wrote for FLT. Not sure whether we want it in mathlib nor how to include `relindex` in the picture. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra RFC
label:t-algebra$
5/0 Mathlib/GroupTheory/Index.lean 1 8 ['YaelDillies', 'erdOne', 'github-actions', 'j-loreaux', 'kbuzzard', 'mathlib4-merge-conflict-bot'] eric-wieser
assignee:eric-wieser
none
20-29303
20 days ago
20-29328
20 days ago
168-17044
168 days
27936 alreadydone
author:alreadydone
feat(Algebra): additivize Dvd and Prime `Prime` can't be directly additivized, so we introduce `Preprime`, which drops the `≠ 0` condition, and additivize it to `AddPrime`. To show that `Preprime` is a reasonable definition, we show its connection to `Irreducible` under `IsPrimal` and `IsRegular` conditions. We also show that an element in a product monoid is preprime iff one component is a unit and the other is preprime, and the same with `Preprime` replaced by `Irreducible`. Also additivize `IsPrimal`, `IsRelPrime` and `DecompositionMonoid`. The motivation is that the primality of `single g 1` in `AddMonoidAlgebra k G` is connected to the primality of `g` in `G`. --- I've checked [all 29 files](https://github.com/search?q=repo%3Aleanprover-community%2Fmathlib4%20%E2%88%A3%20to_additive&type=code) containing the `∣` symbol and the `to_additive` attribute and fixed the wrongly translated (`dvd` to `addDvd`) names. TODO: connect (Add)Dvd to [ExistsMul/AddOfLE](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Monoid/Unbundled/ExistsOfLE.html#ExistsMulOfLE) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
400/191 Mathlib.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/Divisibility/Basic.lean,Mathlib/Algebra/Divisibility/Finite.lean,Mathlib/Algebra/Divisibility/Hom.lean,Mathlib/Algebra/Divisibility/Prod.lean,Mathlib/Algebra/Divisibility/Units.lean,Mathlib/Algebra/Group/Action/Pointwise/Finset.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/GroupWithZero/Associated.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Algebra/Prime/Defs.lean,Mathlib/Algebra/Prime/Lemmas.lean,Mathlib/Algebra/Prime/Prod.lean,Mathlib/Data/Nat/Prime/Defs.lean,Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/GroupTheory/Coset/Card.lean,Mathlib/GroupTheory/Exponent.lean,Mathlib/GroupTheory/GroupAction/Blocks.lean,Mathlib/GroupTheory/GroupAction/Period.lean,Mathlib/GroupTheory/Index.lean,Mathlib/GroupTheory/OrderOfElement.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean,Mathlib/GroupTheory/Schreier.lean,Mathlib/GroupTheory/SpecificGroups/Cyclic.lean,Mathlib/Tactic/ToAdditive/GuessName.lean 30 11 ['JovanGerb', 'adomani', 'alreadydone', 'bryangingechen', 'github-actions', 'mathlib4-merge-conflict-bot'] bryangingechen
assignee:bryangingechen
none
20-21570
20 days ago
20-28717
20 days ago
58-78001
58 days
27252 Parcly-Taxel
author:Parcly-Taxel
feat: sharp bounds for `‖exp (I * x) - 1‖` when `x` is real From Carleson carleson t-analysis 44/0 Mathlib/Analysis/Complex/Trigonometric.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Bounds.lean 2 13 ['Parcly-Taxel', 'eric-wieser', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] hrmacbeth
assignee:hrmacbeth
none
20-7992
20 days ago
27-60417
27 days ago
28-66875
28 days
29055 vihdzp
author:vihdzp
feat: `Ordinal.toENat` We essentially copy the Cardinal/ENat file but make it for ordinals instead. See [Zulip](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2317758.20Ordinal.2EtoENat/near/479768508) for some prior discussion on this PR (particularly, the duplication and how there's no easy way to resolve it.) --- Moved from #17758. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 292/0 Mathlib.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/SetTheory/Cardinal/ENat.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/ENat.lean 6 1 ['github-actions'] alreadydone
assignee:alreadydone
none
20-7990
20 days ago
36-60622
1 month ago
36-60641
36 days
22039 YaelDillies
author:YaelDillies
feat: simproc for computing `Finset.Ixx` of natural numbers --- - [x] depends on: #22290 - [x] depends on: #22559 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-meta 315/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Simproc/FinsetInterval.lean,Mathlib/Util/Qq.lean 4 64 ['FLDutchmann', 'Paul-Lez', 'YaelDillies', 'eric-wieser', 'github-actions', 'grunweg', 'kckennylau', 'kim-em', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'urkud'] eric-wieser
assignee:eric-wieser
none
19-62877
19 days ago
170-61109
5 months ago
226-21821
226 days
27107 AntoineChambert-Loir
author:AntoineChambert-Loir
feat(GroupTheory/GroupAction/SubMulAction/Combination) : combinations and group actions `Nat.Combination X n` is the type all `s : Finset X` such that `s.card = n`. This PR provides some API for this subtype and the `SubMulAction` it inherits when a group acts on `X`. It will be used in conjunction with the description of some maximal subgroups of `Equiv.Perm X` to construct primitive actions. Question on the names: when `X` is a fintype, there is `Finset.powersetCard` that gives the same object, as a `Finset`. But the present PR also applies when `X` is infinite. Then maybe `Nat.Combination` should be renamed as `Set.powersetCard`? --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory 325/0 Mathlib.lean,Mathlib/Data/Fintype/EquivFin.lean,Mathlib/Data/Nat/Choose/Basic.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/Combination.lean 4 39 ['AntoineChambert-Loir', 'alreadydone', 'github-actions', 'tb65536'] alreadydone
assignee:alreadydone
none
19-22517
19 days ago
59-62839
1 month ago
82-6181
82 days
26544 vihdzp
author:vihdzp
feat(SetTheory/ZFC/Ordinal): Lean ordinals to ZFC ordinals We define `Ordinal.toZFSet` and prove that its outputs are precisely the ZFC ordinals. Moved from #19985. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-set-theory 166/5 Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Ordinal.lean,Mathlib/SetTheory/ZFC/PSet.lean,Mathlib/SetTheory/ZFC/Rank.lean 4 23 ['alreadydone', 'github-actions', 'leanprover-community-bot-assistant', 'staroperator', 'vihdzp'] b-mehta
assignee:b-mehta
1
19-7985
19 days ago
26-62943
26 days ago
53-40301
53 days
22043 YaelDillies
author:YaelDillies
chore: shortcut instance for `Neg ℤˣ` This lets us avoid importing `Ring` in downstream files (most of the effect is to come). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-algebra
label:t-algebra$
20/47 Mathlib.lean,Mathlib/Algebra/GCDMonoid/Nat.lean,Mathlib/Algebra/Group/Int/Units.lean,Mathlib/Algebra/Order/Ring/Abs.lean,Mathlib/Algebra/Ring/Int/Units.lean,Mathlib/Algebra/Ring/NegOnePow.lean,Mathlib/Data/Fintype/Units.lean,Mathlib/Data/Int/AbsoluteValue.lean,Mathlib/Data/Int/Associated.lean,Mathlib/GroupTheory/HNNExtension.lean,Mathlib/NumberTheory/NumberField/Basic.lean,MathlibTest/Zify.lean 12 17 ['YaelDillies', 'erdOne', 'eric-wieser', 'github-actions', 'j-loreaux', 'leanprover-community-bot-assistant', 'mathlib-bors'] eric-wieser
assignee:eric-wieser
none
18-66798
18 days ago
142-49835
4 months ago
227-22861
227 days
28533 kim-em
author:kim-em
feat(linarith): add `linarith?` mode which suggests a `linarith only` call Adds `linarith?`, which traces the internal to watch which inequalities are being used, and suggests a `linarith only` call via the "try this:" mechanism. Also adds a `+minimize` flag, on by default, which then greedily tries to drop hypotheses from the used set, to see if the problem is still possible with a smaller set. Currently I don't have test case showing this is worthwhile, however. Contributions welcome. ------ https://chatgpt.com/codex/tasks/task_e_68a02bce93a883218485c7e7cafb877a codex t-meta 212/68 Mathlib/Tactic/Linarith/Frontend.lean,Mathlib/Tactic/Linarith/Verification.lean,MathlibTest/linarith.lean 3 12 ['YaelDillies', 'eric-wieser', 'github-actions', 'hrmacbeth', 'jcommelin', 'kim-em', 'mathlib4-merge-conflict-bot'] robertylewis
assignee:robertylewis
none
18-51125
18 days ago
32-516
1 month ago
47-86276
47 days
25183 YaelDillies
author:YaelDillies
feat: convolution product on linear maps from a coalgebra to an algebra Construct the ring structure on linear maps `C → A` where `C` is a coalgebra and `A` an algebra, where multiplication is given by `(f * g)(x) = ∑ f x₍₁₎ * g x₍₂₎` in Sweedler notation or ``` | μ | | / \ f * g = f g | | \ / δ | ``` diagrammatically, where `μ` stands for multiplication and `δ` for comultiplication. [Zulip](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/.60Mul.60.20instance.20on.20algebra.20homomorphisms.20from.20monoid.20algebra) From Toric Co-authored-by: Michał Mrugała Co-authored-by: Yunzhou Xie --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) toric t-algebra
label:t-algebra$
263/10 Mathlib.lean,Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/RingTheory/Coalgebra/Basic.lean,Mathlib/RingTheory/Coalgebra/Convolution.lean,Mathlib/RingTheory/Regular/RegularSequence.lean 7 86 ['YaelDillies', 'erdOne', 'eric-wieser', 'github-actions', 'kbuzzard', 'smorel394', 'themathqueen'] kbuzzard
assignee:kbuzzard
1
18-47471
18 days ago
36-63143
1 month ago
131-29192
131 days
26580 vasnesterov
author:vasnesterov
feat(Tactic/Order): translate linear orders to `Int` It was [pointed out](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/tactic.20for.20partial.20orders/near/515897754) that `order` is not complete for linear orders with lattice operations (while it remains complete for linear orders without lattice operations and for general lattices without assuming linearity). The problem for linear orders with lattice operations is NP-hard, but it can be translated from an arbitrary type to `Int` and then solved using a smart and efficient procedure (such as `omega`). This PR implements such a translation within the `order` tactic. Co-authored-by: Aaron Liu --- - [x] depends on: #26354 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 300/29 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Order.lean,Mathlib/Tactic/Order/Graph/Basic.lean,Mathlib/Tactic/Order/Preprocessing.lean,Mathlib/Tactic/Order/ToInt.lean,MathlibTest/order.lean 7 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vasnesterov'] alexjbest
assignee:alexjbest
none
18-41786
18 days ago
18-41794
18 days ago
82-56098
82 days
26110 YaelDillies
author:YaelDillies
feat: sharp monoids Define sharp monoids, which are the monoids whose only unit is `1`. This concept is useful in log geometry and in particular shows up in the theory of affine monoids. This concept already existed in the guise of `Subsingleton Mˣ`, but giving it a name makes it easier to refer to and uncovers some missing instances. From Toric --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) toric t-algebra
label:t-algebra$
51/30 Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Irreducible/Defs.lean,Mathlib/Algebra/Group/Pi/Units.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/Submonoid/Units.lean,Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Associated.lean,Mathlib/Algebra/GroupWithZero/Divisibility.lean,Mathlib/Data/List/Prime.lean,Mathlib/Data/ZMod/Basic.lean,Mathlib/NumberTheory/DirichletCharacter/Basic.lean,Mathlib/RingTheory/ChainOfDivisors.lean,Mathlib/RingTheory/IntegralDomain.lean,Mathlib/RingTheory/UniqueFactorizationDomain/NormalizedFactors.lean,Mathlib/RingTheory/Valuation/Integers.lean 18 7 ['YaelDillies', 'b-mehta', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot', 'vihdzp'] adomani
assignee:adomani
none
18-40936
18 days ago
22-35367
22 days ago
106-35411
106 days
28973 YaelDillies
author:YaelDillies
feat(TensorProduct): `lTensor` as an `AlgHom` and other lemmas From Toric Co-authored-by: Michał Mrugała --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory toric 21/0 Mathlib/RingTheory/TensorProduct/Basic.lean 1 7 ['YaelDillies', 'eric-wieser', 'github-actions', 'themathqueen'] mattrobball
assignee:mattrobball
none
17-75773
17 days ago
18-8971
18 days ago
20-32669
20 days
26735 Raph-DG
author:Raph-DG
feat(AlgebraicGeometry): The codimension of a point of a scheme is equal to the krull dimension of the stalk In this PR we show that the codimension of a point in a scheme is equal to the krull dimension of the local ring at that point, as in stacks 02IZ. --- The proof of the main result `stalk_dim_eq_coheight` is currently a bit long for my (and I suspect the broader community's) tastes. That said, I'm not quite sure the best way to break it into pieces, any comments would be very much appreciated! - [ ] depends on: #26204 [For the notion of codimension, here we are using the coheight in the specialization order. ] - [ ] depends on: #26225 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry 204/1 Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Topology/KrullDimension.lean 3 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] erdOne
assignee:erdOne
none
17-8010
17 days ago
24-70680
24 days ago
24-71451
24 days
29132 YaelDillies
author:YaelDillies
feat(AdjoinRoot): bundle operations as `AlgHom`s In particular, generalise and rename `liftHom` to use a general `eval₂` instead of `aeval`. From Toric Co-authored-by: Andrew Yang the.erd.one@gmail.com Co-authored-by: Michał Mrugała kiolterino@gmail.com --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory toric 164/103 Mathlib/Algebra/Algebra/Hom.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Basic.lean,Mathlib/FieldTheory/Isaacs.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/FieldTheory/Minpoly/IsIntegrallyClosed.lean,Mathlib/RingTheory/Adjoin/Field.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/LocalRing/ResidueField/Instances.lean,Mathlib/RingTheory/Localization/Away/AdjoinRoot.lean 9 3 ['erdOne', 'github-actions', 'mathlib4-merge-conflict-bot'] erdOne
assignee:erdOne
none
17-8008
17 days ago
31-45320
1 month ago
33-55779
33 days
27292 gasparattila
author:gasparattila
feat: asymptotic cone of a set This PR defines the asymptotic cone of a set in a normed affine space and proves its main properties. This is partial progress towards showing that an unbounded finite-dimensional convex set contains a ray. --- - [x] depends on: #27221 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge new-contributor t-analysis 466/0 Mathlib.lean,Mathlib/Analysis/Normed/Affine/AsymptoticCone.lean,Mathlib/Order/Filter/Map.lean,Mathlib/Topology/Algebra/AsymptoticCone.lean 4 45 ['AntoineChambert-Loir', 'YaelDillies', 'gasparattila', 'github-actions', 'mathlib4-dependent-issues-bot'] YaelDillies
assignee:YaelDillies
1
16-75947
16 days ago
59-37840
1 month ago
73-55374
73 days
24794 chrisflav
author:chrisflav
feat(RingTheory/Presentation): core of a presentation If `P` is a presentation of `S` as an `R`-algebra and `R₀` a subring of `R` containing the coefficients of the relations of `P`, then there exists an `R₀`-algebra `S₀` such that `S` is isomorphic to the base change of `S₀` to `R`. This is a tool to remove Noetherian hypothesis in certain situations. --- - [x] depends on: #24788 - [x] depends on: #24786 - [x] depends on: #24785 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 256/6 Mathlib.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Tower.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/RingTheory/AlgebraicIndependent/Transcendental.lean,Mathlib/RingTheory/Extension/Presentation/Core.lean,Mathlib/RingTheory/FiniteType.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/RingTheory/LinearDisjoint.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean 10 17 ['chrisflav', 'erdOne', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] Vierkantor
assignee:Vierkantor
none
16-43559
16 days ago
20-26096
20 days ago
116-10331
116 days
28699 chrisflav
author:chrisflav
feat(RingTheory/Cotangent): cotangent of composition with localization away from an element Let `R → S → T` be algebras such that `T` is the localization of `S` away from one element, where `S` is generated over `R` by `P : R[X] → S` with kernel `I` and `Q : S[Y] → T` is the canonical `S`-presentation of `T` with kernel `K`. Denote by `J` the kernel of the composition `R[X,Y] → T`. We deduce `J/J² ≃ₗ[T] T ⊗[S] (I/I²) × K/K²` from the Jacobi Zariski sequence. From Pi1. --- - [x] depends on: #28697 The import increase is expected: This file was PRed in two steps and only the second one depends on more imports. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import 157/4 Mathlib/RingTheory/Extension/Cotangent/LocalizationAway.lean,Mathlib/RingTheory/Extension/Generators.lean,Mathlib/RingTheory/Extension/Presentation/Basic.lean,Mathlib/RingTheory/Smooth/StandardSmoothCotangent.lean 4 4 ['chrisflav', 'erdOne', 'github-actions', 'mathlib4-dependent-issues-bot'] erdOne
assignee:erdOne
none
16-42731
16 days ago
43-49813
1 month ago
43-51223
43 days
26129 LessnessRandomness
author:LessnessRandomness
feat(Geometry/Euclidean/Angle/Unoriented): triangle inequality for angles This PR continues the work from #24206. Original PR: https://github.com/leanprover-community/mathlib4/pull/24206 new-contributor t-euclidean-geometry 203/16 Mathlib.lean,Mathlib/Analysis/Fourier/FiniteAbelian/Orthogonality.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Affine.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Basic.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/TriangleInequality.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean 8 76 ['JovanGerb', 'LessnessRandomness', 'Timeroot', 'github-actions', 'jsm28', 'mathlib4-merge-conflict-bot', 'themathqueen'] jsm28
assignee:jsm28
none
16-36028
16 days ago
29-12745
29 days ago
104-40538
104 days
29324 tb65536
author:tb65536
refactor(Analysis/Calculus/IteratedDeriv/Defs): tweak statement of `iteratedDerivWithin_one` This PR removes the `x` from `iteratedDerivWithin_one` to make it match `iteratedDerivWithin_zero`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 3/2 Mathlib/Analysis/Calculus/IteratedDeriv/Defs.lean 1 3 ['Ruben-VandeVelde', 'github-actions', 'grunweg'] grunweg
assignee:grunweg
none
16-32181
16 days ago
30-28123
1 month ago
30-28102
30 days
26961 mariainesdff
author:mariainesdff
feat(RingTheory/PowerSeries/Substitution): add API Co-authored-by: @AntoineChambert-Loir --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 57/5 Mathlib/RingTheory/PowerSeries/Basic.lean,Mathlib/RingTheory/PowerSeries/Substitution.lean 2 13 ['Ruben-VandeVelde', 'github-actions', 'mariainesdff', 'mattrobball'] mattrobball
assignee:mattrobball
none
15-56875
15 days ago
15-56875
15 days ago
62-76898
62 days
25831 ScottCarnahan
author:ScottCarnahan
feat (RingTheory/HahnSeries): Powers of a binomial This PR introduces powers of a binomial `single g 1 - single g' 1` in a Hahn series, where the powers take values in a binomial ring. These series behave as one would expect with respect to addition of powers, and comparison with natural number powers. They are often used in the theory of vertex algebras. --- - [x] depends on: #25830 - [x] depends on: #27497 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24102.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24102* t-ring-theory 132/0 Mathlib.lean,Mathlib/RingTheory/HahnSeries/Addition.lean,Mathlib/RingTheory/HahnSeries/Binomial.lean,Mathlib/RingTheory/HahnSeries/HEval.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean 5 13 ['ScottCarnahan', 'github-actions', 'kbuzzard', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] kbuzzard
assignee:kbuzzard
none
15-30063
15 days ago
50-17454
1 month ago
50-18910
50 days
26827 pechersky
author:pechersky
feat(Analysis/Normed/ValuativeRel): helper instance for NormedField --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #26713 - [x] depends on: #26826 t-algebra t-analysis t-number-theory
label:t-algebra$
205/20 Mathlib.lean,Mathlib/Analysis/Normed/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 3 19 ['ADedecker', 'adamtopaz', 'github-actions', 'kbuzzard', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] kbuzzard
assignee:kbuzzard
none
15-12254
15 days ago
51-40894
1 month ago
88-20212
88 days
26096 vasnesterov
author:vasnesterov
feat(Topology/Instances): Cantor set is the set of ternary numbers without `1`s * Prove `ofDigits_zero_two_sequence_mem_cantorSet`: If `x = 0.d₀d₁...` in base-3, and none of the digits `dᵢ` is `1`, then `x` belongs to the Cantor set. * Prove `ofDigits_zero_two_sequence_unique`: such a representation is uniquie. * Define `toTernary` which converts a real number from the Cantor set to its ternary representation without `1`s. * Prove `ofDigits_cantorToTernary : ofDigits (cantorToTernary x) = x`. --- This is a prerequisite for #26136. - [x] depends on: #26001 - [x] depends on: #26021 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-topology 231/0 Mathlib/Topology/Instances/CantorSet.lean,scripts/noshake.json 2 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] jcommelin
assignee:jcommelin
none
15-7999
15 days ago
22-20538
22 days ago
22-20896
22 days
29530 ShreckYe
author:ShreckYe
feat(Dynamics/PeriodicPts): some theorems for `Pi.map` in `Dynamics/PeriodicPts` analogous to those for `Prod.map` Split from #29204. Some namespace prefixes are added in `GroupTheory/OrderOfElement.lean` to distinguish the extra imports introduced. - [ ] depends on: #29528 large-import 77/8 Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/Dynamics/PeriodicPts/Lemmas.lean,Mathlib/GroupTheory/OrderOfElement.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] dupuisf
assignee:dupuisf
none
15-7993
15 days ago
22-33826
22 days ago
22-34480
22 days
29569 chrisflav
author:chrisflav
chore(RingTheory/LocalProperties): add algebra versions of exactness lemmas The module variants are less convenient to apply directly in the case of algebras. From Pi1. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 67/0 Mathlib/RingTheory/LocalProperties/Exactness.lean 1 1 ['github-actions'] mattrobball
assignee:mattrobball
none
15-7988
15 days ago
22-14307
22 days ago
22-14427
22 days
27306 xyzw12345
author:xyzw12345
feat: `lie_ring` tactic and `LieReduce` command This PR continues the work from #22196. Original PR: https://github.com/leanprover-community/mathlib4/pull/22196 t-meta 810/2 Mathlib.lean,Mathlib/Algebra/Lie/Derivation/AdjointAction.lean,Mathlib/Tactic.lean,Mathlib/Tactic/LieAlgebra/Basic.lean,Mathlib/Tactic/LieAlgebra/LieRingNF.lean,Mathlib/Util/AtomM.lean,MathlibTest/lie_ring.lean,scripts/noshake.json 8 12 ['JovanGerb', 'github-actions', 'xyzw12345'] JovanGerb
assignee:JovanGerb
none
14-80407
14 days ago
24-84996
24 days ago
72-52075
72 days
26829 pechersky
author:pechersky
feat(RingTheory/Valuation): Valuation.leAddSubgroup and ideal/submodule versions of ltAddSubgroup Extracted from #25450 without changing how Valued works --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) @faenuccio hopefully this bypasses any wait on #14752 because I am not changing Valued files. t-ring-theory 173/0 Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/Integers.lean 2 7 ['JovanGerb', 'github-actions', 'mariainesdff', 'mathlib4-merge-conflict-bot', 'pechersky'] mariainesdff
assignee:mariainesdff
none
14-39953
14 days ago
56-30339
1 month ago
89-4853
89 days
29400 ShreckYe
author:ShreckYe
feat(`Algebra/BigOperators`): products of the results of insertion and removal on tuples and lists, and some needed lemmas large-import 102/0 Mathlib.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Defs.lean,Mathlib/Algebra/BigOperators/Group/Vector/Basic.lean,Mathlib/Data/Fin/Tuple/Basic.lean 6 6 ['ShreckYe', 'bryangingechen', 'eric-wieser', 'github-actions'] bryangingechen
assignee:bryangingechen
none
14-19837
14 days ago
26-55789
26 days ago
26-55834
26 days
27429 smorel394
author:smorel394
feat(RepresentationTheory/FinGroupCharZero): applications of Maschke's theorem Prove some properties of representations that follow from Maschke's theorem: * If `G` is a finite group whose order is invertible in a field `k`, then every object of `Rep k G` (resp. `FDRep k G`) is injective and projective. * For an object `V` of `FDRep k G`, when `k` is an algebraically closed field in which the order of `G` is invertible: (1) `V` is simple if and only `V ⟶ V` is a `k`-vector space of dimension `1` (`FDRep.simple_iff_end_is_rank_one`); (2) When `k` is characteristic zero, `V` is simple if and only if `∑ g : G, V.character g * V.character g⁻¹ = Fintype.card G` (`FDRep.simple_iff_char_is_norm_one`). Note: This used to be #27165, but it was closed for some reason I don't understand. - [x] depends on: #27154 - [x] depends on: #27134 - [x] depends on: #27125 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
135/0 Mathlib.lean,Mathlib/RepresentationTheory/FinGroupCharZero.lean 2 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] jcommelin
assignee:jcommelin
none
14-8010
14 days ago
21-40147
21 days ago
21-40499
21 days
29562 ShreckYe
author:ShreckYe
feat(Analysis/SpecialFunctions/Trigonometric): tangent half-angle substitution t-analysis 82/0 Mathlib/Analysis/SpecialFunctions/Trigonometric/Complex.lean 1 1 ['github-actions'] urkud
assignee:urkud
none
14-8005
14 days ago
22-39247
22 days ago
22-39288
22 days
29587 uniwuni
author:uniwuni
feat(GroupTheory/Finiteness): define finitely generated semigroups We define finitely generated semigroups and basics similarly to monoids and groups and prove that semigroups and monoids remain finitely generated when a congruence is quotiented out. This will be important when further developing semigroup theory. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 259/14 Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/GroupTheory/Finiteness.lean 2 3 ['github-actions', 'plp127', 'uniwuni'] dupuisf
assignee:dupuisf
none
14-8004
14 days ago
21-54188
21 days ago
21-54166
21 days
29235 yoh-tanimoto
author:yoh-tanimoto
feat(Topology/Algebra/Module/ClosedSubmodule): add `mapEquiv`, a variation of `ClosedSubmodule.map` for CLE add `ClosedSubmodule.mapEquiv` for continuous linear equivalence. In this case, a closed submodule is mapped to a closed submodule, so the definitions are easier and behave nicely with `closure` and `⊔`. motivation: needed to define standard subspaces in a Hilbert space (scalar multiplication by `Complex.I`) #29251 https://ems.press/content/serial-article-files/48171 - [x] depends on: #29230 for `Lattice` `CompleteLattice` t-topology 69/1 Mathlib/Topology/Algebra/Module/ClosedSubmodule.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] fpvandoorn
assignee:fpvandoorn
none
13-17739
13 days ago
21-37553
21 days ago
21-39841
21 days
26720 vlad902
author:vlad902
feat(SimpleGraph): lemmas relating edges and darts to the support Useful lemmas to make it easier to pass between the support/edges/darts of a walk. - [ ] depends on: #25812 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 27/0 Mathlib/Combinatorics/SimpleGraph/Walk.lean 1 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
none
13-7990
13 days ago
22-37418
22 days ago
22-37497
22 days
29347 themathqueen
author:themathqueen
refactor(Algebra/Star/StarAlgHom): let `StarAlgEquiv` extend `StarRingEquiv` instead of `RingEquiv` Instead of having `StarAlgEquiv` extend `RingEquiv` and have properties `map_star'` and `map_smul'`, it now extends `StarRingEquiv` with only `map_smul'`. --- Will add more API in the next PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
29/36 Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean 2 5 ['github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'themathqueen'] kbuzzard
assignee:kbuzzard
none
12-21577
12 days ago
27-20920
27 days ago
29-43876
29 days
29626 themathqueen
author:themathqueen
chore(Algebra/Order/Module/PositiveLinearMap): generalize `OrderHomClass.ofLinear` Generalize `OrderHomClass.ofLinear` from linear maps to additive group homomorphisms. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra easy
label:t-algebra$
10/11 Mathlib/Algebra/Order/Module/PositiveLinearMap.lean,Mathlib/Analysis/CStarAlgebra/CompletelyPositiveMap.lean 2 5 ['Ruben-VandeVelde', 'github-actions', 'themathqueen'] Vierkantor
assignee:Vierkantor
none
11-8003
11 days ago
18-47562
18 days ago
20-25916
20 days
29656 jsm28
author:jsm28
feat(Geometry/Euclidean/Angle/Bisector): bisecting angles and equal distances Prove a lemma ```lean /-- A point `p` is equidistant to two affine subspaces if and only if the angles at a point `p'` in their intersection between `p` and its orthogonal projections onto the subspaces are equal. -/ lemma dist_orthogonalProjection_eq_iff_angle_eq {p p' : P} {s₁ s₂ : AffineSubspace ℝ P} [s₁.direction.HasOrthogonalProjection] [s₂.direction.HasOrthogonalProjection] (hp' : p' ∈ s₁ ⊓ s₂) : haveI : Nonempty s₁ := ⟨p', hp'.1⟩ haveI : Nonempty s₂ := ⟨p', hp'.2⟩ dist p (orthogonalProjection s₁ p) = dist p (orthogonalProjection s₂ p) ↔ ∠ p p' (orthogonalProjection s₁ p) = ∠ p p' (orthogonalProjection s₂ p) := by ``` that gives the basic fact relating equal distances to affine subspaces, and bisecting angles involving those subspaces, needed to connect `incenter` and `excenter` to bisecting angles. (Other pieces involved in getting such a statement for angles involving vertices of a triangle rather than just touchpoints include #29410, #29413, #29418 and their dependencies.) I expect the new file `Bisector.lean` to be an appropriate place to end up with actual definitions of bisectors as submodules and affine subspaces; those definitions aren't needed for my immediate goals with `incenter` and `excenter`, but it seems appropriate to use such a file for lemmas relating to bisectors whether or not they explicitly involve such definitions. I do expect to add similar statements involving oriented angles in a followup, so the imports of this new file should be expected to increase. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry 118/0 Mathlib.lean,Mathlib/Geometry/Euclidean/Angle/Bisector.lean 2 7 ['eric-wieser', 'github-actions', 'jsm28'] JovanGerb
assignee:JovanGerb
none
11-8001
11 days ago
19-8124
19 days ago
19-8103
19 days
29688 tb65536
author:tb65536
feat(FieldTheory/IsGaloisGroup): prove the Galois correspondence for `IsGaloisGroup` This PR reproves the Galois correspondence for `IsGaloisGroup`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
89/0 Mathlib/FieldTheory/Galois/IsGaloisGroup.lean 1 1 ['github-actions'] joneugster
assignee:joneugster
none
11-7999
11 days ago
18-22715
18 days ago
18-22694
18 days
29624 mcdoll
author:mcdoll
feat(LinearAlgebra/LinearPMap): add definition of resolvent and first resolvent identity --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
180/2 Mathlib/LinearAlgebra/LinearPMap.lean 1 2 ['github-actions', 'mcdoll'] kim-em
assignee:kim-em
none
10-21767
10 days ago
18-32718
18 days ago
18-32697
18 days
29715 ADedecker
author:ADedecker
feat: generalize `IsClosed.vadd_right_of_isCompact` to proper actions I realized a few weeks after adding them to Mathlib that the more conceptual approach for lemmas of the form "`s • t` is closed when one of `s` and `t` is closed and the other is compact" is that of proper maps and proper actions. This PR switches to this approach. More precisely: - I refactored the proof [IsClosed.smul_left_of_isCompact](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Algebra/Group/Pointwise.html#IsClosed.smul_left_of_isCompact) in terms of properness. The proof is essentially the same length, but conceptually simpler. - More importantly, I generalize [IsClosed.vadd_right_of_isCompact](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Algebra/Group/AddTorsor.html#IsClosed.vadd_right_of_isCompact) from topological torsors to proper actions. Note that I do not assume separation, which creates some troubles as compact sets are not closed... - To support the above, I introduce a bit more API on proper maps - I also moved `isProperMap_iff_isClosedMap_filter` to `Topology/Maps/Proper/UniversallyClosed`, together with the ultrafilter analog. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-topology 196/93 Mathlib/Topology/Algebra/Group/AddTorsor.lean,Mathlib/Topology/Algebra/Group/Pointwise.lean,Mathlib/Topology/Algebra/ProperAction/Basic.lean,Mathlib/Topology/Algebra/ProperAction/ProperlyDiscontinuous.lean,Mathlib/Topology/LocalAtTarget.lean,Mathlib/Topology/Maps/Proper/Basic.lean,Mathlib/Topology/Maps/Proper/UniversallyClosed.lean 7 2 ['ADedecker', 'github-actions'] grunweg
assignee:grunweg
none
10-7997
10 days ago
17-54014
17 days ago
17-54054
17 days
27817 zhuyizheng
author:zhuyizheng
feat: add IMO2025P1 Add a solution to IMO2025P1, the original problem statement from https://github.com/jsm28/IMOLean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO new-contributor 1310/0 Archive.lean,Archive/Imo/Imo2025Q1.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] dwrensha
assignee:dwrensha
none
9-57521
9 days ago
14-76993
14 days ago
47-15701
47 days
29322 xroblot
author:xroblot
feat(RingTheory/Localization/AtPrime): bijection between prime ideals Let `R ⊆ S` be an extension of rings and `p` be a prime ideal of `R`. Denote by `Rₚ` the localization of `R` at the complement of `p` and by `Sₚ` the localization of `S` at the (image) of the complement of `p`. In this PR, we study the extension `Rₚ ⊆ Sₚ` and the relation between the (nonzero) prime ideals of `Sₚ` and the prime ideals of `S` above `p`. In particular, we prove that (under suitable conditions) they are in bijection. In a following PR #27706, we prove that the residual degree and ramification index are preserved by this bijection. Note. The new file `RingTheory.Localization.AtPrime.Extension` is imported in `RingTheory.Trace.Quotient` because one function from the latter was moved to the former, but the plan is eventually to move the isomorphisms proved in `RingTheory.Trace.Quotient` to `RingTheory.Localization.AtPrime.Basic` and `RingTheory.Localization.AtPrime.Extension` where they belong. This will be done in #27706. --- t-ring-theory 145/8 Mathlib.lean,Mathlib/RingTheory/DedekindDomain/Instances.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/Localization/AtPrime/Extension.lean,Mathlib/RingTheory/Trace/Quotient.lean 6 1 ['github-actions'] chrisflav
assignee:chrisflav
none
9-54016
9 days ago
30-40132
1 month ago
30-40169
30 days
27244 xroblot
author:xroblot
feat(RingTheory/DedekindDomain): lifting an ideal in an extension is injective This PR develops some API for [FractionalIdeal.extendedHomₐ](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/FractionalIdeal/Extended.html#FractionalIdeal.extendedHom%E2%82%90) and in particular proves when it is an injective map. As a consequence, it deduces the fact that lifting an integral ideal in an extension of Dedekind domains is an injective map. Note: the import increase happens in a leaf file `Mathlib.RingTheory.FractionalIdeal.Extended` --- - [x] depends on: #28800 t-ring-theory large-import 140/8 Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/FractionalIdeal/Extended.lean,Mathlib/RingTheory/Localization/Basic.lean 3 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'xroblot'] kbuzzard
assignee:kbuzzard
none
9-53946
9 days ago
30-50914
1 month ago
66-55497
66 days
26396 xroblot
author:xroblot
feat(RingTheory): define the dual of a basis for the trace and prove basic properties Specialize the construction of `BilinForm.dualBasis` to the case of the trace and proves basic results about it. This will be useful for future works on the [Submodule.traceDual](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/DedekindDomain/Different.html#Submodule.traceDual) --- t-ring-theory 121/38 Mathlib/LinearAlgebra/BilinearForm/Properties.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/Trace/Basic.lean 3 3 ['github-actions', 'mathlib4-merge-conflict-bot'] adomani
assignee:adomani
none
9-53718
9 days ago
18-47020
18 days ago
99-14643
99 days
26155 xroblot
author:xroblot
feat(DedekindDomain/Different): add the transitivity formula This PR proves the transitivity formula for the different ideal. The PR also adds one new instance: - `FiniteDimensional (FractionRing A) (FractionRing B)` deduced from `Module.Finite A B` when `B` is a Dedekind domain. --- t-algebra
label:t-algebra$
177/10 Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/DedekindDomain/IntegralClosure.lean,Mathlib/RingTheory/FractionalIdeal/Extended.lean,Mathlib/RingTheory/Localization/Basic.lean 4 15 ['erdOne', 'github-actions', 'mathlib4-merge-conflict-bot', 'xroblot'] Vierkantor
assignee:Vierkantor
none
9-53682
9 days ago
29-69259
29 days ago
101-76109
101 days
28871 JaafarTanoukhi
author:JaafarTanoukhi
feat(Combinatorics/Digraph): Tournaments Define orientations and tournaments. Related to #26771. Co-authored-by: Rida Hamadani --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 62/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Orientation.lean,Mathlib/Combinatorics/Digraph/Tournament.lean 3 5 ['JaafarTanoukhi', 'NotWearingPants', 'Rida-Hamadani', 'github-actions'] kmill
assignee:kmill
1
9-37654
9 days ago
40-27891
1 month ago
40-27927
40 days
28967 utkuokur
author:utkuokur
refactor(Combinatorics/SimpleGraph/Walk): simplify proof of "support_tail_of_not_nil" The proof of the lemma named "support_tail_of_not_nil" is shortened. Since "support_tail" is not needed anymore, it is removed. @[deprecated (since := "2025-08-26")] sign is added for the removed "support_tail". The library references to "support_tail" are replaced with "support_tail_of_not_nil". To keep [@simp] on "cons_support_tail" and avoid the linter error, the [@simp] of "support_tail_of_not_nil" (previously on "support_tail") is removed. There might be a better way that I am missing, to deal with the linter error. --- Additionally, a merge conflict with `master` was resolved by keeping the generalized `support_tail_of_not_nil` and reintroducing `support_tail` as a deprecated alias for compatibility. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 7/10 Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Walk.lean 2 3 ['github-actions', 'mathlib4-merge-conflict-bot', 'themathqueen'] awainverse
assignee:awainverse
none
9-28968
9 days ago
25-23140
25 days ago
38-39054
38 days
27307 xyzw12345
author:xyzw12345
feat(RingTheory/GradedAlgebra): homogeneous relation This PR continues the work from #22279. Original PR: https://github.com/leanprover-community/mathlib4/pull/22279 t-ring-theory 391/0 Mathlib.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousRelation.lean 9 9 ['chrisflav', 'eric-wieser', 'github-actions', 'ocfnash', 'xyzw12345'] mattrobball
assignee:mattrobball
none
9-8001
9 days ago
60-34388
1 month ago
75-45705
75 days
28295 artie2000
author:artie2000
feat(Algebra/Order/Ring/Ordering): basic results about ring (pre)orderings * Basic automation for membership of ring orderings * Alternative constructors for ring preorderings and ring orderings * Basic results about ring preorderings and their supports, including the special case over a field --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #27282 maintainer-merge t-algebra
label:t-algebra$
203/0 Mathlib.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Order/Ring/Ordering/Basic.lean 3 57 ['Rob23oba', 'YaelDillies', 'artie2000', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vihdzp'] joneugster
assignee:joneugster
1
9-7999
9 days ago
16-74338
16 days ago
22-37474
22 days
29596 alreadydone
author:alreadydone
chore(Algebra): extract `Submonoid.IsLocalizationMap` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
282/119 Mathlib.lean,Mathlib/Algebra/Module/LocalizedModule/IsLocalization.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/Lemmas.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/RingTheory/Extension/Presentation/Submersive.lean,Mathlib/RingTheory/Localization/Defs.lean 7 3 ['github-actions', 'mathlib4-merge-conflict-bot'] kim-em
assignee:kim-em
none
9-7997
9 days ago
16-47954
16 days ago
20-60877
20 days
29723 Ruben-VandeVelde
author:Ruben-VandeVelde
feat: add TensorProduct.piScalarRight_symm_algebraMap --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) FLT t-algebra
label:t-algebra$
5/0 Mathlib/LinearAlgebra/TensorProduct/Pi.lean 1 3 ['Ruben-VandeVelde', 'github-actions', 'themathqueen'] joneugster
assignee:joneugster
none
9-7994
9 days ago
17-41891
17 days ago
17-41927
17 days
27229 WilliamCoram
author:WilliamCoram
feat(GroupTheory/DoubleCoset): multiple lemmas From FLT --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory FLT new-contributor 97/0 Mathlib/GroupTheory/DoubleCoset.lean 1 16 ['Ruben-VandeVelde', 'WilliamCoram', 'github-actions', 'mathlib4-merge-conflict-bot'] mariainesdff
assignee:mariainesdff
none
8-59034
8 days ago
15-34679
15 days ago
74-14156
74 days
29411 llllvvuu
author:llllvvuu
feat(LinearAlgebra/Matrix/Rank): rank factorization The rank factorization derived from `Module.finBasis`. Co-authored-by: Aristotle Harmonic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
20/0 Mathlib/LinearAlgebra/Matrix/Rank.lean,Mathlib/LinearAlgebra/Matrix/ToLin.lean 2 1 ['github-actions'] jcommelin
assignee:jcommelin
none
8-37708
8 days ago
26-20636
26 days ago
26-20631
26 days
29275 wwylele
author:wwylele
feat(GroupTheory): add DivisibleHull This is part of Hahn embedding theorem #27268, where an a ordered group is first embedded in a divisible group / Q-module. I am aware at #25662 there is also an ongoing rewrite of `LocalizedModule` that this PR uses. Hopefully I avoided interfering it by using mostly with public API. --- - [x] depends on: #29277 - [x] depends on: #29388 - [x] depends on: #29386 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory maintainer-merge 451/3 Mathlib.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/PNat.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Pow.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/GroupTheory/DivisibleHull.lean 6 106 ['YaelDillies', 'github-actions', 'mathlib4-dependent-issues-bot', 'vihdzp', 'wwylele'] tb65536
assignee:tb65536
2
8-7999
8 days ago
15-33876
15 days ago
25-11078
25 days
29488 Timeroot
author:Timeroot
feat: 'said' tactic Functionally similar to `says`, but explicitly not for checking output or even saying there ever was output. `X said Y` just means that `X` was part of the process for (a human, or machine, or both) to generate `Y`. Based on this [#mathlib4 > noisy simp says in CI @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/noisy.20simp.20says.20in.20CI/near/538443152) Zulip discussion --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 40/0 Mathlib/Tactic/Linter/UnusedTactic.lean,Mathlib/Tactic/Linter/UnusedTacticExtension.lean,Mathlib/Tactic/Says.lean,MathlibTest/says.lean 4 3 ['JovanGerb', 'MichaelStollBayreuth', 'github-actions'] JovanGerb
assignee:JovanGerb
none
8-7998
8 days ago
15-66372
15 days ago
23-85921
23 days
29765 YaelDillies
author:YaelDillies
feat: commutative monoids are internal monoids From Toric --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) toric t-category-theory 76/6 Mathlib/CategoryTheory/Monoidal/Cartesian/Grp_.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Mon_.lean 2 3 ['YaelDillies', 'eric-wieser', 'github-actions'] kim-em
assignee:kim-em
none
8-7994
8 days ago
15-70957
15 days ago
15-70992
15 days
29769 Vierkantor
author:Vierkantor
CI: run a weekly linter workflow This PR adds a workflow analogous to the nightly regression lints, that reports possible refactors using the tactic analysis framework. Those would be too noisy or take too much time to run in regular CI. As a first linter, we have the `mergeWithGrind` linter that reports when a sequence of tactics followed by `grind` can become just `grind`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 102/1 .github/workflows/weekly-lints.yml,Mathlib/Init.lean 2 1 ['github-actions'] bryangingechen
assignee:bryangingechen
none
8-7993
8 days ago
15-58902
15 days ago
15-58881
15 days
29771 Vierkantor
author:Vierkantor
refactor(TacticAnalysis): use full CommandElabM context in test Running the `rwMerge` linter on the whole of Mathlib reveals that the tactic analysis framework did not always correctly pass the environment to the test step of a pass. By running the test in a full `CommandElabM` and adding a `ContextInfo` and `TacticInfo`, we can access the right environment (using the `ctxI.runTacticCode` function). There are still a few subtle issues to do with notation but I would like to get this fix in first, since it involves some larger refactors. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 44/17 Mathlib/Tactic/TacticAnalysis.lean,Mathlib/Tactic/TacticAnalysis/Declarations.lean,MathlibTest/TacticAnalysis.lean 3 7 ['adomani', 'bryangingechen', 'github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] kim-em
assignee:kim-em
none
8-7992
8 days ago
15-41918
15 days ago
15-58448
15 days
29556 joelriou
author:joelriou
feat(CategoryTheory): canonical colimits Given a functor `F : C ⥤ D` and `Y : D`, we say that `Y` is a canonical colimit relatively to `F` is `Y` identifies to the colimit of all `F.obj X` for `X : C` and `f : F.obj X ⟶ Y`, i.e. `Y` identifies to the colimit of the obvious functor `CostructuredArrow F Y ⥤ D` (see definitions `canonicalCocone` and `CanonicalColimit`). We introduce the corresponding property `isCanonicalColimit F` of objects of `D`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 72/0 Mathlib.lean,Mathlib/CategoryTheory/Limits/Canonical.lean 2 2 ['github-actions', 'joelriou'] joneugster
assignee:joneugster
none
7-64434
7 days ago
22-55175
22 days ago
22-55153
22 days
29164 vlad902
author:vlad902
feat(SimpleGraph): Hall's Marriage Theorem for bipartite graphs Derive the graph theoretic proof of Hall's marriage theorem from the combinatorial version. Note that I specifically implement this for the more general case of infinite graphs that are locally finite (e.g. every vertex has only finite neighbors.) As a result, the theorem depends on some category theoretic infrastructure required for the infinite combinatorial formulation of Hall's Marriage Theorem and hence I've placed the theorems into their own file to avoid requiring it in `Matching.lean` - [ ] depends on: #29162 t-combinatorics 128/7 Mathlib.lean,Mathlib/Combinatorics/Hall/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Hall.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean,docs/1000.yaml 5 2 ['github-actions', 'mathlib4-dependent-issues-bot'] b-mehta
assignee:b-mehta
none
7-8008
7 days ago
19-83408
19 days ago
20-234
20 days
29328 vlad902
author:vlad902
feat(SimpleGraph): graph isomorphism preserves `IsAcyclic`/`IsTree` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 21/2 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 2 ['github-actions', 'themathqueen'] b-mehta
assignee:b-mehta
none
7-8007
7 days ago
30-26427
1 month ago
30-26449
30 days
29823 themathqueen
author:themathqueen
feat(Algebra/Group/Submonoid): add `(Add)Submonoid.closure_pi` This generalizes and moves some proofs from subgroups to submonoids in order to add `(Add)Submonoid.closure_pi`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
86/45 Mathlib.lean,Mathlib/Algebra/Group/Subgroup/Finite.lean,Mathlib/Algebra/Group/Submonoid/Finite.lean 3 6 ['eric-wieser', 'github-actions', 'themathqueen'] dagurtomas
assignee:dagurtomas
none
7-8001
7 days ago
14-18405
14 days ago
14-18447
14 days
29538 YaelDillies
author:YaelDillies
refactor(FractionalIdeal): use algebraic order theory API Instantiate instances earlier and use generic lemmas instead of the `FractionalIdeal`-specific ones. Also rename `_nonzero` in lemma names to `_ne_zero`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 158/176 Mathlib/NumberTheory/NumberField/CanonicalEmbedding/Basic.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/DedekindDomain/Factorization.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Basic.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/FractionalIdeal/Basic.lean,Mathlib/RingTheory/FractionalIdeal/Inverse.lean,Mathlib/RingTheory/FractionalIdeal/Operations.lean 8 1 ['github-actions'] chrisflav
assignee:chrisflav
none
6-7987
6 days ago
19-50097
19 days ago
19-50083
19 days
29693 kckennylau
author:kckennylau
feat(RingTheory): make Euclidean domain from DVR --- Zulip: https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Leading.20term.20of.20valuation/near/539666529 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory maintainer-merge 82/0 Mathlib/RingTheory/DiscreteValuationRing/Basic.lean 1 6 ['github-actions', 'kckennylau', 'pechersky'] chrisflav
assignee:chrisflav
1
6-7986
6 days ago
17-48607
17 days ago
18-8110
18 days
29791 llllvvuu
author:llllvvuu
feat(Order): lemmas about `iSupIndep` * generalize `Finset.SupIndep` "bind" operations from `DistribLattice` to `IsModularLattice` * new lemma `iSupIndep.iInf` * more characterizations of `iSupIndep` on submodules: * `iSupIndep_iff_finset_sum_eq_zero_imp_eq_zero` * `iSupIndep_iff_finset_sum_eq_imp_eq` * add `@[simp]` and `@[grind]` attributes which were helpful for these proofs Original motivation was to have the following fact: ```lean theorem iSupIndep_iInf_genEigenspace [NoZeroSMulDivisors R M] {α : Type*} (f : α → End R M) (k : ℕ∞) : iSupIndep fun μ : α → R ↦ ⨅ a : α, ((f a).genEigenspace (μ a)) k := .iInf (f · |>.genEigenspace · k) (f · |>.independent_genEigenspace k) ``` Co-authored-by: Aristotle Harmonic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 166/62 Mathlib/Data/Finset/Disjoint.lean,Mathlib/Data/Finset/Lattice/Fold.lean,Mathlib/Data/Finset/Lattice/Union.lean,Mathlib/Data/Finset/Sigma.lean,Mathlib/GroupTheory/Perm/Cycle/Factors.lean,Mathlib/LinearAlgebra/DFinsupp.lean,Mathlib/LinearAlgebra/Eigenspace/Basic.lean,Mathlib/Logic/Embedding/Basic.lean,Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/Order/Partition/Finpartition.lean,Mathlib/Order/SupIndep.lean 11 12 ['github-actions', 'leanprover-bot', 'llllvvuu'] bryangingechen
assignee:bryangingechen
none
6-7986
6 days ago
14-4575
14 days ago
14-28196
14 days
29512 grunweg
author:grunweg
feat: check for PR titles which do not start with "feat" etc. We ignore draft PRs and PRs with the WIP label. The set of checks is intentionally kept small, and could be expanded in the future. --- More basic version of #16303: given that mathlib's statistics will use the PR kind, let's make sure PR kinds are somewhat appropriate. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 365/0 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/ValidatePRTitle.lean,lakefile.lean,scripts/README.md,scripts/check_title_labels.lean 10 17 ['bryangingechen', 'eric-wieser', 'github-actions', 'grunweg'] bryangingechen
assignee:bryangingechen
none
5-75923
5 days ago
23-38358
23 days ago
23-38336
23 days
27599 mitchell-horner
author:mitchell-horner
feat(Combinatorics/SimpleGraph): define `CompleteEquipartiteSubgraph` Define the complete equipartite subgraphs in `r` parts each of size `t` in `G` as the `r` subsets of vertices each of size `t` such that vertices in distinct subsets are adjacent. In this case `Nonempty (G.CompleteEquipartiteSubgraph r t)` is equivalent to `completeEquipartiteGraph r t ⊑ G`, that is, finding `r` subsets of vertices each of size `t` in `G` such that vertices in distinct subsets are adjacent is equivalent to finding an injective homomorphism from `completeEquipartiteGraph r t` to `G`. --- - [x] depends on: #27597 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 113/7 Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean 1 19 ['YaelDillies', 'b-mehta', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'mitchell-horner'] YaelDillies
assignee:YaelDillies
none
5-64656
5 days ago
30-43769
1 month ago
39-1107
39 days
25843 mitchell-horner
author:mitchell-horner
feat(Combinatorics/SimpleGraph): define `between` subgraphs The simple graph `G.between s t` is the subgraph of `G` containing edges that connect a vertex in the set `s` to a vertex in the set `t`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24948.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24948* t-combinatorics 86/0 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean 1 1 ['github-actions'] b-mehta
assignee:b-mehta
none
5-64644
5 days ago
112-48756
3 months ago
112-48733
112 days
27602 mitchell-horner
author:mitchell-horner
feat(Combinatorics/SimpleGraph): define `CompleteBipartiteSubgraph` Define the complete bipartite subgraphs of `s` and `t` parts as a "left" subset of `s` vertices and a "right" subset of `t` vertices such that every vertex in the "left" subset is adjacent to every vertex in the "right" subset. In this case `Nonempty (G.CompleteBipartiteSubgraph (card α) (card β))` is equivalent to `completeBipartiteGraph α β ⊑ G`, that is, finding a "left" subset of `s` vertices and a "right" subset of `t` vertices such that every vertex in the "left" subset is adjacent to every vertex in the "right" subset is equivalent to finding an injective homomorphism `completeBipartiteGraph α β` to `G`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 88/0 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean 1 3 ['github-actions', 'mitchell-horner', 'vlad902'] YaelDillies
assignee:YaelDillies
none
5-64618
5 days ago
67-33992
2 months ago
67-34036
67 days
29361 FlAmmmmING
author:FlAmmmmING
feat: Catalan generating function as a formal power series We introduce the Catalan generating function as a formal power series over `ℕ`. ## Main Definitions * `PowerSeries.catalanSeries`: The Catalan generating function as a power series. ## Main Results * `PowerSeries.sum_coeff_X_catalanSeries`: When `n` is a natural number, each term in the sum `coeff i X * catalan (n - i)` is 0 except for `i = 1`. * `PowerSeries.coeff_X_mul_catalanSeries`: The coefficient of `X * catalanSeries` at `X^n` is `catalan (n - 1)` when `n > 0`. * `PowerSeries.catalanSeries_one_add_X_mul_self_sq`: The Catalan generating function satisfies the equation `catalanSeries = 1 + X * catalanSeries ^ 2`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor 71/0 Mathlib.lean,Mathlib/RingTheory/PowerSeries/Catalan.lean 2 4 ['Ruben-VandeVelde', 'github-actions', 'wwylele'] kbuzzard
assignee:kbuzzard
none
5-36686
5 days ago
28-67077
28 days ago
28-67109
28 days
29652 fmortimore
author:fmortimore
feat(Order): the Bourbaki–Witt theorem We prove the Bourbaki-Witt theorem, one of Wiedijk's 1000+ theorems --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order 231/0 Mathlib.lean,Mathlib/Order/BourbakiWitt.lean,docs/1000.yaml 3 7 ['eric-wieser', 'fmortimore', 'github-actions', 'wwylele'] Vierkantor
assignee:Vierkantor
none
5-23195
5 days ago
19-19925
19 days ago
19-19958
19 days
29369 vlad902
author:vlad902
feat(SimpleGraph): `IsSubwalk` of common Walk decompositions Add some helper lemmas to show that decompositions of walks are sub-walks. t-combinatorics 61/17 Mathlib/Combinatorics/SimpleGraph/Connectivity/WalkDecomp.lean,Mathlib/Combinatorics/SimpleGraph/Walk.lean 2 1 ['github-actions'] awainverse
assignee:awainverse
none
5-8000
5 days ago
28-33477
28 days ago
28-33522
28 days
29376 vlad902
author:vlad902
feat(SimpleGraph): Helper lemmas for `Walk.IsSubwalk` t-combinatorics 29/0 Mathlib/Combinatorics/SimpleGraph/Walk.lean 1 1 ['github-actions'] awainverse
assignee:awainverse
none
5-7999
5 days ago
27-72099
27 days ago
27-72135
27 days
29758 NotWearingPants
author:NotWearingPants
feat(RingTheory/RootsOfUnity): exp(pi * i * q) is a root of unity for rational q --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor 32/1 Mathlib/RingTheory/RootsOfUnity/Complex.lean 1 5 ['NotWearingPants', 'Ruben-VandeVelde', 'github-actions', 'kckennylau'] chrisflav
assignee:chrisflav
none
5-7998
5 days ago
15-12814
15 days ago
15-19816
15 days
29121 Ruben-VandeVelde
author:Ruben-VandeVelde
feat: MvPolynomial.symmetricSubalgebra.{aevalMultiset,sumPolynomial} --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 192/0 Mathlib.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/Eval.lean 2 1 ['github-actions'] chrisflav
assignee:chrisflav
none
4-68938
4 days ago
35-7665
1 month ago
35-7700
35 days
29735 vihdzp
author:vihdzp
feat: order instances on quotients We define a `Preorder (Quotient s)` instance in the natural way, and prove that it can be strengthened to a `LinearOrder` when all equivalence classes are `OrdConnected`. --- See [Zulip](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Quotient.20of.20linear.20order.20is.20linear.20order/near/539915988) for some long-winded discussion about this. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 125/0 Mathlib.lean,Mathlib/Order/Quotient.lean 2 3 ['github-actions', 'plp127'] bryangingechen
assignee:bryangingechen
none
4-51193
4 days ago
16-78642
16 days ago
16-78678
16 days
27742 ChrisHughes24
author:ChrisHughes24
feat(Nat/nth): inequalities about Nat.nth --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 51/0 Mathlib/Data/Nat/Nth.lean 1 3 ['ChrisHughes24', 'github-actions'] pechersky
assignee:pechersky
none
4-7997
4 days ago
64-58415
2 months ago
64-58455
64 days
27864 BoltonBailey
author:BoltonBailey
feat(Data/{Finset,Multiset}/Sort): give sort functions ≤ default argument Changes the `Finset.sort` and `Multiset.sort` functions to take `≤` as the default relation argument. Then removes this argument where possible through the rest of the library. This involves switching the order of arguments, but I think this is fine, as this function is mostly called by dot notation anyway, and I think it is more typical for the first argument of such functions to have the type that matches the namespace. Thanks to @eric-wieser for suggesting this approach Zulip discussion: [#mathlib4 > Redefine {Fin/Multi}set.sort to take linear order?](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Redefine.20.7BFin.2FMulti.7Dset.2Esort.20to.20take.20linear.20order.3F/with/532398325) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 121/97 Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Data/Finset/Sort.lean,Mathlib/Data/Multiset/Sort.lean,Mathlib/Data/Nat/Nth.lean,Mathlib/GroupTheory/Perm/Cycle/Factors.lean,Mathlib/GroupTheory/Perm/Sign.lean,Mathlib/Logic/Equiv/Finset.lean,Mathlib/Logic/Equiv/Multiset.lean,Mathlib/NumberTheory/ADEInequality.lean 9 5 ['BoltonBailey', 'eric-wieser', 'github-actions', 'grunweg'] pechersky
assignee:pechersky
none
4-7996
4 days ago
62-42725
2 months ago
63-9859
63 days
27991 sinianluoye
author:sinianluoye
feat (Rat): add Rat.den_eq_of_add_den_eq_one and its dependent lemmas ```lean4 example {q r : ℚ} (h : (q + r).den = 1) : q.den = r.den := by ``` It is so simple, but I couldn't find it in current mathlib repo. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 28/0 Mathlib/Data/Rat/Lemmas.lean 1 14 ['github-actions', 'sinianluoye', 'themathqueen'] pechersky
assignee:pechersky
none
4-7995
4 days ago
59-7582
1 month ago
59-35630
59 days
28077 ShreckYe
author:ShreckYe
feat(Data/Finset/Card): add some more Pigeonhole Principle theorems `exists_ne_map_eq_of_card_image_lt` and `not_injOn_of_card_image_lt` `exists_ne_map_eq_of_card_image_lt` is a special case of `exists_ne_map_eq_of_card_lt_of_maps_to` where `t` is `s.image f`, and `not_injOn_of_card_image_lt` is its variant using `Set.InjOn`. I ran into some cases where such theorems would save me some time. t-data new-contributor 10/0 Mathlib/Data/Finset/Card.lean 1 4 ['ShreckYe', 'github-actions', 'themathqueen'] pechersky
assignee:pechersky
none
4-7994
4 days ago
57-60472
1 month ago
57-60514
57 days
28119 JasperMS
author:JasperMS
feat(Data/Set/Pairwise): prove pairwise results for Chains, move `Set.pairwise_iUnion₂` Initiate a new file `Data/Set/Pairwise/Chain.lean` which makes some `Pairwise` results available to the `IsChain` predicate. In the process, move `Set.pairwise_iUnion₂` to group it with similar results. Perform some variable harmonization. Part of Carleson, original result by Edward van de Meent. Moves: - Set.pairwise_iUnion₂: from Data.Set.Lattice to Data.Set.Pairwise.Lattice --- This PR was discussed and advice was given in [#mathlib4 > Novice questions on style and structure](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Novice.20questions.20on.20style.20and.20structure/with/533462814). Many thanks to those who helped me out! Mathlib PRs are still new to me, so please point out where I can improve! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) carleson t-data new-contributor 56/12 Mathlib.lean,Mathlib/Data/Set/Lattice.lean,Mathlib/Data/Set/Pairwise/Chain.lean,Mathlib/Data/Set/Pairwise/Lattice.lean 4 11 ['JasperMS', 'Ruben-VandeVelde', 'edegeltje', 'github-actions'] pechersky
assignee:pechersky
none
4-7993
4 days ago
56-47197
1 month ago
56-47634
56 days
29351 staroperator
author:staroperator
feat(SetTheory/Cardinal): generalize and rename theorems on `Cardinal.sum` Some theorems on `Cardinal.sum f` are taking `f : ι → Cardinal.{max u v}`, which can be generalized to `f : ι → Cardinal.{v}`. Also rename `sum_le_iSup_lift`, `sum_lt_lift_of_isRegular`, `sum_eq_iSup_lift` etc. to reflect their signatures in names. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 79/36 Mathlib/Data/W/Cardinal.lean,Mathlib/ModelTheory/Encoding.lean,Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Cardinal/Defs.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/SetTheory/Cardinal/Ordinal.lean,Mathlib/SetTheory/Cardinal/Pigeonhole.lean,Mathlib/SetTheory/Cardinal/Regular.lean 10 5 ['github-actions', 'staroperator', 'vihdzp'] alreadydone
assignee:alreadydone
1
4-7991
4 days ago
29-14059
29 days ago
29-33248
29 days
29365 staroperator
author:staroperator
feat(SetTheory/ZFC): add `ZFSet.card` The same as `ZFSet.rank`, we define `ZFSet.card` as `ZFSet.{u} → Cardinal.{u}` and prove some basic properties. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 123/4 Mathlib.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Cardinal.lean 4 2 ['github-actions', 'staroperator', 'vihdzp'] YaelDillies
assignee:YaelDillies
1
4-7990
4 days ago
28-54689
28 days ago
28-54726
28 days
29237 harahu
author:harahu
doc: capitalize archimedean Adjectives derived from people's last names are usually capitalized in English. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 332/331 Counterexamples/MapFloor.lean,Mathlib/Algebra/ContinuedFractions/Computation/ApproximationCorollaries.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/Archimedean/Hom.lean,Mathlib/Algebra/Order/Archimedean/Submonoid.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Hom/Basic.lean,Mathlib/Algebra/Order/Module/Archimedean.lean,Mathlib/Algebra/Order/Nonneg/Floor.lean,Mathlib/Algebra/Order/Ring/Archimedean.lean,Mathlib/Algebra/Order/Ring/Basic.lean,Mathlib/Algebra/Order/Ring/IsNonarchimedean.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Normed/Algebra/Ultra.lean,Mathlib/Analysis/Normed/Field/Ultra.lean,Mathlib/Analysis/Normed/Group/Seminorm.lean,Mathlib/Analysis/Normed/Group/Ultra.lean,Mathlib/Analysis/Normed/Order/Hom/Basic.lean,Mathlib/Analysis/Normed/Order/Hom/Ultra.lean,Mathlib/Analysis/Normed/Ring/Ultra.lean,Mathlib/Analysis/Normed/Unbundled/FiniteExtension.lean,Mathlib/Analysis/Normed/Unbundled/InvariantExtension.lean,Mathlib/Analysis/Normed/Unbundled/SeminormFromBounded.lean,Mathlib/Analysis/Normed/Unbundled/SeminormFromConst.lean,Mathlib/Analysis/Normed/Unbundled/SmoothingSeminorm.lean,Mathlib/Analysis/Normed/Unbundled/SpectralNorm.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Deligne.lean,Mathlib/Data/Int/SuccPred.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Nat/SuccPred.lean,Mathlib/Data/Real/Embedding.lean,Mathlib/GroupTheory/Archimedean.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/NumberTheory/FunctionField.lean,Mathlib/NumberTheory/LSeries/DirichletContinuation.lean,Mathlib/NumberTheory/NumberField/FinitePlaces.lean,Mathlib/NumberTheory/Ostrowski.lean,Mathlib/NumberTheory/Padics/Complex.lean,Mathlib/NumberTheory/Padics/MahlerBasis.lean,Mathlib/NumberTheory/Padics/PadicIntegers.lean,Mathlib/NumberTheory/Padics/PadicNorm.lean,Mathlib/NumberTheory/Padics/ValuativeRel.lean,Mathlib/Order/Filter/AtTopBot/Archimedean.lean,Mathlib/Order/Interval/Finset/Box.lean,Mathlib/Order/SuccPred/Archimedean.lean,Mathlib/Order/SuccPred/Basic.lean,Mathlib/Order/SuccPred/IntervalSucc.lean,Mathlib/Order/SuccPred/LinearLocallyFinite.lean,Mathlib/Order/SuccPred/Tree.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/HahnSeries/Lex.lean,Mathlib/RingTheory/Valuation/Archimedean.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/Topology/Algebra/InfiniteSum/Nonarchimedean.lean,Mathlib/Topology/Algebra/Nonarchimedean/AdicTopology.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/Basic.lean,Mathlib/Topology/Algebra/Nonarchimedean/Completion.lean,Mathlib/Topology/Algebra/Nonarchimedean/TotallyDisconnected.lean,Mathlib/Topology/Algebra/OpenSubgroup.lean,Mathlib/Topology/Algebra/Order/Archimedean.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean,Mathlib/Topology/Connected/Basic.lean,Mathlib/Topology/MetricSpace/BundledFun.lean,Mathlib/Topology/MetricSpace/Ultra/Basic.lean,Mathlib/Topology/MetricSpace/Ultra/Pi.lean,Mathlib/Topology/MetricSpace/Ultra/TotallySeparated.lean,Mathlib/Topology/UniformSpace/Ultra/Basic.lean,Mathlib/Topology/UniformSpace/Ultra/Completion.lean,Mathlib/Topology/UniformSpace/Ultra/Constructions.lean 73 5 ['euprunin', 'github-actions', 'mathlib4-merge-conflict-bot'] dwrensha
assignee:dwrensha
1
3-56521
3 days ago
18-62735
18 days ago
29-63881
29 days
29257 harahu
author:harahu
doc: attach "pre", "pseudo", "semi" and "sub" as a prefixes where they are now free-standing These are all examples of [bound morphemes](https://en.wikipedia.org/wiki/Bound_and_free_morphemes) and should be attached, either in closed form or by hyphen, to some other construct. Whether to write the resulting words with a hyphen or in closed form is a stylistic choice and I am open to discussing the specifics. I've made choices based on existing literature and what I personally found natural. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 50/50 Mathlib/Algebra/Star/NonUnitalSubsemiring.lean,Mathlib/Analysis/Matrix.lean,Mathlib/Analysis/Normed/Field/WithAbs.lean,Mathlib/Analysis/Normed/Group/BallSphere.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Lean/Meta/KAbstractPositions.lean,Mathlib/Lean/Meta/RefinedDiscrTree/Initialize.lean,Mathlib/MeasureTheory/Measure/Regular.lean,Mathlib/Probability/Martingale/BorelCantelli.lean,Mathlib/Topology/EMetricSpace/Basic.lean,Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/Gluing.lean,Mathlib/Topology/MetricSpace/IsometricSMul.lean,Mathlib/Topology/MetricSpace/ProperSpace.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean,Mathlib/Topology/MetricSpace/ThickenedIndicator.lean,Mathlib/Topology/MetricSpace/Thickening.lean,Mathlib/Topology/Metrizable/Basic.lean,Mathlib/Topology/Metrizable/Uniformity.lean,scripts/autolabel.lean 21 1 ['euprunin', 'github-actions'] JovanGerb
assignee:JovanGerb
1
3-55256
3 days ago
31-30358
1 month ago
31-30398
31 days
29341 joelriou
author:joelriou
feat(Topology): the topology generated by a family of spaces Some categories of topological spaces are "convenient" in the sense that they have nice categorical properties (e.g. they have limits, colimits and are cartesian closed). This PR is the first in a series towards showing that delta generated spaces form a cartesian closed monoidal category (see https://github.com/joelriou/topcat-model-category/blob/852a514c1d955ab586507bcd5a7b5efb99c6c3df/TopCatModelCategory/Convenient/CartesianClosed.lean#L92 for the general result), and this result is part of my formalization effort towards the Quillen model category structure on simplicial sets. In this PR, given a family `X` of topological spaces, and a topological space `Y`, we introduce the `X`-generated topology on `Y`, which is coinduced by all continuous maps `X i → Y`. (Eventually, this will generalize previous works by Dagur Asgeirsson and Ben Eltschig about compactly/delta generated spaces in mathlib. At some point, their definitions will be refactored as particular cases of the definitions in this PR series.) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 291/0 Mathlib.lean,Mathlib/Topology/Convenient/GeneratedBy.lean,docs/references.bib 3 10 ['github-actions', 'joelriou', 'peabrainiac'] jcommelin
assignee:jcommelin
none
3-37582
3 days ago
29-63650
29 days ago
29-63628
29 days
29772 ScottCarnahan
author:ScottCarnahan
feat (RingTheory/HahnSeries/Multiplication): Add group instances to HahnModule This PR adds `Zero` and `AddCommGroup` instances to `HahnModule` when appropriate. We also add comparison lemmas for subtraction in the `AddCommGroup` case, and reorganize some `variables`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 18/9 Mathlib/RingTheory/HahnSeries/Multiplication.lean 1 1 ['github-actions'] erdOne
assignee:erdOne
none
3-7980
3 days ago
15-56166
15 days ago
15-56202
15 days
29781 chrisflav
author:chrisflav
feat(RingTheory/Finiteness): a finite and finitely presented algebra is finitely presented We show that if `S` is finite as a module over `R` and finitely presented as an algebra over `R`, then it is finitely presented as a module over `R`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 357/36 Mathlib.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Basic.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Finiteness/ModuleFinitePresentation.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/Polynomial/Quotient.lean 9 1 ['github-actions'] erdOne
assignee:erdOne
none
3-7979
3 days ago
15-36648
15 days ago
15-36628
15 days
27073 pechersky
author:pechersky
feat(Archive/Examples/Local): files showcasing properties of local fields for p-adics, completions of number fields, laurent series, and fraction rings of witt vectors Should get filled in as more data/instances are declared --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory 139/0 Archive.lean,Archive/Examples/Local/Laurent.lean,Archive/Examples/Local/NumberField.lean,Archive/Examples/Local/Padic.lean,Archive/Examples/Local/Witt.lean 5 6 ['faenuccio', 'github-actions', 'mathlib4-merge-conflict-bot', 'riccardobrasca'] riccardobrasca
assignee:riccardobrasca
none
2-60721
2 days ago
26-33991
26 days ago
77-50756
77 days
29306 YaelDillies
author:YaelDillies
chore(GroupTheory/GroupAction/Basic): don't import `Module` This is useful to be able to replace `NoZeroSMulDivisors` with `Module.IsTorsionFree` later. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
16/17 Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/LinearAlgebra/Projectivization/Cardinality.lean 2 8 ['YaelDillies', 'eric-wieser', 'github-actions', 'riccardobrasca'] eric-wieser
assignee:eric-wieser
none
2-59764
2 days ago
26-71585
26 days ago
30-32930
30 days
29300 Louddy
author:Louddy
feat: SkewPolynomial ## Univariate skew polynomials Skew polynomials are represented as `SkewMonoidAlgebra R (Multiplicative ℕ)`, where `R` is usually at least a Semiring. In this file, we define `SkewPolynomial` and provide basic instances. The point if this PR is to introduce the very most basic definitions and API. From #23949. Co-authored-by: María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)> --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
178/0 Mathlib.lean,Mathlib/Algebra/SkewPolynomial/Basic.lean,docs/references.bib 3 1 ['github-actions'] riccardobrasca
assignee:riccardobrasca
none
2-59702
2 days ago
30-59790
1 month ago
30-59817
30 days
26332 Timeroot
author:Timeroot
feat(ModelTheory/Definability): TermDefinable functions This PR continues the work from #23506. Original PR: https://github.com/leanprover-community/mathlib4/pull/23506 t-logic 145/0 Mathlib/Data/Rel.lean,Mathlib/ModelTheory/Definability.lean,scripts/noshake.json 3 28 ['Timeroot', 'github-actions', 'mathlib4-merge-conflict-bot', 'staroperator'] fpvandoorn
assignee:fpvandoorn
1
2-48897
2 days ago
18-39982
18 days ago
100-1771
100 days
26757 fweth
author:fweth
feat(CategoryTheory/Topos): define elementary topos This commit begins the formalization of the notion of an *elementary topos*, following the definition in \[Mac Lane & Moerdijk, *Sheaves in Geometry and Logic* (1992), Ch. IV, Section 1]. It introduces the file `Mathlib/CategoryTheory/Topos/Basic.lean`, which currently includes: * The definition of an elementary topos. * Proof that the power object map is a functor * Theorem about pullbacks of characterstic maps Subobject classifiers, which are used in the definition, have already been defined in `CategoryTheory/Topos/Classifier.lean` Work in progress: further formalization of the section is planned. Questions: * Should the definition of power objects be separated into its own file/module, perhaps under `CategoryTheory/Topos/PowerObject.lean`? * Is the notation `P` / `P_morph` / `P_functor` for the power object functor on objects / morphisms / total acceptable? * Should the comments and docstrings rather use the notation from the book, where `g ∘ f` denotes arrow composition from righ to left, or the Lean variant `f ≫ g`? Klaus Gy klausgy@gmail.com --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory 391/68 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 14 ['fweth', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] joelriou
assignee:joelriou
none
2-8012
2 days ago
26-45175
26 days ago
46-17338
46 days
29713 jessealama
author:jessealama
feat (Algebra/Homology): add Euler–Poincaré formula This PR adds the Euler characteristic for chain complexes and proves the Euler-Poincaré formula relating the alternating sum of chain dimensions to the alternating sum of homology dimensions. ### Main definitions (in `EulerCharacteristic.lean`) * `ChainComplex.boundedEulerChar`: The Euler characteristic over a finite set * `ChainComplex.eulerChar`: The Euler characteristic as an infinite sum * `ChainComplex.homologyBoundedEulerChar`: The homological Euler characteristic over a finite set * `ChainComplex.homologyEulerChar`: The homological Euler characteristic as an infinite sum Both bounded and infinite definitions work with ℤ-indexed complexes over any ring R. The file also includes theorems relating the formally infinite sums to finite sums when there is finite support: * `ChainComplex.eulerChar_eq_boundedEulerChar`: The infinite Euler characteristic equals the bounded one when the chain complex vanishes outside a finite set * `ChainComplex.homologyEulerChar_eq_homologyBoundedEulerChar`: The infinite homological Euler characteristic equals the bounded one when homology vanishes outside a finite set ### Main result (in `EulerPoincare.lean`) * `ChainComplex.eulerChar_eq_homology_eulerChar`: For ℤ-indexed bounded chain complexes of finite-dimensional modules over a division ring, the alternating sum of chain dimensions equals the alternating sum of homology dimensions. --- Related to: #29639, #29643, #29646 new-contributor t-algebra
label:t-algebra$
444/0 Mathlib.lean,Mathlib/Algebra/Homology/EulerCharacteristic.lean,Mathlib/Algebra/Homology/EulerPoincare.lean 3 19 ['github-actions', 'jessealama', 'joelriou', 'kim-em'] dagurtomas
assignee:dagurtomas
none
1-73011
1 day ago
16-46797
16 days ago
17-56648
17 days
26923 oliver-butterley
author:oliver-butterley
feat(Dynamics/BirkhoffSum): add the pointwise ergodic theorem (Birkhoff's) The Pointwise Ergodic Theorem, also known as Birkhoff's Ergodic Theorem. Co-authored-by: Lua Viana Reis - [x] depends on: #26074 - [x] depends on: #26807 - [x] depends on: #26810 - [x] depends on: #26840 - [x] depends on: #26842 - [x] depends on: #26848 - [x] depends on: #26851 - [x] depends on: #26852 - [x] depends on: #26853 - [x] depends on: #27008 - [x] depends on: #28901 Zulip: [PR thread](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2326923.20The.20pointwise.20ergodic.20theorem.20.28Birkhoff's.29/with/527835158) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-dynamics 401/0 Mathlib.lean,Mathlib/Dynamics/BirkhoffSum/Pointwise.lean 2 13 ['D-Thomine', 'github-actions', 'leanprover-community-bot-assistant', 'lua-vr', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] urkud
assignee:urkud
none
1-61910
1 day ago
38-80753
1 month ago
45-50223
45 days
26956 mariainesdff
author:mariainesdff
feat(RingTheory/DividedPowers/Basic): add divided power structure on pZp We construct a divided power structure on the ideal `(p) ⊆ ℤ_[p]`, given by the family of maps `fun n x ↦ x^n / n!`. Co-authored-by: @AntoineChambert-Loir --- - [x] depends on: #22322 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 237/0 Mathlib.lean,Mathlib/RingTheory/DividedPowers/Padic.lean 2 18 ['github-actions', 'loefflerd', 'mariainesdff', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] loefflerd and mattrobball
assignee:loefflerd assignee:mattrobball
none
1-58686
1 day ago
17-47909
17 days ago
74-80921
74 days
26975 Whysoserioushah
author:Whysoserioushah
feat: a norm_num extension for complex numbers co-authored-by : @thefundamentaltheor3m, @hrmacbeth --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 350/0 Mathlib.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/NormNum/NormNumI.lean,MathlibTest/norm_numI.lean 5 47 ['Whysoserioushah', 'dupuisf', 'eric-wieser', 'github-actions', 'hrmacbeth'] robertylewis
assignee:robertylewis
none
1-40320
1 day ago
78-32126
2 months ago
78-36437
78 days
27207 pechersky
author:pechersky
feat(Topology/WithVal): ValuativeRel (WithVal v) with a helper valuation defined that does not pierce defeq --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology
label:t-algebra$
20/1 Mathlib/Topology/Algebra/Valued/WithVal.lean 1 8 ['alreadydone', 'github-actions', 'mathlib4-merge-conflict-bot', 'pechersky', 'smmercuri'] alreadydone
assignee:alreadydone
1
0-72436
20 hours ago
40-1037
1 month ago
73-53713
73 days
26885 pechersky
author:pechersky
feat(Topology/ValuativeRel): ValuativeTopology 𝒪[K] and even when not a field, `ValuativeRel 𝒪[K]` This is an example of something achievable with the new declarations that wasn't possible with Valued Such that we can discuss the valuations on the subring without always using coercions But to achieve this, one needs some juggling of the value groups --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #26834 t-algebra t-topology t-number-theory
label:t-algebra$
73/0 Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 2 8 ['erdOne', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] alreadydone
assignee:alreadydone
none
0-44056
12 hours ago
37-28345
1 month ago
87-13354
87 days
26267 vasnesterov
author:vasnesterov
feat(Analysis/Calculus): Taylor series converges to function on whole ball * Prove `FormalMultilinearSeries.AnalyticOnNhd`: the sum of series is analytic on its ball of convergence. * Prove `AnalyticOn.hasFPowerSeriesOnBall`: a variant of `AnalyticAt.hasFPowerSeriesAt` which gives convergence to the function on the ball of convergence. --- - [x] depends on: #23745 - [x] depends on: #23747 - [x] depends on: #23748 - [x] depends on: #26247 This PR continues the work from #23749. Original PR: https://github.com/leanprover-community/mathlib4/pull/23749 t-analysis 65/0 Mathlib.lean,Mathlib/Analysis/Analytic/ChangeOrigin.lean,Mathlib/Analysis/Calculus/IteratedDeriv/ConvergenceOnBall.lean 3 5 ['github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'vasnesterov'] urkud
assignee:urkud
none
0-40639
11 hours ago
44-45198
1 month ago
91-30068
91 days
28561 euprunin
author:euprunin
chore(Data): golf entire `equivFunOnFintype_single`, `predAbove_right_zero`, `snoc_zero` and more using `rfl` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 25/88 Mathlib/Data/DFinsupp/Defs.lean,Mathlib/Data/Fin/Tuple/Basic.lean,Mathlib/Data/Fin/Tuple/Take.lean,Mathlib/Data/Finmap.lean,Mathlib/Data/Finsupp/AList.lean,Mathlib/Data/Finsupp/Single.lean,Mathlib/Data/Matrix/Basic.lean,Mathlib/Data/Matrix/Block.lean,Mathlib/Data/PFunctor/Multivariate/W.lean,Mathlib/Data/PFunctor/Univariate/M.lean,Mathlib/Data/QPF/Multivariate/Constructions/Cofix.lean,Mathlib/Data/Seq/Computation.lean,Mathlib/Data/Set/Piecewise.lean,Mathlib/Data/Set/Sups.lean,Mathlib/Data/TypeVec.lean,Mathlib/Data/Vector/Basic.lean,Mathlib/Data/Vector/Defs.lean 17 7 ['github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] pechersky
assignee:pechersky
none
0-8015
2 hours ago
29-30851
29 days ago
45-6079
45 days
29356 Paul-Lez
author:Paul-Lez
feat(Mathlib/FieldTheory/RatFunc/Basic): add characteristic instances for `RatFunc` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
63/17 Mathlib.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Field.lean,Mathlib/Algebra/Algebra/IsSimpleRing.lean,Mathlib/Algebra/CharP/Algebra.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/FieldTheory/Differential/Liouville.lean,Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/FieldTheory/Finite/GaloisField.lean,Mathlib/FieldTheory/RatFunc/Basic.lean,Mathlib/RingTheory/Localization/FractionRing.lean 11 8 ['Paul-Lez', 'eric-wieser', 'github-actions'] kim-em
assignee:kim-em
none
0-8013
2 hours ago
29-17858
29 days ago
29-17890
29 days

PRs with just failing CI, but only often-spurious jobs

There are currently no PRs with just an infrastructure-related CI failure. Congratulations!

PRs addressing technical debt

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
30107 grunweg
author:grunweg
chore: track occurrences of 'nonrec' as technical debt Matches leanprover-community/leanprover-community.github.io#689: only merge when that is deemed a good idea. -------- TODO: make the count more robust, for instance count all occurrences of "^nonrec " plus those of "^[private|protected] nonrec ". --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt CI 1/0 scripts/technical-debt-metrics.sh 1 1 ['github-actions'] nobody
2-50034
2 days ago
2-67284
2 days ago
2-67265
2 days
30165 j-loreaux
author:j-loreaux
chore(Analysis/NormedSpace/Extend): deprecate module --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt t-analysis easy ready-to-merge 4/0 Mathlib.lean,Mathlib/Analysis/NormedSpace/Extend.lean 2 2 ['bryangingechen', 'github-actions'] nobody
0-851
14 minutes ago
0-851
13 minutes ago
0-47906
13 hours
13791 digama0
author:digama0
refactor: Primrec and Partrec General cleanup of the `Primrec` and `Partrec` files, to better adjust to lean 4 things. The main user-visible change is that `Primrec₂` is no longer a `def` but an `abbrev`, because it was causing inference issues in lean 4. I also removed all the nonterminal `simp`s in `PartrecCode.lean`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt t-computability merge-conflict 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
411-24815
1 year ago
451-49130
1 year ago
1-84718
1 day
15448 urkud
author:urkud
chore(*): deprecate `Option.elim'` Use `Option.elim` instead. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt merge-conflict awaiting-author 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
410-34780
1 year ago
411-23927
1 year ago
7-18420
7 days
16464 Parcly-Taxel
author:Parcly-Taxel
chore: deprecate `Nat.(case_)strong_induction_on` …in favour of the now-renamed `Nat.(case)strongInductionOn` in core. tech debt merge-conflict 54/56 Archive/Imo/Imo1981Q3.lean,Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/ContinuedFractions/Computation/TerminatesIffRat.lean,Mathlib/Algebra/ContinuedFractions/ConvergentsEquiv.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Lifts.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Hofer.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/Combinatorics/Derangements/Finite.lean,Mathlib/Combinatorics/Enumerative/Catalan.lean,Mathlib/Combinatorics/Hall/Finite.lean,Mathlib/Combinatorics/SetFamily/AhlswedeZhang.lean,Mathlib/Computability/Primrec.lean,Mathlib/Data/Fintype/Basic.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Data/Nat/Choose/Central.lean,Mathlib/Data/Nat/Defs.lean,Mathlib/Data/Nat/Digits.lean,Mathlib/Data/Nat/Log.lean,Mathlib/FieldTheory/Separable.lean,Mathlib/LinearAlgebra/Eigenspace/Triangularizable.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/NumberTheory/BernoulliPolynomials.lean,Mathlib/NumberTheory/DiophantineApproximation.lean,Mathlib/NumberTheory/Pell.lean,Mathlib/NumberTheory/Primorial.lean,Mathlib/Order/Fin/Basic.lean,Mathlib/RingTheory/Adjoin/PowerBasis.lean,Mathlib/RingTheory/LittleWedderburn.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Basic.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Eval.lean,Mathlib/RingTheory/Polynomial/Eisenstein/IsIntegral.lean,Mathlib/RingTheory/Polynomial/Nilpotent.lean,Mathlib/RingTheory/PowerSeries/Basic.lean,Mathlib/RingTheory/QuotientNilpotent.lean,Mathlib/RingTheory/WittVector/Defs.lean,Mathlib/RingTheory/WittVector/Frobenius.lean,Mathlib/RingTheory/WittVector/StructurePolynomial.lean,Mathlib/SetTheory/Surreal/Dyadic.lean,Mathlib/Topology/Metrizable/Uniformity.lean 43 13 ['Parcly-Taxel', 'b-mehta', 'github-actions', 'jcommelin'] nobody
378-34283
1 year ago
378-34283
1 year ago
8-1989
8 days
20872 grunweg
author:grunweg
feat: lint against the tactic.skipAssignedInstances option in mathlib This means we can remove the corresponding technical debt entry. We also correct some outdated details in the Linter/Style.lean docstring. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt t-linter merge-conflict awaiting-author 63/7 Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Topology/Separation/Regular.lean,MathlibTest/LintStyle.lean,scripts/technical-debt-metrics.sh 5 17 ['adomani', 'github-actions', 'grunweg'] nobody
247-23989
8 months ago
247-23989
8 months ago
0-9411
2 hours
22682 grunweg
author:grunweg
chore(Topology/Homeomorph): split out various constructions This makes `Homeomorph.lean` slightly more manageable, and also is a mild import reduction. edit: also split out IsHomeomorph, as this allows removing the dependencies on Constructions. Let's see if this gains much --- I don't feel strongly about this PR, but we might as well take it. - [ ] depends on: #22681 - [ ] depends on #22827 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt t-topology RFC merge-conflict 341/290 Mathlib.lean,Mathlib/Topology/Category/TopCat/ULift.lean,Mathlib/Topology/Homeomorph/Constructions.lean,Mathlib/Topology/Homeomorph/IsHomeomorph.lean,Mathlib/Topology/Homeomorph/Lemmas.lean,Mathlib/Topology/NoetherianSpace.lean 6 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
185-83009
6 months ago
185-83009
6 months ago
14-35834
14 days
23411 PatrickMassot
author:PatrickMassot
chore: remove finiteness from Order.Filter.Lift Co-authored-by: Anatole Dedecker --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) longest-pole t-topology merge-conflict 48/21 Mathlib/Dynamics/TopologicalEntropy/DynamicalEntourage.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Finite.lean,Mathlib/Order/Filter/Lift.lean,Mathlib/Order/Filter/SmallSets.lean,Mathlib/Topology/Algebra/ContinuousMonoidHom.lean,Mathlib/Topology/Basic.lean 7 4 ['Vierkantor', 'github-actions', 'kim-em', 'leanprover-community-bot-assistant'] nobody
178-64030
5 months ago
178-83599
5 months ago
10-21608
10 days
24100 eric-wieser
author:eric-wieser
feat: restore some explicit binders from Lean 3 Part of #24099 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt merge-conflict awaiting-author 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
131-47183
4 months ago
131-47185
4 months ago
34-33204
34 days
12879 grunweg
author:grunweg
feat: port ge_or_gt linter from mathlib3 Code works and is essentially green: next step is to split up into separate PRs. Feedback welcome on whether: - all the test changes are good, or I should simply allow it in more cases - if calc blocks need to be explicitly exempt --- - [ ] depends on: #12933 - [ ] depends on: #12934 - [ ] depends on: #12931 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt t-linter merge-conflict 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 3 ['github-actions', 'grunweg', 'leanprover-community-mathlib4-bot'] nobody
429-68430
1 year ago
451-49130
1 year ago
0-15202
4 hours

PRs blocked on a zulip discussion

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
15649 TpmKranz
author:TpmKranz
feat(Computability): introduce Generalised NFA as bridge to Regular Expression Lays the groundwork for a proof of equivalence of NFA and RE, w.r.t. described language. Actual connection to NFA comes later, after the groundwork for the opposite direction has been laid. Second chunk of #12648 --- - [x] depends on: #15647 [Data.FinEnum.Option unchanged since then] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-computability new-contributor awaiting-author 298/0 Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/RegularExpressions.lean,docs/references.bib 5 6 ['github-actions', 'mathlib4-dependent-issues-bot', 'meithecatte', 'trivial1711'] nobody
151-17165
4 months ago
151-17174
4 months ago
23-54870
23 days
20648 anthonyde
author:anthonyde
feat: formalize regular expression -> εNFA The file `Computability/RegularExpressionsToEpsilonNFA.lean` contains a formal definition of Thompson's method for constructing an `εNFA` from a `RegularExpression` and a proof of its correctness. --- - [x] depends on: #20644 - [x] depends on: #20645 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-computability new-contributor 490/0 Mathlib.lean,Mathlib/Computability/RegularExpressionsToEpsilonNFA.lean,docs/references.bib 3 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'meithecatte', 'qawbecrdtey'] nobody
151-16476
4 months ago
151-17111
4 months ago
75-77754
75 days
20238 maemre
author:maemre
feat(Computability/DFA): Closure of regular languages under some set operations This shows that regular languages are closed under complement and intersection by constructing DFAs for them. --- Closure under all other operations will be proved when someone adds the proof for DFA<->regular expression equivalence, so they are not part of this PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-computability new-contributor awaiting-author 159/0 Mathlib/Computability/DFA.lean,Mathlib/Computability/Language.lean 2 59 ['EtienneC30', 'YaelDillies', 'github-actions', 'maemre', 'meithecatte', 'urkud'] EtienneC30
assignee:EtienneC30
121-69336
3 months ago
151-17075
4 months ago
48-67492
48 days
23929 meithecatte
author:meithecatte
feat(Computability/NFA): improve bound on pumping lemma --- - [x] depends on: #25321 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-computability new-contributor 101/10 Mathlib/Computability/EpsilonNFA.lean,Mathlib/Computability/NFA.lean 2 41 ['YaelDillies', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'meithecatte'] nobody
118-26727
3 months ago
118-26728
3 months ago
34-10595
34 days
29072 yury-harmonic
author:yury-harmonic
feat({Nat,Int}/ModEq): add lemmas --- I'm not sure that I named these lemmas correctly. Suggestions about better names are welcome! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-zulip 171/15 Mathlib/Data/Int/ModEq.lean,Mathlib/Data/Nat/ModEq.lean 2 5 ['eric-wieser', 'github-actions', 'yury-harmonic'] nobody
35-70609
1 month ago
35-70609
1 month ago
0-55232
15 hours
29582 YaelDillies
author:YaelDillies
chore: rename `_root_.prop` to `Prop.finite` This was a surprising name! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-zulip 1/1 Mathlib/Data/Fintype/EquivFin.lean 1 11 ['YaelDillies', 'bryangingechen', 'eric-wieser', 'github-actions', 'grunweg', 'plp127'] nobody
10-82851
10 days ago
10-82852
10 days ago
3-1360
3 days
29110 NotWearingPants
author:NotWearingPants
feat(Counterexamples): Euler's sum of powers conjecture feat(Counterexamples): Euler's sum of powers conjecture --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip maintainer-merge new-contributor 158/0 Counterexamples.lean,Counterexamples/EulerSumOfPowers.lean 2 43 ['MichaelStollBayreuth', 'NotWearingPants', 'eric-wieser', 'github-actions', 'tb65536', 'urkud'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
7-26967
7 days ago
7-27023
7 days ago
24-25032
24 days
24754 urkud
author:urkud
feat: define `pathIntegral` This is a step towards formalizing of the Poincaré lemma for 1-forms. --- - [x] depends on: #24831 - [x] depends on: #25047 - [x] depends on: #25048 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-analysis awaiting-author 580/9 Mathlib.lean,Mathlib/Analysis/Convex/PathConnected.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/ContDiff.lean,Mathlib/MeasureTheory/Integral/PathIntegral/Basic.lean 6 42 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel', 'urkud'] j-loreaux
assignee:j-loreaux
6-31548
6 days ago
6-31548
6 days ago
17-56980
17 days
29002 grunweg
author:grunweg
chore: move Data/Real/Irrational to RingTheory It certainly has nothing to do with data (structures). --- I'm less sure where to put it instead. [zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Cleaning.20up.20.60Data.60/with/536301893) suggested this place; in the future, this could also be split. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed awaiting-zulip 10/10 Counterexamples/IrrationalPowerOfIrrational.lean,Mathlib.lean,Mathlib/Analysis/Real/Pi/Irrational.lean,Mathlib/Data/Real/GoldenRatio.lean,Mathlib/NumberTheory/DiophantineApproximation/Basic.lean,Mathlib/NumberTheory/Rayleigh.lean,Mathlib/NumberTheory/Transcendental/Liouville/Basic.lean,Mathlib/RingTheory/Real/Irrational.lean,Mathlib/Tactic/NormNum/Irrational.lean,Mathlib/Topology/Instances/AddCircle/DenseSubgroup.lean,Mathlib/Topology/Instances/Irrational.lean 11 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
5-63422
5 days ago
5-63505
5 days ago
0-67
1 minute
28925 grunweg
author:grunweg
chore: remove `linear_combination'` tactic When `linear_combination` was refactored in #15899, the old code was kept as the `linear_combination'` tactic, for easier migration. The consensus of the zulip discussion ([#mathlib4 > Narrowing the scope of `linear_combination` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Narrowing.20the.20scope.20of.20.60linear_combination.60/near/470237816)) was to wait, and "revisit this once people have experienced the various tactics in practice". One year later, the old tactic has almost no uses: it is unused in mathlib; [searching on github](https://github.com/search?q=linear_combination%27%20path%3A*.lean&type=code) yields 37 hits --- all of which are in various forks of mathlib. Thus, removing this tactic seems appropriate. --- Do not merge before the zulip discussion has concluded! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 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 3 ['euprunin', 'github-actions', 'grunweg'] nobody
5-34986
5 days ago
39-20894
1 month ago
0-1
1 second
11800 JADekker
author:JADekker
feat : Define KappaLindelöf spaces Define KappaLindelöf spaces by following the first one-third of the API for Lindelöf spaces. The remainder will be added in a future PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-topology merge-conflict please-adopt 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
382-80598
1 year ago
383-16173
1 year ago
119-10687
119 days
17623 FR-vdash-bot
author:FR-vdash-bot
feat(Algebra/Order/GroupWithZero/Unbundled): add some lemmas Some lemmas in `Algebra.Order.GroupWithZero.Unbundled` have incorrect or unsatisfactory names, or assumptions that can be omitted using `ZeroLEOneClass`. The lemmas added in this PR are versions of existing lemmas that use the correct or better name or `ZeroLEOneClass` to omit an assumption. The original lemmas will be deprecated in #17593. | New name | Old name | |-------------------------|-------------------------| | `mul_le_one_left₀` | `Left.mul_le_one_of_le_of_le` | | `mul_lt_one_of_le_of_lt_left₀` (`0 ≤ ·` version) / `mul_lt_one_of_le_of_lt_of_pos_left` | `Left.mul_lt_of_le_of_lt_one_of_pos` | | `mul_lt_one_of_lt_of_le_left₀` | `Left.mul_lt_of_lt_of_le_one_of_nonneg` | | `mul_le_one_right₀` | `Right.mul_le_one_of_le_of_le` | | `mul_lt_one_of_lt_of_le_right₀` (`0 ≤ ·` version) / `mul_lt_one_of_lt_of_le_of_pos_right` | `Right.mul_lt_one_of_lt_of_le_of_pos` | | `mul_lt_one_of_le_of_lt_right₀` | `Right.mul_lt_one_of_le_of_lt_of_nonneg` | The following lemmas use `ZeroLEOneClass`. | New name | Old name | |-------------------------|-------------------------| | `(Left.)one_le_mul₀` | `Left.one_le_mul_of_le_of_le` | | `Left.one_lt_mul_of_le_of_lt₀` | `Left.one_lt_mul_of_le_of_lt_of_pos` | | `Left.one_lt_mul_of_lt_of_le₀` | `Left.lt_mul_of_lt_of_one_le_of_nonneg` / `one_lt_mul_of_lt_of_le` (still there) | | `(Left.)one_lt_mul₀` | | | `Right.one_le_mul₀` | `Right.one_le_mul_of_le_of_le` | | `Right.one_lt_mul_of_lt_of_le₀` | `Right.one_lt_mul_of_lt_of_le_of_pos` | | `Right.one_lt_mul_of_le_of_lt₀` | `Right.one_lt_mul_of_le_of_lt_of_nonneg` / `one_lt_mul_of_le_of_lt` (still there) / `one_lt_mul` (still there) | | `Right.one_lt_mul₀` | `Right.one_lt_mul_of_lt_of_lt` | --- Split from #17593. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-order t-algebra merge-conflict
label:t-algebra$
146/44 Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean 2 11 ['FR-vdash-bot', 'YaelDillies', 'github-actions', 'j-loreaux'] nobody
317-53848
10 months ago
317-53848
10 months ago
33-64877
33 days
8370 eric-wieser
author:eric-wieser
refactor(Analysis/NormedSpace/Exponential): remove the `𝕂` argument from `exp` This argument is still needed for almost all the lemmas, which means it can longer be found by unification. We keep around `expSeries 𝕂 A`, as it's needed for talking about the radius of convergence over different base fields. This is a prerequisite for #8372, as we can't merge the functions until they have the same interface.\ Zulip thread: [#mathlib4 > Real.exp @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Real.2Eexp/near/401602245) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This is started from the mathport output on https://github.com/leanprover-community/mathlib/pull/19244 awaiting-zulip t-analysis merge-conflict 432/387 Mathlib/Analysis/CStarAlgebra/Exponential.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/Exponential.lean,Mathlib/Analysis/Normed/Algebra/MatrixExponential.lean,Mathlib/Analysis/Normed/Algebra/QuaternionExponential.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/TrivSqZeroExt.lean,Mathlib/Analysis/NormedSpace/DualNumber.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog.lean,Mathlib/Analysis/SpecialFunctions/Exponential.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Series.lean 11 29 ['YaelDillies', 'eric-wieser', 'girving', 'github-actions', 'j-loreaux', 'kbuzzard', 'leanprover-community-bot-assistant', 'urkud'] nobody
162-9225
5 months ago
173-37855
5 months ago
29-60989
29 days
15651 TpmKranz
author:TpmKranz
feat(Computability/NFA): operations for Thompson's construction Lays the groundwork for a proof of equivalence of RE and NFA, w.r.t. described language. Actual connection to REs comes later, after the groundwork for the opposite direction has been laid. Third chunk of #12648 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-computability new-contributor merge-conflict awaiting-author 307/5 Mathlib/Computability/NFA.lean 1 15 ['TpmKranz', 'YaelDillies', 'dupuisf', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte'] nobody
137-39731
4 months ago
137-39732
4 months ago
45-84611
45 days
22361 rudynicolop
author:rudynicolop
feat(Computability/NFA): nfa closure properties Add the closure properties union, intersection and reversal for NFA. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-computability new-contributor merge-conflict awaiting-author 218/2 Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean 2 90 ['EtienneC30', 'b-mehta', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] EtienneC30
assignee:EtienneC30
137-38805
4 months ago
137-38807
4 months ago
39-67601
39 days
17458 urkud
author:urkud
refactor(Algebra/Group): make `IsUnit` a typeclass Also change some lemmas to assume `[IsUnit _]` instead of `[Invertible _]`. Motivated by potential non-defeq diamonds in #14986, see also [Zulip](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Invertible.20and.20data) I no longer plan to merge this PR, but I'm going to cherry-pick some changes to a new PR before closing this one. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-algebra merge-conflict
label:t-algebra$
82/72 Mathlib/Algebra/CharP/Invertible.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Units.lean,Mathlib/Algebra/Polynomial/Splits.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Normed/Affine/Isometry.lean,Mathlib/Analysis/Normed/Ring/Units.lean,Mathlib/CategoryTheory/Linear/Basic.lean,Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/FieldTheory/Separable.lean,Mathlib/FieldTheory/SeparableDegree.lean,Mathlib/GroupTheory/Submonoid/Inverses.lean,Mathlib/LinearAlgebra/AffineSpace/AffineEquiv.lean,Mathlib/LinearAlgebra/AffineSpace/Combination.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Contraction.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Inversion.lean,Mathlib/LinearAlgebra/CliffordAlgebra/SpinGroup.lean,Mathlib/LinearAlgebra/Eigenspace/Minpoly.lean,Mathlib/NumberTheory/MulChar/Basic.lean,Mathlib/RingTheory/Localization/NumDen.lean,Mathlib/RingTheory/Polynomial/Content.lean,Mathlib/RingTheory/Polynomial/GaussLemma.lean,Mathlib/RingTheory/Valuation/Basic.lean 26 12 ['MichaelStollBayreuth', 'acmepjz', 'eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'urkud'] nobody
90-83874
2 months ago
90-83874
2 months ago
0-66650
18 hours
25218 kckennylau
author:kckennylau
feat(AlgebraicGeometry): Tate normal form of elliptic curves --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip new-contributor t-algebraic-geometry merge-conflict 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
90-82712
2 months ago
90-82713
2 months ago
6-51040
6 days
28298 thorimur
author:thorimur
chore: dedent `to_additive` docstrings This PR uses automation to dedent `to_additive` docstrings throughout Mathlib. It does not lint against indentation or in any way enforce indentation standards for future docstrings. The convention was chosen in accordance with the discussion and polls at [this Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Poll.3A.20Indentation.20style.20for.20.60to_additive.60.20docstrings/with/534285603). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip merge-conflict documentation 949/949 Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Defs.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/Category/Grp/Basic.lean,Mathlib/Algebra/Category/Grp/FilteredColimits.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/Grp/Ulift.lean,Mathlib/Algebra/Category/MonCat/Basic.lean,Mathlib/Algebra/Category/MonCat/FilteredColimits.lean,Mathlib/Algebra/Category/MonCat/Limits.lean,Mathlib/Algebra/Category/Semigrp/Basic.lean,Mathlib/Algebra/Free.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/Pi.lean,Mathlib/Algebra/Group/Action/Pointwise/Finset.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Embedding.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Algebra/Group/Equiv/Opposite.lean,Mathlib/Algebra/Group/Even.lean,Mathlib/Algebra/Group/Hom/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Hom/Instances.lean,Mathlib/Algebra/Group/Indicator.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/Group/Pi/Units.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Group/Subgroup/Lattice.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Group/Subgroup/Pointwise.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Group/Submonoid/BigOperators.lean,Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Submonoid/MulAction.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/Subsemigroup/Basic.lean,Mathlib/Algebra/Group/Subsemigroup/Operations.lean,Mathlib/Algebra/Group/UniqueProds/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Group/Units/Equiv.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/Group/Units/Opposite.lean,Mathlib/Algebra/Notation/Pi/Basic.lean,Mathlib/Algebra/Opposites.lean,Mathlib/Algebra/Order/BigOperators/Group/List.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Basic.lean,Mathlib/Algebra/Order/Group/Cone.lean,Mathlib/Algebra/Order/Group/OrderIso.lean,Mathlib/Algebra/Order/Group/Units.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Submonoid.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Monoid/Units.lean,Mathlib/Algebra/Order/Pi.lean,Mathlib/Algebra/Regular/Defs.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Data/Finset/NoncommProd.lean,Mathlib/Data/Fintype/BigOperators.lean,Mathlib/Data/Set/MulAntidiagonal.lean,Mathlib/Data/Set/SMulAntidiagonal.lean,Mathlib/Data/Vector/Basic.lean,Mathlib/Dynamics/Ergodic/Action/OfMinimal.lean,Mathlib/Dynamics/FixedPoints/Prufer.lean,Mathlib/Geometry/Manifold/Algebra/SmoothFunctions.lean,Mathlib/GroupTheory/Complement.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Coprod/Basic.lean,Mathlib/GroupTheory/Coset/Basic.lean,Mathlib/GroupTheory/Divisible.lean,Mathlib/GroupTheory/EckmannHilton.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/GroupTheory/FreeGroup/Reduce.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/Blocks.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/FixedPoints.lean,Mathlib/GroupTheory/GroupAction/Hom.lean,Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/GroupTheory/GroupAction/Primitive.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean 141 10 ['eric-wieser', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'thorimur'] nobody
50-24806
1 month ago
51-12178
1 month ago
0-61617
17 hours
28803 astrainfinita
author:astrainfinita
refactor: unbundle algebra from `ENormed*` Further speed up the search in the algebraic typeclass hierarchy by avoiding searching for `TopologicalSpace`. This PR continues the work from #23961. - Change `ESeminormed(Add)Monoid` and `ENormed(Add)Monoid` so they no longer carry algebraic data. - Deprecate `ESeminormed(Add)CommMonoid` and `ENormed(Add)CommMonoid` in favor of `ESeminormed(Add)Monoid` and `ENormed(Add)Monoid` with a commutative algebraic typeclass. |Old|New| |---|---| | `[ESeminormed(Add)(Comm)Monoid E]` | `[(Add)(Comm)Monoid E] [ESeminormed(Add)Monoid E]` | | `[ENormed(Add)(Comm)Monoid]` | `[(Add)(Comm)Monoid E] [ENormed(Add)Monoid]` | See [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2328803.20refactor.3A.20unbundle.20algebra.20from.20.60ENormed*.60/with/536024350) ------------ - [x] depends on: #28813 awaiting-zulip slow-typeclass-synthesis t-algebra t-analysis merge-conflict
label:t-algebra$
80/63 Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/Normed/Group/InfiniteSum.lean,Mathlib/Analysis/NormedSpace/IndicatorFunction.lean,Mathlib/MeasureTheory/Function/L1Space/AEEqFun.lean,Mathlib/MeasureTheory/Function/L1Space/HasFiniteIntegral.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean 14 28 ['astrainfinita', 'bryangingechen', 'github-actions', 'grunweg', 'kbuzzard', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] grunweg
assignee:grunweg
31-11957
1 month ago
31-11958
1 month ago
0-20585
5 hours
17518 grunweg
author:grunweg
feat: lint on declarations mentioning `Invertible` or `Unique` Using the same infrastructure as for #10235. Depends on that PR to land first, and also (for the first lint) a zulip discussion if that change is desired/about the best way to enact it. --- - [ ] depends on: #10235 awaiting-zulip t-linter merge-conflict blocked-by-other-PR 149/7 Mathlib.lean,Mathlib/Algebra/MvPolynomial/PDeriv.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/TuringMachine.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/GroupTheory/Perm/DomMulAct.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/NumberTheory/JacobiSum/Basic.lean,Mathlib/Order/Heyting/Regular.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/FundamentalTheorem.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/UnusedAssumptionInType.lean 13 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mergify'] nobody
335-34317
11 months ago
361-22839
11 months ago*
0-0
0 seconds*
15654 TpmKranz
author:TpmKranz
feat(Computability): language-preserving maps between NFA and RE Map REs to NFAs via Thompson's construction and NFAs to REs using GNFAs Last chunk of #12648 --- - [ ] depends on: #15651 - [ ] depends on: #15649 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-computability new-contributor merge-conflict blocked-by-other-PR 985/2 Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean,Mathlib/Computability/RegularExpressions.lean,Mathlib/Data/FinEnum/Option.lean,docs/references.bib 7 3 ['github-actions', 'leanprover-community-mathlib4-bot', 'meithecatte'] nobody
151-17125
4 months ago
151-17130
4 months ago
0-179
2 minutes

PRs with just a merge conflict

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
12936 mattrobball
author:mattrobball
chore(Quiver.Opposite): make `Quiver.Hom.op/unop` `abbrev`'s These are wrappers around the constructor and projection for `Opposite Quiver.Hom _ _`. The projection itself is reducible and with structure eta built in to defeq it seems like we might be making Lean work harder than is necessary. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 39/34 Mathlib/Algebra/Homology/ShortComplex/Homology.lean,Mathlib/Algebra/Homology/ShortComplex/RightHomology.lean,Mathlib/CategoryTheory/Idempotents/Basic.lean,Mathlib/CategoryTheory/Limits/HasLimits.lean,Mathlib/CategoryTheory/Limits/Opposites.lean,Mathlib/CategoryTheory/Opposites.lean,Mathlib/CategoryTheory/Sites/CoverLifting.lean,Mathlib/CategoryTheory/Subobject/Comma.lean,Mathlib/CategoryTheory/Triangulated/Opposite.lean,Mathlib/Combinatorics/Quiver/Basic.lean 10 9 ['YaelDillies', 'kim-em', 'leanprover-bot', 'mattrobball'] nobody
429-68430
1 year ago
497-34422
1 year ago
0-0
0 seconds
10721 urkud
author:urkud
feat(Order/FunLike): define `PointwiseLE` - introduce a mixin class `DFunLike.PointwiseLE`, use it to define `DFunLike.instPartialOrder`; - add a generic `DFunLike.orderEmbeddingCoe` - add `DFunLike.PointwiseLE` instances here and there. With this refactor and #13022, I'm going to generalize lemmas like `MeasureTheory.ae_mono` to `OuterMeasureClass`. --- - [x] depends on: #12983 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic t-order merge-conflict 123/50 Mathlib.lean,Mathlib/Algebra/Order/Hom/Ring.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Dynamics/Circle/RotationNumber/TranslationNumber.lean,Mathlib/GroupTheory/Congruence.lean,Mathlib/Order/FunLike.lean,Mathlib/Order/Heyting/Hom.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Hom/Bounded.lean,Mathlib/Order/Hom/CompleteLattice.lean,Mathlib/Topology/Order/Hom/Basic.lean 13 48 ['YaelDillies', 'dupuisf', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
429-68428
1 year ago
451-49130
1 year ago
64-12826
64 days
8788 FMLJohn
author:FMLJohn
feat(Algebra/Module/GradeZeroModule): if `A` is a graded semiring and `M` is a graded `A`-module, then each grade of `M` is a module over the 0-th grade of `A`. --- - [ ] depends on: #8187 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
237/4 Mathlib.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Module/GradeZeroModule.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/Noetherian.lean 6 4 ['FMLJohn', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
429-68427
1 year ago
463-56329
1 year ago
0-0
0 seconds
6777 adomani
author:adomani
chore(Co*variantClass): replace eta-expanded (· * ·), (· + ·), (· ≤ ·), (· < ·) Replace `CovariantClass X X (· * ·) (· ≤ ·)` with -> `CovariantClass X X HMul.hMul LE.le` and similarly for `HAdd`, `LT`, `Contravariant`. This PR is inspired by [Issue #6646](https://github.com/leanprover-community/mathlib4/issues/6646) and, more specifically, [this comment](https://github.com/leanprover-community/mathlib4/issues/6646#issuecomment-1692792066). Note that https://github.com/leanprover/lean4/pull/2267 would make this unnecessary --- ```bash # First sed command: # the first captured pattern is `Co*variantClass ` # the second captured pattern is `` # the third captured pattern is `+` or `*` # the fourth captured pattern is `<` or `≤` # a match for `Co*variantClass ·) (· ·)` becomes # `Co*variantClass replaceop replaceop` # Second sed command: similar to the first, but looks for `(Function.swap (· ·))` sed -i ' s=\(Co[ntra]*variantClass \(..*\) \2 \)(· *\([+*]\) *·) (· *\([<≤]\) *·)=\1replaceop\3 replaceop\4=g s=\(Co[ntra]*variantClass \(..*\) \2 \)(\([Functio\.swap ]*\)(· *\([+*]\) *·)) (· *\([<≤]\) *·)=\1(\3replaceop\4) replaceop\5=g s=replaceop+=HAdd.hAdd=g s=replaceop\*=HMul.hMul=g s=replaceop<=LT.lt=g s=replaceop≤=LE.le=g s=\(Co[ntra]*variantClass N N\) (· \* ·) r=\1 HMul.hMul r=g s=\(Co[ntra]*variantClass N N (swap μ)\) (· ≤ ·)=\1 LE.le=g s=\(Co[ntra]*variantClass N N\) (swap (· \* ·)) r=\1 (swap HMul.hMul) r=g s=\(CovariantClass (Filter α) (Filter α)\) (· / ·) (· ≤ ·)=\1 HDiv.hDiv LE.le=g s=\(CovariantClass (Filter α) (Filter α)\) (swap (· / ·)) (· ≤ ·)=\1 (swap HDiv.hDiv) LE.le=g s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· ≤ ·)=\1 LE.le=g s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· < ·)=\1 LT.lt=g s=\(Co[ntra]*variantClass [^}]*\) (· ≤ ·)=\1 LE.le=g s=\(CovariantClass .* (Filter β)\) (· • ·) LE.le=\1 HSMul.hSMul LE.le=g ' $(git ls-files '*.lean') ``` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 703/678 Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/Bounds.lean,Mathlib/Algebra/CovariantAndContravariant.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/GroupPower/Order.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/Archimedean.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Group/DenselyOrdered.lean,Mathlib/Algebra/Order/Group/MinMax.lean,Mathlib/Algebra/Order/Group/OrderIso.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Interval.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/LatticeGroup.lean,Mathlib/Algebra/Order/Module.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Cancel/Defs.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/Lemmas.lean,Mathlib/Algebra/Order/Monoid/MinMax.lean,Mathlib/Algebra/Order/Monoid/NatCast.lean,Mathlib/Algebra/Order/Monoid/OrderDual.lean,Mathlib/Algebra/Order/Monoid/Prod.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithZero/Basic.lean,Mathlib/Algebra/Order/Monoid/WithZero/Defs.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Pointwise.lean,Mathlib/Algebra/Order/Positive/Ring.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Lemmas.lean,Mathlib/Algebra/Order/Sub/Basic.lean,Mathlib/Algebra/Order/Sub/Canonical.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Algebra/Order/WithZero.lean,Mathlib/Algebra/Parity.lean,Mathlib/Algebra/Star/Order.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Normed/Order/Lattice.lean,Mathlib/Data/DFinsupp/Lex.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/List/BigOperators/Basic.lean,Mathlib/Data/List/BigOperators/Lemmas.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Nat/Cast/Order.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/Real/ENNReal.lean,Mathlib/Data/Real/NNReal.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/Data/Sign.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/VectorMeasure.lean,Mathlib/Order/ConditionallyCompleteLattice/Group.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Martingale/Basic.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/PGame.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/NaturalOps.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/Positivity/Basic.lean,Mathlib/Topology/ContinuousFunction/Algebra.lean,lean-toolchain,test/Recall.lean,test/propose.lean 81 36 ['adomani', 'alreadydone', 'digama0', 'eric-wieser', 'ericrbg', 'jcommelin', 'leanprover-bot', 'sgouezel'] nobody
429-68426
1 year ago
451-49130
1 year ago
35-56459
35 days
6993 jjaassoonn
author:jjaassoonn
feat : lemmas about `AddMonoidAlgebra.{divOf, modOf}` --- - [x] depends on: #7582 - [x] depends on: #8975 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
147/3 Mathlib/Algebra/MonoidAlgebra/Division.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/MvPolynomial/Basic.lean,Mathlib/Data/MvPolynomial/CommRing.lean,Mathlib/Data/MvPolynomial/Division.lean 5 42 ['YaelDillies', 'alreadydone', 'digama0', 'eric-wieser', 'github-actions', 'jjaassoonn', 'leanprover-community-mathlib4-bot'] nobody
429-68425
1 year ago
451-49130
1 year ago
102-21189
102 days
6491 eric-wieser
author:eric-wieser
chore(Mathlib/Algebra/Hom/GroupAction): add `SMulHomClass.comp_smul` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
24/10 Mathlib/Algebra/Hom/GroupAction.lean 1 0 [] nobody
429-68425
1 year ago
451-49130
1 year ago
83-76369
83 days
10629 madvorak
author:madvorak
feat: List.cons_sublist_append_iff_right --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 11/0 Mathlib/Data/List/Basic.lean 1 1 ['eric-wieser'] nobody
415-61970
1 year ago
415-61970
1 year ago
53-73442
53 days
13791 digama0
author:digama0
refactor: Primrec and Partrec General cleanup of the `Primrec` and `Partrec` files, to better adjust to lean 4 things. The main user-visible change is that `Primrec₂` is no longer a `def` but an `abbrev`, because it was causing inference issues in lean 4. I also removed all the nonterminal `simp`s in `PartrecCode.lean`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt t-computability merge-conflict 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
411-24815
1 year ago
451-49130
1 year ago
1-84718
1 day
11964 adamtopaz
author:adamtopaz
feat: The functor of points of a scheme We construct the functor of points functor, and prove that it's full and faithful. --- - [ ] depends on: #11947 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry t-category-theory merge-conflict 210/0 Mathlib.lean,Mathlib/AlgebraicGeometry/FunctorOfPoints.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean 3 4 ['github-actions', 'grunweg', 'leanprover-community-mathlib4-bot'] nobody
411-24674
1 year ago
451-49130
1 year ago
0-1223
20 minutes
12418 rosborn
author:rosborn
style: replace preimage_val with ↓∩ notation --- This is a rough draft of what the new `↓∩` notation would look like within mathlib. I believe this is an improvement in clarity and would like to have `↓∩` as a standard notation (along with `''`, `⁻¹'`, `↑`, etc...). As `↓∩` is specialized for `Set`s, I have only changed `preimage_val` when the left-hand side of `↓∩` is a `Set`. The introduction of the `↓∩` notation to Data.Set.Image is temporary as it isn't possible to import Data.Set.Subset directly. If we want `↓∩` unscoped, where would be the best place to define it? An option is Data.Set.Defs, but the notation cannot be defined without additional imports as the file does not import `notation3`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 56/61 Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Data/Set/Function.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Set/Subset.lean,Mathlib/MeasureTheory/Constructions/Polish.lean,Mathlib/MeasureTheory/MeasurableSpace/Basic.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/Order/UpperLower/Basic.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/Clopen.lean,Mathlib/Topology/Connected/Basic.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/LocalAtTarget.lean,Mathlib/Topology/LocallyConstant/Basic.lean,Mathlib/Topology/Separation.lean,Mathlib/Topology/Sober.lean 18 3 ['grunweg', 'rosborn'] nobody
411-24573
1 year ago
451-49130
1 year ago
29-14218
29 days
12751 Command-Master
author:Command-Master
feat: add lemmas for Nat/Bits, Nat/Bitwise and Nat/Size Remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor merge-conflict 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
410-45727
1 year ago
415-61969
1 year ago
54-52408
54 days
16464 Parcly-Taxel
author:Parcly-Taxel
chore: deprecate `Nat.(case_)strong_induction_on` …in favour of the now-renamed `Nat.(case)strongInductionOn` in core. tech debt merge-conflict 54/56 Archive/Imo/Imo1981Q3.lean,Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/ContinuedFractions/Computation/TerminatesIffRat.lean,Mathlib/Algebra/ContinuedFractions/ConvergentsEquiv.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Lifts.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Hofer.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/Combinatorics/Derangements/Finite.lean,Mathlib/Combinatorics/Enumerative/Catalan.lean,Mathlib/Combinatorics/Hall/Finite.lean,Mathlib/Combinatorics/SetFamily/AhlswedeZhang.lean,Mathlib/Computability/Primrec.lean,Mathlib/Data/Fintype/Basic.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Data/Nat/Choose/Central.lean,Mathlib/Data/Nat/Defs.lean,Mathlib/Data/Nat/Digits.lean,Mathlib/Data/Nat/Log.lean,Mathlib/FieldTheory/Separable.lean,Mathlib/LinearAlgebra/Eigenspace/Triangularizable.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/NumberTheory/BernoulliPolynomials.lean,Mathlib/NumberTheory/DiophantineApproximation.lean,Mathlib/NumberTheory/Pell.lean,Mathlib/NumberTheory/Primorial.lean,Mathlib/Order/Fin/Basic.lean,Mathlib/RingTheory/Adjoin/PowerBasis.lean,Mathlib/RingTheory/LittleWedderburn.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Basic.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Eval.lean,Mathlib/RingTheory/Polynomial/Eisenstein/IsIntegral.lean,Mathlib/RingTheory/Polynomial/Nilpotent.lean,Mathlib/RingTheory/PowerSeries/Basic.lean,Mathlib/RingTheory/QuotientNilpotent.lean,Mathlib/RingTheory/WittVector/Defs.lean,Mathlib/RingTheory/WittVector/Frobenius.lean,Mathlib/RingTheory/WittVector/StructurePolynomial.lean,Mathlib/SetTheory/Surreal/Dyadic.lean,Mathlib/Topology/Metrizable/Uniformity.lean 43 13 ['Parcly-Taxel', 'b-mehta', 'github-actions', 'jcommelin'] nobody
378-34283
1 year ago
378-34283
1 year ago
8-1989
8 days
17127 FR-vdash-bot
author:FR-vdash-bot
chore: remove global `Quotient.mk` `⟦·⟧` notation --- Merge this PR when we are ready to migrate to `QuotLike` API (#16421). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 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
368-83066
1 year ago
368-83066
1 year ago
4-72805
4 days
8029 alreadydone
author:alreadydone
refactor: Homotopy between Functions not ContinuousMaps This allows talking about homotopies without needing to supply proofs of continuity for the two ends. This for example simplifies the definition of H-spaces. Of course, if a homotopy exists between two functions, those two functions are automatically continuous because they are restrictions of the homotopy (which is continuous) to subspaces. `Homotopy.refl` still needs a continuous map as input, and `Homotopic` is only an equivalence relation when restricted to ContinuousMap. --- TODO: fix docstrings [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology RFC merge-conflict 246/250 Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/Topology/Homotopy/Basic.lean,Mathlib/Topology/Homotopy/Contractible.lean,Mathlib/Topology/Homotopy/Equiv.lean,Mathlib/Topology/Homotopy/HSpaces.lean,Mathlib/Topology/Homotopy/HomotopyGroup.lean,Mathlib/Topology/Homotopy/Path.lean,Mathlib/Topology/Homotopy/Product.lean 8 3 ['alreadydone', 'urkud'] nobody
359-25471
11 months ago
451-49130
1 year ago
9-20043
9 days
14598 Command-Master
author:Command-Master
chore: add typeclasses to unify various `add_top`, `add_eq_top`, etc. Add the four typeclasses `IsTopAbsorbing`, `IsBotAbsorbing`, `NoTopSum`, `NoBotSum`, as additive equivalents for `MulZeroClass` and `NoZeroDivisors`. Add instances of these for `ENNReal`, `WithTop α`, `WithBot α`, `PUnit`, `EReal`, `PartENat`, `Measure`, `Interval` and `Filter`. Also split `Algebra/Order/AddGroupWithTop` to `Algebra/Order/Group/WithTop` and `Algebra/Order/Monoid/WithTop` --- Previous usages of lemmas with quantified names like `WithTop.add_top` have to be changed to just `add_top`. `add_lt_top` is `@[simp]`, in accordance with `ENNReal.add_lt_top` being `@[simp]`. This affects `WithTop.add_lt_top` which previously hadn't been `@[simp]`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order t-algebra merge-conflict
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
331-78532
10 months ago
331-78532
10 months ago
7-45599
7 days
12778 MichaelStollBayreuth
author:MichaelStollBayreuth
perf: decouple algebraic and order hierarchies in type class search Based on the experience gained with [#12680](https://github.com/leanprover-community/mathlib4/pull/12680), this attempts to decouple the algebraic and order hierarchies in type class search. * We lower the priorities of instances like `OrderedSemiring.toSemiring` (which are generated by the `extends` clause with default priority 1000) to 50. * Additionally, we make the default priority available via `open scoped AlgebraOrderInstances` and use that where appropriate. **Motivation:** Looking at instance synthesization traces, it appears that when (e.g.) presented with the goal to find a `Semiring` instance, the algorithm frequently goes down a rabbit hole trying and failing to find order instances. This seems to be caused by the presence of instances like `OrderedSemiring.toSemiring` with default priority, which are tried early in the search, but lead nowhere (after a fairly long time). These instances are created by declarations of the form ```lean class OrderedSemiring (α : Type u) extends Semiring α, OrderedAddCommMonoid α where ... ``` which automatically sets up (among other things) an instance `OrderedSemiring.toSemiring` with default piority. It appears that these instances cannot be removed completely (only locally in a module), so the next best solution is to make them low priority (which is possible also for downstream modules). To provide for situations where these instances are desired, we put a default priority version in the scope `AlgebraOrderInstances`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) slow-typeclass-synthesis t-order t-algebra merge-conflict
label:t-algebra$
306/27 Mathlib/Algebra/Algebra/Subalgebra/Order.lean,Mathlib/Algebra/ContinuedFractions/Computation/ApproximationCorollaries.lean,Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/Module/Rat.lean,Mathlib/Algebra/Module/Submodule/Order.lean,Mathlib/Algebra/Order/AbsoluteValue.lean,Mathlib/Algebra/Order/Algebra.lean,Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/BigOperators/Group/Finset.lean,Mathlib/Algebra/Order/BigOperators/Group/List.lean,Mathlib/Algebra/Order/BigOperators/Group/Multiset.lean,Mathlib/Algebra/Order/BigOperators/Ring/Finset.lean,Mathlib/Algebra/Order/BigOperators/Ring/List.lean,Mathlib/Algebra/Order/BigOperators/Ring/Multiset.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Order/Chebyshev.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Field/Pi.lean,Mathlib/Algebra/Order/Floor.lean,Mathlib/Algebra/Order/Floor/Div.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Group/Units.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Hom/Basic.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Algebra/Order/Interval/Set/Instances.lean,Mathlib/Algebra/Order/Invertible.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/Module/Algebra.lean,Mathlib/Algebra/Order/Module/Defs.lean,Mathlib/Algebra/Order/Module/Pointwise.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/OrderDual.lean,Mathlib/Algebra/Order/Monoid/Prod.lean,Mathlib/Algebra/Order/Nonneg/Field.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Pi.lean,Mathlib/Algebra/Order/Positive/Field.lean,Mathlib/Algebra/Order/Positive/Ring.lean,Mathlib/Algebra/Order/Rearrangement.lean,Mathlib/Algebra/Order/Ring/Basic.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/InjSurj.lean,Mathlib/Algebra/Order/Ring/Pow.lean,Mathlib/Algebra/Order/Sub/WithTop.lean,Mathlib/Algebra/Order/ToIntervalMod.lean,Mathlib/Algebra/Ring/BooleanRing.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/Analysis/BoundedVariation.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Metric.lean,Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/Convex/Cone/Basic.lean,Mathlib/Analysis/Convex/Cone/Closure.lean,Mathlib/Analysis/Convex/Cone/Pointed.lean,Mathlib/Analysis/Convex/Cone/Proper.lean,Mathlib/Analysis/Convex/Exposed.lean,Mathlib/Analysis/Convex/Extrema.lean,Mathlib/Analysis/Convex/Function.lean,Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Convex/GaugeRescale.lean,Mathlib/Analysis/Convex/Hull.lean,Mathlib/Analysis/Convex/Join.lean,Mathlib/Analysis/Convex/Mul.lean,Mathlib/Analysis/Convex/Quasiconvex.lean,Mathlib/Analysis/Convex/SpecificFunctions/Pow.lean,Mathlib/Analysis/Convex/Star.lean,Mathlib/Analysis/Convex/Strict.lean,Mathlib/Analysis/InnerProductSpace/Orientation.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/SpecialFunctions/Gamma/BohrMollerup.lean,Mathlib/Analysis/SpecialFunctions/Polynomials.lean,Mathlib/Analysis/SpecificLimits/FloorPow.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/Combinatorics/Optimization/ValuedCSP.lean,Mathlib/Combinatorics/Pigeonhole.lean,Mathlib/Combinatorics/SetFamily/FourFunctions.lean,Mathlib/Data/DFinsupp/Lex.lean,Mathlib/Data/DFinsupp/Multiset.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finset/MulAntidiagonal.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/Finsupp/Multiset.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Int/Log.lean,Mathlib/Data/Multiset/Antidiagonal.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Multiset/Bind.lean,Mathlib/Data/Nat/Cast/Field.lean,Mathlib/Data/Nat/Cast/Order/Basic.lean,Mathlib/Data/Nat/Choose/Bounds.lean,Mathlib/Data/PNat/Factors.lean,Mathlib/Data/Rat/Denumerable.lean,Mathlib/Data/Set/Pointwise/Interval.lean 135 34 ['MichaelStollBayreuth', 'YaelDillies', 'github-actions', 'leanprover-bot'] nobody
331-77435
10 months ago
331-77435
10 months ago
18-19513
18 days
19212 Julian
author:Julian
feat(LinearAlgebra): add a variable_alias for VectorSpace Taken directly from the variable_alias docs. Zulip: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/why.20.5Bvariable_alias.5D.20attribute.20is.20not.20used.20in.20Mathlib.3F --- This is the first actual variable alias added to mathlib. I haven't reviewed variable_alias fully, but it seems like there's at least 3 ways they could be distributed in Mathlib: * alongside whatever subfolder they "belong to" (which is what I've tentatively done here) * In a file called `Aliases` somewhere near the thing they alias (which seems less discoverable to me) * In a single file, a la `Mathlib.TrainingWheels` (with some less playful name) which is meant to define a bunch of more "friendly" aliases all in one place. I kind of like the idea of the third thing as a future module but perhaps it can be synthesized if/when there are more aliases? For now as I say I've done the first one, but please let me know if someone prefers something else. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
25/0 Mathlib.lean,Mathlib/LinearAlgebra/VectorSpace.lean,scripts/noshake.json 3 10 ['Julian', 'PieterCuijpers', 'github-actions', 'urkud'] nobody
311-55287
10 months ago
311-55287
10 months ago
7-68492
7 days
19337 zeramorphic
author:zeramorphic
feat(Data/Finsupp): generalise `Finsupp` to any "zero" value Remove the explicit dependence of `Finsupp` on `[Zero M]`, instead defining `Finsupp'` (better name pending) to be functions that are equal to a fixed value `z : M` cofinitely often. This PR is intended to do the initial work of replacing the definition of `Finsupp` with an instantiation of the more general definition, without adding any appropriate API. If accepted, the API development will follow in later PRs. Issues to consider: - Naming of `Finsupp'.` - Where should `Finsupp'` lemmas go? Do they need their own file/folder under `Data/`? Relevant Zulip threads: - https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Finsupp.20generalisations - https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Finsupp-like.20partial.20function Comments are welcome. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 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
309-31364
10 months ago
309-31364
10 months ago
4-60621
4 days
18756 astrainfinita
author:astrainfinita
refactor: deprecate `DistribMulActionSemiHomClass` `MulSemiringActionSemiHomClass` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
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
297-83433
9 months ago
297-83433
9 months ago
31-75259
31 days
18748 FR-vdash-bot
author:FR-vdash-bot
refactor: deprecate `ContinuousLinearMapClass` --- - [ ] depends on: #18689 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology merge-conflict
label:t-algebra$
115/49 Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/LocallyConvex/WeakOperatorTopology.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Operator/LinearIsometry.lean,Mathlib/Topology/Algebra/Module/Basic.lean,Mathlib/Topology/Algebra/Module/CharacterSpace.lean,Mathlib/Topology/Algebra/Module/FiniteDimension.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,Mathlib/Topology/Homeomorph.lean 10 5 ['FR-vdash-bot', 'github-actions', 'leanprover-bot', 'mathlib4-dependent-issues-bot'] nobody
291-47446
9 months ago
291-47449
9 months ago
0-989
16 minutes
20527 trivial1711
author:trivial1711
refactor(Topology/UniformSpace/Completion): more descriptive names for `α → Completion α` - We rename the various maps `α → Completion α` in order to make their names more consistent. - Let `α` be a uniform space. We rename the uniformly continuous function `α → Completion α` from `UniformSpace.Completion.coe'` to `UniformSpace.Completion.coe`. - Let `α` be a uniform additive group. We rename the additive group homomorphism `α →+ Completion α` from `UniformSpace.Completion.toCompl` to `UniformSpace.Completion.coeAddHom`. - Let `α` be a uniform ring. The ring homomorphism `α →+* Completion α` is called `UniformSpace.Completion.coeRingHom`; its name is unchanged. - Let `α` be a normed space over a field `𝕜`. We rename the linear isometry `α →ₗᵢ[𝕜] Completion α` from `UniformSpace.Completion.toComplₗᵢ` to `UniformSpace.Completion.coeₗᵢ`. - Let `α` be a normed space over a field `𝕜`. We rename the continuous linear map `α →L[𝕜] Completion α` from `UniformSpace.Completion.toComplL` to `UniformSpace.Completion.coeL`. - Let `α` be a normed additive group. We rename the norm preserving homomorphism `NormedAddGroupHom α (Completion α)` from `NormedAddCommGroup.toCompl` to `UniformSpace.Completion.coeNormedAddGroupHom`. - We analogously rename some other theorems. - We add some trivial theorems (all of which are proved by `rfl`) that state that the functions considered above are equal. We give all of them the `simp` and `norm_cast` attributes. - We add a new theorem `UniformSpace.Completion.coeAddHom_eq_coe` that states that `UniformSpace.Completion.coeAddHom` and `UniformSpace.Completion.coe` are equal as functions. - We similarly add a new theorem `UniformSpace.Completion.coeRingHom_eq_coe`. - We rename the theorem `UniformSpace.Completion.coe_toComplₗᵢ` to `UniformSpace.Completion.coeₗᵢ_eq_coe`. - We rename the theorem `UniformSpace.Completion.coe_toComplL` to `UniformSpace.Completion.coeL_eq_coe`. - We similarly add a new theorem `UniformSpace.Completion.coeNormedAddGroupHom_eq_coe`. - We change all occurrences of the string `((↑) : α → Completion α)` to `(coe : α → Completion α)` or just `coe`. - We put the statements of some theorems into simp normal form by using the plain function `coe` rather than the homomorphisms that carry more structure. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 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
263-44239
8 months ago
263-44239
8 months ago
6-66637
6 days
18474 FR-vdash-bot
author:FR-vdash-bot
perf: lower the priority of `*WithOne.to*` instances --- From #7873. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data slow-typeclass-synthesis t-algebra merge-conflict
label:t-algebra$
9/2 Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Data/Int/Cast/Defs.lean,Mathlib/Data/Nat/Cast/Defs.lean 3 7 ['FR-vdash-bot', 'eric-wieser', 'github-actions', 'leanprover-bot'] nobody
261-31269
8 months ago
261-31269
8 months ago
76-67978
76 days
20372 jvlmdr
author:jvlmdr
feat(MeasureTheory/Function): Add ContinuousLinearMap.bilinearCompLp(L) Introduce ContinuousLinearMap.bilinearCompLp and bilinearCompLpL. Generalize eLpNorm_le_eLpNorm_mul_eLpNorm theorems to include constant C in bound condition. --- Expect this may be useful for defining tempered distributions from functions in `L^p`. The definitions more or less follow `ContinuousLinearMap.compLp...`. Names are loosely analogous to `ContinuousLinearMap.bilinearComp` and `SchwartzMap.bilinLeftCLM`. Note: I preferred the spelling `hpqr : p⁻¹ + q⁻¹ = r⁻¹` with `f` in `L^p` and `g` in `L^q` to `hpqr : 1 / p = 1 / q + 1 / r`. It's easier to obtain from `ENNReal.IsConjExponent` too. A few questions: - [ ] I defined `bilinear{Left,Right}LpL` in addition to `bilinearCompLpL` because `LinearMap.mkContinuous₂` is marked as `noncomputable` and `LinearMap.mkContinuous` is not. Is this worth the extra definitions? (Note: This is not visible in the source due to `noncomputable section`.) - [ ] Should I use `C : ℝ` instead of `C : NNReal` for `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'`? - [ ] Is it going to be painful to have `[Fact (1 ≤ p)] [Fact (1 ≤ q)] [Fact (1 ≤ r)]`? I don't think there's a way to avoid it though. Maybe providing specialized versions for `p.IsConjExponent q` with `L^1`? Naming: - [ ] Is it satisfactory to add a `'` to the `eLpNorm_le_eLpNorm_mul_eLpNorm ` definitions in `CompareExp.lean` where `≤ ‖f x‖ * ‖g x‖` has been replaced with `≤ C * ‖f x‖ * ‖g x‖`? These could replace the existing theorems, although I don't want to break backwards compatibility. There are 5 instances: `eLpNorm_le_eLpNorm_top_mul_eLpNorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm_top'`, `eLpNorm'_le_eLpNorm'_mul_eLpNorm''`, `eLpNorm_le_eLpNorm_mul_eLpNorm_of_nnnorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'` (I'm not sure why the existing theorem `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm` has an internal `'`) - [ ] Is `bilinearLeftLpL` a suitable name? Other options: `bilinearCompLpLeftL`, `bilinearCompLeftLpL`, `bilinLeftLpL` (analogous to `SchwartzMap.bilinLeftCLM`) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability merge-conflict 203/40 Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSpace.lean 2 1 ['github-actions'] nobody
248-55526
8 months ago
248-55526
8 months ago
27-43617
27 days
18463 vihdzp
author:vihdzp
feat(SetTheory/Ordinal/Notation/FundamentalSequence): define type of fundamental sequences We define `Sequence α` as the type of sequences with length 0, 1, or `ω`, and give a basic API. A subsequent PR will introduce the notion of a (countable and computable) fundamental sequence and establish basic results. The goal of this is to generalize [`ONote.fundamentalSequence`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/SetTheory/Ordinal/Notation.html#ONote.fundamentalSequence) to allow the construction of fundamental sequences for other ordinal notations. --- See [my ordinal notation repository](https://github.com/vihdzp/ordinal-notation/blob/a6fdd7fe7cb521e686ea271902e7e5496f1804d3/OrdinalNotation/Cantor.lean#L1218) for a demonstration of how this API looks in practice. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory t-order merge-conflict 174/1 Mathlib.lean,Mathlib/SetTheory/Ordinal/Notation/Cantor.lean,Mathlib/SetTheory/Ordinal/Notation/FundamentalSequence.lean 3 19 ['YnirPaz', 'b-mehta', 'github-actions', 'vihdzp'] nobody
226-79668
7 months ago
226-79668
7 months ago
52-25108
52 days
21099 chrisflav
author:chrisflav
chore(RingTheory/Generators): use unification hints for variables and relations When working with generators and presentations, we rely on the `MvPolynomial` API, but since the type of variables is bundled in `Generators R S`, many lemmas don't apply with `rw` or `simp`, because they can't see through the definition of `vars` in constructions such as `Generators.comp` and `Generators.localizationAway`. A possible approach is to make all of these constructions `abbrev`s, but this causes `simp` to also unfold `val` which is not always desirable. More generally, it is then harder to predict how instance search and `simp` behave. This approach is tried in #21050, but causes many regressions. This approach is less invasive, as it uses `unif_hint` to unify the `vars` (and `rels`) fields of constructions with the correct type. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
231/91 Mathlib/Algebra/Module/Presentation/Differentials.lean,Mathlib/RingTheory/Generators.lean,Mathlib/RingTheory/Kaehler/JacobiZariski.lean,Mathlib/RingTheory/Presentation.lean,Mathlib/RingTheory/Smooth/StandardSmooth.lean 5 16 ['chrisflav', 'erdOne', 'github-actions', 'leanprover-bot', 'mattrobball'] nobody
222-38504
7 months ago
222-38504
7 months ago
27-75210
27 days
21339 vihdzp
author:vihdzp
fix(Data/List/Lex): remove duplicate `List.LE` instance Mathlib currently duplicates the Lean core instance for `≤` in lists in an incompatible way. We delete this duplicate instance. See [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Two.20.60List.2ELE.60.20instances.3F/near/497241115). --- This is a very quick and dirty fix. Core Lean provides all of the theorems we need to prove `≤` forms a linear order, but it provides them in terms of `Std` relation typeclasses which currently see no use in Mathlib. I've added the instances that were required to get the list theorems working. In the future, we really ought to unify the core and Mathlib relation typeclasses. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 24/22 Mathlib/Data/List/Lex.lean,Mathlib/Data/String/Basic.lean,Mathlib/Topology/Category/Profinite/Nobeling.lean 3 1 ['github-actions'] nobody
214-37396
7 months ago
214-37396
7 months ago
16-65973
16 days
21959 BGuillemet
author:BGuillemet
feat(Topology/ContinuousMap): Stone-Weierstrass theorem for MvPolynomial Add the subalgebra of multivariate polynomials and prove it separates points, on the same model as `ContinuousMap/Polynomial.lean`. Prove the Stone-Weierstrass theorem and some variations for multivariate polynomials. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology merge-conflict 285/1 Mathlib.lean,Mathlib/Topology/ContinuousMap/MvPolynomial.lean,Mathlib/Topology/ContinuousMap/StoneWeierstrass.lean 3 1 ['github-actions'] nobody
212-41547
6 months ago
212-41547
6 months ago
16-76141
16 days
22660 Ruben-VandeVelde
author:Ruben-VandeVelde
chore: follow naming convention around Group.IsNilpotent --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
133/67 Mathlib/GroupTheory/Frattini.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/SpecificGroups/ZGroup.lean 3 1 ['github-actions'] nobody
200-63802
6 months ago
200-63802
6 months ago
10-48025
10 days
22027 vihdzp
author:vihdzp
chore(SetTheory/Ordinal/FixedPoint); review `Ordinal.nfp` API This PR does the following: - add `iff` variants of various theorems, renaming some in the process - weaken some assumptions slightly - golf throughout --- - [x] depends on: #22017 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory merge-conflict 64/61 Mathlib/Logic/Equiv/List.lean,Mathlib/SetTheory/Ordinal/FixedPoint.lean 2 3 ['github-actions', 'grunweg', 'mathlib4-dependent-issues-bot'] nobody
181-21554
5 months ago
183-74914
6 months ago
43-68322
43 days
22701 ctchou
author:ctchou
feat(Combinatorics): the Katona circle method This file formalizes the Katona circle method. From PlainCombi (LeanCamCombi): https://github.com/YaelDillies/LeanCamCombi/blob/master/LeanCamCombi/PlainCombi/KatonaCircle.lean Co-authored-by: Yaël Dillies new-contributor t-combinatorics merge-conflict 121/0 Mathlib.lean,Mathlib/Combinatorics/KatonaCircle.lean 2 1 ['github-actions'] nobody
180-17316
5 months ago
180-17316
5 months ago
30-8337
30 days
23411 PatrickMassot
author:PatrickMassot
chore: remove finiteness from Order.Filter.Lift Co-authored-by: Anatole Dedecker --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) longest-pole t-topology merge-conflict 48/21 Mathlib/Dynamics/TopologicalEntropy/DynamicalEntourage.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Finite.lean,Mathlib/Order/Filter/Lift.lean,Mathlib/Order/Filter/SmallSets.lean,Mathlib/Topology/Algebra/ContinuousMonoidHom.lean,Mathlib/Topology/Basic.lean 7 4 ['Vierkantor', 'github-actions', 'kim-em', 'leanprover-community-bot-assistant'] nobody
178-64030
5 months ago
178-83599
5 months ago
10-21608
10 days
21488 imbrem
author:imbrem
feat(CategoryTheory/Monoidal): premonoidal categories Add support for premonoidal categories --- Still want to add support for: - Premonoidal braided/symmetric categories - The monoidal coherence theorem, which I've already ported in my `discretion` library - The `coherence` tactic, which should work fine for premonoidal categories too but wanted to get this in front of reviewers ASAP to make sure my general approach was alright [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory merge-conflict 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
177-49949
5 months ago
177-49950
5 months ago
58-20339
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. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory merge-conflict 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
177-49947
5 months ago
177-49949
5 months ago
43-83249
43 days
16314 FR-vdash-bot
author:FR-vdash-bot
chore(Data/Quot): deprecate `ind*'` APIs --- - [x] depends on: #16264 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 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
171-74913
5 months ago
171-74915
5 months ago
55-52030
55 days
15483 FR-vdash-bot
author:FR-vdash-bot
chore(GroupTheory/Coset): reduce defeq abuse --- - [x] depends on: #15482 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
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 ['FR-vdash-bot', 'eric-wieser', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mattrobball', 'mergify', 'urkud'] nobody
171-19806
5 months ago
419-58136
1 year ago
4-79214
4 days
20567 grunweg
author:grunweg
feat(Cache): two small features - add an informational message to the get command (when run without arguments): when more than 80% of all cache files present were not used in the last command, tell the user about the `clean` command --- - [ ] depends on #20568 (for the first feature) - [ ] TODO: re-design this feature and the clean command: if there are N local copies of mathlib, cache should have a pointer to all of them - to avoid clearing all N-1 from inside the last local copy [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 38/2 Cache/Main.lean 1 11 ['Julian', 'arthurpaulino', 'fpvandoorn', 'github-actions', 'grunweg'] nobody
169-23909
5 months ago
169-23909
5 months ago
1-17369
1 day
23859 urkud
author:urkud
feat(Topology/../Order/Field): generalize to `Semifield` .. from a linear ordered field to a linear ordered semifield--- - [ ] depends on: #23857 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 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
164-62823
5 months ago
164-62826
5 months ago
0-265
4 minutes
23810 b-reinke
author:b-reinke
chore(Order/Interval): generalize succ/pred lemmas to partial orders Many lemmas in `Mathlib/Order/Interval/Set/SuccPred.lean`and `Mathlib/Order/Interval/Finset/SuccPred.lean` also work for partial orders. They are generalized in this PR by introducing different sections for `PartialOrder` and `LinearOrder` assumptions in the respective files. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict 231/89 Mathlib/Order/Interval/Finset/SuccPred.lean,Mathlib/Order/Interval/Set/SuccPred.lean 2 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
162-39598
5 months ago
162-39600
5 months ago
16-29623
16 days
24285 madvorak
author:madvorak
chore(Algebra/*-{Category,Homology}): remove unnecessary universe variables Discussions: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Call.20for.20help.3A.20technical.2F.20organisational.20debt/with/513620128 https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Algebra.20and.20.60Type*.60/with/513558902 https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Task.2026.3A.20Replace.20Type.20u.20by.20Type*.20wherever.20possible/with/513592993 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
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
162-28295
5 months ago
162-28296
5 months ago
2-12022
2 days
24354 grunweg
author:grunweg
chore(HasFiniteIntegral): rename three lemmas Discovered in #24343. --- - [ ] depends on: #24343 (to avoid merge conflicts) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability merge-conflict 108/30 Mathlib/MeasureTheory/Function/L1Space/HasFiniteIntegral.lean 1 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
157-32699
5 months ago
157-32700
5 months ago
0-4604
1 hour
13649 FR-vdash-bot
author:FR-vdash-bot
chore: redefine `Nat.div2` `Nat.bodd` The new definitions are faster than the old ones. `Nat.binaryRec` will be moved to batteries (https://github.com/leanprover-community/batteries/pull/799) or core (https://github.com/leanprover/lean4/pull/3756), so relevant contents are moved to a new file temporarily. --- - [x] depends on: #15567 - [x] depends on: #19666 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 63/88 Mathlib/Computability/Primrec.lean,Mathlib/Data/Int/Bitwise.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Size.lean,Mathlib/Logic/Denumerable.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Nat.lean 8 15 ['FR-vdash-bot', 'digama0', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'urkud'] digama0
assignee:digama0
154-11845
5 months ago
154-11847
5 months ago
87-51692
87 days
4979 mhk119
author:mhk119
doc(Data/Nat/Bitblast): initial commit Initial commit of Bitblast.lean where we prove equivalence of bitblast unsigned less than and bitblast addition. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 202/4 Mathlib/Data/Bool/Basic.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Pow.lean 3 49 ['ChrisHughes24', 'digama0', 'goens', 'grunweg', 'j-loreaux', 'kim-em', 'mhk119'] nobody
153-70080
5 months ago
153-70080
5 months ago
7-68358
7 days
23546 JovanGerb
author:JovanGerb
feat(LinearAlgebra/AffineSpace/AffineSubspace): rename `AffineSubspace.mk'` to `Submodule.shift` In addition to renaming, I've refactored the code a bit: - `mem_mk'_iff_vsub_mem` was obsolete since it was the same as `mem_mk'`, so I removed it (this is due to a change in the definition I made recently) - I added a nonempty instance for `shift` - I added a simp lemma that `shift` isn't equal to `⊥` (the empty affine subspace). I need this for the next point. - Edit: I'll leave this for a later PR. ~I proved a simp lemma that a `shift` is parallel to a `shift` if and only if the linear subspaces are the same.~ - I renamed `mk'_eq` to `shift_direction_eq_self `. - I renamed `eq_or_eq_secondInter_of_mem_mk'_span_singleton_iff_mem` to `eq_or_eq_secondInter_iff_mem_of_mem_shift_span_singleton`. I think it is better to put the `of_mem_mk'_span_singleton` at the end of the name. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry merge-conflict 128/99 Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Geometry/Euclidean/Basic.lean,Mathlib/Geometry/Euclidean/MongePoint.lean,Mathlib/Geometry/Euclidean/PerpBisector.lean,Mathlib/Geometry/Euclidean/Sphere/SecondInter.lean,Mathlib/Geometry/Euclidean/Sphere/Tangent.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Defs.lean 7 4 ['JovanGerb', 'github-actions', 'leanprover-community-bot-assistant'] nobody
152-44827
4 months ago
152-44828
4 months ago
26-25420
26 days
9273 grunweg
author:grunweg
feat: extended charts are local diffeomorphisms on their source --- TODO: I think this should hold at any interior point - as the inverse of the extended chart, restricted to the interior of its source, will be a local inverse. The analogous result for un-extended charts is shown in #8160. Unresolved questions - are all the tiny API lemmas useful; are any more missing? - do I want similar results for `extChartAt`? (In any case, they are easy to deduce.) - [ ] depends on: #8738 for simplicity [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict 225/12 Mathlib/Geometry/Manifold/ContMDiff/Atlas.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Topology/Algebra/Module/Basic.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
148-20235
4 months ago
unknown
unknown
22837 joneugster
author:joneugster
feat(Data/Set/Basic): add subset_iff and not_mem_subset_iff Add `Set.subset_iff` for consistent API with `Finset.subset_iff`. Add `Set.not_mem_subset_iff` and `Finset.not_mem_subset_iff`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory t-data merge-conflict 9/0 Mathlib/Data/Finset/Defs.lean,Mathlib/Data/Set/Basic.lean 2 4 ['Ruben-VandeVelde', 'github-actions', 'joneugster', 'leanprover-community-bot-assistant'] nobody
131-47827
4 months ago
131-47829
4 months ago
30-35190
30 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). --- - [ ] depends on: #24570 - [ ] depends on: #24953 (I did not test the last part.) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict 58/19 Mathlib/Tactic/Linter/TextBased.lean,scripts/lint-style.lean 2 19 ['Vierkantor', 'adomani', 'github-actions', 'grunweg', 'joneugster', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] joneugster
assignee:joneugster
130-53315
4 months ago
130-53318
4 months ago
43-17409
43 days
23349 BGuillemet
author:BGuillemet
feat: add LocallyLipschitzOn.lipschitzOnWith_of_isCompact and two small lemmas about Lipschitz functions Main feat (in Mathlib/Topology/EMetricSpace/Basic.lean): if a function `f` from an extended pseudometric space to a pseudometric space is locally Lipschitz on a compact subset `s`, then `f` is Lipschitz on `s`. The theorem is true only when the codomain of `f` is a pseudometric space, so it needs imports from Mathlib/Topology/MetricSpace. Other small feat (in Mathlib/Analysis/Calculus/ContDiff/RCLike.lean): a function that is continuously differentiable on an open subset is locally Lipschitz on this subset. --- - [ ] depends on: #22890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-topology merge-conflict 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
129-35045
4 months ago
129-35047
4 months ago
35-30364
35 days
23767 grunweg
author:grunweg
refactor: make library notes a definition Make library notes a definition of `Unit` type, whose doc-string is the note's content. As a consequence, - doc-gen will display all library notes without any custom logic, - library notes are shown upon hover (via the use of the doc-string), - go do definition for library notes is easy Automate this using a macro, which also enforces that all library notes are inside the Mathlib.LibraryNote namespace. *Temporarily*, we use the `library_note2` name; if/when the batteries version is changed, we can reclaim the original name. This PR does not address how to *refer* to library notes nicely (in a way that is shown in the documentation, checked for typos, with sufficient imports ensured etc.). That is left to a future PR. This is proposal 2a from this [zulip discussion]([#mathlib4 > library notes @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/library.20notes/near/510614740)) ------------ Open questions/TODOs: - should this go in batteries instead? can the old definition just be overwritten? - otherwise, what's the best place for the `LibraryNote` definition? A single file just for this feels overkill; I put it in Mathlib.Tactic.Basic for now. I could use Mathlib.Init, of course (but that might be excessive) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-meta merge-conflict 48/48 Archive/Imo/Imo2019Q2.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/Category/Ring/Limits.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Scalar.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/HierarchyDesign.lean,Mathlib/Algebra/Order/Hom/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Note.lean,Mathlib/Analysis/RCLike/Lemmas.lean,Mathlib/CategoryTheory/Category/Basic.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/Nat/Cast/Defs.lean,Mathlib/Data/Nat/Init.lean,Mathlib/Geometry/Manifold/Algebra/Monoid.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Logic/Basic.lean,Mathlib/Tactic/Basic.lean,Mathlib/Tactic/NormNum/Basic.lean,Mathlib/Tactic/Simps/Basic.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Continuous.lean 26 9 ['adomani', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
127-48140
4 months ago
127-48142
4 months ago
51-69759
51 days
21182 joneugster
author:joneugster
fix(Util/CountHeartbeats): move elaboration in #count_heartbeats inside a namespace Currently the `#count_heartbeat` linter reported the heartbeats until it concluded `error: [declaration] has already been declared` instead of re-elaborating the declaration. --- [Zulip report](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/count_heartbeats.20for.20all.20declarations.20in.20a.20file.3F/near/496303652) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 72/5 Mathlib/Util/CountHeartbeats.lean,MathlibTest/CountHeartbeats.lean 2 17 ['adomani', 'github-actions', 'joneugster', 'leanprover-community-bot-assistant', 'mathlib-bors'] adomani
assignee:adomani
122-63793
4 months ago
122-63794
4 months ago
64-19141
64 days
25340 dupuisf
author:dupuisf
chore(Analysis/Convex): move files pertaining to convex/concave functions to their own folder This PR creates a new folder under `Analysis/Convex` called `Analysis/Convex/Function`, which includes files that are mostly or entirely about convex/concave functions (as opposed to convex sets). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry merge-conflict 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
118-57872
3 months ago
118-57874
3 months ago
6-40169
6 days
18441 ADedecker
author:ADedecker
refactor(AdicTopology): use new API for algebraic filter bases, and factor some code --- - [x] depends on: #18437 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology merge-conflict
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
106-49613
3 months ago
106-49615
3 months ago
0-679
11 minutes
18439 ADedecker
author:ADedecker
refactor: use new algebraic filter bases API in `FiniteAdeleRing` --- - [x] depends on: #18437 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology merge-conflict
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
106-49611
3 months ago
106-49613
3 months ago
0-619
10 minutes
18438 ADedecker
author:ADedecker
refactor: adapt `KrullTopology` to the new algebraic filter bases API --- - [x] depends on: #18437 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology merge-conflict
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
106-49610
3 months ago
106-49611
3 months ago
0-638
10 minutes
13964 pechersky
author:pechersky
feat(Data/DigitExpansion): begin defining variant of reals without rationals Based on a de Bruijn 1976 paper. This file is just the basic definition of a digit expansion. Will be followed up with further constructions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 518/0 Mathlib.lean,Mathlib/Data/DigitExpansion/Defs.lean,docs/references.bib 3 11 ['eric-wieser', 'github-actions', 'kim-em', 'pechersky'] dupuisf
assignee:dupuisf
103-31901
3 months ago
341-58117
11 months ago
129-57991
129 days
16074 Rida-Hamadani
author:Rida-Hamadani
feat: combinatorial maps and planar graphs We define combinatorial maps, then we define planar graph using combinatorial maps. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics merge-conflict 243/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Planar.lean,Mathlib/Data/CombinatorialMap.lean 3 28 ['Parcly-Taxel', 'Rida-Hamadani', 'github-actions', 'lambda-fairy', 'leanprover-community-bot-assistant'] kmill
assignee:kmill
90-83876
2 months ago
90-83877
2 months ago
72-51453
72 days
19796 peakpoint
author:peakpoint
feat: L'Hopital's rule from within a convex set --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis merge-conflict 190/19 Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Analysis/Calculus/LHopital.lean,Mathlib/Analysis/Convex/Topology.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Order/Interval/Set/Basic.lean 5 15 ['RemyDegenne', 'github-actions', 'leanprover-community-bot-assistant', 'peakpoint', 'sgouezel'] sgouezel
assignee:sgouezel
90-83749
2 months ago
90-83749
2 months ago
80-57750
80 days
24350 erdOne
author:erdOne
feat(FieldTheory): fg extension over perfect field is separably generated Co-authored-by: Christian Merten --- - [x] depends on: #24344 - [x] depends on: #24346 - [x] depends on: #24347 - [x] depends on: #24348 - [x] depends on: #24349 - [x] depends on: #25062 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
466/0 Mathlib.lean,Mathlib/FieldTheory/IntermediateField/Algebraic.lean,Mathlib/FieldTheory/SeparableClosure.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/RingTheory/AlgebraicIndependent/Basic.lean,Mathlib/RingTheory/AlgebraicIndependent/TranscendenceBasis.lean 6 30 ['alreadydone', 'erdOne', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
90-82971
2 months ago
90-82972
2 months ago
21-66961
21 days
24823 eric-wieser
author:eric-wieser
refactor: add `hom` lemmas for the `MonoidalCategory` structure on `ModuleCat` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
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
90-82961
2 months ago
90-82961
2 months ago
43-42841
43 days
25071 erdOne
author:erdOne
feat(EllipticCurve): basic API for singular cubics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry merge-conflict 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
90-82715
2 months ago
90-82716
2 months ago
45-4961
45 days
25283 Brian-Nugent
author:Brian-Nugent
feat: regular local rings Adds regular local rings and proves they are integral domains. --- - [ ] depends on: #25280 - [ ] depends on: #25282 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra merge-conflict
label:t-algebra$
871/0 .vscode/settings.json,Mathlib.lean,Mathlib/RingTheory/EmbeddingDimension.lean,Mathlib/RingTheory/LocalRingDimension.lean,Mathlib/RingTheory/RegularLocalRing.lean 5 6 ['Brian-Nugent', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'yuanyi-350'] nobody
90-82708
2 months ago
90-82708
2 months ago
11-84822
11 days
25573 JovanGerb
author:JovanGerb
feat: define `∃ x > y, ...` notation to mean `∃ x, y < x ∧ ...` This PR changes the elaboration of the binders `∃ x > y,` and `∀ x > y,` to use `<` instead of `>`, because we want to avoid working with `>` as much as possible (and similarly for `≥` vs `≤` ). The advantage is that we don't need to worry about rewriting with lemmas like `gt_iff_lt`. The disadvantage is that people might find this confusing. [#mathlib4 > naming convention for ≤ and < @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/naming.20convention.20for.20.E2.89.A4.20and.20.3C/near/522910464) The main changes are in `Mathlib.Init`, `Mathlib.Util.Delaborators` and `MathlibTest.delaborators`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 59/52 Counterexamples/DiscreteTopologyNonDiscreteUniformity.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/BoxIntegral/Integrability.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Complex/Liouville.lean,Mathlib/Analysis/Complex/OpenMapping.lean,Mathlib/Analysis/Fourier/PoissonSummation.lean,Mathlib/Analysis/MellinTransform.lean,Mathlib/Analysis/Normed/Operator/Banach.lean,Mathlib/Dynamics/Ergodic/Conservative.lean,Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Init.lean,Mathlib/MeasureTheory/Covering/LiminfLimsup.lean,Mathlib/MeasureTheory/Function/ConvergenceInMeasure.lean,Mathlib/MeasureTheory/Function/Egorov.lean,Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic.lean,Mathlib/MeasureTheory/Integral/DivergenceTheorem.lean,Mathlib/MeasureTheory/Integral/Layercake.lean,Mathlib/NumberTheory/LSeries/SumCoeff.lean,Mathlib/Order/Filter/AtTopBot/Finite.lean,Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/Topology/CWComplex/Classical/Finite.lean,Mathlib/Topology/ContinuousMap/Ideals.lean,Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/EMetricSpace/Paracompact.lean,Mathlib/Topology/LocallyFinite.lean,Mathlib/Topology/MetricSpace/Ultra/Basic.lean,Mathlib/Util/Delaborators.lean,MathlibTest/delaborators.lean 32 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
90-82696
2 months ago
90-82697
2 months ago
26-17604
26 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 t-algebraic-geometry merge-conflict 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
90-82403
2 months ago
90-82403
2 months ago
18-21880
18 days
26011 linesthatinterlace
author:linesthatinterlace
feat: add elementary lifts for `OneHom`, `MulHom`, `MonoidHom` and `RingHom`. This PR continues the work from #25264. Original PR: https://github.com/leanprover-community/mathlib4/pull/25264 migrated-from-branch t-algebra merge-conflict
label:t-algebra$
414/10 Mathlib/Algebra/Group/Hom/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Ring/Hom/Basic.lean,Mathlib/Algebra/Ring/Hom/Defs.lean 4 3 ['github-actions', 'leanprover-community-bot-assistant', 'linesthatinterlace'] nobody
90-82399
2 months ago
90-82400
2 months ago
17-68825
17 days
26012 linesthatinterlace
author:linesthatinterlace
feat: Low-level derivatives of lifts on `OneHom`, `MulHom` and `MonoidHom` This PR continues the work from #25290. Original PR: https://github.com/leanprover-community/mathlib4/pull/25290 migrated-from-branch t-algebra merge-conflict
label:t-algebra$
785/34 Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Hom/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Ring/Hom/Basic.lean,Mathlib/Algebra/Ring/Hom/Defs.lean 5 3 ['github-actions', 'leanprover-community-bot-assistant', 'linesthatinterlace'] nobody
90-82398
2 months ago
90-82399
2 months ago
17-68773
17 days
7596 alreadydone
author:alreadydone
feat: covering maps from properly discontinuous actions and discrete subgroups --- - [x] depends on: #23236 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-topology merge-conflict 350/21 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Complex/Circle.lean,Mathlib/Topology/Algebra/ConstMulAction.lean,Mathlib/Topology/Algebra/Group/Pointwise.lean,Mathlib/Topology/Covering/AddCircle.lean,Mathlib/Topology/Covering/Basic.lean,Mathlib/Topology/Covering/Galois.lean,Mathlib/Topology/Homotopy/Lifting.lean,Mathlib/Topology/Instances/AddCircle/Defs.lean 9 18 ['ADedecker', 'alreadydone', 'digama0', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'tb65536'] nobody
90-34579
2 months ago
90-34580
2 months ago
73-67280
73 days
24405 mcdoll
author:mcdoll
refactor(Topology/Algebra/Module/WeakDual): Clean up - Move `Dual` and `dualPairing` lower in the import-hierachy - deduplicate `dualPairing` - Make `WeakDual` and `WeakSpace` reducible --- New version of #11500 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-topology merge-conflict 146/162 Mathlib.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/LocallyConvex/WeakSpace.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Analysis/Normed/Module/WeakDual.lean,Mathlib/Analysis/VonNeumannAlgebra/Basic.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Measure/FiniteMeasure.lean,Mathlib/Topology/Algebra/Module/Dual.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,docs/overview.yaml,docs/undergrad.yaml 14 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
89-47832
2 months ago
89-47833
2 months ago
69-52361
69 days
26067 mapehe
author:mapehe
feat(Topology/StoneCech): exists_continuous_surjection_from_StoneCech_to_dense_range This lemma formalises the following version of the maximality property of the Stone–Čech compactification: If `f : α → β` is a continuous map from a topological space `α` to a Hausdorff space `β` with dense range, then there exists a continuous surjection from `StoneCech α` to `β` extending `f`. In particular, `StoneCech α` is the “largest” compact Hausdorff space into which `α` densely embeds, in the sense that any other such space is a continuous image of it. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 18/0 Mathlib/Topology/StoneCech.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
87-63781
2 months ago
87-63781
2 months ago
20-8582
20 days
24103 plp127
author:plp127
feat(Topology/UniformSpace/OfCompactT2): generalize theorem Generalize `uniformSpaceOfCompactT2` to `uniformSpaceOfCompactR1`. --- - [ ] depends on: #24098 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 48/24 Mathlib/Topology/Separation/Regular.lean,Mathlib/Topology/UniformSpace/OfCompactT2.lean 2 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
86-39556
2 months ago
86-39557
2 months ago
76-65641
76 days
24096 plp127
author:plp127
feat(Topology): Completely Regular Space iff Uniformizable Proves that `CompletelyRegularSpace`s are uniformizable and that `UniformSpace`s are completely regular. --- - [x] depends on: #24179 - [x] depends on: #24173 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 339/1 Mathlib.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/UniformSpace/Basic.lean,Mathlib/Topology/UniformSpace/Defs.lean,Mathlib/Topology/UniformSpace/Uniformizable.lean 5 10 ['alreadydone', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'plp127'] nobody
84-37083
2 months ago
84-82500
2 months ago
2-8297
2 days
26608 vihdzp
author:vihdzp
feat(SetTheory/Cardinal/Aleph): `o.card ≤ ℵ_ o` and variants --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory merge-conflict 24/0 Mathlib/SetTheory/Cardinal/Aleph.lean 1 3 ['github-actions', 'kckennylau', 'leanprover-community-bot-assistant'] nobody
70-27056
2 months ago
70-27057
2 months ago
23-63406
23 days
20719 gio256
author:gio256
feat(AlgebraicTopology): delaborators for truncated simplicial notations We add delaborators for the following notations, introduced in #20688: - `⦋m⦌ₙ`, which denotes the `m`-dimensional simplex in the `n`-truncated simplex category. - `X _⦋m⦌ₙ`, which denotes the `m`-th term of an `n`-truncated simplicial object `X`. - `X ^⦋m⦌ₙ`, which denotes the `m`-th term of an `n`-truncated cosimplicial object `X`. If `pp.proofs` is set to `true`, we also pretty-print the proof `p : m ≤ n` for all three notations as `⦋m, p⦌ₙ`, `X _⦋m, p⦌ₙ`, and `X ^⦋m, p⦌ₙ`, respectively. Credit to @kmill for one piece of code and much metaprogramming inspiration. --- - [x] depends on: #20688 - [x] depends on: #23018 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology infinity-cosmos t-meta merge-conflict 525/33 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/AlgebraicTopology/SimplicialObject/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/SimplexCategory.lean,Mathlib/Util/Superscript.lean,MathlibTest/SimplexCategory.lean,MathlibTest/SimplicialObject.lean,MathlibTest/superscript.lean,scripts/noshake.json 11 23 ['eric-wieser', 'gio256', 'github-actions', 'kim-em', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] eric-wieser
assignee:eric-wieser
64-54658
2 months ago
64-54658
2 months ago
88-84229
88 days
25238 Hagb
author:Hagb
feat(Tactic/ComputeDegree): add support for scalar multiplication with different types It would be able to deal with `a • (X : R[X])` where `a : S` is in a different type `S` with `[SMulZeroClass S R]`. --- - [x] depends on: #25237 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-meta merge-conflict 17/5 Mathlib/Tactic/ComputeDegree.lean,MathlibTest/ComputeDegree.lean 2 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
60-61043
1 month ago
60-61043
1 month ago
38-26044
38 days
11632 mattrobball
author:mattrobball
chore(Group/RingTheory.Congruence): make `Quotient`'s reducible These are essentially wrappers and should not expose any data when made reducible. Their use in constructing typeclass instances makes reducible transparency desirable. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory merge-conflict 16/35 Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/RingTheory/Congruence/Basic.lean 2 14 ['eric-wieser', 'fpvandoorn', 'github-actions', 'grunweg', 'kmill', 'leanprover-bot', 'mattrobball'] nobody
60-60990
1 month ago
60-60990
1 month ago
2-10495
2 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 --- - [ ] depends on:#18728 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 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
59-62965
1 month ago
59-62965
1 month ago
172-57747
172 days
9339 FMLJohn
author:FMLJohn
feat (RingTheory/GradedAlgebra/HomogeneousIdeal): given a finitely generated homogeneous ideal of a graded semiring, construct a finite spanning set for the ideal which only contains homogeneous elements --- - [ ] depends on: #8187 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 402/4 Mathlib.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Module/GradeZeroModule.lean,Mathlib/RingTheory/Finiteness.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousIdeal.lean,Mathlib/RingTheory/GradedAlgebra/Noetherian.lean 8 11 ['FMLJohn', 'github-actions', 'jjaassoonn', 'leanprover-community-mathlib4-bot'] nobody
59-62958
1 month ago
59-62958
1 month ago
0-0
0 seconds
26200 adomani
author:adomani
fix: add label when landrun fails Adds the `permission-denied` label on PRs that get blocked by landrun. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI merge-conflict 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
59-11996
1 month ago
59-11996
1 month ago
46-52210
46 days
27378 peakpoint
author:peakpoint
refactor(Geometry/Euclidean/Projection): redefine projection and reflection for affine subspaces This PR continues the work from #25578. Original PR: https://github.com/leanprover-community/mathlib4/pull/25578 new-contributor t-euclidean-geometry merge-conflict 316/317 Mathlib/Analysis/Normed/Affine/ContinuousAffineMap.lean,Mathlib/Analysis/Normed/Affine/Isometry.lean,Mathlib/Geometry/Euclidean/Circumcenter.lean,Mathlib/Geometry/Euclidean/Projection.lean 4 7 ['github-actions', 'jsm28', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot', 'peakpoint'] nobody
56-37206
1 month ago
56-37207
1 month ago
15-31164
15 days
27451 kckennylau
author:kckennylau
feat(RingTheory/Valuation): define ball, closed ball, and sphere *From the 2025 Local Class Field Theory Workshop.* --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 27/0 Mathlib/RingTheory/Valuation/Basic.lean 1 13 ['JovanGerb', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'pechersky', 'wwylele'] nobody
53-44499
1 month ago
53-44500
1 month ago
17-52359
17 days
27987 kckennylau
author:kckennylau
feat(RingTheory/Valuation): define ball, closed ball, and sphere --- The pullback PR of #26827 and #27451. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import merge-conflict 73/0 Mathlib/RingTheory/Valuation/Basic.lean 1 4 ['JovanGerb', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] nobody
53-44128
1 month ago
53-44129
1 month ago
6-6455
6 days
25978 Bergschaf
author:Bergschaf
feat(Order/Sublocale): Open Sublocales --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #25089 t-order merge-conflict 377/8 Mathlib.lean,Mathlib/Order/Hom/Lattice.lean,Mathlib/Order/Nucleus.lean,Mathlib/Order/Sublocale.lean,Mathlib/Order/Synonym.lean,docs/references.bib 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
52-75690
1 month ago
52-75691
1 month ago
0-1908
31 minutes
27003 eric-wieser
author:eric-wieser
chore: use `Simp.ResultQ` more often Also uses `~q` in place of manual `isDefEq` matching. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 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
51-58752
1 month ago
51-58753
1 month ago
32-70098
32 days
25483 VTrelat
author:VTrelat
chore(Data/Set/Prod, SetTheory/ZFC/Basic): add theorem prod_subset_of_prod and extend ZFC model Required by @eric-wieser in #24281 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor merge-conflict 103/0 Mathlib/Data/Set/Prod.lean,Mathlib/SetTheory/ZFC/Basic.lean 2 10 ['Ruben-VandeVelde', 'VTrelat', 'github-actions', 'leanprover-community-bot-assistant'] nobody
51-48395
1 month ago
90-82702
2 months ago
29-56208
29 days
25401 digama0
author:digama0
feat(Util): SuppressSorry option See also leanprover/lean4#8611 and [#lean4 > Silent sorry @ 💬](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/Silent.20sorry/near/503537964). This is a stop-gap solution while leanprover/lean4#8611 is underway, but it works about as well as any other built in option. Hooking declaration elaborators turns out to be a very powerful technique. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 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
51-13548
1 month ago
51-13548
1 month ago
71-28549
71 days
27953 CoolRmal
author:CoolRmal
feat(ProbabilityTheory): Conditional Jensen's Inequality This PR adds conditional Jensen's inequality. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability merge-conflict 526/14 Mathlib.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Separation.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Basic.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondJensen.lean,Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean 5 3 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
50-22791
1 month ago
50-22792
1 month ago
8-36460
8 days
19097 Vierkantor
author:Vierkantor
chore(Algebra.Polynomial): split `Polynomial/Basic.lean` into smaller files This PR splits `Mathlib.Algebra.Polynomial.Basic` into the following files: * `Polynomial/Defs.lean`: definition and ring structure on `R[X]` * `Polynomial/Module.lean`: module structure on `R[X]` * `Polynomial/Monomial.lean`: merged definition of `monomial`, `X`, `C` into the existing file (this is probably the file you want to import from now on) * `Polynomial/EraseUpdate.lean`: definition of `erase` and `update` * `Polynomial/Sum.lean`: definition of `sum` Initially I added the monomial results to a new file, but ended up merging it with `Monomial.lean` since the two of them merge cleanly. --- - [x] depends on: #28030 (going to resurrect this PR on top of that one later) - [x] depends on: #19095 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
3109/2500 Mathlib.lean,Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MonoidAlgebra/Division.lean,Mathlib/Algebra/MonoidAlgebra/Lift.lean,Mathlib/Algebra/MonoidAlgebra/MapDomain.lean,Mathlib/Algebra/MonoidAlgebra/Module.lean,Mathlib/Algebra/MonoidAlgebra/Opposite.lean,Mathlib/Algebra/MonoidAlgebra/Support.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Cardinal.lean,Mathlib/Algebra/Polynomial/Coeff.lean,Mathlib/Algebra/Polynomial/Defs.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Degree/TrailingDegree.lean,Mathlib/Algebra/Polynomial/EraseUpdate.lean,Mathlib/Algebra/Polynomial/Eval/Defs.lean,Mathlib/Algebra/Polynomial/Eval/Degree.lean,Mathlib/Algebra/Polynomial/Module.lean,Mathlib/Algebra/Polynomial/Monomial.lean,Mathlib/Algebra/Polynomial/Sum.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Finsupp/Ext.lean,Mathlib/Data/Finsupp/Fintype.lean,Mathlib/Data/Finsupp/Indicator.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Finsupp/Pointwise.lean,Mathlib/Data/Finsupp/SMulWithZero.lean,Mathlib/Data/Finsupp/Single.lean,Mathlib/Data/List/ToFinsupp.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Eigs.lean,Mathlib/RingTheory/KrullDimension/Basic.lean,Mathlib/RingTheory/Polynomial/Opposites.lean,Mathlib/RingTheory/PowerSeries/Basic.lean,Mathlib/Tactic/ExtractGoal.lean,MathlibTest/Polynomial.lean,MathlibTest/instance_diamonds.lean,scripts/noshake.json 40 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
45-56549
1 month ago
51-49334
1 month ago
0-0
0 seconds
28622 alreadydone
author:alreadydone
chore(Mathlib): replace `=>` by `↦` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 51792/51792 Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Hom/Rat.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Opposite.lean,Mathlib/Algebra/Algebra/Prod.lean,Mathlib/Algebra/Algebra/Rat.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Spectrum/Pi.lean,Mathlib/Algebra/Algebra/Spectrum/Quasispectrum.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Centralizer.lean,Mathlib/Algebra/Algebra/Subalgebra/Directed.lean,Mathlib/Algebra/Algebra/Subalgebra/IsSimpleOrder.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/Subalgebra/Matrix.lean,Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/Algebra/Subalgebra/Prod.lean,Mathlib/Algebra/Algebra/Subalgebra/Unitization.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Algebra/TransferInstance.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/AlgebraicCard.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Expect.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/BigOperators/Finsupp/Fin.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/Group/Finset/Sigma.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Defs.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Defs.lean,Mathlib/Algebra/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Algebra/BigOperators/Ring/Multiset.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/AlgCat/Monoidal.lean,Mathlib/Algebra/Category/BialgCat/Basic.lean,Mathlib/Algebra/Category/BoolRing.lean,Mathlib/Algebra/Category/CoalgCat/Basic.lean,Mathlib/Algebra/Category/CoalgCat/ComonEquivalence.lean,Mathlib/Algebra/Category/FGModuleCat/Limits.lean,Mathlib/Algebra/Category/Grp/AB.lean,Mathlib/Algebra/Category/Grp/Adjunctions.lean,Mathlib/Algebra/Category/Grp/Basic.lean,Mathlib/Algebra/Category/Grp/Biproducts.lean,Mathlib/Algebra/Category/Grp/CartesianMonoidal.lean,Mathlib/Algebra/Category/Grp/Colimits.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/Category/Grp/FilteredColimits.lean,Mathlib/Algebra/Category/Grp/Images.lean,Mathlib/Algebra/Category/Grp/Kernels.lean,Mathlib/Algebra/Category/Grp/LargeColimits.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Category/Grp/ZModuleEquivalence.lean,Mathlib/Algebra/Category/Grp/Zero.lean,Mathlib/Algebra/Category/GrpWithZero.lean,Mathlib/Algebra/Category/HopfAlgCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Biproducts.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/FilteredColimits.lean,Mathlib/Algebra/Category/ModuleCat/Images.lean,Mathlib/Algebra/Category/ModuleCat/Injective.lean,Mathlib/Algebra/Category/ModuleCat/Kernels.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Closed.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Symmetric.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pushforward.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafify.lean,Mathlib/Algebra/Category/ModuleCat/Products.lean 3838 4 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
45-17028
1 month ago
45-17029
1 month ago
0-83357
23 hours
28532 alreadydone
author:alreadydone
chore(Algebra/Ring/Defs): add two classes and extend more Add the missing `NonAssocComm(Semi)ring` and modify existing classes to `extends` more to remove some manual instances. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
89/70 Mathlib/Algebra/Colimit/DirectLimit.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Analysis/Normed/Unbundled/SpectralNorm.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Basic.lean,Mathlib/NumberTheory/SelbergSieve.lean,Mathlib/RingTheory/Localization/Integral.lean,Mathlib/RingTheory/PowerSeries/GaussNorm.lean,Mathlib/RingTheory/Valuation/Discrete/Basic.lean,Mathlib/Tactic/Ring/Basic.lean,MathlibTest/TCSynth.lean 10 17 ['alreadydone', 'eric-wieser', 'github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] nobody
44-36891
1 month ago
44-36892
1 month ago
2-77063
2 days
28626 alreadydone
author:alreadydone
chore(Archive, Counterexamples): replace => by ↦ --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 288/288 Archive/Arithcc.lean,Archive/Examples/IfNormalization/Result.lean,Archive/Examples/IfNormalization/WithoutAesop.lean,Archive/Examples/PropEncodable.lean,Archive/Imo/Imo1959Q1.lean,Archive/Imo/Imo1960Q1.lean,Archive/Imo/Imo1962Q4.lean,Archive/Imo/Imo1972Q5.lean,Archive/Imo/Imo1977Q6.lean,Archive/Imo/Imo1981Q3.lean,Archive/Imo/Imo1987Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo1998Q2.lean,Archive/Imo/Imo2001Q2.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2006Q5.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q4.lean,Archive/Imo/Imo2011Q3.lean,Archive/Imo/Imo2013Q1.lean,Archive/Imo/Imo2019Q1.lean,Archive/Imo/Imo2024Q5.lean,Archive/MiuLanguage/Basic.lean,Archive/MiuLanguage/DecisionSuf.lean,Archive/OxfordInvariants/Summer2021/Week3P1.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/AbelRuffini.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/AscendingDescendingSequences.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/BirthdayProblem.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Archive/Wiedijk100Theorems/Konigsberg.lean,Archive/Wiedijk100Theorems/Partition.lean,Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Archive/ZagierTwoSquares.lean,Counterexamples/AharoniKorman.lean,Counterexamples/CanonicallyOrderedCommSemiringTwoMul.lean,Counterexamples/CharPZeroNeCharZero.lean,Counterexamples/CliffordAlgebraNotInjective.lean,Counterexamples/DirectSumIsInternal.lean,Counterexamples/GameMultiplication.lean,Counterexamples/Girard.lean,Counterexamples/HomogeneousPrimeNotPrime.lean,Counterexamples/MapFloor.lean,Counterexamples/MonicNonRegular.lean,Counterexamples/Phillips.lean,Counterexamples/Pseudoelement.lean,Counterexamples/QuadraticForm.lean,Counterexamples/SorgenfreyLine.lean,Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean 54 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
43-46154
1 month ago
43-46155
1 month ago
2-48353
2 days
13795 astrainfinita
author:astrainfinita
perf(Algebra/{Group, GroupWithZero, Ring}/InjSurj): reduce everything --- - [ ] depends on: #15192 - [ ] depends on: #15476 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
340/194 Mathlib/Algebra/Equiv/TransferInstance.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/End.lean,Mathlib/Algebra/GroupWithZero/InjSurj.lean,Mathlib/Algebra/Module/Defs.lean,Mathlib/Algebra/Module/RingHom.lean,Mathlib/Algebra/Ring/InjSurj.lean,scripts/noshake.json 9 37 ['MichaelStollBayreuth', 'astrainfinita', 'eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mattrobball'] nobody
42-52225
1 month ago
171-67230
5 months ago
52-31623
52 days
24095 lecopivo
author:lecopivo
feat: `fun_prop` for Is(Bounded)LinearMap + notation `fun x ↦L[R] f x` Sets up `fun_prop` for `IsLinearMap` and `IsBoundedLinearMap` also adds notation `fun x ↦ₗ[R] f x` and `fun x ↦L[R] f x` to write bundled versions like lambda function instead of the currently used pointfree notation. large-import t-algebra merge-conflict
label:t-algebra$
352/22 Mathlib.lean,Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/Module/LinearMap/Pi.lean,Mathlib/Algebra/Module/LinearMap/Prod.lean,Mathlib/Analysis/Normed/Operator/BoundedLinearMaps.lean,scripts/noshake.json 8 24 ['dagurtomas', 'eric-wieser', 'github-actions', 'lecopivo', 'mathlib4-merge-conflict-bot'] dagurtomas
assignee:dagurtomas
42-31226
1 month ago
42-31227
1 month ago
85-19916
85 days
28150 Equilibris
author:Equilibris
chore: clean up proofs typevec proofs While adding variable universe corecs I found a lot of theorems in typevec that could do with a bit of a clean-up --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor merge-conflict 24/26 Mathlib/Data/TypeVec.lean 1 7 ['Equilibris', 'alexkeizer', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
42-13470
1 month ago
42-13471
1 month ago
13-49738
13 days
26478 JovanGerb
author:JovanGerb
chore(LibraryRewrite): replace `rw??` with `rw?` As suggested by @YaelDillies, now `rw?` overwrites Lean core's implementation of `rw?`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 56/49 Mathlib/Tactic/Widget/LibraryRewrite.lean,MathlibTest/LibraryRewrite.lean,MathlibTest/rewrites.lean 3 6 ['YaelDillies', 'erdOne', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] alexjbest
assignee:alexjbest
41-83625
1 month ago
41-83625
1 month ago
41-80687
41 days
27403 MoritzBeroRoos
author:MoritzBeroRoos
fix: replace probably erroneous usage of ⬝ (with old \cdot) by · (with \centerdot) Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot). Currently the abbreviations \cdot and \centerdot resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for center..). This pr replaces instances of ⬝ where · was probably meant. All of the replacement is in comments, except for the file bench_summary.lean which is used for priting the github benchmark results. Since this file is about scientific notation of numbers, sure · was meant to be used, not a rectangle. [Related](https://github.com/leanprover-community/mathlib4/pull/27399) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict 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
41-79190
1 month ago
64-55112
2 months ago
7-54661
7 days
28042 kckennylau
author:kckennylau
feat(Topology/ValuativeRel): a topological basis indexed by pairs of elements --- The pullback PR of #27314 and #27163. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 140/23 Mathlib/RingTheory/Valuation/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 2 3 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
41-79144
1 month ago
41-79144
1 month ago
7-4998
7 days
27399 MoritzBeroRoos
author:MoritzBeroRoos
chore: replace every usage of ⬝ᵥ (with old \cdot) by ·ᵥ (with \centerdot) Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot). Currently the abbreviations `\cdot` and `\centerdot` resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for `center`..): - `\cdot` gives ⬝ [U+2B1D](https://www.compart.com/en/unicode/U+2B1D) "Black Very Small Square" - `\centerdot` gives · [U+00B7](https://www.compart.com/en/unicode/U+00B7) "Middle Dot" Mathlib mostly uses the `\centerdot` variant, except for the dotProduct notation and some probably unsuspecting people wanting \centerdot but getting \cdot in their comments and 6 uses of a notation using the raw `\cdot` without any subscript at `Mathlib\Topology\Homotopy\Product.lean`. This PR replaces the dot product `⬝ᵥ` with its `\centerdot` counterpart `·ᵥ`. The related PR [here](https://github.com/leanprover/vscode-lean4/pull/639) can then overwrite the `\cdot` abbreviation, to produce the same symbol as the `centerdot` abbreviation does. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict 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
41-41022
1 month ago
64-55113
2 months ago
7-62439
7 days
25889 plp127
author:plp127
fix(Tactic/Widget/Conv): fix various issues Fixes various issues with the `conv?` widget. Closes #25162. ([Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/bug.20in.20.60conv.3F.60)) Specifically, fixes issues with `conv?` where - when converting a `SubExpr.Pos` to conv directions, it always uses the goal expression as reference, even when working on a hypothesis, this often leads to bad results and makes it unusable on hypotheses - it refuses to go all the way in to a function (for example in `Nat.succ 0`, you can't access `Nat.succ`) - it refuses to enter binders where the name of the bound variable contains the character `0` (try it on `∀ (x0 : Nat), x0 = x0`) - it panics if it can't find a binder name instead of just coming up with one itself, this also means usually you can't enter either side of a non-dependent arrow since those usually don't have binder names (try it on `False → False`) - you can't enter the type of a binder, you end up going into the body instead (try it on `fun (x : False) => (x.elim : False → Nat) x.elim`) - you can't partially enter a function, you end up going to the top argument after instead (for example, in the expression `id (id id) 0`, when you click on `id (id id)`, you end up going to `id id`) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 419/84 Mathlib/Tactic/Widget/Conv.lean,MathlibTest/conv?.lean 2 5 ['bryangingechen', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127'] bryangingechen and kmill
assignee:kmill assignee:bryangingechen
40-29315
1 month ago
40-29316
1 month ago
70-58775
70 days
23621 astrainfinita
author:astrainfinita
chore: deprecate `LinearOrderedComm{Monoid, Group}WithZero` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #20676 t-order t-algebra merge-conflict
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 n/a ['astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] kbuzzard
assignee:kbuzzard
40-24312
1 month ago
unknown
unknown
28708 sjh227
author:sjh227
feat (Data) : edit DoublyStochastic, add Stochastic to matrix edit DoublyStochastic add Stochastic --- Add the file Stochastic to matrix. Edit DoublyStochastic so that it depends on Stochastic along with a new lemma t-data new-contributor merge-conflict 249/1 Mathlib.lean,Mathlib/Data/Matrix/DoublyStochastic.lean,Mathlib/Data/Matrix/Stochastic.lean 3 26 ['github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot', 'sjh227'] nobody
37-31734
1 month ago
37-31734
1 month ago
0-78027
21 hours
27785 staroperator
author:staroperator
chore(Algebra/Group/Submonoid): golf `Nat.addSubmonoidClosure_one` using `simp` This should improve the proof readability. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra merge-conflict
label:t-algebra$
8/15 Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Order/Star/Basic.lean 3 9 ['github-actions', 'joneugster', 'leanprover-bot', 'mathlib4-merge-conflict-bot', 'staroperator'] joneugster
assignee:joneugster
36-84485
1 month ago
36-84486
1 month ago
26-34065
26 days
28148 kckennylau
author:kckennylau
feat(Matrix): Simproc and Rw-proc for Matrix Transpose Co-authored by Aaron Liu. ```lean example : !![1, 2, 3; 4, 5, 6]ᵀ = !![1, 4; 2, 5; 3, 6] := by rw [transpose_of% 2 3] example : !![1, 2, 3; 4, 5, 6]ᵀ = !![1, 4; 2, 5; 3, 6] := by rw [transpose_of] example : !![1, 2, 3; 4, 5, 6]ᵀ = !![1, 4; 2, 5; 3, 6] := by simp only [matrix_transpose] ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 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
36-84356
1 month ago
36-84357
1 month ago
16-54453
16 days
26510 alreadydone
author:alreadydone
feat(Matroid): exchange lemmas involving closure --- for #24350 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data t-combinatorics merge-conflict 37/0 Mathlib/Data/Matroid/Closure.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] kmill
assignee:kmill
36-20132
1 month ago
36-20133
1 month ago
60-26324
60 days
26912 pechersky
author:pechersky
chore(Algebra/Ring/Subring): simp tag `Subring.smul_def` s-multiplying by a subtype is easiest to manipulate when both terms are in the ambient type. Many places that had to use the _def lemma for a rewrite, or to include it in a simp set, no longer have to. Ported from #25308 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) I found this being not-simp frustrating when talking about submodules over a valuation subring. maintainer-merge t-algebra merge-conflict
label:t-algebra$
68/67 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/RootPositive.lean,Mathlib/LinearAlgebra/RootSystem/WeylGroup.lean,Mathlib/RingTheory/Etale/Kaehler.lean,Mathlib/RingTheory/LocalProperties/Projective.lean,Mathlib/RingTheory/Localization/InvSubmonoid.lean,Mathlib/RingTheory/OreLocalization/Basic.lean 25 19 ['artie2000', 'eric-wieser', 'github-actions', 'j-loreaux', 'linesthatinterlace', 'mathlib4-merge-conflict-bot', 'pechersky'] joelriou
assignee:joelriou
32-49917
1 month ago
32-49918
1 month ago
51-74059
51 days
22782 alreadydone
author:alreadydone
feat(Topology): étalé space associated to a predicate on sections --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 886/160 Mathlib.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/StructureSheaf.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Geometry/Manifold/Sheaf/Smooth.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Topology/EtaleSpace.lean,Mathlib/Topology/IsLocalHomeomorph.lean,Mathlib/Topology/Sheaves/LocalPredicate.lean,Mathlib/Topology/Sheaves/Sheafify.lean,Mathlib/Topology/Sheaves/Stalks.lean 10 16 ['AntoineChambert-Loir', 'alreadydone', 'github-actions', 'jcommelin', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] PatrickMassot
assignee:PatrickMassot
32-48286
1 month ago
59-12642
1 month ago
30-3459
30 days
27566 wwylele
author:wwylele
feat(Data/Real): Archimedean.embedReal is a ring hom when M is an ordered ring Also shows that this ends up the same as `LinearOrderedField.inducedOrderRingHom` for fields --- This is a spin-off from #27268 ~~because I got bored~~ . This is not in a high priority as I don't need it for anything yet, but the last lemma shows that `embedReal` is a generalization of `LinearOrderedField.inducedOrderRingHom` (which is only stated for field, and I didn't find when I was making the group embedding). Perhaps we should refactor `Mathlib/Algebra/Order/CompleteField.lean` with the definition here. Indeed, if we replace every `ℝ` with `(R : Type*)[ConditionallyCompleteLinearOrderedField R]` in `Data/Real/Embedding.lean`, the proof still works. What do you think? [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-data merge-conflict 220/3 Mathlib/Data/Real/Embedding.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
27-77475
27 days ago
27-77476
27 days ago
40-32085
40 days
26908 robin-carlier
author:robin-carlier
feat(CategoryTheory/Monoidal/DayConvolution): alternative ext principle for unitors Currently, our infrastructure for left/right unitors for Day convolution of functors `C ⥤ V` do not have satisfactory extensionality principle: the current way to characterize morphisms out of `U ⊛ F` is the default extensionality principle for Day convolution, which characterizes first such functors via functors out of `U ⊠ F`. Left unitors are then obtained using the fact `U ⊠ F` is a left Kan extension of a functor from `PUnit × C` (which is equivalent to `C`) but we did not record on its own this principle. Using the transitivity of left Kan extensions proved in #26899, we directly exhibit `U ⊛ F` as a left Kan extension of `F ⋙ tensorLeft (𝟙_ V)` along `tensorLeft (𝟙_ C)`. The unit of this Kan extension is composed exactly of the morphisms that appear in the [characterization of left unitors](https://leanprover-community.github.io/mathlib4_docs/Mathlib/CategoryTheory/Monoidal/DayConvolution.html#CategoryTheory.MonoidalCategory.DayConvolutionUnit.leftUnitor_hom_unit_app). We also slightly generalize the instances that express that external products with unitors are left Kan extensions, so that they can be used when taking external products with more complicated functors than currently. This is again useful when chaining extensionality lemmas for morphisms out of terms of the form `(F ⊛ U) ⊛ G`. We prove a similar thing for right unitors With this, it should be possible to have a much more satisfactory way of working with Day convolutions: this allows to "elimiinate" units without ending up with terms in an external product. --- - [ ] depends on: #26899 - [ ] depends on: #26906 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict 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
25-44302
25 days ago
25-44303
25 days ago
0-1812
30 minutes
27150 robin-carlier
author:robin-carlier
feat(CategoryTheory/Monoidal/DayConvolution): constructors for braided and symmetric structure on day convolutions monoidal categories Following the pattern in #27119, we give API to construct `BraidedCategory` and `SymmetricCategory` structures on a monoidal category equipped with a `LawfulDayConvolutionMonoidalCategoryStruct`. To achieve this, we introduce an other type class `LawfulDayConvolutionBraidedCategoryStruct` that bundles an associator isomorphism that behaves like the one constructed for functors in #27067. We provide a noncomputable constructor for this typeclass that takes as input fullness of the "realization" functor to a category of functors, and we show that the typeclasses are sufficient to define the desired structures. --- - [x] depends on: #27067 - [x] depends on: #26820 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict 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
25-39341
25 days ago
25-40129
25 days ago
0-1002
16 minutes
27119 robin-carlier
author:robin-carlier
feat(CategoryTheory/Monoidal/DayConvolution): constructors for closed monoidal day convolution monoidal structures Following the pattern introduced in #26798 and #26820 and using results of #26879, we introduce a typeclass `LawfulDayConvolutionClosedMonoidalCategoryStruct` that encodes the data needed on a `LawfulDayConvolutionMonoidalCategoryStruct` to define well-behaved internal homs. We give a constructor assuming existence of relevant ends, and prove that this data defines a `MonoidalClosed` instance on the monoidal category structures one can deduce from `LawfulDayConvolutionMonoidalCategoryStruct`. --- - [x] depends on: #27079 - [x] depends on: #27091 - [x] depends on: #26879 - [x] depends on: #26820 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict 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
24-53192
24 days ago
25-40126
25 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 --- new-contributor t-logic merge-conflict 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
24-47053
24 days ago
24-47054
24 days ago
21-3001
21 days
27933 grunweg
author:grunweg
chore(OrdNode): format code example in code blocks Wrap them in code blocks (and unindent them; that indentation is not needed any more). This also avoids warnings from the linter in #27898. ------- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 459/212 Mathlib/Data/Ordmap/Ordnode.lean 1 4 ['eric-wieser', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
20-84086
20 days ago
20-84087
20 days ago
39-69478
39 days
27508 chrisflav
author:chrisflav
feat(RingTheory): height under ring homomorphism We show that if `P` lies over `p`, the height of `P` is bounded by the height of `p` plus the height of the image of `P` in `S ⧸ p S`. In a follow-up PR, we show that equality holds if `S` satisfies going-down as an `R`-algebra. Co-authored by: Sihan Su Co-authored by: Yi Song --- - [x] depends on: #28520 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import merge-conflict 118/1 Mathlib/Data/Set/Finite/Basic.lean,Mathlib/Data/Set/Function.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Basic.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean 7 13 ['YaelDillies', 'chrisflav', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
20-26388
20 days ago
37-29309
1 month ago
1-25924
1 day
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 t-topology merge-conflict 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
18-59297
18 days ago
18-59298
18 days ago
87-79752
87 days
26890 robin-carlier
author:robin-carlier
feat(CategoryTheory/Monoidal/DayConvolution) : more API for `DayFunctor` We provide some lemmas that helps characterizing the monoidal structure on `DayFunctor`, they are special cases of the lemmas for `LawfulDayConvolutionMonoidalCategoryStruct`. --- - [ ] depends on: #26824 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict 1372/19 Mathlib.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/DayFunctor.lean 4 n/a ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
16-23089
16 days ago
unknown
unknown
26983 mans0954
author:mans0954
feat(Order/LatticeElements): distributive, standard and neutral elements of a lattice Defines distributive, standard and neutral elements of a lattice and gives equivalent conditions. --- - [ ] depends on: #26836 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict 287/0 Mathlib.lean,Mathlib/Order/Lattice.lean,Mathlib/Order/LatticeElements.lean,docs/references.bib 4 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
14-26478
14 days ago
14-26479
14 days ago
0-1136
18 minutes
29281 plp127
author:plp127
docs: `Fin.natAdd_castLEEmb` Change the docstring of `Fin.natAdd_castLEEmb` which confused me when I read it so I rewrote it. PS. this doesn't really follow the naming convention since data should be in `camelCase` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 2/3 Mathlib/Data/Fin/Embedding.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
12-51590
12 days ago
12-51591
12 days ago
18-38918
18 days
29330 plp127
author:plp127
chore: define `Fin.cycleIcc` with conditions Redefine `Fin.cycleIcc` using conditionals instead of composing existing `Fin` operations together. Its worst-case runtime drops from O(n) to O(1). As a bonus, the definition no longer needs explaining. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory merge-conflict 61/68 Mathlib/GroupTheory/Perm/Fin.lean 1 10 ['JovanGerb', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'tb65536'] nobody
9-70894
9 days ago
9-70895
9 days ago
20-39203
20 days
21950 erdOne
author:erdOne
feat(NumberTheory/Padics): the completion of `ℚ` at a finite place is `ℚ_[p]` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory merge-conflict 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
7-46004
7 days ago
88-45941
2 months ago
79-1228
79 days
28001 daefigueroa
author:daefigueroa
feat(Dynamics): add results on topologically transitive flows We define topological transitivity for a flow and show that a factor of a topologically transitive flow is topologically transitive. --- This contribution was created as part of the Utrecht Summerschool "Formalizing Mathematics in Lean" in July 2025. - [ ] depends on: #28000 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-dynamics merge-conflict 68/3 Mathlib.lean,Mathlib/Dynamics/Flow.lean,Mathlib/Dynamics/Transitive.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
5-19522
5 days ago
5-19523
5 days ago
0-4581
1 hour
27214 robin-carlier
author:robin-carlier
feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): Categorical pullback squares In this PR, we give the definition and first basic properties of categorical pullback squares. Using our previous work on `CategoricalPullback`, we define a typeclass `CatPullbackSquare T L R B` that asserts that a given `CatCommSq T L R B` is a "pullback square": this is the data of a chosen adjoint equivalence to the canonical functor from the top left corner of the square to the categorical pulback of its leg. Using this equivalence, be derive a universal property for functors from `X`with values in the top left corner of the square: they are equivalent to `CatCommSqOver R B X`, the category of categorical commutative squares over the cospan `R, B` with top left corner `X`. We prove some coherence result for this equivalence, most notably an isomorphism that, given `S : CatCommSqOver R B X`, bundles the two commutative triangles formed by the induced functor, and the coherence between the squares that these isomorphisms satisfy: this is conveniently bundled in the data of a single isomorphisms of `CatCommSqOver R B X`. Finally, we provide a `Prop`-class `IsCatPullbackSquare` that merely asserts the existence (via `Nonempty`) of the relevant data: we show that it is tautotogically equivalent to the propopsition that the canonical functor to the categorical pullback is an equivalence. --- - [ ] depends on: #26679 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict 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
4-36086
4 days ago
4-36087
4 days ago
0-5521
1 hour
26466 robin-carlier
author:robin-carlier
feat(AlgebraicTopology/SimplexCategory/Augmented): the canonical monoid object in the augmented simplex category Show that in the augmented simplex category, `⦋0⦌` is an internal monoid object. Future work will show that this is in fact the universal monoid object: for any monoidal category `C`, evaluation at `⦋0⦌` induces an equivalence of categories between `Mon_ C` and the category of monoidal functors from `AugmentedSimplexCategory` to `C`. The resulting augmented cosimplicial object one gets from this construction is sometimes called the "monoidal bar construction" attached to a monoid. This PR was split from #25743. --- - [ ] depends on: #25743 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology t-category-theory merge-conflict 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
3-55488
3 days ago
3-55490
3 days ago
0-1708
28 minutes
26578 robin-carlier
author:robin-carlier
feat(CategoryTheory/Limits/Pullbacks/Categorical/CatCospanTransform): adjunctions of categorical cospans We build upon the bicategory-like structure developed in #26447 and #26412 to define the notion of adjunctions of categorical cospans. This is a structure encoding the data of two `CatCospanTransform`s, along with the usual unit and counit morphisms as part of the data, satisfying the usual left and right triangle identities. We provide basic API for these, such as extracting adjunctions between individual components. We also provide a proof that the notion satisfies a "coherence": with our chosen constructor, the forward direction of the structure `CatCommSq` on the left adjoints correspond to the inverse of the square for the right adjoints through `mateEquiv`. These adjunctions will be used as a substrate for defining equivalences of categorical cospans in a future PR: such an equivalence will be a structure extending a `CatCospanAdjunction` with isomorphisms data on the unit and co-unit (we will however provide alternative constructors in sync with the constructor for equivalences of categories). --- - [x] depends on: #26447 - [x] depends on: #26547 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory merge-conflict 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
2-58713
2 days ago
2-61685
2 days ago
0-625
10 minutes
27882 euprunin
author:euprunin
chore: golf using `grind [Nat.cast_*]` merge-conflict 6/18 Mathlib/Analysis/SpecialFunctions/Trigonometric/Cotangent.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/EulerSineProd.lean,Mathlib/GroupTheory/CommutingProbability.lean,Mathlib/RingTheory/ZMod/UnitsCyclic.lean 4 12 ['github-actions', 'kim-em', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] urkud
assignee:urkud
1-64737
1 day ago
1-64738
1 day ago
60-4294
60 days
25042 alreadydone
author:alreadydone
feat(Topology): restriction/extension of Trivialization and composition with Homeomorph --- - [x] depends on: #25041 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 148/2 Mathlib/Topology/FiberBundle/Trivialization.lean,Mathlib/Topology/Maps/Basic.lean 2 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] ADedecker
assignee:ADedecker
1-61157
1 day ago
1-61158
1 day ago
134-68375
134 days
28243 robin-carlier
author:robin-carlier
chore(CategoryTheory/Bicategory): move some `eqToHom` lemmas The file `CategoryTheory/Bicategory/EqToHom.lean` introduced in #28242 is a more suitable hom for the lemmas `CategoryTheory.Bicategory.whiskerLeft_eqToHom` and `CategoryTheory.Bicategory.eqToHom_whiskerRight` than the current `CategoryTheory/Bicategory/Strict.lean`. We move these lemmas to the new file, and make `CategoryTheory/Bicategory/Strict` import these lemmas. --- - [ ] depends on: #28242 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict 165/23 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/EqToHom.lean,Mathlib/CategoryTheory/Bicategory/Strict.lean,Mathlib/CategoryTheory/EqToHom.lean,scripts/noshake.json 5 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'robin-carlier'] nobody
1-27226
1 day ago
1-27227
1 day ago
0-9063
2 hours
29136 YaelDillies
author:YaelDillies
feat(CategoryTheory/Monoidal): `mapMon` of a lax-braided functor is lax-braided Also move the `BraidedCategory (Mon_ C)` instance earlier in the file to avoid splitting up the functor material. I think it makes more sense like this (defining `Mon_Class`, then `Mon_`, then `Functor.mapMon`). From Toric --- - [ ] depends on: #30157 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) toric t-category-theory merge-conflict 466/404 Mathlib/Algebra/Category/CoalgCat/ComonEquivalence.lean,Mathlib/CategoryTheory/Monoidal/Grp_.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean 3 12 ['YaelDillies', 'github-actions', 'joelriou', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] TwoFX
assignee:TwoFX
0-41126
11 hours ago
0-41127
11 hours ago
29-76830
29 days

Stale new contributor PRs

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
15224 AnthonyBordg
author:AnthonyBordg
feat(CategoryTheory/Sites): covering families and their associated Grothendieck topology Define covering families on a category and their associated Grothendieck topology by using the API for `Coverage`. Give an explicit characterization of the covering sieves of the said topology. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory awaiting-author 112/0 Mathlib.lean,Mathlib/CategoryTheory/Sites/CoveringFamilies.lean 2 20 ['AnthonyBordg', 'adamtopaz', 'dagurtomas', 'github-actions', 'joelriou'] nobody
424-43442
1 year ago
429-37107
1 year ago
1-48443
1 day
14563 awueth
author:awueth
feat: if-then-else of exclusive or statement --- If `¬(P ∧ Q)` then `ite (P ∨ Q) a 1 = (ite P a 1) * (ite Q a 1)` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra awaiting-author
label:t-algebra$
5/0 Mathlib/Algebra/Group/Basic.lean 1 3 ['eric-wieser', 'github-actions', 'kim-em'] nobody
414-60818
1 year ago
414-60818
1 year ago
6-38745
6 days
11090 pangelinos
author:pangelinos
feat: define spectral spaces and prove that a quasi-compact open of a spectral space is spectral Define spectral spaces and prove that a quasi-compact open of a spectral space is spectral. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology please-adopt good first issue 69/0 Topology/Spectral/basic.lean 1 15 ['YaelDillies', 'adomani', 'j-loreaux', 'jcommelin', 'kim-em', 'pangelinos'] nobody
410-45070
1 year ago
414-57996
1 year ago
16-44803
16 days
15121 Eloitor
author:Eloitor
feat: iff theorems for IsSplitEpi and IsSplitMono in opposite category --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory awaiting-author 40/0 Mathlib/CategoryTheory/EpiMono.lean 1 3 ['github-actions', 'joelriou', 'mattrobball'] nobody
397-20562
1 year ago
428-66221
1 year ago
7-3203
7 days
16773 arulandu
author:arulandu
feat(Probability/Distributions): formalize Beta distribution Formalize Beta distribution, using Gamma distribution as a reference. Added real-valued beta wrapper, in the manner of gamma. Thanks to @EtienneC30 for help with casting real <-> complex. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability awaiting-author 286/1 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Beta.lean,Mathlib/Probability/Distributions/Beta.lean 3 48 ['EtienneC30', 'arulandu', 'github-actions', 'vihdzp'] arulandu
assignee:arulandu
378-67179
1 year ago
383-63897
1 year ago
1-21124
1 day
14603 awueth
author:awueth
feat: degree is invariant under graph isomorphism --- Mathlib has the definition `SimpleGraph.Iso.mapNeighborSet` which is an equivalence between neighbor sets induced by an isomorphism. Would it be beneficial to add the same equivalence for `neighborFinset`? [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics WIP 24/0 Mathlib/Combinatorics/SimpleGraph/Map/Finite.lean 1 11 ['awueth', 'github-actions', 'jcommelin', 'kim-em', 'urkud'] nobody
346-39564
11 months ago
346-39564
11 months ago
31-44440
31 days
18461 hannahfechtner
author:hannahfechtner
feat: left and right common multiples mixins add mixins for left and right common multiples. These carry the data of what factors are used to create the common multiples --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra awaiting-author
label:t-algebra$
78/0 Mathlib/Algebra/Group/Defs.lean 1 13 ['github-actions', 'hannahfechtner', 'jcommelin', 'kbuzzard', 'kim-em', 'trivial1711'] nobody
256-64099
8 months ago
256-64099
8 months ago
69-35596
69 days
20797 vbeffara
author:vbeffara
feat(Topology/Covering): CM version of eq_of_comp_eq Add equivalents of the lemmas `IsCoveringMap.eq_of_comp_eq` and `IsCoveringMap.const_of_comp_CM` for the case of bundled `ContinuousMap` parameters. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology easy awaiting-author 9/1 Mathlib/Topology/Covering.lean 1 4 ['github-actions', 'ocfnash', 'vbeffara'] nobody
256-50864
8 months ago
257-51817
8 months ago
2-77310
2 days
13442 dignissimus
author:dignissimus
feat: mabel tactic for multiplicative abelian groups Mabel tactic for multiplicative abelian groups (#10361) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-meta modifies-tactic-syntax awaiting-author help-wanted 439/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MAbel.lean,MathlibTest/mabel.lean 4 10 ['BoltonBailey', 'dignissimus', 'github-actions', 'joneugster', 'kbuzzard'] joneugster
assignee:joneugster
226-16627
7 months ago
230-84623
7 months ago
0-16
16 seconds
21501 sksgurdldi
author:sksgurdldi
feat(List): add sum_zipWith_eq_finset_sum ### **Description:** This PR adds the lemma `List.sum_zipWith_eq_finset_sum` to `Mathlib.Algebra.BigOperators.Group.Finset.Basic`. #### **Statement:** The sum of the `zipWith` operation on two lists equals the sum of applying the operation to corresponding elements of the two lists, indexed over the minimum of their lengths. #### **Formal Statement:** ```lean lemma sum_zipWith_eq_finset_sum [Inhabited α] [Inhabited β] [AddCommMonoid γ] {op : α → β → γ} (l : List α) (m : List β) : (List.zipWith op l m).sum = ∑ x ∈ (Finset.range (Nat.min l.length m.length)), op (l[x]!) (m[x]!) ``` #### **Remarks:** - This lemma provides a useful equivalence between `List.zipWith` and summation over a `Finset.range` indexed by `Nat.min l.length m.length`. - It can be helpful in algebraic manipulations involving list-based summations. #### **Dependencies:** No additional dependencies. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra awaiting-author
label:t-algebra$
43/0 Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean 1 1 ['github-actions', 'j-loreaux'] nobody
226-15706
7 months ago
226-15706
7 months ago
13-33168
13 days
22302 CharredLee
author:CharredLee
feat: add `CategoryTheory.Topos.Power` This is a continuation of #21281 with the end goal of defining topoi in Mathlib. It introduces the notion of a power object in a category with a subobject classifier, which is a special case of an internal hom. The definition `HasPowerObjects C` contained in this PR is all that remains before `IsTopos C` can be defined. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory awaiting-author 312/0 Mathlib.lean,Mathlib/CategoryTheory/Topos/Power.lean 2 2 ['github-actions', 'joelriou'] b-mehta
assignee:b-mehta
220-16902
7 months ago
220-18029
7 months ago
0-1528
25 minutes
22159 shetzl
author:shetzl
feat: add definition of pushdown automata Add the definition of pushdown automata and their two acceptance conditions: acceptance based on empty stack and acceptance based on final state. Co-authored-by: Tobias Leichtfried --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor awaiting-author 70/0 Mathlib.lean,Mathlib/Computability/PDA.lean 2 34 ['YaelDillies', 'github-actions', 'madvorak', 'shetzl'] nobody
200-64449
6 months ago
200-64449
6 months ago
20-81771
20 days
21903 yhtq
author:yhtq
feat: add from/toList between `FreeSemigroup` and `List` with relative theorems Add from/toList between `FreeSemigroup` and `List` with relative theorems, as well as an incidental definition of lexicographic order on `FreeSemigroup`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-algebra awaiting-CI
label:t-algebra$
169/0 Mathlib/Algebra/Free.lean 1 11 ['YaelDillies', 'github-actions'] nobody
178-79775
5 months ago
178-79775
5 months ago
51-9403
51 days
22657 Xmask19
author:Xmask19
feat: a graph is maximally acyclic iff it is a tree --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 86/0 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 6 ['Rida-Hamadani', 'b-mehta', 'github-actions', 'grunweg'] b-mehta
assignee:b-mehta
178-45432
5 months ago
178-45453
5 months ago
200-36119
200 days
22809 b-reinke
author:b-reinke
feat: Category algebras and path algebras This PR defines the category algebra of a linear category and path algebras of quivers. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra t-category-theory WIP
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
153-70846
5 months ago
153-70846
5 months ago
0-0
0 seconds
15649 TpmKranz
author:TpmKranz
feat(Computability): introduce Generalised NFA as bridge to Regular Expression Lays the groundwork for a proof of equivalence of NFA and RE, w.r.t. described language. Actual connection to NFA comes later, after the groundwork for the opposite direction has been laid. Second chunk of #12648 --- - [x] depends on: #15647 [Data.FinEnum.Option unchanged since then] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-computability new-contributor awaiting-author 298/0 Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/RegularExpressions.lean,docs/references.bib 5 6 ['github-actions', 'mathlib4-dependent-issues-bot', 'meithecatte', 'trivial1711'] nobody
151-17165
4 months ago
151-17174
4 months ago
23-54870
23 days
20648 anthonyde
author:anthonyde
feat: formalize regular expression -> εNFA The file `Computability/RegularExpressionsToEpsilonNFA.lean` contains a formal definition of Thompson's method for constructing an `εNFA` from a `RegularExpression` and a proof of its correctness. --- - [x] depends on: #20644 - [x] depends on: #20645 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-computability new-contributor 490/0 Mathlib.lean,Mathlib/Computability/RegularExpressionsToEpsilonNFA.lean,docs/references.bib 3 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'meithecatte', 'qawbecrdtey'] nobody
151-16476
4 months ago
151-17111
4 months ago
75-77754
75 days
22314 shetzl
author:shetzl
feat: add leftmost derivations for context-free grammars Leftmost derivations are often easier to reason about than arbitrary derivations. This PR adds leftmost variants of Rewrites, Produces and Derives to the existing definition of context-free grammars and proves that a string of terminals can be derived iff it can be leftmost derived. Co-authored-by: Tobias Leichtfried --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor awaiting-author 383/0 Mathlib.lean,Mathlib/Computability/LeftmostDerivation.lean 2 54 ['YaelDillies', 'github-actions', 'madvorak', 'shetzl'] YaelDillies
assignee:YaelDillies
147-61840
4 months ago
147-61840
4 months ago
72-3718
72 days
24008 meithecatte
author:meithecatte
chore(EpsilonNFA): replace manual lemmas with @[simps] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor awaiting-author 2/24 Mathlib/Computability/EpsilonNFA.lean 1 2 ['YaelDillies', 'github-actions', 'urkud'] nobody
145-62704
4 months ago
145-62704
4 months ago
27-52316
27 days
5919 MithicSpirit
author:MithicSpirit
feat: implement orthogonality for AffineSubspace Define `AffineSubspace.orthogonal` and `AffineSubspace.IsOrtho`, as well as develop an API emulating that of `Submodule.orthogonal` and `Submodule.IsOrtho`, respectively. Additionally, provide some relevant lemmas exclusive to affine subspaces, which are mostly to do with the relationship between orthogonality and `AffineSubspace.Parallel`. Closes #5539 --- Still WIP as I need to add more docstrings as well as notations for the new definitions. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis WIP help-wanted 287/0 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/AffineSubspace.lean 2 6 ['MithicSpirit', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] MithicSpirit
assignee:MithicSpirit
139-32850
4 months ago
139-32868
4 months ago
0-0
0 seconds
20238 maemre
author:maemre
feat(Computability/DFA): Closure of regular languages under some set operations This shows that regular languages are closed under complement and intersection by constructing DFAs for them. --- Closure under all other operations will be proved when someone adds the proof for DFA<->regular expression equivalence, so they are not part of this PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-computability new-contributor awaiting-author 159/0 Mathlib/Computability/DFA.lean,Mathlib/Computability/Language.lean 2 59 ['EtienneC30', 'YaelDillies', 'github-actions', 'maemre', 'meithecatte', 'urkud'] EtienneC30
assignee:EtienneC30
121-69336
3 months ago
151-17075
4 months ago
48-67492
48 days
24441 MrSumato
author:MrSumato
feat(Data/List): add Lyndon-Schutzenberger theorem on list commutativity Add Lyndon-Schutzenberger theorem on list commutativity. Included definition for List.repeatSelf that returns list repeated n times. --- This is my first mathlib PR, so any comments are highly appreciated. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor awaiting-author 129/1 Mathlib.lean,Mathlib/Data/List/Commutativity.lean,Mathlib/Data/List/Defs.lean,Mathlib/Data/List/Lemmas.lean 4 35 ['MrSumato', 'github-actions', 'grunweg', 'plp127'] grunweg
assignee:grunweg
119-51113
3 months ago
119-51113
3 months ago
29-59355
29 days
23929 meithecatte
author:meithecatte
feat(Computability/NFA): improve bound on pumping lemma --- - [x] depends on: #25321 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-computability new-contributor 101/10 Mathlib/Computability/EpsilonNFA.lean,Mathlib/Computability/NFA.lean 2 41 ['YaelDillies', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'meithecatte'] nobody
118-26727
3 months ago
118-26728
3 months ago
34-10595
34 days
22790 mhk119
author:mhk119
feat: Extend `taylor_mean_remainder_lagrange` to `x < x_0` The `taylor_mean_remainder_lagrange` theorem has the assumption that $x_0 < x$. In many applications, we need $x < x_0$ and one cannot use the current version to obtain this (see [zulip](https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Taylor's.20theorem)). This PR introduces a set of theorems that push negations through Taylor expansions so that one can extend `taylor_mean_remainder_lagrange` to the case when $x < x_0$. These theorems should also be useful elsewhere since they are quite general. new-contributor t-analysis awaiting-author 111/1 Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Lemmas.lean,Mathlib/Analysis/Calculus/Taylor.lean 3 12 ['Paul-Lez', 'github-actions', 'grunweg', 'mhk119'] nobody
115-11232
3 months ago
176-52928
5 months ago
30-77130
30 days
24395 rudynicolop
author:rudynicolop
feat(Data/List): list splitting definitions and lemmas Adds definitions and lemmas for obtaining all prefixes and suffixes of lists. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor awaiting-author 143/2 Mathlib/Data/List/Perm/Lattice.lean,Mathlib/Data/List/TakeDrop.lean 2 4 ['BoltonBailey', 'github-actions'] ericrbg
assignee:ericrbg
103-19072
3 months ago
103-19072
3 months ago
57-9536
57 days
26376 maddycrim
author:maddycrim
Simons2025 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor WIP 29/0 Mathlib/RingTheory/Localization/Pi.lean 1 1 ['github-actions'] faenuccio
assignee:faenuccio
100-45062
3 months ago
101-23535
3 months ago
0-13
13 seconds
25739 literandltx
author:literandltx
feat(NumberTheory/LegendreSymbol): Add sqrt‐of‐residue theorems for p=4k+3 and p=8k+5 Add a new file `QuadraticResidueRoots.lean` under `Mathlib/NumberTheory/LegendreSymbol/` that proves two explicit “square-root of quadratic residue” theorems for primes of the specific form. - **`exists_sqrt_of_residue_mod4_eq3`** for primes `p = 4*k + 3` - **`exists_sqrt_of_residue_mod8_eq5`** for primes `p = 8*k + 5` It also introduces the helper lemmas `euler_criterion_traditional` and `legendreSym.at_two_mod8_eq_5`. Import lines in `Mathlib.lean` and `Mathlib/NumberTheory/LegendreSymbol/Basic.lean` have been updated accordingly. new-contributor t-number-theory awaiting-author 217/0 Mathlib.lean,Mathlib/NumberTheory/LegendreSymbol/Basic.lean,Mathlib/NumberTheory/LegendreSymbol/QuadraticReciprocity.lean,Mathlib/NumberTheory/LegendreSymbol/QuadraticResidueRoots.lean 4 2 ['github-actions', 'kckennylau'] literandltx
assignee:literandltx
95-64589
3 months ago
96-7275
3 months ago
17-63153
17 days
26013 tsuki8
author:tsuki8
feat(Data/Finset/Card,Data/Set/Finite/Basic) add `card_bijOn` and `finset_subset_preimage_of_finite_image` Add `card_bijOn`: proves that for a bijection between finsets, their cardinalities are equal Add `finset_subset_preimage_of_finite_image`: constructs a finset subset preserving image cardinality Co-authored-by: Junyu Guo --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor awaiting-author 15/0 Mathlib/Data/Finset/Card.lean,Mathlib/Data/Set/Finite/Basic.lean 2 5 ['Ruben-VandeVelde', 'github-actions'] nobody
94-52964
3 months ago
94-65256
3 months ago
13-85893
13 days
27069 FrankieNC
author:FrankieNC
feat(Analysis/MetricSpace/HausdorffDimension): prove dimH of intervals and segments is 1 Add theorems `dimH_Icc01` and `dimH_segment` showing that the Hausdorff dimension of the unit interval [0,1] and of any non-degenerate real segment is 1. The key idea is that the segment is the image of [0,1] under a bi-Lipschitz map. We explicitly construct this map and prove it is both Lipschitz and antilipschitz, allowing us to transfer the dimension result from the unit interval. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology awaiting-author 63/0 Mathlib/Topology/MetricSpace/HausdorffDimension.lean 1 10 ['AntoineChambert-Loir', 'FrankieNC', 'github-actions', 'grunweg'] nobody
82-25014
2 months ago
82-37498
2 months ago
0-13398
3 hours
26962 themathqueen
author:themathqueen
feat(Data/Nat/Fib/Basic): some API for `Nat.fib` Added some helpful lemmas for `Nat.fib`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor awaiting-author 24/0 Mathlib/Data/Nat/Fib/Basic.lean 1 7 ['Ruben-VandeVelde', 'github-actions', 'themathqueen', 'vihdzp'] nobody
77-27556
2 months ago
77-27557
2 months ago
8-31586
8 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. new-contributor t-algebra awaiting-author
label:t-algebra$
465/0 Mathlib.lean,Mathlib/Algebra/Polynomial/ZMod.lean 2 2 ['Ruben-VandeVelde', 'github-actions'] nobody
69-27110
2 months ago
69-27110
2 months ago
25-6199
25 days
27297 hugh-fox
author:hugh-fox
feat: add an equality between sums and products of cartesian products Adds `prod_mul_eq_prod_product` and a version for Finsets `prod_range_mul_eq_prod_product` with to show an equality between `Fin (i * j)` and `Fin a × Fin b`. It is likely `prod_range_mul_eq_prod_product` belongs in a different file, in which case only the first commit should be considered. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra awaiting-author
label:t-algebra$
12/0 Mathlib/Algebra/BigOperators/Fin.lean 1 6 ['Ruben-VandeVelde', 'github-actions', 'hugh-fox', 'j-loreaux', 'kckennylau'] nobody
65-27634
2 months ago
69-19622
2 months ago
7-6727
7 days
14237 js2357
author:js2357
feat: Define the localization of a fractional ideal at a prime ideal Define the localization of a fractional ideal at a prime ideal, and prove some basic properties. --- This PR is part 3 out of 4 of a proof of `isDedekindDomain_iff_isDedekindDomainDvr`. Part 4 is available here: #14242 - [x] depends on: #14099 Part 1 - [x] depends on: #14216 Part 2 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra awaiting-author
label:t-algebra$
230/0 Mathlib.lean,Mathlib/RingTheory/FractionalIdeal/LocalizedAtPrime.lean,Mathlib/RingTheory/Localization/Basic.lean 3 21 ['Vierkantor', 'YaelDillies', 'github-actions', 'js2357', 'kbuzzard', 'leanprover-community-bot-assistant', 'leanprover-community-mathlib4-bot'] Vierkantor
assignee:Vierkantor
64-37436
2 months ago
64-37468
2 months ago
26-39463
26 days
27753 YunkaiZhang233
author:YunkaiZhang233
feat(CategoryTheory): implemented proofs for factorisation categories being equivalent to iterated comma categories in two ways --- Completed one of the tasks in TODOs, shown and implemented the details for (X/C)/f ≌ Factorisation f ≌ f/(C/Y). This is migrated from my previous PR #22390 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory awaiting-author 70/1 Mathlib/CategoryTheory/Category/Factorisation.lean 1 12 ['YunkaiZhang233', 'b-mehta', 'github-actions', 'robin-carlier'] nobody
63-44837
2 months ago
64-40718
2 months ago
0-3448
57 minutes
26483 metakunt
author:metakunt
feat (RingTheory/RootsOfUnity/PrimitiveRoots) : Add equiv_primitiveRoots_of_coprimePow Adds equivalence of r-th primitive roots by a coprime e. t-ring-theory new-contributor awaiting-author 79/0 Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean 1 13 ['Citronhat', 'Ruben-VandeVelde', 'github-actions', 'metakunt'] nobody
59-63538
1 month ago
59-63538
1 month ago
28-81831
28 days
26765 KiringYJ
author:KiringYJ
feat(MeasureTheory/PiSystem): add π-λ theorem and SetLike instance Add two small features to `MeasureTheory/PiSystem`: 1. SetLike instance `instance : SetLike (DynkinSystem α) (Set α)` This lets us write `s ⊆ d` and `t ∈ d` for a DynkinSystem `d`, matching usual mathlib style. 2. `DynkinSystem.pi_lambda` lemma Classical π‑λ theorem: if a π‑system `s` is contained in a Dynkin system `d`, every set measurable for `σ(s)` is also in `d`. Currently, mathlib exposes this result only indirectly (e.g. via `generateFrom_eq`). Although logically equivalent, it is not obvious at first glance that those lemmas are the π‑λ theorem. The new lemma states the result in its familiar textbook form, so users can recognise and cite it immediately. Both pieces are under 10 lines, term‑mode only, and do not modify existing APIs. No breaking changes. No dependencies. new-contributor t-measure-probability 13/0 Mathlib/MeasureTheory/PiSystem.lean 1 13 ['EtienneC30', 'KiringYJ', 'github-actions', 'ocfnash'] RemyDegenne
assignee:RemyDegenne
57-7992
1 month ago
64-44041
2 months ago
91-31879
91 days
26901 5hv5hvnk
author:5hv5hvnk
feat: a simproc version of `compute_degree` Wrap `compute_degree` in a simproc for use by simp. Closes #22219. --- new-contributor awaiting-CI t-meta awaiting-author 198/0 Mathlib.lean,Mathlib/Tactic/Simproc/PolynomialDegree.lean,MathlibTest/polynomial_degree_simproc.lean 3 18 ['5hv5hvnk', 'YaelDillies', 'adomani', 'github-actions'] nobody
53-56956
1 month ago
53-56956
1 month ago
2-71043
2 days
27850 fyqing
author:fyqing
feat: 0-dimensional manifolds are discrete and countable This is the converse direction of the classification of 0-dimensional manifolds. The other direction was shown in #22105. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-differential-geometry awaiting-author 80/0 Mathlib.lean,Mathlib/Geometry/Manifold/ZeroDim.lean 2 13 ['fyqing', 'github-actions', 'grunweg', 'tb65536'] grunweg
assignee:grunweg
53-54564
1 month ago
63-15380
2 months ago
0-6418
1 hour
27000 gasparattila
author:gasparattila
feat(Analysis/Normed/Group/Quotient): isometric versions of isomorphisms This PR adds an isometric version of the third isomorphism theorem for groups and modules. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-analysis 49/2 Mathlib/Analysis/Normed/Group/Quotient.lean 1 1 ['github-actions'] urkud
assignee:urkud
53-8004
1 month ago
84-47131
2 months ago
84-47177
84 days
27226 xcloudyunx
author:xcloudyunx
feat(Combinatorics/SimpleGraph): Add Subgraph.inclusion_edge_apply_coe and inclusion_edgeSet_apply_coe This PR continues the work from #25248. Original PR: https://github.com/leanprover-community/mathlib4/pull/25248 new-contributor t-combinatorics awaiting-author 14/0 Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 1 3 ['b-mehta', 'github-actions', 'xcloudyunx'] b-mehta
assignee:b-mehta
52-82351
1 month ago
53-10031
1 month ago
25-83942
25 days
22925 ggranberry
author:ggranberry
feat(Mathlib/PlaceHolder/ToeplitzHausdorff): Toeplitz-Hausdorff --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) will-close-soon new-contributor t-analysis awaiting-author WIP help-wanted 411/0 Mathlib/PlaceHolder/ToeplitzHausdorff.lean,Mathlib/PlaceHolder/ToeplitzHausdorff_v2.lean 2 11 ['faenuccio', 'ggranberry', 'github-actions'] faenuccio
assignee:faenuccio
51-58475
1 month ago
51-58678
1 month ago
4-24257
4 days
28198 Sebi-Kumar
author:Sebi-Kumar
feat(Analysis/InnerProductSpace/PiL2): Add instances for EuclideanSpace rank and EuclideanSpace being infinite Add an instance for `Fact (Module.finrank 𝕜 (EuclideanSpace 𝕜 (Fin n)) = n)` which is needed to apply [stereographic'](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Geometry/Manifold/Instances/Sphere.html#stereographic') to EuclideanSpace. Also add an instance for `Infinite (EuclideanSpace 𝕜 ι)` where `ι` is a nonempty fintype. I wasn't sure if these should go in separate pull requests, but they seemed similar enough to me. Thank you to Kenny Lau for the suggestions at [#mathlib4 > Instances for EuclideanSpace](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Instances.20for.20EuclideanSpace). --- To provide additional context, I am new to contributing to Mathlib, and I am doing so as a part of the Fields Undergraduate Summer Research Program at the University of Western Ontario under the supervision of Chris Kapulkin and Daniel Carranza. My goal is to contribute that the `n`-sphere is simply connected for `n > 1`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis 6/0 Mathlib/Analysis/InnerProductSpace/PiL2.lean 1 1 ['github-actions'] urkud
assignee:urkud
47-7984
1 month ago
54-21220
1 month ago
54-21260
54 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. new-contributor t-combinatorics 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 1 ['github-actions'] awainverse
assignee:awainverse
45-8007
1 month ago
56-26476
1 month ago
56-26515
56 days
28186 Sebi-Kumar
author:Sebi-Kumar
feat(Topology/Homotopy/Path): Add IsEquiv instance for Path.Homotopic Add `instance : IsEquiv (Path x₀ x₁) Homotopic` to the library. Allow use of lemmas like `of_eq` when proving two paths are homotopic. --- To provide additional context, I am relatively new to contributing to Mathlib, and I am doing so as a part of the Fields Undergraduate Summer Research Program hosted at the University of Western Ontario and supervised by Chris Kapulkin and Daniel Carranza. My goal is to prove that the `n`-sphere is simply connected for `n > 1`. Also, I am not super familiar with `IsEquiv` and when it should/shouldn't be used. I just wanted to use a lemma like `Path.Homotopic.of_eq` at one point while working on my code, and thought this was the best way to add such a result to the library. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology 5/0 Mathlib/Topology/Homotopy/Path.lean 1 4 ['Sebi-Kumar', 'github-actions', 'kckennylau'] PatrickMassot
assignee:PatrickMassot
45-8004
1 month ago
54-39334
1 month ago
54-39376
54 days
28812 yury-harmonic
author:yury-harmonic
feat(PNat/Factors): add attrs and lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 42/0 Mathlib/Data/PNat/Factors.lean 1 1 ['github-actions'] nobody
41-43612
1 month ago
41-43768
1 month ago
41-43803
41 days
27245 rirarika
author:rirarika
feat: multivariate polynomial ring properties about irreducibility --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra
label:t-algebra$
88/0 Mathlib.lean,Mathlib/Algebra/MvPolynomial/Irreducible.lean 2 5 ['alreadydone', 'github-actions', 'mbkybky'] alreadydone
assignee:alreadydone
41-40801
1 month ago
77-69247
2 months ago
77-69284
77 days
27479 iu-isgood
author:iu-isgood
feat: Abel's Binomial Theorem We have formalized Abel's Binomial Theorem as part of an REU project. There are a few remaining sorrys, but we will finish them soon. I will edit this PR message later according to community rules. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor awaiting-author 326/0 Mathlib/Data/Nat/Choose/AbelBinomial.lean 1 28 ['ElifUskuplu', 'FrankieNC', 'github-actions', 'iu-isgood'] nobody
41-40783
1 month ago
65-18680
2 months ago
0-533
8 minutes
28215 5hv5hvnk
author:5hv5hvnk
Draft PR, for Strong and Weak connectivity for Digraphs strong and weak connectivity in Digraphs --- Should resolve a part of issue #26771 Main additions in the PR: 1. Walks in Digraphs (Walk.lean) - Basic walk structure with start and end vertices - Support for walk operations: append, reverse, length - Support functions: getVert, copy, support 2. Walk Decompositions (WalkDecomp.lean) - takeUntil and dropUntil functions to split walks - rotate operation for loop walks - Theorems relating to walk decomposition properties 3. Subgraphs (subgraph.lean) - Subgraph structure for digraphs - Induced and spanning subgraph predicates - Lattice structure (sup, inf, top, bot) - Coercion to standalone digraphs 4. Paths (Paths.lean) - Trail, Path, Circuit, Cycle definitions - Path structure with no repeating vertices - Theorems relating different path types - Basic connectivity definitions (reachable, weakly/strongly connected) 5. Connectivity (Connected.lean) - Reachability relations and properties - Strong and weak connectivity definitions - Connected component types: - StronglyConnectedComponent - WeaklyConnectedComponent - ConnectedComponent - Component properties and equivalence relations --> [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics awaiting-author 1216/0 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 5 3 ['github-actions', 'grunweg'] nobody
41-39366
1 month ago
41-39366
1 month ago
12-41939
12 days
28766 yury-harmonic
author:yury-harmonic
feat(Nat/Factorial): add tail-recursive versions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 58/1 Mathlib/Data/Nat/Factorial/Basic.lean 1 1 ['github-actions', 'plp127'] nobody
41-7291
1 month ago
42-73779
1 month ago
42-73824
42 days
24333 xcloudyunx
author:xcloudyunx
feat(Combinatorics/SimpleGraph): cycle graph implementation for generic vertex types The existing `cycleGraph` implementation under Combinatorics/SimpleGraph/Circulant.lean only operates over `Fin n`. This PR implements a cycle graph implementation over any generic vertex type. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics awaiting-author 187/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Cycle.lean 2 41 ['IvanRenison', 'github-actions', 'vlad902'] kmill
assignee:kmill
39-68842
1 month ago
39-68842
1 month ago
123-22718
123 days
27155 Pjotr5
author:Pjotr5
feat: Shearer's bound on the independence number of triangle free graphs I added the file IndependenceNumber.lean to the Mathlib.Combinatorics.SimpleGraph.Triangle folder. It contains a proof of a theorem by Shearer on the independence number of triangle-free graphs . I was told this might be useful to add to Mathlib a Zullip thread linked [here](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Convexity.20of.20a.20specific.20function/with/510469526). I tried to comply as much as I could with the Mathlib style guide, but I realise that there is probably still a significant amount of editing to be done. For one thing: there are probably some lemmas and theorems in there that might be better suited in other files, but since this is my first PR I though I would all put it in one file before starting to edit a bunch of files. I was also advised to split up the file into multiple smaller PRs, but since everything is basically serving this one proof I could not really find a natural way to do that. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics awaiting-author 1266/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/IndependenceNumber.lean 2 9 ['Pjotr5', 'github-actions', 'grunweg'] nobody
38-71810
1 month ago
41-40019
1 month ago
39-17587
39 days
27242 hugh-fox
author:hugh-fox
feat: add Gauss-like formula for sums of digit sums Adds `sum_digit_sum_base_pow_eq` to show a Gauss-like formula across sums of digit sums. This relies on an additional two simp lemmas, named `digits_sum_eq_self`, `digits_sum_base_mul_cancel`. Lastly, includes a specialization (which is a good bit simpler than the general formula) to base 10 named `sum_digit_sum_ten_pow_eq`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-data new-contributor awaiting-author 113/0 Mathlib/Data/Nat/Digits/Lemmas.lean 1 5 ['github-actions', 'hugh-fox', 'kckennylau'] nobody
38-46779
1 month ago
38-46779
1 month ago
39-41606
39 days
28768 yury-harmonic
author:yury-harmonic
feat(Data/Nat): define `Nat.nthRoot` Define `Nat.nthRoot n a` to be the `n`th root of a natural number `a`. --- This is a dependency of a `norm_num` plugin that can handle `(8 : Real) ^ (2 / 3 : Real)`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 218/0 Mathlib.lean,Mathlib/Data/Nat/NthRoot/Defs.lean,Mathlib/Data/Nat/NthRoot/Lemmas.lean 3 16 ['b-mehta', 'eric-wieser', 'github-actions', 'j-loreaux', 'yury-harmonic'] nobody
38-20236
1 month ago
41-79945
1 month ago
42-34626
42 days
25225 xcloudyunx
author:xcloudyunx
feat(Combinatorics/SimpleGraph): Eulerian walk in connected graph contains all vertices --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 16/0 Mathlib/Combinatorics/SimpleGraph/Trails.lean 1 6 ['IvanRenison', 'github-actions', 'vlad902'] kmill
assignee:kmill
37-56648
1 month ago
130-13774
4 months ago
130-13821
130 days
27261 Sebi-Kumar
author:Sebi-Kumar
feat(Topology): add definition for subpaths Define subpaths as restrictions of paths to subintervals, reparameterized to have domain `[0, 1]` and possibly with a reverse of direction. Prove their basic properties. This serves as an alternative to `Path.truncate` which is useful for the explicit construction of certain homotopies, in particular regarding the concatenation of subpaths. --- To provide additional context, this is my first time contributing to Mathlib, and I am doing so as a part of the Fields Undergraduate Summer Research Program hosted at Western University. My intention for this file is for it to be used when proving that the fundamental group of the sphere is trivial (following the proof from Hatcher's "Algebraic Topology"). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology awaiting-author 146/0 Mathlib.lean,Mathlib/Topology/Subpath.lean 2 24 ['ADedecker', 'FrankieNC', 'Sebi-Kumar', 'github-actions', 'themathqueen', 'wwylele'] ADedecker
assignee:ADedecker
37-48219
1 month ago
43-16710
1 month ago
34-15767
34 days
28630 Antidite
author:Antidite
feat(Archive/Imo): right isosceles configuration in the complex plane feat(Archive/Imo): right isosceles configuration in the complex plane This adds `Archive/Imo/Imo1975Q3.lean`, formalizing a triangle configuration with points A=0, B=1, C=z and auxiliary points R, P, Q built via complex rotations and sine-based scale factors. Main results: * `angle_and_distance`: ∠QRP = π/2 and dist Q R = dist R P. * Key identity `QRP_rot90`: (Q z).z − R.z = e^{iπ/2} · ((P z).z − R.z). Design/Style: * Minimal imports; module docstring; semantic lemma names; all definitions and theorems live under the namespace `IMO.TriangleConfig`. Moves: - (none) Deletions: - (none) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO new-contributor 196/0 Archive.lean,Archive/Imo/Imo1975Q3.lean 2 36 ['Antidite', 'LLaurance', 'github-actions', 'jsm28'] jsm28
assignee:jsm28
36-38202
1 month ago
45-65365
1 month ago
45-65403
45 days
26156 oliver-butterley
author:oliver-butterley
feat(MeasureTheory.VectorMeasure) : add a definition of total variation for VectorMeasure This PR adds variation for any `VectorMeasure` using a supremum definition. Currently mathlib has `TotalVariation` defined for a signed measure using the Hahn-Jordan decomposition, but this doesn't generalise. Motivation: generally this is an important concept but specifically as a step for proving RMK in the complex case which in turn is a step to prove the spectral theorem. Co-authored-by: @yoh-tanimoto This PR was migrated from #25442. PR divided into smaller pieces, this is just the definition without additional lemmas. PRs adding further results related to variation are: * #26160 * #26165 * #26168 (shows that for `SignedMeasures` the two definitions of variation coincide) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability awaiting-author 358/0 Mathlib.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean 2 32 ['EtienneC30', 'github-actions', 'yoh-tanimoto'] EtienneC30
assignee:EtienneC30
33-47246
1 month ago
64-40366
2 months ago
42-9361
42 days
28296 strihanje01
author:strihanje01
feat(Combinatorics/Additive/VerySmallDoubling): Hamidoune's Freiman-Kneser theorem for nonabelian groups add noncommutative Freiman-Kneser theorem for doubling less than 2-\epsilon --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-combinatorics 339/3 Mathlib/Combinatorics/Additive/VerySmallDoubling.lean 1 14 ['YaelDillies', 'github-actions', 'strihanje01'] awainverse
assignee:awainverse
33-7979
1 month ago
43-51233
1 month ago
45-28077
45 days
26710 metakunt
author:metakunt
feat (Data/Nat/Digits/Lemmas): Add digits_getD Adds digits_getD, an explicit computation of the i-th digits of n in base b representation. t-data new-contributor awaiting-author 48/0 Mathlib/Data/Nat/Digits/Lemmas.lean 1 8 ['github-actions', 'pechersky', 'plp127'] nobody
32-26201
1 month ago
35-25392
1 month ago
56-72456
56 days
28602 gmcninch-tufts
author:gmcninch-tufts
feat(Algebra/Polynomial/Module): prove equivalence of a certain tensor product with PolynomialModule For a commutative ring `R` and an `R`-module `M`, construct an equivalence between the `R[X]`-modules `R[X] ⊗[R] M` and `PolynomialModule R M`. This equivalence enables application of some base-change results to `PolynomialModule R M` . --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra
label:t-algebra$
210/0 Mathlib.lean,Mathlib/Algebra/Polynomial/Module/TensorProduct.lean 2 1 ['github-actions'] jcommelin
assignee:jcommelin
32-8004
1 month ago
46-43480
1 month ago
46-43518
46 days
28906 gasparattila
author:gasparattila
feat(Topology/Algebra/Module): `prod` and `coprod` as `ContinuousLinearEquiv`s --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology 36/5 Mathlib/Topology/Algebra/Module/LinearMapPiProd.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean 2 1 ['github-actions'] jcommelin
assignee:jcommelin
30-8010
1 month ago
39-34577
1 month ago
39-34612
39 days
26790 FlAmmmmING
author:FlAmmmmING
feat(Combinatorics/Enumerative/Bell.lean): define standard Bell number --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 46/1 Mathlib/Combinatorics/Enumerative/Bell.lean 1 11 ['AntoineChambert-Loir', 'FlAmmmmING', 'eric-wieser', 'github-actions', 'kckennylau', 'madvorak'] awainverse
assignee:awainverse
29-76680
29 days ago
90-39806
2 months ago
90-39846
90 days
26986 WangYiran01
author:WangYiran01
feat(Partition): add bijection for partitions with max part ≤ r ## Summary 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. ## Implementation notes - The proof uses `Multiset.erase` and `Multiset.cons` with basic properties of `sum`, `sup`, and `Partition` structures. - The bijection is implemented explicitly via `f` and `g`, and proven mutually inverse via `Subtype.ext`. ## Linting - [x] Passes `lake build` - [x] Linter clean (no commandStart or longLine issues) ## Author Contributed by Yiran Wang. new-contributor t-combinatorics 85/0 Mathlib/Combinatorics/Enumerative/Partition.lean 1 3 ['WangYiran01', 'github-actions'] b-mehta
assignee:b-mehta
29-73214
29 days ago
84-64366
2 months ago
84-64404
84 days
28613 espottesmith
author:espottesmith
feat(Combinatorics): define undirected hypergraphs This PR defines undirected hypergraphs: ``` @[ext] structure Hypergraph (α : Type*) where /-- The vertex set -/ vertexSet : Set α /-- The hyperedge set -/ hyperedgeSet : Set (Set α) /-- All hyperedges must be subsets of the vertex set -/ hyperedge_isSubset_vertexSet : ∀ ⦃e⦄, e ∈ hyperedgeSet → e ⊆ vertexSet ``` In addition to the main definition, some additional definitions and related lemmas are provided: - vertex adjacency - hyperedge adjacency - vertex "stars" - special cases (loops, empty hypergraphs, trivial hypergraphs, complete hypergraphs, simple hypergraphs, k-uniform hypergraphs, and d-regular hypergraphs) - (some) hypergraph cardinality - subhypergraphs, induced subhypergraphs, and partial hypergraphs This implementation is certainly bare-bones. I'm submitting this PR at this point, rather than when my developments are more fleshed out, because there has been some interest in others contributing to hypergraph formalization in mathlib. In the near future, goals include: - defining incidence matrices (i.e., conversion from `Hypergraph α` to `Matrix α (Set α) β` - coersion/generalization of graph as 2-uniform hypergraph - conversion of a hypergraph into its associated clique graph/two-section graph - constructing the dual of a hypergraph (note: on first blush, this appears somewhat challenging, given that we define hyperedges as `Set α` rather than some other type `β`) - rank and co-rank - walks, paths, cycles, etc. on hypergraphs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 375/0 Mathlib.lean,Mathlib/Combinatorics/Hypergraph/Basic.lean 2 52 ['b-mehta', 'espottesmith', 'github-actions', 'jt496', 'lauramonk', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
28-60457
28 days ago
28-60457
28 days ago
34-46641
34 days
29040 PMKielstra
author:PMKielstra
feat: trapezoidal rule for integration This PR defines the trapezoidal rule and proves the standard error bound on it in terms of bounds on the second derivative. I have vague plans of using this plus interval arithmetic to develop a tactic that can automatically close goals of the form `\integral x in a..b, f x < y` or similar. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability 273/0 Mathlib.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/TrapezoidalRule.lean 3 40 ['PMKielstra', 'github-actions', 'tb65536'] kex-y
assignee:kex-y
28-8007
28 days ago
37-14900
1 month ago
37-15339
37 days
26881 emo916math
author:emo916math
feat(Analysis/Calculus/Deriv/Star) A formula for `deriv (conj ∘ f ∘ conj)` Added a lemma that `deriv (conj ∘ f ∘ conj) = conj ∘ deriv f ∘ conj`, proved by cases on whether the derivative mathematically exists or not. This PR replaces [#26805](https://github.com/leanprover-community/mathlib4/pull/26805); see discussion there. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis awaiting-author 50/2 Mathlib/Analysis/Calculus/Deriv/Star.lean 1 15 ['emo916math', 'github-actions', 'j-loreaux', 'kckennylau'] j-loreaux
assignee:j-loreaux
25-42082
25 days ago
56-41636
1 month ago
31-70593
31 days
26453 jburroni
author:jburroni
feat(Data/PNat/Basic): add order-related instances to PNat Add `SuccAddOrder ℕ+` and `NoMaxOrder ℕ+` instances. This allows, for example, the use of lemmas related to `Intervals` built with ℕ+. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 31/0 Mathlib.lean,Mathlib/Data/PNat/Order.lean 2 14 ['Ruben-VandeVelde', 'eric-wieser', 'github-actions', 'jburroni', 'vihdzp'] ericrbg
assignee:ericrbg
25-33873
25 days ago
25-38877
25 days ago
95-41188
95 days
26462 PSchwahn
author:PSchwahn
feat(LinearAlgebra/Projection): add results about inverse of `Submodule.prodEquivOfIsCompl` Add two theorems `Submodule.prodEquivOfIsCompl_symm_apply` and `Submodule.prodEquivOfIsCompl_symm_add`, which are API for `Submodule.prodEquivOfIsCompl`. We believe these theorems are useful; for example, we have used their statements in a [classification formalization project](https://github.com/LieLean/LowDimSolvClassification). Co-authored by: - [Viviana del Barco](https://github.com/vdelbarc) - [Gustavo Infanti](https://github.com/GuQOliveira) - [Exequiel Rivas](https://github.com/erivas) --- I am not sure whether the `prodEquivOfIsCompl_symm_apply` theorem should be tagged with `@[simp]`; this might lead to confluence issues. Opinions are welcome! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra awaiting-author
label:t-algebra$
10/0 Mathlib/LinearAlgebra/Projection.lean 1 7 ['PSchwahn', 'github-actions', 'joelriou', 'kckennylau'] joelriou
assignee:joelriou
25-12151
25 days ago
25-43254
25 days ago
73-43225
73 days
29434 ntapiam
author:ntapiam
feat(NonAssoc/LieAdmissible): prove every ring/algebra is LieAdmissible -awaiting-author new-contributor t-algebra
label:t-algebra$
27/6 Mathlib/Algebra/NonAssoc/LieAdmissible/Defs.lean 1 1 ['github-actions'] nobody
24-69930
24 days ago
25-62706
25 days ago
25-62746
25 days
26909 gasparattila
author:gasparattila
feat(LinearAlgebra/Projectivization/Subspace): correspondence between linear and projective subspaces --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra
label:t-algebra$
69/3 Mathlib/LinearAlgebra/Projectivization/Subspace.lean 1 5 ['eric-wieser', 'gasparattila', 'github-actions'] Vierkantor
assignee:Vierkantor
24-32975
24 days ago
87-25605
2 months ago
87-25647
87 days
28286 bwangpj
author:bwangpj
feat(Geometry/Manifold/ContMDiff): basic lemmas for analytic (`C^ω`) functions Add basic lemmas relating `ContMDiff` in the `C^ω` case to being `Analytic` on charts. This is upstreamed from [https://github.com/girving/ray](https://github.com/girving/ray). Co-authored-by: Geoffrey Irving --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-differential-geometry awaiting-author 36/0 Mathlib/Geometry/Manifold/ContMDiff/Defs.lean 1 13 ['bwangpj', 'girving', 'github-actions', 'grunweg', 'kbuzzard', 'sgouezel'] sgouezel
assignee:sgouezel
24-26906
24 days ago
24-67341
24 days ago
27-76128
27 days
25778 thefundamentaltheor3m
author:thefundamentaltheor3m
feat: Monotonicity of `setIntegral` for nonnegative functions This PR makes it easier to prove monotonicity of the Bochner integral on sets for nonnegative functions by removing the stronger assumption required by the general monotonicity lemma that both of the functions being compared must be integrable. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability awaiting-author 8/0 Mathlib/MeasureTheory/Integral/Bochner/Set.lean 1 6 ['RemyDegenne', 'github-actions', 'sgouezel', 'thefundamentaltheor3m'] nobody
22-42775
22 days ago
113-50608
3 months ago
0-11893
3 hours
26039 tsuki8
author:tsuki8
feat(RingTheory/MvPolynomial/MonomialOrder): leadingTerm define the leadingTerm and prove some lemmas related to the def `leadingTerm`: the leading term of `f` for the monomial ordering `m` some basic lemmas about leadingTerm including: 1. `leadingTerm_eq_zero_iff` 2. `leadingTerm_image_sdiff_singleton_zero` 3. `leadingTerm_image_insert_zero` 4. `leadingTerm_zero` 5. `leadingTerm_degree_eq` 6. `leadingTerm_degree_eq'` some lemmas about the degree of `f - m.leadingTerm f`: 1. `degree_sub_leadingTerm` 2. `degree_sub_leadingTerm_lt_degree` 3. `degree_sub_leadingTerm_lt_iff` Co-authored-by: Junyu Guo @Hagb --- - [ ] depends on: #24361 - [ ] depends on: #26148 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor awaiting-author 99/1 Mathlib/RingTheory/MvPolynomial/MonomialOrder.lean 1 20 ['Hagb', 'chrisflav', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] chrisflav
assignee:chrisflav
22-23998
22 days ago
22-23998
22 days ago
12-45707
12 days
27292 gasparattila
author:gasparattila
feat: asymptotic cone of a set This PR defines the asymptotic cone of a set in a normed affine space and proves its main properties. This is partial progress towards showing that an unbounded finite-dimensional convex set contains a ray. --- - [x] depends on: #27221 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge new-contributor t-analysis 466/0 Mathlib.lean,Mathlib/Analysis/Normed/Affine/AsymptoticCone.lean,Mathlib/Order/Filter/Map.lean,Mathlib/Topology/Algebra/AsymptoticCone.lean 4 45 ['AntoineChambert-Loir', 'YaelDillies', 'gasparattila', 'github-actions', 'mathlib4-dependent-issues-bot'] YaelDillies
assignee:YaelDillies
16-75947
16 days ago
59-37840
1 month ago
73-55374
73 days
29437 NotWearingPants
author:NotWearingPants
feat(Data/Seq): add Seq.subsequence and prove basic theorems about it I added `Seq.subsequence` to compose a sequence with a monotone function, creating a subsequence. Aliased to `Seq.comp` since it's a composition. I also added `Nat.le_induction_step_iff` which is needed to prove a subsequence is a sequence. This proves the comment at the top of `Defs.lean` that says "if `f n = none`, then `f m = none` for all `m ≥ n`" while `IsSeq` only talks about `n+1`. For completion I added the same statement for `Int`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-data new-contributor 114/0 Mathlib/Data/Int/Init.lean,Mathlib/Data/Nat/Init.lean,Mathlib/Data/Seq/Basic.lean,Mathlib/Data/Seq/Defs.lean 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
16-55191
16 days ago
16-55212
16 days ago
25-42703
25 days
26129 LessnessRandomness
author:LessnessRandomness
feat(Geometry/Euclidean/Angle/Unoriented): triangle inequality for angles This PR continues the work from #24206. Original PR: https://github.com/leanprover-community/mathlib4/pull/24206 new-contributor t-euclidean-geometry 203/16 Mathlib.lean,Mathlib/Analysis/Fourier/FiniteAbelian/Orthogonality.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Affine.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Basic.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/TriangleInequality.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean 8 76 ['JovanGerb', 'LessnessRandomness', 'Timeroot', 'github-actions', 'jsm28', 'mathlib4-merge-conflict-bot', 'themathqueen'] jsm28
assignee:jsm28
16-36028
16 days ago
29-12745
29 days ago
104-40538
104 days
29776 yuanyi-350
author:yuanyi-350
chore(Functional Analysis) : refactor `ContinuousLinearMap.isOpenMap` by separating it into sublemmas The open mapping theorem in mathlib proves A ⇒ C by first proving A ⇒ B and then B ⇒ C in one theorem. In my PR, I separated it into two theorems: A ⇒ B and B ⇒ C. And now B ⇒ C is more general, with weaker assumptions than A ⇒ C. The [open mapping theorem](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Normed/Operator/Banach.html#ContinuousLinearMap.isOpenMap) in mathlib need `f` to be surjective. However, this can be weakened to the condition `h : ∃ (n : ℕ) (x : _), x ∈ interior (closure (f '' ball 0 n))` . I need this stronger formulation to prove the closed range theorem c.f. *Rudin Functional Analysis Thm 4.13* [zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/refactor.20.60ContinuousLinearMap.2EisOpenMap.60) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis awaiting-author WIP 44/24 Mathlib/Analysis/Normed/Operator/Banach.lean 1 12 ['faenuccio', 'github-actions', 'kckennylau', 'leanprover-bot', 'themathqueen', 'yuanyi-350'] faenuccio
assignee:faenuccio
12-52026
12 days ago
13-6161
13 days ago
2-46827
2 days
29744 espottesmith
author:espottesmith
feat(Combinatorics): define directed hypergraphs This PR defines directed hypergraphs: ``` @[ext] structure DiHypergraph (α : Type*) where /-- The vertex set -/ vertexSet : Set α /-- The edge set -/ edgeSet : Set ((Set α) × (Set α)) /-- Each edge is a pair (s, d), where s ⊆ vertexSet and d ⊆ vertexSet -/ edge_src_dst_isSubset_vertexSet' : ∀ ⦃e⦄, e ∈ edgeSet → e.1 ⊆ vertexSet ∧ e.2 ⊆ vertexSet ``` Additional definitions: - tail/head stars and negative/positive stars - some special cases (B-Graph, F-Graph, BF-Graph, and what I'm calling a "non-endless" dihypergraph, where neither the source/tail nor the destination/head are empty) - Vertex and (hyper)edge adjacency - isolated vertices - empty and nonempty dihypergraphs The design employed here is based off of #28613, but this PR does not depend on that one. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 391/0 Mathlib.lean,Mathlib/Combinatorics/DiHypergraph/Basic.lean 2 1 ['github-actions'] nobody
11-50470
11 days ago
16-57003
16 days ago
16-57050
16 days
29827 js2357
author:js2357
feat: define two (trivial) ContinuousMulEquivs Define two trivial `ContinuousMulEquiv`s: `ContinuousMulEquiv.piUnique` is the topological version of `MulEquiv.piUnique`. `ContinuousMulEquiv.piEquivPiSubtypeProd` is the multiplicative version of `Homeomorph.piEquivPiSubtypeProd`. Done for the FLT project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import FLT new-contributor t-topology 25/0 Mathlib/Topology/Algebra/ContinuousMonoidHom.lean 1 2 ['github-actions', 'grunweg'] nobody
11-22954
11 days ago
13-60091
13 days ago
14-2275
14 days
29458 LiamSchilling
author:LiamSchilling
feat(MvPolynomial/WeightedHomogenous): relate `weightedTotalDegree` to `degrees`, `totalDegree`, and `degreeOf` `weightedTotalDegree` is the most general notion of multivariate degree in mathlib. These theorems show that it specializes to `degrees`, `totalDegree`, and `degreeOf` with specialized weights. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor awaiting-author 24/1 Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean 1 5 ['chrisflav', 'github-actions'] chrisflav
assignee:chrisflav
10-61039
10 days ago
10-61039
10 days ago
14-19311
14 days
26660 strihanje01
author:strihanje01
feat(Combinatorics/Additive/VerySmallDoubling): weak non-commutative Kneser's theorem add theorem about the structure of a doubling smaller than the golden ratio --- - [x] depends on: #28653 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import maintainer-merge new-contributor t-combinatorics 215/41 Mathlib/Algebra/Group/Action/Pointwise/Finset.lean,Mathlib/Combinatorics/Additive/VerySmallDoubling.lean 2 79 ['YaelDillies', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'strihanje01'] YaelDillies
assignee:YaelDillies
10-50518
10 days ago
10-83167
10 days ago
52-25145
52 days
28175 dsfxcimk
author:dsfxcimk
feat: exterior angle theorem Add Exterior angle theorem --- The Exterior Angle Theorem states that the exterior angle of a triangle equals the sum of the two non-adjacent interior angles. I plan to place this in Mathlib.Geometry.Euclidean.Triangle [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-euclidean-geometry awaiting-author 10/0 Mathlib/Geometry/Euclidean/Triangle.lean,docs/1000.yaml 2 16 ['FrankieNC', 'JovanGerb', 'dsfxcimk', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'themathqueen'] nobody
10-37862
10 days ago
24-50729
24 days ago
28-57160
28 days
28818 NotWearingPants
author:NotWearingPants
feat(Data/Setoid/Basic): add theorems about lifting a function to its kernel Currently `ker_lift_injective` and `quotientKerEquivOfRightInverse` lift `f` to `ker f` in their definition. This PR makes this function available as `Setoid.ker_lift f` and adds a few more theorems about it. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor easy 29/15 Counterexamples/AharoniKorman.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/FundamentalCone.lean,Mathlib/Topology/Separation/Hausdorff.lean 4 18 ['NotWearingPants', 'eric-wieser', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] nobody
10-11015
10 days ago
21-31499
21 days ago
39-46440
39 days
27817 zhuyizheng
author:zhuyizheng
feat: add IMO2025P1 Add a solution to IMO2025P1, the original problem statement from https://github.com/jsm28/IMOLean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO new-contributor 1310/0 Archive.lean,Archive/Imo/Imo2025Q1.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] dwrensha
assignee:dwrensha
9-57521
9 days ago
14-76993
14 days ago
47-15701
47 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. new-contributor t-analysis awaiting-author 383/0 Mathlib/Analysis/Complex/Residue/Basic.lean 1 17 ['Periecle', 'github-actions', 'hrmacbeth', 'llllvvuu', 'loefflerd'] nobody
9-46253
9 days ago
20-48356
20 days ago
1-5255
1 day
26071 linesthatinterlace
author:linesthatinterlace
feat: Add `id` and `comp` classes for `FunLike` and `refl`, `trans` and `symm` classes for `EquivLike` Adds classes depending on `FunLike` that capture "this has an identity/this has a notion of composition". --- This is a prototype and comments on this are requested. I think a similar model could be used to create a generalisation for Equiv.symm. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor RFC WIP 314/23 Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/FunLike/Equiv.lean,Mathlib/Logic/Equiv/Defs.lean 3 21 ['Rob23oba', 'github-actions', 'leanprover-community-bot-assistant', 'linesthatinterlace'] nobody
9-42520
9 days ago
9-42576
9 days ago
0-1
1 second
28871 JaafarTanoukhi
author:JaafarTanoukhi
feat(Combinatorics/Digraph): Tournaments Define orientations and tournaments. Related to #26771. Co-authored-by: Rida Hamadani --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 62/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Orientation.lean,Mathlib/Combinatorics/Digraph/Tournament.lean 3 5 ['JaafarTanoukhi', 'NotWearingPants', 'Rida-Hamadani', 'github-actions'] kmill
assignee:kmill
9-37654
9 days ago
40-27891
1 month ago
40-27927
40 days
28967 utkuokur
author:utkuokur
refactor(Combinatorics/SimpleGraph/Walk): simplify proof of "support_tail_of_not_nil" The proof of the lemma named "support_tail_of_not_nil" is shortened. Since "support_tail" is not needed anymore, it is removed. @[deprecated (since := "2025-08-26")] sign is added for the removed "support_tail". The library references to "support_tail" are replaced with "support_tail_of_not_nil". To keep [@simp] on "cons_support_tail" and avoid the linter error, the [@simp] of "support_tail_of_not_nil" (previously on "support_tail") is removed. There might be a better way that I am missing, to deal with the linter error. --- Additionally, a merge conflict with `master` was resolved by keeping the generalized `support_tail_of_not_nil` and reintroducing `support_tail` as a deprecated alias for compatibility. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 7/10 Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Walk.lean 2 3 ['github-actions', 'mathlib4-merge-conflict-bot', 'themathqueen'] awainverse
assignee:awainverse
9-28968
9 days ago
25-23140
25 days ago
38-39054
38 days
29947 JaafarTanoukhi
author:JaafarTanoukhi
feat(Combinatorics/Digraph): Maps Ported `SimpleGraph/Maps.lean` to `Digraph/Maps.lean` for future PRs related to issue #[26771](https://github.com/leanprover-community/mathlib4/issues/26771) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 476/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Maps.lean 2 1 ['github-actions'] nobody
8-64833
8 days ago
9-37936
9 days ago
9-37978
9 days
25883 pfaffelh
author:pfaffelh
feat: introduce Gram matrices A Gram matrix has entry `⟪v i, v j⟫` at `i j : n`, where `v : n → α` is an `InnerProductSpace 𝕜 α`. Give this notion and show that Gram matrices are positive semi-definite. This will be used later in order to show that the covariance matrix for Brownian Motion is positive semi-definite. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24575.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24575* migrated-from-branch new-contributor t-analysis delegated 142/2 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/GramMatrix.lean,Mathlib/MeasureTheory/Function/L2Space.lean 3 42 ['EtienneC30', 'eric-wieser', 'github-actions', 'mathlib-bors', 'pfaffelh', 'sgouezel'] hrmacbeth
assignee:hrmacbeth
8-63288
8 days ago
8-63288
8 days ago
78-69916
78 days
27229 WilliamCoram
author:WilliamCoram
feat(GroupTheory/DoubleCoset): multiple lemmas From FLT --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory FLT new-contributor 97/0 Mathlib/GroupTheory/DoubleCoset.lean 1 16 ['Ruben-VandeVelde', 'WilliamCoram', 'github-actions', 'mathlib4-merge-conflict-bot'] mariainesdff
assignee:mariainesdff
8-59034
8 days ago
15-34679
15 days ago
74-14156
74 days
29798 Cyantain
author:Cyantain
feat(FieldTheory/IsIntegrallyClosed): lemma to judge whether an element is integral In this PR, we proved that an element is integral iff it's root of irreducible polynomial with unit leading coeff, which is an easy way to judge an element is integral or not, such as $\sqrt 5 / 4$, because it's root of $16x^2-5$ with not unit leading coeff, so it's not integral. new-contributor t-algebra delegated
label:t-algebra$
13/0 Mathlib/FieldTheory/Minpoly/IsIntegrallyClosed.lean 1 8 ['Ruben-VandeVelde', 'adomani', 'github-actions', 'kckennylau', 'mathlib-bors', 'riccardobrasca'] nobody
8-51852
8 days ago
8-51852
8 days ago
6-29891
6 days
28728 or4nge19
author:or4nge19
feat(PerronFrobenius): introduce Irreducible and Primitive Matrices and relations to Quiver This PR develops a graph-theoretic interface for studying nonnegative square matrices over `ℝ` through the quiver formed by their strictly positive entries. It shows the equivalence between positivity of suitable matrix powers and existence of directed paths in this quiver. ------------ - [ ] depends on: #28696 - [ ] depends on:#29754 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-author 289/0 Mathlib.lean,Mathlib/Combinatorics/Quiver/Path/StronglyConnected.lean,Mathlib/LinearAlgebra/Matrix/Irreducible/Defs.lean 3 6 ['github-actions', 'j-loreaux', 'mathlib4-dependent-issues-bot', 'or4nge19'] nobody
7-65014
7 days ago
20-29974
20 days ago
0-32474
9 hours
29110 NotWearingPants
author:NotWearingPants
feat(Counterexamples): Euler's sum of powers conjecture feat(Counterexamples): Euler's sum of powers conjecture --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip maintainer-merge new-contributor 158/0 Counterexamples.lean,Counterexamples/EulerSumOfPowers.lean 2 43 ['MichaelStollBayreuth', 'NotWearingPants', 'eric-wieser', 'github-actions', 'tb65536', 'urkud'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
7-26967
7 days ago
7-27023
7 days ago
24-25032
24 days
12751 Command-Master
author:Command-Master
feat: add lemmas for Nat/Bits, Nat/Bitwise and Nat/Size Remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor merge-conflict 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
410-45727
1 year ago
415-61969
1 year ago
54-52408
54 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. t-data new-contributor merge-conflict please-adopt 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', 'leanprover-community-mathlib4-bot', 'urkud', 'vihdzp'] YaelDillies
assignee:YaelDillies
338-21566
11 months ago
364-76757
11 months ago
12-48560
12 days
14598 Command-Master
author:Command-Master
chore: add typeclasses to unify various `add_top`, `add_eq_top`, etc. Add the four typeclasses `IsTopAbsorbing`, `IsBotAbsorbing`, `NoTopSum`, `NoBotSum`, as additive equivalents for `MulZeroClass` and `NoZeroDivisors`. Add instances of these for `ENNReal`, `WithTop α`, `WithBot α`, `PUnit`, `EReal`, `PartENat`, `Measure`, `Interval` and `Filter`. Also split `Algebra/Order/AddGroupWithTop` to `Algebra/Order/Group/WithTop` and `Algebra/Order/Monoid/WithTop` --- Previous usages of lemmas with quantified names like `WithTop.add_top` have to be changed to just `add_top`. `add_lt_top` is `@[simp]`, in accordance with `ENNReal.add_lt_top` being `@[simp]`. This affects `WithTop.add_lt_top` which previously hadn't been `@[simp]`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order t-algebra merge-conflict
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
331-78532
10 months ago
331-78532
10 months ago
7-45599
7 days
16885 metinersin
author:metinersin
feat(ModelTheory/Complexity): define literals Defines `FirstOrder.Language.BoundedFormula.IsLiteral` and `FirstOrder.Language.BoundedFormula.simpleNot` - an auxiliary operation that takes the negation of a formula and does some simplification. --- - [x] depends on: #16800 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-logic merge-conflict awaiting-author 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
329-34653
10 months ago
329-34653
10 months ago
0-19926
5 hours
13248 hcWang942
author:hcWang942
feat: basic concepts of auction theory ## Description Formalise some core concepts and results in auction theory: this includes definitions for first-price and second-price auctions, as well as several fundamental results and helping lemmas. This is the very first PR of the project formalizing core concepts and results in auction theory. Our group is working on more contributions on the formalization of game theory prefix. Co-authored-by: Ma Jiajun ## Reference Roughgarden, Tim. ***Twenty Lectures on Algorithmic Game Theory***. Cambridge University Press, 2020. [Link](https://www.cambridge.org/core/books/twenty-lectures-on-algorithmic-game-theory/A9D9427C8F43E7DAEF8C702755B6D72B) --- - [x] Will depend on #14163 once that PR is merged. The Fintype lemmas introduced by this PR have been added in that PR and will be removed from here once that PR gets merged ## Current plan for formalization of Game Theory The current plan for the formalizing of Game Theory include: #### 1. Auction Theory. 🎉 _(200+ lines, this PR)_ - Essential definitions of Sealed-bid auction, First-price auction and Second-price auction. - First-price auction has no dominant strategy. - Second-price auction has dominant strategy. (Second-price auction is DSIC) #### 2. Mechanism design & Myerson's Lemma. 🎉 (400+ lines, pending for modification to Mathlib Standard) - Mechanism design An allocation rule is implementable if there exists - Dominant Strategy Incentive Compatible (DSIC) payment rule - An allocation rule is monotone if for every bidder’s gain is nondecreasing w.r.t. her/his bid - Myerson's Lemma Implementable ⇔ Monotone In the above case, the DSIC payment rule is unique. #### 3. von Neumann‘s Minimax Theorem. 🎉 (800+ lines, pending for modification to Mathlib Standard) - Equilibrium in zero sum game - Formalization strategy: via Loomis’s theorem. #### 4. Nash Equilibrium. 🎉 (pending for modification to Mathlib Standard) #### 5. Brouwer fixed-point theorem. (Work in Progress) #### 6. More Mechanism design. (Planning) new-contributor t-logic merge-conflict awaiting-author 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
324-73485
10 months ago
unknown
unknown
19125 yhtq
author:yhtq
feat: add theorems to transfer `IsGalois` between pairs of fraction rings feat: add theorems to transfer `IsGalois` between pairs of fraction rings. - [x] depends on: #18404 - [x] depends on: #19124 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra merge-conflict
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
295-9502
9 months ago
301-44925
9 months ago
0-4534
1 hour
17739 Aaron1011
author:Aaron1011
feat(Topology/Order/DenselyOrdered): prove Not (IsOpen) for intervals Prove that Iic/Ici/Ioc/Ico/Icc intervals are not open in densely ordered topologies with no min/max element --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology merge-conflict awaiting-author 27/0 Mathlib/Topology/Order/DenselyOrdered.lean 1 8 ['github-actions', 'vihdzp'] nobody
261-31514
8 months ago
261-31514
8 months 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 new-contributor t-combinatorics merge-conflict awaiting-author 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
260-50600
8 months ago
260-50600
8 months ago
9-13962
9 days
18629 tomaz1502
author:tomaz1502
feat(Computability.Timed): Formalization of runtime complexity of List.merge This PR adds the formalization of the runtime complexity of the merge function, defined in `Data/List/Sort`. Requires: https://github.com/leanprover-community/mathlib4/pull/15450 References: - Previous PR on mathlib3: https://github.com/leanprover-community/mathlib3/pull/14494/ - First discussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/BSc.20Final.20Project/near/220647062 - Second disussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Formalization.20of.20Runtime.20Complexity.20of.20Sorting.20Algorithms/near/284184450 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor merge-conflict awaiting-author 186/0 Mathlib.lean,Mathlib/Computability/Timed/InsertionSort.lean,Mathlib/Computability/Timed/Merge.lean 3 2 ['github-actions', 'trivial1711'] nobody
260-16519
8 months ago
260-16519
8 months ago
33-11262
33 days
19291 PieterCuijpers
author:PieterCuijpers
feat(Algebra/Order/Hom): add quantale homomorphism Definition of quantale homomorphisms as functions that are both semigroup homomorphisms and complete lattice homomorphisms. --- - [x] depends on: #19810 - [x] depends on: #19811 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra merge-conflict awaiting-author
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
255-38178
8 months ago
255-38179
8 months ago
36-2255
36 days
20372 jvlmdr
author:jvlmdr
feat(MeasureTheory/Function): Add ContinuousLinearMap.bilinearCompLp(L) Introduce ContinuousLinearMap.bilinearCompLp and bilinearCompLpL. Generalize eLpNorm_le_eLpNorm_mul_eLpNorm theorems to include constant C in bound condition. --- Expect this may be useful for defining tempered distributions from functions in `L^p`. The definitions more or less follow `ContinuousLinearMap.compLp...`. Names are loosely analogous to `ContinuousLinearMap.bilinearComp` and `SchwartzMap.bilinLeftCLM`. Note: I preferred the spelling `hpqr : p⁻¹ + q⁻¹ = r⁻¹` with `f` in `L^p` and `g` in `L^q` to `hpqr : 1 / p = 1 / q + 1 / r`. It's easier to obtain from `ENNReal.IsConjExponent` too. A few questions: - [ ] I defined `bilinear{Left,Right}LpL` in addition to `bilinearCompLpL` because `LinearMap.mkContinuous₂` is marked as `noncomputable` and `LinearMap.mkContinuous` is not. Is this worth the extra definitions? (Note: This is not visible in the source due to `noncomputable section`.) - [ ] Should I use `C : ℝ` instead of `C : NNReal` for `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'`? - [ ] Is it going to be painful to have `[Fact (1 ≤ p)] [Fact (1 ≤ q)] [Fact (1 ≤ r)]`? I don't think there's a way to avoid it though. Maybe providing specialized versions for `p.IsConjExponent q` with `L^1`? Naming: - [ ] Is it satisfactory to add a `'` to the `eLpNorm_le_eLpNorm_mul_eLpNorm ` definitions in `CompareExp.lean` where `≤ ‖f x‖ * ‖g x‖` has been replaced with `≤ C * ‖f x‖ * ‖g x‖`? These could replace the existing theorems, although I don't want to break backwards compatibility. There are 5 instances: `eLpNorm_le_eLpNorm_top_mul_eLpNorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm_top'`, `eLpNorm'_le_eLpNorm'_mul_eLpNorm''`, `eLpNorm_le_eLpNorm_mul_eLpNorm_of_nnnorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'` (I'm not sure why the existing theorem `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm` has an internal `'`) - [ ] Is `bilinearLeftLpL` a suitable name? Other options: `bilinearCompLpLeftL`, `bilinearCompLeftLpL`, `bilinLeftLpL` (analogous to `SchwartzMap.bilinLeftCLM`) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability merge-conflict 203/40 Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSpace.lean 2 1 ['github-actions'] nobody
248-55526
8 months ago
248-55526
8 months ago
27-43617
27 days
17176 arulandu
author:arulandu
feat: integrals and integrability with .re Lemmas for swapping order of .re and integration/integrability. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability merge-conflict awaiting-author 49/0 Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean 4 30 ['EtienneC30', 'arulandu', 'github-actions', 'loefflerd'] nobody
247-29959
8 months ago
247-29959
8 months ago
9-73631
9 days
19943 AlexLoitzl
author:AlexLoitzl
feat(Computability): Add Chomsky Normal Form Grammar and translation - Define Chomsky normal form grammars - Add language-preserving translation between context-free grammars and Chomsky normal form grammars Co-authored-by: Martin Dvorak martin.dvorak@matfyz.cz --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor merge-conflict awaiting-author 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
231-46935
7 months ago
231-46935
7 months ago
37-29014
37 days
21269 CharredLee
author:CharredLee
(WIP) feat (CategoryTheory/Topos): Add topos theory content This code contains basic definitions and results in topos theory, including the definition of a subobject classifier, power objects, and topoi. It is proved that every topos has exponential objects, i.e. "internal homs". The mathematical content follows chapter IV sections 1-2 of Mac Lane and Moerdijk's text "Sheaves in Geometry and Logic". --- - [x] depends on: #21281 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory merge-conflict awaiting-author WIP 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 ['CharredLee', 'gio256', 'github-actions', 'joelriou', 'mathlib4-dependent-issues-bot'] nobody
221-13207
7 months ago
221-13207
7 months ago
0-13879
3 hours
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) ``` new-contributor t-algebra t-category-theory merge-conflict
label:t-algebra$
47/8 Mathlib/RepresentationTheory/FDRep.lean 1 19 ['github-actions', 'grhkm21', 'joelriou', 'kim-em', 'mathlib-bors'] nobody
217-55533
7 months ago
217-55533
7 months ago
125-12755
125 days
18626 hannahfechtner
author:hannahfechtner
feat : define Artin braid groups Define the Artin braid group on infinitely many strands. Includes a toGroup function which defines a function out of the braid group to any other group (given a function which satisfies the braid relations) (more to come in this file; next up: Artin braid groups on finitely many strands) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra merge-conflict awaiting-author
label:t-algebra$
91/0 Mathlib.lean,Mathlib/GroupTheory/SpecificGroups/BraidGroup/Basic.lean 2 22 ['github-actions', 'hannahfechtner', 'jcommelin', 'joelriou'] nobody
216-39844
7 months ago
216-39844
7 months ago
15-40648
15 days
21959 BGuillemet
author:BGuillemet
feat(Topology/ContinuousMap): Stone-Weierstrass theorem for MvPolynomial Add the subalgebra of multivariate polynomials and prove it separates points, on the same model as `ContinuousMap/Polynomial.lean`. Prove the Stone-Weierstrass theorem and some variations for multivariate polynomials. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology merge-conflict 285/1 Mathlib.lean,Mathlib/Topology/ContinuousMap/MvPolynomial.lean,Mathlib/Topology/ContinuousMap/StoneWeierstrass.lean 3 1 ['github-actions'] nobody
212-41547
6 months ago
212-41547
6 months ago
16-76141
16 days
15578 znssong
author:znssong
feat(Function): Fixed points of function `f` with `f(x) >= x` We added some lemmas of fixed points of function `f` with `f(x) >= x`, where `f : α → α` is a function on a finite type `α`. This will be needed in proof of Bondy-Chvátal theorem. --- See also branch `meow-sister/BondyChvatal`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis merge-conflict awaiting-author 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
204-37373
6 months ago
204-37373
6 months ago
29-48368
29 days
21018 markimunro
author:markimunro
feat(Data/Matrix): add file with key definitions and theorems about elementary row operations Prove that each elementary row operation is equivalent to a multiplication by an elementary matrix, has another row operation which inverts it, and that each elementary matrix has a left inverse. This is a very large PR and I understand it will take time. This is my first one and will likely have issues but I will be ready to answer questions/fix them as soon as possible. Co-authored-by: Christopher Lynch --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor merge-conflict awaiting-author enhancement 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 n/a ['chrisflav', 'eric-wieser', 'github-actions', 'j-loreaux', 'markimunro'] nobody
185-72772
6 months ago
unknown
unknown
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 new-contributor t-measure-probability t-analysis merge-conflict awaiting-author 60/1 Mathlib/MeasureTheory/Integral/FundThmCalculus.lean 1 3 ['github-actions', 'hrmacbeth', 'victorliu5296'] nobody
180-67761
5 months ago
180-67761
5 months ago
51-85104
51 days
22701 ctchou
author:ctchou
feat(Combinatorics): the Katona circle method This file formalizes the Katona circle method. From PlainCombi (LeanCamCombi): https://github.com/YaelDillies/LeanCamCombi/blob/master/LeanCamCombi/PlainCombi/KatonaCircle.lean Co-authored-by: Yaël Dillies new-contributor t-combinatorics merge-conflict 121/0 Mathlib.lean,Mathlib/Combinatorics/KatonaCircle.lean 2 1 ['github-actions'] nobody
180-17316
5 months ago
180-17316
5 months ago
30-8337
30 days
21488 imbrem
author:imbrem
feat(CategoryTheory/Monoidal): premonoidal categories Add support for premonoidal categories --- Still want to add support for: - Premonoidal braided/symmetric categories - The monoidal coherence theorem, which I've already ported in my `discretion` library - The `coherence` tactic, which should work fine for premonoidal categories too but wanted to get this in front of reviewers ASAP to make sure my general approach was alright [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory merge-conflict 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
177-49949
5 months ago
177-49950
5 months ago
58-20339
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. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology merge-conflict awaiting-author 281/1 Mathlib.lean,Mathlib/Topology/Covering/Basic.lean,Mathlib/Topology/Covering/Lift.lean 3 9 ['alreadydone', 'github-actions', 'grunweg', 'vbeffara'] nobody
176-52677
5 months ago
176-52677
5 months ago
55-53553
55 days
20313 thefundamentaltheor3m
author:thefundamentaltheor3m
feat(Data/Complex/Exponential): prove some useful results about the complex exponential. This PR proves two basic results about the complex exponential: * `abs_exp_mul_I (x : ℂ) : abs (Complex.exp (I * x)) = Real.exp (-x.im)` * `one_sub_rexp_re_le_abs_one_sub_cexp (x : ℂ) : 1 - Real.exp x.re ≤ Complex.abs (1 - Complex.exp x)` Both results were proved as part of the sphere packing project. There's a chance they're too specific for mathlib, but I thought they were worth PRing anyway. Would it also be a good idea to tag `abs_exp_mul_I` with `simp`? Feedback/suggestions welcome. Note: `one_sub_rexp_re_le_abs_one_sub_cexp` was proved by Bhavik Mehta @b-mehta --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis merge-conflict 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
169-23875
5 months ago
169-23875
5 months ago
25-60481
25 days
20730 kuotsanhsu
author:kuotsanhsu
feat(LinearAlgebra/Matrix/SchurTriangulation): prove Schur decomposition/triangulation `Matrix.schur_triangulation` shows that a matrix over an algebraically closed field is unitarily similar to an upper triangular matrix --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra merge-conflict awaiting-author
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
169-20007
5 months ago
169-20007
5 months ago
13-60072
13 days
13685 niklasmohrin
author:niklasmohrin
feat(Combinatorics): add definitions for network flows Although we might not have any super-interesting results ready for mathlib yet, I feel that the definitions from this commit are already mature enough to include. These definitions are ported from last semester's work we did at https://github.com/niklasmohrin/lean-seminar-2023 and I have put some time in to refactor our code to `Int` and now to any parameter `R`. In the linked repository, there is some more stuff that I can send in. One obstacle without integer values is that it is not clear why a maximum flow would exist. I think the best way to tackle this would be to prove max-flow-min-cut theorem and implement the Ford-Fulkerson algorithm. It has been pointed out on Zulip that there is an [Isabelle formalization of the Edmonds Karp Algorithm](https://www.isa-afp.org/entries/EdmondsKarp_Maxflow.html). I feel that the definitions are pretty solid and it makes sense to include them, even if just for unifying definitions across downstream projects. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics merge-conflict awaiting-author 244/0 Mathlib.lean,Mathlib/Combinatorics/Flow/Basic.lean,docs/references.bib 3 57 ['Shreyas4991', 'YaelDillies', 'b-mehta', 'github-actions', 'leanprover-community-bot-assistant', 'madvorak', 'niklasmohrin'] nobody
142-9323
4 months ago
142-9325
4 months ago
86-21072
86 days
15651 TpmKranz
author:TpmKranz
feat(Computability/NFA): operations for Thompson's construction Lays the groundwork for a proof of equivalence of RE and NFA, w.r.t. described language. Actual connection to REs comes later, after the groundwork for the opposite direction has been laid. Third chunk of #12648 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-computability new-contributor merge-conflict awaiting-author 307/5 Mathlib/Computability/NFA.lean 1 15 ['TpmKranz', 'YaelDillies', 'dupuisf', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte'] nobody
137-39731
4 months ago
137-39732
4 months ago
45-84611
45 days
22361 rudynicolop
author:rudynicolop
feat(Computability/NFA): nfa closure properties Add the closure properties union, intersection and reversal for NFA. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-computability new-contributor merge-conflict awaiting-author 218/2 Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean 2 90 ['EtienneC30', 'b-mehta', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] EtienneC30
assignee:EtienneC30
137-38805
4 months ago
137-38807
4 months ago
39-67601
39 days
23349 BGuillemet
author:BGuillemet
feat: add LocallyLipschitzOn.lipschitzOnWith_of_isCompact and two small lemmas about Lipschitz functions Main feat (in Mathlib/Topology/EMetricSpace/Basic.lean): if a function `f` from an extended pseudometric space to a pseudometric space is locally Lipschitz on a compact subset `s`, then `f` is Lipschitz on `s`. The theorem is true only when the codomain of `f` is a pseudometric space, so it needs imports from Mathlib/Topology/MetricSpace. Other small feat (in Mathlib/Analysis/Calculus/ContDiff/RCLike.lean): a function that is continuously differentiable on an open subset is locally Lipschitz on this subset. --- - [ ] depends on: #22890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-topology merge-conflict 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
129-35045
4 months ago
129-35047
4 months ago
35-30364
35 days
12799 jstoobysmith
author:jstoobysmith
feat(LinearAlgebra/UnitaryGroup): Add properties of Special Unitary Group Add properties of the special unitary group, mirroring the properties of found in Algebra/Star/Unitary.lean. In particular, I add an instance of `specialUnitaryGroup` as a `Group`, `Star`, `InvolutiveStar`, and `StarMul`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra merge-conflict please-adopt awaiting-author
label:t-algebra$
78/0 Mathlib/LinearAlgebra/UnitaryGroup.lean 1 8 ['chrisflav', 'jcommelin', 'leanprover-community-bot-assistant'] nobody
119-6998
3 months ago
119-7000
3 months ago
9-22007
9 days
20334 miguelmarco
author:miguelmarco
feat: allow polyrith to use a local Singular/Sage install Try to call a local install of Singular (either standalone or inside Sage) to find the witness for polyrith before trying to call the online sage cell server. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-meta merge-conflict awaiting-author 171/48 Mathlib/Tactic/Polyrith.lean,scripts/polyrith_sage.py 2 16 ['eric-wieser', 'github-actions', 'hanwenzhu', 'kim-em', 'miguelmarco', 'mkoeppe'] nobody
111-85951
3 months ago
231-63913
7 months ago
27-65384
27 days
19796 peakpoint
author:peakpoint
feat: L'Hopital's rule from within a convex set --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis merge-conflict 190/19 Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Analysis/Calculus/LHopital.lean,Mathlib/Analysis/Convex/Topology.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Order/Interval/Set/Basic.lean 5 15 ['RemyDegenne', 'github-actions', 'leanprover-community-bot-assistant', 'peakpoint', 'sgouezel'] sgouezel
assignee:sgouezel
90-83749
2 months ago
90-83749
2 months ago
80-57750
80 days
23637 kirilvino
author:kirilvino
feat(Combinatorics/SimpleGraph): every circuit contains a cycle proof circuit to cycle proof --- This PR uses the bypass definition in a new function for closed walks that removes repeated vertices. Then proves if the closed walk given is a circuit, that the result from this function is a cycle. This is then packaged up similar to the existing ToPath definition, creating a way of transforming a circuit into a cycle. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics merge-conflict awaiting-author 26/0 Mathlib/Combinatorics/SimpleGraph/Path.lean 1 9 ['b-mehta', 'github-actions', 'kirilvino', 'leanprover-community-bot-assistant'] nobody
90-83360
2 months ago
90-83361
2 months ago
13-19789
13 days
25218 kckennylau
author:kckennylau
feat(AlgebraicGeometry): Tate normal form of elliptic curves --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip new-contributor t-algebraic-geometry merge-conflict 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
90-82712
2 months ago
90-82713
2 months ago
6-51040
6 days
25283 Brian-Nugent
author:Brian-Nugent
feat: regular local rings Adds regular local rings and proves they are integral domains. --- - [ ] depends on: #25280 - [ ] depends on: #25282 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra merge-conflict
label:t-algebra$
871/0 .vscode/settings.json,Mathlib.lean,Mathlib/RingTheory/EmbeddingDimension.lean,Mathlib/RingTheory/LocalRingDimension.lean,Mathlib/RingTheory/RegularLocalRing.lean 5 6 ['Brian-Nugent', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'yuanyi-350'] nobody
90-82708
2 months ago
90-82708
2 months ago
11-84822
11 days
23990 robertmaxton42
author:robertmaxton42
feat (Types.Colimits): Quot is functorial and colimitEquivQuot is natural Add `Functor.quotFunctor` to parallel `Functor.sectionsFunctor`, witnessing that `Quot` is functorial; add `colimNatIsoQuotFunctor` to parallel `limNatIsoSectionsFunctor`, witnessing that `colimitEquivQuot` is natural in the diagram $F$. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory merge-conflict awaiting-author 33/0 Mathlib/CategoryTheory/Limits/Types/Colimits.lean 1 5 ['github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'robertmaxton42'] nobody
87-4124
2 months ago
87-4125
2 months ago
8-28043
8 days
10541 Louddy
author:Louddy
feat(Algebra/SkewMonoidAlgebra/Basic): add SkewMonoidAlgebra # Skew Monoid algebras This file presents a skewed version of `Mathlib.Algebra.MonoidAlgebra.Basic`. ## Definition We define `SkewMonoidAlgebra k G := G →₀ k` attached with a skewed convolution product. Here, the product of two elements `f g : SkewMonoidAlgebra k G` is the finitely supported function whose value at `a` is the sum of `f x * (x • g y)` over all pairs `x, y` such that `x * y = a`. This will be used in a later PR to define skew polynomial rings. Co-authored-by: María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)> --- - [x] depends on: #15878 - [x] depends on: #19084 - [x] depends on: #22078 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra merge-conflict WIP
label:t-algebra$
1624/0 Mathlib.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/Algebra/SkewMonoidAlgebra/Lift.lean 4 105 ['AntoineChambert-Loir', 'Louddy', 'YaelDillies', 'eric-wieser', 'fpvandoorn', 'github-actions', 'mariainesdff', 'mathlib4-dependent-issues-bot', 'mattrobball'] AntoineChambert-Loir
assignee:AntoineChambert-Loir
86-51790
2 months ago
86-51792
2 months ago
179-12934
179 days
20029 FrederickPu
author:FrederickPu
Allow for Config attributes to be set directly Allow for Config attributes to be set directly when using initialize_simp_projection as per issue #19895 Basically modified initialize_simp_projection so that the user has the option of specifying a tuple of config option values. Ex: ``` initialize_simp_projection MulEquiv (toFun → apply, invFun → symm_apply) (fullyApplied := false) ``` These config options are then converted into projections.  --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-meta merge-conflict WIP 34/4 Mathlib/Tactic/Simps/Basic.lean 1 11 ['FrederickPu', 'YaelDillies', 'fpvandoorn', 'github-actions', 'leanprover-community-bot-assistant'] nobody
70-23737
2 months ago
70-23738
2 months ago
0-34081
9 hours
11021 jstoobysmith
author:jstoobysmith
feat(AlgebraicTopology) : add join of augmented SSets This pull-request adds the definition of the join of augmented SSets defined as contravariant functors from `WithInitial SimplexCategory` to `Type u`. In addition it shows that the join of two standard augmented SSets is again an augmented SSets. From this the definition of the join of simplicial sets should follow easily. To aid the above theory, an api for `WithInitial SimplexCategory` has been created, with the notion of the `join` and `split` (forming a sort of inverse to join) of objects in this category are defined. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology new-contributor merge-conflict WIP 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
64-54896
2 months ago
64-54896
2 months ago
1-20125
1 day
10190 jstoobysmith
author:jstoobysmith
feat(AlgebraicTopology): add Augmented Simplex Category - Added the definition of the category FinLinOrd of finite linear ordered sets. - Added the definition of the augmented simplex category `AugmentedSimplexCategory`, and showed it is the Skeleton of FinLinOrd. - Showed that the category of augmented simplicial objects defined as a comma category is equivalent to the category of functors from `AugmentedSimplexCategory^\op` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology new-contributor t-category-theory merge-conflict WIP 720/0 Mathlib.lean,Mathlib/AlgebraicTopology/AugmentedSimplexCategory.lean,Mathlib/AlgebraicTopology/SimplicialObject.lean,Mathlib/Order/Category/FinLinOrd.lean 4 5 ['TwoFX', 'YaelDillies', 'joelriou', 'jstoobysmith'] nobody
64-54852
2 months ago
64-54852
2 months ago
7-63215
7 days
9935 jstoobysmith
author:jstoobysmith
feat(AlgebraicTopology): add constructors for horns Added a function that given a simplicial set S and a set of n-1 simplexes satisfying certain conditions, creates a morphism in SSet from a n horn to a simplicial set S. Included also are a series of lemmas and definitions used in this construction. In particular I define a function that takes a m-simplex in a horn, and returns the smallest 'index' of face it factors through, and give a series of lemmas related to this. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology new-contributor merge-conflict awaiting-author 462/2 Mathlib/AlgebraicTopology/SimplicialSet.lean 1 15 ['YaelDillies', 'jcommelin', 'jstoobysmith', 'kim-em', 'linesthatinterlace'] nobody
64-54253
2 months ago
64-54253
2 months ago
14-58814
14 days
25485 VTrelat
author:VTrelat
feat(SetTheory/ZFC/Naturals): define natural numbers in ZFC Extend the model of ZFC with naturals: - define a set `Nat` of naturals following the usual construction (∅, {∅}, {∅, {∅}}, ...) - define a proper type `ZFNat` representing naturals - add theorems on usual algebraic properties of naturals - provide a recursor and induction schemes to define/prove by induction --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depend on: #25483 t-set-theory new-contributor merge-conflict 2095/0 Mathlib/Data/Set/Prod.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Booleans.lean,Mathlib/SetTheory/ZFC/Naturals.lean 4 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
60-61073
1 month ago
60-61073
1 month ago
29-51653
29 days
25238 Hagb
author:Hagb
feat(Tactic/ComputeDegree): add support for scalar multiplication with different types It would be able to deal with `a • (X : R[X])` where `a : S` is in a different type `S` with `[SMulZeroClass S R]`. --- - [x] depends on: #25237 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-meta merge-conflict 17/5 Mathlib/Tactic/ComputeDegree.lean,MathlibTest/ComputeDegree.lean 2 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
60-61043
1 month ago
60-61043
1 month ago
38-26044
38 days
18646 jxjwan
author:jxjwan
feat(RingTheory): isotypic components --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor merge-conflict 308/0 Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/RingTheory/Isotypic.lean,Mathlib/RingTheory/SimpleModule.lean 3 1 ['github-actions'] nobody
59-63064
1 month ago
59-63064
1 month ago
20-16585
20 days
27378 peakpoint
author:peakpoint
refactor(Geometry/Euclidean/Projection): redefine projection and reflection for affine subspaces This PR continues the work from #25578. Original PR: https://github.com/leanprover-community/mathlib4/pull/25578 new-contributor t-euclidean-geometry merge-conflict 316/317 Mathlib/Analysis/Normed/Affine/ContinuousAffineMap.lean,Mathlib/Analysis/Normed/Affine/Isometry.lean,Mathlib/Geometry/Euclidean/Circumcenter.lean,Mathlib/Geometry/Euclidean/Projection.lean 4 7 ['github-actions', 'jsm28', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot', 'peakpoint'] nobody
56-37206
1 month ago
56-37207
1 month ago
15-31164
15 days
20671 thefundamentaltheor3m
author:thefundamentaltheor3m
feat(Analysis/Asymptotics/SpecificAsymptotics): Proving that 𝛔ₖ(n) = O(nᵏ⁺¹) This PR proves a result about the $\sigma_k(n)$ arithmetic function, namely, that it is $O\left(n^{k+1}\right)$. Main theorem: `theorem sigma_asymptotic (k : ℕ) : (fun n ↦ (σ k n : ℝ)) =O[atTop] (fun n ↦ (n ^ (k + 1) : ℝ))` This result was proved as part of the sphere packing project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-number-theory merge-conflict awaiting-author 29/0 Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean 1 3 ['b-mehta', 'github-actions', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
54-66605
1 month ago
54-66605
1 month ago
9-59130
9 days
25483 VTrelat
author:VTrelat
chore(Data/Set/Prod, SetTheory/ZFC/Basic): add theorem prod_subset_of_prod and extend ZFC model Required by @eric-wieser in #24281 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor merge-conflict 103/0 Mathlib/Data/Set/Prod.lean,Mathlib/SetTheory/ZFC/Basic.lean 2 10 ['Ruben-VandeVelde', 'VTrelat', 'github-actions', 'leanprover-community-bot-assistant'] nobody
51-48395
1 month ago
90-82702
2 months ago
29-56208
29 days
27953 CoolRmal
author:CoolRmal
feat(ProbabilityTheory): Conditional Jensen's Inequality This PR adds conditional Jensen's inequality. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability merge-conflict 526/14 Mathlib.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Separation.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Basic.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondJensen.lean,Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean 5 3 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
50-22791
1 month ago
50-22792
1 month ago
8-36460
8 days
8102 miguelmarco
author:miguelmarco
feat(Tactic): add `unify_denoms` and `collect_signs` tactics This PR adds four new tactics: - `unify_denoms` tries to put expressions with several divisions in a form with only one division. In the case of fields, it works similarly to `field_simp`, but if the hypothesis about denominators being nonzero are not present, it assumes them, and leaves them as new goals to prove. In that sense, it is an "unsafe" tactic (but can be useful nevertheless, for example when you can't find which exact hypothesis is missing). It also works with expressions of naturals and Euclidean domains, assuming the corresponding hypothesis about the denominators dividing the numerators. - `unify_denoms!` extends `unify_denoms` to work with (in)equalities, assuming also that the denominators, once in normal form, are positive. - `collect_signs` works similarly with expressions using sums and substractions: it tries to put them in a form of one sum minus other sum. In the case of working with naturals, it assumes that we never substract a bigger number from a smaller one. Both are implemented essentially as a macro that combines several rewriting rules. Some new lemmas with the corresponding rules are added. --- new-contributor t-meta merge-conflict please-adopt modifies-tactic-syntax good first issue 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
49-63863
1 month ago
49-73619
1 month ago
22-16933
22 days
28150 Equilibris
author:Equilibris
chore: clean up proofs typevec proofs While adding variable universe corecs I found a lot of theorems in typevec that could do with a bit of a clean-up --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor merge-conflict 24/26 Mathlib/Data/TypeVec.lean 1 7 ['Equilibris', 'alexkeizer', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
42-13470
1 month ago
42-13471
1 month ago
13-49738
13 days
27403 MoritzBeroRoos
author:MoritzBeroRoos
fix: replace probably erroneous usage of ⬝ (with old \cdot) by · (with \centerdot) Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot). Currently the abbreviations \cdot and \centerdot resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for center..). This pr replaces instances of ⬝ where · was probably meant. All of the replacement is in comments, except for the file bench_summary.lean which is used for priting the github benchmark results. Since this file is about scientific notation of numbers, sure · was meant to be used, not a rectangle. [Related](https://github.com/leanprover-community/mathlib4/pull/27399) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict 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
41-79190
1 month ago
64-55112
2 months ago
7-54661
7 days
27399 MoritzBeroRoos
author:MoritzBeroRoos
chore: replace every usage of ⬝ᵥ (with old \cdot) by ·ᵥ (with \centerdot) Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot). Currently the abbreviations `\cdot` and `\centerdot` resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for `center`..): - `\cdot` gives ⬝ [U+2B1D](https://www.compart.com/en/unicode/U+2B1D) "Black Very Small Square" - `\centerdot` gives · [U+00B7](https://www.compart.com/en/unicode/U+00B7) "Middle Dot" Mathlib mostly uses the `\centerdot` variant, except for the dotProduct notation and some probably unsuspecting people wanting \centerdot but getting \cdot in their comments and 6 uses of a notation using the raw `\cdot` without any subscript at `Mathlib\Topology\Homotopy\Product.lean`. This PR replaces the dot product `⬝ᵥ` with its `\centerdot` counterpart `·ᵥ`. The related PR [here](https://github.com/leanprover/vscode-lean4/pull/639) can then overwrite the `\cdot` abbreviation, to produce the same symbol as the `centerdot` abbreviation does. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict 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
41-41022
1 month ago
64-55113
2 months ago
7-62439
7 days
28708 sjh227
author:sjh227
feat (Data) : edit DoublyStochastic, add Stochastic to matrix edit DoublyStochastic add Stochastic --- Add the file Stochastic to matrix. Edit DoublyStochastic so that it depends on Stochastic along with a new lemma t-data new-contributor merge-conflict 249/1 Mathlib.lean,Mathlib/Data/Matrix/DoublyStochastic.lean,Mathlib/Data/Matrix/Stochastic.lean 3 26 ['github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot', 'sjh227'] nobody
37-31734
1 month ago
37-31734
1 month ago
0-78027
21 hours
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 --- new-contributor t-logic merge-conflict 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
24-47053
24 days ago
24-47054
24 days ago
21-3001
21 days
29574 JarodUW
author:JarodUW
Regular local rings are domains We have added three new files in Mathlib/RingTheory/LocalRing * EmbeddingDimension.lean * LocalRingDimension.lean * RegularLocalRings.lean We have added two lemmas and an instance in Mathlib/RingTheory/LocalRing/RingHom/Basic.lean This work was done by Jarod Alper and Brian Nugent. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor merge-conflict 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
18-85402
18 days ago
18-85403
18 days ago
3-7974
3 days
14242 js2357
author:js2357
feat: Prove equivalence of `isDedekindDomain` and `isDedekindDomainDvr` Prove that `isDedekindDomainDvr` is equivalent to both `isDedekindDomain` and `isDedekindDomainInv`. Specifically, prove `isDedekindDomainDvr A → isDedekindDomainInv A`, because `isDedekindDomain A → isDedekindDomainDvr A` and `IsDedekindDomain A ↔ IsDedekindDomainInv A` are already in Mathlib. - [x] depends on: #14099 - [x] depends on: #14216 - [ ] depends on: #14237 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
269/1 Mathlib.lean,Mathlib/RingTheory/DedekindDomain/Dvr.lean,Mathlib/RingTheory/FractionalIdeal/LocalizedAtPrime.lean,Mathlib/RingTheory/Localization/Basic.lean 4 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
374-31621
1 year ago
374-31621
1 year ago
0-0
0 seconds
16888 metinersin
author:metinersin
feat(ModelTheory/Complexity): Define conjunctive and disjunctive normal forms Define `FirstOrder.Language.BoundedFormula.IsDNF` and `FirstOrder.Language.BoundedFormula.IsCNF`. --- - [ ] depends on: #16887 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-logic merge-conflict blocked-by-other-PR 415/7 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
366-27599
1 year ago
366-27599
1 year ago
0-1045
17 minutes
16887 metinersin
author:metinersin
feat(ModelTheory/Complexity): define conjunctive and disjunctive formulas Defines `FirstOrder.Language.BoundedFormula.IsConjunctive` and `FirstOrder.Language.BoundedFormula.IsDisjunctive`. --- - [ ] depends on: #16885 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-logic merge-conflict blocked-by-other-PR 300/7 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
366-27599
1 year ago
366-27600
1 year ago
0-1299
21 minutes
16889 metinersin
author:metinersin
feat(ModelTheory/Complexity): Normal forms Defines `FirstOrder.Language.BoundedFormula.toDNF` and `FirstOrder.Language.BoundedFormula.toCNF` - given a quantifier-free formula, these construct a semantically equivalent formula in disjunctive normal form and conjunctive normal form, respectively. --- - [ ] depends on: #16888 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-logic merge-conflict blocked-by-other-PR 525/7 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
366-27598
1 year ago
366-27598
1 year 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`. - [ ] depends on: #12751 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor merge-conflict awaiting-author blocked-by-other-PR 226/0 Mathlib.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/GrayCode.lean,Mathlib/Data/Nat/Size.lean 5 5 ['Rida-Hamadani', 'alreadydone', 'github-actions', 'grunweg', 'leanprover-community-mathlib4-bot'] nobody
348-50256
11 months ago
348-50256
11 months ago
6-8380
6 days
11156 smorel394
author:smorel394
feat(LinearAlgebra/{TensorProductBasis,Dual}): basis and dual of `PiTensorProduct` Construct a basis of a `PiTensorProduct` of modules given bases of the modules, and relationship between the dual of a `PiTensorProduct` and the `PiTensorProduct` of the duals. Main results: * `Basis.piTensorProduct` (in `LinearAlgebra/TensorProductBasis.lean`): Let `ι` be a `Fintype` and `M` be a family of modules indexed by `ι`. If `b i : κ i → M i` is a basis for every `i` in `ι`, then `fun (p : Π i, κ i) ↦ ⨂ₜ[R] i, b i (p i)` is a basis of `⨂[R] i, M i`. * `PiTensorProduct.dualDistrib` (in `LinearAlgebra/Dual.lean`): The canonical linear map from `⨂[R] i, Dual R (M i)` to `Dual R (⨂[R] i, M i)`, sending `⨂ₜ[R] i, f i` to the composition of `PiTensorProduct.map f` with the linear equivalence `⨂[R] i, R →ₗ R` given by multiplication. * `PiTensorProduct.dualDistribEquiv` (also in `LinearAlgebra/Dual.lean`): A linear equivalence between `⨂[R] i, Dual R (M i)` and `Dual R (⨂[R] i, M i)` when all `M i` are finite free modules. If `f : (i : ι) → Dual R (M i)`, then this equivalence sends `⨂ₜ[R] i, f i` to the composition of `PiTensorProduct.map f` with the natural isomorphism `⨂[R] i, R ≃ R` given by multiplication. - [ ] depends on: #11155 (currently used as the base branch; do not merge without switching it back to `master`!) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-algebra merge-conflict please-adopt blocked-by-other-PR
label:t-algebra$
166/2 Mathlib/LinearAlgebra/DirectSum/Finsupp.lean,Mathlib/LinearAlgebra/Dual.lean,Mathlib/LinearAlgebra/TensorProduct/Basis.lean 3 4 ['eric-wieser', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
277-48333
9 months ago
322-63961
10 months ago
0-0
0 seconds
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 new-contributor t-combinatorics merge-conflict blocked-by-other-PR 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', 'leanprover-community-mathlib4-bot'] YaelDillies
assignee:YaelDillies
260-50600
8 months ago
260-50600
8 months ago
0-1791
29 minutes
20248 peabrainiac
author:peabrainiac
feat(Topology/Compactness): first-countable locally path-connected spaces are delta-generated Shows that all first-countable locally path-connected spaces are delta-generated (so in particular all normed spaces and convex subsets thereof are), and that delta-generated spaces are equivalently generated by the unit interval or standard simplices. --- - [ ] depends on: #21616 In principle, this should be close to all that's required to show that all simplicial complexes and CW-complexes are delta-generated; I just haven't done it yet because I'm not sure which file to best do it in. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-topology merge-conflict awaiting-author blocked-by-other-PR 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
236-12836
7 months ago
236-12836
7 months ago
39-21495
39 days
14060 YnirPaz
author:YnirPaz
feat(SetTheory/Ordinal/Clubs): define club sets and prove basic properties Create a file where club sets are defined and their basic properties are proven. I also created a new recursion principle for ordinals, bounded recursion. --- - [ ] depends on: #19189 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-logic merge-conflict blocked-by-other-PR 315/3 Mathlib.lean,Mathlib/Order/SuccPred/Limit.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Club.lean,Mathlib/SetTheory/Ordinal/Topology.lean 6 93 ['YaelDillies', 'YnirPaz', 'alreadydone', 'dupuisf', 'github-actions', 'mathlib4-dependent-issues-bot', 'vihdzp', 'zeramorphic'] nobody
213-84357
6 months ago
213-84357
6 months ago
92-44198
92 days
15654 TpmKranz
author:TpmKranz
feat(Computability): language-preserving maps between NFA and RE Map REs to NFAs via Thompson's construction and NFAs to REs using GNFAs Last chunk of #12648 --- - [ ] depends on: #15651 - [ ] depends on: #15649 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-computability new-contributor merge-conflict blocked-by-other-PR 985/2 Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean,Mathlib/Computability/RegularExpressions.lean,Mathlib/Data/FinEnum/Option.lean,docs/references.bib 7 3 ['github-actions', 'leanprover-community-mathlib4-bot', 'meithecatte'] nobody
151-17125
4 months ago
151-17130
4 months ago
0-179
2 minutes
26168 oliver-butterley
author:oliver-butterley
feat(MeasureTheory.VectorMeasure) : variation defined as a supremum is equal to variation defined using the Hahn-Jordan decomposition. Add `signedMeasure_totalVariation_eq`: if `μ` is a `SignedMeasure` then variation defined as a supremum is equal to variation defined using the Hahn-Jordan decomposition. Co-authored-by: @yoh-tanimoto - [ ] depends on: #26165 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability blocked-by-other-PR 680/0 Mathlib.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Equiv.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Lemmas.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
90-64322
2 months ago
90-64851
2 months ago
15-65390
15 days
26165 oliver-butterley
author:oliver-butterley
feat(MeasureTheory.VectorMeasure): add lemma which shows that variation of a `ℝ≥0∞` VectorMeasure is equal to itself Add a lemma for the variation of a VectorMeasure which tells that if `μ` is `VectorMeasure X ℝ≥0∞` then `variation μ = μ`. Co-authored-by: @yoh-tanimoto - [ ] depends on: #26160 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability blocked-by-other-PR 467/0 Mathlib.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Lemmas.lean 3 1 ['github-actions'] nobody
90-64322
2 months ago
90-64878
2 months ago
15-66224
15 days
26160 oliver-butterley
author:oliver-butterley
feat(MeasureTheory.VectorMeasure): add several lemmas which characterize variation Add the following lemmas concerning variation of a VectorMeasure: * `norm_measure_le_variation`: `‖μ E‖ₑ ≤ variation μ E`. * `variation_neg`: `(-μ).variation = μ.variation`. * `variation_zero`: `(0 : VectorMeasure X V).variation = 0`. * `absolutelyContinuous` Co-authored-by: @yoh-tanimoto - [ ] depends on: #26156 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability blocked-by-other-PR 432/0 Mathlib.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Lemmas.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
90-64321
2 months ago
90-64930
2 months ago
15-68781
15 days
10006 jstoobysmith
author:jstoobysmith
feat(AlgebraicTopology): homotopy in quasicategories Defined a homotopy between two 1-simplicies in a quasicategories, and proved the property of being homotopic forms an equivalence relation. --- - [ ] depends on: #9935 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology new-contributor merge-conflict awaiting-author blocked-by-other-PR 898/1 Mathlib.lean,Mathlib/AlgebraicTopology/Homotopy.lean,Mathlib/AlgebraicTopology/SimplexCategory.lean,Mathlib/AlgebraicTopology/SimplicialSet.lean 4 3 ['joelriou', 'leanprover-community-mathlib4-bot'] nobody
64-54513
2 months ago
64-54513
2 months ago
0-0
0 seconds
25486 VTrelat
author:VTrelat
feat(SetTheory/ZFC/Integers): define integers in ZFC Extend the model of ZFC with integers following the converse direction as for naturals. We first define a type and then build a set. We finally show that both representations have coercions in both direction: - define a proper type `ZFInt` representing integers based on `ZFNat × ZFNat` and following the usual construction of integers - add theorems on usual algebraic properties of integers - define a set `Int` and show that it matches-i.e. that it is isomorphic to-the type `ZFInt` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #25483 - [ ] depends on: #25485 t-set-theory new-contributor merge-conflict blocked-by-other-PR 2003/0 Mathlib/Data/Set/Prod.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Booleans.lean,Mathlib/SetTheory/ZFC/Integers.lean 4 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
60-61077
1 month ago
60-61077
1 month ago
0-2067
34 minutes
25484 VTrelat
author:VTrelat
feat(SetTheory/ZFC/Booleans): define Boolean algebra in ZFC Extend the model of ZFC with Boolean algebra: - define a set 𝔹 of booleans - define a proper type `ZFBool` representing booleans - add theorems on usual algebraic properties of booleans - provide usual boolean notations like `⊤`, `⊥`, `∧`, `∨`, etc. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #25483 t-set-theory new-contributor merge-conflict blocked-by-other-PR 619/0 Mathlib/Data/Set/Prod.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Booleans.lean 3 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
60-61068
1 month ago
60-61068
1 month ago
0-1523
25 minutes
28152 Sebi-Kumar
author:Sebi-Kumar
feat(AlgebraicTopology): characterize simply connectedness in terms of loops Show that a space is simply connected if and only if all loops within that space are homotopic to the constant loop. To be used in a proof that the `n`-sphere is simply connected for `n > 1`. --- This code was written at the University of Western Ontario as a part of the Fields Undergraduate Summer Research Program under the supervision of Chris Kapulkin and Daniel Carranza. - [ ] depends on: #28126 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology new-contributor blocked-by-other-PR 37/5 Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
55-41214
1 month ago
55-41215
1 month ago
0-2854
47 minutes
28208 Sebi-Kumar
author:Sebi-Kumar
feat(Topology): add the definition `foldTrans` to concatenate finite sequences of paths Add `foldTrans`, which folds the function `Path.trans` across a sequence of paths with compatible endpoints, corresponding to the concatenation of a finite sequence of paths. This is implemented with `Fin.dfoldl` from the Batteries library. Prove basic properties about `foldTrans` (i.e., how it behaves with respect to `Path.refl`, `Path.subpath`, and homotopies). --- To provide additional context, I am new to contributing to Mathlib, and I am doing so as a part of the Fields Undergraduate Summer Research Program at the University of Western Ontario under the supervision of Chris Kapulkin and Daniel Carranza. My goal is to prove that the `n`-sphere is simply connected for `n > 1`, following the proof from Hatcher's "Algebraic Topology." - [ ] depends on: #27261 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology blocked-by-other-PR 259/0 Mathlib.lean,Mathlib/Topology/FoldTrans.lean,Mathlib/Topology/Subpath.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
54-10854
1 month ago
54-10855
1 month ago
0-2340
39 minutes
27645 bjornsolheim
author:bjornsolheim
feat(Geometry/Convex/Cone): add pointed cone tensor products Define the minimal and maximal tensor product of pointed cones. Prove that the minimal tensor product is less than or equal to the maximal tensor product. --- - [ ] depends on: #25292 - [ ] depends on: #27578 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry new-contributor blocked-by-other-PR 316/0 Mathlib.lean,Mathlib/Geometry/Convex/Cone/ConicalHull.lean,Mathlib/Geometry/Convex/Cone/TensorProduct.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
52-25397
1 month ago
52-29046
1 month ago
0-1828
30 minutes
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 new-contributor t-combinatorics blocked-by-other-PR 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 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
48-16658
1 month ago
48-23235
1 month ago
0-591
9 minutes
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 new-contributor t-logic merge-conflict awaiting-author blocked-by-other-PR 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
45-78101
1 month ago
45-78102
1 month ago
0-35689
9 hours
19582 yu-yama
author:yu-yama
feat(GroupExtension/Abelian): define `OfMulDistribMulAction.equivH2` Mainly defines: - `structure GroupExtension.OfMulDistribMulAction N G [MulDistribMulAction G N]`: group extensions of `G` by `N` where the multiplicative action of `G` on `N` is the conjugation - `structure GroupExtension.OfMulDistribMulActionWithSection N G [MulDistribMulAction G N]`: group extensions with specific choices of sections - `def GroupExtension.OfMulDistribMulAction.equivH2`: a bijection between the equivalence classes of group extensions and $H^2 (G, N)$ --- - [x] depends on: #20802 (split PR: contains changes to the `Defs` file) - [x] depends on: #20998 (split PR: mainly adds the `Basic` file) - [ ] depends on: #26670 (split PR: adds the first part of the `Abelian` file) Here is a relevant TODO in Mathlib: https://github.com/leanprover-community/mathlib4/blob/4e9fa40d7c480937e09cd6e47a591bd6f3b8be42/Mathlib/RepresentationTheory/GroupCohomology/LowDegree.lean#L46-L48 I would appreciate your comments. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra merge-conflict blocked-by-other-PR
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
43-28209
1 month ago
43-28210
1 month ago
43-26015
43 days
28246 Sebi-Kumar
author:Sebi-Kumar
feat(AlgebraicTopology/FundamentalGroupoid): the n-sphere is simply connected for n > 1 Prove that the `n`-dimensional sphere (i.e., the unit sphere centered at the origin in `(n + 1)`-dimensional real Euclidean space) is a simply connected space for `n > 1`. This proof follows Hatcher's "Algebraic Topology"; we first prove a general lemma about decomposing loops and then exploit the fact that non-surjective loops in the sphere are homotopically trivial. Note: To get this file to build, I edited `Mathlib/Tactic/Linter/DirectoryDependency.lean` to remove the restrictions on AlgebraicTopology files importing Geometry, NumberTheory, and SetTheory files. Thank you to those who shared their expertise [here](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Warning.20that.20AlgebraicTopology.20can't.20import.20SetTheory/with/533833638). As I understand it, this is just a short-term solution, so I would appreciate feedback on what to do about this situation. Note: I am unsure where exactly the file `SimplyConnectedSphere.lean` should go or whether that is an appropriate name for the file, so feedback there would be appreciated. --- To provide additional context, this code was written as a part of the Fields Undergraduate Summer Research Program at the University of Western Ontario under the supervision of Chris Kapulkin and Daniel Carranza. - [ ] depends on: #28208 - [ ] depends on: #28198 - [ ] depends on: #28185 - [ ] depends on: #28152 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology new-contributor blocked-by-other-PR 639/6 Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnectedSphere.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Topology/FoldTrans.lean,Mathlib/Topology/Path.lean,Mathlib/Topology/Subpath.lean 9 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
42-26817
1 month ago
53-24015
1 month ago
0-23
23 seconds
25488 VTrelat
author:VTrelat
feat(SetTheory/ZFC/Rationals): define rationals in ZFC Extend the model of ZFC with rationals: we define a proper type `ZFRat` representing integers based on pairs of `ZFInt` (enforcing the res to be nonzero) and following the usual construction of rationals. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #25483 - [ ] depends on: #25485 - [ ] depends on: #25486 t-set-theory new-contributor merge-conflict blocked-by-other-PR 2070/0 Mathlib/Data/Set/Prod.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Booleans.lean,Mathlib/SetTheory/ZFC/Integers.lean,Mathlib/SetTheory/ZFC/Rationals.lean 5 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
41-79227
1 month ago
41-79227
1 month ago
0-1808
30 minutes
27578 bjornsolheim
author:bjornsolheim
feat(Geometry/Convex/Cone): add conical combinations and conical hull - Prove closure properties of sequences with nonnegative coefficients - Define conical hull - Prove that the smallest pointed cone containing s is the conical hull of s - Implemented with Finsupp --- - [ ] depends on: #25292 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry new-contributor blocked-by-other-PR 188/0 Mathlib.lean,Mathlib/Geometry/Convex/Cone/ConicalHull.lean 2 8 ['YaelDillies', 'bjornsolheim', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
38-38382
1 month ago
52-34082
1 month ago
0-254
4 minutes
26413 michaellee94
author:michaellee94
feat(Analysis/ODE/MaximalSolution): Existence of maximal solutions for ODE meeting Picard-Lindelöf conditions Add existence proof for maximal solution of ODE using Picard-Lindelöf and a uniqueness theorem using Grönwall's lemma. --- - [x] depends on: #26382 - [ ] depends on: #29186 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis merge-conflict awaiting-author blocked-by-other-PR 746/1 Mathlib.lean,Mathlib/Analysis/ODE/MaximalSolution.lean,docs/undergrad.yaml 3 13 ['github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'winstonyin'] nobody
33-24612
1 month ago
33-24613
1 month ago
0-5139
1 hour
28126 Sebi-Kumar
author:Sebi-Kumar
feat(AlgebraicTopology/FundamentalGroupoid): relate equality in fundamental groupoid to homotopy Prove the theorem `fromPath_eq_iff_homotopic` which shows that two paths are equal in the fundamental groupoid if and only if they are homotopic. Also add simp lemmas `fromPath_refl`, `fromPath_symm`, and `fromPath_trans`. Together, these allow one to prove two paths are homotopic by transferring to the fundamental groupoid and using the `aesop_cat` tactic. --- I would like to thank Kenny Lau for inspiring this code on Zulip at [#Is there code for X? > Using aesop_cat to prove paths are homotopic](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Using.20aesop_cat.20to.20prove.20paths.20are.20homotopic). Also, I would like to note that I am a newcomer when it comes to contributing to Mathlib, and that this code was written as a part of a formalization project at the University of Western Ontario under the supervision of Chris Kapulkin and Daniel Carranza (which is happening through the Fields Undergraduate Summer Research Program). - [ ] depends on: #28234 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology new-contributor awaiting-author blocked-by-other-PR 121/141 Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean,Mathlib/CategoryTheory/Groupoid.lean,Mathlib/Topology/Covering.lean,Mathlib/Topology/Homotopy/HomotopyGroup.lean,Mathlib/Topology/Homotopy/Product.lean 8 10 ['Sebi-Kumar', 'alreadydone', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'mattrobball'] mattrobball
assignee:mattrobball
31-29360
1 month ago
31-29360
1 month ago
14-30316
14 days
29282 Jlh18
author:Jlh18
feat(CategoryTheory): HasColimits instance onGrpd Show that the category of groupoids has all small colimits, as a coreflective subcategory of `Cat`, which has all small colimits. The right adjoint of the forgetful functor is the core functor `CategoryTheory.Core.functor`. - [ ] depends on: #29283 [Core of a category as a functor] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict blocked-by-other-PR 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
16-57975
16 days ago
16-57976
16 days ago
0-396
6 minutes
29283 Jlh18
author:Jlh18
feat(CategoryTheory): define forgetful-core adjunction between Cat and Grpd * Define `CategoryTheory.Core.functor`: the functor `Cat ⥤ Grpd` that on objects takes the core of a category * Define `CategoryTheory.Core.adjunction`: the adjunction with the forgetful functor `Grpd.forgetToCat` on the left, and the core functor `Core.functor` on the right. * Hence provide an instance that `Grpd.forgetToCat` is coreflective. - [ ] depends on: #29284 [Extra lemmas in CategoryTheory.Core] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict blocked-by-other-PR 104/4 Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/CategoryTheory/Category/Grpd.lean,Mathlib/CategoryTheory/Core.lean,Mathlib/CategoryTheory/Groupoid/Grpd/Core.lean 5 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
16-57974
16 days ago
16-57974
16 days ago
0-3572
59 minutes
27821 BGuillemet
author:BGuillemet
feat(CategoryTheory/Sites/Sheaf): functorial version of Sheaf.homEquiv Add two functorial versions of Sheaf.homEquiv, one using `yoneda` and the other using `coyoneda`. --- - [ ] depends on: #27819 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory blocked-by-other-PR 174/19 Mathlib/CategoryTheory/Sites/Sheaf.lean,Mathlib/CategoryTheory/Yoneda.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
14-42738
14 days ago
14-42765
14 days ago
0-2066
34 minutes
29812 Jlh18
author:Jlh18
refactor: weaken HasPullbacks to HasPullback in MorphismProperty.Limits The `HasPullbacks` instance on a category `C` for defining the `baseChange` / pullback functor along a map `f : X -> Y` between their over categories can be weakened to just a `HasPullback` condition on `f`. - [ ] depends on: #29795 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory blocked-by-other-PR 31/22 Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/CommSq.lean,Mathlib/CategoryTheory/MorphismProperty/Limits.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
14-35391
14 days ago
14-43891
14 days ago
0-1983
33 minutes
29151 yuanyi-350
author:yuanyi-350
feat: Corollary of Hahn–Banach theorem In this PR, I have proved [Rudin, *Functional Analysis* (Theorem 3.7)][rudin1991] which is a step in proving the Closed Range Theorem. Also, I have added tags for the corresponding theorems in Rudin to mathlib. 3.7 Theorem. Suppose B is a convex, balanced, closed set in a locally convex space $X, x_0 \in X$, but $x_0 \notin B$. Then there exists $\Lambda \in X^*$ such that $|\Lambda x| \leq 1$ for all $x \in B$, but $\Lambda x_0>1$ proof. Since $B$ is closed and convex, we can apply (b) of Theorem 3.4, with $A=\{ x_0 \}$ , to obtain $\Lambda_1 \in X^*$ such that $\Lambda_1 x_0=r e^{i \theta}$ lies outside the closure $K$ of $\Lambda_1(B)$. Since $B$ is balanced, so is $K$. Hence there exists $s, 0 List.Vector.* - ... Deletions: - Nat.bit1_add_bit1 - ... Any other comments you want to keep out of the PR commit should go below the `---`, and placed outside this HTML comment, or else they will be invisible to reviewers. If this PR depends on other PRs, please list them below this comment, using the following format: - [ ] depends on: #xyz [optional extra text] --> [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor awaiting-author blocked-by-other-PR 70/3 Mathlib/Analysis/NormedSpace/HahnBanach/Separation.lean,Mathlib/Analysis/RCLike/Lemmas.lean,Mathlib/Topology/Order/OrderClosed.lean 3 14 ['faenuccio', 'fpvandoorn', 'github-actions', 'mathlib4-dependent-issues-bot', 'mcdoll', 'themathqueen', 'yuanyi-350'] faenuccio
assignee:faenuccio
8-71452
8 days ago
8-71454
8 days ago
21-29486
21 days

PRs not into the master branch

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
13158 erdOne
author:erdOne
refactor(RingTheory/OreLocalization/Module): remove `LocalizedModule.mk`. --- - [x] depends on: #13151 - [ ] depends on: #13156 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
49/48 Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/OreLocalization/Module.lean 2 1 ['leanprover-community-mathlib4-bot'] nobody
451-49107
1 year ago
451-49130
1 year ago
0-0
0 seconds
11156 smorel394
author:smorel394
feat(LinearAlgebra/{TensorProductBasis,Dual}): basis and dual of `PiTensorProduct` Construct a basis of a `PiTensorProduct` of modules given bases of the modules, and relationship between the dual of a `PiTensorProduct` and the `PiTensorProduct` of the duals. Main results: * `Basis.piTensorProduct` (in `LinearAlgebra/TensorProductBasis.lean`): Let `ι` be a `Fintype` and `M` be a family of modules indexed by `ι`. If `b i : κ i → M i` is a basis for every `i` in `ι`, then `fun (p : Π i, κ i) ↦ ⨂ₜ[R] i, b i (p i)` is a basis of `⨂[R] i, M i`. * `PiTensorProduct.dualDistrib` (in `LinearAlgebra/Dual.lean`): The canonical linear map from `⨂[R] i, Dual R (M i)` to `Dual R (⨂[R] i, M i)`, sending `⨂ₜ[R] i, f i` to the composition of `PiTensorProduct.map f` with the linear equivalence `⨂[R] i, R →ₗ R` given by multiplication. * `PiTensorProduct.dualDistribEquiv` (also in `LinearAlgebra/Dual.lean`): A linear equivalence between `⨂[R] i, Dual R (M i)` and `Dual R (⨂[R] i, M i)` when all `M i` are finite free modules. If `f : (i : ι) → Dual R (M i)`, then this equivalence sends `⨂ₜ[R] i, f i` to the composition of `PiTensorProduct.map f` with the natural isomorphism `⨂[R] i, R ≃ R` given by multiplication. - [ ] depends on: #11155 (currently used as the base branch; do not merge without switching it back to `master`!) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-algebra merge-conflict please-adopt blocked-by-other-PR
label:t-algebra$
166/2 Mathlib/LinearAlgebra/DirectSum/Finsupp.lean,Mathlib/LinearAlgebra/Dual.lean,Mathlib/LinearAlgebra/TensorProduct/Basis.lean 3 4 ['eric-wieser', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
277-48333
9 months ago
322-63961
10 months ago
0-0
0 seconds

PRs with an 'approved' review

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Approval(s) Updated Last status change total time in review
9352 chenyili0818
author:chenyili0818
feat: arithmetic lemmas for `gradient` This file is based on Mathlib.Analysis.Calculus.Gradient.Basic, and describes the calculation properties Co-authored-by: Ziyu Wang [tropicalfish910@gmail.com](mailto:tropicalfish910@gmail.com) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 404/0 Mathlib.lean,Mathlib/Analysis/Calculus/Gradient/Lemmas.lean 2 30 ['chenyili0818', 'github-actions', 'jcommelin', 'sgouezel', 'winstonyin'] nobody 1
429-68427
1 year ago
591-49592
1 year ago
51-80670
51 days
11890 adomani
author:adomani
feat: the terminal refine linter A linter that warns on usages of `refine` and `refine'` as a finishing tactic. See this [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Usage.20of.20refine'). ### Conclusion of the experiment Systematic replacements of terminal `refine` with `exact` leads to an overall slow-down. --- - [ ] depends on: #15616 (disable the linter in downstream projects) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter awaiting-author 77/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/TerminalRefineLinter.lean 3 14 ['adomani', 'github-actions', 'grunweg', 'joneugster', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'urkud'] nobody 1
410-68911
1 year ago
410-68913
1 year ago
18-13508
18 days
18461 hannahfechtner
author:hannahfechtner
feat: left and right common multiples mixins add mixins for left and right common multiples. These carry the data of what factors are used to create the common multiples --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra awaiting-author
label:t-algebra$
78/0 Mathlib/Algebra/Group/Defs.lean 1 13 ['github-actions', 'hannahfechtner', 'jcommelin', 'kbuzzard', 'kim-em', 'trivial1711'] nobody 1
256-64099
8 months ago
256-64099
8 months ago
69-35596
69 days
22159 shetzl
author:shetzl
feat: add definition of pushdown automata Add the definition of pushdown automata and their two acceptance conditions: acceptance based on empty stack and acceptance based on final state. Co-authored-by: Tobias Leichtfried --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor awaiting-author 70/0 Mathlib.lean,Mathlib/Computability/PDA.lean 2 34 ['YaelDillies', 'github-actions', 'madvorak', 'shetzl'] nobody 1
200-64449
6 months ago
200-64449
6 months ago
20-81771
20 days
18210 vihdzp
author:vihdzp
feat(Order/Hom/Basic): `WithBot (Fin n) ≃o Fin (n + 1)` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author 16/0 Mathlib/Order/Hom/Basic.lean 1 8 ['Command-Master', 'Ruben-VandeVelde', 'github-actions', 'urkud', 'vihdzp'] nobody 2
162-8324
5 months ago
333-12402
10 months ago
10-77913
10 days
21276 GabinKolly
author:GabinKolly
feat(ModelTheory/Substructures): define equivalences between equal substructures Define first-order equivalences between equal substructures, and prove related properties. --- This is some preparatory work for #18876 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic awaiting-author 62/0 Mathlib/ModelTheory/Substructures.lean 1 19 ['GabinKolly', 'YaelDillies', 'fpvandoorn', 'github-actions', 'grunweg'] nobody 1
147-37160
4 months ago
147-37160
4 months ago
46-55730
46 days
21624 sinhp
author:sinhp
feat(CategoryTheory): The (closed) monoidal structure on the product category of families of (closed) monoidal categories Given a family of closed monoidal categories, we show that the product of these categories is a closed monoidal category with the pointwise monoidal structure. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 144/0 Mathlib.lean,Mathlib/CategoryTheory/Pi/Basic.lean,Mathlib/CategoryTheory/Pi/Monoidal.lean,Mathlib/CategoryTheory/Pi/MonoidalClosed.lean 4 19 ['TwoFX', 'YaelDillies', 'b-mehta', 'github-actions', 'jcommelin', 'sinhp'] nobody 1
136-71077
4 months ago
136-71077
4 months ago
54-54882
54 days
22919 plp127
author:plp127
feat(Data/Fintype/Pi): Make `Fintype` instance for `RelHom`s computable Makes the `Fintype` instance for rel homs computable. See this [Zulip](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Classical.20vs.20constructive.20logic.20in.20computation/near/496220816) message. --- - [x] depends on: #24748 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-author 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 29 ['IvanRenison', 'b-mehta', 'eric-wieser', 'fpvandoorn', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'plp127'] b-mehta
assignee:b-mehta
1
127-83681
4 months ago
127-83681
4 months ago
73-73341
73 days
20924 tomaz1502
author:tomaz1502
feat(Computability/QueryComplexity): Oracle-based computation This PR adds the types and lemmas for oracle-based computation. In this model, computations are run on a monad which also counts the number of oracle queries executed. With it, it becomes possible to reason about the upper bound of the query complexity of algorithms. In the future, we could extend this work to include the necessary bits from information theory and probability to also reason about lower bounds on query complexity, like the work in https://github.com/girving/debate. Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2318629.20runtime.20complexity.20of.20sorting.20a.20list Co-authored-by: Geoffrey Irving --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability 305/0 Mathlib.lean,Mathlib/Computability/QueryComplexity/Basic.lean,Mathlib/Computability/QueryComplexity/Defs.lean 3 59 ['eric-wieser', 'girving', 'github-actions', 'quangvdao', 'tomaz1502'] nobody 1
102-45976
3 months ago
254-39164
8 months ago
254-39145
254 days
22366 kim-em
author:kim-em
feat: `check_equalities` tactic for diagnosing defeq problems The `check_equalities` tactic, which checks the typing of equalities in the goal, reporting discrepancies between the implicit type argument of the equality, and the inferred types of the left and right hand sides, at "instances and reducible" transparency. Reports from this tactic do not necessarily indicate a problem, although typically `simp` should reduce rather than increase the reported discrepancies. `check_equalities` may be useful in diagnosing uses of `erw`. t-meta delegated 118/3 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Basic.lean,Mathlib/Tactic/CategoryTheory/CheckCompositions.lean,Mathlib/Tactic/CheckEqualities.lean,Mathlib/Tactic/Common.lean,MathlibTest/check_equalities.lean 7 16 ['adomani', 'b-mehta', 'eric-wieser', 'github-actions', 'grunweg', 'kim-em', 'mathlib-bors'] nobody 1
63-50856
2 months ago
203-43425
6 months ago
15-14325
15 days
25758 YaelDillies
author:YaelDillies
chore: shortcut instance `CompleteLattice α → PartialOrder α` This avoids using the path `CompleteLattice α → CompletePartialOrder α → PartialOrder α` that goes through `Order.CompletePartialOrder` and makes it appear used to our automation, such as `shake` or `#min_imports`. This is a followup to #25358. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 7/0 Mathlib/Order/CompleteLattice/Defs.lean 1 6 ['Ruben-VandeVelde', 'eric-wieser', 'github-actions', 'leanprover-bot'] bryangingechen
assignee:bryangingechen
1
63-8005
2 months ago
94-15745
3 months ago
113-66323
113 days
24730 YaelDillies
author:YaelDillies
feat(RingTheory): group-like elements Define group-like elements in a bialgebra, ie elements such that `η a = 1` and `Δ a = a ⊗ₜ a`. We prove that group-like elements of a coalgebra over a domain are linearly independent, group-like elements of a bialgebra form a monoid, group-like elements of a Hopf algebra form a group. From Toric Co-authored-by: Michał Mrugała --- - [x] depends on: #24747 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory toric 309/0 Mathlib.lean,Mathlib/RingTheory/Bialgebra/GroupLike.lean,Mathlib/RingTheory/Coalgebra/GroupLike.lean,Mathlib/RingTheory/HopfAlgebra/GroupLike.lean 4 42 ['Julian-Kuelshammer', 'Parcly-Taxel', 'Whysoserioushah', 'YaelDillies', 'erdOne', 'eric-wieser', 'github-actions', 'leanprover-bot', 'mathlib4-dependent-issues-bot', 'smorel394'] eric-wieser
assignee:eric-wieser
2
59-63219
1 month ago
59-63219
1 month ago
146-20270
146 days
23669 erdOne
author:erdOne
feat(FieldTheory): abelian extensions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra delegated
label:t-algebra$
74/0 Mathlib.lean,Mathlib/FieldTheory/Galois/Abelian.lean,Mathlib/NumberTheory/Cyclotomic/Gal.lean 3 16 ['acmepjz', 'alreadydone', 'chrisflav', 'erdOne', 'github-actions', 'mathlib-bors', 'riccardobrasca', 'xroblot'] riccardobrasca
assignee:riccardobrasca
3
58-51033
1 month ago
87-55273
2 months ago
29-68817
29 days
27534 PierreQuinton
author:PierreQuinton
feat: a typeclass for `sSup`/`sInf` to be lawful Adds lawful infima and suprema type classes. A preorder with lawful suprema: whenever a set has a least upper bound, `sSup` returns a least upper bound for that set. A preorder with lawful infima: whenever a set has a greatest lower bound, `sInf` returns a greastest lower bound for that set. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 121/8 Mathlib.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/LawfulSupInf.lean 3 25 ['PierreQuinton', 'YaelDillies', 'github-actions', 'plp127', 'vihdzp'] YaelDillies
assignee:YaelDillies
1
56-58169
1 month ago
68-41466
2 months ago
68-41494
68 days
25779 robin-carlier
author:robin-carlier
feat(CategoryTheory/Bicategory/NaturalTransformations): strong and lax natural transformations of lax functors Given two lax functors `F G` between bicategories, we define lax natural transformations as families of 1-morphisms `∀ a : B, F.obj a ⟶ G.obj a` equipped with a naturality 2-cell `∀ {a b : B} (f : a ⟶ b), app a ≫ G.map f ⟶ F.map f ≫ app b` that are required to satisfy conditions such as naturality, and compatibility with the `mapId` and `mapComp` fields of the source and target functors. This notion dualizes the existing notion of oplax natural transformations between, and tries to narrow the current gap between lax and oplax functors in the library, where the latter has much more formalized API. For maintainability, The code tries to stay as aligned as possible with the code in `CategoryTheory.Bicategory.Naturaltransformations.Oplax`. --- I followed the book by Johnson and Yau for the definition. I made @yuma-mizuno and @callesonne authors of the files, as they are the authors of the original code for Oplax functors, which I basically copy-pasted and modified to make it work with lax functors. They should feel free to modify this if they want. Next thing on the list is to tackle modifications between lax/strong natural transforms of lax transforms, as well as the category instance on lax functors. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #25565.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/25565* t-category-theory 286/0 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Lax.lean,scripts/noshake.json 3 3 ['github-actions', 'yuma-mizuno'] joelriou
assignee:joelriou
1
56-8011
1 month ago
90-69628
2 months ago
112-27989
112 days
27180 ADedecker
author:ADedecker
feat: quotient of a monoid with zero by a multiplicative congruence --- My motivation is getting a more conceptual construction of [ValuativeRel.ValueGroupWithZero](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/Valuation/ValuativeRel.html#ValuativeRel.ValueGroupWithZero), but I think this is of independent interest. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra delegated
label:t-algebra$
141/26 Mathlib.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/GroupWithZero.lean 5 31 ['ADedecker', 'eric-wieser', 'github-actions', 'mathlib-bors', 'ocfnash'] ocfnash
assignee:ocfnash
1
51-51632
1 month ago
51-64840
1 month ago
28-12053
28 days
27302 tristan-f-r
author:tristan-f-r
feat(Fintype/Quotient): finLiftOn₂ The combination of [`Quotient.finLiftOn`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Fintype/Quotient.html#Quotient.finLiftOn) and [`liftOn₂`](https://leanprover-community.github.io/mathlib4_docs/Init/Core.html#Quotient.liftOn%E2%82%82). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 19/0 Mathlib/Data/Fintype/Quotient.lean 1 10 ['github-actions', 'kckennylau', 'tristan-f-r', 'vihdzp'] nobody 2
46-79077
1 month ago
76-4316
2 months ago
76-4352
76 days
24514 b-mehta
author:b-mehta
chore(Int/GCD): use fuel in xgcd Modify the definition of xgcd to use fuel recursion, to allow it to be reduced in the kernel. As a consequence, this means the evaluation of field operations in ZMod p become provable by `rfl` and `decide`. Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/opaque.20recursion.20definitions.20break.20mergeSort.20decidability --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-author 44/22 Mathlib/Data/Int/GCD.lean 1 5 ['astrainfinita', 'b-mehta', 'eric-wieser', 'github-actions', 'nomeata', 'urkud'] nobody 1
44-68449
1 month ago
97-11146
3 months ago
58-34020
58 days
26078 kckennylau
author:kckennylau
feat(AlgebraicGeometry): add x, y, px, py for points on elliptic curves --- Split from #25218. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry awaiting-author 44/0 Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean 1 12 ['MichaelStollBayreuth', 'Multramate', 'acmepjz', 'dagurtomas', 'github-actions', 'kckennylau'] dagurtomas
assignee:dagurtomas
1
43-43164
1 month ago
43-43164
1 month ago
64-11252
64 days
28766 yury-harmonic
author:yury-harmonic
feat(Nat/Factorial): add tail-recursive versions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 58/1 Mathlib/Data/Nat/Factorial/Basic.lean 1 1 ['github-actions', 'plp127'] nobody 1
41-7291
1 month ago
42-73779
1 month ago
42-73824
42 days
26914 quangvdao
author:quangvdao
feat(Data/PFunctor/Univariate): more definitions for univariate `PFunctor` This PR defines several basic definitions of `PFunctor`, including zero, one, constants, monomials, coproduct (sum), product, sigma, pi, tensor product, universe lifting, and equivalence. We also add: (1) simple lemmas connecting the basic definitions, (2) an automatically derived ext lemma for `PFunctor` via `@[ext]` attribute Some things I'm not clear on: - I define `HAdd` and `HMul` instances for coproduct and product of poly functors having different universe levels. Should I also define `Add` and `Mul` instances for poly functors having the same universe level? - Is it ok to define notation for tensor product, i.e. `@[inherit_doc] scoped infixr:80 " ⊗ " => tensor`? I'm worried it might clash with other notation. - Need a double-check on the priority of notation. Some future definitions to add: - Various equivalences arising from arithmetic identities, e.g., `P + 0 ≃ₚ P`. - Definitions of Lenses and Charts (each of them will be a file or even a folder) - Exponential objects (corresponding to both `prod` and `tensor`) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 144/5 Mathlib/Data/PFunctor/Univariate/Basic.lean 1 19 ['alexkeizer', 'eric-wieser', 'github-actions', 'quangvdao'] eric-wieser
assignee:eric-wieser
1
37-41364
1 month ago
87-9071
2 months ago
87-9110
87 days
28441 euprunin
author:euprunin
chore(GroupTheory/Perm): golf entire `mem_of_formPerm_ne_self` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory awaiting-author 2/5 Mathlib/GroupTheory/Perm/List.lean 1 2 ['JonBannon', 'github-actions', 'tb65536'] tb65536
assignee:tb65536
1
36-33105
1 month ago
36-33105
1 month ago
13-75804
13 days
28390 euprunin
author:euprunin
chore(Analysis/LocallyConvex): golf entire `polar_weak_closed` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 1/4 Mathlib/Analysis/LocallyConvex/Polar.lean 1 2 ['JonBannon', 'github-actions', 'j-loreaux'] j-loreaux
assignee:j-loreaux
1
34-3846
1 month ago
34-3846
1 month ago
16-76176
16 days
23940 YaelDillies
author:YaelDillies
feat: polytopes From Toric Co-authored-by: Matthew Johnson --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) toric t-analysis awaiting-author 65/0 Mathlib.lean,Mathlib/Geometry/Convex/Polytope.lean,Mathlib/Geometry/Convex/README.md 3 11 ['Parcly-Taxel', 'YaelDillies', 'eric-wieser', 'github-actions', 'j-loreaux', 'jsm28', 'leanprover-community-bot-assistant', 'ooovi'] j-loreaux
assignee:j-loreaux
1
31-35803
1 month ago
31-35819
1 month ago
143-64212
143 days
28929 grunweg
author:grunweg
experiment: use `fun_prop` in Homeomorph Can we make the continuity auto-parameters use `fun_prop`? Or perhaps `first |fun_prop; |dsimp; fun_prop`? --- Compared to #13994, it seems this is a much smoother experience. I suspect the RefineDiscTree changes have helped (but that is pure speculation). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 13/5 Mathlib/MeasureTheory/Group/Measure.lean,Mathlib/Topology/Algebra/Algebra/Equiv.lean,Mathlib/Topology/Algebra/Constructions/DomMulAct.lean,Mathlib/Topology/Algebra/ContinuousMonoidHom.lean,Mathlib/Topology/Constructions/SumProd.lean,Mathlib/Topology/Homeomorph/Defs.lean 6 4 ['euprunin', 'github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] PatrickMassot
assignee:PatrickMassot
1
31-8007
1 month ago
39-12285
1 month ago
39-17599
39 days
26790 FlAmmmmING
author:FlAmmmmING
feat(Combinatorics/Enumerative/Bell.lean): define standard Bell number --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 46/1 Mathlib/Combinatorics/Enumerative/Bell.lean 1 11 ['AntoineChambert-Loir', 'FlAmmmmING', 'eric-wieser', 'github-actions', 'kckennylau', 'madvorak'] awainverse
assignee:awainverse
1
29-76680
29 days ago
90-39806
2 months ago
90-39846
90 days
26310 kckennylau
author:kckennylau
Binary form This PR provides the basic definition of binary forms, which are homogeneous polynomials in two variables. --- - [ ] depends on: #26312 - [ ] depends on: #26313 - [ ] depends on: #26314 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
73/0 Mathlib.lean,Mathlib/RingTheory/MvPolynomial/BinaryForm.lean 2 13 ['MichaelStollBayreuth', 'github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot', 'ocfnash'] ocfnash
assignee:ocfnash
1
29-49210
29 days ago
45-38881
1 month ago
57-1104
57 days
29040 PMKielstra
author:PMKielstra
feat: trapezoidal rule for integration This PR defines the trapezoidal rule and proves the standard error bound on it in terms of bounds on the second derivative. I have vague plans of using this plus interval arithmetic to develop a tactic that can automatically close goals of the form `\integral x in a..b, f x < y` or similar. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability 273/0 Mathlib.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/TrapezoidalRule.lean 3 40 ['PMKielstra', 'github-actions', 'tb65536'] kex-y
assignee:kex-y
1
28-8007
28 days ago
37-14900
1 month ago
37-15339
37 days
26453 jburroni
author:jburroni
feat(Data/PNat/Basic): add order-related instances to PNat Add `SuccAddOrder ℕ+` and `NoMaxOrder ℕ+` instances. This allows, for example, the use of lemmas related to `Intervals` built with ℕ+. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 31/0 Mathlib.lean,Mathlib/Data/PNat/Order.lean 2 14 ['Ruben-VandeVelde', 'eric-wieser', 'github-actions', 'jburroni', 'vihdzp'] ericrbg
assignee:ericrbg
1
25-33873
25 days ago
25-38877
25 days ago
95-41188
95 days
26462 PSchwahn
author:PSchwahn
feat(LinearAlgebra/Projection): add results about inverse of `Submodule.prodEquivOfIsCompl` Add two theorems `Submodule.prodEquivOfIsCompl_symm_apply` and `Submodule.prodEquivOfIsCompl_symm_add`, which are API for `Submodule.prodEquivOfIsCompl`. We believe these theorems are useful; for example, we have used their statements in a [classification formalization project](https://github.com/LieLean/LowDimSolvClassification). Co-authored by: - [Viviana del Barco](https://github.com/vdelbarc) - [Gustavo Infanti](https://github.com/GuQOliveira) - [Exequiel Rivas](https://github.com/erivas) --- I am not sure whether the `prodEquivOfIsCompl_symm_apply` theorem should be tagged with `@[simp]`; this might lead to confluence issues. Opinions are welcome! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra awaiting-author
label:t-algebra$
10/0 Mathlib/LinearAlgebra/Projection.lean 1 7 ['PSchwahn', 'github-actions', 'joelriou', 'kckennylau'] joelriou
assignee:joelriou
1
25-12151
25 days ago
25-43254
25 days ago
73-43225
73 days
26614 Rida-Hamadani
author:Rida-Hamadani
feat(SimpleGraph): add more API for `take`/`drop` These came up while proving the Girth-Diameter inequality. The main lemma proves that taking `n` vertices of a walk results in a sub-walk of taking `k` vertices when `n` is less than or equal to `k`. The sub-walk relation is represented as `p.support.Sublist q.support` where `p` and `q` are walks. - [ ] depends on: #26655 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics awaiting-author 74/0 Mathlib/Combinatorics/SimpleGraph/Walk.lean 1 18 ['Rida-Hamadani', 'b-mehta', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody 1
24-15784
24 days ago
24-15816
24 days ago
4-83551
4 days
26544 vihdzp
author:vihdzp
feat(SetTheory/ZFC/Ordinal): Lean ordinals to ZFC ordinals We define `Ordinal.toZFSet` and prove that its outputs are precisely the ZFC ordinals. Moved from #19985. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-set-theory 166/5 Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Ordinal.lean,Mathlib/SetTheory/ZFC/PSet.lean,Mathlib/SetTheory/ZFC/Rank.lean 4 23 ['alreadydone', 'github-actions', 'leanprover-community-bot-assistant', 'staroperator', 'vihdzp'] b-mehta
assignee:b-mehta
1
19-7985
19 days ago
26-62943
26 days ago
53-40301
53 days
25183 YaelDillies
author:YaelDillies
feat: convolution product on linear maps from a coalgebra to an algebra Construct the ring structure on linear maps `C → A` where `C` is a coalgebra and `A` an algebra, where multiplication is given by `(f * g)(x) = ∑ f x₍₁₎ * g x₍₂₎` in Sweedler notation or ``` | μ | | / \ f * g = f g | | \ / δ | ``` diagrammatically, where `μ` stands for multiplication and `δ` for comultiplication. [Zulip](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/.60Mul.60.20instance.20on.20algebra.20homomorphisms.20from.20monoid.20algebra) From Toric Co-authored-by: Michał Mrugała Co-authored-by: Yunzhou Xie --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) toric t-algebra
label:t-algebra$
263/10 Mathlib.lean,Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/RingTheory/Coalgebra/Basic.lean,Mathlib/RingTheory/Coalgebra/Convolution.lean,Mathlib/RingTheory/Regular/RegularSequence.lean 7 86 ['YaelDillies', 'erdOne', 'eric-wieser', 'github-actions', 'kbuzzard', 'smorel394', 'themathqueen'] kbuzzard
assignee:kbuzzard
1
18-47471
18 days ago
36-63143
1 month ago
131-29192
131 days
28487 euprunin
author:euprunin
chore(RingTheory): golf entire `smul_eq_zero_of_mem`, `hasEval`, `eq_of_prod_eq_prod` and `isIntegral_of_mem_ringOfIntegers` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author 7/16 Mathlib/RingTheory/Extension/Basic.lean,Mathlib/RingTheory/PowerSeries/Substitution.lean,Mathlib/RingTheory/UniqueFactorizationDomain/FactorSet.lean,Mathlib/RingTheory/Valuation/AlgebraInstances.lean 4 2 ['erdOne', 'github-actions'] erdOne
assignee:erdOne
1
17-62955
17 days ago
17-62955
17 days ago
31-62497
31 days
27292 gasparattila
author:gasparattila
feat: asymptotic cone of a set This PR defines the asymptotic cone of a set in a normed affine space and proves its main properties. This is partial progress towards showing that an unbounded finite-dimensional convex set contains a ray. --- - [x] depends on: #27221 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge new-contributor t-analysis 466/0 Mathlib.lean,Mathlib/Analysis/Normed/Affine/AsymptoticCone.lean,Mathlib/Order/Filter/Map.lean,Mathlib/Topology/Algebra/AsymptoticCone.lean 4 45 ['AntoineChambert-Loir', 'YaelDillies', 'gasparattila', 'github-actions', 'mathlib4-dependent-issues-bot'] YaelDillies
assignee:YaelDillies
1
16-75947
16 days ago
59-37840
1 month ago
73-55374
73 days
27937 madvorak
author:madvorak
feat(Logic/Basic): `congr_heq₂` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic awaiting-author 6/0 Mathlib/Logic/Basic.lean 1 8 ['YaelDillies', 'fpvandoorn', 'github-actions', 'madvorak', 'vihdzp'] fpvandoorn
assignee:fpvandoorn
1
16-62490
16 days ago
42-63275
1 month ago
17-70200
17 days
28375 euprunin
author:euprunin
chore(Analysis/SpecialFunctions/Pow): golf entire `rpow_lt_rpow_of_exponent_neg`, `rpow_le_rpow_of_exponent_nonpos`, `rpow_le_of_le_log` and `rpow_lt_of_lt_log` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 8/22 Mathlib/Analysis/SpecialFunctions/Pow/Real.lean 1 3 ['JonBannon', 'Ruben-VandeVelde', 'github-actions', 'grunweg'] urkud
assignee:urkud
1
16-36382
16 days ago
16-36382
16 days ago
34-46582
34 days
28057 plp127
author:plp127
feat(SuccOrder): simp lemma to refold `Order.succ` and `Order.pred` Adds `SuccOrder.succ_eq_succ` and `PredOrder.pred_eq_pred` to refold `SuccOrder.succ` and `PredOrder.pred` into `Order.succ` and `Order.pred`. These lemmas are marked `@[simp]`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author 8/2 Mathlib/Order/SuccPred/Basic.lean 1 3 ['YaelDillies', 'github-actions', 'plp127', 'vihdzp'] bryangingechen
assignee:bryangingechen
1
14-20105
14 days ago
14-20105
14 days ago
44-13238
44 days
29047 grunweg
author:grunweg
chore(1000.yaml): add Fourier's theorem Mathlib has some form of it already; while there is space for more advanced versions, let's surface the current progress already. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) delegated 5/1 docs/1000.yaml 1 6 ['Ruben-VandeVelde', 'bryangingechen', 'github-actions', 'mathlib-bors', 'mcdoll', 'riccardobrasca'] nobody 1
13-55466
13 days ago
36-50943
1 month ago
0-17788
4 hours
26660 strihanje01
author:strihanje01
feat(Combinatorics/Additive/VerySmallDoubling): weak non-commutative Kneser's theorem add theorem about the structure of a doubling smaller than the golden ratio --- - [x] depends on: #28653 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import maintainer-merge new-contributor t-combinatorics 215/41 Mathlib/Algebra/Group/Action/Pointwise/Finset.lean,Mathlib/Combinatorics/Additive/VerySmallDoubling.lean 2 79 ['YaelDillies', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'strihanje01'] YaelDillies
assignee:YaelDillies
1
10-50518
10 days ago
10-83167
10 days ago
52-25145
52 days
28818 NotWearingPants
author:NotWearingPants
feat(Data/Setoid/Basic): add theorems about lifting a function to its kernel Currently `ker_lift_injective` and `quotientKerEquivOfRightInverse` lift `f` to `ker f` in their definition. This PR makes this function available as `Setoid.ker_lift f` and adds a few more theorems about it. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor easy 29/15 Counterexamples/AharoniKorman.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/FundamentalCone.lean,Mathlib/Topology/Separation/Hausdorff.lean 4 18 ['NotWearingPants', 'eric-wieser', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] nobody 1
10-11015
10 days ago
21-31499
21 days ago
39-46440
39 days
28871 JaafarTanoukhi
author:JaafarTanoukhi
feat(Combinatorics/Digraph): Tournaments Define orientations and tournaments. Related to #26771. Co-authored-by: Rida Hamadani --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 62/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Orientation.lean,Mathlib/Combinatorics/Digraph/Tournament.lean 3 5 ['JaafarTanoukhi', 'NotWearingPants', 'Rida-Hamadani', 'github-actions'] kmill
assignee:kmill
1
9-37654
9 days ago
40-27891
1 month ago
40-27927
40 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 t-ring-theory awaiting-author 77/8 Mathlib/Algebra/Polynomial/Coeff.lean,Mathlib/RingTheory/Polynomial/SmallDegreeVieta.lean 2 46 ['chrisflav', 'github-actions', 'kckennylau', 'mans0954', 'ocfnash'] chrisflav
assignee:chrisflav
1
9-21816
9 days ago
10-63231
10 days ago
82-34290
82 days
28295 artie2000
author:artie2000
feat(Algebra/Order/Ring/Ordering): basic results about ring (pre)orderings * Basic automation for membership of ring orderings * Alternative constructors for ring preorderings and ring orderings * Basic results about ring preorderings and their supports, including the special case over a field --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #27282 maintainer-merge t-algebra
label:t-algebra$
203/0 Mathlib.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Order/Ring/Ordering/Basic.lean 3 57 ['Rob23oba', 'YaelDillies', 'artie2000', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vihdzp'] joneugster
assignee:joneugster
1
9-7999
9 days ago
16-74338
16 days ago
22-37474
22 days
29798 Cyantain
author:Cyantain
feat(FieldTheory/IsIntegrallyClosed): lemma to judge whether an element is integral In this PR, we proved that an element is integral iff it's root of irreducible polynomial with unit leading coeff, which is an easy way to judge an element is integral or not, such as $\sqrt 5 / 4$, because it's root of $16x^2-5$ with not unit leading coeff, so it's not integral. new-contributor t-algebra delegated
label:t-algebra$
13/0 Mathlib/FieldTheory/Minpoly/IsIntegrallyClosed.lean 1 8 ['Ruben-VandeVelde', 'adomani', 'github-actions', 'kckennylau', 'mathlib-bors', 'riccardobrasca'] nobody 1
8-51852
8 days ago
8-51852
8 days ago
6-29891
6 days
28219 joelriou
author:joelriou
feat(CategoryTheory): monomorphisms in Type are stable under transfinite compositions --- - [x] depends on: #26030 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 71/0 Mathlib.lean,Mathlib/CategoryTheory/Limits/Types/Shapes.lean,Mathlib/CategoryTheory/Types/Monomorphisms.lean 3 7 ['dagurtomas', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] TwoFX
assignee:TwoFX
1
8-17257
8 days ago
8-17257
8 days ago
27-18061
27 days
29275 wwylele
author:wwylele
feat(GroupTheory): add DivisibleHull This is part of Hahn embedding theorem #27268, where an a ordered group is first embedded in a divisible group / Q-module. I am aware at #25662 there is also an ongoing rewrite of `LocalizedModule` that this PR uses. Hopefully I avoided interfering it by using mostly with public API. --- - [x] depends on: #29277 - [x] depends on: #29388 - [x] depends on: #29386 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory maintainer-merge 451/3 Mathlib.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/PNat.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Pow.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/GroupTheory/DivisibleHull.lean 6 106 ['YaelDillies', 'github-actions', 'mathlib4-dependent-issues-bot', 'vihdzp', 'wwylele'] tb65536
assignee:tb65536
2
8-7999
8 days ago
15-33876
15 days ago
25-11078
25 days
29513 grunweg
author:grunweg
fix(lint-style): parse linter options and load environment extensions correctly Parse options and load linter set extension correctly. This fixes two issues: - We never called the `toOptions` function that parses Lakefile options into a `Lean.Options` structure: the function we use instead is only meant for command-line options and doesn't handle the `weak.` prefix correctly. - The way we load linter sets was incorrect: `withImportModules` stopped updating environment extensions since [lean4#6325](https://github.com/leanprover/lean4/pull/6325), and that is exactly what we use to store linter sets. At the time of writing, `importModules` might be a suitable replacement (but this is not very safe, and not documented to be stable). Instead, write a small elaborator returning the environment at the point of elaboration, and use that instead. --- - [x] depends on: #29584 - [x] depends on: #29585 - [x] depends on: #29586 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge t-meta 28/12 scripts/lint-style.lean 1 13 ['Vierkantor', 'adomani', 'github-actions', 'grunweg', 'mathlib4-dependent-issues-bot'] nobody 1
6-48651
6 days ago
6-61968
6 days ago
15-48370
15 days
29693 kckennylau
author:kckennylau
feat(RingTheory): make Euclidean domain from DVR --- Zulip: https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Leading.20term.20of.20valuation/near/539666529 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory maintainer-merge 82/0 Mathlib/RingTheory/DiscreteValuationRing/Basic.lean 1 6 ['github-actions', 'kckennylau', 'pechersky'] chrisflav
assignee:chrisflav
1
6-7986
6 days ago
17-48607
17 days ago
18-8110
18 days
10235 urkud
author:urkud
feat: add `Decidable`, `Fintype`, `Encodable` linters This PR ports the `decidableClassical`, `fintypeFinite` and `encodableCountable` linters from mathlib3: all three are environment linters which flag declarations that have a hypothesis `[Decidable p]` etc., but do not use the underlying assumption in this type. Restructuring the code can make the statement more general. The implementation is in fact quite general, and can easily adapt to include further types. PRs #17518 and #17519 are two examples of further such linters. --- Please don't fix the failures related to `HasFDerivWithinAt.pi`. Finiteness assumptions in these lemmas will be completely removed during porting to TVS. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-bench large-import t-linter t-meta awaiting-author 123/4 Mathlib.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/TuringMachine.lean,Mathlib/Data/Fintype/Quotient.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/NumberTheory/JacobiSum/Basic.lean,Mathlib/Order/Heyting/Regular.lean,Mathlib/Tactic.lean,Mathlib/Tactic/GeneralizeProofs.lean,Mathlib/Tactic/Linter/UnusedAssumptionInType.lean 11 n/a ['Command-Master', 'github-actions', 'grunweg', 'kmill', 'leanprover-bot', 'urkud'] nobody 1
6-7311
6 days ago
unknown
unknown
28925 grunweg
author:grunweg
chore: remove `linear_combination'` tactic When `linear_combination` was refactored in #15899, the old code was kept as the `linear_combination'` tactic, for easier migration. The consensus of the zulip discussion ([#mathlib4 > Narrowing the scope of `linear_combination` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Narrowing.20the.20scope.20of.20.60linear_combination.60/near/470237816)) was to wait, and "revisit this once people have experienced the various tactics in practice". One year later, the old tactic has almost no uses: it is unused in mathlib; [searching on github](https://github.com/search?q=linear_combination%27%20path%3A*.lean&type=code) yields 37 hits --- all of which are in various forks of mathlib. Thus, removing this tactic seems appropriate. --- Do not merge before the zulip discussion has concluded! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 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 3 ['euprunin', 'github-actions', 'grunweg'] nobody 1
5-34986
5 days ago
39-20894
1 month ago
0-1
1 second
29362 stepanholub
author:stepanholub
feat:(Data/List) add the notion of period of List and prove the Periodicity Lemma Add the concept of the period of a List (word, sequence) which is missing, and prove its basic nontrivial property describing under which conditions list can have two periods known as the Periodicity Lemma (aka Fine-Wilf Theorem). --- t-data new-contributor 227/0 Mathlib.lean,Mathlib/Data/List/PeriodicityLemma.lean 2 125 ['Ruben-VandeVelde', 'Timeroot', 'fpvandoorn', 'github-actions', 'madvorak', 'plp127', 'stepanholub', 'wwylele'] nobody 2
5-26634
5 days ago
9-29448
9 days ago
27-25647
27 days
29351 staroperator
author:staroperator
feat(SetTheory/Cardinal): generalize and rename theorems on `Cardinal.sum` Some theorems on `Cardinal.sum f` are taking `f : ι → Cardinal.{max u v}`, which can be generalized to `f : ι → Cardinal.{v}`. Also rename `sum_le_iSup_lift`, `sum_lt_lift_of_isRegular`, `sum_eq_iSup_lift` etc. to reflect their signatures in names. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 79/36 Mathlib/Data/W/Cardinal.lean,Mathlib/ModelTheory/Encoding.lean,Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Cardinal/Defs.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/SetTheory/Cardinal/Ordinal.lean,Mathlib/SetTheory/Cardinal/Pigeonhole.lean,Mathlib/SetTheory/Cardinal/Regular.lean 10 5 ['github-actions', 'staroperator', 'vihdzp'] alreadydone
assignee:alreadydone
1
4-7991
4 days ago
29-14059
29 days ago
29-33248
29 days
29365 staroperator
author:staroperator
feat(SetTheory/ZFC): add `ZFSet.card` The same as `ZFSet.rank`, we define `ZFSet.card` as `ZFSet.{u} → Cardinal.{u}` and prove some basic properties. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 123/4 Mathlib.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Cardinal.lean 4 2 ['github-actions', 'staroperator', 'vihdzp'] YaelDillies
assignee:YaelDillies
1
4-7990
4 days ago
28-54689
28 days ago
28-54726
28 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 t-data awaiting-author 360/0 MathlibTest/Junk.lean 1 17 ['NotWearingPants', 'Timeroot', 'bryangingechen', 'github-actions', 'leanprover-community-bot-assistant', 'madvorak', 'pechersky', 'vihdzp'] pechersky
assignee:pechersky
2
4-3331
4 days ago
4-3331
4 days ago
96-70055
96 days
29237 harahu
author:harahu
doc: capitalize archimedean Adjectives derived from people's last names are usually capitalized in English. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 332/331 Counterexamples/MapFloor.lean,Mathlib/Algebra/ContinuedFractions/Computation/ApproximationCorollaries.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/Archimedean/Hom.lean,Mathlib/Algebra/Order/Archimedean/Submonoid.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Hom/Basic.lean,Mathlib/Algebra/Order/Module/Archimedean.lean,Mathlib/Algebra/Order/Nonneg/Floor.lean,Mathlib/Algebra/Order/Ring/Archimedean.lean,Mathlib/Algebra/Order/Ring/Basic.lean,Mathlib/Algebra/Order/Ring/IsNonarchimedean.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Normed/Algebra/Ultra.lean,Mathlib/Analysis/Normed/Field/Ultra.lean,Mathlib/Analysis/Normed/Group/Seminorm.lean,Mathlib/Analysis/Normed/Group/Ultra.lean,Mathlib/Analysis/Normed/Order/Hom/Basic.lean,Mathlib/Analysis/Normed/Order/Hom/Ultra.lean,Mathlib/Analysis/Normed/Ring/Ultra.lean,Mathlib/Analysis/Normed/Unbundled/FiniteExtension.lean,Mathlib/Analysis/Normed/Unbundled/InvariantExtension.lean,Mathlib/Analysis/Normed/Unbundled/SeminormFromBounded.lean,Mathlib/Analysis/Normed/Unbundled/SeminormFromConst.lean,Mathlib/Analysis/Normed/Unbundled/SmoothingSeminorm.lean,Mathlib/Analysis/Normed/Unbundled/SpectralNorm.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Deligne.lean,Mathlib/Data/Int/SuccPred.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Nat/SuccPred.lean,Mathlib/Data/Real/Embedding.lean,Mathlib/GroupTheory/Archimedean.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/NumberTheory/FunctionField.lean,Mathlib/NumberTheory/LSeries/DirichletContinuation.lean,Mathlib/NumberTheory/NumberField/FinitePlaces.lean,Mathlib/NumberTheory/Ostrowski.lean,Mathlib/NumberTheory/Padics/Complex.lean,Mathlib/NumberTheory/Padics/MahlerBasis.lean,Mathlib/NumberTheory/Padics/PadicIntegers.lean,Mathlib/NumberTheory/Padics/PadicNorm.lean,Mathlib/NumberTheory/Padics/ValuativeRel.lean,Mathlib/Order/Filter/AtTopBot/Archimedean.lean,Mathlib/Order/Interval/Finset/Box.lean,Mathlib/Order/SuccPred/Archimedean.lean,Mathlib/Order/SuccPred/Basic.lean,Mathlib/Order/SuccPred/IntervalSucc.lean,Mathlib/Order/SuccPred/LinearLocallyFinite.lean,Mathlib/Order/SuccPred/Tree.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/HahnSeries/Lex.lean,Mathlib/RingTheory/Valuation/Archimedean.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/Topology/Algebra/InfiniteSum/Nonarchimedean.lean,Mathlib/Topology/Algebra/Nonarchimedean/AdicTopology.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/Basic.lean,Mathlib/Topology/Algebra/Nonarchimedean/Completion.lean,Mathlib/Topology/Algebra/Nonarchimedean/TotallyDisconnected.lean,Mathlib/Topology/Algebra/OpenSubgroup.lean,Mathlib/Topology/Algebra/Order/Archimedean.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean,Mathlib/Topology/Connected/Basic.lean,Mathlib/Topology/MetricSpace/BundledFun.lean,Mathlib/Topology/MetricSpace/Ultra/Basic.lean,Mathlib/Topology/MetricSpace/Ultra/Pi.lean,Mathlib/Topology/MetricSpace/Ultra/TotallySeparated.lean,Mathlib/Topology/UniformSpace/Ultra/Basic.lean,Mathlib/Topology/UniformSpace/Ultra/Completion.lean,Mathlib/Topology/UniformSpace/Ultra/Constructions.lean 73 5 ['euprunin', 'github-actions', 'mathlib4-merge-conflict-bot'] dwrensha
assignee:dwrensha
1
3-56521
3 days ago
18-62735
18 days ago
29-63881
29 days
29257 harahu
author:harahu
doc: attach "pre", "pseudo", "semi" and "sub" as a prefixes where they are now free-standing These are all examples of [bound morphemes](https://en.wikipedia.org/wiki/Bound_and_free_morphemes) and should be attached, either in closed form or by hyphen, to some other construct. Whether to write the resulting words with a hyphen or in closed form is a stylistic choice and I am open to discussing the specifics. I've made choices based on existing literature and what I personally found natural. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 50/50 Mathlib/Algebra/Star/NonUnitalSubsemiring.lean,Mathlib/Analysis/Matrix.lean,Mathlib/Analysis/Normed/Field/WithAbs.lean,Mathlib/Analysis/Normed/Group/BallSphere.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Lean/Meta/KAbstractPositions.lean,Mathlib/Lean/Meta/RefinedDiscrTree/Initialize.lean,Mathlib/MeasureTheory/Measure/Regular.lean,Mathlib/Probability/Martingale/BorelCantelli.lean,Mathlib/Topology/EMetricSpace/Basic.lean,Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/Gluing.lean,Mathlib/Topology/MetricSpace/IsometricSMul.lean,Mathlib/Topology/MetricSpace/ProperSpace.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean,Mathlib/Topology/MetricSpace/ThickenedIndicator.lean,Mathlib/Topology/MetricSpace/Thickening.lean,Mathlib/Topology/Metrizable/Basic.lean,Mathlib/Topology/Metrizable/Uniformity.lean,scripts/autolabel.lean 21 1 ['euprunin', 'github-actions'] JovanGerb
assignee:JovanGerb
1
3-55256
3 days ago
31-30358
1 month ago
31-30398
31 days
24789 Ruben-VandeVelde
author:Ruben-VandeVelde
chore: move Algebra.Group.Hom.End to Algebra.Ring This moves us towards the goal of not depending on `Ring` under `Algebra.Group`; this is mentioned in https://github.com/leanprover-community/mathlib4/issues/11757 and on [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Call.20for.20help.3A.20technical.2F.20organisational.20debt/near/512348574). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-algebra awaiting-author
label:t-algebra$
4/10 Mathlib.lean,Mathlib/Algebra/Group/Hom/Instances.lean,Mathlib/Algebra/Module/End.lean,Mathlib/Algebra/MonoidAlgebra/Division.lean,Mathlib/Algebra/Ring/Hom/End.lean 5 9 ['Ruben-VandeVelde', 'YaelDillies', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'riccardobrasca'] riccardobrasca
assignee:riccardobrasca
1
2-60659
2 days ago
2-60659
2 days ago
14-7845
14 days
26332 Timeroot
author:Timeroot
feat(ModelTheory/Definability): TermDefinable functions This PR continues the work from #23506. Original PR: https://github.com/leanprover-community/mathlib4/pull/23506 t-logic 145/0 Mathlib/Data/Rel.lean,Mathlib/ModelTheory/Definability.lean,scripts/noshake.json 3 28 ['Timeroot', 'github-actions', 'mathlib4-merge-conflict-bot', 'staroperator'] fpvandoorn
assignee:fpvandoorn
1
2-48897
2 days ago
18-39982
18 days ago
100-1771
100 days
27552 Equilibris
author:Equilibris
chore: Move variables into `variable` declaration in typevec This will be needed to allow `M.corec` to be generic across universes --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor easy awaiting-author 16/10 Mathlib/Data/TypeVec.lean 1 12 ['Equilibris', 'eric-wieser', 'github-actions', 'pechersky', 'plp127'] pechersky
assignee:pechersky
1
2-34349
2 days ago
4-1598
4 days ago
64-38904
64 days
27673 b-reinke
author:b-reinke
feat(GroupTheory/FreeGroup): add cyclic reduction of words This PR adds the definition of `reduceCyclically`. This function produces a subword of a word `w` by cancelling the first and last letters of `w` as long as possible. If `w` is reduced, the resulting word will be cyclically reduced. It is a part of a series of PR on the theory of cyclically reduced words. Upstreamed from the [EquationalTheories](https://github.com/teorth/equational_theories) project. - [x] depends on: #25966 - [x] depends on: #27672 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory 76/0 Mathlib/GroupTheory/FreeGroup/CyclicallyReduced.lean 1 6 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vlad902'] nobody 1
1-56525
1 day ago
2-71067
2 days ago
2-72380
2 days
29743 loefflerd
author:loefflerd
feat(Topology/Algebra): discrete iff finite index subgroup discrete Show that if G is a topological group and H is a finite-index subgroup, then H is discrete iff G is. --- - [x] depends on: #29648 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 153/9 Mathlib.lean,Mathlib/Data/Set/Constructions.lean,Mathlib/Topology/Algebra/ContinuousMonoidHom.lean,Mathlib/Topology/Algebra/IsUniformGroup/DiscreteSubgroup.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/DiscreteSubset.lean 6 8 ['Ruben-VandeVelde', 'github-actions', 'loefflerd', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] j-loreaux
assignee:j-loreaux
1
1-8007
1 day ago
8-43922
8 days ago
10-84256
10 days
27207 pechersky
author:pechersky
feat(Topology/WithVal): ValuativeRel (WithVal v) with a helper valuation defined that does not pierce defeq --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology
label:t-algebra$
20/1 Mathlib/Topology/Algebra/Valued/WithVal.lean 1 8 ['alreadydone', 'github-actions', 'mathlib4-merge-conflict-bot', 'pechersky', 'smmercuri'] alreadydone
assignee:alreadydone
1
0-72436
20 hours ago
40-1037
1 month ago
73-53713
73 days
27465 erdOne
author:erdOne
feat: the definition of nonarchimedean local fields --- - [x] depends on: #27430 - [x] depends on: #27412 - [x] depends on: #27213 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge t-number-theory 214/25 Mathlib.lean,Mathlib/NumberTheory/LocalField/Basic.lean,Mathlib/RingTheory/Valuation/RankOne.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 5 61 ['erdOne', 'faenuccio', 'github-actions', 'kbuzzard', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky', 'riccardobrasca'] tb65536
assignee:tb65536
1
0-50956
14 hours ago
1-60246
1 day ago
14-71314
14 days
27400 dleijnse
author:dleijnse
feat: define geometrically reduced algebras Define geometrically reduced algebras, and prove that if all finitely generated subalgebras of an algebra `A` are geometrically reduced, then `A` is geometrically reduced. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra
label:t-algebra$
117/0 Mathlib.lean,Mathlib/RingTheory/Adjoin/FG.lean,Mathlib/RingTheory/Flat/Basic.lean,Mathlib/RingTheory/Nilpotent/Defs.lean,Mathlib/RingTheory/Nilpotent/GeometricallyReduced.lean,Mathlib/RingTheory/TensorProduct/Basic.lean 6 72 ['dleijnse', 'github-actions', 'joelriou', 'kckennylau'] joelriou
assignee:joelriou
1
0-48361
13 hours ago
0-48398
13 hours ago
67-60212
67 days
29759 NotWearingPants
author:NotWearingPants
feat(Analysis/SpecificLimits/Fibonacci): prove that the ratio of consecutive Fibonacci numbers tends to the golden ratio --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge new-contributor t-analysis 36/0 Mathlib.lean,Mathlib/Analysis/SpecificLimits/Fibonacci.lean 2 7 ['NotWearingPants', 'Ruben-VandeVelde', 'github-actions', 'kckennylau'] nobody 2
0-45099
12 hours ago
0-45100
12 hours ago
8-14078
8 days
25971 joelriou
author:joelriou
feat(CategoryTheory): pseudofunctors to Cat This PR adds convenience lemmas for pseudofunctors to `Cat`, mostly using the `to_app` attribute. The simp set for the `to_app` attribute is extended in order to take into account that in `Cat`, associators and unitors induce identities. --- - [x] depends on: #30134 This PR continues the work from #24384. Original PR: https://github.com/leanprover-community/mathlib4/pull/24384 t-category-theory 170/20 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Functor/Cat.lean,Mathlib/CategoryTheory/Bicategory/Grothendieck.lean,Mathlib/CategoryTheory/Bicategory/Strict/Pseudofunctor.lean,Mathlib/Tactic/CategoryTheory/ToApp.lean,MathlibTest/CategoryTheory/ToApp.lean 6 14 ['callesonne', 'chrisflav', 'github-actions', 'joelriou', 'mathlib4-dependent-issues-bot', 'yuma-mizuno'] nobody 1
0-33226
9 hours ago
1-31571
1 day ago
1-51199
1 day
26282 AntoineChambert-Loir
author:AntoineChambert-Loir
feat: a theorem of Jordan on primitive subgroups of the permutation group A theorem of Jordan on the primitive subgroups of a permutation group: * if it contains a swap, it is equal to the permutation group, * if it contains a 3-cycle, it contains the alternating group. This PR continues the work from #24131. --- - [x] depends on: #26281 - [x] depends on: #26280 - [x] depends on: #26279 Original PR: https://github.com/leanprover-community/mathlib4/pull/24131 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory large-import maintainer-merge 939/137 Mathlib.lean,Mathlib/Data/Set/Card.lean,Mathlib/GroupTheory/GroupAction/FixingSubgroup.lean,Mathlib/GroupTheory/GroupAction/Jordan.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/GroupTheory/GroupAction/Primitive.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfFixingSubgroup.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfStabilizer.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean,Mathlib/SetTheory/Cardinal/Embedding.lean 11 n/a ['AntoineChambert-Loir', 'adomani', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'tb65536'] nobody 1
0-30339
8 hours ago
unknown
unknown
30162 bryangingechen
author:bryangingechen
ci(label_new_contributor.yml): only trigger when PR is opened Currently, this is triggered even when new bots push a commit to a PR (e.g. the pre-commit.ci bot); adding the `types` filter will prevent the `new-contributor` label being added in such cases. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 8/1 .github/workflows/label_new_contributor.yml 1 4 ['bryangingechen', 'github-actions', 'pechersky'] nobody 1
0-27550
7 hours ago
0-50284
13 hours ago
0-50265
13 hours
29924 pelicanhere
author:pelicanhere
feat(RingTheory): local properties of semilocal rings Proves local properties of semilocal rings, which wiil be used in Iwasawa theory. For a natural language proof, see [lean-iwasawa](https://acmepjz.github.io/lean-iwasawa/blueprint/sect0002.html#a0000000013) (slightly different from this PR). > > > > [![Open in Gitpod](https://camo.githubusercontent.com/b04f5659467d23b5109ba935a40c00decd264eea25c22d50a118021349eea94f/68747470733a2f2f676974706f642e696f2f627574746f6e2f6f70656e2d696e2d676974706f642e737667)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor 183/6 Mathlib.lean,Mathlib/RingTheory/DedekindDomain/PID.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/LocalProperties/IntegrallyClosed.lean,Mathlib/RingTheory/LocalProperties/Semilocal.lean,Mathlib/RingTheory/Localization/AtPrime/Basic.lean 6 45 ['github-actions', 'kckennylau', 'pelicanhere'] chrisflav
assignee:chrisflav
1
0-8009
2 hours ago
9-84874
9 days ago
9-84916
9 days
29988 pechersky
author:pechersky
chore(RingTheory/PrimitiveRoots): switch argument for `isUnit` from `0 < k` to `k ≠ 0` Did not do this for all lemmas in `IsPrimitiveRoot` namespace which is still heterogeneous between - `NeZero k` - `0 < k` - `k ≠ 0` Note: there will always be some mismatch in hypotheses, because core has lemmas about divisibility in `0 < k` hypothesis form On the way to describing the torsion subgroup, as requested in #29517 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
26/26 Mathlib/FieldTheory/KummerExtension.lean,Mathlib/NumberTheory/Cyclotomic/CyclotomicCharacter.lean,Mathlib/NumberTheory/Cyclotomic/Rat.lean,Mathlib/NumberTheory/MulChar/Lemmas.lean,Mathlib/RingTheory/Frobenius.lean,Mathlib/RingTheory/RootsOfUnity/EnoughRootsOfUnity.lean,Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean 7 4 ['Ruben-VandeVelde', 'github-actions'] riccardobrasca
assignee:riccardobrasca
1
0-8006
2 hours ago
7-80683
7 days ago
7-80759
7 days
30154 YaelDillies
author:YaelDillies
chore(Order/Filter/Finite): clean up `protected alias` works now. Also write a module doc. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order easy ready-to-merge 4/11 Mathlib/Order/Filter/Finite.lean 1 2 ['Ruben-VandeVelde', 'bryangingechen', 'github-actions'] nobody 2
0-1621
27 minutes ago
0-1621
26 minutes ago
0-62681
17 hours
28891 joelriou
author:joelriou
feat(Analysis/Convex): functoriality of the standard simplex When `f : X → Y` is a map between finite types, and `S` is an ordered semiring, we define the maps `stdSimplex.map f : stdSimplex S X → stdSimplex S Y`. In the case `S := ℝ`, we show that these maps are continuous. In a future PR #28893, the definition of the topological simplex in `AlgebraicTopology` shall be refactored. --- - [x] depends on: #28869 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry delegated 192/1 Mathlib.lean,Mathlib/Analysis/Convex/StdSimplex.lean,Mathlib/LinearAlgebra/Finsupp/Pi.lean,Mathlib/Topology/Algebra/Monoid/FunOnFinite.lean 4 6 ['YaelDillies', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] YaelDillies
assignee:YaelDillies
1
0-1012
16 minutes ago
0-69248
19 hours ago
34-40884
34 days
29820 wwylele
author:wwylele
feat(RingTheory): {Mv}PowerSeries.{le_}{weighted}Order_prod The big operator version of `{le}_{weighted}Order_mul` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory ready-to-merge 41/0 Mathlib/RingTheory/MvPowerSeries/NoZeroDivisors.lean,Mathlib/RingTheory/MvPowerSeries/Order.lean,Mathlib/RingTheory/PowerSeries/Order.lean 3 4 ['Ruben-VandeVelde', 'bryangingechen', 'github-actions', 'wwylele'] mattrobball
assignee:mattrobball
2
0-910
15 minutes ago
0-910
14 minutes ago
14-17831
14 days
12608 eric-wieser
author:eric-wieser
feat: allow `nsmul` / `zsmul` to be omitted again, with a warning --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-meta merge-conflict awaiting-author
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
429-68430
1 year ago
478-63494
1 year ago
5-72414
5 days
12934 grunweg
author:grunweg
chore: replace more uses of > or ≥ by < or ≤ These were flagged by the linter in https://github.com/leanprover-community/mathlib4/pull/12879: it is easy to simple avoid > or ≥ in hypotheses or haves. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author help-wanted 41/42 Archive/Imo/Imo1962Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2019Q4.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib/Tactic/Linarith/Datatypes.lean,test/cancel_denoms.lean,test/congr.lean,test/interval_cases.lean,test/observe.lean 15 11 ['YaelDillies', 'adomani', 'github-actions', 'grunweg', 'jcommelin', 'urkud'] nobody 1
429-68430
1 year ago
442-78027
1 year ago
1-73101
1 day
8519 eric-wieser
author:eric-wieser
refactor(LinearAlgebra/TensorProduct): golf using `liftAddHom` This new `TensorProduct.liftAddHom` doesn't require bilinearity, only that scalar multiplication can be moved between the arguments. While in theory we only need the `AddMonoidHom` version as it offers exactly the same generality, we first provide an unbundled `liftFun` as this seems to give a sizeable performance boost if used in downstream `lift` variants. --- - [x] depends on: #8571 - [x] depends on: #8584 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author
label:t-algebra$
53/50 Mathlib/Algebra/Category/AlgebraCat/Monoidal.lean,Mathlib/LinearAlgebra/TensorProduct.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean 3 28 ['bustercopley', 'eric-wieser', 'jcommelin', 'jjaassoonn', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib-bors'] nobody 1
429-68427
1 year ago
578-40742
1 year ago
5-6524
5 days
9146 laughinggas
author:laughinggas
feat(Data/ZMod/Defs): Topological structure on `ZMod` Added a discrete topology structure to `ZMod n` for all `n` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology merge-conflict awaiting-author
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
429-68427
1 year ago
610-76555
1 year ago
7-6153
7 days
6777 adomani
author:adomani
chore(Co*variantClass): replace eta-expanded (· * ·), (· + ·), (· ≤ ·), (· < ·) Replace `CovariantClass X X (· * ·) (· ≤ ·)` with -> `CovariantClass X X HMul.hMul LE.le` and similarly for `HAdd`, `LT`, `Contravariant`. This PR is inspired by [Issue #6646](https://github.com/leanprover-community/mathlib4/issues/6646) and, more specifically, [this comment](https://github.com/leanprover-community/mathlib4/issues/6646#issuecomment-1692792066). Note that https://github.com/leanprover/lean4/pull/2267 would make this unnecessary --- ```bash # First sed command: # the first captured pattern is `Co*variantClass ` # the second captured pattern is `` # the third captured pattern is `+` or `*` # the fourth captured pattern is `<` or `≤` # a match for `Co*variantClass ·) (· ·)` becomes # `Co*variantClass replaceop replaceop` # Second sed command: similar to the first, but looks for `(Function.swap (· ·))` sed -i ' s=\(Co[ntra]*variantClass \(..*\) \2 \)(· *\([+*]\) *·) (· *\([<≤]\) *·)=\1replaceop\3 replaceop\4=g s=\(Co[ntra]*variantClass \(..*\) \2 \)(\([Functio\.swap ]*\)(· *\([+*]\) *·)) (· *\([<≤]\) *·)=\1(\3replaceop\4) replaceop\5=g s=replaceop+=HAdd.hAdd=g s=replaceop\*=HMul.hMul=g s=replaceop<=LT.lt=g s=replaceop≤=LE.le=g s=\(Co[ntra]*variantClass N N\) (· \* ·) r=\1 HMul.hMul r=g s=\(Co[ntra]*variantClass N N (swap μ)\) (· ≤ ·)=\1 LE.le=g s=\(Co[ntra]*variantClass N N\) (swap (· \* ·)) r=\1 (swap HMul.hMul) r=g s=\(CovariantClass (Filter α) (Filter α)\) (· / ·) (· ≤ ·)=\1 HDiv.hDiv LE.le=g s=\(CovariantClass (Filter α) (Filter α)\) (swap (· / ·)) (· ≤ ·)=\1 (swap HDiv.hDiv) LE.le=g s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· ≤ ·)=\1 LE.le=g s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· < ·)=\1 LT.lt=g s=\(Co[ntra]*variantClass [^}]*\) (· ≤ ·)=\1 LE.le=g s=\(CovariantClass .* (Filter β)\) (· • ·) LE.le=\1 HSMul.hSMul LE.le=g ' $(git ls-files '*.lean') ``` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 703/678 Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/Bounds.lean,Mathlib/Algebra/CovariantAndContravariant.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/GroupPower/Order.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/Archimedean.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Group/DenselyOrdered.lean,Mathlib/Algebra/Order/Group/MinMax.lean,Mathlib/Algebra/Order/Group/OrderIso.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Interval.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/LatticeGroup.lean,Mathlib/Algebra/Order/Module.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Cancel/Defs.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/Lemmas.lean,Mathlib/Algebra/Order/Monoid/MinMax.lean,Mathlib/Algebra/Order/Monoid/NatCast.lean,Mathlib/Algebra/Order/Monoid/OrderDual.lean,Mathlib/Algebra/Order/Monoid/Prod.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithZero/Basic.lean,Mathlib/Algebra/Order/Monoid/WithZero/Defs.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Pointwise.lean,Mathlib/Algebra/Order/Positive/Ring.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Lemmas.lean,Mathlib/Algebra/Order/Sub/Basic.lean,Mathlib/Algebra/Order/Sub/Canonical.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Algebra/Order/WithZero.lean,Mathlib/Algebra/Parity.lean,Mathlib/Algebra/Star/Order.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Normed/Order/Lattice.lean,Mathlib/Data/DFinsupp/Lex.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/List/BigOperators/Basic.lean,Mathlib/Data/List/BigOperators/Lemmas.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Nat/Cast/Order.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/Real/ENNReal.lean,Mathlib/Data/Real/NNReal.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/Data/Sign.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/VectorMeasure.lean,Mathlib/Order/ConditionallyCompleteLattice/Group.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Martingale/Basic.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/PGame.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/NaturalOps.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/Positivity/Basic.lean,Mathlib/Topology/ContinuousFunction/Algebra.lean,lean-toolchain,test/Recall.lean,test/propose.lean 81 36 ['adomani', 'alreadydone', 'digama0', 'eric-wieser', 'ericrbg', 'jcommelin', 'leanprover-bot', 'sgouezel'] nobody 1
429-68426
1 year ago
451-49130
1 year ago
35-56459
35 days
6403 astrainfinita
author:astrainfinita
chore: change instance priorities of `Ordered*` hierarchy --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) slow-typeclass-synthesis t-order t-algebra merge-conflict awaiting-author
label:t-algebra$
253/79 Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Field/Canonical/Defs.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/WithZero/Defs.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Star.lean,Mathlib/Algebra/Order/WithZero.lean,Mathlib/Analysis/InnerProductSpace/Orientation.lean,Mathlib/LinearAlgebra/Orientation.lean,Mathlib/RingTheory/HahnSeries.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/Tactic/Positivity/Core.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean 18 39 ['Vierkantor', 'astrainfinita', 'digama0', 'eric-wieser', 'j-loreaux', 'leanprover-bot'] nobody 1
429-68425
1 year ago
488-25495
1 year ago
13-18399
13 days
3757 thorimur
author:thorimur
feat: config options for `fail_if_no_progress` This PR creates config options for `fail_if_no_progress` that allow the user to tweak what exactly counts as "progress". This includes whether to use defeq or `BEq`, what transparency to use, and which parts of the goal and local context to check. It also splits off the comparison functionality into `Mathlib.Lean.Meta.Compare`, which provides fully configurable comparison functions for common complex metaprogramming types not specific to `fail_if_no_progress`. These types are `Expr`, `LocalDecl`, `LocalContext`, `MetavarDecl`, `MVarId`, and `List MVarId`. --- See [zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/progress.20on.20fail_if_no_progress) for a couple review questions. Status update: this PR is now basically done, save for some extra tests which should probably be included. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict WIP 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 1
429-68424
1 year ago
681-79610
1 year ago
45-49113
45 days
12751 Command-Master
author:Command-Master
feat: add lemmas for Nat/Bits, Nat/Bitwise and Nat/Size Remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor merge-conflict 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
410-45727
1 year ago
415-61969
1 year ago
54-52408
54 days
15448 urkud
author:urkud
chore(*): deprecate `Option.elim'` Use `Option.elim` instead. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt merge-conflict awaiting-author 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
410-34780
1 year ago
411-23927
1 year ago
7-18420
7 days
11800 JADekker
author:JADekker
feat : Define KappaLindelöf spaces Define KappaLindelöf spaces by following the first one-third of the API for Lindelöf spaces. The remainder will be added in a future PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-topology merge-conflict please-adopt 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
382-80598
1 year ago
383-16173
1 year ago
119-10687
119 days
11500 mcdoll
author:mcdoll
refactor(Topology/Algebra/Module/WeakDual): Clean up - Move `Dual` and `dualPairing` lower in the import-hierachy - deduplicate `dualPairing` - Bundle continuity statements to `CLM`s. - Make `WeakDual` and `WeakSpace` reducible - Remove `refine'` in favor of `refine` --- Cleaning up `Analysis/NormedSpace/WeakDual` will be done in a second PR [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict awaiting-author 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 14 ['ADedecker', 'grunweg', 'j-loreaux', 'kkytola', 'mathlib-bors', 'mcdoll'] nobody 2
360-81562
11 months ago
360-81562
11 months ago
46-5572
46 days
12133 ADedecker
author:ADedecker
feat: generalize instIsLowerProd to arbitrary products Also change a bit the proof of the product case to match my own taste, feel free to tell if you prefer the old one. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order t-topology merge-conflict awaiting-author 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
322-67632
10 months ago
322-67632
10 months ago
63-69206
63 days
17176 arulandu
author:arulandu
feat: integrals and integrability with .re Lemmas for swapping order of .re and integration/integrability. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability merge-conflict awaiting-author 49/0 Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean 4 30 ['EtienneC30', 'arulandu', 'github-actions', 'loefflerd'] nobody 1
247-29959
8 months ago
247-29959
8 months ago
9-73631
9 days
2605 eric-wieser
author:eric-wieser
chore: better error message in linarith On this mwe: ```lean import Mathlib.Tactic.Linarith example (s : Set ℕ) (h : s = s) : 0 ≤ 1 := by linarith ``` this now indicates where the internal error is coming from. Is there a better way of chaining errors than this? --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict awaiting-author 12/1 Mathlib/Tactic/Linarith/Preprocessing.lean 1 3 ['Vierkantor', 'harahu', 'kim-em', 'mo271'] nobody 1
246-46119
8 months ago
681-19406
1 year ago
4-7271
4 days
17005 YnirPaz
author:YnirPaz
feat(SetTheory/Cardinal/Regular): define singular cardinals Define singular cardinals and prove basic lemmas about them. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory merge-conflict WIP 94/1 Mathlib.lean,Mathlib/SetTheory/Cardinal/Regular.lean,Mathlib/SetTheory/Ordinal/Basic.lean 3 28 ['YaelDillies', 'YnirPaz', 'github-actions', 'vihdzp'] nobody 1
228-80291
7 months ago
304-73473
10 months ago
34-18388
34 days
18463 vihdzp
author:vihdzp
feat(SetTheory/Ordinal/Notation/FundamentalSequence): define type of fundamental sequences We define `Sequence α` as the type of sequences with length 0, 1, or `ω`, and give a basic API. A subsequent PR will introduce the notion of a (countable and computable) fundamental sequence and establish basic results. The goal of this is to generalize [`ONote.fundamentalSequence`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/SetTheory/Ordinal/Notation.html#ONote.fundamentalSequence) to allow the construction of fundamental sequences for other ordinal notations. --- See [my ordinal notation repository](https://github.com/vihdzp/ordinal-notation/blob/a6fdd7fe7cb521e686ea271902e7e5496f1804d3/OrdinalNotation/Cantor.lean#L1218) for a demonstration of how this API looks in practice. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory t-order merge-conflict 174/1 Mathlib.lean,Mathlib/SetTheory/Ordinal/Notation/Cantor.lean,Mathlib/SetTheory/Ordinal/Notation/FundamentalSequence.lean 3 19 ['YnirPaz', 'b-mehta', 'github-actions', 'vihdzp'] nobody 1
226-79668
7 months ago
226-79668
7 months ago
52-25108
52 days
15991 vihdzp
author:vihdzp
feat(SetTheory/Ordinal/CantorNormalForm): alternate CNF recursion principle The idea of this recursion principle is that you can build an ordinal by adding one power of `b` at a time, as long as `1 < b ≤ ω`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory t-logic merge-conflict awaiting-author 43/0 Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/CantorNormalForm.lean,Mathlib/SetTheory/Ordinal/Exponential.lean 3 8 ['YaelDillies', 'eric-wieser', 'github-actions', 'vihdzp'] nobody 1
199-57620
6 months ago
199-57620
6 months ago
91-50443
91 days
19189 YnirPaz
author:YnirPaz
feat(SetTheory/Ordinal/Arithmetic): order isomorphism between omega and the natural numbers --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory merge-conflict awaiting-author 44/0 Mathlib/Order/SuccPred/Limit.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean 2 21 ['YaelDillies', 'YnirPaz', 'github-actions', 'vihdzp'] nobody 1
197-1102
6 months ago
197-1102
6 months ago
47-37012
47 days
19275 eric-wieser
author:eric-wieser
fix: if nolint files change, do a full rebuild Otherwise CI will succeed when removing entries from the file, but fail later when someone changes something unrelated. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict delegated 8/0 lakefile.lean 1 20 ['YaelDillies', 'adomani', 'eric-wieser', 'github-actions', 'grunweg', 'mathlib-bors'] nobody 1
182-45963
5 months ago
182-45963
5 months ago
0-214
3 minutes
23411 PatrickMassot
author:PatrickMassot
chore: remove finiteness from Order.Filter.Lift Co-authored-by: Anatole Dedecker --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) longest-pole t-topology merge-conflict 48/21 Mathlib/Dynamics/TopologicalEntropy/DynamicalEntourage.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Finite.lean,Mathlib/Order/Filter/Lift.lean,Mathlib/Order/Filter/SmallSets.lean,Mathlib/Topology/Algebra/ContinuousMonoidHom.lean,Mathlib/Topology/Basic.lean 7 4 ['Vierkantor', 'github-actions', 'kim-em', 'leanprover-community-bot-assistant'] nobody 1
178-64030
5 months ago
178-83599
5 months ago
10-21608
10 days
19425 hrmacbeth
author:hrmacbeth
perf: gcongr forward-reasoning adjustment This PR changes the "forward-reasoning" component of `gcongr`, rendering it more efficient, particularly in problems with a large number of variables/hypotheses in the context. Previously `gcongr` attempted to match *every* `LocalDecl` against *every* node in the parse tree using *each* of the five implemented `@[gcongr_forward]` mini-tactics: matching directly, matching after applying `symm`, matching after applying `le_of_lt`, etc etc. The new algorithm filters out the non-Prop `LocalDecl`s, and also adjusts the `@[gcongr_forward]` extensions so that, rather than re-apply the relevant lemmas (`symm`, `le_of_lt`, etc) at every node in the parse tree, the lemmas are applied in advance to the `LocalDecl`s and the result (if successful) stored. The performance effect on mathlib as a whole is miniscule, but it speeds up the profiler's count of "tactic execution of Mathlib.Tactic.GCongr" in the newly-added test from 257 ms to 47 ms, and has a similar effect on real-life examples in an analysis project of mine. Co-authored-by: Mario Carneiro --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) (Note that Mario provided the ideas but not the code, so please review with appropriate diligence!) merge-conflict awaiting-author 130/59 Mathlib/Order/Lattice.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/GCongr/ForwardAttr.lean,MathlibTest/GCongr/inequalities.lean 4 17 ['Vierkantor', 'github-actions', 'hrmacbeth', 'leanprover-bot', 'leanprover-community-bot-assistant'] Vierkantor
assignee:Vierkantor
1
176-62481
5 months ago
176-62483
5 months ago
4-16654
4 days
12673 grunweg
author:grunweg
feat: add ContDiff.lipschitzOnWith A C¹ function is Lipschitz on each convex compact set. From sphere-eversion. -------- Commits can be reviewed independently. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict awaiting-author help-wanted 30/11 Mathlib/Analysis/Calculus/ContDiff/RCLike.lean 1 6 ['Ruben-VandeVelde', 'github-actions', 'grunweg', 'sgouezel'] nobody 1
169-42559
5 months ago
169-42559
5 months ago
1-7552
1 day
8370 eric-wieser
author:eric-wieser
refactor(Analysis/NormedSpace/Exponential): remove the `𝕂` argument from `exp` This argument is still needed for almost all the lemmas, which means it can longer be found by unification. We keep around `expSeries 𝕂 A`, as it's needed for talking about the radius of convergence over different base fields. This is a prerequisite for #8372, as we can't merge the functions until they have the same interface.\ Zulip thread: [#mathlib4 > Real.exp @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Real.2Eexp/near/401602245) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This is started from the mathport output on https://github.com/leanprover-community/mathlib/pull/19244 awaiting-zulip t-analysis merge-conflict 432/387 Mathlib/Analysis/CStarAlgebra/Exponential.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/Exponential.lean,Mathlib/Analysis/Normed/Algebra/MatrixExponential.lean,Mathlib/Analysis/Normed/Algebra/QuaternionExponential.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/TrivSqZeroExt.lean,Mathlib/Analysis/NormedSpace/DualNumber.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog.lean,Mathlib/Analysis/SpecialFunctions/Exponential.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Series.lean 11 29 ['YaelDillies', 'eric-wieser', 'girving', 'github-actions', 'j-loreaux', 'kbuzzard', 'leanprover-community-bot-assistant', 'urkud'] nobody 1
162-9225
5 months ago
173-37855
5 months ago
29-60989
29 days
19315 quangvdao
author:quangvdao
feat(Data/Finsupp/Fin): Add `Finsupp` operations on `Fin` tuple This PR adds more analogues of operations on `Fin` tuples to the `Finsupp` setting. Before, there were only `Finsupp.cons` and `Finsupp.tail`. Now there are also `Finsupp.snoc`, `Finsupp.insertNth`, `Finsupp.init`, and `Finsupp.removeNth`. These all come with supporting lemmas. I also removed the porting comment about `succAboveCases` in `Data/Fin/Basic`, and added a lemma about `succAbove` in `Data/Fin/Tuple/Basic`. --- - [x] depends on: #20361 - [x] depends on: #20771 - [x] depends on: #20770 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict awaiting-author 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
150-19086
4 months ago
150-19086
4 months ago
43-81255
43 days
7907 urkud
author:urkud
feat: introduce `NthRoot` notation class Also use it for `Real.sqrt`, and replace the few occurrences of `sqrt` that do not already use the notation. --- [Zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/.60Sqrt.60.20notation.20typeclass/near/400086502) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-analysis awaiting-CI merge-conflict
label:t-algebra$
193/156 Archive/Imo/Imo1959Q2.lean,Archive/Imo/Imo1960Q2.lean,Archive/Imo/Imo2001Q2.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2008Q4.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Mathlib.lean,Mathlib/Algebra/NthRoot.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/Complex/AbelLimit.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/SpecialFunctions/Pow/Asymptotics.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Analysis/SpecialFunctions/Stirling.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Bounds.lean,Mathlib/Data/Real/GoldenRatio.lean,Mathlib/Data/Real/Sqrt.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/MeasureTheory/Measure/Lebesgue/VolumeOfBalls.lean,Mathlib/NumberTheory/Harmonic/GammaDeriv.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/ConvexBody.lean,Mathlib/NumberTheory/NumberField/ClassNumber.lean,Mathlib/NumberTheory/NumberField/Discriminant/Basic.lean,Mathlib/Probability/Distributions/Gaussian.lean,MathlibTest/positivity.lean 28 9 ['eric-wieser', 'github-actions', 'kmill', 'urkud'] nobody 1
148-46200
4 months ago
402-59758
1 year ago
0-0
0 seconds
13685 niklasmohrin
author:niklasmohrin
feat(Combinatorics): add definitions for network flows Although we might not have any super-interesting results ready for mathlib yet, I feel that the definitions from this commit are already mature enough to include. These definitions are ported from last semester's work we did at https://github.com/niklasmohrin/lean-seminar-2023 and I have put some time in to refactor our code to `Int` and now to any parameter `R`. In the linked repository, there is some more stuff that I can send in. One obstacle without integer values is that it is not clear why a maximum flow would exist. I think the best way to tackle this would be to prove max-flow-min-cut theorem and implement the Ford-Fulkerson algorithm. It has been pointed out on Zulip that there is an [Isabelle formalization of the Edmonds Karp Algorithm](https://www.isa-afp.org/entries/EdmondsKarp_Maxflow.html). I feel that the definitions are pretty solid and it makes sense to include them, even if just for unifying definitions across downstream projects. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics merge-conflict awaiting-author 244/0 Mathlib.lean,Mathlib/Combinatorics/Flow/Basic.lean,docs/references.bib 3 57 ['Shreyas4991', 'YaelDillies', 'b-mehta', 'github-actions', 'leanprover-community-bot-assistant', 'madvorak', 'niklasmohrin'] nobody 1
142-9323
4 months ago
142-9325
4 months ago
86-21072
86 days
17129 joneugster
author:joneugster
feat(Tactic/Linter): add unicode linter for unicode variant-selectors Unicode characters can be followed by one of the two "variant-selectors" `\FE0E` (text) or `\FE0F` (emoji). These appear to the user as a single unicode character and they might copy them by accident. For example `✅️` (`\u2705\uFE0F`), `✅` (`\u2705`) and `✅︎` (`\u2705\uFE0E`) are three variants of the "same" unicode character. The one without variant-selector might display as either emoji or not, depending on the user's device and font. Add unicode linter ensuring variant-selector only appear on specified characters and also ensuring these characters always have the correct variant selector to avoid confusions. Everything flagged by this linter can be fixed fully automatically with `lake exe lint-style --fix` or by commenting `bot fix style` on the PR. --- - tracking PR: #16215 ## Zulip discussions: - https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Whitelist.20for.20Unicode.3F - https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Lean.20specific.20font ## Related PRs: - leanprover/lean4#5015 added some emoji-variant selectors to Emojis used in `Lean` itself. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-linter merge-conflict delegated awaiting-author 245/14 Mathlib.lean,Mathlib/GroupTheory/GroupExtension/Defs.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Linter/UnicodeLinter.lean,Mathlib/Tactic/Widget/Calc.lean,Mathlib/Tactic/Widget/CongrM.lean,Mathlib/Tactic/Widget/Conv.lean,Mathlib/Tactic/Widget/GCongr.lean,Mathlib/Topology/ContinuousMap/Weierstrass.lean,MathlibTest/LintStyleTextBased.lean 11 25 ['YaelDillies', 'adomani', 'github-actions', 'grunweg', 'joneugster', 'kim-em', 'leanprover-community-bot-assistant'] nobody 1
140-39985
4 months ago
140-39987
4 months ago
82-54712
82 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). --- - [ ] depends on: #24570 - [ ] depends on: #24953 (I did not test the last part.) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict 58/19 Mathlib/Tactic/Linter/TextBased.lean,scripts/lint-style.lean 2 19 ['Vierkantor', 'adomani', 'github-actions', 'grunweg', 'joneugster', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] joneugster
assignee:joneugster
1
130-53315
4 months ago
130-53318
4 months ago
43-17409
43 days
24965 erdOne
author:erdOne
refactor: Make `IsLocalHom` take unbundled map --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge t-algebra merge-conflict awaiting-author
label:t-algebra$
16/7 Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/AlgebraicGeometry/Scheme.lean,Mathlib/Geometry/RingedSpace/LocallyRingedSpace.lean,Mathlib/Geometry/RingedSpace/LocallyRingedSpace/HasColimits.lean,Mathlib/Geometry/RingedSpace/OpenImmersion.lean 5 6 ['alreadydone', 'erdOne', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] nobody 1
123-2026
4 months ago
123-2027
4 months ago
10-26015
10 days
17627 hrmacbeth
author:hrmacbeth
feat: universal properties of vector bundle constructions Characterizations for the smoothness of maps into the total spaces of (1) the direct sum of two vector bundles; (2) the pullback of a vector bundle. This gap in the library was exposed by #17358. --- - [x] depends on: #22804 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict delegated 311/9 Mathlib/Data/Bundle.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/Pullback.lean,Mathlib/Topology/FiberBundle/Constructions.lean 4 24 ['PatrickMassot', 'github-actions', 'grunweg', 'hrmacbeth', 'j-loreaux', 'leanprover-community-bot-assistant', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'sgouezel'] grunweg
assignee:grunweg
1
90-83873
2 months ago
90-83873
2 months ago
91-73632
91 days
26608 vihdzp
author:vihdzp
feat(SetTheory/Cardinal/Aleph): `o.card ≤ ℵ_ o` and variants --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory merge-conflict 24/0 Mathlib/SetTheory/Cardinal/Aleph.lean 1 3 ['github-actions', 'kckennylau', 'leanprover-community-bot-assistant'] nobody 1
70-27056
2 months ago
70-27057
2 months ago
23-63406
23 days
25401 digama0
author:digama0
feat(Util): SuppressSorry option See also leanprover/lean4#8611 and [#lean4 > Silent sorry @ 💬](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/Silent.20sorry/near/503537964). This is a stop-gap solution while leanprover/lean4#8611 is underway, but it works about as well as any other built in option. Hooking declaration elaborators turns out to be a very powerful technique. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 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
51-13548
1 month ago
51-13548
1 month ago
71-28549
71 days
28150 Equilibris
author:Equilibris
chore: clean up proofs typevec proofs While adding variable universe corecs I found a lot of theorems in typevec that could do with a bit of a clean-up --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor merge-conflict 24/26 Mathlib/Data/TypeVec.lean 1 7 ['Equilibris', 'alexkeizer', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody 1
42-13470
1 month ago
42-13471
1 month ago
13-49738
13 days
27437 kckennylau
author:kckennylau
feat(RingTheory/Valuation): some lemmas about comparing with 1 and 0 and with each other *From the 2025 Local Class Field Theory Workshop.* --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict WIP 109/22 Mathlib/NumberTheory/Padics/ValuativeRel.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/Extension.lean,Mathlib/RingTheory/Valuation/ValuativeRel.lean 4 20 ['erdOne', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'matthewjasper', 'pechersky'] nobody 1
37-43603
1 month ago
37-43604
1 month ago
14-30610
14 days
26912 pechersky
author:pechersky
chore(Algebra/Ring/Subring): simp tag `Subring.smul_def` s-multiplying by a subtype is easiest to manipulate when both terms are in the ambient type. Many places that had to use the _def lemma for a rewrite, or to include it in a simp set, no longer have to. Ported from #25308 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) I found this being not-simp frustrating when talking about submodules over a valuation subring. maintainer-merge t-algebra merge-conflict
label:t-algebra$
68/67 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/RootPositive.lean,Mathlib/LinearAlgebra/RootSystem/WeylGroup.lean,Mathlib/RingTheory/Etale/Kaehler.lean,Mathlib/RingTheory/LocalProperties/Projective.lean,Mathlib/RingTheory/Localization/InvSubmonoid.lean,Mathlib/RingTheory/OreLocalization/Basic.lean 25 19 ['artie2000', 'eric-wieser', 'github-actions', 'j-loreaux', 'linesthatinterlace', 'mathlib4-merge-conflict-bot', 'pechersky'] joelriou
assignee:joelriou
1
32-49917
1 month ago
32-49918
1 month ago
51-74059
51 days
28737 astrainfinita
author:astrainfinita
refactor: deprecate `MulEquivClass` This PR continues the work from #18806. Original PR: https://github.com/leanprover-community/mathlib4/pull/18806 maintainer-merge t-algebra merge-conflict awaiting-author
label:t-algebra$
67/77 Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Algebra/Group/Irreducible/Lemmas.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/Units/Equiv.lean,Mathlib/Algebra/GroupWithZero/Equiv.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Prime/Lemmas.lean,Mathlib/Algebra/Ring/Divisibility/Basic.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/Star/MonoidHom.lean,Mathlib/Combinatorics/Additive/FreimanHom.lean,Mathlib/GroupTheory/GroupExtension/Defs.lean,Mathlib/GroupTheory/Submonoid/Center.lean,Mathlib/LinearAlgebra/FreeModule/Finite/CardQuotient.lean,Mathlib/RingTheory/Bialgebra/Equiv.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/RingTheory/UniqueFactorizationDomain/NormalizedFactors.lean,Mathlib/Topology/Algebra/ContinuousMonoidHom.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean 26 20 ['Vierkantor', 'alreadydone', 'astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] Vierkantor
assignee:Vierkantor
1
23-53777
23 days ago
23-53778
23 days ago
4-17723
4 days
21950 erdOne
author:erdOne
feat(NumberTheory/Padics): the completion of `ℚ` at a finite place is `ℚ_[p]` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory merge-conflict 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
7-46004
7 days ago
88-45941
2 months ago
79-1228
79 days
13514 madvorak
author:madvorak
feat(Computability/ContextFreeGrammar): closure under union - [ ] depends on: #15895 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability merge-conflict blocked-by-other-PR 448/4 Mathlib/Computability/ContextFreeGrammar.lean 1 50 ['Rida-Hamadani', 'YaelDillies', 'github-actions', 'leanprover-community-mathlib4-bot', 'madvorak'] nobody 1
335-61584
11 months ago
335-61584
11 months ago
72-28392
72 days
29610 llllvvuu
author:llllvvuu
feat(LinearAlgebra): define LinearMap.Eigenbasis Some theorems are left TODO for follow-up work. The definition is from @eric-wieser ([#Is there code for X? > diagonalizable linear maps @ 💬](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/diagonalizable.20linear.20maps/near/539163222)). Co-authored-by: Aristotle Harmonic --- - [x] depends on: #29420 (golfs some `[Nontrivial R]` assumptions) - [ ] depends on: #29791 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR
label:t-algebra$
458/5 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Spectrum.lean,Mathlib/LinearAlgebra/Eigenbasis.lean,Mathlib/LinearAlgebra/FreeModule/PID.lean,Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/Order/CompleteLattice/Basic.lean 6 29 ['github-actions', 'kckennylau', 'llllvvuu', 'mathlib4-dependent-issues-bot'] nobody 1
8-37101
8 days ago
15-4966
15 days ago
3-22329
3 days

All open PRs

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
14444 digama0
author:digama0
fix(GeneralizeProofs): unreachable! bug As [reported on Zulip](https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/Unreachable.20code.20reached.20in.20Lean.204.2E8.2E0/near/449286780). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author 1/1 Mathlib/Tactic/GeneralizeProofs.lean 1 4 ['github-actions', 'jcommelin', 'kmill'] nobody
429-68432
1 year ago
445-19602
1 year ago
10-36842
10 days
14345 digama0
author:digama0
feat: the Dialectica category is monoidal closed - [x] depends on: #14274 The monoidal closed structure of the Dialectica category. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 252/0 Mathlib.lean,Mathlib/CategoryTheory/Dialectica/Closed.lean 2 3 ['github-actions', 'kim-em', 'leanprover-community-mathlib4-bot'] nobody
429-68432
1 year ago
445-36436
1 year ago
12-17890
12 days
12952 adomani
author:adomani
test: length statistics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) test-ci WIP 124/0 .github/workflows/mathlib_stats.yml,.github/workflows/ml_stats_label.yaml,scripts/mathlib_stats.sh 3 9 ['github-actions'] nobody
429-68431
1 year ago
458-41111
1 year ago
0-0
0 seconds
12984 adomani
author:adomani
Adomani/periodic reports dev custom action --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) test-ci WIP 366/0 .github/workflows/mathlib_stats.yml,.github/workflows/ml_stats_label.yaml,scripts/count_decls.lean,scripts/mathlib_stats.sh 4 n/a ['github-actions'] nobody
429-68430
1 year ago
unknown
unknown
12452 JADekker
author:JADekker
feat(Cocardinal) : add some more api Just a small PR to add a bit more API for cocardinal filters. Not everything seems to generalise nicely from cofinite, so I didn't include such results. Currently the file has one `sorry`, I'm not sure how to complete this proof. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-CI 75/0 Mathlib/Order/Filter/Cocardinal.lean 1 0 [] nobody
429-68430
1 year ago
451-49130
1 year ago
0-0
0 seconds
11991 adomani
author:adomani
draft: syntax data linter A linter that prints `SyntaxNodeKind`s and `Range`s for all the nodes of a command. See this [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/217875-Is-there-code-for-X.3F/topic/undocumented.20things). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP 152/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/SyntaxDataLinter.lean 3 0 [] nobody
429-68429
1 year ago
458-41104
1 year ago
0-0
0 seconds
10998 hmonroe
author:hmonroe
feat(Logic): Arithmetization of partial recursive functions (toward Gödel's first incompleteness theorem) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic awaiting-author 364/0 Mathlib.lean,Mathlib/Logic/Godel/PartArith.lean 2 3 ['Ruben-VandeVelde', 'YaelDillies'] nobody
429-68428
1 year ago
484-39664
1 year ago
97-20483
97 days
10099 mcdoll
author:mcdoll
feat: Integration by parts for higher dimensional spaces --- - [x] depends on: #9987 - [x] depends on: #10105 - [x] depends on: #10107 - [x] depends on: #10115 - [x] depends on: #10118 - [x] depends on: #10182 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability t-analysis WIP 429/0 Mathlib/Analysis/InnerProductSpace/OrthoDecomp.lean,Mathlib/MeasureTheory/Integral/test2.lean 2 3 ['alexjbest', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
429-68428
1 year ago
603-12445
1 year ago
0-0
0 seconds
9469 dupuisf
author:dupuisf
feat: maximum modulus principle for functions vanishing at infinity This PR adds versions of the maximum modulus principle for functions vanishing at infinity that parallel those we already had for functions over a bounded set. These will have applications in e.g. norm interpolation. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 71/0 Mathlib/Analysis/Complex/AbsMax.lean 1 8 ['dupuisf', 'j-loreaux'] nobody
429-68427
1 year ago
624-23273
1 year ago
12-86009
12 days
9352 chenyili0818
author:chenyili0818
feat: arithmetic lemmas for `gradient` This file is based on Mathlib.Analysis.Calculus.Gradient.Basic, and describes the calculation properties Co-authored-by: Ziyu Wang [tropicalfish910@gmail.com](mailto:tropicalfish910@gmail.com) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 404/0 Mathlib.lean,Mathlib/Analysis/Calculus/Gradient/Lemmas.lean 2 30 ['chenyili0818', 'github-actions', 'jcommelin', 'sgouezel', 'winstonyin'] nobody
429-68427
1 year ago
591-49592
1 year ago
51-80670
51 days
9510 eric-wieser
author:eric-wieser
feat(Analysis/Calculus/DualNumber): Extending differentiable functions to dual numbers This shows that this operation preserves multiplication and composition --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-analysis awaiting-CI WIP
label:t-algebra$
119/0 Mathlib/Analysis/Calculus/DualNumber.lean 1 4 ['github-actions'] nobody
429-68427
1 year ago
635-56458
1 year ago
0-0
0 seconds
6859 MohanadAhmed
author:MohanadAhmed
TryLean4Bundle: Windows Bundle Creator # `TryLean4Bundle`: Windows Bundle Creator A Windows batch script and a CI yml file that create an self extracting archive. The user should 1. just download the archive, 2. double click the archive to expand 3. double click the `RunLean.bat` script in the expanded archive. The script currently downloads 7 dependencies into CI then unpacks them in the appropriate locations and finally packs them back. To try a bundle created using these scripts but from a different repo see (https://github.com/MohanadAhmed/TryLean4Bundle/releases) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI WIP help-wanted 114/0 .github/workflows/mk_windows_bundle.yml,scripts/windowsBundle.bat 2 0 [] nobody
429-68426
1 year ago
766-11297
2 years ago
0-0
0 seconds
8224 Kha
author:Kha
chore: add `lean4checker` benchmark WIP 16/0 scripts/bench/temci-config.run.yml 1 3 ['Kha', 'grunweg', 'kim-em', 'leanprover-bot'] nobody
429-68426
1 year ago
497-34955
1 year ago
0-0
0 seconds
7890 grhkm21
author:grhkm21
feat(Mathlib/Tactic/Setm): implement setm tactic This is my first time doing metaprogramming in Lean 4, please provide feedback when you have them :) The `setm` tactic, which stands for `set` + matching, matches a given expression with the goal and introduces new local hypotheses for the named holes specified. One of the best usage is for rearrangement proofs. As a simple example, ```lean example : (1 + 1) + (4 * 3) - (1 + 1) = (3 * 4 : Rat) := by setm ?A + ?B - ?A = (?C : Rat) rw [show ∀ A B, A + B - A = B by intro A B ; ring_nf ] apply Rat.mul_comm ``` One can imagine replacing the three term expression with a 7 term algebraic expression. This was developed with tons of help from [Zulip](https://leanprover.zulipchat.com/#narrow/stream/239415-metaprogramming-.2F-tactics/topic/Help.20with.20writing.20tactic), especially from Thomas. Thanks! TODO: - [X] Support `setm ... at ...` syntax, see *example 1* below - [X] Write docs - [ ] Use `withNewMCtxDepth` - [X] Rename the intermediate `MVar`s, see *example 2* below - [ ] Use `elabTermWithHolesPostponing` in conjunction with `Term.synthesizeSyntheticMVarsNoPostPoning` after `isDefEq` to handle instances Example 1: ```lean /- Usage with `using` and `at` keywords -/ example (h1 : 1 + 1 = 3) (h2 : 1 + 3 = 5) (h3 : 2 + 2 = 5) : true := by setm ?A + _ = (?B : Nat) using h2 at h1 h2 h3 guard_hyp A := 1 guard_hyp B := 5 guard_hyp h1 : A + A = 3 guard_hyp h2 : A + 3 = B guard_hyp h3 : 2 + 2 = B trivial ``` Example 2: ```lean /- Test reusing named holes -/ example (h : b + a = c) : a + b = c := by /- setm 1-/ setm ?A + ?B = (_ : Nat) guard_hyp A := a guard_hyp B := b /- clean up -/ unfold_let A B clear hA hB A B /- setm 2 -/ rewrite [Nat.add_comm] setm ?A + ?B = (_ : Nat) at h ⊢ guard_hyp A := b guard_hyp B := a exact h ``` Co-authored-by: Jireh Loreaux [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 141/0 Mathlib.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/Setm.lean,test/Setm.lean 4 3 ['thorimur'] nobody
429-68426
1 year ago
710-69950
1 year ago
0-0
0 seconds
5745 alexjbest
author:alexjbest
feat: a tactic to consume type annotations, and make constructor nicer During the copenhagen masterclass I found some situations where applying the constructor tactic left the goal in a difficult to read state when autoParams were present. We add a simple tactic to clean these up, and a macro for `constructor` to behave more like the constructor notation and do this automatically (constructor is in core) It seems that these things should be cleaned up by simp, but a simp lemma to remove these annotations is not accepted by lean as the types are too similar. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author 41/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Consume.lean,test/consume.lean 4 4 ['alexjbest', 'digama0', 'kim-em', 'kmill'] nobody
429-68425
1 year ago
514-31919
1 year ago
51-33797
51 days
4786 thorimur
author:thorimur
feat: AppBuilder utils This supplements `Lean.Meta.AppBuilder`, introducing variants of `mkAppN` and `mkAppM` which allow for more fine-grained management of existing and created metavariables. [Description pending] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 205/0 Mathlib.lean,Mathlib/Lean/Meta/AppBuilder.lean 2 0 [] nobody
429-68425
1 year ago
849-68779
2 years ago
0-0
0 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. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory awaiting-author 112/0 Mathlib.lean,Mathlib/CategoryTheory/Sites/CoveringFamilies.lean 2 20 ['AnthonyBordg', 'adamtopaz', 'dagurtomas', 'github-actions', 'joelriou'] nobody
424-43442
1 year ago
429-37107
1 year ago
1-48443
1 day
15453 tomaz1502
author:tomaz1502
Track formalization of runtime complexity I finished porting https://github.com/leanprover-community/mathlib3/pull/14494/ to Lean 4 and made several small PRs, as suggested. This meta PR is used to track the progress of the smaller PRs. ## Pending PRs - [Formalization of List.insertionSort](https://github.com/leanprover-community/mathlib4/pull/15449) - [Lemmas about Split](https://github.com/leanprover-community/mathlib4/pull/15450) - [Formalization of List.merge](https://github.com/leanprover-community/mathlib4/pull/15451) - [Formalization of List.mergeSort](https://github.com/leanprover-community/mathlib4/pull/15452) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 525/0 Mathlib.lean,Mathlib/Computability/Timed/InsertionSort.lean,Mathlib/Computability/Timed/Merge.lean,Mathlib/Computability/Timed/MergeSort.lean,Mathlib/Computability/Timed/Split.lean 5 4 ['joneugster', 'mergify'] nobody
415-62710
1 year ago
415-62764
1 year ago
0-0
0 seconds
14563 awueth
author:awueth
feat: if-then-else of exclusive or statement --- If `¬(P ∧ Q)` then `ite (P ∨ Q) a 1 = (ite P a 1) * (ite Q a 1)` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra awaiting-author
label:t-algebra$
5/0 Mathlib/Algebra/Group/Basic.lean 1 3 ['eric-wieser', 'github-actions', 'kim-em'] nobody
414-60818
1 year ago
414-60818
1 year ago
6-38745
6 days
10387 adomani
author:adomani
feat(Tactic/ComputeDegree): add `polynomial` tactic Introducing the `polynomial` tactic, summing up `compute_degree, monicity` and adding support for `leadingCoeff`. This is more of a proof of concept: if there is interest in this tactic, I can polish it up. See [this Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/113489-new-members/topic/Compute.20roots.20of.20polynomials/near/420713624). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) RFC t-meta WIP 24/0 Mathlib/Tactic/ComputeDegree.lean 1 0 [] nobody
414-57966
1 year ago
414-57966
1 year ago
0-0
0 seconds
9693 madvorak
author:madvorak
feat: Linear programming in the standard form --- Zulip discussion: https://leanprover.zulipchat.com/#narrow/stream/144837-PR-reviews/topic/.237386.20Linear.20Programming Four PRs incompatible with each other: https://github.com/leanprover-community/mathlib4/pull/7386 (list of constraints) https://github.com/leanprover-community/mathlib4/pull/9693 (matrix form) https://github.com/leanprover-community/mathlib4/pull/10026 (Antoine Chambert-Loir's def; semirings, linear) https://github.com/leanprover-community/mathlib4/pull/10159 (Antoine Chambert-Loir's def; rings, affine) - [x] depends on: #9652 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra RFC WIP
label:t-algebra$
86/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/LinearProgramming.lean 2 14 ['apurvanakade', 'github-actions', 'leanprover-community-mathlib4-bot', 'madvorak'] nobody
414-57881
1 year ago
414-57881
1 year ago
0-0
0 seconds
7386 madvorak
author:madvorak
feat: Define linear programs Linear programs over a general `Module` with constraints given in the form "aᵀx - b ≥ 0" and the objective function as an `AffineMap` to be minimized. --- Zulip discussion: https://leanprover.zulipchat.com/#narrow/stream/144837-PR-reviews/topic/.237386.20Linear.20Programming Four PRs incompatible with each other: https://github.com/leanprover-community/mathlib4/pull/7386 (list of constraints) https://github.com/leanprover-community/mathlib4/pull/9693 (matrix form) https://github.com/leanprover-community/mathlib4/pull/10026 (Antoine Chambert-Loir's def; semirings, linear) https://github.com/leanprover-community/mathlib4/pull/10159 (Antoine Chambert-Loir's def; rings, affine) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra RFC WIP
label:t-algebra$
87/0 Mathlib.lean,Mathlib/LinearAlgebra/LinearProgramming.lean 2 63 ['Shreyas4991', 'YaelDillies', 'eric-wieser', 'github-actions', 'kim-em', 'madvorak'] nobody
414-57491
1 year ago
414-57491
1 year ago
66-6720
66 days
7219 Ruben-VandeVelde
author:Ruben-VandeVelde
feat: Equivs for AddMonoidAlgebras --- Extracted from #6718. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
113/0 Mathlib.lean,Mathlib/Algebra/MonoidAlgebra/Equiv.lean 2 12 ['Ruben-VandeVelde', 'alreadydone', 'eric-wieser'] eric-wieser
assignee:eric-wieser
414-57453
1 year ago
414-57454
1 year ago
0-0
0 seconds
13163 erdOne
author:erdOne
feat(.vscode/module-docstring.code-snippet): Prevent auto-complete from firing on `do` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author 5/0 .vscode/module-docstring.code-snippets 1 5 ['erdOne', 'grunweg', 'robertylewis', 'trivial1711'] nobody
414-56280
1 year ago
414-56280
1 year ago
50-50444
50 days
10026 madvorak
author:madvorak
Linear programming according to Antoine Chambert-Loir's book --- Zulip discussion: https://leanprover.zulipchat.com/#narrow/stream/144837-PR-reviews/topic/.237386.20Linear.20Programming Four PRs incompatible with each other: https://github.com/leanprover-community/mathlib4/pull/7386 (list of constraints) https://github.com/leanprover-community/mathlib4/pull/9693 (matrix form) https://github.com/leanprover-community/mathlib4/pull/10026 (Antoine Chambert-Loir's def; semirings, linear) https://github.com/leanprover-community/mathlib4/pull/10159 (Antoine Chambert-Loir's def; rings, affine) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra RFC WIP
label:t-algebra$
86/0 Mathlib.lean,Mathlib/LinearAlgebra/LinearProgramming.lean 2 9 ['eric-wieser', 'madvorak', 'riccardobrasca'] nobody
413-35344
1 year ago
413-35344
1 year ago
0-0
0 seconds
10159 madvorak
author:madvorak
Linear programming according to Antoine Chambert-Loir's book — affine version --- Zulip discussion: https://leanprover.zulipchat.com/#narrow/stream/144837-PR-reviews/topic/.237386.20Linear.20Programming Four PRs incompatible with each other: https://github.com/leanprover-community/mathlib4/pull/7386 (list of constraints) https://github.com/leanprover-community/mathlib4/pull/9693 (matrix form) https://github.com/leanprover-community/mathlib4/pull/10026 (Antoine Chambert-Loir's def; semirings, linear) https://github.com/leanprover-community/mathlib4/pull/10159 (Antoine Chambert-Loir's def; rings, affine) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra RFC WIP
label:t-algebra$
83/0 Mathlib.lean,Mathlib/LinearAlgebra/LinearProgramming.lean 2 7 ['eric-wieser', 'madvorak', 'riccardobrasca'] nobody
413-35330
1 year ago
413-35330
1 year ago
0-0
0 seconds
11890 adomani
author:adomani
feat: the terminal refine linter A linter that warns on usages of `refine` and `refine'` as a finishing tactic. See this [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Usage.20of.20refine'). ### Conclusion of the experiment Systematic replacements of terminal `refine` with `exact` leads to an overall slow-down. --- - [ ] depends on: #15616 (disable the linter in downstream projects) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter awaiting-author 77/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/TerminalRefineLinter.lean 3 14 ['adomani', 'github-actions', 'grunweg', 'joneugster', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
410-68911
1 year ago
410-68913
1 year ago
18-13508
18 days
11090 pangelinos
author:pangelinos
feat: define spectral spaces and prove that a quasi-compact open of a spectral space is spectral Define spectral spaces and prove that a quasi-compact open of a spectral space is spectral. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology please-adopt good first issue 69/0 Topology/Spectral/basic.lean 1 15 ['YaelDillies', 'adomani', 'j-loreaux', 'jcommelin', 'kim-em', 'pangelinos'] nobody
410-45070
1 year ago
414-57996
1 year ago
16-44803
16 days
9795 sinhp
author:sinhp
feat: the type `Fib` of fibre of a function at a point This is the most basic file of the theory of fibred categories developed here: https://github.com/sinhp/LeanFibredCategories/tree/master --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 74/0 Mathlib.lean,Mathlib/Data/Fiber.lean 2 17 ['adri326', 'joelriou', 'sinhp'] nobody
408-47846
1 year ago
623-67313
1 year ago
1-32924
1 day
15055 sinhp
author:sinhp
feat: the category of pointed objects of a concrete category This file defines the category of pointed objects of a concrete category. After this we will have the categories of pointed groups, pointed abelian groups, pointed groupoids, etc. To define `Pointed.functor`, we need to add the following "pullback" construction to the category of elements. ``` @[simps obj map] def pullback (F : D ⥤ Type w) (G : C ⥤ D) : (G ⋙ F).Elements ⥤ F.Elements where obj X := ⟨G.obj X.1, X.2⟩ map {X Y} f := ⟨G.map f.1, f.2⟩ ``` This is called pullback since the display map of `G ⋙ F` (i.e. `π (G ⋙ F)`) is a pullback of the display map of `F`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 185/0 Mathlib.lean,Mathlib/CategoryTheory/ConcreteCategory/Pointed.lean,Mathlib/CategoryTheory/Elements.lean 3 13 ['dagurtomas', 'github-actions', 'kim-em'] nobody
407-55563
1 year ago
429-56219
1 year ago
7-80557
7 days
16253 Shreyas4991
author:Shreyas4991
feat: Basics of Discrete Fair Division in Mathlib This PR adds the basics of discrete fair division in mathlib. We include the definitions of allocations, valuations, properties of valuations, and the following notions : Envy-Freeness (EF), Envy-Freeness upto 1 good (EF1), and envy freeness upto any good (EFX). We also include the various implications between these notions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author WIP 144/0 Mathlib/GameTheory/FairDivision/Discrete/Basic.lean 1 9 ['Shreyas4991', 'eric-wieser', 'github-actions'] nobody
400-27612
1 year ago
400-27612
1 year ago
0-20853
5 hours
14669 Command-Master
author:Command-Master
feat(Data/Nat/PartENat): add lemmas for PartENat Add some missing lemmas for `PartENat`, as well as the additive homomorphism from it to `WithTop Int`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor awaiting-author 90/0 Mathlib/Data/Nat/PartENat.lean 1 3 ['erdOne', 'github-actions', 'urkud'] nobody
397-57617
1 year ago
397-57617
1 year ago
0-0
0 seconds
15121 Eloitor
author:Eloitor
feat: iff theorems for IsSplitEpi and IsSplitMono in opposite category --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory awaiting-author 40/0 Mathlib/CategoryTheory/EpiMono.lean 1 3 ['github-actions', 'joelriou', 'mattrobball'] nobody
397-20562
1 year ago
428-66221
1 year ago
7-3203
7 days
15895 madvorak
author:madvorak
feat(Computability/ContextFreeGrammar): mapping between two types of nonterminal symbols --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability WIP 172/0 Mathlib/Computability/ContextFreeGrammar.lean 1 43 ['YaelDillies', 'github-actions', 'madvorak'] nobody
396-37355
1 year ago
400-70864
1 year ago
1-43047
1 day
16570 yuma-mizuno
author:yuma-mizuno
chore(Tactic/CategoryTheory): change `TermElabM` to `MetaM` Separated from #15335. To use `Qq`, we need to modify `Qq` to support universe matching. See [Zulip](https://leanprover.zulipchat.com/#narrow/stream/144837-PR-reviews/topic/.2315335.20meta.20code.20for.20monoidal.20categories). --- - [ ] depends on: #15335 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta WIP 26/15 Mathlib/Tactic/CategoryTheory/BicategoryCoherence.lean,Mathlib/Tactic/CategoryTheory/Coherence.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mergify'] nobody
389-44221
1 year ago
390-3069
1 year ago
0-0
0 seconds
10591 adri326
author:adri326
feat(Topology/Algebra/ConstMulAction): properties of continuous actions in Hausdorff spaces Defines some useful properties of `ContinuousConstSMul` group actions on Hausdorff spaces: - `MulAction.isClosed_fixedBy`, which proves that the `fixedBy α m` set is closed - `t2_separation_smul`, which constructs an open set `s` such that `s` and `g • s` are disjoint - `Set.InjOn.t2_separation_smul`, the extension of `t2_separation_smul` to a set of group elements whose action is injective --- This PR belongs my series of PR around the formalization of Rubin's theorem. `MulAction.isClosed_fixedBy` is used in several places along the proof, and the separation lemmas are primarily used in showing that `(fixedBy α g)ᶜ` and `(fixedBy α h)ᶜ` are disjoint under some intricate but fully group-theoretic condition. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology awaiting-author
label:t-algebra$
57/0 Mathlib/Topology/Algebra/ConstMulAction.lean 1 9 ['ADedecker', 'adri326', 'j-loreaux', 'jcommelin'] ADedecker
assignee:ADedecker
388-36213
1 year ago
540-48951
1 year ago
55-82183
55 days
14704 Command-Master
author:Command-Master
feat(FieldTheory): define typeclass for simple extensions, and prove some properties Define `SimpleExtension F K`, which says that `K` is a simple field extension of `F`, and show that together with transcendentality it implies `IsFractionRing F[X] K`. --- - [x] depends on: #14710 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra awaiting-author WIP
label:t-algebra$
120/0 Mathlib.lean,Mathlib/FieldTheory/SimpleExtension.lean 2 17 ['Command-Master', 'acmepjz', 'github-actions', 'leanprover-community-mathlib4-bot', 'tb65536'] nobody
383-63663
1 year ago
383-63663
1 year ago
0-0
0 seconds
16773 arulandu
author:arulandu
feat(Probability/Distributions): formalize Beta distribution Formalize Beta distribution, using Gamma distribution as a reference. Added real-valued beta wrapper, in the manner of gamma. Thanks to @EtienneC30 for help with casting real <-> complex. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability awaiting-author 286/1 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Beta.lean,Mathlib/Probability/Distributions/Beta.lean 3 48 ['EtienneC30', 'arulandu', 'github-actions', 'vihdzp'] arulandu
assignee:arulandu
378-67179
1 year ago
383-63897
1 year ago
1-21124
1 day
10796 mcdoll
author:mcdoll
feat(Tactic/Positivity): non-negativity of functions --- This makes the `Finset.sum` and `integral_nonneg` extensions even more useful. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta WIP 27/0 Mathlib/Tactic/Positivity/Core.lean 1 1 ['YaelDillies'] nobody
348-67594
11 months ago
590-59663
1 year ago
0-0
0 seconds
14603 awueth
author:awueth
feat: degree is invariant under graph isomorphism --- Mathlib has the definition `SimpleGraph.Iso.mapNeighborSet` which is an equivalence between neighbor sets induced by an isomorphism. Would it be beneficial to add the same equivalence for `neighborFinset`? [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics WIP 24/0 Mathlib/Combinatorics/SimpleGraph/Map/Finite.lean 1 11 ['awueth', 'github-actions', 'jcommelin', 'kim-em', 'urkud'] nobody
346-39564
11 months ago
346-39564
11 months ago
31-44440
31 days
18630 tomaz1502
author:tomaz1502
feat(Computability.Timed): Formalization of runtime complexity of List.mergeSort This PR adds the formalization of the runtime complexity of the merge sort algorithm, defined in `Data/List/Sort`. Requires: https://github.com/leanprover-community/mathlib4/pull/15451 References: - Previous PR on mathlib3: https://github.com/leanprover-community/mathlib3/pull/14494/ - First discussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/BSc.20Final.20Project/near/220647062 - Second disussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Formalization.20of.20Runtime.20Complexity.20of.20Sorting.20Algorithms/near/284184450 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor 526/0 Mathlib.lean,Mathlib/Computability/Timed/InsertionSort.lean,Mathlib/Computability/Timed/Merge.lean,Mathlib/Computability/Timed/MergeSort.lean,Mathlib/Computability/Timed/Split.lean 5 8 ['github-actions'] nobody
332-36123
10 months ago
332-36123
10 months ago
0-0
0 seconds
19329 adomani
author:adomani
perf(CI): automatically benchmark PRs when they are opened This action posts the comment ``` !bench This is an automated bench-marking that runs when a PR is opened. No need to repeat. ``` whenever a PR is *opened*. It then ignores any subsequent changes to the PR. The automatic benching should help in catching PRs that unknowingly introduce a high performance cost, as was the case for my PR #18033. ### Note. Running `!bench` strains the benchmarking system and it is not feasible to run it on every push. However, Sebastian, in private communication with Johan, approved of automatically benching every PR once, when it is opened. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI WIP 25/0 .github/workflows/first_bench_is_free.yml 1 12 ['Ruben-VandeVelde', 'adomani', 'alreadydone', 'eric-wieser', 'github-actions', 'grunweg', 'jcommelin'] nobody
314-71617
10 months ago
316-60572
10 months ago
0-1356
22 minutes
19721 urkud
author:urkud
feat (WIP): formalize Moreira's version of Sard's theorem --- I'm in the process of migrating development to https://github.com/urkud/SardMoreira [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 427/1 Mathlib.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/Moreira2001.lean 5 1 ['github-actions'] nobody
288-10297
9 months ago
293-7112
9 months ago
0-0
0 seconds
18236 joelriou
author:joelriou
feat(Algebra/Category/ModuleCat/Presheaf): the endofunctor of presheaves of modules induced by an oplax natural transformation An endomorphism of ` ModuleCat.restrictScalarsPseudofunctor`, i.e. a "compatible" family of functors `ModuleCat A ⥤ ModuleCat A` for all (commutative) rings `A` induces a functor `PresheafOfModules R ⥤ PresheafOfModules R` for any presheaf of (commutative) rings `R`. In #18262, this is applied to the construction of exterior powers of a presheaves of modules. --- - [x] depends on: #18197 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-category-theory WIP
label:t-algebra$
180/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/FunctorOfNatTrans.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
287-32748
9 months ago
287-32786
9 months ago
0-0
0 seconds
20459 Ruben-VandeVelde
author:Ruben-VandeVelde
chore: fix names of roots_C_mul_X_{add,sub}_C_of_IsUnit --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
11/5 Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/Algebra/Polynomial/Roots.lean 2 2 ['eric-wieser', 'github-actions'] nobody
268-37650
8 months ago
268-37650
8 months ago
4-64422
4 days
10977 grunweg
author:grunweg
feat: germs of smooth functions Define the space of germs of smooth functions (between manifolds). Endow it with a ring structure if the target manifold is a smooth ring (e.g., a Lie group or a field). From the sphere eversion project, rewritten by me. Co-authored-by: Patrick Massot ------- Particular questions for review - is the authorship/copyright information appropriate? (`PatrickMassot` created the file `SmoothGerm` which I adapted; I didn't trace this far back through sphere-eversion.) - is providing all the intermediate algebraic structures (such as, an additive subgroup) on the space of smooth germs useful in practice? (The sphere eversion project only needs a ring structure.) - any further particular API lemmas (e.g., around coercions) which would be good to add? --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis t-topology t-differential-geometry awaiting-author 150/0 Mathlib.lean,Mathlib/Geometry/Manifold/Algebra/SmoothGerm.lean 2 33 ['YaelDillies', 'github-actions', 'grunweg', 'jcommelin', 'kim-em', 'mcdoll'] fpvandoorn
assignee:fpvandoorn
268-25407
8 months ago
402-46772
1 year ago
144-63944
144 days
19378 adamtopaz
author:adamtopaz
feat: Explanation widgets This adds some simple widgets, wrapped in a tactic, term and command elaborator, for displaying markdown explanations in the infoview. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author 101/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Widget/Explain.lean 3 8 ['adamtopaz', 'eric-wieser', 'github-actions', 'joneugster', 'kmill'] nobody
265-41685
8 months ago
265-41685
8 months ago
49-80804
49 days
19323 madvorak
author:madvorak
feat: Function to Sum decomposition --- Discussion: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Function.20to.20Sum.20decomposition t-data WIP 50/0 Mathlib.lean,Mathlib/Data/Sum/Decompose.lean 2 2 ['github-actions', 'madvorak'] nobody
263-48347
8 months ago
273-50945
9 months ago
43-18005
43 days
18461 hannahfechtner
author:hannahfechtner
feat: left and right common multiples mixins add mixins for left and right common multiples. These carry the data of what factors are used to create the common multiples --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra awaiting-author
label:t-algebra$
78/0 Mathlib/Algebra/Group/Defs.lean 1 13 ['github-actions', 'hannahfechtner', 'jcommelin', 'kbuzzard', 'kim-em', 'trivial1711'] nobody
256-64099
8 months ago
256-64099
8 months ago
69-35596
69 days
20797 vbeffara
author:vbeffara
feat(Topology/Covering): CM version of eq_of_comp_eq Add equivalents of the lemmas `IsCoveringMap.eq_of_comp_eq` and `IsCoveringMap.const_of_comp_CM` for the case of bundled `ContinuousMap` parameters. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology easy awaiting-author 9/1 Mathlib/Topology/Covering.lean 1 4 ['github-actions', 'ocfnash', 'vbeffara'] nobody
256-50864
8 months ago
257-51817
8 months ago
2-77310
2 days
17589 joelriou
author:joelriou
feat(Algebra/ModuleCat/Presheaf): composition of pushforwards and pullbacks and compatibilites The composition of two pullback functors on presheaves of modules `pullback φ ⋙ pullback ψ` identifies to the pullback of the composition. We show compatibilites for these isomorphisms: they are deduced from similar identifies for pushforward (in which case they are `rfl`). --- - [x] depends on: #17366 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry t-category-theory WIP 166/2 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pullback.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pushforward.lean 4 4 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
253-31530
8 months ago
253-31549
8 months ago
0-0
0 seconds
21009 vihdzp
author:vihdzp
feat(Logic/Relation): more `TransGen` lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic t-order awaiting-author 13/0 Mathlib/Logic/Relation.lean 1 2 ['b-mehta', 'github-actions'] nobody
252-46502
8 months ago
252-46502
8 months ago
0-39342
10 hours
15443 YaelDillies
author:YaelDillies
feat: The Marcinkiewicz-Zygmund inequality Prove the Marcinkiewicz-Zygmund inequality. The Marcinkiewicz-Zygmund inequality states that, if `X₁, ... Xₐ ∈ L^p` are independent random variables of mean zero valued in some inner product space, then the `L^p`-norm of `X₁ + ... + Xₐ` is at most `Cₚ` times the `L^(p/2)`-norm of `|X₁|² + ... + |Xₐ|²`, where `Cₚ` is a constant depending on `p` alone. From LeanAPAP Co-authored-by: Bhavik Mehta --- - [x] depends on: #15832 - [x] depends on: #21033 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis WIP 189/0 Mathlib.lean,Mathlib/Probability/MarcinkiewiczZygmund.lean 2 39 ['Parcly-Taxel', 'YaelDillies', 'b-mehta', 'github-actions', 'hrmacbeth', 'mathlib4-dependent-issues-bot', 'sgouezel'] nobody
251-64844
8 months ago
251-69908
8 months ago
89-28229
89 days
20466 MohanadAhmed
author:MohanadAhmed
feat: Sherman Morrison formula for rank 1 update of the matrix inverse Provides the Sherman Morrison rank 1 update of the matrix inverse https://en.wikipedia.org/wiki/Sherman%E2%80%93Morrison_formula. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-author 37/0 Mathlib/Data/Matrix/Invertible.lean 1 4 ['eric-wieser', 'github-actions'] nobody
249-44367
8 months ago
249-44367
8 months ago
23-30991
23 days
18749 GabinKolly
author:GabinKolly
feat(ModelTheory): preparatory work for the existence of Fraïsse limits Define the map of a PartialEquiv through an embedding, and related properties. Define embeddings and equivalences between equal structures or equal substructures, and related properties. Add miscellaneous lemmas which will be used to prove the existence of fraisse limits. --- This is preparation for #18876 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic awaiting-author 308/5 Mathlib/ModelTheory/Bundled.lean,Mathlib/ModelTheory/DirectLimit.lean,Mathlib/ModelTheory/FinitelyGenerated.lean,Mathlib/ModelTheory/PartialEquiv.lean,Mathlib/ModelTheory/Substructures.lean 5 9 ['GabinKolly', 'YaelDillies', 'github-actions', 'vihdzp'] nobody
246-20824
8 months ago
256-33278
8 months ago
73-63475
73 days
20649 GabinKolly
author:GabinKolly
feat(ModelTheory/Graph): prove characterization of the fraisse limit of finite simple graphs Prove that a countable graph with the extension property must be the Fraisse limit of finite simple graphs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-logic t-combinatorics WIP 175/0 Mathlib/ModelTheory/Graph.lean,Mathlib/ModelTheory/Substructures.lean 2 1 ['github-actions'] nobody
244-16683
8 months ago
266-14324
8 months ago
0-0
0 seconds
21384 alreadydone
author:alreadydone
experiment: make submodule quotient reducibly defeq to additive group quotient --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
1/1 Mathlib/LinearAlgebra/Quotient/Defs.lean 1 1 ['github-actions'] nobody
242-35266
8 months ago
242-35269
8 months ago
0-0
0 seconds
10660 eric-wieser
author:eric-wieser
feat(LinearAlgebra/CliffordAlgebra): construction from a basis This is adapted from https://github.com/eric-wieser/lftcm2023-clifford_algebra, which only worked for the special case of `Q = 0`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author WIP
label:t-algebra$
573/0 Mathlib.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Basis.lean 2 15 ['github-actions'] nobody
240-81304
7 months ago
240-81304
7 months ago
0-0
0 seconds
15355 adomani
author:adomani
feat: MiM PR report --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP 153/0 .github/workflows/monthly_pr_report.yaml,scripts/find_labels.sh 2 n/a ['YaelDillies', 'adomani', 'github-actions'] nobody
239-61226
7 months ago
unknown
unknown
21495 alreadydone
author:alreadydone
experiment: reducible HasQuotient.quotient' --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) bench-after-CI WIP 2/0 Mathlib/Algebra/Quotient.lean 1 1 ['github-actions'] nobody
239-55316
7 months ago
239-55316
7 months ago
0-200
3 minutes
21496 alreadydone
author:alreadydone
experiment: make SetLike.coe reducible --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) bench-after-CI t-data 1/1 Mathlib/Data/SetLike/Basic.lean 1 1 ['github-actions'] nobody
239-55085
7 months ago
239-55085
7 months ago
0-0
0 seconds
21447 erdOne
author:erdOne
feat(AlgebraicGeometry): the split algebraic torus --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry awaiting-author 419/0 Mathlib.lean,Mathlib/AlgebraicGeometry/Torus.lean 2 4 ['erdOne', 'github-actions', 'joelriou'] nobody
238-2090
7 months ago
238-20264
7 months ago
2-69252
2 days
22037 EtienneC30
author:EtienneC30
issues with Finset subtype coercion [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Finset.20subtype.20changes) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 7/1 Mathlib/Data/Finset/Defs.lean,Mathlib/MeasureTheory/Constructions/Projective.lean 2 1 ['github-actions'] nobody
227-60113
7 months ago
227-60165
7 months ago
0-0
0 seconds
13442 dignissimus
author:dignissimus
feat: mabel tactic for multiplicative abelian groups Mabel tactic for multiplicative abelian groups (#10361) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-meta modifies-tactic-syntax awaiting-author help-wanted 439/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MAbel.lean,MathlibTest/mabel.lean 4 10 ['BoltonBailey', 'dignissimus', 'github-actions', 'joneugster', 'kbuzzard'] joneugster
assignee:joneugster
226-16627
7 months ago
230-84623
7 months ago
0-16
16 seconds
21501 sksgurdldi
author:sksgurdldi
feat(List): add sum_zipWith_eq_finset_sum ### **Description:** This PR adds the lemma `List.sum_zipWith_eq_finset_sum` to `Mathlib.Algebra.BigOperators.Group.Finset.Basic`. #### **Statement:** The sum of the `zipWith` operation on two lists equals the sum of applying the operation to corresponding elements of the two lists, indexed over the minimum of their lengths. #### **Formal Statement:** ```lean lemma sum_zipWith_eq_finset_sum [Inhabited α] [Inhabited β] [AddCommMonoid γ] {op : α → β → γ} (l : List α) (m : List β) : (List.zipWith op l m).sum = ∑ x ∈ (Finset.range (Nat.min l.length m.length)), op (l[x]!) (m[x]!) ``` #### **Remarks:** - This lemma provides a useful equivalence between `List.zipWith` and summation over a `Finset.range` indexed by `Nat.min l.length m.length`. - It can be helpful in algebraic manipulations involving list-based summations. #### **Dependencies:** No additional dependencies. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra awaiting-author
label:t-algebra$
43/0 Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean 1 1 ['github-actions', 'j-loreaux'] nobody
226-15706
7 months ago
226-15706
7 months ago
13-33168
13 days
22194 eric-wieser
author:eric-wieser
feat: oracle computations (alternative) This explores a simpler version of #20924 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability 698/0 Archive/Examples/SumOracle.lean,Mathlib.lean,Mathlib/Computability/QueryComplexity/Defs.lean,Mathlib/Computability/QueryComplexity/Sort.lean 4 4 ['eric-wieser', 'girving', 'github-actions'] nobody
222-56963
7 months ago
223-11451
7 months ago
0-0
0 seconds
19062 hannahfechtner
author:hannahfechtner
feat(Algebra/PresentedMonoid/Basic) : facts about rel Add in a number of useful theorems (reflexivity, closure under multiplication) and lemmas about when the PresentedMonoid.rel holds as an API for users --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
38/0 Mathlib/GroupTheory/Congruence/Defs.lean 1 8 ['github-actions', 'hannahfechtner', 'kbuzzard', 'riccardobrasca'] nobody
220-53275
7 months ago
220-53275
7 months ago
87-64575
87 days
22302 CharredLee
author:CharredLee
feat: add `CategoryTheory.Topos.Power` This is a continuation of #21281 with the end goal of defining topoi in Mathlib. It introduces the notion of a power object in a category with a subobject classifier, which is a special case of an internal hom. The definition `HasPowerObjects C` contained in this PR is all that remains before `IsTopos C` can be defined. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory awaiting-author 312/0 Mathlib.lean,Mathlib/CategoryTheory/Topos/Power.lean 2 2 ['github-actions', 'joelriou'] b-mehta
assignee:b-mehta
220-16902
7 months ago
220-18029
7 months ago
0-1528
25 minutes
22416 JLimperg
author:JLimperg
chore: fix benchmark script for precompilation The benchmarking script used to fail when precompilation was enabled anywhere in the dependency graph. --- Fix courtesy of @Kha. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 2/0 scripts/bench/fake-root/lib/lean/libleanshared.so,scripts/bench/run 2 1 ['github-actions'] nobody
217-12957
7 months ago
217-13020
7 months ago
0-0
0 seconds
22389 adomani
author:adomani
feat: the variableVariable linter The motivation comes from [this Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/style.20proposal.3A.20avoid.20.60variable.20.7BX.7D.20.2E.2E.2E.20variable.20.28X.29.60). Summarising, updating a variable binder for a single declaration can be confusing. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-linter WIP 167/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/VariableVariable.lean,variableDeclarationVariable_replacements.py 5 1 ['github-actions'] nobody
215-40424
7 months ago
217-61580
7 months ago
0-0
0 seconds
22497 adomani
author:adomani
test: decl diff in lean Testing branch for #22464. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) test-ci CI WIP 161/0 .github/workflows/PR_summary_lean.yml,Mathlib.lean,Mathlib/Test.lean,scripts/README.md,scripts/declarations_diff.lean,scripts/declarations_diff_lean_shell_glue.sh 6 7 ['github-actions', 'mergify'] nobody
213-40002
6 months ago
214-51701
7 months ago
0-0
0 seconds
20636 eric-wieser
author:eric-wieser
feat: multiplication of intervals in rings --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
36/1 Mathlib/Algebra/Order/Interval/Basic.lean 1 16 ['Timeroot', 'YaelDillies', 'eric-wieser', 'github-actions'] nobody
213-28623
6 months ago
249-32400
8 months ago
17-17852
17 days
22648 adomani
author:adomani
test: lean implementation decl diff quandle --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 210/1 .github/workflows/PR_summary_lean.yml,Mathlib/Algebra/Quandle.lean,scripts/README.md,scripts/declarations_diff.lean,scripts/declarations_diff_lean_shell_glue.sh 5 4 ['adomani', 'eric-wieser', 'github-actions'] nobody
209-70782
6 months ago
211-40068
6 months ago
0-0
0 seconds
22784 grunweg
author:grunweg
feat: add Diffeomorph.sumSumSumComm This matches `{Equiv,Homeomorph.sumSumSumComm}`, and is needed to prove that addition in the cobordism group is commutatives. From my bordism theory project. --- - depends on #22783 (easy pre-requisites) The current proof is not complete yet, and feels very painful. I'm not yet sure what's the best way to write this. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry WIP 50/0 Mathlib/Geometry/Manifold/Diffeomorph.lean 1 1 ['github-actions'] nobody
207-24455
6 months ago
207-47199
6 months ago
0-0
0 seconds
22846 mattrobball
author:mattrobball
test t-analysis 2/0 Mathlib/Analysis/Normed/Module/Basic.lean 1 4 ['github-actions', 'leanprover-bot', 'mattrobball'] nobody
206-28963
6 months ago
206-30903
6 months ago
0-0
0 seconds
22159 shetzl
author:shetzl
feat: add definition of pushdown automata Add the definition of pushdown automata and their two acceptance conditions: acceptance based on empty stack and acceptance based on final state. Co-authored-by: Tobias Leichtfried --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor awaiting-author 70/0 Mathlib.lean,Mathlib/Computability/PDA.lean 2 34 ['YaelDillies', 'github-actions', 'madvorak', 'shetzl'] nobody
200-64449
6 months ago
200-64449
6 months ago
20-81771
20 days
23042 joneugster
author:joneugster
feat(CategoryTheory/Enriched/Limits): add HasConicalLimitsOfSize.shrink --- Note: I've marked this "WIP" because I'm not yet sure when this will be needed and I'd probably put the PR on the queue once I've created some follow-up needing it. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) infinity-cosmos t-category-theory WIP 22/1 Mathlib/CategoryTheory/Enriched/Limits/HasConicalLimits.lean 1 1 ['github-actions'] nobody
199-62561
6 months ago
199-62716
6 months ago
0-1
1 second
17587 kmill
author:kmill
feat: Sym2-as-Finset theory --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 105/3 Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Data/Sym/Sym2.lean,Mathlib/RingTheory/Polynomial/Vieta.lean 4 10 ['FordUniver', 'YaelDillies', 'github-actions', 'kmill'] nobody
198-74974
6 months ago
199-24054
6 months ago
0-0
0 seconds
16239 Rida-Hamadani
author:Rida-Hamadani
feat(Geometry/Manifold): orientable manifolds This module defines orientable manifolds. [This](https://leanprover.zulipchat.com/#narrow/stream/217875-Is-there-code-for-X.3F/topic/Orientable.20Surface) Zulip topic is related. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry awaiting-author 376/6 Mathlib.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Geometry/Manifold/Orientable.lean 3 39 ['Rida-Hamadani', 'github-actions', 'grunweg', 'ocfnash'] nobody
197-11221
6 months ago
216-49943
7 months ago
5-70530
5 days
23142 joneugster
author:joneugster
feat(CategoryTheory/Enriched/Limits): add API for HasConicalLimit --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) infinity-cosmos t-category-theory awaiting-author 52/9 Mathlib/CategoryTheory/Enriched/Limits/HasConicalLimits.lean 1 2 ['github-actions', 'joelriou'] nobody
196-65707
6 months ago
196-65707
6 months ago
0-68906
19 hours
23285 AntoineChambert-Loir
author:AntoineChambert-Loir
refactor: directed systems in terms of functors This is a WIP aiming to refactor the work on directed systems using the category theory library. But there are universes nightmares. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra t-category-theory WIP
label:t-algebra$
111/45 Mathlib/Order/DirectedInverseSystem.lean 1 1 ['github-actions'] nobody
193-16098
6 months ago
193-16104
6 months ago
0-24
24 seconds
21829 Whysoserioushah
author:Whysoserioushah
feat(LinearAlgebra/TensorProduct/HomTensor): Add TensorProduct of Hom-modules Co-authored-by: Andrew Yang --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
174/0 Mathlib.lean,Mathlib/LinearAlgebra/TensorProduct/HomTensor.lean 2 26 ['Whysoserioushah', 'YaelDillies', 'erdOne', 'github-actions', 'kbuzzard'] nobody
184-58721
6 months ago
185-65241
6 months ago
46-53384
46 days
22861 eric-wieser
author:eric-wieser
feat: add the trace of a bilinear form Following the steps at [#Is there code for X? > Laplacian @ 💬](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Laplacian/near/450834505). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) Some questions: * Does this generalize to multilinear maps? * Is there an `RCLike` generalization? * Does this generalize to `BilinMap` instead of just `BilinForm`? Perhaps the approach in [#mathlib4 > Stating Schrodinger's equation @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Stating.20Schrodinger's.20equation/near/500409890) of using `ContinuousLinearMap.adjoint'` is better. t-algebra awaiting-author
label:t-algebra$
100/0 Mathlib.lean,Mathlib/LinearAlgebra/BilinearForm/Trace.lean 2 3 ['github-actions', 'jcommelin'] nobody
182-48560
5 months ago
182-48560
5 months ago
23-44995
23 days
22888 plp127
author:plp127
perf: replace `Lean.Expr.swapBVars` with a better? implementation Replaces `Lean.Expr.swapBVars` with a version that traverses the expression. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author 14/12 Mathlib/Tactic/FunProp/ToBatteries.lean 1 23 ['eric-wieser', 'github-actions', 'joneugster', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'plp127'] eric-wieser and joneugster
assignee:eric-wieser assignee:joneugster
179-60806
5 months ago
180-47105
5 months ago
4-80306
4 days
23772 SEU-Prime
author:SEU-Prime
Create Amice.lean i built amice equiv [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory WIP 283/0 Mathlib/NumberTheory/Padics/Amice.lean 1 2 ['grunweg'] nobody
179-47254
5 months ago
179-47254
5 months ago
0-8688
2 hours
21903 yhtq
author:yhtq
feat: add from/toList between `FreeSemigroup` and `List` with relative theorems Add from/toList between `FreeSemigroup` and `List` with relative theorems, as well as an incidental definition of lexicographic order on `FreeSemigroup`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-algebra awaiting-CI
label:t-algebra$
169/0 Mathlib/Algebra/Free.lean 1 11 ['YaelDillies', 'github-actions'] nobody
178-79775
5 months ago
178-79775
5 months ago
51-9403
51 days
22657 Xmask19
author:Xmask19
feat: a graph is maximally acyclic iff it is a tree --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 86/0 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 6 ['Rida-Hamadani', 'b-mehta', 'github-actions', 'grunweg'] b-mehta
assignee:b-mehta
178-45432
5 months ago
178-45453
5 months ago
200-36119
200 days
21342 YaelDillies
author:YaelDillies
refactor(Normed/Group/Quotient): generalise to non-abelian groups The goal is to apply this to the free group. --- - [x] depends on: #21341 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis WIP 25/12 Mathlib/Topology/Algebra/ConstMulAction.lean,Mathlib/Topology/Algebra/Group/Quotient.lean 2 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
175-71017
5 months ago
175-71036
5 months ago
0-352
5 minutes
24000 YaelDillies
author:YaelDillies
feat: correspondence between Hopf algebras and affine group schemes Construct `Spec` as a functor from `R`-Hopf algebras to group schemes over `Spec R`, show it is full and faithful and has affine group schemes as essential image. From Toric, FLT Co-authored-by: Andrew Yang Co-authored-by: Michał Mrugała Co-authored-by: Christian Merten --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) toric FLT t-algebraic-geometry WIP 127/0 Mathlib/AlgebraicGeometry/GroupScheme/HopfAffine.lean 1 3 ['YaelDillies', 'github-actions', 'kbuzzard'] nobody
173-16014
5 months ago
173-53966
5 months ago
0-1
1 second
21270 GabinKolly
author:GabinKolly
feat(ModelTheory/Bundled): first-order embeddings and equivalences from equalities Add first-order embeddings and equivalences from equalities between bundled structures. --- Add two definitions to get embeddings and equivalences from equalities between bundled structures, and simple properties. This is some preparatory work for #18876 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-logic awaiting-author 102/0 Mathlib/ModelTheory/Bundled.lean 1 26 ['GabinKolly', 'Vierkantor', 'YaelDillies', 'github-actions'] nobody
172-72387
5 months ago
172-72387
5 months ago
50-58472
50 days
24086 mattrobball
author:mattrobball
perf(Normed.Field.Basic): change parent order for `Semifield` and `Field` and reduce priority `toComm(Semi)Ring` Passing through the projection `toComm(Semi)Ring` should not be preferred. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
8/2 Mathlib/Algebra/Field/Defs.lean 1 4 ['github-actions', 'leanprover-bot', 'mattrobball'] nobody
171-39024
5 months ago
171-43824
5 months ago
0-0
0 seconds
13038 adomani
author:adomani
feat: Mathlib weekly reports This PR introduces a weekly cron job that computes a "global" report on the evolution of Mathlib in the previous week. It consists of * a CI workflow with a cron job that runs at minight on Sunday (`.github/workflows/mathlib_stats.yaml`); * a Lean file extracting a categorized list of "all" the declarations in Mathlib (`scripts/count_decls.lean`); * a bash file computing Git-diff-related information and collating the data from the Lean file (`scripts/mathlib_stats.sh`); * a convenience CI workflow that is triggered on adding the `test-ci` label and results in posting on the PR and on Zulip the report (`.github/workflows/mathlib_stats_label.yaml`). The second CI workflow is intended to be removed just before/right after the PR is ready to merge. [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/113488-general) [Thread for the reports](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Mathlib.20weekly.20change.20report) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI t-meta awaiting-author 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
171-19978
5 months ago
445-37858
1 year ago
57-4216
57 days
24129 urkud
author:urkud
feat: symmetry of Gateaux derivatives --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 190/1 Mathlib.lean,Mathlib/Analysis/Calculus/LineDeriv/Basic.lean,Mathlib/Analysis/Calculus/LineDeriv/Symmetric.lean 3 1 ['github-actions'] nobody
169-73605
5 months ago
169-73605
5 months ago
0-0
0 seconds
19613 madvorak
author:madvorak
refactor(Combinatorics/Optimization/ValuedCSP): make only valid `FractionalOperation` possible Originally `FractionalOperation` was any multiset (possible empty). Then `FractionalOperation.IsValid` said it was nonempty. Instead, I would like to make it nonempty by definition. As a result, empty/invalid fractional operation couldn't be declared at all. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 14/17 Mathlib/Combinatorics/Optimization/ValuedCSP.lean 1 1 ['github-actions'] nobody
169-23422
5 months ago
298-44995
9 months ago
308-32629
308 days
23600 mattrobball
author:mattrobball
perf(Quiver.Basic): make `IsThin` a `class` It seems problematic that `Quiver.IsThin` is an `abbrev` for (essentially) `Subsingleton`. We turn it in a one-field class. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) delegated 27/21 Mathlib/CategoryTheory/Bicategory/Coherence.lean,Mathlib/CategoryTheory/Category/Preorder.lean,Mathlib/CategoryTheory/Generator/Basic.lean,Mathlib/CategoryTheory/Groupoid/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/WidePullbacks.lean,Mathlib/CategoryTheory/Limits/SmallComplete.lean,Mathlib/CategoryTheory/Monoidal/Free/Coherence.lean,Mathlib/CategoryTheory/Skeletal.lean,Mathlib/CategoryTheory/Subobject/MonoOver.lean,Mathlib/CategoryTheory/Thin.lean,Mathlib/Combinatorics/Quiver/Basic.lean 11 16 ['b-mehta', 'github-actions', 'leanprover-bot', 'mathlib-bors', 'mattrobball'] nobody
168-40557
5 months ago
183-39361
6 months ago
0-5717
1 hour
24219 Paul-Lez
author:Paul-Lez
feat: linear independence of the tensor product of two linearly independent families This is still WIP (the proofs are a little too long, and some lemmas need to be moved to other files!) From Toric --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) toric t-algebra WIP
label:t-algebra$
193/0 Mathlib/LinearAlgebra/LinearIndependent/Tprod.lean 1 1 ['github-actions'] nobody
164-42255
5 months ago
164-42255
5 months ago
0-2221
37 minutes
13740 YaelDillies
author:YaelDillies
feat: More robust ae notation Make sure that, when `μ : FiniteMeasure Ω`, `f =ᵐ[μ] g` elaborates to `f =ᵐ[↑μ] g` instead of complaining about `OuterMeasureClass (FiniteMeasure Ω) (Set Ω) ℝ≥0∞` not existing. [Zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/ae.20of.20a.20finite.20measure) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability awaiting-CI t-meta 56/2 Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/OuterMeasure/AE.lean,Mathlib/MeasureTheory/OuterMeasure/BorelCantelli.lean 3 16 ['YaelDillies', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'urkud'] nobody
163-66727
5 months ago
163-66742
5 months ago
0-0
0 seconds
24161 urkud
author:urkud
feat(Analysis/Calculus/Schwarzian): new file --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 190/3 Mathlib.lean,Mathlib/Analysis/Calculus/Deriv/ZPow.lean,Mathlib/Analysis/Calculus/Schwarzian/Basic.lean 3 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
163-53581
5 months ago
163-53599
5 months ago
0-0
0 seconds
20652 jjaassoonn
author:jjaassoonn
feat: categorical description of center of a ring We show the isomorphism between `Z(R)` and `End(1 Mod-R)` --- - [x] depends on:#20721 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-category-theory awaiting-author
label:t-algebra$
212/21 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/Ring/Center.lean,Mathlib/CategoryTheory/Conj.lean,Mathlib/CategoryTheory/Endomorphism.lean,Mathlib/CategoryTheory/Preadditive/AdditiveFunctor.lean,Mathlib/CategoryTheory/Preadditive/Basic.lean 7 41 ['alreadydone', 'github-actions', 'jcommelin', 'jjaassoonn', 'kbuzzard', 'qawbecrdtey'] nobody
163-9693
5 months ago
220-61774
7 months ago
20-7596
20 days
21616 peabrainiac
author:peabrainiac
feat(Topology): concatenating countably many paths Adds `Path.countableConcat`, the concatenation of a sequence of paths leading up to some point `x`. --- - [x] depends on: #21591 - [x] depends on: #21607 This work is a prerequisite to #20248, where it is used to show that the topology of first-countable locally path-connected spaces is coinduced by all the paths in that space. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-author 229/0 Mathlib.lean,Mathlib/Topology/Path/CountableConcat.lean 2 30 ['YaelDillies', 'github-actions', 'kim-em', 'mathlib4-dependent-issues-bot', 'peabrainiac'] YaelDillies
assignee:YaelDillies
162-62016
5 months ago
166-69950
5 months ago
56-56728
56 days
18210 vihdzp
author:vihdzp
feat(Order/Hom/Basic): `WithBot (Fin n) ≃o Fin (n + 1)` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author 16/0 Mathlib/Order/Hom/Basic.lean 1 8 ['Command-Master', 'Ruben-VandeVelde', 'github-actions', 'urkud', 'vihdzp'] nobody
162-8324
5 months ago
333-12402
10 months ago
10-77913
10 days
23585 plp127
author:plp127
feat: `Filter.atMax` and `Filter.atMin` Adds `atMax` and `atMin`, filters. Making an analogy, `atMax` : `atTop` :: `IsMax` : `IsTop`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order WIP 148/0 Mathlib.lean,Mathlib/Order/Filter/AtMaxMin.lean 2 4 ['github-actions', 'plp127', 'urkud'] nobody
161-85533
5 months ago
184-60191
6 months ago
0-0
0 seconds
12032 mcdoll
author:mcdoll
feat: Delta distribution as a limit --- - [x] depends on: #11496 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis WIP 51/0 Mathlib/Analysis/Distribution/DiracDelta.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
159-13928
5 months ago
unknown
unknown
18861 YaelDillies
author:YaelDillies
refactor: make `Set.mem_graphOn` defeq The definition as an image is cute but not very useful. Also unsimp `graphOn_univ` since the RHS contains `f` more times than the LHS does. --- Later, I would like to introduce `Set.graph` to have a `Set` version with good defeqs of `LinearMap.graph` and alike [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-author 72/18 Mathlib/Data/Set/Function.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Data/Set/Prod.lean,Mathlib/MeasureTheory/Covering/Besicovitch.lean 4 4 ['YaelDillies', 'b-mehta', 'github-actions'] nobody
153-75001
5 months ago
194-28310
6 months ago
2-24624
2 days
23503 apnelson1
author:apnelson1
feat(Topology/Instances/ENat): ENat and tsum We give API for the interactions between `tsum` and `ENat`. The type is especially nice, because every function is summable, and there are simplifying lemmas like the statement that a sum is infinite iff either some term is infinite, or the support is infinite. This provides one of the missing pieces for working painlessly with discrete objects, 'propositional' finiteness and cardinality. For instance, one can sum a function `f : a -> ENat` over an arbitrary set with the term `∑' a : s, 1`, and it will be provable that `∑' a : s, 1 = s.encard` and `(support f).encard ≤ ∑' a, f a` without ever having to split into finite/infinite cases. As is pointed out in the module docstring for `Data.ENat`, there are strong analogies between `ENat` and `ENNReal`, and the API runs parallel to the API for `tsum`/`ENNReal`. One could call it 'duplication', but I have yet to find a common generalization of the two that saves work, or a third example of a natural type with these same properties. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-topology WIP 205/2 Mathlib/Data/ENat/Basic.lean,Mathlib/Data/Set/Card.lean,Mathlib/Topology/Instances/ENat.lean 3 2 ['eric-wieser', 'github-actions'] nobody
153-70882
5 months ago
153-70882
5 months ago
14-6036
14 days
22809 b-reinke
author:b-reinke
feat: Category algebras and path algebras This PR defines the category algebra of a linear category and path algebras of quivers. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra t-category-theory WIP
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
153-70846
5 months ago
153-70846
5 months ago
0-0
0 seconds
19797 eric-wieser
author:eric-wieser
refactor: use Qq in the nlinarith preprocessor This also provides the machinery needed to Qq-ify linarith itself. This is still doing far more `synthInstanceQ`/`isDefEq`(`Q`) than should be needed, but at least drops the `mkAppM`s. Currently, this takes a different approach to the one used by `NormNum.Result`: * `NormNum.Result` deliberately avoids adding any `Expr` parameters to types, as this makes defeq problem at compile-time hard * This PR allows the Expr parameters, but adds casting helpers to easily transport along defeq(Q)s. A few `unsafeIntro`s are left, which correspond to either a Qq bug, or a flaw in the idea behind this approach. I don't know if this pattern is an improvement. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-meta 260/28 Mathlib/Data/Ineq.lean,Mathlib/Tactic/Linarith/Datatypes.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm.lean,Mathlib/Tactic/Linarith/Preprocessing.lean,Mathlib/Util/Qq.lean 5 8 ['eric-wieser', 'github-actions', 'leanprover-bot'] nobody
153-70568
5 months ago
153-70568
5 months ago
0-0
0 seconds
14348 eric-wieser
author:eric-wieser
perf: disable the `unusedVariables` linter for speed I doubt we want to merge this, but it shaves two minutes of the lint time. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) performance-hack 1/0 lakefile.lean 1 3 ['eric-wieser', 'github-actions', 'leanprover-bot'] nobody
153-69876
5 months ago
153-69876
5 months ago
0-0
0 seconds
22488 smmercuri
author:smmercuri
fix: lower priority for `UniformSpace.Completion.instSMul` Following the introduction of the `WithVal` type synonym in #22055 the following instance takes a long time to synthesise in FLT, and times out in the default heartbeats ```lean import Mathlib namespace IsDedekindDomain.HeightOneSpectrum variable (A K : Type*) [CommRing A] [Field K] [Algebra A K] [IsFractionRing A K] [IsDedekindDomain A] (v : HeightOneSpectrum A) #synth SMul (v.adicCompletionIntegers K) (v.adicCompletion K) ``` The issue is that `UniformSpace.Completion.instSMul (v.adicCompletionIntegers K) (v.adicCompletion K)` now fires during the start of instance search (because we now have `UniformSpace (WithVal (v.valuation K))` whereas previously this would be `UniformSpace K`, which was not automatic), and this takes a long time to fail (leading to ~1400 entries in the trace). The first few lines of the new trace is ```lean [Meta.synthInstance] [5.512418] ✅️ SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▼ [] [0.000118] new goal SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000537] ✅️ apply UniformSpace.Completion.instSMul to SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.004411] ✅️ apply @WithVal.instSMul to SMul (↥(adicCompletionIntegers K v)) (WithVal (valuation K v)) ▶ [] [0.000765] ❌️ apply @GradedMonoid.GradeZero.smul to SMul (↥(adicCompletionIntegers K v)) K ▶ [] [0.000378] ✅️ apply @Algebra.toSMul to SMul (↥(adicCompletionIntegers K v)) K ▶ ... [] 1339 more entries... ▶ ``` Lowering the priority of `UniformSpace.Completion.instSMul` fixes this particular issue, leading to a trace that matches that seen prior to the introduction of `WithVal`: ```lean [Meta.synthInstance] [0.016405] ✅️ SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▼ [] [0.000119] new goal SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000491] ❌️ apply @GradedMonoid.GradeZero.smul to SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000403] ✅️ apply @Algebra.toSMul to SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000134] ❌️ apply inst✝⁴ to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000093] ❌️ apply inst✝⁵ to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000077] ❌️ apply inst✝⁷ to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000082] ❌️ apply inst✝⁹ to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000075] ❌️ apply inst✝¹² to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000220] ❌️ apply Algebra.id to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.001015] ✅️ apply @ValuationSubring.instAlgebraSubtypeMem to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [resume] [0.000038] propagating Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) to subgoal Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) of SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [check] [0.013358] ✅️ Algebra.toSMul [] result Algebra.toSMul ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) FLT t-topology awaiting-author 1/1 Mathlib/Topology/Algebra/UniformMulAction.lean 1 10 ['github-actions', 'leanprover-bot', 'smmercuri', 'urkud'] nobody
152-53660
4 months ago
158-82212
5 months ago
55-70108
55 days
15161 adomani
author:adomani
feat(Linter): flag `intros x y` which can be replaced by `intro x y` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter WIP 78/1 Mathlib/Tactic/Linter/Lint.lean,test/Lint.lean 2 4 ['adomani', 'github-actions', 'grunweg'] nobody
152-24728
4 months ago
152-59342
4 months ago
0-0
0 seconds
15649 TpmKranz
author:TpmKranz
feat(Computability): introduce Generalised NFA as bridge to Regular Expression Lays the groundwork for a proof of equivalence of NFA and RE, w.r.t. described language. Actual connection to NFA comes later, after the groundwork for the opposite direction has been laid. Second chunk of #12648 --- - [x] depends on: #15647 [Data.FinEnum.Option unchanged since then] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-computability new-contributor awaiting-author 298/0 Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/RegularExpressions.lean,docs/references.bib 5 6 ['github-actions', 'mathlib4-dependent-issues-bot', 'meithecatte', 'trivial1711'] nobody
151-17165
4 months ago
151-17174
4 months ago
23-54870
23 days
20648 anthonyde
author:anthonyde
feat: formalize regular expression -> εNFA The file `Computability/RegularExpressionsToEpsilonNFA.lean` contains a formal definition of Thompson's method for constructing an `εNFA` from a `RegularExpression` and a proof of its correctness. --- - [x] depends on: #20644 - [x] depends on: #20645 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-computability new-contributor 490/0 Mathlib.lean,Mathlib/Computability/RegularExpressionsToEpsilonNFA.lean,docs/references.bib 3 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'meithecatte', 'qawbecrdtey'] nobody
151-16476
4 months ago
151-17111
4 months ago
75-77754
75 days
23220 mattrobball
author:mattrobball
refactor(Module.LinearMap.Defs): make `SemilinearMapClass` extend `AddMonoidHomClass` Currently `SemilinearMapClass` extends `AddHomClass`. As both `SemilinearMapClass.toAddHomClass` and `AddMonoidHomClass.toAddHomClass` are projections, they have the same priority. With `SemilinearMapClass` declared later, it wins causing expensive failed searches in the algebraic hierarchy before `AddMonoidHomClass.toAddHomClass` is found. The current instance `SemilinearMapClass.toAddMonoidHomClass` has lower priority so we may need to downgrade the priority of the projection also. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
6/10 Mathlib/Algebra/Module/LinearMap/Defs.lean 1 9 ['eric-wieser', 'github-actions', 'leanprover-bot', 'mattrobball'] nobody
150-18611
4 months ago
150-18611
4 months ago
45-6308
45 days
24665 Komyyy
author:Komyyy
feat(Mathlib/Topology/Metrizable/Uniformity): every uniform space is generated by a family of pseudometrics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology WIP 54/0 Mathlib/Topology/Metrizable/Uniformity.lean 1 1 ['github-actions'] nobody
149-27385
4 months ago
149-27385
4 months ago
0-1
1 second
23213 mattrobball
author:mattrobball
chore(RingTheory.Derivation): add a `LinearMapClass` instance Often we want `simp` to call `map_zero` or `map_add` for a `Derivation`. To find the `ZeroHomClass` or `AddHomClass` instance necessary it starts to climb up the type class hierarchy including looking for a `LinearMapClass` instance which didn't exist. Consequently, sythesis would look in a lot of crazy places trying to summon ring structures on the module or on derivations itself. Here we add the missing `LinearMapClass` instance so that `simp` is more efficient. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra delegated
label:t-algebra$
5/3 Mathlib/RingTheory/Derivation/Basic.lean 1 8 ['github-actions', 'j-loreaux', 'leanprover-bot', 'mathlib-bors', 'mattrobball'] nobody
148-17823
4 months ago
148-17823
4 months ago
47-39026
47 days
23214 mattrobball
author:mattrobball
perf(Module.LinearMap.Defs): deprioritize projections to parents for `SemilinearMapClass` Trying to figure out if a given type has a `SemilinearMapClass` instance when all we want is an `AddHomClass` or a `MulActionSemiHomClass` can be quite expensive since there are multiple ways to crawl the algebraic hierarchy to generate `LinearMapClass` instances. If these fail, then they fail slowly. We deprioritize the projections from `SemilinearMapClass` to `AddHomClass` and `MulActionSemiHomClass` to make this one of the last choices. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra delegated
label:t-algebra$
6/0 Mathlib/Algebra/Module/LinearMap/Defs.lean 1 6 ['github-actions', 'j-loreaux', 'leanprover-bot', 'mathlib-bors', 'mattrobball'] nobody
148-17589
4 months ago
148-17589
4 months ago
47-32152
47 days
24155 eric-wieser
author:eric-wieser
feat: add a "rw_proc" for fin vectors This seems a little nicer than an elaborator, since it means I can use the default elaboration rules to handle my first few variables. Ideally there would be something like ```lean rw_procQ {A : Type u} {B : A -> Type v} (a : A) (b : B a) : b = ?rhs => do /-- Context: u v : Level A : Q(Type u) B : Q($A -> Type v) a : Q($A) b : Q($B $a) rhs : Q($B $a) -- metavariable to assign |- MetaM Q($b = ?rhs) -/ ``` or ```lean rw_proc {A : Type u} {B : A -> Type v} (a : A) (b : B a) : b = ?rhs => do /-- Context: u v : Level A B a b : Expr rhs : MVarId |- MetaM Expr -/ ``` which would generate the code I wrote here --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data RFC t-meta awaiting-author 27/2 Mathlib/Data/Fin/Tuple/Reflection.lean 1 2 ['github-actions', 'urkud'] nobody
148-14966
4 months ago
148-14966
4 months ago
20-83091
20 days
22314 shetzl
author:shetzl
feat: add leftmost derivations for context-free grammars Leftmost derivations are often easier to reason about than arbitrary derivations. This PR adds leftmost variants of Rewrites, Produces and Derives to the existing definition of context-free grammars and proves that a string of terminals can be derived iff it can be leftmost derived. Co-authored-by: Tobias Leichtfried --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor awaiting-author 383/0 Mathlib.lean,Mathlib/Computability/LeftmostDerivation.lean 2 54 ['YaelDillies', 'github-actions', 'madvorak', 'shetzl'] YaelDillies
assignee:YaelDillies
147-61840
4 months ago
147-61840
4 months ago
72-3718
72 days
21276 GabinKolly
author:GabinKolly
feat(ModelTheory/Substructures): define equivalences between equal substructures Define first-order equivalences between equal substructures, and prove related properties. --- This is some preparatory work for #18876 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic awaiting-author 62/0 Mathlib/ModelTheory/Substructures.lean 1 19 ['GabinKolly', 'YaelDillies', 'fpvandoorn', 'github-actions', 'grunweg'] nobody
147-37160
4 months ago
147-37160
4 months ago
46-55730
46 days
23137 grunweg
author:grunweg
chore(Topology): some more fun_prop tagging --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology delegated 8/4 Mathlib/Dynamics/Flow.lean,Mathlib/Topology/Algebra/Monoid.lean 2 10 ['github-actions', 'grunweg', 'j-loreaux', 'mathlib-bors'] nobody
147-20038
4 months ago
147-20038
4 months ago
34-32727
34 days
24532 robertmaxton42
author:robertmaxton42
feat(LinearAlgebra/FreeProduct): fill out the `FreeProduct.asPowers` namespace * Replicate the existing API for `LinearAlgebra.FreeProduct` under `FreeProduct.asPowers`, for convenience when working primarily with the power algebra representation * Adds convenience lemmas for using the corresponding quotient relation `rel'` (used in the above). --- - [x] depends on: #24531 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
122/5 Mathlib/LinearAlgebra/FreeProduct/Basic.lean 1 25 ['YaelDillies', 'adomani', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'robertmaxton42'] nobody
145-67520
4 months ago
145-67572
4 months ago
146-29466
146 days
24008 meithecatte
author:meithecatte
chore(EpsilonNFA): replace manual lemmas with @[simps] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor awaiting-author 2/24 Mathlib/Computability/EpsilonNFA.lean 1 2 ['YaelDillies', 'github-actions', 'urkud'] nobody
145-62704
4 months ago
145-62704
4 months ago
27-52316
27 days
24744 Timeroot
author:Timeroot
Post's lattice Draft PR for now so I can get CI checks. Eventually want to prove Post's Lattice --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP 758/0 Mathlib.lean,Mathlib/Algebra/Clone/Basic.lean,Mathlib/Algebra/Clone/Defs.lean,Mathlib/Algebra/Clone/Instances.lean,Mathlib/Algebra/Clone/PostLattice.lean,Mathlib/Data/Fin/Basic.lean 6 1 ['github-actions'] nobody
143-69173
4 months ago
143-69173
4 months ago
0-0
0 seconds
24618 b-mehta
author:b-mehta
feat(Analysis): add Schur inequality and variants Add Schur inequality and some of its common variants. TODO: - [x] add reference to source: https://www.cip.ifi.lmu.de/~grinberg/VornicuS.pdf - [ ] add other generalisations - [ ] move some of the lemmas elsewhere --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis WIP 145/0 Mathlib/Analysis/Convex/Schur.lean 1 16 ['b-mehta', 'eric-wieser', 'github-actions'] nobody
142-50237
4 months ago
151-30175
4 months ago
0-2
2 seconds
24957 eric-wieser
author:eric-wieser
feat: use ` binderNameHint` in sum_congr Zulip thread: [#new members > Choosing dummy variable inside summation @ 💬](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Choosing.20dummy.20variable.20inside.20summation/near/518492888) Co-authored-by: Joachim Breitner --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
23/16 Mathlib/Algebra/BigOperators/Expect.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finset/Lattice/Fold.lean,Mathlib/Data/List/OfFn.lean,Mathlib/Data/Multiset/Count.lean,Mathlib/Data/Multiset/Filter.lean,Mathlib/Data/Multiset/MapFold.lean,Mathlib/Data/Option/Basic.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Sym/Basic.lean,Mathlib/Data/Sym/Sym2.lean 13 1 ['github-actions'] nobody
140-49381
4 months ago
140-50831
4 months ago
140-50881
140 days
5919 MithicSpirit
author:MithicSpirit
feat: implement orthogonality for AffineSubspace Define `AffineSubspace.orthogonal` and `AffineSubspace.IsOrtho`, as well as develop an API emulating that of `Submodule.orthogonal` and `Submodule.IsOrtho`, respectively. Additionally, provide some relevant lemmas exclusive to affine subspaces, which are mostly to do with the relationship between orthogonality and `AffineSubspace.Parallel`. Closes #5539 --- Still WIP as I need to add more docstrings as well as notations for the new definitions. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis WIP help-wanted 287/0 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/AffineSubspace.lean 2 6 ['MithicSpirit', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] MithicSpirit
assignee:MithicSpirit
139-32850
4 months ago
139-32868
4 months ago
0-0
0 seconds
22539 joelriou
author:joelriou
feat(Algebra/Homology): construction of left resolutions Given a fully faithful functor `ι : C ⥤ A` to an abelian category, we introduce a structure `Abelian.LeftResolutions ι` which gives a functor `F : A ⥤ C` and a natural epimorphism `π.app X : ι.obj (F.obj X) ⟶ X` for all `X : A`. This is used in order to construct a resolution functor `LeftResolutions.chainComplexFunctor : A ⥤ ChainComplex C ℕ`. This shall be used in order to derive the tensor product of modules and sheaves of modules. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory WIP 271/19 Mathlib.lean,Mathlib/Algebra/Homology/HomologicalComplex.lean,Mathlib/Algebra/Homology/LeftResolutions/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Kernels.lean 4 1 ['github-actions'] nobody
138-54378
4 months ago
154-43196
5 months ago
59-17063
59 days
21624 sinhp
author:sinhp
feat(CategoryTheory): The (closed) monoidal structure on the product category of families of (closed) monoidal categories Given a family of closed monoidal categories, we show that the product of these categories is a closed monoidal category with the pointwise monoidal structure. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 144/0 Mathlib.lean,Mathlib/CategoryTheory/Pi/Basic.lean,Mathlib/CategoryTheory/Pi/Monoidal.lean,Mathlib/CategoryTheory/Pi/MonoidalClosed.lean 4 19 ['TwoFX', 'YaelDillies', 'b-mehta', 'github-actions', 'jcommelin', 'sinhp'] nobody
136-71077
4 months ago
136-71077
4 months ago
54-54882
54 days
11155 smorel394
author:smorel394
feat(LinearAlgebra/Multilinear/DirectSum, LinearAlgebra/DirectSum/{PiTensorProduct,Finsupp}): interaction between `MultilinearMap` and `DirectSum`, and between `PiTensorProduct` and `DirectSum` This does three things: * `MultilinearMap.fromDirectSumEquiv` (in `LinearAlgebra/MultilinearMap/DirectSum.lean`) calculates `MultilinearMap`s on a family of `DirectSum`s. More precisely, if `ι` is a `Fintype`, if `κ i` is a family of types indexed by `ι` and we have a `R`-module `M i j` for every `i : ι` and `j : κ i`, this is the linear equivalence between `Π p : (i : ι) → κ i, MultilinearMap R (fun i ↦ M i (p i)) M'` and `MultilinearMap R (fun i ↦ ⨁ j : κ i, M i j) M'`. * `PiTensorProduct.directSum` (in `LinearAlgebra/DirectSum/PiTensorProduct.lean`): the distributivity property of a `PiTensorProduct` with respect to `DirectSum`s in all its arguments. * `finsuppPiTensorProduct` (in `LinearAlgebra/DirectSum/Finsupp.lean`): If `ι` is a `Fintype`, `κ i` is a family of types indexed by `ι` and `M i` is a family of `R`-modules indexed by `ι`, then the tensor product of the family `κ i →₀ M i` is linearly equivalent to `∏ i, κ i →₀ ⨂[R] i, M i`. - [x] depends on: #11152 - [x] depends on: #11196 - [x] depends on: #17881 - [x] depends on: #17932 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra please-adopt
label:t-algebra$
322/0 Mathlib.lean,Mathlib/LinearAlgebra/DFinsupp/PiTensorProduct.lean,Mathlib/LinearAlgebra/DirectSum/Finsupp.lean,Mathlib/LinearAlgebra/DirectSum/PiTensorProduct.lean,Mathlib/LinearAlgebra/Multilinear/DFinsupp.lean,Mathlib/LinearAlgebra/Multilinear/DirectSum.lean 6 32 ['Ruben-VandeVelde', 'eric-wieser', 'github-actions', 'mathlib4-dependent-issues-bot', 'smorel394'] nobody
133-8438
4 months ago
133-10643
4 months ago
6-23591
6 days
19456 AntoineChambert-Loir
author:AntoineChambert-Loir
feat(Data/Finsupp/MonomialOrder/DegRevLex): homogeneous reverse lexicographic order Definition of the homogeneous reverse lexicographic order --- - [x] depends on: #19453 - [x] depends on: #19455 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data t-order t-algebraic-geometry WIP 362/0 Mathlib.lean,Mathlib/Data/Finsupp/MonomialOrder/DegLex.lean,Mathlib/Data/Finsupp/MonomialOrder/DegRevLex.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
132-34495
4 months ago
132-34495
4 months ago
0-1720
28 minutes
24690 ScottCarnahan
author:ScottCarnahan
feat (Data.Prod): Reverse lexicographic order This PR implements the type synonym RevLex as a one-field structure, defines an order on products, and proves an order isomorphism with the Lex product with factors switched. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order WIP 141/0 Mathlib.lean,Mathlib/Data/Prod/RevLex.lean 2 4 ['ScottCarnahan', 'YaelDillies', 'github-actions'] YaelDillies
assignee:YaelDillies
128-75940
4 months ago
129-1233
4 months ago
19-33859
19 days
22919 plp127
author:plp127
feat(Data/Fintype/Pi): Make `Fintype` instance for `RelHom`s computable Makes the `Fintype` instance for rel homs computable. See this [Zulip](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Classical.20vs.20constructive.20logic.20in.20computation/near/496220816) message. --- - [x] depends on: #24748 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-author 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 29 ['IvanRenison', 'b-mehta', 'eric-wieser', 'fpvandoorn', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'plp127'] b-mehta
assignee:b-mehta
127-83681
4 months ago
127-83681
4 months ago
73-73341
73 days
25170 eric-wieser
author:eric-wieser
refactor: make basis computable I claim that in the long run, `Basis.repr` should be a `DFinsupp` not `Finsupp`, so that it is computable. To make this change incrementally, we can store a `DFinsupp` internally today, and keep `repr` and `ofRepr` working with finsupp. This at least would allow building a large basis object, and then using `repr'` to compute with it. The cost of this intermediate state is a loss of many defeqs. --- - [ ] depends on: #25166 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra
label:t-algebra$
66/21 Mathlib/LinearAlgebra/Basis/Basic.lean,Mathlib/LinearAlgebra/Basis/Defs.lean,Mathlib/LinearAlgebra/FreeModule/Basic.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
127-12933
4 months ago
127-64331
4 months ago
0-0
0 seconds
24065 kim-em
author:kim-em
chore: script to give topological sort of modules This script is not useful by itself: it just gives a topological sort of Mathlib's import graph. But I've several times found it useful when I want to modify many files systematically with minimal rebuilding: just work backwards through the list. awaiting-author 96/0 scripts/README.md,scripts/topological_sort.py 2 5 ['github-actions', 'jcommelin', 'kim-em'] jcommelin
assignee:jcommelin
123-75108
4 months ago
123-75108
4 months ago
48-7769
48 days
20238 maemre
author:maemre
feat(Computability/DFA): Closure of regular languages under some set operations This shows that regular languages are closed under complement and intersection by constructing DFAs for them. --- Closure under all other operations will be proved when someone adds the proof for DFA<->regular expression equivalence, so they are not part of this PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-computability new-contributor awaiting-author 159/0 Mathlib/Computability/DFA.lean,Mathlib/Computability/Language.lean 2 59 ['EtienneC30', 'YaelDillies', 'github-actions', 'maemre', 'meithecatte', 'urkud'] EtienneC30
assignee:EtienneC30
121-69336
3 months ago
151-17075
4 months ago
48-67492
48 days
25429 Paul-Lez
author:Paul-Lez
feat(Analysis/PDE/Quasilinear/Defs): Add definitions about quasilinear first order PDEs This PR introduces some basic definitions related to first order quasilinear PDEs. In a subsequent PR (I'm currently cleaning up the code), these will be used to state and prove some results about how solutions to quasilinear PDEs vary along characteristic curves. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 141/0 Mathlib.lean,Mathlib/Analysis/PDE/Quasilinear/Defs.lean 2 1 ['github-actions'] nobody
121-50821
3 months ago
121-58991
3 months ago
0-0
0 seconds
25473 adomani
author:adomani
feat(CI): check that Mathlib files have lean or md extension Twice recently there have been files with an "intended" `.lean` extension in `Mathlib/`: * #24942, ending in `;lean`; * #25457, ending in `.Lean`. `mk_all` does not add these files to `Mathlib.lean`, since they do not end in `.lean` and this later causes problems. This CI step checks that all files in `Mathlib/` end with `.lean` or `.md`. See #25474 for a test where the new step [correctly fails](https://github.com/leanprover-community/mathlib4/actions/runs/15464097783/job/43532018379?pr=25474). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI delegated 10/0 .github/workflows/lint_and_suggest_pr.yml 1 10 ['adomani', 'bryangingechen', 'github-actions', 'grunweg', 'mathlib-bors'] nobody
120-51612
3 months ago
120-52502
3 months ago
0-11212
3 hours
24441 MrSumato
author:MrSumato
feat(Data/List): add Lyndon-Schutzenberger theorem on list commutativity Add Lyndon-Schutzenberger theorem on list commutativity. Included definition for List.repeatSelf that returns list repeated n times. --- This is my first mathlib PR, so any comments are highly appreciated. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor awaiting-author 129/1 Mathlib.lean,Mathlib/Data/List/Commutativity.lean,Mathlib/Data/List/Defs.lean,Mathlib/Data/List/Lemmas.lean 4 35 ['MrSumato', 'github-actions', 'grunweg', 'plp127'] grunweg
assignee:grunweg
119-51113
3 months ago
119-51113
3 months ago
29-59355
29 days
23929 meithecatte
author:meithecatte
feat(Computability/NFA): improve bound on pumping lemma --- - [x] depends on: #25321 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-computability new-contributor 101/10 Mathlib/Computability/EpsilonNFA.lean,Mathlib/Computability/NFA.lean 2 41 ['YaelDillies', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'meithecatte'] nobody
118-26727
3 months ago
118-26728
3 months ago
34-10595
34 days
25579 JovanGerb
author:JovanGerb
feat(Order/Notation): only allow ⊔/⊓ for non-linear orders ⊔/⊓ is the same as max/min. The difference is that it is meant to be used if and only if there is no linear order. This PR implements a check for one of the two directions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 33/7 Mathlib/Order/Notation.lean 1 1 ['github-actions'] nobody
117-59835
3 months ago
118-2371
3 months ago
0-0
0 seconds
25035 ScottCarnahan
author:ScottCarnahan
feat (Algebra/Module/Equiv/Defs): Linear equivalence between linear hom and semilinear hom. Given a ring homomorphism `σ₂ : R →+* R₂`, an `R`-module `M`, and a module `M₂` for both `R` and `R₂` satisfying `SMulCommClass R R₂ M₂` and `(σ₂ r) • x = r • x`, we produce an `R₂`-linear equivalence between `M →ₗ[R] M₂` and `M →ₛₗ[σ₂] M₂`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra WIP
label:t-algebra$
21/0 Mathlib/Algebra/Module/Equiv/Defs.lean 1 1 ['github-actions'] nobody
116-72544
3 months ago
116-72544
3 months ago
20-7584
20 days
25034 ScottCarnahan
author:ScottCarnahan
feat (Algebra/Module/Equiv/Basic): Restriction of scalars from a semilinear equivalence to a linear equivalence. If `M` and `M₂` are both `R`-modules and modules for `S` and `S₂`, respectively, then for any ring isomorphism `e` between `S` and `S₂` and any `e`-semilinear equivalence between `M` and `M₂` that respects the `R`-action, we obtain an `R`-linear equivalence between `M` and `M₂`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra WIP
label:t-algebra$
28/0 Mathlib/Algebra/Module/Equiv/Basic.lean 1 1 ['github-actions'] nobody
116-72519
3 months ago
116-72519
3 months ago
20-11468
20 days
24540 robertmaxton42
author:robertmaxton42
feat(Quiv): add the empty, vertex, point, interval, and walking quivers Add: * The empty quiver * The vertex quiver (one vertex, and no edges) and the point quiver (one vertex, one self-edge) * The interval quiver (two vertices with an edge between them) * The walking quiver (vertices `0` and `1` with two edges both `0 -> 1`. Functors from the walking quiver to `Type` define quivers, by interpreting `F.obj 0` as the type of vertices, `F.obj 1` as the type of edges, using one of the two edges to label the source of every edge and using the other to label the target.) - [x] depends on: #24538 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 370/0 Mathlib.lean,Mathlib/CategoryTheory/Category/Quiv/Shapes.lean,Mathlib/CategoryTheory/Category/Quiv/WalkingQuiver.lean,Mathlib/Logic/Small/Defs.lean 4 13 ['github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'robertmaxton42', 'robin-carlier'] nobody
115-51542
3 months ago
119-15555
3 months ago
0-80193
22 hours
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. new-contributor t-analysis awaiting-author 111/1 Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Lemmas.lean,Mathlib/Analysis/Calculus/Taylor.lean 3 12 ['Paul-Lez', 'github-actions', 'grunweg', 'mhk119'] nobody
115-11232
3 months ago
176-52928
5 months ago
30-77130
30 days
21344 kbuzzard
author:kbuzzard
chore: attempt to avoid diamond in OreLocalization --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra please-adopt
label:t-algebra$
16/5 Mathlib/RingTheory/OreLocalization/Basic.lean 1 6 ['erdOne', 'github-actions', 'kbuzzard'] nobody
115-8810
3 months ago
115-10901
3 months ago
53-20069
53 days
25683 eric-wieser
author:eric-wieser
feat: Enumeration of NonemptyInterval --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-data 52/4 Mathlib/Data/Sym/Sym2/Fin.lean,Mathlib/Data/Sym/Sym2/Order.lean 2 1 ['github-actions'] nobody
115-7836
3 months ago
115-7836
3 months ago
0-0
0 seconds
25746 robin-carlier
author:robin-carlier
feat(Tactic/CategoryTheory): `Cancelable` boilerplate for the `rotate_isos` WIP tactic This PR adds some boilerplate that will be used in a forthcoming PR implementing a `rotate_isos` tactic that aims to provide easy ways of moving one or more morphisms that can be inferred to be isomorphisms (not necessarily through the `IsIso typeclass, but also directly by recognizing them as e.g components of natural isomorphisms, or functor application to such morphisms). The boilerplate in this PR abstracts the notion of a cancelable expression for a morphism in a composition of (iso)morphisms in a category, and records a global reference to a list of "cancelable factories", _i.e_ functions that try to recognize term in an expression as a "cancelable" morphism, and provides helper to register such functions. --- First part of a series of 3 PRs contributing the `rotate_isos` tactic to mathlib. Second part will actually implement the tactic, and provide a test suite. Please read the description of the second PR (#24454) to get more details. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24452.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24452* t-category-theory t-meta awaiting-author 162/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Cancelable.lean,scripts/noshake.json 4 1 ['github-actions'] nobody
113-69293
3 months ago
113-69322
3 months ago
0-0
0 seconds
25585 Paul-Lez
author:Paul-Lez
feat(Tactic/Linters/DeprecatedSimpLemma): lint for deprecated simp lemmas The deprecated simp lemma linter flags declarations that have both the `deprecated` and `simp` attributes. See Zulip discussion: [#mathlib4 > Help with Mathlib.Order.Interval.Finset.Defs @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Help.20with.20Mathlib.2EOrder.2EInterval.2EFinset.2EDefs/near/505994843) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter awaiting-author 105/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/DeprecatedSimpLemma.lean,MathlibTest/DeprecatedSimpLemmaTest.lean 4 7 ['adomani', 'github-actions', 'grunweg'] nobody
113-65406
3 months ago
117-21223
3 months ago
0-34675
9 hours
25802 dagurtomas
author:dagurtomas
feat(AlgebraicTopology): anodyne morphisms of simplicial sets --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #20201.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/20201* t-topology WIP 148/0 Mathlib.lean,Mathlib/AlgebraicTopology/Anodyne.lean,Mathlib/AlgebraicTopology/KanFibration.lean,Mathlib/CategoryTheory/MorphismProperty/WeakSaturation.lean 4 1 ['github-actions'] nobody
113-58094
3 months ago
113-58111
3 months ago
0-2
2 seconds
25835 erdOne
author:erdOne
WIP: Weierstrass elliptic functions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #21662.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/21662* t-analysis WIP 1461/0 Mathlib/Analysis/Elliptic/Basic.lean 1 1 ['github-actions'] nobody
112-64271
3 months ago
112-64313
3 months ago
0-33
33 seconds
25838 Bergschaf
author:Bergschaf
feat(Order/Atoms): Finsets are Atomistic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-order 31/0 Mathlib/Order/Atoms.lean 1 1 ['github-actions'] nobody
112-57553
3 months ago
112-57553
3 months ago
0-0
0 seconds
25765 JovanGerb
author:JovanGerb
feat(gcongr): lemma for rewriting inside divisibility TODO: add test to show that we can rewrite using `a ≡ b [ZMOD n]` inside `n ∣ 2 * a + 1`. edit: it's not yet entirely clear if this is the right thing to do. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data delegated 5/0 Mathlib/Data/Int/ModEq.lean 1 3 ['fpvandoorn', 'github-actions', 'mathlib-bors'] nobody
112-10049
3 months ago
112-45587
3 months ago
1-19951
1 day
25871 eric-wieser
author:eric-wieser
refactor: generalize rank lemmas to semirings --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
18/8 Mathlib/LinearAlgebra/Dimension/Finite.lean 1 1 ['github-actions'] nobody
111-37510
3 months ago
111-37536
3 months ago
0-0
0 seconds
25911 BoltonBailey
author:BoltonBailey
make `a / b` simp normal form This PR continues the work from #25631. Original PR: https://github.com/leanprover-community/mathlib4/pull/25631 t-algebra
label:t-algebra$
11/1 Mathlib/Algebra/Group/Defs.lean 1 2 ['BoltonBailey', 'github-actions'] nobody
110-43300
3 months ago
110-43303
3 months ago
0-0
0 seconds
25918 BoltonBailey
author:BoltonBailey
feat: one time pad string diagram This PR continues the work from #10655. Original PR: https://github.com/leanprover-community/mathlib4/pull/10655 159/0 MathlibTest/StringDiagram.lean 1 2 ['BoltonBailey', 'github-actions'] nobody
110-41444
3 months ago
110-41532
3 months ago
0-0
0 seconds
25990 Multramate
author:Multramate
chore(NumberTheory/EllipticDivisibilitySequence): rename definitions This PR continues the work from #25132. Original PR: https://github.com/leanprover-community/mathlib4/pull/25132 t-number-theory 265/45 Mathlib/NumberTheory/EllipticDivisibilitySequence.lean 1 2 ['Multramate', 'github-actions'] nobody
109-17349
3 months ago
109-17349
3 months ago
0-0
0 seconds
25987 Multramate
author:Multramate
refactor(AlgebraicGeometry/EllipticCurve/Affine/*): some minor changes This PR continues the work from #24571. Original PR: https://github.com/leanprover-community/mathlib4/pull/24571 t-algebraic-geometry 0/12 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean 2 n/a ['Multramate', 'github-actions', 'grunweg'] nobody
108-63910
3 months ago
unknown
unknown
25921 BoltonBailey
author:BoltonBailey
feat: scripts to analyze overlap between namespaces This PR continues the work from #11385. Original PR: https://github.com/leanprover-community/mathlib4/pull/11385 migrated-from-branch t-meta WIP 86/0 scripts/RecordNamespaces.lean,scripts/namespace-overlap.py 2 1 ['github-actions'] nobody
108-29311
3 months ago
108-29311
3 months ago
2-11832
2 days
26085 grunweg
author:grunweg
feat: disjoint unions distribute with products of manifolds This PR continues the work from #22611. Original PR: https://github.com/leanprover-community/mathlib4/pull/22611 t-differential-geometry please-adopt WIP 75/6 Mathlib/Geometry/Manifold/Diffeomorph.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean 2 2 ['github-actions', 'grunweg'] nobody
107-51369
3 months ago
107-51371
3 months ago
0-74
1 minute
26174 grunweg
author:grunweg
feat: split continuous linear maps We define split linear maps and prove their basic properties. Manually migrated from #23186. --- There are two sorries left. One is `ClosedComplemented.prod`; the other relates to the composition of split maps. Help with both is welcome. [This zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Composition.20of.20immersions.20is.20an.20immersion.3A.20infinite-dimensio/with/507300190) contains a proof of the non-trivial sorry. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis WIP help-wanted 249/0 Mathlib.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Splits.lean 2 1 ['github-actions'] nobody
106-17927
3 months ago
106-17954
3 months ago
0-0
0 seconds
25803 erdOne
author:erdOne
feat: taylor expansion of `1 / z ^ r` --- This might exist somewhere else but I couldn't find them. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #21693.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/21693* t-analysis awaiting-author 95/0 Mathlib.lean,Mathlib/Analysis/SpecificLimits/InvPow.lean 2 5 ['erdOne', 'github-actions', 'j-loreaux', 'vasnesterov'] nobody
105-24942
3 months ago
105-24942
3 months ago
8-29520
8 days
26239 BoltonBailey
author:BoltonBailey
feat: add sample pre-commit git hook file This PR adds a sample pre-commit git hook file that runs `mk_all` and `lint-style`. The script provides instructions on how to activate these as git hooks. Installing these would be optional, but hopefully people who would install them would find it easier to avoid commits that immediately fail linters. Discussion of hooks on [Zulip here](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Automatic.20setup.20and.20distribution.20of.20git.20hooks/with/525103090). Some thoughts: - Perhaps it would be better, for speed, to attempt to avoid certain commands if the staged changes suggest they would be unnecessary. - i.e. only run linters on files that have been updated / only run `mk_all` if a file has been added or deleted. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP 18/0 git_hooks/pre-commit 1 1 ['github-actions'] nobody
105-21144
3 months ago
105-21144
3 months ago
0-1331
22 minutes
26231 chrisflav
author:chrisflav
feat(CategoryTheory/Sites): sheaf condition and coproducts We show that under suitable conditions, checking that a presheaf is a sheaf for a covering is equivalent to checking it on the single object covering by the coproduct. --- I am not sure this is the correct file, but I had no better idea. Happy to move it somewhere else. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 58/0 Mathlib/CategoryTheory/Sites/Sheaf.lean 1 3 ['chrisflav', 'github-actions', 'joelriou'] nobody
103-63173
3 months ago
103-63831
3 months ago
1-60053
1 day
24395 rudynicolop
author:rudynicolop
feat(Data/List): list splitting definitions and lemmas Adds definitions and lemmas for obtaining all prefixes and suffixes of lists. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor awaiting-author 143/2 Mathlib/Data/List/Perm/Lattice.lean,Mathlib/Data/List/TakeDrop.lean 2 4 ['BoltonBailey', 'github-actions'] ericrbg
assignee:ericrbg
103-19072
3 months ago
103-19072
3 months ago
57-9536
57 days
21450 eric-wieser
author:eric-wieser
feat: improve trace nodes for `positivity` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 25/7 Mathlib/Tactic/Positivity/Core.lean 1 1 ['github-actions'] nobody
103-17923
3 months ago
240-74637
7 months ago
0-0
0 seconds
26292 RemyDegenne
author:RemyDegenne
feat(MeasureTheory): tightness of the range of a sequence * `isTightMeasureSet_range_iff_tendsto_limsup_measure_norm_gt`: in a proper normed group, the range of a sequence of measures `μ : ℕ → Measure E` is tight if and only if the function `r : ℝ ↦ limsup (fun n ↦ μ n {x | r < ‖x‖}) atTop` tends to `0` at infinity. * `isTightMeasureSet_range_iff_tendsto_limsup_inner`: in a finite-dimensional inner product space, the range of a sequence of measures `μ : ℕ → Measure E` is tight if and only if the function `r : ℝ ↦ limsup (fun n ↦ μ n {x | r < ‖⟪y, x⟫_𝕜‖}) atTop` tends to `0` at infinity for all `y`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24838.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24838* t-measure-probability awaiting-author 197/2 Mathlib/MeasureTheory/Measure/TightNormed.lean 1 1 ['github-actions'] nobody
102-67170
3 months ago
102-67235
3 months ago
0-1
1 second
26293 RemyDegenne
author:RemyDegenne
feat: tightness from convergence of characteristic functions If the characteristic functions of a sequence of measures `μ : ℕ → Measure E` on a finite dimensional inner product space converge pointwise to a function which is continuous at 0, then `{μ n | n}` is tight. --- - [x] depends on: #24838 - [x] depends on: #24846 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24949.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24949* t-measure-probability WIP 352/2 Mathlib.lean,Mathlib/MeasureTheory/Measure/TightCharFun.lean,Mathlib/MeasureTheory/Measure/TightNormed.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
102-66181
3 months ago
102-66182
3 months ago
0-2
2 seconds
20924 tomaz1502
author:tomaz1502
feat(Computability/QueryComplexity): Oracle-based computation This PR adds the types and lemmas for oracle-based computation. In this model, computations are run on a monad which also counts the number of oracle queries executed. With it, it becomes possible to reason about the upper bound of the query complexity of algorithms. In the future, we could extend this work to include the necessary bits from information theory and probability to also reason about lower bounds on query complexity, like the work in https://github.com/girving/debate. Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2318629.20runtime.20complexity.20of.20sorting.20a.20list Co-authored-by: Geoffrey Irving --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability 305/0 Mathlib.lean,Mathlib/Computability/QueryComplexity/Basic.lean,Mathlib/Computability/QueryComplexity/Defs.lean 3 59 ['eric-wieser', 'girving', 'github-actions', 'quangvdao', 'tomaz1502'] nobody
102-45976
3 months ago
254-39164
8 months ago
254-39145
254 days
26327 eric-wieser
author:eric-wieser
chore: split the tests for positivity --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 528/2 MathlibTest/Positivity/basic.lean,MathlibTest/positivity.lean 2 1 ['github-actions'] nobody
102-15940
3 months ago
102-16029
3 months ago
0-0
0 seconds
26087 grunweg
author:grunweg
feat: a `SliceModel` typeclass for models with corners for embedded submanifolds We define a new typeclass to denote a model with corners which "embeds" into another one: there are an embedding of the underlying topological spaces and a continuous linear inclusion between the normed spaces, which are compatible with the maps given by the models with corners. This condition is used for defining smooth (immersed and embedded) submanifolds: for `M` to be a submanifold of `N`, to boot their models with corners should be slice models. This will be defined in a future PR. To prove this definition is workable, we construct many basic instances of slice models - each model with corners is one over itself - slice models are transitive - each model with corners I embeds into two products `I.prod J` and `J.prod I` - Euclidean n-half-space embeds into Euclidean n-space - a Euclidean n-quadrant embeds into Euclidean half-space (hence into Euclidean n-space) - if n\leq m, Euclidean n-space embeds into Euclidean m-space [zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Infinite-dimensional.20manifolds/near/413117885) ----------- - [x] depends on: #26083 - [x] depends on: #26082 - [x] depends on: #26086 - [x] depends on: #25705 This PR continues the work from #25505. t-differential-geometry 229/0 Mathlib.lean,Mathlib/Geometry/Manifold/SliceModel.lean 2 3 ['github-actions', 'grunweg', 'mathlib4-dependent-issues-bot'] nobody
101-30441
3 months ago
101-41121
3 months ago
101-42578
101 days
26389 jjdishere
author:jjdishere
feat(RingTheory): Perfectoid Field This PR continues the work from #19972. Original PR: https://github.com/leanprover-community/mathlib4/pull/19972 t-algebra t-analysis t-topology WIP
label:t-algebra$
150/0 Mathlib/RingTheory/Perfectoid.lean 1 2 ['github-actions', 'jjdishere'] nobody
101-484
3 months ago
101-491
3 months ago
0-69
1 minute
26390 jjdishere
author:jjdishere
feat(Topology/Algebra): Krasner's lemma This PR continues the work from #18444. Original PR: https://github.com/leanprover-community/mathlib4/pull/18444 t-algebra t-topology t-number-theory WIP
label:t-algebra$
440/0 Mathlib.lean,Mathlib/Topology/Algebra/Krasner.lean 2 n/a ['github-actions', 'jjdishere'] nobody
101-277
3 months ago
unknown
unknown
26376 maddycrim
author:maddycrim
Simons2025 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor WIP 29/0 Mathlib/RingTheory/Localization/Pi.lean 1 1 ['github-actions'] faenuccio
assignee:faenuccio
100-45062
3 months ago
101-23535
3 months ago
0-13
13 seconds
26432 AntoineChambert-Loir
author:AntoineChambert-Loir
feat(Data.Nat.LogFueled): fueled version of `clog` This PR continues the work from #25557. Original PR: https://github.com/leanprover-community/mathlib4/pull/25557 t-data 201/0 Mathlib.lean,Mathlib/Data/Nat/LogFueled.lean 2 2 ['AntoineChambert-Loir', 'github-actions'] nobody
99-60416
3 months ago
99-60418
3 months ago
99-60464
99 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. new-contributor t-number-theory awaiting-author 217/0 Mathlib.lean,Mathlib/NumberTheory/LegendreSymbol/Basic.lean,Mathlib/NumberTheory/LegendreSymbol/QuadraticReciprocity.lean,Mathlib/NumberTheory/LegendreSymbol/QuadraticResidueRoots.lean 4 2 ['github-actions', 'kckennylau'] literandltx
assignee:literandltx
95-64589
3 months ago
96-7275
3 months ago
17-63153
17 days
25993 Multramate
author:Multramate
feat(Algebra/Group/Units/Hom): add map lemmas This PR continues the work from #25609. Original PR: https://github.com/leanprover-community/mathlib4/pull/25609 t-algebra awaiting-author
label:t-algebra$
27/10 Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Group/Units/Hom.lean 2 5 ['Multramate', 'Ruben-VandeVelde', 'github-actions'] nobody
94-66341
3 months ago
94-66341
3 months ago
14-37502
14 days
26013 tsuki8
author:tsuki8
feat(Data/Finset/Card,Data/Set/Finite/Basic) add `card_bijOn` and `finset_subset_preimage_of_finite_image` Add `card_bijOn`: proves that for a bijection between finsets, their cardinalities are equal Add `finset_subset_preimage_of_finite_image`: constructs a finset subset preserving image cardinality Co-authored-by: Junyu Guo --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor awaiting-author 15/0 Mathlib/Data/Finset/Card.lean,Mathlib/Data/Set/Finite/Basic.lean 2 5 ['Ruben-VandeVelde', 'github-actions'] nobody
94-52964
3 months ago
94-65256
3 months ago
13-85893
13 days
26348 mans0954
author:mans0954
WIP: feature(Analysis/LocallyConvex/Prime): The prime map This PR continues the work from #24385. Original PR: https://github.com/leanprover-community/mathlib4/pull/24385 t-analysis WIP 125/0 Mathlib.lean,Mathlib/Analysis/LocallyConvex/Prime.lean 2 2 ['github-actions', 'mans0954'] nobody
93-23414
3 months ago
96-27645
3 months ago
5-43062
5 days
26346 mans0954
author:mans0954
feature(LinearAlgebra/QuadraticForm/TensorProduct): Extend `baseChange_ext` to work over a free module This PR continues the work from #21814. Original PR: https://github.com/leanprover-community/mathlib4/pull/21814 t-algebra WIP
label:t-algebra$
105/5 Mathlib/LinearAlgebra/Basis/Bilinear.lean,Mathlib/LinearAlgebra/QuadraticForm/TensorProduct.lean 2 2 ['github-actions', 'mans0954'] nobody
93-23338
3 months ago
96-27469
3 months ago
0-0
0 seconds
26283 kckennylau
author:kckennylau
(WIP) Resultant --- This is a WIP PR for resultant for me to get cache. PRs produced: * [x] #25139 (migrated to #26091) * [x] #25270 * [x] #25279 * [x] #25293 * [x] #25294 * [x] #25305 * [x] #26285 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra WIP
label:t-algebra$
1190/0 Mathlib.lean,Mathlib/Algebra/Polynomial/Resultant/Basic.lean,Mathlib/Algebra/Polynomial/Resultant/MvPolynomial.lean,Mathlib/RingTheory/Polynomial/Discriminant.lean 4 1 ['github-actions'] nobody
93-7869
3 months ago
102-81686
3 months ago
0-19
19 seconds
26743 grunweg
author:grunweg
WIP: product rule for Lie bracket on manifolds On the path towards geodesics and the Levi-Civita connection. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry WIP 119/22 Mathlib/Geometry/Manifold/VectorField/LieBracket.lean,Mathlib/Geometry/Manifold/VectorField/Pullback.lean 2 1 ['github-actions'] nobody
91-26025
2 months ago
91-47499
2 months ago
0-1
1 second
16303 grunweg
author:grunweg
feat(CI): check for badly formatted titles or missing/contradictory labels --- The zulip workflow is entirely cargo-culted from #16296; please review carefully. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI awaiting-author 325/0 .github/build.in.yml,Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/ValidatePRTitle.lean,MathlibTest/ValidatePRTitle.lean,lakefile.lean,scripts/README.md,scripts/check-title-labels.lean 8 44 ['Command-Master', 'adomani', 'bryangingechen', 'edegeltje', 'github-actions', 'grunweg', 'joneugster', 'leanprover-community-bot-assistant'] bryangingechen
assignee:bryangingechen
90-83876
2 months ago
90-83876
2 months ago
78-54824
78 days
20784 eric-wieser
author:eric-wieser
fix: prevent `exact?` recursing forever on `n = 55` Test case thanks to @llllvvuu: ```lean import Mathlib.SetTheory.Ordinal.Basic theorem natCast_inj {m n : ℕ} : (m : Ordinal) = n ↔ m = n := sorry example (n : Nat) : n = 55 := by exact? ``` This is surely a workaround for some unreported lean bug. The bug still exists for `n = 71` or higher, so we can still track down the bug after merging this patch. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 22/3 Mathlib/SetTheory/Ordinal/Basic.lean,MathlibTest/LibrarySearchRecDepth.lean 2 15 ['Command-Master', 'eric-wieser', 'github-actions', 'kbuzzard', 'kim-em', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
90-51397
2 months ago
90-51432
2 months ago
123-38699
123 days
26561 b-mehta
author:b-mehta
feat(LiminfLimsup): liminf of an antitone function is its supremum --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #26560 t-topology 24/0 Mathlib/Topology/Order/LiminfLimsup.lean 1 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
89-27425
2 months ago
89-27636
2 months ago
0-6
6 seconds
26449 faenuccio
author:faenuccio
feat(NumberTheory/LocalFields/Basic): provide the definition of (valued) Local Field In this PR we give the first definition of a local field, scoped in the namespace `Valued`, as a field endowed with a `Valued` structure such that the valuation is discrete, it is complete with respect to the topology induced by the valuation, and the residue field is finite. In future PR's we'll provide an analogous charcterizations (in purely topological terms) and the theory of extensions of local fields. A first version was in #23730, now closed. Co-authored-by: María Inés de Frutos-Fernández @mariainesdff - [x] depends on: #23727 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-number-theory WIP
label:t-algebra$
78/0 Mathlib.lean,Mathlib/NumberTheory/LocalFields/Basic.lean 2 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
88-63957
2 months ago
88-63964
2 months ago
0-91
1 minute
26878 adomani
author:adomani
feat: declaration diff script in Lean Although, it is still text-based, the parsing of the output of `git diff` is now done in Lean. The new script already performed better than the old one in a couple of situations: * #26877 See [this comment](https://github.com/leanprover-community/mathlib4/pull/26847#issuecomment-3045308885) * #26849 See [this comment](https://github.com/leanprover-community/mathlib4/pull/26849#issuecomment-3045092965) --- This is still work in progress: the parsing should be more or less done, but I have not yet hooked this into the action workflow. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 497/0 scripts/DeclarationDiff_text_based.lean 1 4 ['adomani', 'bryangingechen', 'github-actions'] bryangingechen
assignee:bryangingechen
87-65924
2 months ago
88-29475
2 months ago
0-0
0 seconds
26990 joelriou
author:joelriou
feat(CategoryTheory/Abelian): Noetherian objects form a Serre class This PR continues the work from #22367. Original PR: https://github.com/leanprover-community/mathlib4/pull/22367 t-category-theory WIP 311/14 Mathlib.lean,Mathlib/CategoryTheory/Abelian/SerreClass/NoetherianObject.lean,Mathlib/CategoryTheory/Abelian/Subobject.lean,Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/CategoryTheory/Subobject/MonoOver.lean 5 1 ['github-actions'] nobody
84-58169
2 months ago
84-58188
2 months ago
0-45
45 seconds
26994 Paul-Lez
author:Paul-Lez
feat(Topology/MetricSpace/Pseudo/Defs): add easy lemma about opens in topological spaces Split from #26992 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology easy awaiting-author 9/0 Mathlib/Topology/MetricSpace/Pseudo/Defs.lean 1 4 ['Paul-Lez', 'github-actions', 'grunweg'] nobody
84-44581
2 months ago
84-46003
2 months ago
0-11233
3 hours
27069 FrankieNC
author:FrankieNC
feat(Analysis/MetricSpace/HausdorffDimension): prove dimH of intervals and segments is 1 Add theorems `dimH_Icc01` and `dimH_segment` showing that the Hausdorff dimension of the unit interval [0,1] and of any non-degenerate real segment is 1. The key idea is that the segment is the image of [0,1] under a bi-Lipschitz map. We explicitly construct this map and prove it is both Lipschitz and antilipschitz, allowing us to transfer the dimension result from the unit interval. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology awaiting-author 63/0 Mathlib/Topology/MetricSpace/HausdorffDimension.lean 1 10 ['AntoineChambert-Loir', 'FrankieNC', 'github-actions', 'grunweg'] nobody
82-25014
2 months ago
82-37498
2 months ago
0-13398
3 hours
27135 JovanGerb
author:JovanGerb
feat: `gconvert` tactic The `gconvert` tactic calls `gcongr` internally, and it can be used as replacement/generalization of `peel`. One drawback is that `peel` can unfold definitions until they are a binder, while `gconvert` cannot, but I think this is acceptable. TODO: replace all uses of `peel` with either `gconvert` or `congr!` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 320/17 Mathlib/Tactic/GCongr/Core.lean,MathlibTest/GConvert.lean 2 1 ['github-actions'] nobody
81-43696
2 months ago
81-43696
2 months ago
0-0
0 seconds
27206 grhkm21
author:grhkm21
feat(CategoryTheory/Adjunction): partial adjoints are adjoints Partial adjunctions `F.partial{Left,Right}Adjunction` are adjunctions when fully defined i.e. `F.{left,right}AdjointObjIsDefined = ⊤`. t-category-theory 48/2 Mathlib/CategoryTheory/Adjunction/PartialAdjoint.lean 1 1 ['github-actions'] nobody
79-54366
2 months ago
79-54384
2 months ago
79-54413
79 days
18230 digama0
author:digama0
feat(Tactic/ScopedNS): extend `scoped[NS]` to more commands refactor `ScopedNS` to remove error prone repetitiveness and extend it to other commands such as `syntax`, `macro`, `elab`, etc. Co-authored-by: Jon Eugster --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author 201/26 Mathlib/Tactic/ScopedNS.lean,MathlibTest/scopedNS.lean 2 7 ['adomani', 'digama0', 'eric-wieser', 'github-actions', 'joneugster', 'kbuzzard'] nobody
78-59060
2 months ago
221-58565
7 months ago
41-32344
41 days
26962 themathqueen
author:themathqueen
feat(Data/Nat/Fib/Basic): some API for `Nat.fib` Added some helpful lemmas for `Nat.fib`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor awaiting-author 24/0 Mathlib/Data/Nat/Fib/Basic.lean 1 7 ['Ruben-VandeVelde', 'github-actions', 'themathqueen', 'vihdzp'] nobody
77-27556
2 months ago
77-27557
2 months ago
8-31586
8 days
27187 Komyyy
author:Komyyy
feat: `NONote` represents ordinals < ε₀ --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory WIP 186/12 Mathlib/SetTheory/Ordinal/Notation.lean 1 2 ['github-actions', 'vihdzp'] nobody
74-9720
2 months ago
80-168
2 months ago
0-2
2 seconds
27330 BoltonBailey
author:BoltonBailey
feat(Tactic/Linter): add TacticMs for natural subtraction and division This is a (pair of) short tactic scripts I wrote for Project Numina while vetting formal formal statements (thanks to [this guide](https://github.com/mirefek/lean-tactic-programming-guide) for the primer). The scripts check for the presence of natural subtraction and natural division, which can often lead to mistakes. Of course, Mathlib allows natural subtraction freely, so it's not obvious this could be made useful to Mathlib itself. Still, maybe it's of use to some other project, so I'll leave it here. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter 66/0 Mathlib/Tactic/Linter/TruncatedNat.lean 1 2 ['BoltonBailey', 'eric-wieser', 'github-actions'] nobody
74-3185
2 months ago
74-23510
2 months ago
0-0
0 seconds
26803 bjoernkjoshanssen
author:bjoernkjoshanssen
feat: second partial derivatives test We prove that if `f` is a real-valued function on `n`-dimensional Euclidean space with vanishing gradient at `x₀`, having a power series on a ball of positive radius around `x₀`, whose second Frechét derivative is positive definite at `x₀`, then `f` has local minimum at `x₀`. This project was started at the Lean for Mathematicians workshop hosted by the Simons Foundation in June 2025 in a group consisting of Bjørn Kjos-Hanssen, Erin Griffin, Asaf Kapota, and Janani Lakshmanan, see repo at https://github.com/bjoernkjoshanssen/secondpartial --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 325/0 Mathlib.lean,Mathlib/Analysis/Calculus/PartialDerivativeTest.lean 2 11 ['bjoernkjoshanssen', 'github-actions', 'j-loreaux', 'themathqueen'] nobody
73-78773
2 months ago
84-85532
2 months ago
5-11006
5 days
12006 adomani
author:adomani
feat: the `suffa` tactic The `suffa` tactic. `suffa tac` runs the tactic sequence `tac` and returns a `Try this:` suggestion of the form `suffices [target_after_tac] by tac; assumption`. For example ```lean example {m n : Nat} (h : m = n) : 0 + m = n := by suffa rewrite [Nat.zero_add] assumption ``` suggests the replacement ```lean example {m n : Nat} (h : m = n) : 0 + m = n := by suffices m = n by rewrite [Nat.zero_add] assumption assumption ``` See [this thread](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Try.20this.3A.20suffices.20simpa) as well as [this message](https://leanprover.zulipchat.com/#narrow/stream/144837-PR-reviews/topic/.2311822.20flexible.20tactics.20linter/near/431895664). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author 161/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Suffa.lean,test/Suffa.lean 4 3 ['MoritzBeroRoos', 'YaelDillies'] nobody
72-34147
2 months ago
484-56387
1 year ago
58-85902
58 days
27435 callesonne
author:callesonne
feat(Normed/Algebra/Logarithm): add FormalMultilinearSeries of logarithm around `1` This PR adds the `FormalMultilinearSeries` corresponding to `log` around `1` (or rather, corresponding to `log(1 + x)`. For now, this PR just adds the definition, and copies over as many (easy) results as possible from the corresponding exponential file. In a follow up PR, we will add a criterion for when the logarithm converges on the unit disk (based on the growth of the inverse norms of naturals in the given algebra), and show that this holds for any Q_p algebra. This work has been done as part of the workshop "Formalizing Class Field Theory" in Oxford. Since much of this is copy-pasting the Exponential file, I have kept Anatole Dedecker and Eric Wieser as coauthors. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis WIP 311/0 Mathlib/Analysis/Normed/Algebra/Logarithm.lean 1 1 ['github-actions'] nobody
71-40293
2 months ago
71-40631
2 months ago
0-29
29 seconds
26393 winstonyin
author:winstonyin
feat: solutions to $C^n$ vector fields are $C^n$ in time I prove that solutions to $C^n$ vector fields are also $C^n$ in time, where $n ≤ \infty$. This PR continues the work from #21286. --- - [x] depends on: #26392 [technically only depends on #26382 but I'm writing these as incremental PRs] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-dynamics t-analysis awaiting-author 93/2 Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/ODE/PicardLindelof.lean 2 19 ['github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'winstonyin'] grunweg
assignee:grunweg
70-67071
2 months ago
70-67071
2 months ago
2-8489
2 days
27434 plp127
author:plp127
test: `AlgEquiv.inv_apply` For testing a new `@[simp]` lemma. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
20/1 Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/FieldTheory/KrullTopology.lean 4 6 ['eric-wieser', 'github-actions', 'plp127'] nobody
70-58477
2 months ago
71-40757
2 months ago
0-0
0 seconds
21915 YaelDillies
author:YaelDillies
feat: simproc for `Int.divisorsAntidiag` Co-authored-by: Paul Lezeau --- - [x] depends on: #21912 - [x] depends on: #21991 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta WIP 73/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Simproc/DivisorsAntidiag.lean 3 8 ['YaelDillies', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
70-47524
2 months ago
70-47543
2 months ago
0-260
4 minutes
26196 adomani
author:adomani
fix: silence commandStart on attribute This is only a temporary fix, the linter should be able to ignore more granularly individual attributes. Note: this PR is prompted by "future" changes to mathlib and may not be needed after all! See [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/commandStart.20linter.20broken.20with.20.60grind.60/with/524980336) and also [#mathlib4 > `grind` is available. What should Mathlib users expect? @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.60grind.60.20is.20available.2E.20What.20should.20Mathlib.20users.20expect.3F/near/526547091) and [lean4#9128](https://github.com/leanprover/lean4/pull/9128) that should be the final attempt to resolve pretty-printing of `grind`, instead of silencing the linter. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter 9/0 Mathlib/Tactic/Linter/CommandStart.lean,MathlibTest/CommandStart.lean 2 3 ['adomani', 'github-actions', 'grunweg'] kim-em
assignee:kim-em
70-16642
2 months ago
105-76686
3 months ago
0-0
0 seconds
27507 grunweg
author:grunweg
wip(commandStart): check the indentation of declaration keywords also Check that e.g. a `lemma` keyword always starts on column 1 (unless preceded by an attribute). --- TODO: - make this work for other declarations also - the position reported for the lemma column is not helpful (it might be the absolute column in the file, but that's missing line information) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter WIP 84/1 Mathlib/Tactic/Linter/CommandStart.lean,MathlibTest/CommandStart.lean 2 2 ['github-actions', 'grunweg'] nobody
69-57526
2 months ago
69-57597
2 months ago
0-2
2 seconds
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. new-contributor t-algebra awaiting-author
label:t-algebra$
465/0 Mathlib.lean,Mathlib/Algebra/Polynomial/ZMod.lean 2 2 ['Ruben-VandeVelde', 'github-actions'] nobody
69-27110
2 months ago
69-27110
2 months ago
25-6199
25 days
25945 adomani
author:adomani
feat: the empty line in commands linter This linter flags empty lines within a command. It allows empty lines within doc-strings, module-docs and a couple of other "sensible" places. It also skips files that are likely to contain meta-code, since there the use of empty lines in definition is more widespread. This PR continues the work from #25236. large-import t-linter maintainer-merge awaiting-author 375/7 Mathlib.lean,Mathlib/Analysis/Meromorphic/FactorizedRational.lean,Mathlib/CategoryTheory/Comma/StructuredArrow/CommaMap.lean,Mathlib/Init.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/LowDegree.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/EmptyLine.lean,MathlibTest/EmptyLine.lean 8 12 ['adomani', 'bryangingechen', 'eric-wieser', 'github-actions'] bryangingechen
assignee:bryangingechen
67-45839
2 months ago
67-45839
2 months ago
42-26074
42 days
22464 adomani
author:adomani
feat(CI): declarations diff in Lean Rewrites the `declaration_diff` script in Lean. You can see the effect of the new script in the testing branch #22497. The new CI step runs in approximately 5mins, but is separate from the `build` step. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI awaiting-author 151/0 .github/workflows/PR_summary_lean.yml,scripts/README.md,scripts/declarations_diff.lean,scripts/declarations_diff_lean_shell_glue.sh 4 7 ['bryangingechen', 'github-actions', 'grunweg', 'j-loreaux'] robertylewis
assignee:robertylewis
67-13167
2 months ago
67-13167
2 months ago
146-23504
146 days
27422 vihdzp
author:vihdzp
feat: relate images to pointwise negation/inverses These lemmas kept coming up in the CGT repo. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data t-algebra awaiting-author
label:t-algebra$
13/0 Mathlib/Algebra/Group/Pointwise/Set/Basic.lean 1 7 ['YaelDillies', 'github-actions', 'vihdzp'] nobody
67-423
2 months ago
67-423
2 months ago
4-29607
4 days
26307 j-loreaux
author:j-loreaux
refactor: make `IsIdempotentElem` a one-field structure --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra
label:t-algebra$
29/22 Mathlib/Algebra/Group/Idempotent.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/GroupWithZero/Idempotent.lean,Mathlib/Algebra/Ring/BooleanRing.lean,Mathlib/Algebra/Ring/Idempotent.lean 5 1 ['github-actions'] nobody
66-32064
2 months ago
102-42604
3 months ago
0-0
0 seconds
27677 jkpjkpjkp
author:jkpjkpjkp
extend tactic `observe` as syntax sugar for `grind` --- The `observe` tactic now attempts to use the `grind` tactic as a fallback when library search (exact?) fails. cc. https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/.22Missing.20Tactics.22.20list/near/531764184 this drafty version does not update doc or `observe?`, as details and decisions may need further discussion. new-contributor t-meta 31/8 Mathlib/Tactic/Observe.lean 1 2 ['euprunin', 'github-actions'] nobody
64-25742
2 months ago
65-58990
2 months ago
0-0
0 seconds
27297 hugh-fox
author:hugh-fox
feat: add an equality between sums and products of cartesian products Adds `prod_mul_eq_prod_product` and a version for Finsets `prod_range_mul_eq_prod_product` with to show an equality between `Fin (i * j)` and `Fin a × Fin b`. It is likely `prod_range_mul_eq_prod_product` belongs in a different file, in which case only the first commit should be considered. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra awaiting-author
label:t-algebra$
12/0 Mathlib/Algebra/BigOperators/Fin.lean 1 6 ['Ruben-VandeVelde', 'github-actions', 'hugh-fox', 'j-loreaux', 'kckennylau'] nobody
65-27634
2 months ago
69-19622
2 months ago
7-6727
7 days
25864 plp127
author:plp127
feat(Nat/Digits): use fuel in `Nat.digits` Add a `fuel` parameter to `Nat.digitsAux` to make it structurally recursive. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 47/14 Mathlib/Data/Nat/Digits/Defs.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] ericrbg
assignee:ericrbg
65-27172
2 months ago
76-17848
2 months ago
96-64400
96 days
27704 vihdzp
author:vihdzp
feat: link `Minimal` and `IsLeast` together --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author 24/0 Mathlib/Order/Bounds/Basic.lean 1 3 ['b-mehta', 'github-actions'] nobody
64-51939
2 months ago
64-51939
2 months ago
0-52136
14 hours
14237 js2357
author:js2357
feat: Define the localization of a fractional ideal at a prime ideal Define the localization of a fractional ideal at a prime ideal, and prove some basic properties. --- This PR is part 3 out of 4 of a proof of `isDedekindDomain_iff_isDedekindDomainDvr`. Part 4 is available here: #14242 - [x] depends on: #14099 Part 1 - [x] depends on: #14216 Part 2 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra awaiting-author
label:t-algebra$
230/0 Mathlib.lean,Mathlib/RingTheory/FractionalIdeal/LocalizedAtPrime.lean,Mathlib/RingTheory/Localization/Basic.lean 3 21 ['Vierkantor', 'YaelDillies', 'github-actions', 'js2357', 'kbuzzard', 'leanprover-community-bot-assistant', 'leanprover-community-mathlib4-bot'] Vierkantor
assignee:Vierkantor
64-37436
2 months ago
64-37468
2 months ago
26-39463
26 days
27756 grunweg
author:grunweg
feat: `Weak(Pseudo)EMetricSpace`, generalises `(Pseudo)EMetricSpace` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) carleson t-topology WIP 142/36 Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/Instances/ENNReal/Lemmas.lean 2 1 ['github-actions'] nobody
64-20349
2 months ago
64-41918
2 months ago
0-2
2 seconds
27066 vasnesterov
author:vasnesterov
feat(Tactic/Order): frontend for `order` * Support `order [h1, h2]` and `order only [h1, h2]` syntax. * Split conjunctions while extracting facts from the context. E.g. hypotheses in the form `A ∧ B` are converted into two facts `A` and `B`. * Similarly, extract facts from existential quantifiers in the hypotheses. --- - [x] depends on: #26354 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This PR continues the work from #22073. Original PR: https://github.com/leanprover-community/mathlib4/pull/22073 t-meta 91/37 Mathlib.lean,Mathlib/Tactic/Linarith/Frontend.lean,Mathlib/Tactic/Order.lean,Mathlib/Tactic/Order/CollectFacts.lean,Mathlib/Util/ElabWithoutMVars.lean,MathlibTest/order.lean 6 22 ['JovanGerb', 'github-actions', 'mathlib4-dependent-issues-bot', 'vasnesterov'] alexjbest
assignee:alexjbest
64-17643
2 months ago
82-63970
2 months ago
82-63992
82 days
25989 Multramate
author:Multramate
feat(NumberTheory/EllipticDivisibilitySequence): add elliptic nets This PR continues the work from #25030. Original PR: https://github.com/leanprover-community/mathlib4/pull/25030 t-number-theory awaiting-author 259/37 Mathlib/NumberTheory/EllipticDivisibilitySequence.lean 1 8 ['MichaelStollBayreuth', 'Multramate', 'github-actions', 'tb65536'] tb65536
assignee:tb65536
64-16819
2 months ago
64-16819
2 months ago
45-1019
45 days
27813 javra
author:javra
feat: IMO 2025 Q1 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO WIP 882/0 Archive/Imo/Imo2025Q1.lean 1 1 ['github-actions'] nobody
63-55720
2 months ago
63-56918
2 months ago
0-14
14 seconds
22366 kim-em
author:kim-em
feat: `check_equalities` tactic for diagnosing defeq problems The `check_equalities` tactic, which checks the typing of equalities in the goal, reporting discrepancies between the implicit type argument of the equality, and the inferred types of the left and right hand sides, at "instances and reducible" transparency. Reports from this tactic do not necessarily indicate a problem, although typically `simp` should reduce rather than increase the reported discrepancies. `check_equalities` may be useful in diagnosing uses of `erw`. t-meta delegated 118/3 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Basic.lean,Mathlib/Tactic/CategoryTheory/CheckCompositions.lean,Mathlib/Tactic/CheckEqualities.lean,Mathlib/Tactic/Common.lean,MathlibTest/check_equalities.lean 7 16 ['adomani', 'b-mehta', 'eric-wieser', 'github-actions', 'grunweg', 'kim-em', 'mathlib-bors'] nobody
63-50856
2 months ago
203-43425
6 months ago
15-14325
15 days
27683 dupuisf
author:dupuisf
feat: grind tags for set operations This PR adds `grind` tags for various set operations (union, intersection, complement, etc). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 29/9 Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Operations.lean 2 4 ['dupuisf', 'euprunin', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
63-44856
2 months ago
63-44886
2 months ago
65-17969
65 days
27753 YunkaiZhang233
author:YunkaiZhang233
feat(CategoryTheory): implemented proofs for factorisation categories being equivalent to iterated comma categories in two ways --- Completed one of the tasks in TODOs, shown and implemented the details for (X/C)/f ≌ Factorisation f ≌ f/(C/Y). This is migrated from my previous PR #22390 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory awaiting-author 70/1 Mathlib/CategoryTheory/Category/Factorisation.lean 1 12 ['YunkaiZhang233', 'b-mehta', 'github-actions', 'robin-carlier'] nobody
63-44837
2 months ago
64-40718
2 months ago
0-3448
57 minutes
25481 kbuzzard
author:kbuzzard
chore: refactor Algebra.TensorProduct.rightAlgebra The declaration `Algebra.TensorProduct.rightAlgebra` makes `A ⊗[R] B` into a `B`-algebra (here `R` is a `CommSemiring`, `A` is a `Semiring` and an `R`-algebra, and `B` is a `CommSemiring` and an `R`-algebra). It is not an instance because if A = B it causes a diamond. However in the many cases where A isn't B, it can occasionally be useful. However one could imagine that in the many cases where an R-module `M` also isn't `B`, it might occasionally be useful to make `M ⊗[R] B` into a `B`-module (and indeed I am finding this in FLT). With the current definition of `Algebra.TensorProduct.rightAlgebra` this is difficult to do without causing diamonds in the case when `M` happens to be an `R`-algebra (by which I mean "I failed to do this in finite time"). One fix for this is just to redefine `Algebra.TensorProduct.rightAlgebra` so that the `smul` field is ``` smul b ab := TensorProduct.comm _ _ _ (b • (TensorProduct.comm _ _ _ ab)) ``` i.e. literally "swap the product around, use mathlib's instance making `B ⊗[R] A` into a `B`-algebra, and then swap back". Then the same definition can be used to make `M ⊗[R] B` into a `B`-module and on the odd occasion where this point of view is useful, there is no diamond. This is what we do in this PR. After adding one simp lemma there is no breakage at all in mathlib. Furthermore, for those who have observed that we want to build on this algebra instance sometimes and, for example, add instances of the form "if M is finite over R then M ⊗[R] B is finite over B" -- these instances are really easy to add now with this new definition, because you simply pull back the analogous finite left module instance along the isomorphism M ⊗[R] B = B ⊗[R] M. Examples (from FLT, where the right action is put in a scope): ``` scoped instance [Module.Finite R M] : Module.Finite A (M ⊗[R] A) := Module.Finite.equiv (Module.TensorProduct.comm R A M) scoped instance [Module.Free R M] : Module.Free A (M ⊗[R] A) := Module.Free.of_equiv (Module.TensorProduct.comm R A M) ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra delegated
label:t-algebra$
33/6 Mathlib/RingTheory/TensorProduct/Basic.lean 1 7 ['adomani', 'github-actions', 'kbuzzard', 'leanprover-bot', 'mathlib-bors'] adomani
assignee:adomani
63-43049
2 months ago
63-50178
2 months ago
56-85445
56 days
27826 Louddy
author:Louddy
feat(Subsemiring): mk_eq_zero Add a `mk_eq_zero` lemma for `Subsemiring`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra WIP
label:t-algebra$
4/0 Mathlib/Algebra/Ring/Subsemiring/Defs.lean 1 3 ['Louddy', 'eric-wieser', 'github-actions'] nobody
63-37202
2 months ago
63-40284
2 months ago
0-8982
2 hours
25758 YaelDillies
author:YaelDillies
chore: shortcut instance `CompleteLattice α → PartialOrder α` This avoids using the path `CompleteLattice α → CompletePartialOrder α → PartialOrder α` that goes through `Order.CompletePartialOrder` and makes it appear used to our automation, such as `shake` or `#min_imports`. This is a followup to #25358. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 7/0 Mathlib/Order/CompleteLattice/Defs.lean 1 6 ['Ruben-VandeVelde', 'eric-wieser', 'github-actions', 'leanprover-bot'] bryangingechen
assignee:bryangingechen
63-8005
2 months ago
94-15745
3 months ago
113-66323
113 days
27050 BoltonBailey
author:BoltonBailey
doc(Control/Monad/Cont): add docstrings Split of #25917. Adds docstrings to this file. Note: this documentation was written by asking Cursor (Claude 3.5 sonnet) to write the docstrings. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-author 183/0 Mathlib/Control/Monad/Cont.lean 1 8 ['BoltonBailey', 'eric-wieser', 'github-actions'] nobody
62-86130
2 months ago
82-17413
2 months ago
0-85623
23 hours
25916 BoltonBailey
author:BoltonBailey
feat: add `simp` lemma `coeff_eq_zero_of_not_mem_support` Adds the forward direction of `not_mem_support_iff` as a simp lemma. Original PR: https://github.com/leanprover-community/mathlib4/pull/13026 t-algebra awaiting-author
label:t-algebra$
4/0 Mathlib/Algebra/MvPolynomial/Basic.lean 1 2 ['BoltonBailey', 'github-actions'] nobody
62-40854
2 months ago
110-41740
3 months ago
0-8
8 seconds
27225 eric-wieser
author:eric-wieser
refactor(Tactic/Lift): deprecate the third with argument We already have a number of tactics where the clearing happens all the time, and you have to opt out with `id h`. This also fixes a bug where `lift z to Nat with n hn this_is_unused` would silently ignore `this_is_unused`. --- - [ ] depends on: #27223 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author 21/9 Mathlib/Tactic/Lift.lean,MathlibTest/lift.lean 2 8 ['JovanGerb', 'adomani', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'vihdzp'] JovanGerb
assignee:JovanGerb
62-3221
2 months ago
62-50121
2 months ago
15-64386
15 days
26061 kckennylau
author:kckennylau
feat(AlgebraicGeometry): define Projective Space This defines the projective space over a scheme, indexed by an arbitrary type. --- Zulip discussion: [#maths > Projective Space](https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Projective.20Space/with/524057860) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry 63/0 Mathlib.lean,Mathlib/AlgebraicGeometry/ProjectiveSpace.lean 2 14 ['callesonne', 'erdOne', 'github-actions', 'kckennylau'] erdOne
assignee:erdOne
61-7979
2 months ago
108-9720
3 months ago
108-9760
108 days
27703 vihdzp
author:vihdzp
feat: `le_of_forall_ne` This form of `le_of_forall_lt` is a bit nicer when working with nimbers; they're minimum excludents, so to prove `a ≤ b` you have to prove `b` can't be equal to any smaller `a`! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order easy awaiting-author 7/0 Mathlib/Order/Basic.lean 1 6 ['JovanGerb', 'eric-wieser', 'github-actions'] nobody
61-7367
2 months ago
61-13252
2 months ago
4-6136
4 days
26347 mans0954
author:mans0954
feature(Data/Finset/RangeDistance): abs_sub_lt_of_mem_finset_range This PR continues the work from #23161. Original PR: https://github.com/leanprover-community/mathlib4/pull/23161 t-data 30/0 Mathlib.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Data/Finset/RangeDistance.lean 3 2 ['github-actions', 'mans0954'] alreadydone
assignee:alreadydone
60-61381
1 month ago
60-61381
1 month ago
101-70788
101 days
26341 mans0954
author:mans0954
feat(LinearAlgebra/QuadraticForm/Basis): Free Tensor product of Quadratic Maps This PR continues the work from #19432. Original PR: https://github.com/leanprover-community/mathlib4/pull/19432 large-import t-algebra WIP
label:t-algebra$
888/0 Mathlib.lean,Mathlib/Data/Sym/Sym2/Prod.lean,Mathlib/LinearAlgebra/QuadraticForm/Basis.lean 3 n/a ['github-actions', 'mans0954'] nobody
60-61372
1 month ago
unknown
unknown
26340 mans0954
author:mans0954
feat(Algebra/Module/NestAlgebra): Nest algebras This PR continues the work from #18705. Original PR: https://github.com/leanprover-community/mathlib4/pull/18705 t-algebra
label:t-algebra$
184/0 Mathlib.lean,Mathlib/Algebra/Module/NestAlgebra.lean,Mathlib/Order/Nest.lean,Mathlib/Order/Preorder/Chain.lean,docs/references.bib 5 2 ['github-actions', 'mans0954'] nobody
60-61368
1 month ago
60-61368
1 month ago
101-72299
101 days
26298 adomani
author:adomani
test: the commandStart linter only acts on modified files. Test for #26299: should flag issues in the new file and also in the modified file `Mathlib/Data/Array/Extract.lean`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter awaiting-author WIP 63/1 Mathlib.lean,Mathlib/Data/Array/Extract.lean,Mathlib/New.lean,Mathlib/Tactic/Linter/CommandStart.lean 4 20 ['adomani', 'bryangingechen', 'github-actions'] nobody
60-61329
1 month ago
60-61330
1 month ago
0-0
0 seconds
25992 Multramate
author:Multramate
feat(RingTheory/Ideal/Span): add pair lemmas This PR continues the work from #25323. Original PR: https://github.com/leanprover-community/mathlib4/pull/25323 t-ring-theory awaiting-author 131/31 Mathlib/Algebra/Module/PID.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Span.lean 5 9 ['Multramate', 'Ruben-VandeVelde', 'github-actions'] nobody
60-61290
1 month ago
60-61290
1 month ago
39-76045
39 days
25986 Multramate
author:Multramate
feat(AlgebraicGeometry/EllipticCurve/NumberField/Height): define heights on Weierstrass curves This PR continues the work from #15786. Original PR: https://github.com/leanprover-community/mathlib4/pull/15786 t-algebraic-geometry 650/0 Mathlib/AlgebraicGeometry/EllipticCurve/NumberField/Height.lean 1 2 ['Multramate', 'github-actions'] nobody
60-61278
1 month ago
60-61278
1 month ago
0-0
0 seconds
26342 mans0954
author:mans0954
WiP: Expansion of the tensor product of quadratic maps over a linear combination This PR continues the work from #19806. Original PR: https://github.com/leanprover-community/mathlib4/pull/19806 t-algebra WIP
label:t-algebra$
483/0 Mathlib/Data/Sym/Sym2/Prod.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/QuadraticForm/Basis.lean,Mathlib/LinearAlgebra/QuadraticForm/TensorProduct.lean 4 n/a ['github-actions', 'mans0954'] nobody
60-61216
1 month ago
unknown
unknown
26158 upobir
author:upobir
feat(NumberTheory/Divisors): add int divisors This PR continues the work from #25209. Original PR: https://github.com/leanprover-community/mathlib4/pull/25209 t-number-theory awaiting-author 101/4 Mathlib/NumberTheory/Divisors.lean 1 36 ['MichaelStollBayreuth', 'github-actions', 'upobir'] mariainesdff
assignee:mariainesdff
60-46664
1 month ago
60-46664
1 month ago
46-1067
46 days
26483 metakunt
author:metakunt
feat (RingTheory/RootsOfUnity/PrimitiveRoots) : Add equiv_primitiveRoots_of_coprimePow Adds equivalence of r-th primitive roots by a coprime e. t-ring-theory new-contributor awaiting-author 79/0 Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean 1 13 ['Citronhat', 'Ruben-VandeVelde', 'github-actions', 'metakunt'] nobody
59-63538
1 month ago
59-63538
1 month ago
28-81831
28 days
26386 jjdishere
author:jjdishere
feat(RingTheory/Perfection): lemmas for `frobeniusEquiv.symm` This PR continues the work from #22330. Original PR: https://github.com/leanprover-community/mathlib4/pull/22330 t-ring-theory 321/5 Mathlib.lean,Mathlib/Algebra/Ring/Aut.lean,Mathlib/FieldTheory/Perfect.lean,Mathlib/RingTheory/Perfection.lean,Mathlib/RingTheory/Perfectoid/Untilt.lean,Mathlib/RingTheory/WittVector/Basic.lean,Mathlib/RingTheory/WittVector/Complete.lean,Mathlib/RingTheory/WittVector/TeichmullerSeries.lean 8 7 ['eric-wieser', 'github-actions', 'jjdishere'] nobody
59-63478
1 month ago
59-63478
1 month ago
101-329
101 days
26368 Whysoserioushah
author:Whysoserioushah
feat(RingTheory/TwoSidedIdeal/SpanAsSum): span of set as finsum Co-authored-by: Jujian Zhang --- Reopened after everything moved to fork (#23320). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author 81/0 Mathlib.lean,Mathlib/RingTheory/TwoSidedIdeal/SpanAsSum.lean 2 5 ['github-actions', 'kckennylau'] YaelDillies
assignee:YaelDillies
59-63454
1 month ago
59-63454
1 month ago
37-40835
37 days
26387 jjdishere
author:jjdishere
feat(RingTheory/WittVector): the Teichmuller series This PR continues the work from #22320. Original PR: https://github.com/leanprover-community/mathlib4/pull/22320 t-ring-theory awaiting-author 204/2 Mathlib.lean,Mathlib/Algebra/Ring/Aut.lean,Mathlib/FieldTheory/Perfect.lean,Mathlib/RingTheory/WittVector/Basic.lean,Mathlib/RingTheory/WittVector/Complete.lean,Mathlib/RingTheory/WittVector/TeichmullerSeries.lean 6 2 ['github-actions', 'jjdishere'] nobody
59-63411
1 month ago
59-63411
1 month ago
0-87
1 minute
26054 FMLJohn
author:FMLJohn
feat(RingTheory/GradedAlgebra/Homogeneous/Subsemiring): homogeneous subsemirings of a graded semiring --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) In this pull request, we have defined homogeneous subsemirings of `GradedRing 𝒜` where `𝒜 : ι → σ`, `SetLike σ A` and `AddSubmonoidClass σ A`. ## Main definitions For any `R : Subsemiring A`: * `Subsemiring.IsHomogeneous 𝒜 R`: The property that a subsemiring is closed under `GradedRing.proj`. * `HomogeneousSubsemiring 𝒜`: The structure extending subsemirings which satisfy `Subsemiring.IsHomogeneous`. t-ring-theory 120/0 Mathlib.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Subsemiring.lean 2 1 ['github-actions'] kim-em
assignee:kim-em
59-63325
1 month ago
59-63325
1 month ago
108-32039
108 days
24730 YaelDillies
author:YaelDillies
feat(RingTheory): group-like elements Define group-like elements in a bialgebra, ie elements such that `η a = 1` and `Δ a = a ⊗ₜ a`. We prove that group-like elements of a coalgebra over a domain are linearly independent, group-like elements of a bialgebra form a monoid, group-like elements of a Hopf algebra form a group. From Toric Co-authored-by: Michał Mrugała --- - [x] depends on: #24747 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory toric 309/0 Mathlib.lean,Mathlib/RingTheory/Bialgebra/GroupLike.lean,Mathlib/RingTheory/Coalgebra/GroupLike.lean,Mathlib/RingTheory/HopfAlgebra/GroupLike.lean 4 42 ['Julian-Kuelshammer', 'Parcly-Taxel', 'Whysoserioushah', 'YaelDillies', 'erdOne', 'eric-wieser', 'github-actions', 'leanprover-bot', 'mathlib4-dependent-issues-bot', 'smorel394'] eric-wieser
assignee:eric-wieser
59-63219
1 month ago
59-63219
1 month ago
146-20270
146 days
14733 jjaassoonn
author:jjaassoonn
feat(RingTheory/Flat/CategoryTheory): a module is flat iff tensoring preserves finite limits --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author 99/1 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/RightExact.lean,Mathlib/RingTheory/Flat/CategoryTheory.lean 4 2 ['github-actions', 'kim-em'] nobody
59-63052
1 month ago
59-63052
1 month ago
6-6256
6 days
14727 jjaassoonn
author:jjaassoonn
feat(RingTheory/Flat/CategoryTheory): a flat module has vanishing higher Tor groups [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author 37/1 Mathlib/RingTheory/Flat/CategoryTheory.lean 1 3 ['github-actions', 'kim-em'] nobody
59-63040
1 month ago
59-63040
1 month ago
3-28223
3 days
27309 kckennylau
author:kckennylau
feat(CategoryTheory): a presheaf on `CostructuredArrow F d` can be extended to a presheaf on `C` --- Depends on: * [ ] #27321 Zulip: [#Is there code for X? > over category via a functor](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/over.20category.20via.20a.20functor/with/529574191) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory WIP 218/0 Mathlib.lean,Mathlib/CategoryTheory/Comma/Presheaf/LeftExtension.lean 2 3 ['erdOne', 'github-actions', 'robin-carlier'] erdOne
assignee:erdOne
59-59754
1 month ago
59-59775
1 month ago
15-69033
15 days
27976 smmercuri
author:smmercuri
feat: `ramificationIdx` for `NumberField.InfinitePlace` This PR continues the work from #24884. Original PR: https://github.com/leanprover-community/mathlib4/pull/24884 t-number-theory WIP 22/0 Mathlib/NumberTheory/NumberField/InfinitePlace/Ramification.lean 1 1 ['github-actions'] nobody
59-59540
1 month ago
59-59552
1 month ago
0-57
57 seconds
27417 PierreQuinton
author:PierreQuinton
feat: add `SigmaCompleteLattice` A $\sigma$-complete lattice is a lattice in which every countable subset `s` has a least upper bound and a greatest lower bound, denoted below by `sSup s` and `sInf s`. This PR adds the classes `SigmaCompleteLattice` as well as some theorems (mainly adapted from `CompleteLattice` and `ConditionallyCompleteLattice`). This is an adaptation of #26318 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author 394/0 Mathlib.lean,Mathlib/Order/SigmaCompleteLattice.lean 2 8 ['PierreQuinton', 'YaelDillies', 'github-actions', 'vihdzp'] YaelDillies
assignee:YaelDillies
59-38031
1 month ago
59-38031
1 month ago
12-33338
12 days
28032 grunweg
author:grunweg
feat: support Partial{Homeomorph,Equiv} in differential geometry elaborators --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry 852/0 Mathlib.lean,Mathlib/Geometry/Manifold/Elaborators.lean,Mathlib/Geometry/Manifold/Traces.lean,MathlibTest/DifferentialGeometry/Elaborators.lean,scripts/noshake.json 5 1 ['github-actions'] nobody
58-62014
1 month ago
58-62014
1 month ago
58-62076
58 days
23669 erdOne
author:erdOne
feat(FieldTheory): abelian extensions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra delegated
label:t-algebra$
74/0 Mathlib.lean,Mathlib/FieldTheory/Galois/Abelian.lean,Mathlib/NumberTheory/Cyclotomic/Gal.lean 3 16 ['acmepjz', 'alreadydone', 'chrisflav', 'erdOne', 'github-actions', 'mathlib-bors', 'riccardobrasca', 'xroblot'] riccardobrasca
assignee:riccardobrasca
58-51033
1 month ago
87-55273
2 months ago
29-68817
29 days
26770 Jun2M
author:Jun2M
feat(Combinatorics/Graph) : subgraph relations and operations on `Graph` This PR creates a new file `Combinatorics/Graph/Subgraph.lean`. In it, the PR introduces a partial order on graphs by subgraph relation, defines relations `IsInducedSubgraph`, `IsSpanningSubgraph` and `IsClosedSubgraph`. Further, it introduce operations `EdgeRestrict`, `EdgeDelete`, `induce` and `VertexDelete`. Co-authored-by: Peter Nelson --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 703/0 Mathlib.lean,Mathlib/Combinatorics/Graph/Subgraph.lean 2 1 ['github-actions'] awainverse
assignee:awainverse
58-7993
1 month ago
91-19471
2 months ago
91-19509
91 days
26765 KiringYJ
author:KiringYJ
feat(MeasureTheory/PiSystem): add π-λ theorem and SetLike instance Add two small features to `MeasureTheory/PiSystem`: 1. SetLike instance `instance : SetLike (DynkinSystem α) (Set α)` This lets us write `s ⊆ d` and `t ∈ d` for a DynkinSystem `d`, matching usual mathlib style. 2. `DynkinSystem.pi_lambda` lemma Classical π‑λ theorem: if a π‑system `s` is contained in a Dynkin system `d`, every set measurable for `σ(s)` is also in `d`. Currently, mathlib exposes this result only indirectly (e.g. via `generateFrom_eq`). Although logically equivalent, it is not obvious at first glance that those lemmas are the π‑λ theorem. The new lemma states the result in its familiar textbook form, so users can recognise and cite it immediately. Both pieces are under 10 lines, term‑mode only, and do not modify existing APIs. No breaking changes. No dependencies. new-contributor t-measure-probability 13/0 Mathlib/MeasureTheory/PiSystem.lean 1 13 ['EtienneC30', 'KiringYJ', 'github-actions', 'ocfnash'] RemyDegenne
assignee:RemyDegenne
57-7992
1 month ago
64-44041
2 months ago
91-31879
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. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 121/8 Mathlib.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/LawfulSupInf.lean 3 25 ['PierreQuinton', 'YaelDillies', 'github-actions', 'plp127', 'vihdzp'] YaelDillies
assignee:YaelDillies
56-58169
1 month ago
68-41466
2 months ago
68-41494
68 days
28075 tristan-f-r
author:tristan-f-r
chore(Finsupp/Indicator): make non-classical This was surprising to see on a data-carrying definition. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data easy awaiting-author 11/9 Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Data/Finsupp/Indicator.lean 2 3 ['github-actions', 'ocfnash', 'tristan-f-r'] nobody
56-21628
1 month ago
56-65447
1 month ago
0-85904
23 hours
25779 robin-carlier
author:robin-carlier
feat(CategoryTheory/Bicategory/NaturalTransformations): strong and lax natural transformations of lax functors Given two lax functors `F G` between bicategories, we define lax natural transformations as families of 1-morphisms `∀ a : B, F.obj a ⟶ G.obj a` equipped with a naturality 2-cell `∀ {a b : B} (f : a ⟶ b), app a ≫ G.map f ⟶ F.map f ≫ app b` that are required to satisfy conditions such as naturality, and compatibility with the `mapId` and `mapComp` fields of the source and target functors. This notion dualizes the existing notion of oplax natural transformations between, and tries to narrow the current gap between lax and oplax functors in the library, where the latter has much more formalized API. For maintainability, The code tries to stay as aligned as possible with the code in `CategoryTheory.Bicategory.Naturaltransformations.Oplax`. --- I followed the book by Johnson and Yau for the definition. I made @yuma-mizuno and @callesonne authors of the files, as they are the authors of the original code for Oplax functors, which I basically copy-pasted and modified to make it work with lax functors. They should feel free to modify this if they want. Next thing on the list is to tackle modifications between lax/strong natural transforms of lax transforms, as well as the category instance on lax functors. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #25565.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/25565* t-category-theory 286/0 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Lax.lean,scripts/noshake.json 3 3 ['github-actions', 'yuma-mizuno'] joelriou
assignee:joelriou
56-8011
1 month ago
90-69628
2 months ago
112-27989
112 days
27664 pechersky
author:pechersky
feat(Topology,Analysis): discrete topology metric space and normed groups Explicit construction of the discrete topology metric space and normed groups where `dist x y = 1` for all `x != y` Provide PseudoMetricSpace, MetricSpace, Seminormed(Add)Group, and Normed(Add)Group constructions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 137/0 Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Topology/MetricSpace/Basic.lean,Mathlib/Topology/MetricSpace/Pseudo/Constructions.lean 3 3 ['github-actions', 'kckennylau', 'pechersky'] urkud
assignee:urkud
56-8003
1 month ago
65-84415
2 months ago
65-84402
65 days
27525 Hagb
author:Hagb
(WIP) feat(Tactic/Linter/Indentation): add a linter for general indentation --- todo: - [x] check whether some (direct or indirect) children of some kinds of parents are intended _strictly_ deeper than this parent. For example: ```lean example : Nat := Nat.add 1 -- should be strictly deeper than `Nat.add`? 2 ``` - [ ] check whether some (direct or indirect) children of some kinds of parents are intended exactly N spaces deeper than this parent. For example: ```lean example : True := trivial -- should be exact 2 spaces deeper than 0 space of `example` ``` - [ ] some special cases, such as `calc`. https://github.com/leanprover-community/mathlib4/blob/5ebccb65951c70539ba1c36e53e079ac28b3fd23/Mathlib/Geometry/Manifold/Riemannian/Basic.lean#L452-L454 - [ ] add test cases [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-linter WIP 1364/1 Mathlib/Init.lean,Mathlib/Tactic/Linter/Indentation.lean,Mathlib/Tactic/Linter/Indentation/Basic.lean,Mathlib/Tactic/Linter/Indentation/Defs.lean,Mathlib/Tactic/Linter/Indentation/Linters.lean,MathlibTest/IndentationLinter.lean,lakefile.lean 7 13 ['Hagb', 'github-actions', 'grunweg'] nobody
55-24330
1 month ago
60-24587
1 month ago
0-0
0 seconds
28168 astrainfinita
author:astrainfinita
feat: hensel's lemma for topological rings --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra t-topology WIP
label:t-algebra$
616/0 Mathlib/RingTheory/Polynomial/Hensel.lean 1 1 ['github-actions'] nobody
55-7063
1 month ago
55-7073
1 month ago
0-0
0 seconds
23758 erdOne
author:erdOne
feat(Topology/Algebra): linearly topologized iff non-archimedean ...for topological modules over compact rings or `ℤ`-finite rings --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra t-topology awaiting-author
label:t-algebra$
138/3 Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/Topology/Algebra/LinearTopology.lean 2 21 ['ADedecker', 'AntoineChambert-Loir', 'erdOne', 'github-actions', 'grunweg'] ADedecker and AntoineChambert-Loir
assignee:AntoineChambert-Loir assignee:ADedecker
54-81261
1 month ago
54-81261
1 month ago
124-78308
124 days
26901 5hv5hvnk
author:5hv5hvnk
feat: a simproc version of `compute_degree` Wrap `compute_degree` in a simproc for use by simp. Closes #22219. --- new-contributor awaiting-CI t-meta awaiting-author 198/0 Mathlib.lean,Mathlib/Tactic/Simproc/PolynomialDegree.lean,MathlibTest/polynomial_degree_simproc.lean 3 18 ['5hv5hvnk', 'YaelDillies', 'adomani', 'github-actions'] nobody
53-56956
1 month ago
53-56956
1 month ago
2-71043
2 days
27850 fyqing
author:fyqing
feat: 0-dimensional manifolds are discrete and countable This is the converse direction of the classification of 0-dimensional manifolds. The other direction was shown in #22105. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-differential-geometry awaiting-author 80/0 Mathlib.lean,Mathlib/Geometry/Manifold/ZeroDim.lean 2 13 ['fyqing', 'github-actions', 'grunweg', 'tb65536'] grunweg
assignee:grunweg
53-54564
1 month ago
63-15380
2 months ago
0-6418
1 hour
27444 grunweg
author:grunweg
feat: generalise more lemmas to enorms The selection of lemmas may seem eclectic, but follows a clear path: I'm working on generalising the last section of `IntegrableOn.lean` to enorms. (This will be continued in a later PR.) --- Commits can be reviewed independently. - [x] depends on: #27419 (first commits) - [x] depends on: #27456 (last commits) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) carleson WIP 10/0 Mathlib/MeasureTheory/Function/L1Space/HasFiniteIntegral.lean 1 3 ['github-actions', 'grunweg', 'mathlib4-dependent-issues-bot'] nobody
53-40124
1 month ago
53-40160
1 month ago
0-1886
31 minutes
26351 RemyDegenne
author:RemyDegenne
feat: covering and packing numbers of sets in a metric space We define covering numbers of sets in a pseudo-metric space, which are minimal cardinalities of `ε`-covers of sets. We also define the packing number, which is the maximal cardinality of an `ε`-separated set. From the Brownian motion project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-author 261/0 Mathlib.lean,Mathlib/Topology/MetricSpace/CoveringNumbers.lean 2 9 ['ADedecker', 'RemyDegenne', 'YaelDillies', 'github-actions', 'j-loreaux'] j-loreaux
assignee:j-loreaux
53-38436
1 month ago
56-25242
1 month ago
45-38108
45 days
27708 vihdzp
author:vihdzp
feat: unions and intersections of ordinals are ordinals As well as a bonus result `IsTransitive.empty_mem`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory awaiting-author 58/16 Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Ordinal.lean 2 4 ['alreadydone', 'b-mehta', 'github-actions', 'vihdzp'] alreadydone
assignee:alreadydone
53-8024
1 month ago
53-8024
1 month ago
12-2927
12 days
24850 pechersky
author:pechersky
feat(Topology/UniformSpace/Ultra): uniform spaces induced by pseudometrics are ultra if system is ultra Any uniform space has a natural system of pseudometrics definable on it, comprised of those pseudometrics constructed from a descending chain of equivalence relation entourages. In a nonarchimedean uniformity, this pseudometric system induces the uniformity. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #23111 t-topology 509/1 Mathlib.lean,Mathlib/Topology/MetricSpace/BundledFun.lean,Mathlib/Topology/UniformSpace/Ultra/Pseudometrizable.lean 3 8 ['ADedecker', 'fpvandoorn', 'github-actions', 'mathlib4-dependent-issues-bot', 'pechersky'] urkud
assignee:urkud
53-8009
1 month ago
115-81719
3 months ago
131-27248
131 days
27000 gasparattila
author:gasparattila
feat(Analysis/Normed/Group/Quotient): isometric versions of isomorphisms This PR adds an isometric version of the third isomorphism theorem for groups and modules. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-analysis 49/2 Mathlib/Analysis/Normed/Group/Quotient.lean 1 1 ['github-actions'] urkud
assignee:urkud
53-8004
1 month ago
84-47131
2 months ago
84-47177
84 days
27226 xcloudyunx
author:xcloudyunx
feat(Combinatorics/SimpleGraph): Add Subgraph.inclusion_edge_apply_coe and inclusion_edgeSet_apply_coe This PR continues the work from #25248. Original PR: https://github.com/leanprover-community/mathlib4/pull/25248 new-contributor t-combinatorics awaiting-author 14/0 Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 1 3 ['b-mehta', 'github-actions', 'xcloudyunx'] b-mehta
assignee:b-mehta
52-82351
1 month ago
53-10031
1 month ago
25-83942
25 days
22925 ggranberry
author:ggranberry
feat(Mathlib/PlaceHolder/ToeplitzHausdorff): Toeplitz-Hausdorff --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) will-close-soon new-contributor t-analysis awaiting-author WIP help-wanted 411/0 Mathlib/PlaceHolder/ToeplitzHausdorff.lean,Mathlib/PlaceHolder/ToeplitzHausdorff_v2.lean 2 11 ['faenuccio', 'ggranberry', 'github-actions'] faenuccio
assignee:faenuccio
51-58475
1 month ago
51-58678
1 month ago
4-24257
4 days
27180 ADedecker
author:ADedecker
feat: quotient of a monoid with zero by a multiplicative congruence --- My motivation is getting a more conceptual construction of [ValuativeRel.ValueGroupWithZero](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/Valuation/ValuativeRel.html#ValuativeRel.ValueGroupWithZero), but I think this is of independent interest. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra delegated
label:t-algebra$
141/26 Mathlib.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/GroupWithZero.lean 5 31 ['ADedecker', 'eric-wieser', 'github-actions', 'mathlib-bors', 'ocfnash'] ocfnash
assignee:ocfnash
51-51632
1 month ago
51-64840
1 month ago
28-12053
28 days
21031 YaelDillies
author:YaelDillies
chore: get rid of generic hom coercions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP 161/166 Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/GroupWithZero/Hom.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Ring/Hom/Defs.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/Logic/Equiv/Defs.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/RingTheory/Valuation/Basic.lean 13 13 ['Vierkantor', 'YaelDillies', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
51-25543
1 month ago
51-25605
1 month ago
0-17
17 seconds
27754 Parcly-Taxel
author:Parcly-Taxel
feat: `finCycle` as iterated `finRotate` Originally used in #25786, but eventually discovered to be unnecessary. t-logic 26/5 Mathlib/Logic/Equiv/Fin/Rotate.lean 1 1 ['github-actions'] fpvandoorn
assignee:fpvandoorn
51-7995
1 month ago
64-42751
2 months ago
64-42799
64 days
27946 plp127
author:plp127
refactor: have `MetrizableSpace` not depend on `MetricSpace` Some theorems for uniform spaces with a countably generated uniformity do not mention their uniformity in any of the hypotheses or the conclusion (for example `UniformSpace.isCompact_iff_isSeqCompact`). This PR allows those theorems to be stated for (pseudo)metrizable spaces without importing the real numbers. See also #2032 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 129/102 Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Topology/Compactness/PseudometrizableLindelof.lean,Mathlib/Topology/GDelta/MetrizableSpace.lean,Mathlib/Topology/Metrizable/Basic.lean,Mathlib/Topology/Metrizable/ContinuousMap.lean,Mathlib/Topology/Metrizable/Real.lean,Mathlib/Topology/Metrizable/Uniformity.lean 7 7 ['github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] urkud
assignee:urkud
50-7980
1 month ago
59-62665
1 month ago
60-28140
60 days
26125 faenuccio
author:faenuccio
first commit --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) dependency-bump WIP 56/1 Hammer/experiment1.lean,lake-manifest.json,lakefile.lean 3 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
49-67340
1 month ago
49-67340
1 month ago
0-19
19 seconds
27974 smmercuri
author:smmercuri
feat: `Field`, `FiniteDimensional` and `Algebra.IsSeparable` instances for `WithAbs` This PR continues the work from #24870. Original PR: https://github.com/leanprover-community/mathlib4/pull/24870 large-import t-analysis awaiting-author 14/1 Mathlib/Analysis/Normed/Field/WithAbs.lean 1 2 ['github-actions', 'j-loreaux'] j-loreaux
assignee:j-loreaux
48-80312
1 month ago
48-80312
1 month ago
10-66566
10 days
27196 YaelDillies
author:YaelDillies
refactor(Polynomial/Bivariate): swap `X` and `Y` for improved notation This way, `X` keeps on being `X`. From Toric --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) toric t-algebra WIP
label:t-algebra$
3/3 Mathlib/Algebra/Polynomial/Bivariate.lean 1 3 ['YaelDillies', 'alreadydone', 'github-actions'] nobody
48-52490
1 month ago
63-73030
2 months ago
15-75841
15 days
28141 YaelDillies
author:YaelDillies
chore: deprecate `BialgHom.coe_toLinearMap` `BialgHom.toLinearMap` is a fake projection. From Toric --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory toric easy 5/11 Mathlib/RingTheory/Bialgebra/Hom.lean 1 8 ['YaelDillies', 'eric-wieser', 'github-actions'] alreadydone
assignee:alreadydone
48-7983
1 month ago
55-71512
1 month ago
55-71505
55 days
26349 mans0954
author:mans0954
feat(Analysis/SpecialFunctions/Trigonometric/Basic): sin and cos of multiples of π / 3 This PR continues the work from #25009. Original PR: https://github.com/leanprover-community/mathlib4/pull/25009 t-analysis help-wanted 159/0 Mathlib/Algebra/Order/Monoid/NatCast.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Data/Nat/Cast/Defs.lean,MathlibTest/trigonometry.lean 4 3 ['github-actions', 'mans0954', 'themathqueen'] nobody
47-24102
1 month ago
60-61387
1 month ago
5-42837
5 days
28198 Sebi-Kumar
author:Sebi-Kumar
feat(Analysis/InnerProductSpace/PiL2): Add instances for EuclideanSpace rank and EuclideanSpace being infinite Add an instance for `Fact (Module.finrank 𝕜 (EuclideanSpace 𝕜 (Fin n)) = n)` which is needed to apply [stereographic'](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Geometry/Manifold/Instances/Sphere.html#stereographic') to EuclideanSpace. Also add an instance for `Infinite (EuclideanSpace 𝕜 ι)` where `ι` is a nonempty fintype. I wasn't sure if these should go in separate pull requests, but they seemed similar enough to me. Thank you to Kenny Lau for the suggestions at [#mathlib4 > Instances for EuclideanSpace](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Instances.20for.20EuclideanSpace). --- To provide additional context, I am new to contributing to Mathlib, and I am doing so as a part of the Fields Undergraduate Summer Research Program at the University of Western Ontario under the supervision of Chris Kapulkin and Daniel Carranza. My goal is to contribute that the `n`-sphere is simply connected for `n > 1`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis 6/0 Mathlib/Analysis/InnerProductSpace/PiL2.lean 1 1 ['github-actions'] urkud
assignee:urkud
47-7984
1 month ago
54-21220
1 month ago
54-21260
54 days
27302 tristan-f-r
author:tristan-f-r
feat(Fintype/Quotient): finLiftOn₂ The combination of [`Quotient.finLiftOn`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Fintype/Quotient.html#Quotient.finLiftOn) and [`liftOn₂`](https://leanprover-community.github.io/mathlib4_docs/Init/Core.html#Quotient.liftOn%E2%82%82). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 19/0 Mathlib/Data/Fintype/Quotient.lean 1 10 ['github-actions', 'kckennylau', 'tristan-f-r', 'vihdzp'] nobody
46-79077
1 month ago
76-4316
2 months ago
76-4352
76 days
5897 eric-wieser
author:eric-wieser
feat: add a `MonadError` instance for `ContT` We already have a `MonadExcept` instance; this promotes it to `MonadError`. Note the issue with the existing `MonadExcept` instance still applies. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author 16/0 Mathlib/Control/Monad/Cont.lean 1 25 ['Vierkantor', 'YaelDillies', 'eric-wieser', 'github-actions', 'kmill'] nobody
46-57103
1 month ago
442-77817
1 year ago
339-53816
339 days
28276 eric-wieser
author:eric-wieser
refactor: tidy `lift_unique` lemmas --- - [ ] depends on: #28275 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
37/20 Mathlib/Algebra/FreeAlgebra.lean,Mathlib/Algebra/Lie/UniversalEnveloping.lean,Mathlib/LinearAlgebra/DFinsupp.lean,Mathlib/LinearAlgebra/ExteriorAlgebra/Basic.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
46-56374
1 month ago
46-56393
1 month ago
0-0
0 seconds
23881 YaelDillies
author:YaelDillies
feat: `ℝ≥0`-valued Lᵖ norm This is useful when inputting the Lp norm in places that expect a real number, like an exponent. From LeanAPAP --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability awaiting-author 218/6 Mathlib.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Defs.lean,Mathlib/MeasureTheory/Function/LpSeminorm/NNLpNorm.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean 4 20 ['YaelDillies', 'b-mehta', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot', 'sgouezel'] nobody
46-46302
1 month ago
46-46321
1 month ago
13-15316
13 days
28072 kckennylau
author:kckennylau
feat(RingTheory/Valuation): make tactic rw_val_equiv Co-authored by Aaron Liu and Bhavik Mehta. A tactic to rewrite relations such as `max (v₁ x) (v₁ y) * v₁ z < 1` into `max (v₂ x) (v₂ y) * v₂ z < 1` , given `h : v₁.IsEquiv v₂`. Allowed relations are `≤`, `<`, `=`, `≠`. Allowed operations are: `0`, `1`, `v₁ r`, `⁻¹`, `^` (both `ℕ` and `ℤ`), `*`, `/`, `min`, `max`. Examples: ```lean example {R Γ₁ Γ₂ : Type} [Ring R] [LinearOrderedCommMonoidWithZero Γ₁] [LinearOrderedCommMonoidWithZero Γ₂] {v₁ : Valuation R Γ₁} {v₂ : Valuation R Γ₂} (h : v₁.IsEquiv v₂) {y z : R} : {x | v₁ x ^ 2 * min (v₁ y) (v₁ z) ≤ 1} = {x | v₂ x ^ 2 * min (v₂ y) (v₂ z) ≤ 1} := by rw_val_equiv h ``` It is also possible to use `←` to rewrite in the opposite direction, and to use `at h1 h3 ⊢` to specify which hypotheses (and/or goal) to rewrite, similar to the syntax of `rw`. There is also `rwa_val_equiv` to work like `rwa`. --- Zulip: [#Is there code for X? > Tactics for comparing equivalent valuations](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Tactics.20for.20comparing.20equivalent.20valuations) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 455/13 Mathlib/RingTheory/Valuation/Basic.lean,MathlibTest/Simproc/ValEquiv.lean 2 34 ['b-mehta', 'eric-wieser', 'github-actions', 'kckennylau', 'pechersky', 'plp127'] erdOne
assignee:erdOne
46-7999
1 month ago
56-29691
1 month ago
57-4190
57 days
28191 kckennylau
author:kckennylau
feat(Logic): tag Injective, Surjective, and Bijective with fun_prop --- Zulip: * [#Is there code for X? > surjective is not funprop!](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/surjective.20is.20not.20funprop!) * [#mathlib4 > `fun_prop` for Injective/Surjective/Bijective?](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.60fun_prop.60.20for.20Injective.2FSurjective.2FBijective.3F) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 16/0 Mathlib/Tactic/FunProp.lean 1 3 ['github-actions', 'grunweg', 'kckennylau'] alexjbest
assignee:alexjbest
46-7997
1 month ago
53-44508
1 month ago
54-22713
54 days
25692 Whysoserioushah
author:Whysoserioushah
feat(RingTheory/MatrixAlgebra): add a more general version of `matrixEquivTensor` This adds `tensorMatrixLinearEquiv : A ⊗[R] Matrix n n B ≃ₐ[S] Matrix n n (A ⊗[R] B)` which is a more general version of `matrixEquivTensor : Matrix n n A ≃ₐ[R] (A ⊗[R] Matrix n n R)`. The latter is then implemented as a trivial consequence of the former. Many internal implementation details are deleted without deprecation, although strictly these were not private. Co-authored-by: @erdOne Co-authored-by: Eric Wieser --- - [ ] depends on: #28367 - [ ] depends on: #28359 - [ ] depends on: #28368 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author 129/110 Mathlib/RingTheory/MatrixAlgebra.lean 1 27 ['Whysoserioushah', 'chrisflav', 'eric-wieser', 'github-actions', 'jcommelin', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'mattrobball'] chrisflav
assignee:chrisflav
45-67725
1 month ago
45-67725
1 month ago
63-50556
63 days
28631 faenuccio
author:faenuccio
feat(Data\Nat\ModEq.lean): add grind attribute to ModEq --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data WIP 7/0 Mathlib/Data/Nat/ModEq.lean 1 4 ['faenuccio', 'github-actions', 'leanprover-bot'] nobody
45-62756
1 month ago
45-65275
1 month ago
0-22
22 seconds
26329 Timeroot
author:Timeroot
feat: Definition of `Clone` notations and typeclasses Definitions and notation typeclasses for #20051 --- This PR continues the work from #23459. Original PR: https://github.com/leanprover-community/mathlib4/pull/23459 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-CI awaiting-author
label:t-algebra$
100/0 Mathlib.lean,Mathlib/Algebra/Clone/Defs.lean 2 3 ['Timeroot', 'YaelDillies', 'github-actions'] nobody
45-60639
1 month ago
45-60639
1 month ago
0-21917
6 hours
27752 plp127
author:plp127
feat(Order): `NoBotOrder α` implies `NoMinOrder α` under `IsDirected α (· ≥ ·)` This PR continues the work from #24266. Original PR: https://github.com/leanprover-community/mathlib4/pull/24266 t-order awaiting-author 14/0 Mathlib/Order/Directed.lean 1 4 ['github-actions', 'j-loreaux', 'plp127'] nobody
45-25615
1 month ago
45-25615
1 month ago
19-20394
19 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. new-contributor t-combinatorics 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 1 ['github-actions'] awainverse
assignee:awainverse
45-8007
1 month ago
56-26476
1 month ago
56-26515
56 days
28153 kckennylau
author:kckennylau
feat(Simproc): Simproc for explicit diagonal matrices ```lean example : (diagonal ![37, -1] : Matrix (Fin 2) (Fin 2) ℤ) = !![37, 0; 0, -1] := by simp ``` --- Shares code with #28148. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 114/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Simproc/Matrix.lean,scripts/noshake.json 4 1 ['github-actions'] alexjbest
assignee:alexjbest
45-8005
1 month ago
55-32747
1 month ago
55-32792
55 days
28186 Sebi-Kumar
author:Sebi-Kumar
feat(Topology/Homotopy/Path): Add IsEquiv instance for Path.Homotopic Add `instance : IsEquiv (Path x₀ x₁) Homotopic` to the library. Allow use of lemmas like `of_eq` when proving two paths are homotopic. --- To provide additional context, I am relatively new to contributing to Mathlib, and I am doing so as a part of the Fields Undergraduate Summer Research Program hosted at the University of Western Ontario and supervised by Chris Kapulkin and Daniel Carranza. My goal is to prove that the `n`-sphere is simply connected for `n > 1`. Also, I am not super familiar with `IsEquiv` and when it should/shouldn't be used. I just wanted to use a lemma like `Path.Homotopic.of_eq` at one point while working on my code, and thought this was the best way to add such a result to the library. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology 5/0 Mathlib/Topology/Homotopy/Path.lean 1 4 ['Sebi-Kumar', 'github-actions', 'kckennylau'] PatrickMassot
assignee:PatrickMassot
45-8004
1 month ago
54-39334
1 month ago
54-39376
54 days
24514 b-mehta
author:b-mehta
chore(Int/GCD): use fuel in xgcd Modify the definition of xgcd to use fuel recursion, to allow it to be reduced in the kernel. As a consequence, this means the evaluation of field operations in ZMod p become provable by `rfl` and `decide`. Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/opaque.20recursion.20definitions.20break.20mergeSort.20decidability --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-author 44/22 Mathlib/Data/Int/GCD.lean 1 5 ['astrainfinita', 'b-mehta', 'eric-wieser', 'github-actions', 'nomeata', 'urkud'] nobody
44-68449
1 month ago
97-11146
3 months ago
58-34020
58 days
26645 erdOne
author:erdOne
feat(RingTheory/PowerSeries): Construction of `Q` such that `P(Q(X)) = X` Co-authored-by: Junnosuke Koizumi Co-authored-by: Hyeon, Seung-Hyeon Co-authored-by: Yuichiro Taguchi This contribution was created as part of the ZMC conference 2025 "Anabelian Geometry and its Computer Formalization". --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author 133/0 Mathlib/RingTheory/PowerSeries/Substitution.lean 1 9 ['chrisflav', 'erdOne', 'github-actions', 'kckennylau'] kbuzzard
assignee:kbuzzard
44-68279
1 month ago
44-68279
1 month ago
48-29860
48 days
28680 vihdzp
author:vihdzp
feat: set has cardinality one iff singleton --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory easy awaiting-author 11/1 Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Defs.lean 2 5 ['b-mehta', 'github-actions', 'kckennylau'] nobody
44-48640
1 month ago
44-48640
1 month ago
0-24645
6 hours
26243 DavidLedvinka
author:DavidLedvinka
feat(Topology): Add PairReduction.lean Add file PairReduction.lean which proves the theorem `pair_reduction` which is needed for the proof of the general Kolmogorov-Chentsov theorem in the Brownian Motion project. Co-authored-by: @RemyDegenne - [x] depends on: #27239 t-topology awaiting-author 424/0 Mathlib.lean,Mathlib/Topology/EMetricSpace/PairReduction.lean 2 76 ['DavidLedvinka', 'EtienneC30', 'RemyDegenne', 'github-actions', 'mathlib4-dependent-issues-bot', 'sgouezel'] nobody
44-14758
1 month ago
50-30482
1 month ago
39-560
39 days
26428 Ruben-VandeVelde
author:Ruben-VandeVelde
feat: norm_num support for Int.fract --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data t-meta 61/0 Mathlib/Data/Rat/Floor.lean,MathlibTest/norm_num_ext.lean 2 6 ['Rob23oba', 'github-actions', 'grunweg'] Rob23oba
assignee:Rob23oba
43-51120
1 month ago
43-51120
1 month ago
99-65601
99 days
26078 kckennylau
author:kckennylau
feat(AlgebraicGeometry): add x, y, px, py for points on elliptic curves --- Split from #25218. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry awaiting-author 44/0 Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean 1 12 ['MichaelStollBayreuth', 'Multramate', 'acmepjz', 'dagurtomas', 'github-actions', 'kckennylau'] dagurtomas
assignee:dagurtomas
43-43164
1 month ago
43-43164
1 month ago
64-11252
64 days
28422 euprunin
author:euprunin
chore(Data/Fin): deprecate `Fin.mul_one'` (duplicate) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-author 3/8 Mathlib/Data/Fin/Basic.lean,Mathlib/Data/ZMod/Defs.lean 2 2 ['eric-wieser', 'github-actions'] nobody
42-20504
1 month ago
42-20504
1 month ago
8-10801
8 days
28399 Ruben-VandeVelde
author:Ruben-VandeVelde
feat: ring-theoretic fractions in Rat --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 47/0 Mathlib.lean,Mathlib/RingTheory/Localization/Rat.lean 2 1 ['github-actions'] robertylewis
assignee:robertylewis
42-8013
1 month ago
50-67349
1 month ago
50-67390
50 days
28473 EtienneC30
author:EtienneC30
feat: toLp and ofLp are analytic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 42/0 Mathlib.lean,Mathlib/Analysis/Analytic/WithLp.lean 2 1 ['github-actions'] hrmacbeth
assignee:hrmacbeth
42-8010
1 month ago
49-48584
1 month ago
49-48562
49 days
27990 kckennylau
author:kckennylau
feat(Counterexamples): a nontrivial valuation with discrete topology This file constructs a valuation on `K[X]` satisfying `IsValuativeTopology K[X] ∧ Nonempty (valuation K[X]).RankOne ∧ IsNontrivial K[X] ∧ DiscreteTopology K[X]`, and proves that `IsValuativeTopology F ∧ IsNontrivial F ∧ DiscreteTopology F` is not possible if `F` is a field. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 172/0 Counterexamples.lean,Counterexamples/DiscreteTopologyWithNontrivialValuation.lean 2 n/a ['github-actions', 'grunweg', 'kckennylau', 'pechersky'] nobody
41-79498
1 month ago
unknown
unknown
28812 yury-harmonic
author:yury-harmonic
feat(PNat/Factors): add attrs and lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 42/0 Mathlib/Data/PNat/Factors.lean 1 1 ['github-actions'] nobody
41-43612
1 month ago
41-43768
1 month ago
41-43803
41 days
27245 rirarika
author:rirarika
feat: multivariate polynomial ring properties about irreducibility --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra
label:t-algebra$
88/0 Mathlib.lean,Mathlib/Algebra/MvPolynomial/Irreducible.lean 2 5 ['alreadydone', 'github-actions', 'mbkybky'] alreadydone
assignee:alreadydone
41-40801
1 month ago
77-69247
2 months ago
77-69284
77 days
27479 iu-isgood
author:iu-isgood
feat: Abel's Binomial Theorem We have formalized Abel's Binomial Theorem as part of an REU project. There are a few remaining sorrys, but we will finish them soon. I will edit this PR message later according to community rules. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor awaiting-author 326/0 Mathlib/Data/Nat/Choose/AbelBinomial.lean 1 28 ['ElifUskuplu', 'FrankieNC', 'github-actions', 'iu-isgood'] nobody
41-40783
1 month ago
65-18680
2 months ago
0-533
8 minutes
25907 mans0954
author:mans0954
feat: low order roots of unity This PR continues the work from #25470. Original PR: https://github.com/leanprover-community/mathlib4/pull/25470 t-algebra
label:t-algebra$
182/0 Mathlib/Algebra/CharP/Invertible.lean,Mathlib/RingTheory/RootsOfUnity/Complex.lean 2 2 ['github-actions', 'mans0954'] kim-em
assignee:kim-em
41-40763
1 month ago
110-53454
3 months ago
110-53497
110 days
25700 grunweg
author:grunweg
feat: lint upon uses of the `mono` tactic suggesting to use `gcongr` instead. In general, `mono` is unmaintained, was only partially ported --- and gcongr at this point is more featureful, actively developed and has a nicer user interface. The topic was also discussed [on zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Porting.20note.3A.20Fixing.20up.20.60mono.60/with/445125798). --- TODO: update the linter wording, fix its implementation and wait until tests pass - [ ] depends on: #25698 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter RFC please-adopt 15/0 MathlibTest/DeprecatedSyntaxLinter.lean,MathlibTest/Monotonicity.lean 2 3 ['github-actions', 'grunweg', 'mathlib4-dependent-issues-bot'] nobody
41-40428
1 month ago
41-40470
1 month ago
72-55831
72 days
28215 5hv5hvnk
author:5hv5hvnk
Draft PR, for Strong and Weak connectivity for Digraphs strong and weak connectivity in Digraphs --- Should resolve a part of issue #26771 Main additions in the PR: 1. Walks in Digraphs (Walk.lean) - Basic walk structure with start and end vertices - Support for walk operations: append, reverse, length - Support functions: getVert, copy, support 2. Walk Decompositions (WalkDecomp.lean) - takeUntil and dropUntil functions to split walks - rotate operation for loop walks - Theorems relating to walk decomposition properties 3. Subgraphs (subgraph.lean) - Subgraph structure for digraphs - Induced and spanning subgraph predicates - Lattice structure (sup, inf, top, bot) - Coercion to standalone digraphs 4. Paths (Paths.lean) - Trail, Path, Circuit, Cycle definitions - Path structure with no repeating vertices - Theorems relating different path types - Basic connectivity definitions (reachable, weakly/strongly connected) 5. Connectivity (Connected.lean) - Reachability relations and properties - Strong and weak connectivity definitions - Connected component types: - StronglyConnectedComponent - WeaklyConnectedComponent - ConnectedComponent - Component properties and equivalence relations --> [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics awaiting-author 1216/0 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 5 3 ['github-actions', 'grunweg'] nobody
41-39366
1 month ago
41-39366
1 month ago
12-41939
12 days
28821 yury-harmonic
author:yury-harmonic
feat(SimpleGraph/Finite): add lemmas `simpNF` complains because `*Finset` are `abbrev`s. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 24/1 Mathlib/Combinatorics/SimpleGraph/Finite.lean 1 1 ['github-actions'] nobody
41-23795
1 month ago
41-23845
1 month ago
0-0
0 seconds
28531 Ruben-VandeVelde
author:Ruben-VandeVelde
chore: remove Cardinal imports from Topology.Algebra.InfiniteSum.Group --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 51/15 Mathlib.lean,Mathlib/Analysis/BoxIntegral/UnitPartition.lean,Mathlib/Analysis/Normed/Group/Pointwise.lean,Mathlib/Analysis/Normed/Module/Convex.lean,Mathlib/Analysis/SpecificLimits/Basic.lean,Mathlib/Topology/Algebra/InfiniteSum/Const.lean,Mathlib/Topology/Algebra/InfiniteSum/Group.lean,Mathlib/Topology/Algebra/InfiniteSum/NatInt.lean,Mathlib/Topology/Algebra/InfiniteSum/Order.lean,Mathlib/Topology/Algebra/InfiniteSum/Real.lean,Mathlib/Topology/Category/Stonean/Basic.lean,Mathlib/Topology/Instances/ENNReal/Lemmas.lean,Mathlib/Topology/Instances/NNReal/Lemmas.lean,Mathlib/Topology/MetricSpace/HausdorffDistance.lean,Mathlib/Topology/MetricSpace/Thickening.lean,Mathlib/Topology/PartitionOfUnity.lean 16 4 ['Ruben-VandeVelde', 'YaelDillies', 'github-actions'] TwoFX
assignee:TwoFX
41-7979
1 month ago
48-18831
1 month ago
48-18808
48 days
28766 yury-harmonic
author:yury-harmonic
feat(Nat/Factorial): add tail-recursive versions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 58/1 Mathlib/Data/Nat/Factorial/Basic.lean 1 1 ['github-actions', 'plp127'] nobody
41-7291
1 month ago
42-73779
1 month ago
42-73824
42 days
28837 yury-harmonic
author:yury-harmonic
feat(ValMinAbs): add lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 24/6 Mathlib/Data/ZMod/ValMinAbs.lean 1 1 ['github-actions'] nobody
40-71567
1 month ago
40-71577
1 month ago
40-71610
40 days
28868 yury-harmonic
author:yury-harmonic
feat(Positive): add `OfNat` instance Also fix defeq for `Div` in the `Group` instance. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra
label:t-algebra$
41/13 Mathlib/Algebra/Order/Positive/Field.lean,Mathlib/Algebra/Order/Positive/Ring.lean,Mathlib/Data/PNat/Defs.lean 3 2 ['github-actions', 'yury-harmonic'] nobody
40-27193
1 month ago
40-30016
1 month ago
40-30057
40 days
28132 dupuisf
author:dupuisf
feat: preliminary `grind` tags for `IsUnit` This PR adds preliminary `grind` tags for the `IsUnit` predicate. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 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 2 ['github-actions', 'mathlib4-merge-conflict-bot'] kim-em
assignee:kim-em
40-7984
1 month ago
49-4332
1 month ago
49-4310
49 days
28325 pechersky
author:pechersky
feat(WithZeroTopology): `locallyCompactSpace_iff_locallyFiniteOrder_units` On the way to golf/generalize the proof that locally compact valued fields have locally finite valuation groups as embodied in `Valued.integer.locallyFiniteOrder_units_mrange_of_isCompact_integer` ] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-order t-topology 160/2 Mathlib/Topology/Algebra/GroupWithZero.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean,Mathlib/Topology/Compactness/Compact.lean 3 1 ['github-actions'] PatrickMassot
assignee:PatrickMassot
40-7981
1 month ago
51-76597
1 month ago
51-79301
51 days
24333 xcloudyunx
author:xcloudyunx
feat(Combinatorics/SimpleGraph): cycle graph implementation for generic vertex types The existing `cycleGraph` implementation under Combinatorics/SimpleGraph/Circulant.lean only operates over `Fin n`. This PR implements a cycle graph implementation over any generic vertex type. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics awaiting-author 187/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Cycle.lean 2 41 ['IvanRenison', 'github-actions', 'vlad902'] kmill
assignee:kmill
39-68842
1 month ago
39-68842
1 month ago
123-22718
123 days
28376 euprunin
author:euprunin
chore(Analysis/Calculus/Deriv): golf entire `differentiableAt_comp_const_add` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 2/6 Mathlib/Analysis/Calculus/Deriv/Add.lean 1 1 ['github-actions', 'loefflerd'] nobody
39-25979
1 month ago
39-25979
1 month ago
11-56866
11 days
23835 chrisflav
author:chrisflav
feat(Topology): cardinality of connected components is bounded by cardinality of fiber We show that if `f : X → Y` is an open and closed map to `Y` and `Y` is connected, the number of connected components of `X` is bounded by the cardinality of the fiber of any point. In particular, if `Y` has finitely many connected components and `f` finite fibers, also `X` as finitely many connected components. From Pi1. --- - [x] depends on: #23849 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 242/1 Mathlib.lean,Mathlib/Data/Set/Lattice.lean,Mathlib/SetTheory/Cardinal/Finite.lean,Mathlib/Topology/Clopen.lean,Mathlib/Topology/Connected/CardComponents.lean,Mathlib/Topology/Connected/Clopen.lean 6 5 ['chrisflav', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] grunweg
assignee:grunweg
39-8013
1 month ago
46-51562
1 month ago
48-45590
48 days
27824 ChrisHughes24
author:ChrisHughes24
feat(Calculus): exists_gt_of_deriv_pos and variants --- I created a new file for this as I anticipate there will be many lemmas relating derivatives and monotonicity in future. Some lemmas relating deriviatives to monotonicity are already in mathlib and should maybe moved to the file (e.g. docs#HasDerivWithinAt.nonneg_of_monotoneOn). I stated them in as much generality as I could, copying the generality of `HasDerivWithinAt.nonneg_of_monotoneOn`. - [x] depends on: #28039 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 85/0 Mathlib.lean,Mathlib/Analysis/Calculus/Deriv/Order.lean 2 29 ['ChrisHughes24', 'EtienneC30', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] hrmacbeth
assignee:hrmacbeth
39-8010
1 month ago
49-38210
1 month ago
53-55902
53 days
27155 Pjotr5
author:Pjotr5
feat: Shearer's bound on the independence number of triangle free graphs I added the file IndependenceNumber.lean to the Mathlib.Combinatorics.SimpleGraph.Triangle folder. It contains a proof of a theorem by Shearer on the independence number of triangle-free graphs . I was told this might be useful to add to Mathlib a Zullip thread linked [here](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Convexity.20of.20a.20specific.20function/with/510469526). I tried to comply as much as I could with the Mathlib style guide, but I realise that there is probably still a significant amount of editing to be done. For one thing: there are probably some lemmas and theorems in there that might be better suited in other files, but since this is my first PR I though I would all put it in one file before starting to edit a bunch of files. I was also advised to split up the file into multiple smaller PRs, but since everything is basically serving this one proof I could not really find a natural way to do that. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics awaiting-author 1266/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/IndependenceNumber.lean 2 9 ['Pjotr5', 'github-actions', 'grunweg'] nobody
38-71810
1 month ago
41-40019
1 month ago
39-17587
39 days
24719 madvorak
author:madvorak
feat(LinearAlgebra/Matrix/NonsingularInverse): inverting `Matrix` inverts its `LinearEquiv` --- Discussion: https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2324719.20cannot.20find.20home/with/517142655 t-algebra awaiting-author
label:t-algebra$
10/0 Mathlib/LinearAlgebra/Matrix/NonsingularInverse.lean 1 16 ['eric-wieser', 'github-actions', 'madvorak', 'ocfnash'] nobody
38-65720
1 month ago
60-47697
1 month ago
86-39206
86 days
27242 hugh-fox
author:hugh-fox
feat: add Gauss-like formula for sums of digit sums Adds `sum_digit_sum_base_pow_eq` to show a Gauss-like formula across sums of digit sums. This relies on an additional two simp lemmas, named `digits_sum_eq_self`, `digits_sum_base_mul_cancel`. Lastly, includes a specialization (which is a good bit simpler than the general formula) to base 10 named `sum_digit_sum_ten_pow_eq`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-data new-contributor awaiting-author 113/0 Mathlib/Data/Nat/Digits/Lemmas.lean 1 5 ['github-actions', 'hugh-fox', 'kckennylau'] nobody
38-46779
1 month ago
38-46779
1 month ago
39-41606
39 days
25292 YaelDillies
author:YaelDillies
feat: the `ConvexCone` generated by a set Define `ConvexCone.copy` and `ConvexCone.hull` and use them to golf the `CompleteLattice` instance. From Toric --- - [x] depends on: #25291 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry toric 94/35 Mathlib/Analysis/Convex/Cone/Basic.lean,Mathlib/Geometry/Convex/Cone/Basic.lean 2 8 ['YaelDillies', 'b-mehta', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
38-21099
1 month ago
68-59942
2 months ago
106-11862
106 days
28768 yury-harmonic
author:yury-harmonic
feat(Data/Nat): define `Nat.nthRoot` Define `Nat.nthRoot n a` to be the `n`th root of a natural number `a`. --- This is a dependency of a `norm_num` plugin that can handle `(8 : Real) ^ (2 / 3 : Real)`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 218/0 Mathlib.lean,Mathlib/Data/Nat/NthRoot/Defs.lean,Mathlib/Data/Nat/NthRoot/Lemmas.lean 3 16 ['b-mehta', 'eric-wieser', 'github-actions', 'j-loreaux', 'yury-harmonic'] nobody
38-20236
1 month ago
41-79945
1 month ago
42-34626
42 days
26088 grunweg
author:grunweg
chore(Linter/DirectoryDependency): move forbidden directories into a JSON file This PR continues the work from #25406. Original PR: https://github.com/leanprover-community/mathlib4/pull/25406 t-linter 387/19 Mathlib/Tactic/Linter/DirectoryDependency.lean,scripts/README.md,scripts/forbiddenDirs.json 3 3 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
37-64369
1 month ago
37-64389
1 month ago
107-15328
107 days
25225 xcloudyunx
author:xcloudyunx
feat(Combinatorics/SimpleGraph): Eulerian walk in connected graph contains all vertices --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 16/0 Mathlib/Combinatorics/SimpleGraph/Trails.lean 1 6 ['IvanRenison', 'github-actions', 'vlad902'] kmill
assignee:kmill
37-56648
1 month ago
130-13774
4 months ago
130-13821
130 days
27261 Sebi-Kumar
author:Sebi-Kumar
feat(Topology): add definition for subpaths Define subpaths as restrictions of paths to subintervals, reparameterized to have domain `[0, 1]` and possibly with a reverse of direction. Prove their basic properties. This serves as an alternative to `Path.truncate` which is useful for the explicit construction of certain homotopies, in particular regarding the concatenation of subpaths. --- To provide additional context, this is my first time contributing to Mathlib, and I am doing so as a part of the Fields Undergraduate Summer Research Program hosted at Western University. My intention for this file is for it to be used when proving that the fundamental group of the sphere is trivial (following the proof from Hatcher's "Algebraic Topology"). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology awaiting-author 146/0 Mathlib.lean,Mathlib/Topology/Subpath.lean 2 24 ['ADedecker', 'FrankieNC', 'Sebi-Kumar', 'github-actions', 'themathqueen', 'wwylele'] ADedecker
assignee:ADedecker
37-48219
1 month ago
43-16710
1 month ago
34-15767
34 days
26644 kckennylau
author:kckennylau
feat(SetTheory/ZFC): Define the language of sets and state the ZFC axioms --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory awaiting-author 381/0 Mathlib.lean,Mathlib/SetTheory/ZFC/Axioms.lean,docs/references.bib 3 49 ['b-mehta', 'digama0', 'github-actions', 'kckennylau', 'leanprover-community-bot-assistant', 'staroperator', 'vihdzp'] b-mehta
assignee:b-mehta
37-42534
1 month ago
40-34613
1 month ago
40-53883
40 days
26914 quangvdao
author:quangvdao
feat(Data/PFunctor/Univariate): more definitions for univariate `PFunctor` This PR defines several basic definitions of `PFunctor`, including zero, one, constants, monomials, coproduct (sum), product, sigma, pi, tensor product, universe lifting, and equivalence. We also add: (1) simple lemmas connecting the basic definitions, (2) an automatically derived ext lemma for `PFunctor` via `@[ext]` attribute Some things I'm not clear on: - I define `HAdd` and `HMul` instances for coproduct and product of poly functors having different universe levels. Should I also define `Add` and `Mul` instances for poly functors having the same universe level? - Is it ok to define notation for tensor product, i.e. `@[inherit_doc] scoped infixr:80 " ⊗ " => tensor`? I'm worried it might clash with other notation. - Need a double-check on the priority of notation. Some future definitions to add: - Various equivalences arising from arithmetic identities, e.g., `P + 0 ≃ₚ P`. - Definitions of Lenses and Charts (each of them will be a file or even a folder) - Exponential objects (corresponding to both `prod` and `tensor`) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 144/5 Mathlib/Data/PFunctor/Univariate/Basic.lean 1 19 ['alexkeizer', 'eric-wieser', 'github-actions', 'quangvdao'] eric-wieser
assignee:eric-wieser
37-41364
1 month ago
87-9071
2 months ago
87-9110
87 days
29030 b-mehta
author:b-mehta
feat(Combinatorics): prove the Rado selection lemma Prove the Rado selection lemma, a generic result useful to prove a variety of compactness results in combinatorics. This generalises Konig's infinity lemma, and the de Bruijn-Erdos theorem, and allows the former to be conveniently stated in the language of sets rather than categories. This is a draft PR for now, since the imports are not correct and the names need fixing. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 80/0 Mathlib/Combinatorics/SimpleGraph/DeBruijnErdos.lean 1 1 ['github-actions'] nobody
37-36595
1 month ago
37-36766
1 month ago
0-0
0 seconds
26648 eric-wieser
author:eric-wieser
chore(TensorProduct): remove more `suppress_compilation`s --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-core-PR
label:t-algebra$
3/7 Mathlib/LinearAlgebra/CliffordAlgebra/Prod.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/External.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/Internal.lean 3 4 ['eric-wieser', 'github-actions', 'leanprover-bot'] nobody
37-36457
1 month ago
37-36457
1 month ago
3-19989
3 days
23238 YaelDillies
author:YaelDillies
feat: extended floor and ceil My motivation for this is to prove `ENat.toENNReal (⨆ i, f i) = ⨆ i, ENat.toENNReal (f i)` and `ENat.toENNReal (⨅ i, f i) = ⨅ i, ENat.toENNReal (f i)`. Kalle Kytölä independently needs this for his formalisation of statistical physics. From MiscYD --- - [x] depends on: #24781 - [x] depends on: #24782 See #15269 for a past attempt. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
235/0 Mathlib.lean,Mathlib/Algebra/Order/Floor/Extended.lean 2 25 ['YaelDillies', 'b-mehta', 'eric-wieser', 'github-actions', 'grunweg', 'kkytola', 'mathlib4-dependent-issues-bot', 'urkud'] alreadydone
assignee:alreadydone
37-35640
1 month ago
145-33005
4 months ago
192-85216
192 days
25804 erdOne
author:erdOne
feat: `∑ z ∈ L, ‖z - x‖⁻ʳ` converges for lattices `L` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #21673.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/21673* t-analysis awaiting-author 319/0 Mathlib.lean,Mathlib/Algebra/BigOperators/Group/Finset/Disjoint.lean,Mathlib/Algebra/Module/ZLattice/Summable.lean,Mathlib/Order/Disjointed.lean 4 3 ['github-actions', 'wwylele'] fpvandoorn
assignee:fpvandoorn
37-35448
1 month ago
37-35448
1 month ago
76-21393
76 days
28056 grunweg
author:grunweg
wip: existence of Riemannian metrics Work in progress: will require the material of #26221 (orthonormal frames), hence first be developed there. --- - [x] depends on: #26875 - [x] depends on: #28046 (just nice to have, not strictly necessary) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry WIP 785/0 Mathlib.lean,Mathlib/Geometry/Manifold/ExistsRiemannianMetric.lean,Mathlib/Geometry/Manifold/ExistsRiemannianMetric2.lean,Mathlib/Geometry/Manifold/VectorBundle/Riemannian.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
37-31248
1 month ago
37-31321
1 month ago
0-0
0 seconds
27163 pechersky
author:pechersky
feat(Topology/ValuativeRel): of and to basis of compatible valuations --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology t-number-theory
label:t-algebra$
205/25 Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 2 27 ['github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'pechersky'] alreadydone
assignee:alreadydone
37-28193
1 month ago
37-28214
1 month ago
80-5298
80 days
22662 plp127
author:plp127
feat: Localization.Away.lift (computably) This PR adds `Localization.Away.lift'` and `Localization.Away.lift`, computable alternatives to `Localization.awayLift`. --- - [x] depends on: #24791 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
74/0 Mathlib/RingTheory/Localization/Away/Basic.lean 1 17 ['eric-wieser', 'github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'plp127', 'vihdzp'] mariainesdff
assignee:mariainesdff
37-7770
1 month ago
145-12385
4 months ago
211-12360
211 days
24373 YaelDillies
author:YaelDillies
refactor: golf `modularCharacter` ... using the lessons learned from `distribHaarChar`. Unfortunately, the two setups can't quite be unified because we are lacking an additive version of `MulDistribMulAction`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability awaiting-CI 77/45 Mathlib/MeasureTheory/Group/MeasurableEquiv.lean,Mathlib/MeasureTheory/Group/Measure.lean,Mathlib/MeasureTheory/Group/ModularCharacter.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Measure/Haar/Unique.lean 5 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
36-76952
1 month ago
36-76978
1 month ago
0-0
0 seconds
24383 YaelDillies
author:YaelDillies
feat: distributive Haar characters of `ℝ` and `ℂ` Compute `distribHaarChar` in the case of the actions of `ℝˣ` on `ℝ` and of `ℂˣ` on `ℂ`. The file I'm moving was added two days ago and is not yet used in FLT. From FLT --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed FLT t-measure-probability awaiting-CI WIP 205/78 Mathlib.lean,Mathlib/Algebra/BigOperators/GroupWithZero/Action.lean,Mathlib/Algebra/Group/Action/BigOperators.lean,Mathlib/MeasureTheory/Measure/Haar/DistribChar/Basic.lean,Mathlib/MeasureTheory/Measure/Haar/DistribChar/Complex.lean,Mathlib/MeasureTheory/Measure/Haar/DistribChar/Real.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Measure/Lebesgue/EqHaar.lean 8 21 ['YaelDillies', 'github-actions', 'kbuzzard', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot', 'sgouezel'] nobody
36-76766
1 month ago
36-76789
1 month ago
8-77637
8 days
16041 vihdzp
author:vihdzp
feat(SetTheory/Ordinal/Arithmetic): `Ordinal.toNat` A simple function sending ordinals less than `ω` to themselves, and anything else to `0`. --- - [ ] depends on: #17758 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory t-logic awaiting-author WIP 58/0 Mathlib/SetTheory/Ordinal/Arithmetic.lean 1 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'urkud', 'vihdzp'] nobody
36-58794
1 month ago
36-58796
1 month ago
54-31491
54 days
28630 Antidite
author:Antidite
feat(Archive/Imo): right isosceles configuration in the complex plane feat(Archive/Imo): right isosceles configuration in the complex plane This adds `Archive/Imo/Imo1975Q3.lean`, formalizing a triangle configuration with points A=0, B=1, C=z and auxiliary points R, P, Q built via complex rotations and sine-based scale factors. Main results: * `angle_and_distance`: ∠QRP = π/2 and dist Q R = dist R P. * Key identity `QRP_rot90`: (Q z).z − R.z = e^{iπ/2} · ((P z).z − R.z). Design/Style: * Minimal imports; module docstring; semantic lemma names; all definitions and theorems live under the namespace `IMO.TriangleConfig`. Moves: - (none) Deletions: - (none) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO new-contributor 196/0 Archive.lean,Archive/Imo/Imo1975Q3.lean 2 36 ['Antidite', 'LLaurance', 'github-actions', 'jsm28'] jsm28
assignee:jsm28
36-38202
1 month ago
45-65365
1 month ago
45-65403
45 days
25500 eric-wieser
author:eric-wieser
feat: delaborators for metadata Being able to see these is very important when debugging tactic failures. Probably these could be upstreamed, but I don't think that's a reason not to merge them here first. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-meta delegated awaiting-author 75/3 Mathlib/Util/Delaborators.lean,Mathlib/Util/PPOptions.lean,MathlibTest/delaborators.lean 3 18 ['JovanGerb', 'Rob23oba', 'eric-wieser', 'github-actions', 'kmill', 'mathlib-bors', 'plp127'] alexjbest
assignee:alexjbest
36-36164
1 month ago
36-37046
1 month ago
83-71907
83 days
27392 Paul-Lez
author:Paul-Lez
feat(Tactic/SimpUtils): add simproc finding commands This PR adds some commands to allow users to find simprocs/dsimprocs/simp theorems that match on a given pattern. Thanks to Robin Arnez for telling me about `simprocDeclExt` :) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 690/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/SimpUtils.lean,MathlibTest/SimpUtils.lean 4 9 ['Paul-Lez', 'eric-wieser', 'github-actions', 'kmill'] robertylewis
assignee:robertylewis
36-35300
1 month ago
59-22039
1 month ago
61-22703
61 days
28441 euprunin
author:euprunin
chore(GroupTheory/Perm): golf entire `mem_of_formPerm_ne_self` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory awaiting-author 2/5 Mathlib/GroupTheory/Perm/List.lean 1 2 ['JonBannon', 'github-actions', 'tb65536'] tb65536
assignee:tb65536
36-33105
1 month ago
36-33105
1 month ago
13-75804
13 days
28316 eric-wieser
author:eric-wieser
feat(Tactic/NormNum): better trace nodes Comparing the infoview on the first example in the test file | Before | After | |---|---| | image | image| In the after version, the extension names are all clickable. Similar to #21450. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 136/5 Mathlib.lean,Mathlib/Tactic/NormNum/Core.lean,Mathlib/Util/Trace.lean,MathlibTest/norm_num_trace.lean 4 19 ['JovanGerb', 'eric-wieser', 'github-actions', 'kmill', 'leanprover-bot', 'mathlib-bors', 'plp127'] JovanGerb
assignee:JovanGerb
35-74586
1 month ago
52-16070
1 month ago
52-16053
52 days
29072 yury-harmonic
author:yury-harmonic
feat({Nat,Int}/ModEq): add lemmas --- I'm not sure that I named these lemmas correctly. Suggestions about better names are welcome! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-zulip 171/15 Mathlib/Data/Int/ModEq.lean,Mathlib/Data/Nat/ModEq.lean 2 5 ['eric-wieser', 'github-actions', 'yury-harmonic'] nobody
35-70609
1 month ago
35-70609
1 month ago
0-55232
15 hours
26484 peabrainiac
author:peabrainiac
feat(Geometry/Diffeology): basics of diffeological spaces Introduces diffeological spaces, smooth maps between them, the D-topology and the standard diffeology on finite-dimensional normed spaces. --- This PR continues the work from #21969. t-differential-geometry 471/0 Mathlib.lean,Mathlib/Geometry/Diffeology/Basic.lean,docs/references.bib 3 10 ['JovanGerb', 'github-actions', 'grunweg', 'lecopivo', 'peabrainiac'] grunweg
assignee:grunweg
35-66032
1 month ago
98-848
3 months ago
98-5593
98 days
26240 grunweg
author:grunweg
perf(CommandLinterLinter): use Substring more Probably, these changes make little difference, but let's find out. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter RFC 14/15 Mathlib/Tactic/Linter/CommandStart.lean 1 5 ['github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] joneugster
assignee:joneugster
35-65788
1 month ago
105-16951
3 months ago
105-21556
105 days
26299 adomani
author:adomani
perf: the `commandStart` linter only acts on modified files Introduces an `IO.Ref` to allow the `commandStart` linter to only run on files that git considers modified with respect to `master`. The linter is also active on files that have had some error, as these are likely being modified! The PR should also mitigate the speed-up that the linter introduced: [#mathlib4 > A whitespace linter @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/A.20whitespace.20linter/near/525091877) Assuming that this goes well, a similar mechanism could be applied to several linters that do not need to run on all code, just on the modified code. Implementation detail: the linter is currently either on or off in "whole" files. It may be also a future development to make this more granular and only run the linter on "modifed commands in modified files", but this is not currently the plan for this modification! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter awaiting-author 48/0 Mathlib/Tactic/Linter/CommandStart.lean 1 7 ['adomani', 'github-actions', 'grunweg', 'leanprover-bot'] joneugster
assignee:joneugster
35-65640
1 month ago
35-65762
1 month ago
66-73556
66 days
28474 astrainfinita
author:astrainfinita
feat: add `ContinuousSMul` instances for `ℚ≥0` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) bench-after-CI t-algebra t-topology awaiting-author
label:t-algebra$
14/0 Mathlib/Topology/Instances/Rat.lean 1 11 ['astrainfinita', 'github-actions', 'ocfnash', 'themathqueen'] ocfnash
assignee:ocfnash
35-50593
1 month ago
49-41709
1 month ago
49-48505
49 days
27516 gaetanserre
author:gaetanserre
feat: add rational approximation lemma for suprema in `unitInterval` Add `sSup_eq_iUnion_rat` lemma that provides a rational approximation characterization of suprema in the unit interval. For monotone functions `f : α → I → ℝ`, the lemma establishes that the set of pairs where `a < sSup {x | f e.1 x < e.2}` equals the union over all rationals `q ∈ I` with `q > a` of the sets `{e | f e.1 q < e.2}`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 44/0 Mathlib/MeasureTheory/Constructions/UnitInterval.lean,Mathlib/Topology/UnitInterval.lean 2 6 ['gaetanserre', 'github-actions', 'mathlib4-merge-conflict-bot', 'ocfnash'] ocfnash
assignee:ocfnash
35-42923
1 month ago
40-44642
1 month ago
66-35639
66 days
26913 Paul-Lez
author:Paul-Lez
feat(NumberTheory/{*}): add a few lemmas about number field and cyclotomic extensions The motivation for this PR is that the main statement in [this PR](https://github.com/google-deepmind/formal-conjectures/pull/297) shouldn't need to assume `p` has type `PNat` for the instances to work. This is still WIP as I need to clean up (currently waiting on the build!) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-number-theory awaiting-CI WIP
label:t-algebra$
52/0 Mathlib/NumberTheory/ClassNumber/Temporary.lean,Mathlib/NumberTheory/Cyclotomic/Basic.lean,Mathlib/NumberTheory/Cyclotomic/Embeddings.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/TotallyRealComplex.lean 4 1 ['github-actions'] nobody
35-26052
1 month ago
35-26178
1 month ago
0-28
28 seconds
27433 YaelDillies
author:YaelDillies
refactor: make `⇑e⁻¹ = e.symm` simp From BrauerGroup and ClassFieldTheory --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 217/256 Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/Algebra/Order/Rearrangement.lean,Mathlib/Data/Fintype/Perm.lean,Mathlib/FieldTheory/KrullTopology.lean,Mathlib/GroupTheory/Perm/Basic.lean,Mathlib/GroupTheory/Perm/Centralizer.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Factors.lean,Mathlib/GroupTheory/Perm/Finite.lean,Mathlib/GroupTheory/Perm/Sign.lean,Mathlib/GroupTheory/Perm/Support.lean,Mathlib/GroupTheory/SpecificGroups/Alternating.lean,Mathlib/LinearAlgebra/Matrix/Determinant/Basic.lean,Mathlib/Logic/Equiv/Set.lean 16 3 ['eric-wieser', 'github-actions'] dwrensha
assignee:dwrensha
35-8025
1 month ago
47-48155
1 month ago
47-79520
47 days
28560 euprunin
author:euprunin
chore(Combinatorics/Quiver): golf entire `lift_spec` using `rfl` ---
Show trace profiling of lift_spec: <10 ms before, <10 ms after 🎉 ### Trace profiling of `lift_spec` before PR 28560 ```diff diff --git a/Mathlib/Combinatorics/Quiver/Symmetric.lean b/Mathlib/Combinatorics/Quiver/Symmetric.lean index 33e371b283..76a3371b36 100644 --- a/Mathlib/Combinatorics/Quiver/Symmetric.lean +++ b/Mathlib/Combinatorics/Quiver/Symmetric.lean @@ -164,6 +164,7 @@ def lift [HasReverse V'] (φ : Prefunctor V V') : | Sum.inl g => φ.map g | Sum.inr g => reverse (φ.map g) +set_option trace.profiler true in theorem lift_spec [HasReverse V'] (φ : Prefunctor V V') : Symmetrify.of.comp (Symmetrify.lift φ) = φ := by fapply Prefunctor.ext ``` ``` ✔ [147/147] Built Mathlib.Combinatorics.Quiver.Symmetric (1.3s) Build completed successfully (147 jobs). ``` ### Trace profiling of `lift_spec` after PR 28560 ```diff diff --git a/Mathlib/Combinatorics/Quiver/Symmetric.lean b/Mathlib/Combinatorics/Quiver/Symmetric.lean index 33e371b283..3adf874946 100644 --- a/Mathlib/Combinatorics/Quiver/Symmetric.lean +++ b/Mathlib/Combinatorics/Quiver/Symmetric.lean @@ -164,13 +164,10 @@ def lift [HasReverse V'] (φ : Prefunctor V V') : | Sum.inl g => φ.map g | Sum.inr g => reverse (φ.map g) +set_option trace.profiler true in theorem lift_spec [HasReverse V'] (φ : Prefunctor V V') : Symmetrify.of.comp (Symmetrify.lift φ) = φ := by - fapply Prefunctor.ext - · rintro X - rfl - · rintro X Y f - rfl + tauto theorem lift_reverse [h : HasInvolutiveReverse V'] (φ : Prefunctor V V') {X Y : Symmetrify V} (f : X ⟶ Y) : ``` ``` ✔ [147/147] Built Mathlib.Combinatorics.Quiver.Symmetric (1.2s) Build completed successfully (147 jobs). ```
--- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/)
t-combinatorics 2/6 Mathlib/Combinatorics/Quiver/Symmetric.lean 1 1 ['github-actions'] awainverse
assignee:awainverse
35-8018
1 month ago
47-36273
1 month ago
47-36317
47 days
28486 euprunin
author:euprunin
chore(Order): golf entire `map_covBy`, `covBy_of_apply`, `map_wcovBy`, `wcovBy_of_apply`, `ne_bot_of_ne_top'`, `insert_Icc_left_eq_Icc_pred` and `insert_Icc_right_eq_Icc_succ` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author 14/24 Mathlib/Order/Cover.lean,Mathlib/Order/Disjoint.lean,Mathlib/Order/Interval/Set/SuccPred.lean 3 6 ['YaelDillies', 'bryangingechen', 'github-actions', 'mathlib4-merge-conflict-bot'] bryangingechen
assignee:bryangingechen
34-71635
1 month ago
34-71635
1 month ago
14-50468
14 days
26455 ScottCarnahan
author:ScottCarnahan
WIP - feat (LinearAlgebra/RootSystem): API for CartanMatrix Some attempts at working out good ways to eliminate bad Cartan matrices. Very much WIP --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra WIP
label:t-algebra$
815/26 Mathlib/Algebra/Group/Action/Faithful.lean,Mathlib/LinearAlgebra/LinearIndependent/Basic.lean,Mathlib/LinearAlgebra/RootSystem/Base.lean,Mathlib/LinearAlgebra/RootSystem/CartanMatrix.lean,Mathlib/LinearAlgebra/RootSystem/Finite/CanonicalBilinear.lean,Mathlib/LinearAlgebra/RootSystem/Finite/Lemmas.lean,Mathlib/LinearAlgebra/RootSystem/GeckConstruction/Relations.lean,Mathlib/LinearAlgebra/RootSystem/IsValuedIn.lean,Mathlib/LinearAlgebra/RootSystem/RootPositive.lean 9 7 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
34-70168
1 month ago
34-70186
1 month ago
0-17731
4 hours
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. t-data 35/0 Mathlib/Data/List/Scan.lean 1 9 ['ShreckYe', 'github-actions', 'themathqueen', 'vlad902'] nobody
34-69253
1 month ago
37-64500
1 month ago
37-64542
37 days
29145 JovanGerb
author:JovanGerb
chore: use `to_additive` in more places This PR addresses some comments about `to_additive` not working, by making it work more. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 61/177 Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Order/BigOperators/Group/LocallyFinite.lean,Mathlib/Combinatorics/Additive/DoublingConst.lean,Mathlib/Data/ZMod/Aut.lean,Mathlib/Topology/Algebra/InfiniteSum/Module.lean 5 3 ['JovanGerb', 'github-actions'] nobody
34-12743
1 month ago
34-42682
1 month ago
34-42660
34 days
28390 euprunin
author:euprunin
chore(Analysis/LocallyConvex): golf entire `polar_weak_closed` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 1/4 Mathlib/Analysis/LocallyConvex/Polar.lean 1 2 ['JonBannon', 'github-actions', 'j-loreaux'] j-loreaux
assignee:j-loreaux
34-3846
1 month ago
34-3846
1 month ago
16-76176
16 days
26843 vasnesterov
author:vasnesterov
feat(Tactic/Simproc): nested quantifiers in `existsAndEq` Generalize the `existsAndEq` simproc to nested existential quantifiers. For example `∃ a, p a ∧ ∃ b, a = f b ∧ q b` now simplifies to `∃ b, p (f b) ∧ q b`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This PR continues the work from #23365. Original PR: https://github.com/leanprover-community/mathlib4/pull/23365 migrated-from-branch large-import t-meta 457/77 Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Data/List/ProdSigma.lean,Mathlib/Tactic/Simproc/ExistsAndEq.lean,MathlibTest/Simproc/ExistsAndEq.lean 4 15 ['JovanGerb', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-bot-assistant', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot', 'vasnesterov'] kmill
assignee:kmill
33-54011
1 month ago
34-21403
1 month ago
88-38938
88 days
26156 oliver-butterley
author:oliver-butterley
feat(MeasureTheory.VectorMeasure) : add a definition of total variation for VectorMeasure This PR adds variation for any `VectorMeasure` using a supremum definition. Currently mathlib has `TotalVariation` defined for a signed measure using the Hahn-Jordan decomposition, but this doesn't generalise. Motivation: generally this is an important concept but specifically as a step for proving RMK in the complex case which in turn is a step to prove the spectral theorem. Co-authored-by: @yoh-tanimoto This PR was migrated from #25442. PR divided into smaller pieces, this is just the definition without additional lemmas. PRs adding further results related to variation are: * #26160 * #26165 * #26168 (shows that for `SignedMeasures` the two definitions of variation coincide) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability awaiting-author 358/0 Mathlib.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean 2 32 ['EtienneC30', 'github-actions', 'yoh-tanimoto'] EtienneC30
assignee:EtienneC30
33-47246
1 month ago
64-40366
2 months ago
42-9361
42 days
29186 winstonyin
author:winstonyin
feat: IsIntegralCurve for solutions to ODEs I define `IsIntegralCurve` etc. for solutions to ODEs on vector spaces. The translation and scaling lemmas are also included. This parallels `IsMIntegralCurve` etc. for manifolds. Moved from #26534. - [x] depends on: #26563 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-dynamics t-analysis t-differential-geometry 298/0 Mathlib.lean,Mathlib/Analysis/ODE/Basic.lean,Mathlib/Analysis/ODE/Transform.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
33-27754
1 month ago
33-27844
1 month ago
33-27983
33 days
28279 Equilibris
author:Equilibris
feat: univ generic W A simple change making `W.ind`'s motive universe generic. --- A theorem `w_ind_eq` will now be needed, but this will depend on getting `dcongr_heq` merged, and hence I will do this in a separate PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 16/21 Mathlib/Data/PFunctor/Multivariate/W.lean 1 8 ['Equilibris', 'alexkeizer', 'github-actions'] nobody
33-25992
1 month ago
52-73658
1 month ago
0-0
0 seconds
25856 MichaelStollBayreuth
author:MichaelStollBayreuth
perf(Data.Real.Sqrt): make Real.sqrt irreducible We try to see what happens if we make Real.sqrt irreducible. There are cases where this makes unification very significantly faster, compare [#mathlib4 > Coercion triggers timeout @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Coercion.20triggers.20timeout/near/517177117). (Migrated manually from #24752) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) migrated-from-branch t-data 7/5 Mathlib/Data/Real/Sqrt.lean 1 5 ['MichaelStollBayreuth', 'github-actions', 'j-loreaux', 'leanprover-bot'] ericrbg
assignee:ericrbg
33-22143
1 month ago
33-26859
1 month ago
102-53452
102 days
28296 strihanje01
author:strihanje01
feat(Combinatorics/Additive/VerySmallDoubling): Hamidoune's Freiman-Kneser theorem for nonabelian groups add noncommutative Freiman-Kneser theorem for doubling less than 2-\epsilon --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-combinatorics 339/3 Mathlib/Combinatorics/Additive/VerySmallDoubling.lean 1 14 ['YaelDillies', 'github-actions', 'strihanje01'] awainverse
assignee:awainverse
33-7979
1 month ago
43-51233
1 month ago
45-28077
45 days
25920 BoltonBailey
author:BoltonBailey
feat(Data/Finsupp/Basic): `Finsupp.optionElim'` Similar to how Finsupp.cons constructs a map Fin (n + 1) →₀ M from a map Fin n →₀ M, we define Finsupp.optionElim' to construct a map Option α →₀ M from a map α →₀ M, given an additional value for none. We base this on the new optionEquiv definition. As a function, it behaves as Option.elim', hence the name. We prove a variety of API lemmas, based on those for Finsupp.cons, to bring the definitions more in line with the contents of Data/Finsupp/Fin. We also refactor to a new file to help avoid a too-long file and make this more analogous to Finsupp.cons Original PR: https://github.com/leanprover-community/mathlib4/pull/13861 - [x] depends on: #26309 migrated-from-branch t-data 114/23 Mathlib/Algebra/Category/MonCat/Adjunctions.lean,Mathlib/Data/Finsupp/Option.lean 2 15 ['BoltonBailey', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] eric-wieser
assignee:eric-wieser
32-74031
1 month ago
32-79077
1 month ago
97-49559
97 days
22231 pechersky
author:pechersky
feat(Algebra/Valued): `AdicExpansion` initial defns --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology awaiting-author
label:t-algebra$
299/0 Mathlib.lean,Mathlib/Topology/Algebra/Valued/AdicExpansion.lean 2 7 ['Thmoas-Guan', 'github-actions', 'grunweg', 'jcommelin'] jcommelin
assignee:jcommelin
32-53713
1 month ago
32-53713
1 month ago
189-33553
189 days
28234 alreadydone
author:alreadydone
chore(AlgebraicTopology): clean up FundamentalGroupoid + Extract `FundamentalGroupoid.map (f : C(X, Y)) : FundamentalGroupoid X ⥤ FundamentalGroupoid Y` from `fundamentalGroupoidFunctor : TopCat ⥤ CategoryTheory.Grpd` + Define `FundamentalGroup.map (f : C(X, Y)) (x : X) : FundamentalGroup X x →* FundamentalGroup Y (f x)` and `mapOfEq : FundamentalGroup X x →* FundamentalGroup Y y` that takes an assumption `f x = y`. + Redefine `FundamentalGroup` to be `End` rather than `Aut`: since `FundamentalGroupoid` is a groupoid, `End` already has a group structure. This requires fixing some proofs about `HomotopyGroup`s, so we take this opportunity to golf a few proofs and replace `=>` by `↦`. + Golf within the file FundamentalGroupoid/Basic. + Generalize `toArrow` up to `fromPath` in `FundamentalGroupoid/FundamentalGroup` from `X : TopCat` to `[TopologicalSpace X]`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology awaiting-author 104/141 Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean,Mathlib/CategoryTheory/Groupoid.lean,Mathlib/Topology/Covering.lean,Mathlib/Topology/Homotopy/HomotopyGroup.lean,Mathlib/Topology/Homotopy/Product.lean 8 3 ['github-actions', 'jcommelin', 'mathlib4-merge-conflict-bot'] mattrobball
assignee:mattrobball
32-46978
1 month ago
32-46978
1 month ago
20-65201
20 days
29147 ocfnash
author:ocfnash
feat: miscellaneous root system lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra WIP
label:t-algebra$
73/34 Mathlib/LinearAlgebra/RootSystem/Defs.lean,Mathlib/LinearAlgebra/RootSystem/Finite/G2.lean,Mathlib/LinearAlgebra/RootSystem/Finite/Nondegenerate.lean,Mathlib/LinearAlgebra/RootSystem/Reduced.lean 4 1 ['github-actions'] nobody
32-38498
1 month ago
34-23158
1 month ago
0-2
2 seconds
26710 metakunt
author:metakunt
feat (Data/Nat/Digits/Lemmas): Add digits_getD Adds digits_getD, an explicit computation of the i-th digits of n in base b representation. t-data new-contributor awaiting-author 48/0 Mathlib/Data/Nat/Digits/Lemmas.lean 1 8 ['github-actions', 'pechersky', 'plp127'] nobody
32-26201
1 month ago
35-25392
1 month ago
56-72456
56 days
28070 grunweg
author:grunweg
style: improve indentation of multi-linear enumerations in doc-strings Per zulip discussion: [#mathlib4 > Style :bicycle: : indenting second lines in doc-strings @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Style.20.3Abicycle.3A.20.3A.20indenting.20second.20lines.20in.20doc-strings/near/533105734). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 111/108 Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/BrauerGroup/Defs.lean,Mathlib/Algebra/Module/LinearMap/Polynomial.lean,Mathlib/CategoryTheory/Abelian/NonPreadditive.lean,Mathlib/CategoryTheory/EqToHom.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Limits/Pi.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Sites/Grothendieck.lean,Mathlib/CategoryTheory/Sites/Pretopology.lean,Mathlib/Condensed/Discrete/Characterization.lean,Mathlib/FieldTheory/ChevalleyWarning.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,docs/Conv/Guide.lean 16 6 ['github-actions', 'grunweg', 'kbuzzard'] kbuzzard
assignee:kbuzzard
32-24141
1 month ago
57-70677
1 month ago
57-70654
57 days
28602 gmcninch-tufts
author:gmcninch-tufts
feat(Algebra/Polynomial/Module): prove equivalence of a certain tensor product with PolynomialModule For a commutative ring `R` and an `R`-module `M`, construct an equivalence between the `R[X]`-modules `R[X] ⊗[R] M` and `PolynomialModule R M`. This equivalence enables application of some base-change results to `PolynomialModule R M` . --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra
label:t-algebra$
210/0 Mathlib.lean,Mathlib/Algebra/Polynomial/Module/TensorProduct.lean 2 1 ['github-actions'] jcommelin
assignee:jcommelin
32-8004
1 month ago
46-43480
1 month ago
46-43518
46 days
26284 plp127
author:plp127
feat: faster implementation of `Nat.primeFactorsList` + `@[csimp]` lemma Add a function `Nat.primeFactorsListFast` that `#eval`s faster, and a `@[csimp]` lemma `Nat.primeFactorsList_eq_primeFactorsListFast` that shows `Nat.primeFactorsList = Nat.primeFactorsListFast`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 95/0 Mathlib/Data/Nat/Factors.lean 1 5 ['b-mehta', 'github-actions', 'grunweg', 'plp127'] b-mehta
assignee:b-mehta
31-36734
1 month ago
102-81576
3 months ago
103-9085
103 days
25814 vlad902
author:vlad902
feat(SimpleGraph): Weaker condition for paths in acyclic graphs `IsAcyclic.isPath_iff_chain'` defines a weaker condition for proving that a walk is a path, in particular it shows that rather than proving that all vertices in the support of a walk are distinct, one must only show that consecutive edges are distinct (e.g. every other vertex must be distinct.) This leads to a simple corollary that trails are also paths in acyclic graphs. I had a need for this when formalizing Cayley graphs, since this condition maps cleanly onto words in free groups being reduced. --- *This PR continues the work from #25630.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/25630* t-combinatorics 42/0 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean 2 2 ['github-actions', 'vlad902'] kmill
assignee:kmill
31-36655
1 month ago
113-46591
3 months ago
113-46567
113 days
23940 YaelDillies
author:YaelDillies
feat: polytopes From Toric Co-authored-by: Matthew Johnson --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) toric t-analysis awaiting-author 65/0 Mathlib.lean,Mathlib/Geometry/Convex/Polytope.lean,Mathlib/Geometry/Convex/README.md 3 11 ['Parcly-Taxel', 'YaelDillies', 'eric-wieser', 'github-actions', 'j-loreaux', 'jsm28', 'leanprover-community-bot-assistant', 'ooovi'] j-loreaux
assignee:j-loreaux
31-35803
1 month ago
31-35819
1 month ago
143-64212
143 days
25780 emilyriehl
author:emilyriehl
feat: the homotopy category functor preserves products This proves that the homotopy category construction defines a lax monoidal functor from simplicial sets to categories. In particular, simplicially enriched categories have quotient categorically enriched categories, which might be thought of as "homotopy bicategories." Co-authored-by: Dominic Verity , Bhavik Mehta , Thomas Murrills , and Andrew Yang . --- - [x] depends on: #27576 *This PR continues the work from #25010.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/25010* t-algebraic-topology infinity-cosmos large-import t-category-theory 253/11 Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/AlgebraicTopology/SimplicialSet/Nerve.lean,Mathlib/AlgebraicTopology/SimplicialSet/NerveAdjunction.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/CategoryTheory/Category/ULift.lean,Mathlib/CategoryTheory/ComposableArrows.lean,Mathlib/CategoryTheory/Limits/Preserves/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/BinaryProducts.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Basic.lean,Mathlib/Order/Hom/Basic.lean 10 6 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
31-19061
1 month ago
46-48374
1 month ago
46-49415
46 days
28429 euprunin
author:euprunin
chore(GroupTheory/Perm/Cycle): deprecate `Disjoint.cycleType_mul` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory awaiting-author 2/8 Mathlib/GroupTheory/Perm/Cycle/Type.lean 1 4 ['euprunin', 'github-actions', 'tb65536'] tb65536
assignee:tb65536
31-18230
1 month ago
36-33064
1 month ago
12-12845
12 days
28929 grunweg
author:grunweg
experiment: use `fun_prop` in Homeomorph Can we make the continuity auto-parameters use `fun_prop`? Or perhaps `first |fun_prop; |dsimp; fun_prop`? --- Compared to #13994, it seems this is a much smoother experience. I suspect the RefineDiscTree changes have helped (but that is pure speculation). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 13/5 Mathlib/MeasureTheory/Group/Measure.lean,Mathlib/Topology/Algebra/Algebra/Equiv.lean,Mathlib/Topology/Algebra/Constructions/DomMulAct.lean,Mathlib/Topology/Algebra/ContinuousMonoidHom.lean,Mathlib/Topology/Constructions/SumProd.lean,Mathlib/Topology/Homeomorph/Defs.lean 6 4 ['euprunin', 'github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] PatrickMassot
assignee:PatrickMassot
31-8007
1 month ago
39-12285
1 month ago
39-17599
39 days
27308 xyzw12345
author:xyzw12345
feat(LinearAlgebra/SymmetricAlgebra): IsSymmetricAlgebra This PR continues the work from #24602. Original PR: https://github.com/leanprover-community/mathlib4/pull/24602 t-algebra
label:t-algebra$
78/0 Mathlib/LinearAlgebra/SymmetricAlgebra/Basic.lean,Mathlib/LinearAlgebra/SymmetricAlgebra/Basis.lean 2 3 ['github-actions', 'mattrobball', 'xyzw12345'] mattrobball
assignee:mattrobball
30-68513
1 month ago
75-45337
2 months ago
75-45383
75 days
25927 jjdishere
author:jjdishere
feat(RingTheory/AdicCompletion): more APIs for IsAdicComplete This PR continues the work from #21582. Original PR: https://github.com/leanprover-community/mathlib4/pull/21582 t-ring-theory awaiting-author 452/11 Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/Ideal/Quotient/Defs.lean,Mathlib/RingTheory/Ideal/Quotient/PowTransition.lean 3 5 ['github-actions', 'jjdishere'] nobody
30-67681
1 month ago
59-63305
1 month ago
9-35950
9 days
29232 vihdzp
author:vihdzp
feat: more theorems on `SuccAddOrder` We make use of the (relatively) new `CanonicallyOrderedAdd` typeclass in order to generalize various theorems on `Ordinal` to `SuccAddOrder`. Later on we'll deprecate the `Ordinal` versions in favor of these. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order t-algebra
label:t-algebra$
54/1 Mathlib/Algebra/Order/SuccPred.lean 1 2 ['github-actions', 'plp127'] nobody
30-40391
1 month ago
31-84261
1 month ago
31-84296
31 days
26935 Paul-Lez
author:Paul-Lez
feat(Analysis/SpecialFunction/NthRoot): definition and basic API of Real.nthRoot This PR continues the work from #25364. Original PR: https://github.com/leanprover-community/mathlib4/pull/25364 Co-authored-by: Eric Wieser t-analysis 311/0 Mathlib/Analysis/SpecialFunctions/NthRoot.lean 1 10 ['Paul-Lez', 'eric-wieser', 'github-actions', 'mo271', 'smmercuri', 'yury-harmonic'] nobody
30-14067
1 month ago
86-49141
2 months ago
86-49189
86 days
28831 qawbecrdtey
author:qawbecrdtey
feat(Logic/Equiv/List): add `decodeList_encodeList_eq_self` and removed unnecessary linter options --- This is useful when we call `encode` and `decode` of a list to define a new `Encoder` involving `List`s. ```lean theorem decodeList_encodeList_eq_self (l : List α) : decodeList (encodeList l) = some l ``` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 7/6 Mathlib/Logic/Equiv/List.lean 1 1 ['github-actions'] awainverse
assignee:awainverse
30-8011
1 month ago
41-2055
1 month ago
41-2091
41 days
28906 gasparattila
author:gasparattila
feat(Topology/Algebra/Module): `prod` and `coprod` as `ContinuousLinearEquiv`s --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology 36/5 Mathlib/Topology/Algebra/Module/LinearMapPiProd.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean 2 1 ['github-actions'] jcommelin
assignee:jcommelin
30-8010
1 month ago
39-34577
1 month ago
39-34612
39 days
29120 eric-wieser
author:eric-wieser
feat: add a typeclass for the indiscrete topology Notably, this changes the assumptions of `theorem ContinuousLinearMap.norm_id : ‖id 𝕜 E‖ = 1` from `[NormedAddCommGroup E] [Nontrivial E]` to the more general `[SeminormedAddCommGroup E] [NontrivialTopology E]`. I've skipped the deprecations since #28102 hasn't made it to any release yet. As discussed in [#Is there code for X? > Typeclass for nontrivial topology @ 💬](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Typeclass.20for.20nontrivial.20topology/near/533192558) and [#Is there code for X? > Typeclass for indiscrete topology @ 💬](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Typeclass.20for.20indiscrete.20topology/near/512174181) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 250/76 Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Hom.lean,Mathlib/Analysis/Normed/Group/SeparationQuotient.lean,Mathlib/Analysis/Normed/Module/RCLike/Real.lean,Mathlib/Analysis/Normed/Operator/Basic.lean,Mathlib/Analysis/Normed/Operator/NormedSpace.lean,Mathlib/Analysis/NormedSpace/Multilinear/Basic.lean,Mathlib/Topology/EMetricSpace/Basic.lean,Mathlib/Topology/Homeomorph/Defs.lean,Mathlib/Topology/Inseparable.lean,Mathlib/Topology/Maps/Basic.lean,Mathlib/Topology/Order.lean,Mathlib/Topology/Sets/Opens.lean,Mathlib/Topology/Sheaves/PUnit.lean 14 4 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
30-5598
1 month ago
30-14897
1 month ago
34-85733
34 days
26790 FlAmmmmING
author:FlAmmmmING
feat(Combinatorics/Enumerative/Bell.lean): define standard Bell number --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 46/1 Mathlib/Combinatorics/Enumerative/Bell.lean 1 11 ['AntoineChambert-Loir', 'FlAmmmmING', 'eric-wieser', 'github-actions', 'kckennylau', 'madvorak'] awainverse
assignee:awainverse
29-76680
29 days ago
90-39806
2 months ago
90-39846
90 days
26986 WangYiran01
author:WangYiran01
feat(Partition): add bijection for partitions with max part ≤ r ## Summary 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. ## Implementation notes - The proof uses `Multiset.erase` and `Multiset.cons` with basic properties of `sum`, `sup`, and `Partition` structures. - The bijection is implemented explicitly via `f` and `g`, and proven mutually inverse via `Subtype.ext`. ## Linting - [x] Passes `lake build` - [x] Linter clean (no commandStart or longLine issues) ## Author Contributed by Yiran Wang. new-contributor t-combinatorics 85/0 Mathlib/Combinatorics/Enumerative/Partition.lean 1 3 ['WangYiran01', 'github-actions'] b-mehta
assignee:b-mehta
29-73214
29 days ago
84-64366
2 months ago
84-64404
84 days
29339 kim-em
author:kim-em
feat: add linter for deprecations on different dates not separated by a blank line Written by claude. Seems to behave correctly, but I have no opinion on the implementation. I can't work out how to test the behaviour using `#guard_msgs`, however. t-linter 198/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/DeprecatedDates.lean,MathlibTest/Linter/DeprecatedDates.lean 4 8 ['adomani', 'github-actions'] nobody
29-71777
29 days ago
29-81838
29 days ago
29-81878
29 days
29307 harahu
author:harahu
doc: hyphenate attributive compound adjectives ending in "exact" Compound adjectives that are attributive (coming before their noun) should almost always be hyphenated in English. This PR covers such adjectives that are ending in "exact". --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 144/144 Mathlib/Algebra/Category/ContinuousCohomology/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Free.lean,Mathlib/Algebra/Homology/ConcreteCategory.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/ExactSequences.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/ExtClass.lean,Mathlib/Algebra/Homology/DerivedCategory/HomologySequence.lean,Mathlib/Algebra/Homology/DerivedCategory/ShortExact.lean,Mathlib/Algebra/Homology/DerivedCategory/SingleTriangle.lean,Mathlib/Algebra/Homology/HomologySequence.lean,Mathlib/Algebra/Homology/HomologySequenceLemmas.lean,Mathlib/Algebra/Homology/HomotopyCategory/DegreewiseSplit.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomologicalFunctor.lean,Mathlib/Algebra/Homology/HomotopyCategory/Pretriangulated.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShortExact.lean,Mathlib/Algebra/Homology/LocalCohomology.lean,Mathlib/Algebra/Homology/ShortComplex/ExactFunctor.lean,Mathlib/Algebra/Homology/ShortComplex/ShortExact.lean,Mathlib/Algebra/Lie/Extension.lean,Mathlib/CategoryTheory/Abelian/DiagramLemmas/KernelCokernelComp.lean,Mathlib/CategoryTheory/Abelian/GrothendieckAxioms/Basic.lean,Mathlib/CategoryTheory/Abelian/GrothendieckCategory/ModuleEmbedding/GabrielPopescu.lean,Mathlib/CategoryTheory/Functor/Flat.lean,Mathlib/CategoryTheory/Limits/ExactFunctor.lean,Mathlib/CategoryTheory/Limits/Preserves/Finite.lean,Mathlib/CategoryTheory/Limits/Preserves/Presheaf.lean,Mathlib/CategoryTheory/ObjectProperty/Extensions.lean,Mathlib/CategoryTheory/Preadditive/AdditiveFunctor.lean,Mathlib/CategoryTheory/Preadditive/LeftExact.lean,Mathlib/CategoryTheory/Shift/ShiftSequence.lean,Mathlib/CategoryTheory/Sites/Grothendieck.lean,Mathlib/CategoryTheory/Sites/LeftExact.lean,Mathlib/CategoryTheory/Sites/MayerVietorisSquare.lean,Mathlib/CategoryTheory/Sites/NonabelianCohomology/H1.lean,Mathlib/CategoryTheory/Sites/Sheafification.lean,Mathlib/CategoryTheory/Triangulated/HomologicalFunctor.lean,Mathlib/GroupTheory/GroupExtension/Defs.lean,Mathlib/GroupTheory/MonoidLocalization/GrothendieckGroup.lean,Mathlib/LinearAlgebra/TensorProduct/RightExactness.lean,Mathlib/RepresentationTheory/Coinvariants.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/LongExactSequence.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/LongExactSequence.lean,Mathlib/RingTheory/DedekindDomain/SelmerGroup.lean,Mathlib/RingTheory/Flat/CategoryTheory.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Finiteness.lean,Mathlib/RingTheory/Regular/IsSMulRegular.lean,Mathlib/Topology/Category/Profinite/Nobeling/Successor.lean 47 n/a ['github-actions'] nobody
29-70881
29 days ago
unknown
unknown
27254 yuanyi-350
author:yuanyi-350
2025 imo problem3 - [x] depends on: #28788 - [x] depends on: #28790 - [x] depends on: #28829 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO 231/0 Archive.lean,Archive/Imo/Imo2025Q3.lean,Mathlib/NumberTheory/Padics/PadicVal/Basic.lean 3 28 ['github-actions', 'jsm28', 'kbuzzard', 'leanprover-community-bot-assistant', 'madvorak', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'themathqueen', 'wwylele', 'yuanyi-350'] jsm28
assignee:jsm28
29-60829
29 days ago
31-10095
1 month ago
64-71360
64 days
26310 kckennylau
author:kckennylau
Binary form This PR provides the basic definition of binary forms, which are homogeneous polynomials in two variables. --- - [ ] depends on: #26312 - [ ] depends on: #26313 - [ ] depends on: #26314 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
73/0 Mathlib.lean,Mathlib/RingTheory/MvPolynomial/BinaryForm.lean 2 13 ['MichaelStollBayreuth', 'github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot', 'ocfnash'] ocfnash
assignee:ocfnash
29-49210
29 days ago
45-38881
1 month ago
57-1104
57 days
27321 kckennylau
author:kckennylau
feat(CategoryTheory): Colimit can be computed fiberwise We consider category `J` equipped with a functor `F : J ⥤ D` to a discrete category `D`. Then the colimit of any diagram `diagram : J ⥤ C` can be computed using the following algorithm: 1. For each `d : D`, compute the colimit of the restricted diagram `F.fiberIncl d ⋙ diagram`. 2. Take the coproduct of these colimits over all `d : D`. We call this "computing the colimit fiberwise". --- Zulip: [#Is there code for X? > over category via a functor](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/over.20category.20via.20a.20functor/with/529574191) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-CI 136/0 Mathlib.lean,Mathlib/CategoryTheory/FiberedCategory/Fiber.lean,Mathlib/CategoryTheory/Limits/Shapes/Fiberwise.lean 3 24 ['github-actions', 'kckennylau', 'robin-carlier'] nobody
29-47093
29 days ago
29-47093
29 days ago
19-15685
19 days
29108 JonBannon
author:JonBannon
feat(MeasureTheory): add `LInfty.lean` with `Mul` and `const` related results. Continuing to develop pieces needed for a `CStarAlgebra` instance for `Lp R ∞ μ`, we introduce a file `MeasureTheory.Function.LInfty.lean` that takes `MeasureTheory.Function.LpSpace.Basic` and `MeasureTheory.Function.Holder` as imports, and introduces the `Mul` instance on Linfty, and const-related results. In a future PR we will handle `One`, as this will require dealing with `AEEqFun` as well as `Lp` level objects and it's probably best to handle these together in a single PR. We opted to add this file to keep imports light, since adding the `Mul` results to `Basic` would require importing `Holder`, and including these results in `Holder` seemed too specific and would make `Holder` heavier. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability awaiting-author 91/0 Mathlib.lean,Mathlib/MeasureTheory/Function/LInfty.lean 2 5 ['JonBannon', 'github-actions', 'j-loreaux'] nobody
29-42094
29 days ago
31-34758
1 month ago
4-12126
4 days
29321 FormulaRabbit81
author:FormulaRabbit81
feat(Topology): obtain new distance structures on pseudo(e)metricspaces --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-CI WIP 130/65 Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Topology/MetricSpace/Basic.lean,Mathlib/Topology/MetricSpace/PiNat.lean,Mathlib/Topology/MetricSpace/Pseudo/Constructions.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean,Mathlib/Topology/MetricSpace/Pseudo/Pi.lean,Mathlib/Topology/MetricSpace/UniformConvergence.lean 8 7 ['FormulaRabbit81', 'YaelDillies', 'github-actions'] nobody
29-15029
29 days ago
29-15029
29 days ago
0-76797
21 hours
22954 eric-wieser
author:eric-wieser
feat(RingTheory/Congruence/Hom): copy from GroupTheory This was motivated in review of #22355, but I no longer recall why. It also helps with #29357. Either way, this captures a definition that was inlined in a later file. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 214/16 Mathlib/Algebra/RingQuot.lean,Mathlib/GroupTheory/Congruence/Hom.lean,Mathlib/RingTheory/Congruence/Defs.lean,Mathlib/RingTheory/Congruence/Hom.lean,Mathlib/RingTheory/TwoSidedIdeal/Kernel.lean 5 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
29-9934
29 days ago
29-9956
29 days ago
140-65219
140 days
27995 kckennylau
author:kckennylau
feat(RingTheory/Valuation): alternate constructors for Valuation --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-CI 82/0 Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/FieldTheory/RatFunc/Degree.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/RingTheory/Valuation/Basic.lean 4 22 ['YaelDillies', 'github-actions', 'grunweg', 'kckennylau', 'pechersky'] nobody
28-72342
28 days ago
28-72342
28 days ago
18-47707
18 days
26277 AntoineChambert-Loir
author:AntoineChambert-Loir
feat(RingTheory/Congruence/Hom): prove basic isomorphisms theorems for ring congruences This file contains elementary definitions involving congruence relations and morphisms for semirings, rings, and algebras. * `RingCon.ker`: the kernel of a monoid homomorphism as a congruence relation * `RingCon.lift`, `RingCon.liftₐ`: the homomorphism / the algebra morphism on the quotient given that the congruence is in the kernel * `RingCon.map`, `RingCon.mapₐ`: homomorphism / algebra morphism from a smaller to a larger quotient * `RingCon.quotientKerEquivRangeS`, `RingCon.quotientKerEquivRange`, `RingCon.quotientKerEquivRangeₐ` : the first isomorphism theorem for semirings (using `RingHom.rangeS`), rings (using `RingHom.range`) and algebras (using `AlgHom.range`). * `RingCon.comapQuotientEquivRangeS`, `RingCon.comapQuotientEquivRange`, `RingCon.comapQuotientEquivRangeₐ` : the second isomorphism theorem for semirings (using `RingHom.rangeS`), rings (using `RingHom.range`) and algebras (using `AlgHom.range`). * `RingCon.quotientQuotientEquivQuotient`, `RingCon.quotientQuotientEquivQuotientₐ` : the third isomorphism theorem for semirings (or rings) and algebras It is an adaptation of what existed for multiplicative congruences (docs#Con) and is only useful for semirings which are not rings. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 554/2 Mathlib.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/RingTheory/Congruence/Defs.lean,Mathlib/RingTheory/Congruence/Hom.lean 5 4 ['AntoineChambert-Loir', 'eric-wieser', 'github-actions'] joneugster
assignee:joneugster
28-71061
28 days ago
59-63447
1 month ago
103-19663
103 days
28613 espottesmith
author:espottesmith
feat(Combinatorics): define undirected hypergraphs This PR defines undirected hypergraphs: ``` @[ext] structure Hypergraph (α : Type*) where /-- The vertex set -/ vertexSet : Set α /-- The hyperedge set -/ hyperedgeSet : Set (Set α) /-- All hyperedges must be subsets of the vertex set -/ hyperedge_isSubset_vertexSet : ∀ ⦃e⦄, e ∈ hyperedgeSet → e ⊆ vertexSet ``` In addition to the main definition, some additional definitions and related lemmas are provided: - vertex adjacency - hyperedge adjacency - vertex "stars" - special cases (loops, empty hypergraphs, trivial hypergraphs, complete hypergraphs, simple hypergraphs, k-uniform hypergraphs, and d-regular hypergraphs) - (some) hypergraph cardinality - subhypergraphs, induced subhypergraphs, and partial hypergraphs This implementation is certainly bare-bones. I'm submitting this PR at this point, rather than when my developments are more fleshed out, because there has been some interest in others contributing to hypergraph formalization in mathlib. In the near future, goals include: - defining incidence matrices (i.e., conversion from `Hypergraph α` to `Matrix α (Set α) β` - coersion/generalization of graph as 2-uniform hypergraph - conversion of a hypergraph into its associated clique graph/two-section graph - constructing the dual of a hypergraph (note: on first blush, this appears somewhat challenging, given that we define hyperedges as `Set α` rather than some other type `β`) - rank and co-rank - walks, paths, cycles, etc. on hypergraphs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 375/0 Mathlib.lean,Mathlib/Combinatorics/Hypergraph/Basic.lean 2 52 ['b-mehta', 'espottesmith', 'github-actions', 'jt496', 'lauramonk', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
28-60457
28 days ago
28-60457
28 days ago
34-46641
34 days
29028 themathqueen
author:themathqueen
feat(Algebra/Star): define `unitary R →* StarAlgEquiv S R R` Every unitary defines a star-algebra automorphism (this is an extension of a special version of `MulSemiringAction.toRingEquiv` for unitaries). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
64/0 Mathlib.lean,Mathlib/Algebra/Star/UnitaryStarAlgAut.lean 2 14 ['eric-wieser', 'github-actions', 'themathqueen'] eric-wieser
assignee:eric-wieser
28-39053
28 days ago
35-62942
1 month ago
37-33549
37 days
28836 yury-harmonic
author:yury-harmonic
feat: add `norm_num` extensions Add `norm_num` extensions for - `Int.negOfNat`; - `Nat.floor`, `Nat.ceil`, `Int.fract`, and `Int.round`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author 319/7 Mathlib/Algebra/Order/Floor/Semiring.lean,Mathlib/Data/NNRat/Floor.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Tactic/NormNum/Basic.lean,MathlibTest/norm_num_ext.lean 5 8 ['Ruben-VandeVelde', 'digama0', 'eric-wieser', 'github-actions'] j-loreaux
assignee:j-loreaux
28-37901
28 days ago
28-37901
28 days ago
12-38307
12 days
26339 mans0954
author:mans0954
feat(Analysis/Normed/Module/WeakDual): Banach Dieudonné Lemma This PR continues the work from #16316. Original PR: https://github.com/leanprover-community/mathlib4/pull/16316 large-import t-analysis WIP 377/3 Mathlib/Analysis/LocallyConvex/AbsConvex.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/Normed/Module/WeakDual.lean,Mathlib/Topology/UniformSpace/Cauchy.lean 4 n/a ['github-actions', 'mans0954', 'mathlib4-merge-conflict-bot'] nobody
28-33938
28 days ago
unknown
unknown
29355 girving
author:girving
feat(Trigonometric): Taylor series bounds for sin and cos Zulip discussion here: https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Better.20.60Real.2Esin.60.20bounds/near/535035576 We also include the full set of intervals on which sin and cos are monotone/antitone. --- Questions to resolve as part of review: 1. I've left the `Finset.sum_range_even` in the new `SeriesBounds` file, but presumably it should go somewhere else (unless you want me to inline it, but that seems worse). 2. Is putting the new Taylor series bounds in a new `SeriesBounds` file right, or should it go in the current `Bounds.lean` file? When I started writing the PR I thought the new bounds would need more imports via more analysis, but it turns out the only new import needed would be `Mathlib.Algebra.BigOperators.Field` which seems lightweight. I am happy with whatever the preference is in terms of file structure. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 158/0 Mathlib.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Bounds.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/SeriesBounds.lean 4 24 ['Parcly-Taxel', 'Ruben-VandeVelde', 'girving', 'github-actions', 'llllvvuu'] nobody
28-28754
28 days ago
29-16979
29 days ago
29-22858
29 days
19046 j-loreaux
author:j-loreaux
feat: define class `SemigroupAction` --- If I can get this building with minimal performance impact, I would like to change the names to: `MulAction → MonoidAction` `SemigroupAction → MulAction` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
48/26 Mathlib/Algebra/Azumaya/Matrix.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/Hom.lean,Mathlib/Algebra/Group/Action/Prod.lean,Mathlib/Algebra/Group/Action/TypeTags.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/GroupTheory/CoprodI.lean,Mathlib/LinearAlgebra/Eigenspace/Matrix.lean,Mathlib/LinearAlgebra/FreeModule/Finite/Quotient.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/NumberTheory/ModularForms/CongruenceSubgroups.lean,Mathlib/RingTheory/Trace/Basic.lean 13 10 ['alreadydone', 'github-actions', 'j-loreaux', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'urkud'] jcommelin
assignee:jcommelin
28-8013
28 days ago
36-24243
1 month ago
42-51530
42 days
28311 eric-wieser
author:eric-wieser
fix(Tactic/NormNum): do not hang on large powers This uses `Lean.checkExponent` to guard against large powers. Unfortunately the log messages it emits are currently swallowed, but surfacing these may require changing the API for norm_num extensions (to live in `OptionT MetaM`) and so is left to future work. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta bug 41/23 Mathlib/Tactic/NormNum/Pow.lean,Mathlib/Tactic/Ring/Basic.lean,MathlibTest/norm_num.lean,MathlibTest/norm_num_ext.lean 4 4 ['github-actions', 'mathlib4-merge-conflict-bot'] robertylewis
assignee:robertylewis
28-8011
28 days ago
37-14667
1 month ago
44-67883
44 days
29040 PMKielstra
author:PMKielstra
feat: trapezoidal rule for integration This PR defines the trapezoidal rule and proves the standard error bound on it in terms of bounds on the second derivative. I have vague plans of using this plus interval arithmetic to develop a tactic that can automatically close goals of the form `\integral x in a..b, f x < y` or similar. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability 273/0 Mathlib.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/TrapezoidalRule.lean 3 40 ['PMKielstra', 'github-actions', 'tb65536'] kex-y
assignee:kex-y
28-8007
28 days ago
37-14900
1 month ago
37-15339
37 days
29042 vihdzp
author:vihdzp
feat(SetTheory/Ordinal/Exponential): generalize theorems from `y = succ x` to `x < y` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 18/6 Mathlib/SetTheory/Ordinal/Exponential.lean 1 1 ['github-actions'] b-mehta
assignee:b-mehta
28-8006
28 days ago
37-4648
1 month ago
37-4634
37 days
29082 grunweg
author:grunweg
RFC: tag `IsInducing` and `Is{Open,Closed,}Embedding` with `fun_prop` I have not tested if this is usable in practice; perhaps it is not. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 37/5 Mathlib/Topology/Constructions.lean,Mathlib/Topology/Defs/Induced.lean,Mathlib/Topology/Maps/Basic.lean 3 1 ['github-actions'] jcommelin
assignee:jcommelin
28-8004
28 days ago
36-26656
1 month ago
36-26689
36 days
26159 upobir
author:upobir
feat(Algebra/QuadraticDiscriminant): Adding inequalities on quadratic from inequalities on discriminant This PR continues the work from #24517. Original PR: https://github.com/leanprover-community/mathlib4/pull/24517 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
34/0 Mathlib/Algebra/QuadraticDiscriminant.lean 1 8 ['chrisflav', 'github-actions', 'tb65536', 'upobir'] chrisflav
assignee:chrisflav
27-45246
27 days ago
51-36774
1 month ago
55-10605
55 days
28389 euprunin
author:euprunin
chore(Algebra/Group/Subgroup): golf entire `subgroupOf_sup` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
2/6 Mathlib/Algebra/Group/Subgroup/Ker.lean 1 3 ['Ruben-VandeVelde', 'chrisflav', 'euprunin', 'github-actions'] chrisflav
assignee:chrisflav
27-42830
27 days ago
27-42830
27 days ago
23-37322
23 days
28305 euprunin
author:euprunin
chore(RingTheory/MvPolynomial): deprecate `weightedHomogeneousComponent_of_isWeightedHomogeneous_same` and golf entire `weightedHomogeneousComponent_of_isWeightedHomogeneous_ne` ---
Show trace profiling of weightedHomogeneousComponent_of_isWeightedHomogeneous_same: 12 ms before, <10 ms after 🎉 ### Trace profiling of `weightedHomogeneousComponent_of_isWeightedHomogeneous_same` before PR 28305 ```diff diff --git a/Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean b/Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean index 6490df8bf8..1bdb4d75ae 100644 --- a/Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean +++ b/Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean @@ -434,2 +434,3 @@ theorem weightedHomogeneousComponent_of_mem [DecidableEq M] {m n : M} +set_option trace.profiler true in theorem weightedHomogeneousComponent_of_isWeightedHomogeneous_same ``` ``` ℹ [1208/1208] Built Mathlib.RingTheory.MvPolynomial.WeightedHomogeneous info: Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean:436:0: [Elab.async] [0.012999] elaborating proof of MvPolynomial.weightedHomogeneousComponent_of_isWeightedHomogeneous_same [Elab.definition.value] [0.012383] MvPolynomial.weightedHomogeneousComponent_of_isWeightedHomogeneous_same [Elab.step] [0.012139] classical ext x rw [coeff_weightedHomogeneousComponent] by_cases zero_coeff : coeff x p = 0 · simp [zero_coeff] · rw [hp zero_coeff, if_pos rfl] [Elab.step] [0.012134] classical ext x rw [coeff_weightedHomogeneousComponent] by_cases zero_coeff : coeff x p = 0 · simp [zero_coeff] · rw [hp zero_coeff, if_pos rfl] [Elab.step] [0.012128] classical ext x rw [coeff_weightedHomogeneousComponent] by_cases zero_coeff : coeff x p = 0 · simp [zero_coeff] · rw [hp zero_coeff, if_pos rfl] [Elab.step] [0.012045] ext x rw [coeff_weightedHomogeneousComponent] by_cases zero_coeff : coeff x p = 0 · simp [zero_coeff] · rw [hp zero_coeff, if_pos rfl] [Elab.step] [0.012034] ext x rw [coeff_weightedHomogeneousComponent] by_cases zero_coeff : coeff x p = 0 · simp [zero_coeff] · rw [hp zero_coeff, if_pos rfl] Build completed successfully. ``` ### Trace profiling of `weightedHomogeneousComponent_of_isWeightedHomogeneous_same` after PR 28305 ```diff diff --git a/Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean b/Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean index 6490df8bf8..df101a703d 100644 --- a/Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean +++ b/Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean @@ -434,11 +434,7 @@ theorem weightedHomogeneousComponent_of_mem [DecidableEq M] {m n : M} +set_option trace.profiler true in theorem weightedHomogeneousComponent_of_isWeightedHomogeneous_same {m : M} {p : MvPolynomial σ R} (hp : IsWeightedHomogeneous w p m) : - weightedHomogeneousComponent w m p = p := by - classical - ext x - rw [coeff_weightedHomogeneousComponent] - by_cases zero_coeff : coeff x p = 0 - · simp [zero_coeff] - · rw [hp zero_coeff, if_pos rfl] + weightedHomogeneousComponent w m p = p := + IsWeightedHomogeneous.weightedHomogeneousComponent_same hp @@ -446,9 +442,4 @@ theorem weightedHomogeneousComponent_of_isWeightedHomogeneous_ne {m n : M} {p : MvPolynomial σ R} (hp : IsWeightedHomogeneous w p m) (hn : n ≠ m) : - weightedHomogeneousComponent w n p = 0 := by - classical - ext x - rw [coeff_weightedHomogeneousComponent] - by_cases zero_coeff : coeff x p = 0 - · simp [zero_coeff] - · rw [if_neg (by simp only [hp zero_coeff, hn.symm, not_false_eq_true]), coeff_zero] + weightedHomogeneousComponent w n p = 0 := + IsWeightedHomogeneous.weightedHomogeneousComponent_ne n hp hn ``` ``` ✔ [1208/1208] Built Mathlib.RingTheory.MvPolynomial.WeightedHomogeneous Build completed successfully. ```
---
Show trace profiling of weightedHomogeneousComponent_of_isWeightedHomogeneous_ne: 13 ms before, <10 ms after 🎉 ### Trace profiling of `weightedHomogeneousComponent_of_isWeightedHomogeneous_ne` before PR 28305 ```diff diff --git a/Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean b/Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean index 6490df8bf8..b83c5c6269 100644 --- a/Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean +++ b/Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean @@ -444,2 +444,3 @@ theorem weightedHomogeneousComponent_of_isWeightedHomogeneous_same +set_option trace.profiler true in theorem weightedHomogeneousComponent_of_isWeightedHomogeneous_ne ``` ``` ℹ [1208/1208] Built Mathlib.RingTheory.MvPolynomial.WeightedHomogeneous info: Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean:446:0: [Elab.async] [0.013611] elaborating proof of MvPolynomial.weightedHomogeneousComponent_of_isWeightedHomogeneous_ne [Elab.definition.value] [0.012857] MvPolynomial.weightedHomogeneousComponent_of_isWeightedHomogeneous_ne [Elab.step] [0.012517] classical ext x rw [coeff_weightedHomogeneousComponent] by_cases zero_coeff : coeff x p = 0 · simp [zero_coeff] · rw [if_neg (by simp only [hp zero_coeff, hn.symm, not_false_eq_true]), coeff_zero] [Elab.step] [0.012512] classical ext x rw [coeff_weightedHomogeneousComponent] by_cases zero_coeff : coeff x p = 0 · simp [zero_coeff] · rw [if_neg (by simp only [hp zero_coeff, hn.symm, not_false_eq_true]), coeff_zero] [Elab.step] [0.012508] classical ext x rw [coeff_weightedHomogeneousComponent] by_cases zero_coeff : coeff x p = 0 · simp [zero_coeff] · rw [if_neg (by simp only [hp zero_coeff, hn.symm, not_false_eq_true]), coeff_zero] [Elab.step] [0.012450] ext x rw [coeff_weightedHomogeneousComponent] by_cases zero_coeff : coeff x p = 0 · simp [zero_coeff] · rw [if_neg (by simp only [hp zero_coeff, hn.symm, not_false_eq_true]), coeff_zero] [Elab.step] [0.012443] ext x rw [coeff_weightedHomogeneousComponent] by_cases zero_coeff : coeff x p = 0 · simp [zero_coeff] · rw [if_neg (by simp only [hp zero_coeff, hn.symm, not_false_eq_true]), coeff_zero] Build completed successfully. ``` ### Trace profiling of `weightedHomogeneousComponent_of_isWeightedHomogeneous_ne` after PR 28305 ```diff diff --git a/Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean b/Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean index 6490df8bf8..066f4824e9 100644 --- a/Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean +++ b/Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean @@ -436,19 +436,10 @@ theorem weightedHomogeneousComponent_of_isWeightedHomogeneous_same {m : M} {p : MvPolynomial σ R} (hp : IsWeightedHomogeneous w p m) : - weightedHomogeneousComponent w m p = p := by - classical - ext x - rw [coeff_weightedHomogeneousComponent] - by_cases zero_coeff : coeff x p = 0 - · simp [zero_coeff] - · rw [hp zero_coeff, if_pos rfl] + weightedHomogeneousComponent w m p = p := + IsWeightedHomogeneous.weightedHomogeneousComponent_same hp +set_option trace.profiler true in theorem weightedHomogeneousComponent_of_isWeightedHomogeneous_ne {m n : M} {p : MvPolynomial σ R} (hp : IsWeightedHomogeneous w p m) (hn : n ≠ m) : - weightedHomogeneousComponent w n p = 0 := by - classical - ext x - rw [coeff_weightedHomogeneousComponent] - by_cases zero_coeff : coeff x p = 0 - · simp [zero_coeff] - · rw [if_neg (by simp only [hp zero_coeff, hn.symm, not_false_eq_true]), coeff_zero] + weightedHomogeneousComponent w n p = 0 := + IsWeightedHomogeneous.weightedHomogeneousComponent_ne n hp hn ``` ``` ✔ [1208/1208] Built Mathlib.RingTheory.MvPolynomial.WeightedHomogeneous Build completed successfully. ```
--- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/)
t-ring-theory awaiting-author 6/17 Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean 1 4 ['chrisflav', 'github-actions', 'mattrobball'] chrisflav
assignee:chrisflav
27-42630
27 days ago
27-42630
27 days ago
24-72362
24 days
28140 YaelDillies
author:YaelDillies
feat: a `PointedCone`-valued version of `Submodule.span` This is merely to guide typing. From Toric --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry toric 11/2 Mathlib/Geometry/Convex/Cone/Dual.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
27-40538
27 days ago
27-40569
27 days ago
55-35458
55 days
28970 Whysoserioushah
author:Whysoserioushah
feat(Algebra/Algebra/ReducedNorm) : Defines reduced norm and trace TODO : 1. add the theorem proving reduced charpoly is independent from the choice of AlgEquiv (blocked by this [discussion](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Algebra.2ETensorProduct.2Eassoc/with/536349758)) 2. prove reduced charpoly is "actually" in the polynomial ring of base field (blocked by this [discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.E2.9C.94.20Refactor.20Subfield)) therefore content about this topic is basically the best I could do for now :-( --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
66/0 Mathlib.lean,Mathlib/Algebra/Algebra/ReducedNorm.lean 2 15 ['Whysoserioushah', 'chrisflav', 'eric-wieser', 'github-actions', 'kbuzzard'] chrisflav
assignee:chrisflav
27-39354
27 days ago
27-40702
27 days ago
38-42079
38 days
28339 JovanGerb
author:JovanGerb
feat(gcongr): support `@[gcongr]` for `Monotone` and friends This PR adds the feature to `gcongr` that you can now tag lemmas whose conclusion is `Monotone f`, `Antitone f`, etc. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 119/88 Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semiring.lean,Mathlib/Algebra/Order/Module/Algebra.lean,Mathlib/Algebra/Order/Ring/Cast.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/SpecialFunctions/Log/ERealExp.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Arctan.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Multiset/Defs.lean,Mathlib/Data/Nat/Cast/Order/Basic.lean,Mathlib/Data/Rat/Cast/Order.lean,Mathlib/Data/Real/Sqrt.lean,Mathlib/LinearAlgebra/Basis/Flag.lean,Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/Order/Filter/Map.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Tactic/GCongr/Core.lean,MathlibTest/GCongr/inequalities.lean 20 4 ['github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] adamtopaz
assignee:adamtopaz
27-7998
27 days ago
38-42628
1 month ago
51-12845
51 days
28833 yury-harmonic
author:yury-harmonic
feat(MvPolynomial/Expand): more lemmas --- - [x] depends on: #28832 - [x] depends on: #28830 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 88/18 Mathlib/Algebra/MvPolynomial/Eval.lean,Mathlib/Algebra/MvPolynomial/Expand.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] dwrensha
assignee:dwrensha
27-7996
27 days ago
40-24737
1 month ago
40-26487
40 days
29212 Whysoserioushah
author:Whysoserioushah
feat(Algebra/CrossProductAlgebra/Defs) : Define Cross Product Algebra PS: All to-dos listed in the file has been fully sorry-freed and will be (slowly) upstreamed by either me or Yaël Co-authored-by: Yaël Dillies Co-authored-by: Jujian Zhang --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
270/0 Mathlib.lean,Mathlib/RepresentationTheory/CrossProductAlgebra/Defs.lean,docs/references.bib 3 8 ['Whysoserioushah', 'YaelDillies', 'eric-wieser', 'github-actions'] nobody
26-68906
26 days ago
26-68906
26 days ago
5-63264
5 days
28511 YaelDillies
author:YaelDillies
feat(Finsupp): `congr!`-compatible version of `prod_congr` `congr!` doesn't like the `g1 x (f x)` appearing in the hypothesis of `Finsupp.prod_congr`: `f x` isn't a free variable. Note: A few proofs broke due to `simp` using `congr` lemmas internally. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
17/11 Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/Category/MonCat/Adjunctions.lean,Mathlib/Data/Finsupp/Multiset.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/LowDegree.lean 5 12 ['JovanGerb', 'YaelDillies', 'eric-wieser', 'github-actions', 'kmill'] kmill
assignee:kmill
26-59091
26 days ago
48-65546
1 month ago
48-65581
48 days
24669 qawbecrdtey
author:qawbecrdtey
feat(Analysis/Normed/Operator/LinearIsometry): added definition `LinearIsometryEquiv.prodComm` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This commit defines a `LinearIsometryEquiv`, and states some trivial theorems about it. ```lean def prodComm [Module R E₂] : E × E₂ ≃ₗᵢ[R] E₂ × E ``` maintainer-merge t-analysis awaiting-author 8/1 Mathlib/Analysis/Normed/Operator/LinearIsometry.lean 1 12 ['Ruben-VandeVelde', 'eric-wieser', 'faenuccio', 'github-actions', 'j-loreaux', 'jcommelin', 'qawbecrdtey'] faenuccio
assignee:faenuccio
26-6041
26 days ago
115-80273
3 months ago
32-83569
32 days
28384 euprunin
author:euprunin
chore(Algebra/Order/Ring): golf entire `cast_natAbs` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
1/4 Mathlib/Algebra/Order/Ring/Cast.lean 1 2 ['github-actions', 'riccardobrasca'] riccardobrasca
assignee:riccardobrasca
25-48910
25 days ago
25-48910
25 days ago
25-31928
25 days
28385 euprunin
author:euprunin
chore(Algebra/BigOperators/Finsupp): deprecate `Finsupp.sum_sum_index'` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
1/4 Mathlib/Algebra/BigOperators/Finsupp/Basic.lean 1 7 ['euprunin', 'github-actions', 'riccardobrasca'] riccardobrasca
assignee:riccardobrasca
25-48887
25 days ago
25-48887
25 days ago
25-31871
25 days
27701 vihdzp
author:vihdzp
feat: `a < b + c ↔ a < b ∨ ∃ d < c, a = b + d` ...and analogous results on `CanonicallyOrderedAdd`. --- - [x] depends on: #29084 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
41/0 Mathlib/Algebra/Order/Monoid/Canonical/Basic.lean 1 5 ['YaelDillies', 'github-actions', 'mathlib4-dependent-issues-bot', 'vihdzp'] nobody
25-48133
25 days ago
25-48173
25 days ago
0-42619
11 hours
26881 emo916math
author:emo916math
feat(Analysis/Calculus/Deriv/Star) A formula for `deriv (conj ∘ f ∘ conj)` Added a lemma that `deriv (conj ∘ f ∘ conj) = conj ∘ deriv f ∘ conj`, proved by cases on whether the derivative mathematically exists or not. This PR replaces [#26805](https://github.com/leanprover-community/mathlib4/pull/26805); see discussion there. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis awaiting-author 50/2 Mathlib/Analysis/Calculus/Deriv/Star.lean 1 15 ['emo916math', 'github-actions', 'j-loreaux', 'kckennylau'] j-loreaux
assignee:j-loreaux
25-42082
25 days ago
56-41636
1 month ago
31-70593
31 days
24533 robertmaxton42
author:robertmaxton42
feat (ULift): conjugation by ULift.up/down, misc cast/heq lemmas * Adds the convenience def `ULift.conj x := `down (f (up x))`, and corresponding basic lemmas * Adds lemmas showing that `ULift.up` and `.down` commute with casts and preserve `HEq`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-author 31/0 Mathlib/Data/ULift.lean 1 23 ['eric-wieser', 'github-actions', 'grunweg', 'robertmaxton42'] nobody
25-39891
25 days ago
36-69906
1 month ago
118-2181
118 days
26453 jburroni
author:jburroni
feat(Data/PNat/Basic): add order-related instances to PNat Add `SuccAddOrder ℕ+` and `NoMaxOrder ℕ+` instances. This allows, for example, the use of lemmas related to `Intervals` built with ℕ+. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 31/0 Mathlib.lean,Mathlib/Data/PNat/Order.lean 2 14 ['Ruben-VandeVelde', 'eric-wieser', 'github-actions', 'jburroni', 'vihdzp'] ericrbg
assignee:ericrbg
25-33873
25 days ago
25-38877
25 days ago
95-41188
95 days
29435 sgouezel
author:sgouezel
WIP: typeclass experiment --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra WIP
label:t-algebra$
33/7 Mathlib/Algebra/QuadraticAlgebra.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/GroupTheory/GroupAction/Hom.lean 3 5 ['eric-wieser', 'github-actions', 'leanprover-bot', 'sgouezel'] nobody
25-30314
25 days ago
25-61352
25 days ago
0-1
1 second
26462 PSchwahn
author:PSchwahn
feat(LinearAlgebra/Projection): add results about inverse of `Submodule.prodEquivOfIsCompl` Add two theorems `Submodule.prodEquivOfIsCompl_symm_apply` and `Submodule.prodEquivOfIsCompl_symm_add`, which are API for `Submodule.prodEquivOfIsCompl`. We believe these theorems are useful; for example, we have used their statements in a [classification formalization project](https://github.com/LieLean/LowDimSolvClassification). Co-authored by: - [Viviana del Barco](https://github.com/vdelbarc) - [Gustavo Infanti](https://github.com/GuQOliveira) - [Exequiel Rivas](https://github.com/erivas) --- I am not sure whether the `prodEquivOfIsCompl_symm_apply` theorem should be tagged with `@[simp]`; this might lead to confluence issues. Opinions are welcome! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra awaiting-author
label:t-algebra$
10/0 Mathlib/LinearAlgebra/Projection.lean 1 7 ['PSchwahn', 'github-actions', 'joelriou', 'kckennylau'] joelriou
assignee:joelriou
25-12151
25 days ago
25-43254
25 days ago
73-43225
73 days
28248 YaelDillies
author:YaelDillies
feat: expectation and (conditional) variance of a Bernoulli random variable Compute the expectation, variance, conditional variance of a Bernoulli random variable. From MiscYD --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability awaiting-author 240/0 Mathlib.lean,Mathlib/MeasureTheory/Integral/Bochner/Set.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/Probability/Bernoulli.lean,Mathlib/Probability/HasLaw.lean,Mathlib/Probability/Moments/Variance.lean 6 34 ['DavidLedvinka', 'RemyDegenne', 'YaelDillies', 'github-actions', 'kex-y', 'pfaffelh', 'themathqueen'] kex-y
assignee:kex-y
24-72103
24 days ago
24-72103
24 days ago
28-39091
28 days
29434 ntapiam
author:ntapiam
feat(NonAssoc/LieAdmissible): prove every ring/algebra is LieAdmissible -awaiting-author new-contributor t-algebra
label:t-algebra$
27/6 Mathlib/Algebra/NonAssoc/LieAdmissible/Defs.lean 1 1 ['github-actions'] nobody
24-69930
24 days ago
25-62706
25 days ago
25-62746
25 days
28950 Vierkantor
author:Vierkantor
fix(TacticAnalysis): comment out syntax range check In #28802 we discovered the tactic analysis framework does not fire on declarations using `where` clauses. The reason is that `def foo where ...` gets turned into `def foo := { ... }`, and the `{ ... }` syntax is assigned a range outside of the `where ...` syntax; this causes the syntax range check to omit the whole declaration body. I am not entirely sure this is a bug in Lean or it was a misuse of ranges; in the meantime it should be okay to skip the check: the worst that happens is we analyze a piece of syntax outside of the declaration, which we'd get to later anyway. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 23/3 Mathlib/Tactic/TacticAnalysis.lean,MathlibTest/TacticAnalysis.lean 2 3 ['Vierkantor', 'github-actions', 'thorimur'] robertylewis
assignee:robertylewis
24-43721
24 days ago
38-62457
1 month ago
38-62436
38 days
27567 themathqueen
author:themathqueen
feat(LinearAlgebra/TensorProduct/Associator): add `lid` and `assoc` tensor lemmas This adds `TensorProduct.lid_tensor` and `TensorProduct.assoc_tensor`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra easy
label:t-algebra$
31/2 Mathlib/LinearAlgebra/TensorProduct/Associator.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean 2 3 ['github-actions', 'themathqueen'] mattrobball
assignee:mattrobball
24-40057
24 days ago
54-29580
1 month ago
68-22410
68 days
26909 gasparattila
author:gasparattila
feat(LinearAlgebra/Projectivization/Subspace): correspondence between linear and projective subspaces --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra
label:t-algebra$
69/3 Mathlib/LinearAlgebra/Projectivization/Subspace.lean 1 5 ['eric-wieser', 'gasparattila', 'github-actions'] Vierkantor
assignee:Vierkantor
24-32975
24 days ago
87-25605
2 months ago
87-25647
87 days
28286 bwangpj
author:bwangpj
feat(Geometry/Manifold/ContMDiff): basic lemmas for analytic (`C^ω`) functions Add basic lemmas relating `ContMDiff` in the `C^ω` case to being `Analytic` on charts. This is upstreamed from [https://github.com/girving/ray](https://github.com/girving/ray). Co-authored-by: Geoffrey Irving --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-differential-geometry awaiting-author 36/0 Mathlib/Geometry/Manifold/ContMDiff/Defs.lean 1 13 ['bwangpj', 'girving', 'github-actions', 'grunweg', 'kbuzzard', 'sgouezel'] sgouezel
assignee:sgouezel
24-26906
24 days ago
24-67341
24 days ago
27-76128
27 days
26614 Rida-Hamadani
author:Rida-Hamadani
feat(SimpleGraph): add more API for `take`/`drop` These came up while proving the Girth-Diameter inequality. The main lemma proves that taking `n` vertices of a walk results in a sub-walk of taking `k` vertices when `n` is less than or equal to `k`. The sub-walk relation is represented as `p.support.Sublist q.support` where `p` and `q` are walks. - [ ] depends on: #26655 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics awaiting-author 74/0 Mathlib/Combinatorics/SimpleGraph/Walk.lean 1 18 ['Rida-Hamadani', 'b-mehta', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
24-15784
24 days ago
24-15816
24 days ago
4-83551
4 days
26331 Timeroot
author:Timeroot
feat(Algebra/Polynomial): Descartes' Rule of signs This PR continues the work from #23681. Original PR: https://github.com/leanprover-community/mathlib4/pull/23681 t-algebra
label:t-algebra$
467/3 Mathlib.lean,Mathlib/Algebra/Polynomial/CoeffList.lean,Mathlib/Algebra/Polynomial/Degree/Operations.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Polynomial/RuleOfSigns.lean,Mathlib/Data/Sign/Defs.lean 6 27 ['Ruben-VandeVelde', 'Timeroot', 'adomani', 'chrisflav', 'github-actions'] adomani
assignee:adomani
23-85133
23 days ago
102-716
3 months ago
102-754
102 days
28124 kckennylau
author:kckennylau
feat(Tactic): Call an arbitrary Simproc In the current framework, `Simproc`s are declared by name, and can only be referred to by name. For example, [Nat.divisors_ofNat](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Tactic/Simproc/Divisors.html#Nat.divisors_ofNat) is declared as: ```lean dsimproc_decl Nat.divisors_ofNat (Nat.divisors _) := fun e => do ``` This declaration syntax does not allow for a `Simproc` to depend on any arguments, and even if one constructed a `Simproc` that depends on e.g. a natural number, such as `foo : ℕ → Simproc`, one still cannot call it using the syntax `by simp [foo 37]`. Therefore, this new function aims to solve this problem, by allowing an arbitrary `Simproc` to be executed, using the newly defined function `Lean.Meta.Simp.Simproc.apply (s : Simproc) : TacticM Unit`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 79/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Simproc/Apply.lean,MathlibTest/Simproc/Apply.lean 4 27 ['JovanGerb', 'b-mehta', 'eric-wieser', 'github-actions', 'hrmacbeth', 'kckennylau'] JovanGerb
assignee:JovanGerb
23-60826
23 days ago
29-32387
29 days ago
47-2048
47 days
29514 grunweg
author:grunweg
More strict mode --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI WIP 192/33 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/ValidatePRTitle.lean,lakefile.lean,scripts/README.md,scripts/check_title_labels.lean 10 1 ['github-actions'] nobody
23-31188
23 days ago
23-31255
23 days ago
0-1
1 second
29527 kim-em
author:kim-em
feat: script for checking Github URLs This adds scripts/check_github_urls.py, which checks for links for closed github issues/prs, and shows the context at the link. Of course, many links are to closed pull requests because the discussion there provides useful context. Not sure how to best filter results. CI WIP 475/0 scripts/README.md,scripts/check_github_urls.py 2 2 ['github-actions', 'kim-em'] nobody
23-5530
23 days ago
23-6210
23 days ago
0-1
1 second
27098 Paul-Lez
author:Paul-Lez
feat(Algebra/Category/ModuleCat/Sheaf/VectorBundle): define vector bundles This PR defines vector bundles (upstreamed from [formal-conjectures](https://github.com/google-deepmind/formal-conjectures/pull/28/files)). I plan on adding some more API about the definition in this PR, but figured it would be nice to get some initial feedback about the definition before doing so! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
53/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/VectorBundle.lean 2 4 ['Kiolt', 'Raph-DG', 'chrisflav', 'github-actions'] chrisflav
assignee:chrisflav
22-58301
22 days ago
65-25982
2 months ago
16-82639
16 days
28266 euprunin
author:euprunin
chore(RingTheory): golf entire `single_one_eq_pow` using `simp` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author 1/5 Mathlib/RingTheory/LaurentSeries.lean 1 6 ['eric-wieser', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
22-43237
22 days ago
22-43255
22 days ago
0-11379
3 hours
25778 thefundamentaltheor3m
author:thefundamentaltheor3m
feat: Monotonicity of `setIntegral` for nonnegative functions This PR makes it easier to prove monotonicity of the Bochner integral on sets for nonnegative functions by removing the stronger assumption required by the general monotonicity lemma that both of the functions being compared must be integrable. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability awaiting-author 8/0 Mathlib/MeasureTheory/Integral/Bochner/Set.lean 1 6 ['RemyDegenne', 'github-actions', 'sgouezel', 'thefundamentaltheor3m'] nobody
22-42775
22 days ago
113-50608
3 months ago
0-11893
3 hours
26370 b-mehta
author:b-mehta
chore(Archive): golf and generalise ascending-descending sequences This proof was 5 years old, not in a good generality, and overly long. We fix the latter two points. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data delegated 96/120 Archive/Wiedijk100Theorems/AscendingDescendingSequences.lean 1 13 ['b-mehta', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-bors'] ericrbg
assignee:ericrbg
22-34608
22 days ago
22-34608
22 days ago
78-81111
78 days
26955 mariainesdff
author:mariainesdff
feat(LinearAlgebra/OnSup): extend linear maps to sums of modules Let `A` be a ring, `X, Y` be `A`-modules, and `M, N` be `A`-submodules of `X`. Given two linear maps `f : M →ₗ[A] Y` and `g : N →ₗ[A] Y` that agree on `M ∩ N`, there is a unique linear map `M + N →ₗ[A] Y` that simultaneously extends `f` and `g`. Co-authored-by: @AntoineChambert-Loir --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
153/0 Mathlib.lean,Mathlib/LinearAlgebra/OnSup.lean 2 16 ['AntoineChambert-Loir', 'eric-wieser', 'github-actions', 'j-loreaux', 'wwylele'] alreadydone
assignee:alreadydone
22-34070
22 days ago
22-34070
22 days ago
59-73968
59 days
26398 ChrisHughes24
author:ChrisHughes24
feat(ModelTheory): definable functions --- Possibly this should be generalized to partial functions. I migrated the PR by hand instead of using the script. - [x] depends on: #20166 - [x] depends on: #20161 - [x] depends on: #20115 - [x] depends on: #20174 - [x] depends on: #20175 - [x] depends on: #21948 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 618/0 Mathlib.lean,Mathlib/ModelTheory/FunctionalFormula.lean 2 7 ['ChrisHughes24', 'github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot'] fpvandoorn
assignee:fpvandoorn
22-31082
22 days ago
100-65270
3 months ago
100-65522
100 days
26039 tsuki8
author:tsuki8
feat(RingTheory/MvPolynomial/MonomialOrder): leadingTerm define the leadingTerm and prove some lemmas related to the def `leadingTerm`: the leading term of `f` for the monomial ordering `m` some basic lemmas about leadingTerm including: 1. `leadingTerm_eq_zero_iff` 2. `leadingTerm_image_sdiff_singleton_zero` 3. `leadingTerm_image_insert_zero` 4. `leadingTerm_zero` 5. `leadingTerm_degree_eq` 6. `leadingTerm_degree_eq'` some lemmas about the degree of `f - m.leadingTerm f`: 1. `degree_sub_leadingTerm` 2. `degree_sub_leadingTerm_lt_degree` 3. `degree_sub_leadingTerm_lt_iff` Co-authored-by: Junyu Guo @Hagb --- - [ ] depends on: #24361 - [ ] depends on: #26148 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor awaiting-author 99/1 Mathlib/RingTheory/MvPolynomial/MonomialOrder.lean 1 20 ['Hagb', 'chrisflav', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] chrisflav
assignee:chrisflav
22-23998
22 days ago
22-23998
22 days ago
12-45707
12 days
29570 eric-wieser
author:eric-wieser
fix: substitute infotrees in linters I don't know whether this is necessary in these particular cases, but I've seen places where it is. There are a handful more of these cases in Batteries. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 2/2 Mathlib/Tactic/Linter/Style.lean,Mathlib/Tactic/TacticAnalysis.lean 2 1 ['github-actions'] nobody
22-13409
22 days ago
22-13475
22 days ago
0-0
0 seconds
29576 kim-em
author:kim-em
chore: add grind annotations for homomorphisms --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
7/7 Mathlib/Algebra/Group/Hom/Defs.lean 1 1 ['github-actions'] nobody
21-79951
21 days ago
21-79965
21 days ago
0-0
0 seconds
28693 faenuccio
author:faenuccio
feat(Analysis.Normed.Module.Milman-Pettis): add Milman-Pettis theorem We add the Milman-Pettis theorem stating that an uniformly convex Banach space is reflexive. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis WIP 279/0 Mathlib/Analysis/Convex/Uniform.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Analysis/Normed/Module/Milman-Pettis.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean 4 3 ['faenuccio', 'github-actions', 'grunweg'] nobody
21-45097
21 days ago
44-49721
1 month ago
0-1
1 second
28695 chrisflav
author:chrisflav
feat(RingTheory): meta properties of bijective ring homomorphisms In particular, we show that bijective is a property local on the (algebraic) source. --- - [x] depends on: #28642 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import 170/7 Mathlib.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/RingTheory/LocalProperties/Exactness.lean,Mathlib/RingTheory/LocalRing/ResidueField/Instances.lean,Mathlib/RingTheory/Localization/Algebra.lean,Mathlib/RingTheory/Localization/Away/Basic.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/RingHom/Bijective.lean,Mathlib/RingTheory/TensorProduct/Basic.lean 11 2 ['github-actions', 'mathlib4-dependent-issues-bot'] kbuzzard
assignee:kbuzzard
21-8017
21 days ago
31-27676
1 month ago
31-30719
31 days
26920 yuma-mizuno
author:yuma-mizuno
feat(Tactic.CategoryTheory): add associator inserting tactic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory t-meta WIP 714/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Associators.lean,MathlibTest/CategoryTheory/Associators.lean 4 1 ['github-actions'] nobody
20-78313
20 days ago
86-72088
2 months ago
0-16
16 seconds
29615 eric-wieser
author:eric-wieser
chore: add a computable shortcut for `AddCommMonoid ℂ` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) bench-after-CI t-analysis easy 9/1 Mathlib/Analysis/Complex/Basic.lean 1 1 ['github-actions'] nobody
20-61219
20 days ago
20-61289
20 days ago
20-61280
20 days
24184 YaelDillies
author:YaelDillies
feat: `[G : H]` notation for the index of `H : Subgroup G` This is a cute notation which I wrote for FLT. Not sure whether we want it in mathlib nor how to include `relindex` in the picture. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra RFC
label:t-algebra$
5/0 Mathlib/GroupTheory/Index.lean 1 8 ['YaelDillies', 'erdOne', 'github-actions', 'j-loreaux', 'kbuzzard', 'mathlib4-merge-conflict-bot'] eric-wieser
assignee:eric-wieser
20-29303
20 days ago
20-29328
20 days ago
168-17044
168 days
27936 alreadydone
author:alreadydone
feat(Algebra): additivize Dvd and Prime `Prime` can't be directly additivized, so we introduce `Preprime`, which drops the `≠ 0` condition, and additivize it to `AddPrime`. To show that `Preprime` is a reasonable definition, we show its connection to `Irreducible` under `IsPrimal` and `IsRegular` conditions. We also show that an element in a product monoid is preprime iff one component is a unit and the other is preprime, and the same with `Preprime` replaced by `Irreducible`. Also additivize `IsPrimal`, `IsRelPrime` and `DecompositionMonoid`. The motivation is that the primality of `single g 1` in `AddMonoidAlgebra k G` is connected to the primality of `g` in `G`. --- I've checked [all 29 files](https://github.com/search?q=repo%3Aleanprover-community%2Fmathlib4%20%E2%88%A3%20to_additive&type=code) containing the `∣` symbol and the `to_additive` attribute and fixed the wrongly translated (`dvd` to `addDvd`) names. TODO: connect (Add)Dvd to [ExistsMul/AddOfLE](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Monoid/Unbundled/ExistsOfLE.html#ExistsMulOfLE) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
400/191 Mathlib.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/Divisibility/Basic.lean,Mathlib/Algebra/Divisibility/Finite.lean,Mathlib/Algebra/Divisibility/Hom.lean,Mathlib/Algebra/Divisibility/Prod.lean,Mathlib/Algebra/Divisibility/Units.lean,Mathlib/Algebra/Group/Action/Pointwise/Finset.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/GroupWithZero/Associated.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Algebra/Prime/Defs.lean,Mathlib/Algebra/Prime/Lemmas.lean,Mathlib/Algebra/Prime/Prod.lean,Mathlib/Data/Nat/Prime/Defs.lean,Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/GroupTheory/Coset/Card.lean,Mathlib/GroupTheory/Exponent.lean,Mathlib/GroupTheory/GroupAction/Blocks.lean,Mathlib/GroupTheory/GroupAction/Period.lean,Mathlib/GroupTheory/Index.lean,Mathlib/GroupTheory/OrderOfElement.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean,Mathlib/GroupTheory/Schreier.lean,Mathlib/GroupTheory/SpecificGroups/Cyclic.lean,Mathlib/Tactic/ToAdditive/GuessName.lean 30 11 ['JovanGerb', 'adomani', 'alreadydone', 'bryangingechen', 'github-actions', 'mathlib4-merge-conflict-bot'] bryangingechen
assignee:bryangingechen
20-21570
20 days ago
20-28717
20 days ago
58-78001
58 days
27252 Parcly-Taxel
author:Parcly-Taxel
feat: sharp bounds for `‖exp (I * x) - 1‖` when `x` is real From Carleson carleson t-analysis 44/0 Mathlib/Analysis/Complex/Trigonometric.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Bounds.lean 2 13 ['Parcly-Taxel', 'eric-wieser', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] hrmacbeth
assignee:hrmacbeth
20-7992
20 days ago
27-60417
27 days ago
28-66875
28 days
29055 vihdzp
author:vihdzp
feat: `Ordinal.toENat` We essentially copy the Cardinal/ENat file but make it for ordinals instead. See [Zulip](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2317758.20Ordinal.2EtoENat/near/479768508) for some prior discussion on this PR (particularly, the duplication and how there's no easy way to resolve it.) --- Moved from #17758. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 292/0 Mathlib.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/SetTheory/Cardinal/ENat.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/ENat.lean 6 1 ['github-actions'] alreadydone
assignee:alreadydone
20-7990
20 days ago
36-60622
1 month ago
36-60641
36 days
22039 YaelDillies
author:YaelDillies
feat: simproc for computing `Finset.Ixx` of natural numbers --- - [x] depends on: #22290 - [x] depends on: #22559 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-meta 315/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Simproc/FinsetInterval.lean,Mathlib/Util/Qq.lean 4 64 ['FLDutchmann', 'Paul-Lez', 'YaelDillies', 'eric-wieser', 'github-actions', 'grunweg', 'kckennylau', 'kim-em', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'urkud'] eric-wieser
assignee:eric-wieser
19-62877
19 days ago
170-61109
5 months ago
226-21821
226 days
26777 unknown
author:unknown
chore(Data/Set/Image): move `BooleanAlgebra` material to `Order` unknown description large-import t-data WIP -1/-1 -1 n/a [] nobody
19-45918
19 days ago
unknown
unknown
27107 AntoineChambert-Loir
author:AntoineChambert-Loir
feat(GroupTheory/GroupAction/SubMulAction/Combination) : combinations and group actions `Nat.Combination X n` is the type all `s : Finset X` such that `s.card = n`. This PR provides some API for this subtype and the `SubMulAction` it inherits when a group acts on `X`. It will be used in conjunction with the description of some maximal subgroups of `Equiv.Perm X` to construct primitive actions. Question on the names: when `X` is a fintype, there is `Finset.powersetCard` that gives the same object, as a `Finset`. But the present PR also applies when `X` is infinite. Then maybe `Nat.Combination` should be renamed as `Set.powersetCard`? --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory 325/0 Mathlib.lean,Mathlib/Data/Fintype/EquivFin.lean,Mathlib/Data/Nat/Choose/Basic.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/Combination.lean 4 39 ['AntoineChambert-Loir', 'alreadydone', 'github-actions', 'tb65536'] alreadydone
assignee:alreadydone
19-22517
19 days ago
59-62839
1 month ago
82-6181
82 days
26544 vihdzp
author:vihdzp
feat(SetTheory/ZFC/Ordinal): Lean ordinals to ZFC ordinals We define `Ordinal.toZFSet` and prove that its outputs are precisely the ZFC ordinals. Moved from #19985. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-set-theory 166/5 Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Ordinal.lean,Mathlib/SetTheory/ZFC/PSet.lean,Mathlib/SetTheory/ZFC/Rank.lean 4 23 ['alreadydone', 'github-actions', 'leanprover-community-bot-assistant', 'staroperator', 'vihdzp'] b-mehta
assignee:b-mehta
19-7985
19 days ago
26-62943
26 days ago
53-40301
53 days
29638 yuma-mizuno
author:yuma-mizuno
feat(CategoryTheory): define descent data by presieves --- Addendum: I realized that there is prior work in #24434. Since this PR uses a slightly different definition, I plan to make this PR a follow-up to #24434. Until then, I’ll keep it marked as WIP. See the comment: https://github.com/leanprover-community/mathlib4/pull/29638#issuecomment-3290041719 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory WIP 408/2 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Functor/Pseudofunctor.lean,Mathlib/CategoryTheory/Bicategory/LocallyDiscrete.lean,Mathlib/CategoryTheory/Category/Cat.lean,Mathlib/CategoryTheory/Stack/Basic.lean,Mathlib/CategoryTheory/Stack/Descent.lean 6 4 ['chrisflav', 'github-actions', 'yuma-mizuno'] nobody
18-78154
18 days ago
19-53677
19 days ago
0-74
1 minute
29634 YaelDillies
author:YaelDillies
feat: missing instance `NonUnitalCommSemiring R → NonUnitalNonAssocCommSemiring R` For some reason, this causes elaboration issues. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-CI help-wanted
label:t-algebra$
16/7 Mathlib/Algebra/Ring/Defs.lean,Mathlib/RingTheory/Coalgebra/Basic.lean,Mathlib/RingTheory/Coalgebra/Hom.lean,Mathlib/Tactic/Ring/Basic.lean 4 3 ['YaelDillies', 'alreadydone', 'github-actions'] nobody
18-68843
18 days ago
19-62998
19 days ago
0-19
19 seconds
22043 YaelDillies
author:YaelDillies
chore: shortcut instance for `Neg ℤˣ` This lets us avoid importing `Ring` in downstream files (most of the effect is to come). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-algebra
label:t-algebra$
20/47 Mathlib.lean,Mathlib/Algebra/GCDMonoid/Nat.lean,Mathlib/Algebra/Group/Int/Units.lean,Mathlib/Algebra/Order/Ring/Abs.lean,Mathlib/Algebra/Ring/Int/Units.lean,Mathlib/Algebra/Ring/NegOnePow.lean,Mathlib/Data/Fintype/Units.lean,Mathlib/Data/Int/AbsoluteValue.lean,Mathlib/Data/Int/Associated.lean,Mathlib/GroupTheory/HNNExtension.lean,Mathlib/NumberTheory/NumberField/Basic.lean,MathlibTest/Zify.lean 12 17 ['YaelDillies', 'erdOne', 'eric-wieser', 'github-actions', 'j-loreaux', 'leanprover-community-bot-assistant', 'mathlib-bors'] eric-wieser
assignee:eric-wieser
18-66798
18 days ago
142-49835
4 months ago
227-22861
227 days
29668 harahu
author:harahu
doc: cleanup of kleene star docs This PR: - Corrects "Kleene's star" to "Kleene star" - Clarifies a comment about notation. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability 5/5 Mathlib/Computability/Language.lean 1 1 ['github-actions'] nobody
18-62811
18 days ago
18-62819
18 days ago
18-62853
18 days
28533 kim-em
author:kim-em
feat(linarith): add `linarith?` mode which suggests a `linarith only` call Adds `linarith?`, which traces the internal to watch which inequalities are being used, and suggests a `linarith only` call via the "try this:" mechanism. Also adds a `+minimize` flag, on by default, which then greedily tries to drop hypotheses from the used set, to see if the problem is still possible with a smaller set. Currently I don't have test case showing this is worthwhile, however. Contributions welcome. ------ https://chatgpt.com/codex/tasks/task_e_68a02bce93a883218485c7e7cafb877a codex t-meta 212/68 Mathlib/Tactic/Linarith/Frontend.lean,Mathlib/Tactic/Linarith/Verification.lean,MathlibTest/linarith.lean 3 12 ['YaelDillies', 'eric-wieser', 'github-actions', 'hrmacbeth', 'jcommelin', 'kim-em', 'mathlib4-merge-conflict-bot'] robertylewis
assignee:robertylewis
18-51125
18 days ago
32-516
1 month ago
47-86276
47 days
25183 YaelDillies
author:YaelDillies
feat: convolution product on linear maps from a coalgebra to an algebra Construct the ring structure on linear maps `C → A` where `C` is a coalgebra and `A` an algebra, where multiplication is given by `(f * g)(x) = ∑ f x₍₁₎ * g x₍₂₎` in Sweedler notation or ``` | μ | | / \ f * g = f g | | \ / δ | ``` diagrammatically, where `μ` stands for multiplication and `δ` for comultiplication. [Zulip](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/.60Mul.60.20instance.20on.20algebra.20homomorphisms.20from.20monoid.20algebra) From Toric Co-authored-by: Michał Mrugała Co-authored-by: Yunzhou Xie --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) toric t-algebra
label:t-algebra$
263/10 Mathlib.lean,Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/RingTheory/Coalgebra/Basic.lean,Mathlib/RingTheory/Coalgebra/Convolution.lean,Mathlib/RingTheory/Regular/RegularSequence.lean 7 86 ['YaelDillies', 'erdOne', 'eric-wieser', 'github-actions', 'kbuzzard', 'smorel394', 'themathqueen'] kbuzzard
assignee:kbuzzard
18-47471
18 days ago
36-63143
1 month ago
131-29192
131 days
26580 vasnesterov
author:vasnesterov
feat(Tactic/Order): translate linear orders to `Int` It was [pointed out](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/tactic.20for.20partial.20orders/near/515897754) that `order` is not complete for linear orders with lattice operations (while it remains complete for linear orders without lattice operations and for general lattices without assuming linearity). The problem for linear orders with lattice operations is NP-hard, but it can be translated from an arbitrary type to `Int` and then solved using a smart and efficient procedure (such as `omega`). This PR implements such a translation within the `order` tactic. Co-authored-by: Aaron Liu --- - [x] depends on: #26354 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 300/29 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Order.lean,Mathlib/Tactic/Order/Graph/Basic.lean,Mathlib/Tactic/Order/Preprocessing.lean,Mathlib/Tactic/Order/ToInt.lean,MathlibTest/order.lean 7 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vasnesterov'] alexjbest
assignee:alexjbest
18-41786
18 days ago
18-41794
18 days ago
82-56098
82 days
26110 YaelDillies
author:YaelDillies
feat: sharp monoids Define sharp monoids, which are the monoids whose only unit is `1`. This concept is useful in log geometry and in particular shows up in the theory of affine monoids. This concept already existed in the guise of `Subsingleton Mˣ`, but giving it a name makes it easier to refer to and uncovers some missing instances. From Toric --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) toric t-algebra
label:t-algebra$
51/30 Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Irreducible/Defs.lean,Mathlib/Algebra/Group/Pi/Units.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/Submonoid/Units.lean,Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Associated.lean,Mathlib/Algebra/GroupWithZero/Divisibility.lean,Mathlib/Data/List/Prime.lean,Mathlib/Data/ZMod/Basic.lean,Mathlib/NumberTheory/DirichletCharacter/Basic.lean,Mathlib/RingTheory/ChainOfDivisors.lean,Mathlib/RingTheory/IntegralDomain.lean,Mathlib/RingTheory/UniqueFactorizationDomain/NormalizedFactors.lean,Mathlib/RingTheory/Valuation/Integers.lean 18 7 ['YaelDillies', 'b-mehta', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot', 'vihdzp'] adomani
assignee:adomani
18-40936
18 days ago
22-35367
22 days ago
106-35411
106 days
29422 jsm28
author:jsm28
fix(Data/Finset/Max): Use `DecidableEq` for `insert` lemmas These `insert` in these lemma statements uses a `DecidableEq` instance derived from `LinearOrder`; make them syntactically more general by passing in a `DecidableEq` instance separately. (Some `insert` lemmas in this file already take `DecidableEq` hypotheses.) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 8/8 Mathlib/Data/Finset/Max.lean 1 2 ['eric-wieser', 'github-actions'] nobody
18-36676
18 days ago
26-5954
26 days ago
26-5933
26 days
29675 yury-harmonic
author:yury-harmonic
feat(Wolstenholme): new file Co-authored-by: @Aristotle-Harmonic --- I still need to cleanup the proof and write the docs. For now, it's just what the AI generated, forward-ported to the latest Mathlib. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-author help-wanted 198/0 Mathlib.lean,Mathlib/Data/Nat/Choose/Wolstenholme.lean 2 3 ['github-actions', 'yury-harmonic'] nobody
18-31442
18 days ago
18-31442
18 days ago
0-125
2 minutes
29690 jt496
author:jt496
chore(SimpleGraph/Subgraph): remove duplicate def and fix names We previously had `Subgraph.topEquiv` and `Subgraph.topIso` for the graph isomorphism `(⊤ : G.Subgraph).coe ≃g G`. `Subgraph.topIso` seems preferable as a name for this so this PR deprecates the other name. Also rename and deprecate `Subgraph.botEquiv` to `Subgraph.botIso`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 5/6 Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 1 1 ['github-actions'] nobody
18-22266
18 days ago
18-22281
18 days ago
18-22319
18 days
28884 kim-em
author:kim-em
chore: deprecate ShiftLeft Int instance This PR proposes deprecating the `ShiftLeft Int` instance (which allows bit-shifting an integer by an integer), and similarly for `ShiftRight`. These are unused in Mathlib. I'm happy if someone wants to keep this, but I would ask that they: * fix the doc-strings to explain what happens for negative shifts * ~~restores the theorem `Int.shiftLeft_add` which I've commented out on `nightly-testing` (and then revert b33c9d7aaea on `nightly-testing`).~~ * ideally but optionally, complete the API, e.g. reducing shifts by casts back to shifts by a Nat t-data 22/3 Mathlib/Data/Int/Bitwise.lean 1 5 ['eric-wieser', 'github-actions', 'kim-em', 'mathlib4-merge-conflict-bot'] nobody
18-7995
18 days ago
18-8013
18 days ago
39-62513
39 days
28973 YaelDillies
author:YaelDillies
feat(TensorProduct): `lTensor` as an `AlgHom` and other lemmas From Toric Co-authored-by: Michał Mrugała --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory toric 21/0 Mathlib/RingTheory/TensorProduct/Basic.lean 1 7 ['YaelDillies', 'eric-wieser', 'github-actions', 'themathqueen'] mattrobball
assignee:mattrobball
17-75773
17 days ago
18-8971
18 days ago
20-32669
20 days
28487 euprunin
author:euprunin
chore(RingTheory): golf entire `smul_eq_zero_of_mem`, `hasEval`, `eq_of_prod_eq_prod` and `isIntegral_of_mem_ringOfIntegers` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author 7/16 Mathlib/RingTheory/Extension/Basic.lean,Mathlib/RingTheory/PowerSeries/Substitution.lean,Mathlib/RingTheory/UniqueFactorizationDomain/FactorSet.lean,Mathlib/RingTheory/Valuation/AlgebraInstances.lean 4 2 ['erdOne', 'github-actions'] erdOne
assignee:erdOne
17-62955
17 days ago
17-62955
17 days ago
31-62497
31 days
28772 chrisflav
author:chrisflav
feat(RingTheory/IsTensorProduct): add `IsPushout.cancelBaseChange` This is a cancel-on-the-left version of `AlgebraTensorModule.cancelBaseChange`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author 49/0 Mathlib/RingTheory/IsTensorProduct.lean 1 2 ['erdOne', 'github-actions'] erdOne
assignee:erdOne
17-62945
17 days ago
17-62945
17 days ago
25-4293
25 days
29706 kim-em
author:kim-em
feat: add piCongrSigmaFiber and piCongrFiberwise equivalences ## Summary Add two new equivalence functions for working with fibers and sigma types: - `Equiv.piCongrSigmaFiber`: transforms between functions on sigma fibers and regular pi types - `Equiv.piCongrFiberwise`: lifts fiber-wise equivalences to product equivalences These functions are from the FLT (Fermat's Last Theorem) project and are useful for manipulating dependent function types indexed by fibers of a function. ## Details The new definitions allow for elegant transformations between: 1. Functions defined on sigma types representing fibers of a function 2. Regular dependent functions These are particularly useful in algebraic contexts where one needs to work with products indexed by fibers. ## Context This PR was prepared by Claude (Claude Code) based on the following prompt: > "Please read FLT/Mathlib/Logic/Equiv/Basic.lean, and also the corresponding file in the Mathlib repository. Please prepare a PR to Mathlib containing this content, putting it at an appropriate point in the corresponding Mathlib file. Make sure the PR is label FLT, and write in the PR comment an explanation that the PR was prepared by Claude, including quoting the prompting." The content is sourced from `/Users/kim/projects/lean/FLT/FLT/Mathlib/Logic/Equiv/Basic.lean` in the FLT project repository. 🤖 Generated with [Claude Code](https://claude.ai/code) FLT t-logic 39/0 Mathlib/Logic/Equiv/Basic.lean 1 5 ['Ruben-VandeVelde', 'github-actions', 'kim-em'] nobody
17-49256
17 days ago
17-49734
17 days ago
17-65943
17 days
29720 javra
author:javra
feat(CategoryTheory): `TransportEnrichment` and `ForgetEnrichment` as 2-functors --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory WIP 63/1 Mathlib/CategoryTheory/Enriched/Basic.lean,Mathlib/CategoryTheory/Enriched/EnrichedCat.lean 2 1 ['github-actions'] nobody
17-47729
17 days ago
17-47743
17 days ago
0-24
24 seconds
26357 javra
author:javra
feat(CategoryTheory): linear categories as `ModuleCat R`-enriched categories Continues #23826. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory awaiting-author 197/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/CategoryTheory/Enriched/Linear.lean,Mathlib/CategoryTheory/Linear/Basic.lean,Mathlib/CategoryTheory/Monoidal/Linear.lean 5 9 ['adamtopaz', 'github-actions', 'javra'] adamtopaz
assignee:adamtopaz
17-28819
17 days ago
17-28819
17 days ago
78-31643
78 days
29010 grunweg
author:grunweg
chore: more tests for field_simp features and edge cases --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 135/0 MathlibTest/FieldSimp.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
17-25757
17 days ago
36-75094
1 month ago
37-58622
37 days
28100 themathqueen
author:themathqueen
feat(LinearAlgebra/Matrix): algebra automorphisms on matrices are inner Characterization of automorphisms on matrices: for any algebra automorphism `f : Matrix n n R ≃ₐ[R] Matrix n n R`, there exists an invertible matrix `T` such that `f a = T * a * T⁻¹` for all `a`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
74/0 Mathlib/LinearAlgebra/Matrix/GeneralLinearGroup/Basic.lean 1 33 ['Whysoserioushah', 'eric-wieser', 'github-actions', 'hrmacbeth', 'mathlib4-merge-conflict-bot', 'themathqueen'] Vierkantor
assignee:Vierkantor
17-22660
17 days ago
21-35552
21 days ago
34-16869
34 days
26735 Raph-DG
author:Raph-DG
feat(AlgebraicGeometry): The codimension of a point of a scheme is equal to the krull dimension of the stalk In this PR we show that the codimension of a point in a scheme is equal to the krull dimension of the local ring at that point, as in stacks 02IZ. --- The proof of the main result `stalk_dim_eq_coheight` is currently a bit long for my (and I suspect the broader community's) tastes. That said, I'm not quite sure the best way to break it into pieces, any comments would be very much appreciated! - [ ] depends on: #26204 [For the notion of codimension, here we are using the coheight in the specialization order. ] - [ ] depends on: #26225 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry 204/1 Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Topology/KrullDimension.lean 3 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] erdOne
assignee:erdOne
17-8010
17 days ago
24-70680
24 days ago
24-71451
24 days
29132 YaelDillies
author:YaelDillies
feat(AdjoinRoot): bundle operations as `AlgHom`s In particular, generalise and rename `liftHom` to use a general `eval₂` instead of `aeval`. From Toric Co-authored-by: Andrew Yang the.erd.one@gmail.com Co-authored-by: Michał Mrugała kiolterino@gmail.com --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory toric 164/103 Mathlib/Algebra/Algebra/Hom.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Basic.lean,Mathlib/FieldTheory/Isaacs.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/FieldTheory/Minpoly/IsIntegrallyClosed.lean,Mathlib/RingTheory/Adjoin/Field.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/LocalRing/ResidueField/Instances.lean,Mathlib/RingTheory/Localization/Away/AdjoinRoot.lean 9 3 ['erdOne', 'github-actions', 'mathlib4-merge-conflict-bot'] erdOne
assignee:erdOne
17-8008
17 days ago
31-45320
1 month ago
33-55779
33 days
27292 gasparattila
author:gasparattila
feat: asymptotic cone of a set This PR defines the asymptotic cone of a set in a normed affine space and proves its main properties. This is partial progress towards showing that an unbounded finite-dimensional convex set contains a ray. --- - [x] depends on: #27221 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge new-contributor t-analysis 466/0 Mathlib.lean,Mathlib/Analysis/Normed/Affine/AsymptoticCone.lean,Mathlib/Order/Filter/Map.lean,Mathlib/Topology/Algebra/AsymptoticCone.lean 4 45 ['AntoineChambert-Loir', 'YaelDillies', 'gasparattila', 'github-actions', 'mathlib4-dependent-issues-bot'] YaelDillies
assignee:YaelDillies
16-75947
16 days ago
59-37840
1 month ago
73-55374
73 days
27937 madvorak
author:madvorak
feat(Logic/Basic): `congr_heq₂` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic awaiting-author 6/0 Mathlib/Logic/Basic.lean 1 8 ['YaelDillies', 'fpvandoorn', 'github-actions', 'madvorak', 'vihdzp'] fpvandoorn
assignee:fpvandoorn
16-62490
16 days ago
42-63275
1 month ago
17-70200
17 days
29432 lecopivo
author:lecopivo
feat: `data_synth` tactic to prove `HasFDerivAt 𝕜 f ?f' x` and similar New tactic `data_synth` that can prove proposition with holes e.g. figure out what `?f'` is and prove `HasFDerivAt 𝕜 f ?f' x` --- Tactic `data_synth` is designed to synthesize some data that satisfies some proposition. The canonical example is `HasFDerivAt 𝕜 f ?f' x`, this tactic will figure out `f'` and provide proof of `HasFDerivAt 𝕜 f f' x`. Another examples: `HasBoundinbBall s ?center ?radius` or `IsPolynomial f ?p` ``` def HasBoundingBall (s : Set α) (center : α) (radius : ℝ) : Prop := s ⊆ Metric.closedBall center radius def IsPolynomial (f : R → R) (p : Polynomial R) := f = p.eval ``` t-meta WIP 1943/0 Mathlib/Tactic/DataSynth.lean,Mathlib/Tactic/DataSynth/Attr.lean,Mathlib/Tactic/DataSynth/Core.lean,Mathlib/Tactic/DataSynth/Decl.lean,Mathlib/Tactic/DataSynth/Elab.lean,Mathlib/Tactic/DataSynth/FDeriv.lean,Mathlib/Tactic/DataSynth/FDeriv/Basic.lean,Mathlib/Tactic/DataSynth/FDeriv/Dispatch.lean,Mathlib/Tactic/DataSynth/FDeriv/Init.lean,Mathlib/Tactic/DataSynth/FDeriv/Simproc.lean,Mathlib/Tactic/DataSynth/Tests/BoundingBall.lean,Mathlib/Tactic/DataSynth/Tests/Compilation.lean,Mathlib/Tactic/DataSynth/Tests/FDeriv.lean,Mathlib/Tactic/DataSynth/Tests/FDerivInit.lean,Mathlib/Tactic/DataSynth/Tests/FwdDeriv.lean,Mathlib/Tactic/DataSynth/Tests/Normalize.lean,Mathlib/Tactic/DataSynth/Tests/Polynomial.lean,Mathlib/Tactic/DataSynth/Theorems.lean,Mathlib/Tactic/DataSynth/ToBatteries.lean,Mathlib/Tactic/DataSynth/Types.lean 20 3 ['JovanGerb', 'github-actions', 'lecopivo'] nobody
16-60610
16 days ago
25-54318
25 days ago
0-11559
3 hours
29437 NotWearingPants
author:NotWearingPants
feat(Data/Seq): add Seq.subsequence and prove basic theorems about it I added `Seq.subsequence` to compose a sequence with a monotone function, creating a subsequence. Aliased to `Seq.comp` since it's a composition. I also added `Nat.le_induction_step_iff` which is needed to prove a subsequence is a sequence. This proves the comment at the top of `Defs.lean` that says "if `f n = none`, then `f m = none` for all `m ≥ n`" while `IsSeq` only talks about `n+1`. For completion I added the same statement for `Int`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-data new-contributor 114/0 Mathlib/Data/Int/Init.lean,Mathlib/Data/Nat/Init.lean,Mathlib/Data/Seq/Basic.lean,Mathlib/Data/Seq/Defs.lean 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
16-55191
16 days ago
16-55212
16 days ago
25-42703
25 days
24794 chrisflav
author:chrisflav
feat(RingTheory/Presentation): core of a presentation If `P` is a presentation of `S` as an `R`-algebra and `R₀` a subring of `R` containing the coefficients of the relations of `P`, then there exists an `R₀`-algebra `S₀` such that `S` is isomorphic to the base change of `S₀` to `R`. This is a tool to remove Noetherian hypothesis in certain situations. --- - [x] depends on: #24788 - [x] depends on: #24786 - [x] depends on: #24785 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 256/6 Mathlib.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Tower.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/RingTheory/AlgebraicIndependent/Transcendental.lean,Mathlib/RingTheory/Extension/Presentation/Core.lean,Mathlib/RingTheory/FiniteType.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/RingTheory/LinearDisjoint.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean 10 17 ['chrisflav', 'erdOne', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] Vierkantor
assignee:Vierkantor
16-43559
16 days ago
20-26096
20 days ago
116-10331
116 days
28699 chrisflav
author:chrisflav
feat(RingTheory/Cotangent): cotangent of composition with localization away from an element Let `R → S → T` be algebras such that `T` is the localization of `S` away from one element, where `S` is generated over `R` by `P : R[X] → S` with kernel `I` and `Q : S[Y] → T` is the canonical `S`-presentation of `T` with kernel `K`. Denote by `J` the kernel of the composition `R[X,Y] → T`. We deduce `J/J² ≃ₗ[T] T ⊗[S] (I/I²) × K/K²` from the Jacobi Zariski sequence. From Pi1. --- - [x] depends on: #28697 The import increase is expected: This file was PRed in two steps and only the second one depends on more imports. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import 157/4 Mathlib/RingTheory/Extension/Cotangent/LocalizationAway.lean,Mathlib/RingTheory/Extension/Generators.lean,Mathlib/RingTheory/Extension/Presentation/Basic.lean,Mathlib/RingTheory/Smooth/StandardSmoothCotangent.lean 4 4 ['chrisflav', 'erdOne', 'github-actions', 'mathlib4-dependent-issues-bot'] erdOne
assignee:erdOne
16-42731
16 days ago
43-49813
1 month ago
43-51223
43 days
28375 euprunin
author:euprunin
chore(Analysis/SpecialFunctions/Pow): golf entire `rpow_lt_rpow_of_exponent_neg`, `rpow_le_rpow_of_exponent_nonpos`, `rpow_le_of_le_log` and `rpow_lt_of_lt_log` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 8/22 Mathlib/Analysis/SpecialFunctions/Pow/Real.lean 1 3 ['JonBannon', 'Ruben-VandeVelde', 'github-actions', 'grunweg'] urkud
assignee:urkud
16-36382
16 days ago
16-36382
16 days ago
34-46582
34 days
28987 euprunin
author:euprunin
chore(Analysis/Distribution): remove redundant `have` in `ae_eq_zero_of_integral_smooth_smul_eq_zero` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 0/2 Mathlib/Analysis/Distribution/AEEqOfIntegralContDiff.lean 1 7 ['euprunin', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] hrmacbeth
assignee:hrmacbeth
16-36149
16 days ago
16-36149
16 days ago
14-71261
14 days
26129 LessnessRandomness
author:LessnessRandomness
feat(Geometry/Euclidean/Angle/Unoriented): triangle inequality for angles This PR continues the work from #24206. Original PR: https://github.com/leanprover-community/mathlib4/pull/24206 new-contributor t-euclidean-geometry 203/16 Mathlib.lean,Mathlib/Analysis/Fourier/FiniteAbelian/Orthogonality.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Affine.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Basic.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/TriangleInequality.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean 8 76 ['JovanGerb', 'LessnessRandomness', 'Timeroot', 'github-actions', 'jsm28', 'mathlib4-merge-conflict-bot', 'themathqueen'] jsm28
assignee:jsm28
16-36028
16 days ago
29-12745
29 days ago
104-40538
104 days
29324 tb65536
author:tb65536
refactor(Analysis/Calculus/IteratedDeriv/Defs): tweak statement of `iteratedDerivWithin_one` This PR removes the `x` from `iteratedDerivWithin_one` to make it match `iteratedDerivWithin_zero`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 3/2 Mathlib/Analysis/Calculus/IteratedDeriv/Defs.lean 1 3 ['Ruben-VandeVelde', 'github-actions', 'grunweg'] grunweg
assignee:grunweg
16-32181
16 days ago
30-28123
1 month ago
30-28102
30 days
29756 Ruben-VandeVelde
author:Ruben-VandeVelde
feat: Finsupp.comapDomain_surjective --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) FLT t-data 9/0 Mathlib/Data/Finsupp/Basic.lean 1 1 ['github-actions'] nobody
16-25919
16 days ago
16-25957
16 days ago
16-25994
16 days
25012 urkud
author:urkud
refactor(*): migrate from `Matrix.toLin'` to `Matrix.mulVecLin` or `Matrix.mulVec` whenever we don't need the `LinearEquiv.symm` part. See [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Matrix.2EtoLin'.20vs.20Matrix.2EmulVecLin/with/515188548). It makes sense to have only one normal form, and `Matrix.toLin'` has an extra `DecidableEq` assumption. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 165/126 Mathlib/Algebra/Lie/Matrix.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/Matrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/LinearAlgebra/Basis/Defs.lean,Mathlib/LinearAlgebra/Determinant.lean,Mathlib/LinearAlgebra/Finsupp/VectorSpace.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Minpoly.lean,Mathlib/LinearAlgebra/Matrix/Diagonal.lean,Mathlib/LinearAlgebra/Matrix/Gershgorin.lean,Mathlib/LinearAlgebra/Matrix/Rank.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/Matrix/SpecialLinearGroup.lean,Mathlib/LinearAlgebra/Matrix/ToLin.lean,Mathlib/LinearAlgebra/Matrix/ToLinearEquiv.lean,Mathlib/LinearAlgebra/UnitaryGroup.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean 19 3 ['github-actions', 'leanprover-community-bot-assistant'] nobody
16-4241
16 days ago
16-4262
16 days ago
31-79217
31 days
27702 FLDutchmann
author:FLDutchmann
feat(NumberTheory/SelbergSieve): define Lambda-squared sieves and prove important properties This PR continues the work from #22052. Original PR: https://github.com/leanprover-community/mathlib4/pull/22052 - [ ] depends on: #27820 t-number-theory awaiting-author 199/0 Mathlib/NumberTheory/SelbergSieve.lean 1 33 ['FLDutchmann', 'MichaelStollBayreuth', 'bryangingechen', 'github-actions', 'jcommelin', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
15-62861
15 days ago
15-62861
15 days ago
8-1328
8 days
26961 mariainesdff
author:mariainesdff
feat(RingTheory/PowerSeries/Substitution): add API Co-authored-by: @AntoineChambert-Loir --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 57/5 Mathlib/RingTheory/PowerSeries/Basic.lean,Mathlib/RingTheory/PowerSeries/Substitution.lean 2 13 ['Ruben-VandeVelde', 'github-actions', 'mariainesdff', 'mattrobball'] mattrobball
assignee:mattrobball
15-56875
15 days ago
15-56875
15 days ago
62-76898
62 days
25831 ScottCarnahan
author:ScottCarnahan
feat (RingTheory/HahnSeries): Powers of a binomial This PR introduces powers of a binomial `single g 1 - single g' 1` in a Hahn series, where the powers take values in a binomial ring. These series behave as one would expect with respect to addition of powers, and comparison with natural number powers. They are often used in the theory of vertex algebras. --- - [x] depends on: #25830 - [x] depends on: #27497 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24102.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24102* t-ring-theory 132/0 Mathlib.lean,Mathlib/RingTheory/HahnSeries/Addition.lean,Mathlib/RingTheory/HahnSeries/Binomial.lean,Mathlib/RingTheory/HahnSeries/HEval.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean 5 13 ['ScottCarnahan', 'github-actions', 'kbuzzard', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] kbuzzard
assignee:kbuzzard
15-30063
15 days ago
50-17454
1 month ago
50-18910
50 days
29761 bwangpj
author:bwangpj
feat: Chinese Remainder Theorem for `ZMod n` Define `ZMod.equivPi`, the Chinese Remainder Theorem for `ZMod n`, decomposing it as a product of `ZMod` over its prime power factors. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 22/0 Mathlib/Data/Nat/Factorization/Basic.lean,Mathlib/Data/ZMod/QuotientRing.lean 2 8 ['Ruben-VandeVelde', 'bwangpj', 'github-actions', 'j-loreaux'] nobody
15-16664
15 days ago
15-16664
15 days ago
15-68049
15 days
26827 pechersky
author:pechersky
feat(Analysis/Normed/ValuativeRel): helper instance for NormedField --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #26713 - [x] depends on: #26826 t-algebra t-analysis t-number-theory
label:t-algebra$
205/20 Mathlib.lean,Mathlib/Analysis/Normed/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 3 19 ['ADedecker', 'adamtopaz', 'github-actions', 'kbuzzard', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] kbuzzard
assignee:kbuzzard
15-12254
15 days ago
51-40894
1 month ago
88-20212
88 days
26096 vasnesterov
author:vasnesterov
feat(Topology/Instances): Cantor set is the set of ternary numbers without `1`s * Prove `ofDigits_zero_two_sequence_mem_cantorSet`: If `x = 0.d₀d₁...` in base-3, and none of the digits `dᵢ` is `1`, then `x` belongs to the Cantor set. * Prove `ofDigits_zero_two_sequence_unique`: such a representation is uniquie. * Define `toTernary` which converts a real number from the Cantor set to its ternary representation without `1`s. * Prove `ofDigits_cantorToTernary : ofDigits (cantorToTernary x) = x`. --- This is a prerequisite for #26136. - [x] depends on: #26001 - [x] depends on: #26021 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-topology 231/0 Mathlib/Topology/Instances/CantorSet.lean,scripts/noshake.json 2 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] jcommelin
assignee:jcommelin
15-7999
15 days ago
22-20538
22 days ago
22-20896
22 days
29530 ShreckYe
author:ShreckYe
feat(Dynamics/PeriodicPts): some theorems for `Pi.map` in `Dynamics/PeriodicPts` analogous to those for `Prod.map` Split from #29204. Some namespace prefixes are added in `GroupTheory/OrderOfElement.lean` to distinguish the extra imports introduced. - [ ] depends on: #29528 large-import 77/8 Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/Dynamics/PeriodicPts/Lemmas.lean,Mathlib/GroupTheory/OrderOfElement.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] dupuisf
assignee:dupuisf
15-7993
15 days ago
22-33826
22 days ago
22-34480
22 days
29569 chrisflav
author:chrisflav
chore(RingTheory/LocalProperties): add algebra versions of exactness lemmas The module variants are less convenient to apply directly in the case of algebras. From Pi1. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 67/0 Mathlib/RingTheory/LocalProperties/Exactness.lean 1 1 ['github-actions'] mattrobball
assignee:mattrobball
15-7988
15 days ago
22-14307
22 days ago
22-14427
22 days
29352 fpvandoorn
author:fpvandoorn
refactor: simplify dictionary in fixAbbreviation * Improve capitalization algorithm: you now don't have to give entries twice in `fixAbbreviation` (now `abbreviationDict`). * The new algorithm uses the fact that we can easily find the `lowerCamelCase` name from the `UpperCamelCase` name, namely by applying `String.decapitalizeSeq`. This means that both `nameDict` and `abbreviationDict` have as input `lowerCamelCase` and as output `UpperCamelCase`. * This removes the need to especially fix `NSMul`/`ZSMul` and similar. * `abbreviationDict` still needs two entries if both `snake_case` and either `camelCase` need to be translated. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author 149/162 Mathlib/Tactic/ToAdditive/GuessName.lean,MathlibTest/toAdditive.lean 2 21 ['JovanGerb', 'fpvandoorn', 'github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] bryangingechen
assignee:bryangingechen
15-6738
15 days ago
15-6738
15 days ago
11-83619
11 days
27306 xyzw12345
author:xyzw12345
feat: `lie_ring` tactic and `LieReduce` command This PR continues the work from #22196. Original PR: https://github.com/leanprover-community/mathlib4/pull/22196 t-meta 810/2 Mathlib.lean,Mathlib/Algebra/Lie/Derivation/AdjointAction.lean,Mathlib/Tactic.lean,Mathlib/Tactic/LieAlgebra/Basic.lean,Mathlib/Tactic/LieAlgebra/LieRingNF.lean,Mathlib/Util/AtomM.lean,MathlibTest/lie_ring.lean,scripts/noshake.json 8 12 ['JovanGerb', 'github-actions', 'xyzw12345'] JovanGerb
assignee:JovanGerb
14-80407
14 days ago
24-84996
24 days ago
72-52075
72 days
25899 pfaffelh
author:pfaffelh
feat(Topology/Compactness/CompactSystem): introduce compact Systems A compact system is a set systems with the property that, whenever a countable intersections of sets in the set system is empty, there is a finite subset of sets with empty intersection. These are needed e.g. in measure theory if one wants to show sigma-additivity of a set function on a ring. * Main result: The set of sets which are either compact and closed, or `univ`, is a compact system. * Introduce `Dissipate s x := ⋂ y ≤ x, s y` (Data/Set/Dissipate), which is parallel to Data/Set/Accumulate. Co-authored-by: Rémy Degenne remydegenne@gmail.com --- *This PR continues the work from #24541.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24541* t-topology awaiting-author 453/1 Mathlib.lean,Mathlib/Data/Set/Accumulate.lean,Mathlib/Data/Set/Dissipate.lean,Mathlib/MeasureTheory/PiSystem.lean,Mathlib/Topology/Compactness/CompactSystem.lean 5 26 ['github-actions', 'pfaffelh', 'sgouezel'] PatrickMassot
assignee:PatrickMassot
14-56411
14 days ago
14-56411
14 days ago
70-65301
70 days
25902 pfaffelh
author:pfaffelh
feat: The finite product of semi-rings (in terms of measure theory) is a semi-ring. ~~Move results for rings (in terms of measure theory) to a separate file; was in Semiring.lean before.~~ For `∀ i ∈ s, IsSetSemiring (C i))`, the product `s.pi '' s.pi C` is a semiring. Prove two auxiliary lemmas in `Data.Set.Prod` needed on the way. --- *This PR continues the work from #22714.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/22714* large-import t-measure-probability awaiting-author 260/14 Mathlib/Data/Set/Pairwise/Lattice.lean,Mathlib/Data/Set/Prod.lean,Mathlib/MeasureTheory/MeasurableSpace/Pi.lean,Mathlib/MeasureTheory/PiSystem.lean,Mathlib/MeasureTheory/SetSemiring.lean 5 6 ['github-actions', 'sgouezel'] kex-y
assignee:kex-y
14-55925
14 days ago
14-55925
14 days ago
31-59168
31 days
26479 thefundamentaltheor3m
author:thefundamentaltheor3m
feat(Analysis/Complex/CauchyIntegral): Cauchy–Goursat for Unbounded Rectangles In this PR, we prove versions of the Cauchy-Goursat theorem where the contours in question are rectangular and unbounded (ie, where the contours look like the $\bigsqcup$ symbol). I am not sure if I have formalised these in the best way, or if `Analysis.Complex.CauchyIntegral` is the best place for them (it might be prudent to reorganise the file into multiple files at some point), but I believe this is a useful result. Suggestions welcome. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) sphere-packing large-import new-contributor t-analysis 201/0 Mathlib/Analysis/Complex/CauchyIntegral.lean 1 1 ['github-actions'] nobody
14-49101
14 days ago
14-52661
14 days ago
0-0
0 seconds
26829 pechersky
author:pechersky
feat(RingTheory/Valuation): Valuation.leAddSubgroup and ideal/submodule versions of ltAddSubgroup Extracted from #25450 without changing how Valued works --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) @faenuccio hopefully this bypasses any wait on #14752 because I am not changing Valued files. t-ring-theory 173/0 Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/Integers.lean 2 7 ['JovanGerb', 'github-actions', 'mariainesdff', 'mathlib4-merge-conflict-bot', 'pechersky'] mariainesdff
assignee:mariainesdff
14-39953
14 days ago
56-30339
1 month ago
89-4853
89 days
26051 Komyyy
author:Komyyy
feat(Mathlib/GroupTheory/SpecificGroups/Alternating): A_n is simple iff n = 3 or 5 ≤ n --- - [x] depends on: #25299 - [x] depends on: #25314 - [x] depends on: #25367 - [x] depends on: #26098 - [x] depends on: #26552 - [x] depends on: #27498 - [x] depends on: #29234 This PR continues the work from #23555. Original PR: https://github.com/leanprover-community/mathlib4/pull/23555 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory large-import WIP 289/71 Mathlib.lean,Mathlib/GroupTheory/SpecificGroups/Alternating.lean,Mathlib/GroupTheory/SpecificGroups/Alternating/Simple.lean,Mathlib/GroupTheory/Subgroup/Simple.lean 4 13 ['Komyyy', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'tb65536'] nobody
14-34396
14 days ago
31-48711
1 month ago
10-66608
10 days
27500 Komyyy
author:Komyyy
feat: the Riemann zeta function is meromorphic Also proves that the Hurwitz zeta function is meromorphic. This PR is split from #27499 to leave a good git diff history. --- The `large-import` change occurs only in the new module, so it poses no problem. - [x] depends on: #27499 - [x] depends on: #29817 This PR continues the work from #25597. Original PR: https://github.com/leanprover-community/mathlib4/pull/25597 large-import t-analysis WIP 51/3 Mathlib.lean,Mathlib/Analysis/Meromorphic/Complex.lean,Mathlib/Analysis/Meromorphic/Gamma.lean 3 13 ['Komyyy', 'github-actions', 'j-loreaux', 'loefflerd', 'mathlib4-dependent-issues-bot'] j-loreaux
assignee:j-loreaux
14-27210
14 days ago
14-27632
14 days ago
30-62878
30 days
28057 plp127
author:plp127
feat(SuccOrder): simp lemma to refold `Order.succ` and `Order.pred` Adds `SuccOrder.succ_eq_succ` and `PredOrder.pred_eq_pred` to refold `SuccOrder.succ` and `PredOrder.pred` into `Order.succ` and `Order.pred`. These lemmas are marked `@[simp]`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author 8/2 Mathlib/Order/SuccPred/Basic.lean 1 3 ['YaelDillies', 'github-actions', 'plp127', 'vihdzp'] bryangingechen
assignee:bryangingechen
14-20105
14 days ago
14-20105
14 days ago
44-13238
44 days
29400 ShreckYe
author:ShreckYe
feat(`Algebra/BigOperators`): products of the results of insertion and removal on tuples and lists, and some needed lemmas large-import 102/0 Mathlib.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Defs.lean,Mathlib/Algebra/BigOperators/Group/Vector/Basic.lean,Mathlib/Data/Fin/Tuple/Basic.lean 6 6 ['ShreckYe', 'bryangingechen', 'eric-wieser', 'github-actions'] bryangingechen
assignee:bryangingechen
14-19837
14 days ago
26-55789
26 days ago
26-55834
26 days
27429 smorel394
author:smorel394
feat(RepresentationTheory/FinGroupCharZero): applications of Maschke's theorem Prove some properties of representations that follow from Maschke's theorem: * If `G` is a finite group whose order is invertible in a field `k`, then every object of `Rep k G` (resp. `FDRep k G`) is injective and projective. * For an object `V` of `FDRep k G`, when `k` is an algebraically closed field in which the order of `G` is invertible: (1) `V` is simple if and only `V ⟶ V` is a `k`-vector space of dimension `1` (`FDRep.simple_iff_end_is_rank_one`); (2) When `k` is characteristic zero, `V` is simple if and only if `∑ g : G, V.character g * V.character g⁻¹ = Fintype.card G` (`FDRep.simple_iff_char_is_norm_one`). Note: This used to be #27165, but it was closed for some reason I don't understand. - [x] depends on: #27154 - [x] depends on: #27134 - [x] depends on: #27125 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
135/0 Mathlib.lean,Mathlib/RepresentationTheory/FinGroupCharZero.lean 2 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] jcommelin
assignee:jcommelin
14-8010
14 days ago
21-40147
21 days ago
21-40499
21 days
29562 ShreckYe
author:ShreckYe
feat(Analysis/SpecialFunctions/Trigonometric): tangent half-angle substitution t-analysis 82/0 Mathlib/Analysis/SpecialFunctions/Trigonometric/Complex.lean 1 1 ['github-actions'] urkud
assignee:urkud
14-8005
14 days ago
22-39247
22 days ago
22-39288
22 days
29587 uniwuni
author:uniwuni
feat(GroupTheory/Finiteness): define finitely generated semigroups We define finitely generated semigroups and basics similarly to monoids and groups and prove that semigroups and monoids remain finitely generated when a congruence is quotiented out. This will be important when further developing semigroup theory. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 259/14 Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/GroupTheory/Finiteness.lean 2 3 ['github-actions', 'plp127', 'uniwuni'] dupuisf
assignee:dupuisf
14-8004
14 days ago
21-54188
21 days ago
21-54166
21 days
29047 grunweg
author:grunweg
chore(1000.yaml): add Fourier's theorem Mathlib has some form of it already; while there is space for more advanced versions, let's surface the current progress already. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) delegated 5/1 docs/1000.yaml 1 6 ['Ruben-VandeVelde', 'bryangingechen', 'github-actions', 'mathlib-bors', 'mcdoll', 'riccardobrasca'] nobody
13-55466
13 days ago
36-50943
1 month ago
0-17788
4 hours
29235 yoh-tanimoto
author:yoh-tanimoto
feat(Topology/Algebra/Module/ClosedSubmodule): add `mapEquiv`, a variation of `ClosedSubmodule.map` for CLE add `ClosedSubmodule.mapEquiv` for continuous linear equivalence. In this case, a closed submodule is mapped to a closed submodule, so the definitions are easier and behave nicely with `closure` and `⊔`. motivation: needed to define standard subspaces in a Hilbert space (scalar multiplication by `Complex.I`) #29251 https://ems.press/content/serial-article-files/48171 - [x] depends on: #29230 for `Lattice` `CompleteLattice` t-topology 69/1 Mathlib/Topology/Algebra/Module/ClosedSubmodule.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] fpvandoorn
assignee:fpvandoorn
13-17739
13 days ago
21-37553
21 days ago
21-39841
21 days
26720 vlad902
author:vlad902
feat(SimpleGraph): lemmas relating edges and darts to the support Useful lemmas to make it easier to pass between the support/edges/darts of a walk. - [ ] depends on: #25812 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 27/0 Mathlib/Combinatorics/SimpleGraph/Walk.lean 1 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
13-7990
13 days ago
22-37418
22 days ago
22-37497
22 days
29776 yuanyi-350
author:yuanyi-350
chore(Functional Analysis) : refactor `ContinuousLinearMap.isOpenMap` by separating it into sublemmas The open mapping theorem in mathlib proves A ⇒ C by first proving A ⇒ B and then B ⇒ C in one theorem. In my PR, I separated it into two theorems: A ⇒ B and B ⇒ C. And now B ⇒ C is more general, with weaker assumptions than A ⇒ C. The [open mapping theorem](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Normed/Operator/Banach.html#ContinuousLinearMap.isOpenMap) in mathlib need `f` to be surjective. However, this can be weakened to the condition `h : ∃ (n : ℕ) (x : _), x ∈ interior (closure (f '' ball 0 n))` . I need this stronger formulation to prove the closed range theorem c.f. *Rudin Functional Analysis Thm 4.13* [zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/refactor.20.60ContinuousLinearMap.2EisOpenMap.60) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis awaiting-author WIP 44/24 Mathlib/Analysis/Normed/Operator/Banach.lean 1 12 ['faenuccio', 'github-actions', 'kckennylau', 'leanprover-bot', 'themathqueen', 'yuanyi-350'] faenuccio
assignee:faenuccio
12-52026
12 days ago
13-6161
13 days ago
2-46827
2 days
29500 vihdzp
author:vihdzp
feat: `WellFoundedLT (LowerSet α)` We prove that `LowerSet α` is well-founded when `α` is a WQO. --- This result is used in the CGT repository to construct the poset game! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author 31/0 Mathlib.lean,Mathlib/Order/UpperLower/WellFounded.lean 2 2 ['github-actions', 'plp127'] bryangingechen
assignee:bryangingechen
12-51627
12 days ago
12-51627
12 days ago
10-85553
10 days
29347 themathqueen
author:themathqueen
refactor(Algebra/Star/StarAlgHom): let `StarAlgEquiv` extend `StarRingEquiv` instead of `RingEquiv` Instead of having `StarAlgEquiv` extend `RingEquiv` and have properties `map_star'` and `map_smul'`, it now extends `StarRingEquiv` with only `map_smul'`. --- Will add more API in the next PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
29/36 Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean 2 5 ['github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'themathqueen'] kbuzzard
assignee:kbuzzard
12-21577
12 days ago
27-20920
27 days ago
29-43876
29 days
29870 mckoen
author:mckoen
feat(CategoryTheory/Adhesive): subobjects in adhesive categories have binary coproducts A formalization of Theorem 5.1 in https://www.ioc.ee/~pawel/papers/adhesivejournal.pdf. Given `A B Z : C` with `C` adhesive, and `a : A ⟶ Z`, ` b : B ⟶ Z` monomorphisms, then `pushout.desc a b pullback.condition` is also a monomorphism. This result will be useful in showing that the pushout-product of monomorphisms is also a monomorphism. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory WIP 118/0 Mathlib/CategoryTheory/Adhesive.lean 1 1 ['github-actions'] nobody
12-15509
12 days ago
12-15556
12 days ago
0-9
9 seconds
29744 espottesmith
author:espottesmith
feat(Combinatorics): define directed hypergraphs This PR defines directed hypergraphs: ``` @[ext] structure DiHypergraph (α : Type*) where /-- The vertex set -/ vertexSet : Set α /-- The edge set -/ edgeSet : Set ((Set α) × (Set α)) /-- Each edge is a pair (s, d), where s ⊆ vertexSet and d ⊆ vertexSet -/ edge_src_dst_isSubset_vertexSet' : ∀ ⦃e⦄, e ∈ edgeSet → e.1 ⊆ vertexSet ∧ e.2 ⊆ vertexSet ``` Additional definitions: - tail/head stars and negative/positive stars - some special cases (B-Graph, F-Graph, BF-Graph, and what I'm calling a "non-endless" dihypergraph, where neither the source/tail nor the destination/head are empty) - Vertex and (hyper)edge adjacency - isolated vertices - empty and nonempty dihypergraphs The design employed here is based off of #28613, but this PR does not depend on that one. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 391/0 Mathlib.lean,Mathlib/Combinatorics/DiHypergraph/Basic.lean 2 1 ['github-actions'] nobody
11-50470
11 days ago
16-57003
16 days ago
16-57050
16 days
22151 alreadydone
author:alreadydone
feat(RingTheory): a semiprimary ring is Noetherian/Artinian iff its Jacobson radical is fg A key fact used is `Module.FG.smul`: if `I` is a two-sided ideal of `R` that is f.g. as a left ideal and `N` is a f.g. `R`-module, then `I • M` is also a f.g. `R`-module. Many lemmas about coprimality of ideals are also generalized to the noncommutative, two-sided setting. --- - [x] depends on: #21904 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 233/166 Mathlib/Algebra/Algebra/Operations.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/RingTheory/Extension/Basic.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/Finiteness/Ideal.lean,Mathlib/RingTheory/HopkinsLevitzki.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Operations.lean 9 10 ['alreadydone', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] eric-wieser
assignee:eric-wieser
11-25341
11 days ago
11-25407
11 days ago
191-24463
191 days
29827 js2357
author:js2357
feat: define two (trivial) ContinuousMulEquivs Define two trivial `ContinuousMulEquiv`s: `ContinuousMulEquiv.piUnique` is the topological version of `MulEquiv.piUnique`. `ContinuousMulEquiv.piEquivPiSubtypeProd` is the multiplicative version of `Homeomorph.piEquivPiSubtypeProd`. Done for the FLT project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import FLT new-contributor t-topology 25/0 Mathlib/Topology/Algebra/ContinuousMonoidHom.lean 1 2 ['github-actions', 'grunweg'] nobody
11-22954
11 days ago
13-60091
13 days ago
14-2275
14 days
29899 eric-wieser
author:eric-wieser
chore: add `=Q` arguments to ring casting operations This also detects an `isDefeq` which is unifying across universes and types, which I remember rumors about being sometimes a bad idea. I'm a little worried that the `=Q` design here runs into DTT hell, but it works in the one place that is "Qq-clean" right now, so I'd be inclined to apply it to help us learn more about the pattern in future. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 36/23 Mathlib/Tactic/Ring/Basic.lean 1 1 ['github-actions'] nobody
11-10943
11 days ago
11-10954
11 days ago
0-0
0 seconds
29497 xyzw12345
author:xyzw12345
feat(Counterexamples): A ring such that dim A = 1 but dim A[x] = 3 In this PR, we constructed an example of a commutative ring `A` that satisfies `ringKrullDim A = 1` but `ringKrullDim A[X] = 3`, following the construction of https://math.stackexchange.com/questions/1267419/examples-of-rings-whose-polynomial-rings-have-large-dimension --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
176/0 Counterexamples.lean,Counterexamples/DimensionPolynomial.lean,Mathlib.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/RingTheory/KrullDimension/LocalRing.lean,Mathlib/RingTheory/LocalRing/MaximalIdeal/Basic.lean 7 15 ['github-actions', 'joelriou', 'kbuzzard', 'kckennylau', 'kim-em', 'xyzw12345'] joelriou
assignee:joelriou
11-10329
11 days ago
11-10329
11 days ago
22-40532
22 days
29626 themathqueen
author:themathqueen
chore(Algebra/Order/Module/PositiveLinearMap): generalize `OrderHomClass.ofLinear` Generalize `OrderHomClass.ofLinear` from linear maps to additive group homomorphisms. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra easy
label:t-algebra$
10/11 Mathlib/Algebra/Order/Module/PositiveLinearMap.lean,Mathlib/Analysis/CStarAlgebra/CompletelyPositiveMap.lean 2 5 ['Ruben-VandeVelde', 'github-actions', 'themathqueen'] Vierkantor
assignee:Vierkantor
11-8003
11 days ago
18-47562
18 days ago
20-25916
20 days
29656 jsm28
author:jsm28
feat(Geometry/Euclidean/Angle/Bisector): bisecting angles and equal distances Prove a lemma ```lean /-- A point `p` is equidistant to two affine subspaces if and only if the angles at a point `p'` in their intersection between `p` and its orthogonal projections onto the subspaces are equal. -/ lemma dist_orthogonalProjection_eq_iff_angle_eq {p p' : P} {s₁ s₂ : AffineSubspace ℝ P} [s₁.direction.HasOrthogonalProjection] [s₂.direction.HasOrthogonalProjection] (hp' : p' ∈ s₁ ⊓ s₂) : haveI : Nonempty s₁ := ⟨p', hp'.1⟩ haveI : Nonempty s₂ := ⟨p', hp'.2⟩ dist p (orthogonalProjection s₁ p) = dist p (orthogonalProjection s₂ p) ↔ ∠ p p' (orthogonalProjection s₁ p) = ∠ p p' (orthogonalProjection s₂ p) := by ``` that gives the basic fact relating equal distances to affine subspaces, and bisecting angles involving those subspaces, needed to connect `incenter` and `excenter` to bisecting angles. (Other pieces involved in getting such a statement for angles involving vertices of a triangle rather than just touchpoints include #29410, #29413, #29418 and their dependencies.) I expect the new file `Bisector.lean` to be an appropriate place to end up with actual definitions of bisectors as submodules and affine subspaces; those definitions aren't needed for my immediate goals with `incenter` and `excenter`, but it seems appropriate to use such a file for lemmas relating to bisectors whether or not they explicitly involve such definitions. I do expect to add similar statements involving oriented angles in a followup, so the imports of this new file should be expected to increase. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry 118/0 Mathlib.lean,Mathlib/Geometry/Euclidean/Angle/Bisector.lean 2 7 ['eric-wieser', 'github-actions', 'jsm28'] JovanGerb
assignee:JovanGerb
11-8001
11 days ago
19-8124
19 days ago
19-8103
19 days
29688 tb65536
author:tb65536
feat(FieldTheory/IsGaloisGroup): prove the Galois correspondence for `IsGaloisGroup` This PR reproves the Galois correspondence for `IsGaloisGroup`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
89/0 Mathlib/FieldTheory/Galois/IsGaloisGroup.lean 1 1 ['github-actions'] joneugster
assignee:joneugster
11-7999
11 days ago
18-22715
18 days ago
18-22694
18 days
29582 YaelDillies
author:YaelDillies
chore: rename `_root_.prop` to `Prop.finite` This was a surprising name! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-zulip 1/1 Mathlib/Data/Fintype/EquivFin.lean 1 11 ['YaelDillies', 'bryangingechen', 'eric-wieser', 'github-actions', 'grunweg', 'plp127'] nobody
10-82851
10 days ago
10-82852
10 days ago
3-1360
3 days
27215 kckennylau
author:kckennylau
feat(AlgebraicGeometry): Define the Zariski site on `CommRingCatᵒᵖ` We define the Zariski site on `CommRingCatᵒᵖ` by inducing the topology from `Scheme`, and then we show that this topology is equal to the one generated by the pretopology of finite, surjective, and standard open morphisms. --- - [x] depends on: #28614 - [x] depends on: #28615 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry awaiting-author 312/0 Mathlib.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean,Mathlib/AlgebraicGeometry/Sites/BigAffineZariski.lean 3 32 ['chrisflav', 'github-actions', 'joelriou', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] chrisflav
assignee:chrisflav
10-62271
10 days ago
10-62271
10 days ago
4-4834
4 days
29458 LiamSchilling
author:LiamSchilling
feat(MvPolynomial/WeightedHomogenous): relate `weightedTotalDegree` to `degrees`, `totalDegree`, and `degreeOf` `weightedTotalDegree` is the most general notion of multivariate degree in mathlib. These theorems show that it specializes to `degrees`, `totalDegree`, and `degreeOf` with specialized weights. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor awaiting-author 24/1 Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean 1 5 ['chrisflav', 'github-actions'] chrisflav
assignee:chrisflav
10-61039
10 days ago
10-61039
10 days ago
14-19311
14 days
26660 strihanje01
author:strihanje01
feat(Combinatorics/Additive/VerySmallDoubling): weak non-commutative Kneser's theorem add theorem about the structure of a doubling smaller than the golden ratio --- - [x] depends on: #28653 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import maintainer-merge new-contributor t-combinatorics 215/41 Mathlib/Algebra/Group/Action/Pointwise/Finset.lean,Mathlib/Combinatorics/Additive/VerySmallDoubling.lean 2 79 ['YaelDillies', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'strihanje01'] YaelDillies
assignee:YaelDillies
10-50518
10 days ago
10-83167
10 days ago
52-25145
52 days
29806 adomani
author:adomani
feat: add some name validation for authors The check consists of verifying that each file has at least one Copyright holder and one Author. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter 64/5 Mathlib/Probability/HasLaw.lean,Mathlib/Tactic/Linter/Header.lean,MathlibTest/Header.lean 3 10 ['adomani', 'github-actions', 'grunweg'] grunweg
assignee:grunweg
10-47890
10 days ago
12-42621
12 days ago
13-42594
13 days
27323 kckennylau
author:kckennylau
chore: make the arguments of fiberInclusion explicit --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 18/17 Mathlib/CategoryTheory/FiberedCategory/Fiber.lean,Mathlib/CategoryTheory/FiberedCategory/HasFibers.lean 2 2 ['github-actions', 'joelriou'] nobody
10-46987
10 days ago
74-63553
2 months ago
74-63556
74 days
27216 D-Thomine
author:D-Thomine
feat(Cardinal/Finite): ENat powers and cardinality This PR continues the work from #25574. Original PR: https://github.com/leanprover-community/mathlib4/pull/25574 t-algebra
label:t-algebra$
209/4 Mathlib.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/ENat/Pow.lean,Mathlib/SetTheory/Cardinal/Finite.lean 4 21 ['D-Thomine', 'eric-wieser', 'github-actions', 'kbuzzard', 'mathlib4-merge-conflict-bot'] kbuzzard
assignee:kbuzzard
10-46306
10 days ago
10-46333
10 days ago
73-19563
73 days
28175 dsfxcimk
author:dsfxcimk
feat: exterior angle theorem Add Exterior angle theorem --- The Exterior Angle Theorem states that the exterior angle of a triangle equals the sum of the two non-adjacent interior angles. I plan to place this in Mathlib.Geometry.Euclidean.Triangle [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-euclidean-geometry awaiting-author 10/0 Mathlib/Geometry/Euclidean/Triangle.lean,docs/1000.yaml 2 16 ['FrankieNC', 'JovanGerb', 'dsfxcimk', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'themathqueen'] nobody
10-37862
10 days ago
24-50729
24 days ago
28-57160
28 days
25799 dagurtomas
author:dagurtomas
feat(CategoryTheory): the universal property of localized monoidal categories This PR provides a monoidal structure on any functor out of a localized monoidal category whose precomposition with the localization functor is monoidal --- - [x] depends on: #29564 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24727.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24727* file-removed t-category-theory 244/2 Mathlib.lean,Mathlib/CategoryTheory/Localization/Bifunctor.lean,Mathlib/CategoryTheory/Localization/Monoidal/Basic.lean,Mathlib/CategoryTheory/Localization/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/Multifunctor.lean,Mathlib/CategoryTheory/Monoidal/NaturalTransformation.lean,Mathlib/CategoryTheory/Sites/Monoidal.lean 8 20 ['dagurtomas', 'github-actions', 'joelriou', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] TwoFX
assignee:TwoFX
10-33743
10 days ago
10-36770
10 days ago
25-26445
25 days
29409 Julian
author:Julian
feat(Mathlib/Analysis): deriv_eq_self and deriv_exp_iff --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 32/0 Mathlib/Analysis/SpecialFunctions/ExpDeriv.lean 1 4 ['Paul-Lez', 'eric-wieser', 'github-actions', 'j-loreaux'] j-loreaux
assignee:j-loreaux
10-33074
10 days ago
10-33353
10 days ago
15-76317
15 days
29624 mcdoll
author:mcdoll
feat(LinearAlgebra/LinearPMap): add definition of resolvent and first resolvent identity --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
180/2 Mathlib/LinearAlgebra/LinearPMap.lean 1 2 ['github-actions', 'mcdoll'] kim-em
assignee:kim-em
10-21767
10 days ago
18-32718
18 days ago
18-32697
18 days
27887 JovanGerb
author:JovanGerb
feat: `to_dual` attribute This PR defines the `to_dual` attribute for translating lemmas to their dual. This is useful in order theory and in category theory. It is built on top of the `to_additive` machinery. This PR only adds `@[to_dual]` tags in files that directly need to import `ToDual`, namely `Order/Defs/PartialOrder`, `Order/Notation` and `Combinatorics/Quiver/Basic`. Further tagging is left for (many) future PRs. This PR continues the work from #21719 Related (mathlib3) issues: - https://github.com/leanprover-community/mathlib3/issues/13461 - https://github.com/leanprover-community/mathlib3/issues/7691 Co-authored-by: @bryangingechen --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-meta 597/276 Mathlib.lean,Mathlib/Combinatorics/Quiver/Basic.lean,Mathlib/GroupTheory/Coset/Defs.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/Order/Basic.lean,Mathlib/Order/Defs/PartialOrder.lean,Mathlib/Order/Notation.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ToAdditive/Frontend.lean,Mathlib/Tactic/ToAdditive/GuessName.lean,Mathlib/Tactic/ToAdditive/ToDual.lean,Mathlib/Tactic/ToDual.lean,MathlibTest/toAdditive.lean,scripts/noshake.json 15 13 ['JovanGerb', 'bryangingechen', 'github-actions', 'mathlib4-merge-conflict-bot'] alexjbest
assignee:alexjbest
10-15621
10 days ago
10-16358
10 days ago
35-46930
35 days
28818 NotWearingPants
author:NotWearingPants
feat(Data/Setoid/Basic): add theorems about lifting a function to its kernel Currently `ker_lift_injective` and `quotientKerEquivOfRightInverse` lift `f` to `ker f` in their definition. This PR makes this function available as `Setoid.ker_lift f` and adds a few more theorems about it. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor easy 29/15 Counterexamples/AharoniKorman.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/FundamentalCone.lean,Mathlib/Topology/Separation/Hausdorff.lean 4 18 ['NotWearingPants', 'eric-wieser', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] nobody
10-11015
10 days ago
21-31499
21 days ago
39-46440
39 days
29920 urkud
author:urkud
feat: separable but not second countable LOTS --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 55/0 Counterexamples.lean,Counterexamples/SeparableNotSecondCountable.lean,Mathlib/Data/Prod/Lex.lean 3 1 ['github-actions'] nobody
10-8560
10 days ago
10-17044
10 days ago
10-17079
10 days
29715 ADedecker
author:ADedecker
feat: generalize `IsClosed.vadd_right_of_isCompact` to proper actions I realized a few weeks after adding them to Mathlib that the more conceptual approach for lemmas of the form "`s • t` is closed when one of `s` and `t` is closed and the other is compact" is that of proper maps and proper actions. This PR switches to this approach. More precisely: - I refactored the proof [IsClosed.smul_left_of_isCompact](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Algebra/Group/Pointwise.html#IsClosed.smul_left_of_isCompact) in terms of properness. The proof is essentially the same length, but conceptually simpler. - More importantly, I generalize [IsClosed.vadd_right_of_isCompact](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Algebra/Group/AddTorsor.html#IsClosed.vadd_right_of_isCompact) from topological torsors to proper actions. Note that I do not assume separation, which creates some troubles as compact sets are not closed... - To support the above, I introduce a bit more API on proper maps - I also moved `isProperMap_iff_isClosedMap_filter` to `Topology/Maps/Proper/UniversallyClosed`, together with the ultrafilter analog. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-topology 196/93 Mathlib/Topology/Algebra/Group/AddTorsor.lean,Mathlib/Topology/Algebra/Group/Pointwise.lean,Mathlib/Topology/Algebra/ProperAction/Basic.lean,Mathlib/Topology/Algebra/ProperAction/ProperlyDiscontinuous.lean,Mathlib/Topology/LocalAtTarget.lean,Mathlib/Topology/Maps/Proper/Basic.lean,Mathlib/Topology/Maps/Proper/UniversallyClosed.lean 7 2 ['ADedecker', 'github-actions'] grunweg
assignee:grunweg
10-7997
10 days ago
17-54014
17 days ago
17-54054
17 days
29539 YaelDillies
author:YaelDillies
feat: monoid algebras are invariant under base change From Toric Co-authored-by: Michał Mrugała --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory toric large-import 112/6 Mathlib.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/RingTheory/TensorProduct/MonoidAlgebra.lean 3 5 ['YaelDillies', 'github-actions', 'plp127'] mattrobball
assignee:mattrobball
9-76679
9 days ago
22-75451
22 days ago
22-76855
22 days
27162 themathqueen
author:themathqueen
feat(Analysis/InnerProductSpace/Positive): `U.starProjection ≤ V.starProjection` iff `U ≤ V` For symmetric projections `p` and `q`, `p ≤ q` iff `range p ≤ range q`, so then: `U.starProjection ≤ V.starProjection` iff `U ≤ V`, which implies that `Submodule.starProjection` is an injective function. --- - [x] depends on: #25910 - [x] depends on: #27619 - [x] depends on: #27642 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 47/0 Mathlib/Analysis/InnerProductSpace/Positive.lean,Mathlib/Analysis/InnerProductSpace/Symmetric.lean 2 11 ['github-actions', 'j-loreaux', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'themathqueen'] j-loreaux
assignee:j-loreaux
9-75077
9 days ago
10-25777
10 days ago
39-54916
39 days
27817 zhuyizheng
author:zhuyizheng
feat: add IMO2025P1 Add a solution to IMO2025P1, the original problem statement from https://github.com/jsm28/IMOLean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO new-contributor 1310/0 Archive.lean,Archive/Imo/Imo2025Q1.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] dwrensha
assignee:dwrensha
9-57521
9 days ago
14-76993
14 days ago
47-15701
47 days
29322 xroblot
author:xroblot
feat(RingTheory/Localization/AtPrime): bijection between prime ideals Let `R ⊆ S` be an extension of rings and `p` be a prime ideal of `R`. Denote by `Rₚ` the localization of `R` at the complement of `p` and by `Sₚ` the localization of `S` at the (image) of the complement of `p`. In this PR, we study the extension `Rₚ ⊆ Sₚ` and the relation between the (nonzero) prime ideals of `Sₚ` and the prime ideals of `S` above `p`. In particular, we prove that (under suitable conditions) they are in bijection. In a following PR #27706, we prove that the residual degree and ramification index are preserved by this bijection. Note. The new file `RingTheory.Localization.AtPrime.Extension` is imported in `RingTheory.Trace.Quotient` because one function from the latter was moved to the former, but the plan is eventually to move the isomorphisms proved in `RingTheory.Trace.Quotient` to `RingTheory.Localization.AtPrime.Basic` and `RingTheory.Localization.AtPrime.Extension` where they belong. This will be done in #27706. --- t-ring-theory 145/8 Mathlib.lean,Mathlib/RingTheory/DedekindDomain/Instances.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/Localization/AtPrime/Extension.lean,Mathlib/RingTheory/Trace/Quotient.lean 6 1 ['github-actions'] chrisflav
assignee:chrisflav
9-54016
9 days ago
30-40132
1 month ago
30-40169
30 days
27244 xroblot
author:xroblot
feat(RingTheory/DedekindDomain): lifting an ideal in an extension is injective This PR develops some API for [FractionalIdeal.extendedHomₐ](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/FractionalIdeal/Extended.html#FractionalIdeal.extendedHom%E2%82%90) and in particular proves when it is an injective map. As a consequence, it deduces the fact that lifting an integral ideal in an extension of Dedekind domains is an injective map. Note: the import increase happens in a leaf file `Mathlib.RingTheory.FractionalIdeal.Extended` --- - [x] depends on: #28800 t-ring-theory large-import 140/8 Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/FractionalIdeal/Extended.lean,Mathlib/RingTheory/Localization/Basic.lean 3 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'xroblot'] kbuzzard
assignee:kbuzzard
9-53946
9 days ago
30-50914
1 month ago
66-55497
66 days
26396 xroblot
author:xroblot
feat(RingTheory): define the dual of a basis for the trace and prove basic properties Specialize the construction of `BilinForm.dualBasis` to the case of the trace and proves basic results about it. This will be useful for future works on the [Submodule.traceDual](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/DedekindDomain/Different.html#Submodule.traceDual) --- t-ring-theory 121/38 Mathlib/LinearAlgebra/BilinearForm/Properties.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/Trace/Basic.lean 3 3 ['github-actions', 'mathlib4-merge-conflict-bot'] adomani
assignee:adomani
9-53718
9 days ago
18-47020
18 days ago
99-14643
99 days
26155 xroblot
author:xroblot
feat(DedekindDomain/Different): add the transitivity formula This PR proves the transitivity formula for the different ideal. The PR also adds one new instance: - `FiniteDimensional (FractionRing A) (FractionRing B)` deduced from `Module.Finite A B` when `B` is a Dedekind domain. --- t-algebra
label:t-algebra$
177/10 Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/DedekindDomain/IntegralClosure.lean,Mathlib/RingTheory/FractionalIdeal/Extended.lean,Mathlib/RingTheory/Localization/Basic.lean 4 15 ['erdOne', 'github-actions', 'mathlib4-merge-conflict-bot', 'xroblot'] Vierkantor
assignee:Vierkantor
9-53682
9 days ago
29-69259
29 days ago
101-76109
101 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. new-contributor t-analysis awaiting-author 383/0 Mathlib/Analysis/Complex/Residue/Basic.lean 1 17 ['Periecle', 'github-actions', 'hrmacbeth', 'llllvvuu', 'loefflerd'] nobody
9-46253
9 days ago
20-48356
20 days ago
1-5255
1 day
26071 linesthatinterlace
author:linesthatinterlace
feat: Add `id` and `comp` classes for `FunLike` and `refl`, `trans` and `symm` classes for `EquivLike` Adds classes depending on `FunLike` that capture "this has an identity/this has a notion of composition". --- This is a prototype and comments on this are requested. I think a similar model could be used to create a generalisation for Equiv.symm. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor RFC WIP 314/23 Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/FunLike/Equiv.lean,Mathlib/Logic/Equiv/Defs.lean 3 21 ['Rob23oba', 'github-actions', 'leanprover-community-bot-assistant', 'linesthatinterlace'] nobody
9-42520
9 days ago
9-42576
9 days ago
0-1
1 second
28871 JaafarTanoukhi
author:JaafarTanoukhi
feat(Combinatorics/Digraph): Tournaments Define orientations and tournaments. Related to #26771. Co-authored-by: Rida Hamadani --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 62/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Orientation.lean,Mathlib/Combinatorics/Digraph/Tournament.lean 3 5 ['JaafarTanoukhi', 'NotWearingPants', 'Rida-Hamadani', 'github-actions'] kmill
assignee:kmill
9-37654
9 days ago
40-27891
1 month ago
40-27927
40 days
28497 euprunin
author:euprunin
chore: golf entire `isLocalHom_residue` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author 2/7 Mathlib/RingTheory/LocalRing/ResidueField/Basic.lean 1 4 ['Ruben-VandeVelde', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
9-31576
9 days ago
9-31612
9 days ago
1-84232
1 day
28967 utkuokur
author:utkuokur
refactor(Combinatorics/SimpleGraph/Walk): simplify proof of "support_tail_of_not_nil" The proof of the lemma named "support_tail_of_not_nil" is shortened. Since "support_tail" is not needed anymore, it is removed. @[deprecated (since := "2025-08-26")] sign is added for the removed "support_tail". The library references to "support_tail" are replaced with "support_tail_of_not_nil". To keep [@simp] on "cons_support_tail" and avoid the linter error, the [@simp] of "support_tail_of_not_nil" (previously on "support_tail") is removed. There might be a better way that I am missing, to deal with the linter error. --- Additionally, a merge conflict with `master` was resolved by keeping the generalized `support_tail_of_not_nil` and reintroducing `support_tail` as a deprecated alias for compatibility. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 7/10 Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Walk.lean 2 3 ['github-actions', 'mathlib4-merge-conflict-bot', 'themathqueen'] awainverse
assignee:awainverse
9-28968
9 days ago
25-23140
25 days ago
38-39054
38 days
29949 adomani
author:adomani
test: remove deprecated declarations --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-linter awaiting-author WIP 180/0 Mathlib.lean,Mathlib/Init.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/RemoveDeprecations.lean,lakefile.lean 5 2 ['adomani', 'github-actions'] bryangingechen
assignee:bryangingechen
9-23750
9 days ago
9-23757
9 days ago
0-0
0 seconds
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 t-ring-theory awaiting-author 77/8 Mathlib/Algebra/Polynomial/Coeff.lean,Mathlib/RingTheory/Polynomial/SmallDegreeVieta.lean 2 46 ['chrisflav', 'github-actions', 'kckennylau', 'mans0954', 'ocfnash'] chrisflav
assignee:chrisflav
9-21816
9 days ago
10-63231
10 days ago
82-34290
82 days
27307 xyzw12345
author:xyzw12345
feat(RingTheory/GradedAlgebra): homogeneous relation This PR continues the work from #22279. Original PR: https://github.com/leanprover-community/mathlib4/pull/22279 t-ring-theory 391/0 Mathlib.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousRelation.lean 9 9 ['chrisflav', 'eric-wieser', 'github-actions', 'ocfnash', 'xyzw12345'] mattrobball
assignee:mattrobball
9-8001
9 days ago
60-34388
1 month ago
75-45705
75 days
28295 artie2000
author:artie2000
feat(Algebra/Order/Ring/Ordering): basic results about ring (pre)orderings * Basic automation for membership of ring orderings * Alternative constructors for ring preorderings and ring orderings * Basic results about ring preorderings and their supports, including the special case over a field --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #27282 maintainer-merge t-algebra
label:t-algebra$
203/0 Mathlib.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Order/Ring/Ordering/Basic.lean 3 57 ['Rob23oba', 'YaelDillies', 'artie2000', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vihdzp'] joneugster
assignee:joneugster
9-7999
9 days ago
16-74338
16 days ago
22-37474
22 days
29596 alreadydone
author:alreadydone
chore(Algebra): extract `Submonoid.IsLocalizationMap` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
282/119 Mathlib.lean,Mathlib/Algebra/Module/LocalizedModule/IsLocalization.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/Lemmas.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/RingTheory/Extension/Presentation/Submersive.lean,Mathlib/RingTheory/Localization/Defs.lean 7 3 ['github-actions', 'mathlib4-merge-conflict-bot'] kim-em
assignee:kim-em
9-7997
9 days ago
16-47954
16 days ago
20-60877
20 days
29723 Ruben-VandeVelde
author:Ruben-VandeVelde
feat: add TensorProduct.piScalarRight_symm_algebraMap --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) FLT t-algebra
label:t-algebra$
5/0 Mathlib/LinearAlgebra/TensorProduct/Pi.lean 1 3 ['Ruben-VandeVelde', 'github-actions', 'themathqueen'] joneugster
assignee:joneugster
9-7994
9 days ago
17-41891
17 days ago
17-41927
17 days
29955 qawbecrdtey
author:qawbecrdtey
feat(Data/Set/Subsingleton): added new lemma `Subsingleton.union_subsingleton` along with some trivial code cleanup --- Added a lemma which implies both sets are subsingleton if their union is subsingleton. ```lean lemma Subsingleton.union_subsingleton (h : (s ∪ t).Subsingleton) : s.Subsingleton ∧ t.Subsingleton ``` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 9/3 Mathlib/Data/Set/Subsingleton.lean 1 1 ['github-actions'] nobody
9-1754
9 days ago
9-1767
9 days ago
9-1805
9 days
29719 kim-em
author:kim-em
feat(Topology/Algebra/Group/Units): add topological properties of units ## Summary Add lemmas about units in topological monoids: - `Submonoid.units_isOpen`: units of open submonoids are open in the units topology - `ContinuousMulEquiv.piUnits`: homeomorphism between units of a product and product of units This content was prepared by Claude from the FLT project. Source file: `/Users/kim/projects/lean/flt/FLT/Mathlib/Topology/Algebra/Group/Units.lean` GitHub source: https://github.com/ImperialCollegeLondon/FLT/blob/main/FLT/Mathlib/Topology/Algebra/Group/Units.lean 🤖 Generated with [Claude Code](https://claude.ai/code) FLT t-topology awaiting-author 53/0 Mathlib.lean,Mathlib/Topology/Algebra/Group/Units.lean 2 7 ['Ruben-VandeVelde', 'github-actions', 'kim-em', 'plp127'] ADedecker
assignee:ADedecker
8-66339
8 days ago
10-4685
10 days ago
7-43192
7 days
29221 euprunin
author:euprunin
chore: remove redundant `rintro` invocations (before `omega`) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) easy 0/3 Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Data/List/Range.lean 2 5 ['github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] RemyDegenne
assignee:RemyDegenne
8-66265
8 days ago
8-66265
8 days ago
31-73908
31 days
28574 euprunin
author:euprunin
chore(Topology/Category): golf entire `finiteCoproduct.ι_desc_apply`, `piIsoPi_hom_apply`, `prodIsoProd_hom_apply` and `pullbackIsoProdSubtype_hom_apply` using `tauto` and `rfl` ---
Show trace profiling of finiteCoproduct.ι_desc_apply: 15 ms before, 25 ms after ### Trace profiling of `finiteCoproduct.ι_desc_apply` before PR 28574 ```diff diff --git a/Mathlib/Topology/Category/CompHausLike/Limits.lean b/Mathlib/Topology/Category/CompHausLike/Limits.lean index 493c277fec..216c5888f2 100644 --- a/Mathlib/Topology/Category/CompHausLike/Limits.lean +++ b/Mathlib/Topology/Category/CompHausLike/Limits.lean @@ -109,6 +109,7 @@ lemma finiteCoproduct.ι_injective (a : α) : Function.Injective (finiteCoproduc lemma finiteCoproduct.ι_jointly_surjective (R : finiteCoproduct X) : ∃ (a : α) (r : X a), R = finiteCoproduct.ι X a r := ⟨R.fst, R.snd, rfl⟩ +set_option trace.profiler true in lemma finiteCoproduct.ι_desc_apply {B : CompHausLike P} {π : (a : α) → X a ⟶ B} (a : α) : ∀ x, finiteCoproduct.desc X π (finiteCoproduct.ι X a x) = π a x := by intro x ``` ``` ℹ [985/985] Built Mathlib.Topology.Category.CompHausLike.Limits (1.9s) info: Mathlib/Topology/Category/CompHausLike/Limits.lean:113:0: [Elab.command] [0.011940] theorem ι_desc_apply {B : CompHausLike P} {π : (a : α) → X a ⟶ B} (a : α) : ∀ x, finiteCoproduct.desc X π (finiteCoproduct.ι X a x) = π a x := by intro x change (ι X a ≫ desc X π) _ = _ simp only [ι_desc] [Elab.definition.header] [0.011212] CompHausLike.finiteCoproduct.ι_desc_apply [Elab.step] [0.010053] expected type: Sort ?u.7530, term ∀ x, finiteCoproduct.desc X π (finiteCoproduct.ι X a x) = π a x info: Mathlib/Topology/Category/CompHausLike/Limits.lean:113:0: [Elab.command] [0.012175] theorem finiteCoproduct.ι_desc_apply {B : CompHausLike P} {π : (a : α) → X a ⟶ B} (a : α) : ∀ x, finiteCoproduct.desc X π (finiteCoproduct.ι X a x) = π a x := by intro x change (ι X a ≫ desc X π) _ = _ simp only [ι_desc] info: Mathlib/Topology/Category/CompHausLike/Limits.lean:113:0: [Elab.command] [0.012211] lemma finiteCoproduct.ι_desc_apply {B : CompHausLike P} {π : (a : α) → X a ⟶ B} (a : α) : ∀ x, finiteCoproduct.desc X π (finiteCoproduct.ι X a x) = π a x := by intro x change (ι X a ≫ desc X π) _ = _ simp only [ι_desc] info: Mathlib/Topology/Category/CompHausLike/Limits.lean:113:0: [Elab.async] [0.015416] elaborating proof of CompHausLike.finiteCoproduct.ι_desc_apply [Elab.definition.value] [0.014903] CompHausLike.finiteCoproduct.ι_desc_apply [Elab.step] [0.014576] intro x change (ι X a ≫ desc X π) _ = _ simp only [ι_desc] [Elab.step] [0.014564] intro x change (ι X a ≫ desc X π) _ = _ simp only [ι_desc] [Elab.step] [0.011699] change (ι X a ≫ desc X π) _ = _ Build completed successfully (985 jobs). ``` ### Trace profiling of `finiteCoproduct.ι_desc_apply` after PR 28574 ```diff diff --git a/Mathlib/Topology/Category/CompHausLike/Limits.lean b/Mathlib/Topology/Category/CompHausLike/Limits.lean index 493c277fec..b70ed614b6 100644 --- a/Mathlib/Topology/Category/CompHausLike/Limits.lean +++ b/Mathlib/Topology/Category/CompHausLike/Limits.lean @@ -109,11 +109,10 @@ lemma finiteCoproduct.ι_injective (a : α) : Function.Injective (finiteCoproduc lemma finiteCoproduct.ι_jointly_surjective (R : finiteCoproduct X) : ∃ (a : α) (r : X a), R = finiteCoproduct.ι X a r := ⟨R.fst, R.snd, rfl⟩ +set_option trace.profiler true in lemma finiteCoproduct.ι_desc_apply {B : CompHausLike P} {π : (a : α) → X a ⟶ B} (a : α) : ∀ x, finiteCoproduct.desc X π (finiteCoproduct.ι X a x) = π a x := by - intro x - change (ι X a ≫ desc X π) _ = _ - simp only [ι_desc] + tauto instance : HasCoproduct X where exists_colimit := ⟨finiteCoproduct.cofan X, finiteCoproduct.isColimit X⟩ diff --git a/Mathlib/Topology/Category/TopCat/Limits/Products.lean b/Mathlib/Topology/Category/TopCat/Limits/Products.lean index 0b74c2f6ee..353896fce8 100644 --- a/Mathlib/Topology/Category/TopCat/Limits/Products.lean +++ b/Mathlib/Topology/Category/TopCat/Limits/Products.lean @@ -62,9 +62,7 @@ theorem piIsoPi_inv_π_apply {ι : Type v} (α : ι → TopCat.{max v u}) (i : theorem piIsoPi_hom_apply {ι : Type v} (α : ι → TopCat.{max v u}) (i : ι) (x : (∏ᶜ α : TopCat.{max v u})) : (piIsoPi α).hom x i = (Pi.π α i :) x := by - have := piIsoPi_inv_π α i - rw [Iso.inv_comp_eq] at this - exact ConcreteCategory.congr_hom this x + tauto /-- The inclusion to the coproduct as a bundled continuous map. -/ abbrev sigmaι {ι : Type v} (α : ι → TopCat.{max v u}) (i : ι) : α i ⟶ TopCat.of (Σ i, α i) := by @@ -165,9 +163,7 @@ theorem prodIsoProd_hom_snd (X Y : TopCat.{u}) : theorem prodIsoProd_hom_apply {X Y : TopCat.{u}} (x : ↑(X ⨯ Y)) : (prodIsoProd X Y).hom x = ((Limits.prod.fst : X ⨯ Y ⟶ _) x, (Limits.prod.snd : X ⨯ Y ⟶ _) x) := by - ext - · exact ConcreteCategory.congr_hom (prodIsoProd_hom_fst X Y) x - · exact ConcreteCategory.congr_hom (prodIsoProd_hom_snd X Y) x + tauto @[reassoc (attr := simp), elementwise] theorem prodIsoProd_inv_fst (X Y : TopCat.{u}) : diff --git a/Mathlib/Topology/Category/TopCat/Limits/Pullbacks.lean b/Mathlib/Topology/Category/TopCat/Limits/Pullbacks.lean index 66049170b3..68b42db21b 100644 --- a/Mathlib/Topology/Category/TopCat/Limits/Pullbacks.lean +++ b/Mathlib/Topology/Category/TopCat/Limits/Pullbacks.lean @@ -110,9 +110,7 @@ theorem pullbackIsoProdSubtype_hom_apply {f : X ⟶ Z} {g : Y ⟶ Z} (pullbackIsoProdSubtype f g).hom x = ⟨⟨pullback.fst f g x, pullback.snd f g x⟩, by simpa using CategoryTheory.congr_fun pullback.condition x⟩ := by - apply Subtype.ext; apply Prod.ext - exacts [ConcreteCategory.congr_hom (pullbackIsoProdSubtype_hom_fst f g) x, - ConcreteCategory.congr_hom (pullbackIsoProdSubtype_hom_snd f g) x] + tauto theorem pullback_topology {X Y Z : TopCat.{u}} (f : X ⟶ Z) (g : Y ⟶ Z) : (pullback f g).str = ``` ``` ✔ [982/985] Built Mathlib.Topology.Category.TopCat.Limits.Products (2.7s) ✔ [983/985] Built Mathlib.Topology.Category.TopCat.Limits.Pullbacks (2.4s) ✔ [984/985] Built Mathlib.CategoryTheory.Extensive (4.3s) ℹ [985/985] Built Mathlib.Topology.Category.CompHausLike.Limits (3.0s) info: Mathlib/Topology/Category/CompHausLike/Limits.lean:113:0: [Elab.command] [0.033044] theorem ι_desc_apply {B : CompHausLike P} {π : (a : α) → X a ⟶ B} (a : α) : ∀ x, finiteCoproduct.desc X π (finiteCoproduct.ι X a x) = π a x := by tauto [Elab.definition.header] [0.031659] CompHausLike.finiteCoproduct.ι_desc_apply [Elab.step] [0.030394] expected type: Sort ?u.7530, term ∀ x, finiteCoproduct.desc X π (finiteCoproduct.ι X a x) = π a x [Elab.step] [0.030250] expected type: Sort ?u.7534, term finiteCoproduct.desc X π (finiteCoproduct.ι X a x) = π a x [Elab.step] [0.030242] expected type: Sort ?u.7534, term binrel% Eq✝ (finiteCoproduct.desc X π (finiteCoproduct.ι X a x)) (π a x) [Elab.step] [0.025815] expected type: , term finiteCoproduct.desc X π (finiteCoproduct.ι X a x) [Elab.step] [0.010204] expected type: (fun X ↦ ↑X.toTop) (finiteCoproduct X), term (finiteCoproduct.ι X a x) [Elab.step] [0.010186] expected type: (fun X ↦ ↑X.toTop) (finiteCoproduct X), term finiteCoproduct.ι X a x info: Mathlib/Topology/Category/CompHausLike/Limits.lean:113:0: [Elab.command] [0.033536] theorem finiteCoproduct.ι_desc_apply {B : CompHausLike P} {π : (a : α) → X a ⟶ B} (a : α) : ∀ x, finiteCoproduct.desc X π (finiteCoproduct.ι X a x) = π a x := by tauto info: Mathlib/Topology/Category/CompHausLike/Limits.lean:113:0: [Elab.command] [0.033652] lemma finiteCoproduct.ι_desc_apply {B : CompHausLike P} {π : (a : α) → X a ⟶ B} (a : α) : ∀ x, finiteCoproduct.desc X π (finiteCoproduct.ι X a x) = π a x := by tauto info: Mathlib/Topology/Category/CompHausLike/Limits.lean:113:0: [Elab.async] [0.025323] elaborating proof of CompHausLike.finiteCoproduct.ι_desc_apply [Elab.definition.value] [0.024806] CompHausLike.finiteCoproduct.ι_desc_apply [Elab.step] [0.024330] tauto [Elab.step] [0.024317] tauto [Elab.step] [0.024304] tauto Build completed successfully (985 jobs). ```
--- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/)
t-topology easy 4/15 Mathlib/Topology/Category/CompHausLike/Limits.lean,Mathlib/Topology/Category/TopCat/Limits/Products.lean,Mathlib/Topology/Category/TopCat/Limits/Pullbacks.lean 3 1 ['github-actions'] ADedecker
assignee:ADedecker
8-66218
8 days ago
8-66218
8 days ago
47-35672
47 days
28490 euprunin
author:euprunin
chore: golf entire `epi_of_cokernel_π_eq_zero`, `bottom_row_coprime`, `congr_of_eventuallyEq` and `Invertible.congr` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) easy 8/12 Mathlib/Algebra/Group/Invertible/Defs.lean,Mathlib/CategoryTheory/Abelian/Basic.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/Topology/ContinuousOn.lean 4 1 ['github-actions'] kex-y
assignee:kex-y
8-66185
8 days ago
8-66185
8 days ago
42-27953
42 days
28260 euprunin
author:euprunin
chore(Analysis/Fourier): golf entire `fourier_zero` and `fourier_zero'` using `simp` ---
Show trace profiling of fourier_zero ### Trace profiling of `fourier_zero` before PR 28260 ```diff diff --git a/Mathlib/Analysis/Fourier/AddCircle.lean b/Mathlib/Analysis/Fourier/AddCircle.lean index 6238f58476..99dbb05621 100644 --- a/Mathlib/Analysis/Fourier/AddCircle.lean +++ b/Mathlib/Analysis/Fourier/AddCircle.lean @@ -126,2 +126,3 @@ theorem fourier_coe_apply' {n : ℤ} {x : ℝ} : -- simp normal form is `fourier_zero'` +set_option trace.profiler true in theorem fourier_zero {x : AddCircle T} : fourier 0 x = 1 := by ``` ``` ℹ [2482/2482] Built Mathlib.Analysis.Fourier.AddCircle info: Mathlib/Analysis/Fourier/AddCircle.lean:128:0: [Elab.async] [0.066690] elaborating proof of fourier_zero [Elab.definition.value] [0.066228] fourier_zero [Elab.step] [0.065930] induction x using QuotientAddGroup.induction_on simp only [fourier_coe_apply] norm_num [Elab.step] [0.065922] induction x using QuotientAddGroup.induction_on simp only [fourier_coe_apply] norm_num [Elab.step] [0.055636] simp only [fourier_coe_apply] Build completed successfully. ``` ### Trace profiling of `fourier_zero` after PR 28260 ```diff diff --git a/Mathlib/Analysis/Fourier/AddCircle.lean b/Mathlib/Analysis/Fourier/AddCircle.lean index 6238f58476..0542519008 100644 --- a/Mathlib/Analysis/Fourier/AddCircle.lean +++ b/Mathlib/Analysis/Fourier/AddCircle.lean @@ -126,10 +126,8 @@ theorem fourier_coe_apply' {n : ℤ} {x : ℝ} : -- simp normal form is `fourier_zero'` +set_option trace.profiler true in theorem fourier_zero {x : AddCircle T} : fourier 0 x = 1 := by - induction x using QuotientAddGroup.induction_on - simp only [fourier_coe_apply] - norm_num + simp -theorem fourier_zero' {x : AddCircle T} : @toCircle T 0 = (1 : ℂ) := by - have : fourier 0 x = @toCircle T 0 := by rw [fourier_apply, zero_smul] - rw [← this]; exact fourier_zero +theorem fourier_zero' : @toCircle T 0 = (1 : ℂ) := by + simp ``` ``` ℹ [2482/2482] Built Mathlib.Analysis.Fourier.AddCircle info: Mathlib/Analysis/Fourier/AddCircle.lean:128:0: [Elab.async] [0.041217] elaborating proof of fourier_zero [Elab.definition.value] [0.040843] fourier_zero [Elab.step] [0.040316] simp [Elab.step] [0.040305] simp [Elab.step] [0.040291] simp [Meta.isDefEq] [0.013042] ✅️ 0 • ?m =?= 0 • x [Meta.isDefEq] [0.010734] ✅️ instHSMul =?= instHSMul [Meta.isDefEq.delta] [0.010705] ✅️ instHSMul =?= instHSMul [Meta.synthInstance] [0.010613] ✅️ SMulWithZero ℤ (AddCircle T) [Meta.synthInstance] [0.010175] ✅️ apply @AddGroup.intSMulWithZero to SMulWithZero ℤ (AddCircle T) [Meta.synthInstance.tryResolve] [0.010141] ✅️ SMulWithZero ℤ (AddCircle T) ≟ SMulWithZero ℤ (AddCircle T) [Meta.isDefEq] [0.010882] ❌️ ↑1 =?= ↑1 Build completed successfully. ```
---
Show trace profiling of fourier_zero' ### Trace profiling of `fourier_zero'` before PR 28260 ```diff diff --git a/Mathlib/Analysis/Fourier/AddCircle.lean b/Mathlib/Analysis/Fourier/AddCircle.lean index 6238f58476..c97c6382dd 100644 --- a/Mathlib/Analysis/Fourier/AddCircle.lean +++ b/Mathlib/Analysis/Fourier/AddCircle.lean @@ -131,2 +131,3 @@ theorem fourier_zero {x : AddCircle T} : fourier 0 x = 1 := by +set_option trace.profiler true in theorem fourier_zero' {x : AddCircle T} : @toCircle T 0 = (1 : ℂ) := by ``` ``` ℹ [2482/2482] Built Mathlib.Analysis.Fourier.AddCircle info: Mathlib/Analysis/Fourier/AddCircle.lean:133:0: [Elab.command] [0.040228] theorem fourier_zero' {x : AddCircle T} : @toCircle T 0 = (1 : ℂ) := by have : fourier 0 x = @toCircle T 0 := by rw [fourier_apply, zero_smul] rw [← this]; exact fourier_zero [Elab.definition.header] [0.039678] fourier_zero' [Elab.step] [0.039292] expected type: Sort ?u.10460, term @toCircle T 0 = (1 : ℂ) [Elab.step] [0.039281] expected type: Sort ?u.10460, term binrel% Eq✝ (@toCircle T 0) (1 : ℂ) [Meta.synthInstance] [0.023079] ❌️ CoeT ℂ x Circle info: Mathlib/Analysis/Fourier/AddCircle.lean:133:0: [Elab.async] [0.050645] elaborating proof of fourier_zero' [Elab.definition.value] [0.049639] fourier_zero' [Elab.step] [0.049079] have : fourier 0 x = @toCircle T 0 := by rw [fourier_apply, zero_smul] rw [← this]; exact fourier_zero [Elab.step] [0.049067] have : fourier 0 x = @toCircle T 0 := by rw [fourier_apply, zero_smul] rw [← this]; exact fourier_zero [Elab.step] [0.047714] have : fourier 0 x = @toCircle T 0 := by rw [fourier_apply, zero_smul] [Elab.step] [0.047690] focus refine no_implicit_lambda% (have : fourier 0 x = @toCircle T 0 := ?body✝; ?_) case body✝ => with_annotate_state"by" (rw [fourier_apply, zero_smul]) [Elab.step] [0.047680] refine no_implicit_lambda% (have : fourier 0 x = @toCircle T 0 := ?body✝; ?_) case body✝ => with_annotate_state"by" (rw [fourier_apply, zero_smul]) [Elab.step] [0.047675] refine no_implicit_lambda% (have : fourier 0 x = @toCircle T 0 := ?body✝; ?_) case body✝ => with_annotate_state"by" (rw [fourier_apply, zero_smul]) [Elab.step] [0.016566] refine no_implicit_lambda% (have : fourier 0 x = @toCircle T 0 := ?body✝; ?_) [Elab.step] [0.016520] expected type: ↑(toCircle 0) = 1, term no_implicit_lambda% (have : fourier 0 x = @toCircle T 0 := ?body✝; ?_) [Elab.step] [0.016512] expected type: ↑(toCircle 0) = 1, term (have : fourier 0 x = @toCircle T 0 := ?body✝; ?_) [Elab.step] [0.016502] expected type: ↑(toCircle 0) = 1, term have : fourier 0 x = @toCircle T 0 := ?body✝; ?_ [Elab.step] [0.016409] expected type: Sort ?u.12245, term fourier 0 x = @toCircle T 0 [Elab.step] [0.016398] expected type: Sort ?u.12245, term binrel% Eq✝ (fourier 0 x) (@toCircle T 0) [Elab.step] [0.031091] case body✝ => with_annotate_state"by" (rw [fourier_apply, zero_smul]) [Elab.step] [0.031024] with_annotate_state"by" (rw [fourier_apply, zero_smul]) [Elab.step] [0.031018] with_annotate_state"by" (rw [fourier_apply, zero_smul]) [Elab.step] [0.031012] with_annotate_state"by" (rw [fourier_apply, zero_smul]) [Elab.step] [0.031006] (rw [fourier_apply, zero_smul]) [Elab.step] [0.031000] rw [fourier_apply, zero_smul] [Elab.step] [0.030995] rw [fourier_apply, zero_smul] [Elab.step] [0.030987] rw [fourier_apply, zero_smul] [Elab.step] [0.030977] (rewrite [fourier_apply, zero_smul]; with_annotate_state"]" (try (with_reducible rfl))) [Elab.step] [0.030972] rewrite [fourier_apply, zero_smul]; with_annotate_state"]" (try (with_reducible rfl)) [Elab.step] [0.030964] rewrite [fourier_apply, zero_smul]; with_annotate_state"]" (try (with_reducible rfl)) [Elab.step] [0.026599] rewrite [fourier_apply, zero_smul] [Meta.isDefEq] [0.016855] ✅️ 0 • x =?= 0 • ?m [Meta.isDefEq] [0.015512] ✅️ instHSMul =?= instHSMul [Meta.isDefEq.delta] [0.015494] ✅️ instHSMul =?= instHSMul [Meta.synthInstance] [0.015404] ✅️ SMulWithZero ℤ (AddCircle T) [Meta.synthInstance] [0.014948] ✅️ apply @AddGroup.intSMulWithZero to SMulWithZero ℤ (AddCircle T) [Meta.synthInstance.tryResolve] [0.014922] ✅️ SMulWithZero ℤ (AddCircle T) ≟ SMulWithZero ℤ (AddCircle T) [Meta.isDefEq] [0.014466] ✅️ SMulWithZero ℤ (AddCircle T) =?= SMulWithZero ℤ ?m.13159 [Meta.synthInstance] [0.010847] ✅️ Zero (AddCircle T) Build completed successfully. ``` ### Trace profiling of `fourier_zero'` after PR 28260 ```diff diff --git a/Mathlib/Analysis/Fourier/AddCircle.lean b/Mathlib/Analysis/Fourier/AddCircle.lean index 6238f58476..f13a398896 100644 --- a/Mathlib/Analysis/Fourier/AddCircle.lean +++ b/Mathlib/Analysis/Fourier/AddCircle.lean @@ -127,9 +127,7 @@ theorem fourier_coe_apply' {n : ℤ} {x : ℝ} : theorem fourier_zero {x : AddCircle T} : fourier 0 x = 1 := by - induction x using QuotientAddGroup.induction_on - simp only [fourier_coe_apply] - norm_num + simp -theorem fourier_zero' {x : AddCircle T} : @toCircle T 0 = (1 : ℂ) := by - have : fourier 0 x = @toCircle T 0 := by rw [fourier_apply, zero_smul] - rw [← this]; exact fourier_zero +set_option trace.profiler true in +theorem fourier_zero' : @toCircle T 0 = (1 : ℂ) := by + simp ``` ``` ℹ [2482/2482] Built Mathlib.Analysis.Fourier.AddCircle info: Mathlib/Analysis/Fourier/AddCircle.lean:131:0: [Elab.command] [0.045555] theorem fourier_zero' : @toCircle T 0 = (1 : ℂ) := by simp [Elab.definition.header] [0.044962] fourier_zero' [Elab.step] [0.044931] expected type: Sort ?u.10311, term @toCircle T 0 = (1 : ℂ) [Elab.step] [0.044920] expected type: Sort ?u.10311, term binrel% Eq✝ (@toCircle T 0) (1 : ℂ) [Meta.synthInstance] [0.031268] ❌️ CoeT ℂ x Circle info: Mathlib/Analysis/Fourier/AddCircle.lean:131:0: [Elab.async] [0.027859] elaborating proof of fourier_zero' [Elab.definition.value] [0.027542] fourier_zero' [Elab.step] [0.027179] simp [Elab.step] [0.027169] simp [Elab.step] [0.027156] simp [Meta.isDefEq] [0.011252] ❌️ ↑1 =?= ↑1 [Meta.isDefEq.delta] [0.010804] ❌️ ↑1 =?= ↑1 [Meta.isDefEq] [0.010774] ❌️ 1 =?= 1 [Meta.isDefEq] [0.010717] ❌️ { x // 0 ≤ x } =?= Circle [Meta.isDefEq] [0.010706] ❌️ { x // 0 ≤ x } =?= ↥(Submonoid.unitSphere ℂ) [Meta.isDefEq] [0.010684] ❌️ fun x ↦ 0 ≤ x =?= fun x ↦ x ∈ Submonoid.unitSphere ℂ [Meta.isDefEq] [0.010675] ❌️ 0 ≤ x =?= x ∈ Submonoid.unitSphere ℂ Build completed successfully. ```
--- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/)
t-analysis easy delegated 3/6 Mathlib/Analysis/Fourier/AddCircle.lean 1 4 ['eric-wieser', 'euprunin', 'github-actions', 'mathlib-bors'] nobody
8-66156
8 days ago
8-66156
8 days ago
0-15279
4 hours
29947 JaafarTanoukhi
author:JaafarTanoukhi
feat(Combinatorics/Digraph): Maps Ported `SimpleGraph/Maps.lean` to `Digraph/Maps.lean` for future PRs related to issue #[26771](https://github.com/leanprover-community/mathlib4/issues/26771) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 476/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Maps.lean 2 1 ['github-actions'] nobody
8-64833
8 days ago
9-37936
9 days ago
9-37978
9 days
25883 pfaffelh
author:pfaffelh
feat: introduce Gram matrices A Gram matrix has entry `⟪v i, v j⟫` at `i j : n`, where `v : n → α` is an `InnerProductSpace 𝕜 α`. Give this notion and show that Gram matrices are positive semi-definite. This will be used later in order to show that the covariance matrix for Brownian Motion is positive semi-definite. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24575.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24575* migrated-from-branch new-contributor t-analysis delegated 142/2 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/GramMatrix.lean,Mathlib/MeasureTheory/Function/L2Space.lean 3 42 ['EtienneC30', 'eric-wieser', 'github-actions', 'mathlib-bors', 'pfaffelh', 'sgouezel'] hrmacbeth
assignee:hrmacbeth
8-63288
8 days ago
8-63288
8 days ago
78-69916
78 days
29965 RemyDegenne
author:RemyDegenne
feat(probability): define subtraction of kernels This PR defines subtraction of kernels and uses it to prove `MeasurableSet {a | κ a = η a}` for two finite kernels `κ, η`. From the LeanBandits project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability WIP 288/1 Mathlib.lean,Mathlib/MeasureTheory/Measure/Sub.lean,Mathlib/MeasureTheory/Measure/SubFinite.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/Probability/Kernel/RadonNikodym.lean,Mathlib/Probability/Kernel/Sub.lean 6 1 ['github-actions'] nobody
8-62730
8 days ago
8-65820
8 days ago
0-1
1 second
29855 eric-wieser
author:eric-wieser
chore(Data/Finset/Sort): lemmas about `0 : Fin _` and `Fin.last _` We already had these for `⟨0, ⋯⟩` and `⟨k - 1, ⋯⟩`. Moves: - `Finset.orderEmbOfFin_zero` -> `Finset.orderEmbOfFin_mk_zero` - `Finset.orderEmbOfFin_last` -> `Finset.orderEmbOfFin_mk_last` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data t-order easy delegated 17/7 Mathlib/Combinatorics/Enumerative/Composition.lean,Mathlib/Data/Finset/Sort.lean 2 4 ['eric-wieser', 'github-actions', 'mathlib-bors', 'ocfnash'] nobody
8-59806
8 days ago
8-59806
8 days ago
3-79002
3 days
27229 WilliamCoram
author:WilliamCoram
feat(GroupTheory/DoubleCoset): multiple lemmas From FLT --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory FLT new-contributor 97/0 Mathlib/GroupTheory/DoubleCoset.lean 1 16 ['Ruben-VandeVelde', 'WilliamCoram', 'github-actions', 'mathlib4-merge-conflict-bot'] mariainesdff
assignee:mariainesdff
8-59034
8 days ago
15-34679
15 days ago
74-14156
74 days
29798 Cyantain
author:Cyantain
feat(FieldTheory/IsIntegrallyClosed): lemma to judge whether an element is integral In this PR, we proved that an element is integral iff it's root of irreducible polynomial with unit leading coeff, which is an easy way to judge an element is integral or not, such as $\sqrt 5 / 4$, because it's root of $16x^2-5$ with not unit leading coeff, so it's not integral. new-contributor t-algebra delegated
label:t-algebra$
13/0 Mathlib/FieldTheory/Minpoly/IsIntegrallyClosed.lean 1 8 ['Ruben-VandeVelde', 'adomani', 'github-actions', 'kckennylau', 'mathlib-bors', 'riccardobrasca'] nobody
8-51852
8 days ago
8-51852
8 days ago
6-29891
6 days
28026 kim-em
author:kim-em
feat: grind annotations for `Disjoint` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author 90/50 Archive/Imo/Imo2001Q3.lean,Mathlib/Data/Set/Disjoint.lean,Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/Order/BoundedOrder/Lattice.lean,Mathlib/Order/CompleteLattice/MulticoequalizerDiagram.lean,Mathlib/Order/Disjoint.lean,Mathlib/Order/Lattice.lean 7 17 ['chrisflav', 'github-actions', 'grunweg', 'kim-em', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] alexjbest
assignee:alexjbest
8-43935
8 days ago
8-43935
8 days ago
48-60022
48 days
29933 smmercuri
author:smmercuri
chore: fix `def` naming isses in `Normed/Field/WithAbs.lean` --- - [x] depends on: #29932 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP 33/23 Mathlib/Analysis/Normed/Field/WithAbs.lean,Mathlib/NumberTheory/NumberField/AdeleRing.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Completion.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
8-39614
8 days ago
8-39614
8 days ago
1-17350
1 day
26259 Raph-DG
author:Raph-DG
feat(Topology): Connecting different notions of locally finite In this PR we connect the notions of local finiteness of an indexed family of sets (as in LocallyFinite) and of a set of sets (as in Function.locallyFinsuppWithin) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge t-topology 38/0 Mathlib/Topology/LocallyFinsupp.lean 1 18 ['Raph-DG', 'chrisflav', 'github-actions', 'jcommelin', 'kckennylau'] jcommelin
assignee:jcommelin
8-38676
8 days ago
8-63992
8 days ago
97-27982
97 days
29411 llllvvuu
author:llllvvuu
feat(LinearAlgebra/Matrix/Rank): rank factorization The rank factorization derived from `Module.finBasis`. Co-authored-by: Aristotle Harmonic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
20/0 Mathlib/LinearAlgebra/Matrix/Rank.lean,Mathlib/LinearAlgebra/Matrix/ToLin.lean 2 1 ['github-actions'] jcommelin
assignee:jcommelin
8-37708
8 days ago
26-20636
26 days ago
26-20631
26 days
29526 llllvvuu
author:llllvvuu
feat: `Multiset.map f` identifies `f` up to permutation Motivation: Reason about `Fintype`-indexed families via `Multiset` equality. Example use case 1: ```lean theorem Matrix.IsHermitian.cfc_eigenvalues {d : Type*} [Fintype d] [DecidableEq d] {M : Matrix d d 𝕜} (hM : M.IsHermitian) (f : ℝ → ℝ) (hcfc : Matrix.IsHermitian (cfc f M) := cfc_predicate f M) : ∃ (e : d ≃ d), hcfc.eigenvalues = f ∘ hM.eigenvalues ∘ e := by have := hcfc.roots_charpoly_eq_eigenvalues.symm rw [hM.charpoly_cfc_eq f, Polynomial.roots_prod] at this; swap · simp [Finset.prod_ne_zero_iff, Polynomial.X_sub_C_ne_zero] simp_rw [Polynomial.roots_X_sub_C, Multiset.bind_singleton] at this have he := (Multiset.compTriple_equivOfMapUnivEq this).comp_eq simp_rw [← Function.comp_def RCLike.ofReal, ← Function.comp_def f, Function.comp_assoc] at he exact ⟨_, RCLike.ofReal_injective.comp_left he.symm⟩ ``` Example use case 2 (on top of https://github.com/leanprover-community/mathlib4/pull/29610): ```lean theorem LinearMap.Eigenbasis.μ_equiv {ι ι' R G : Type*} [Fintype ι] [Fintype ι'] [CommRing R] [IsDomain R] [AddCommGroup G] [Module R G] [Module.Free R G] [Module.Finite R G] {f : Module.End R G} (B₁ : f.Eigenbasis ι) (B₂ : f.Eigenbasis ι') : ∃ e : ι ≃ ι', B₁.μ = B₂.μ ∘ e := by classical have := congr(Polynomial.roots $(B₁.charpoly_eq.symm.trans B₂.charpoly_eq)) rw [Polynomial.roots_prod, Polynomial.roots_prod] at this; rotate_left · simp [Finset.prod_ne_zero_iff, Polynomial.X_sub_C_ne_zero] · simp [Finset.prod_ne_zero_iff, Polynomial.X_sub_C_ne_zero] simp_rw [Polynomial.roots_X_sub_C, Multiset.bind_singleton] at this exact ⟨Multiset.equivOfMapUnivEq this, (Multiset.compTriple_equivOfMapUnivEq this).comp_eq.symm⟩ ``` Co-authored-by: Aristotle Harmonic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 35/0 Mathlib/Data/Multiset/Fintype.lean 1 8 ['Ruben-VandeVelde', 'github-actions', 'llllvvuu', 'vihdzp', 'wwylele'] nobody
8-37376
8 days ago
23-6406
23 days ago
23-6401
23 days
28219 joelriou
author:joelriou
feat(CategoryTheory): monomorphisms in Type are stable under transfinite compositions --- - [x] depends on: #26030 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 71/0 Mathlib.lean,Mathlib/CategoryTheory/Limits/Types/Shapes.lean,Mathlib/CategoryTheory/Types/Monomorphisms.lean 3 7 ['dagurtomas', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] TwoFX
assignee:TwoFX
8-17257
8 days ago
8-17257
8 days ago
27-18061
27 days
29275 wwylele
author:wwylele
feat(GroupTheory): add DivisibleHull This is part of Hahn embedding theorem #27268, where an a ordered group is first embedded in a divisible group / Q-module. I am aware at #25662 there is also an ongoing rewrite of `LocalizedModule` that this PR uses. Hopefully I avoided interfering it by using mostly with public API. --- - [x] depends on: #29277 - [x] depends on: #29388 - [x] depends on: #29386 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory maintainer-merge 451/3 Mathlib.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/PNat.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Pow.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/GroupTheory/DivisibleHull.lean 6 106 ['YaelDillies', 'github-actions', 'mathlib4-dependent-issues-bot', 'vihdzp', 'wwylele'] tb65536
assignee:tb65536
8-7999
8 days ago
15-33876
15 days ago
25-11078
25 days
29488 Timeroot
author:Timeroot
feat: 'said' tactic Functionally similar to `says`, but explicitly not for checking output or even saying there ever was output. `X said Y` just means that `X` was part of the process for (a human, or machine, or both) to generate `Y`. Based on this [#mathlib4 > noisy simp says in CI @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/noisy.20simp.20says.20in.20CI/near/538443152) Zulip discussion --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 40/0 Mathlib/Tactic/Linter/UnusedTactic.lean,Mathlib/Tactic/Linter/UnusedTacticExtension.lean,Mathlib/Tactic/Says.lean,MathlibTest/says.lean 4 3 ['JovanGerb', 'MichaelStollBayreuth', 'github-actions'] JovanGerb
assignee:JovanGerb
8-7998
8 days ago
15-66372
15 days ago
23-85921
23 days
29765 YaelDillies
author:YaelDillies
feat: commutative monoids are internal monoids From Toric --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) toric t-category-theory 76/6 Mathlib/CategoryTheory/Monoidal/Cartesian/Grp_.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Mon_.lean 2 3 ['YaelDillies', 'eric-wieser', 'github-actions'] kim-em
assignee:kim-em
8-7994
8 days ago
15-70957
15 days ago
15-70992
15 days
29769 Vierkantor
author:Vierkantor
CI: run a weekly linter workflow This PR adds a workflow analogous to the nightly regression lints, that reports possible refactors using the tactic analysis framework. Those would be too noisy or take too much time to run in regular CI. As a first linter, we have the `mergeWithGrind` linter that reports when a sequence of tactics followed by `grind` can become just `grind`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 102/1 .github/workflows/weekly-lints.yml,Mathlib/Init.lean 2 1 ['github-actions'] bryangingechen
assignee:bryangingechen
8-7993
8 days ago
15-58902
15 days ago
15-58881
15 days
29771 Vierkantor
author:Vierkantor
refactor(TacticAnalysis): use full CommandElabM context in test Running the `rwMerge` linter on the whole of Mathlib reveals that the tactic analysis framework did not always correctly pass the environment to the test step of a pass. By running the test in a full `CommandElabM` and adding a `ContextInfo` and `TacticInfo`, we can access the right environment (using the `ctxI.runTacticCode` function). There are still a few subtle issues to do with notation but I would like to get this fix in first, since it involves some larger refactors. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 44/17 Mathlib/Tactic/TacticAnalysis.lean,Mathlib/Tactic/TacticAnalysis/Declarations.lean,MathlibTest/TacticAnalysis.lean 3 7 ['adomani', 'bryangingechen', 'github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] kim-em
assignee:kim-em
8-7992
8 days ago
15-41918
15 days ago
15-58448
15 days
29990 pechersky
author:pechersky
feat(Algebra/Subgroup/Lattice): `mem_biSup_of_directedOn` Generalization of existing `mem_iSup_of_directed` On the way to characterization of the torsion subgroup as the sup over all subgroups of roots of unity --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order t-algebra
label:t-algebra$
35/10 Mathlib/Algebra/Group/Subgroup/Lattice.lean 1 1 ['github-actions'] nobody
7-80279
7 days ago
7-80333
7 days ago
7-80322
7 days
29471 harahu
author:harahu
doc: use en dash instead of hyphen in Akra-Bazzi When joining two names, like is done here, the en dash is usually preferred over a regular hyphen. This also aligns the naming in mathlib with that of [Wikipedia](https://en.wikipedia.org/wiki/Akra%E2%80%93Bazzi_method). Some concern was raised [on Zulip](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.23.2029464.20corrections.20to.20docs.20by.20way.20of.20LLM/near/538466767) regarding what this implies for code searches using `grep` and similar tools. Consequently, tags have been added to make sure searches using the regular hyphen will still hit the relevant files. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability 28/21 Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Computability/AkraBazzi/GrowsPolynomially.lean,Mathlib/Computability/AkraBazzi/SumTransform.lean 3 6 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
7-74281
7 days ago
7-74306
7 days ago
24-3845
24 days
29464 harahu
author:harahu
doc(AkraBazzi): corrections to docs by way of LLM Changes are due to Junie Pro and Codex, both ChatGPT-based agents, hence warrants somewhat careful review. I've tried to review these changes myself, but my limited lean experience is felt as a limiting factor. Changes include: - Fixing typos, spelling and grammar - Changing some docstring code to LaTex math, where that seemed to be the intention - Move some descriptions between files, in cases where definitions were promised in files they weren't defined - Fix inconsistencies between docstrings and code (these need special review attention) [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.23.2029464.20corrections.20to.20docs.20by.20way.20of.20LLM/with/538427193) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability awaiting-author 66/60 Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Computability/AkraBazzi/GrowsPolynomially.lean,Mathlib/Computability/AkraBazzi/SumTransform.lean 3 26 ['chrisflav', 'github-actions', 'grunweg', 'harahu', 'mathlib4-merge-conflict-bot'] nobody
7-73983
7 days ago
7-74012
7 days ago
0-6688
1 hour
28728 or4nge19
author:or4nge19
feat(PerronFrobenius): introduce Irreducible and Primitive Matrices and relations to Quiver This PR develops a graph-theoretic interface for studying nonnegative square matrices over `ℝ` through the quiver formed by their strictly positive entries. It shows the equivalence between positivity of suitable matrix powers and existence of directed paths in this quiver. ------------ - [ ] depends on: #28696 - [ ] depends on:#29754 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-author 289/0 Mathlib.lean,Mathlib/Combinatorics/Quiver/Path/StronglyConnected.lean,Mathlib/LinearAlgebra/Matrix/Irreducible/Defs.lean 3 6 ['github-actions', 'j-loreaux', 'mathlib4-dependent-issues-bot', 'or4nge19'] nobody
7-65014
7 days ago
20-29974
20 days ago
0-32474
9 hours
27973 smmercuri
author:smmercuri
feat: the ring of integers of a `ℤₘ₀`-valued field is compact whenever it is a DVR and the residue field is finite This PR continues the work from #21844. Original PR: https://github.com/leanprover-community/mathlib4/pull/21844 large-import t-algebra awaiting-author
label:t-algebra$
54/2 Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/Topology/Algebra/Valued/WithZeroMulInt.lean 2 8 ['github-actions', 'pechersky', 'smmercuri'] dagurtomas
assignee:dagurtomas
7-64551
7 days ago
7-80785
7 days ago
44-43929
44 days
29556 joelriou
author:joelriou
feat(CategoryTheory): canonical colimits Given a functor `F : C ⥤ D` and `Y : D`, we say that `Y` is a canonical colimit relatively to `F` is `Y` identifies to the colimit of all `F.obj X` for `X : C` and `f : F.obj X ⟶ Y`, i.e. `Y` identifies to the colimit of the obvious functor `CostructuredArrow F Y ⥤ D` (see definitions `canonicalCocone` and `CanonicalColimit`). We introduce the corresponding property `isCanonicalColimit F` of objects of `D`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 72/0 Mathlib.lean,Mathlib/CategoryTheory/Limits/Canonical.lean 2 2 ['github-actions', 'joelriou'] joneugster
assignee:joneugster
7-64434
7 days ago
22-55175
22 days ago
22-55153
22 days
29995 vihdzp
author:vihdzp
feat: more lemmas on `Concept` These are used in the [`combinatorial-games`](https://github.com/vihdzp/combinatorial-games) repository. Note that `Concept α α (· ≤ ·)` is the Dedekind-McNeille completion, while `Concept α α (· < ·)` is a modified form of it that's used to define surreal cuts. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 40/0 Mathlib/Order/Concept.lean 1 10 ['github-actions', 'linesthatinterlace', 'vihdzp'] nobody
7-63642
7 days ago
7-68579
7 days ago
7-68616
7 days
28944 linesthatinterlace
author:linesthatinterlace
refactor(Order/Hom/Basic): reorder definitions Reorder and disentangle definitions for OrderHom, OrderEmbedding and OrderIso. --- This is a preamble to making all of these `def` and consistently defined - the aim is to first disentangle the definitions as it will make it more straightforward to perform these later PRs. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 216/184 Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Hom/Order.lean 2 9 ['YaelDillies', 'github-actions', 'linesthatinterlace', 'mathlib4-merge-conflict-bot'] YaelDillies, b-mehta, linesthatinterlace
assignee:YaelDillies assignee:b-mehta assignee:linesthatinterlace
7-44596
7 days ago
9-42335
9 days ago
24-70335
24 days
29687 vihdzp
author:vihdzp
feat: standard part of ratio in non-Archimedean field We define `ArchimedeanClass.standardPart x` as the unique real number with an infinitesimal difference from `x`. This generalizes `Hyperreal.st` for a general (non-)archimedean field. --- - [x] #29611 - [x] #29685 - [ ] #29735 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 457/1 Mathlib.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Ring/Archimedean.lean,Mathlib/Data/Real/CompleteField.lean,Mathlib/Data/Real/StandardPart.lean,Mathlib/Order/Quotient.lean 6 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
7-41195
7 days ago
7-41218
7 days ago
0-0
0 seconds
23920 YaelDillies
author:YaelDillies
feat: relation-separated sets Define a notion of separation of a set relative to a relation. This will be used to unify metric and dynamical separation. From MiscYD and LeanAPAP --- - [x] depends on: #26988 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 66/0 Mathlib.lean,Mathlib/Data/Rel/Separated.lean 2 21 ['ADedecker', 'D-Thomine', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] ADedecker
assignee:ADedecker
7-39690
7 days ago
7-39712
7 days ago
38-17242
38 days
29354 themathqueen
author:themathqueen
refactor(Algebra/Algebra/Equiv): allow for non-unital `AlgEquiv` This refactors `AlgEquiv` to allow for non-unital algebras. More specifically, we weaken the type class assumptions from: ```lean structure AlgEquiv (R A B : Type*) [CommSemiring R] [Semiring A] [Semiring B] [Algebra R A] [Algebra R B] ``` to ```lean structure AlgEquiv (R A B : Type*) [Add A] [Add B] [Mul A] [Mul B] [SMul R A] [SMul R B] ``` Instead of a `commutes'` field, we now have a `map_smul'` field. We also include a definition `AlgEquiv.ofCommutes` which takes in a `RingEquiv` and a `commutes'` field to match before and for convenience. `StarAlgEquiv` now extends `AlgEquiv`. We also generalize a few files to allow for non-unital. I suspect there are a few more things to generalize, but will leave this for later. Co-authored-by: Jireh Loreaux --- Revives #8686. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
527/484 Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Opposite.lean,Mathlib/Algebra/Algebra/Pi.lean,Mathlib/Algebra/Algebra/Prod.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/MulOpposite.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Algebra/TransferInstance.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/CommAlgCat/Basic.lean,Mathlib/Algebra/Category/CommAlgCat/FiniteType.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/DualQuaternion.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/ToDirectSum.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Rename.lean,Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Polynomial/Taylor.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Star/Free.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/GelfandFormula.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/UnitizationL1.lean,Mathlib/Analysis/Normed/Lp/LpEquiv.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Data/Matrix/Basic.lean,Mathlib/Data/Matrix/Composition.lean,Mathlib/Data/Matrix/DualNumber.lean,Mathlib/FieldTheory/Fixed.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/Galois/Profinite.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Basic.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/FieldTheory/Normal/Basic.lean,Mathlib/FieldTheory/PrimitiveElement.lean,Mathlib/FieldTheory/RatFunc/Basic.lean,Mathlib/FieldTheory/Separable.lean,Mathlib/LinearAlgebra/CliffordAlgebra/BaseChange.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Conjugation.lean,Mathlib/LinearAlgebra/Complex/Module.lean,Mathlib/LinearAlgebra/Matrix/Basis.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Coeff.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/LinearMap.lean,Mathlib/LinearAlgebra/Matrix/Reindex.lean,Mathlib/LinearAlgebra/Matrix/ToLin.lean,Mathlib/LinearAlgebra/Matrix/Unique.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/Internal.lean,Mathlib/LinearAlgebra/TensorProduct/Subalgebra.lean,Mathlib/NumberTheory/NumberField/Discriminant/Defs.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Bialgebra/Equiv.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/Etale/Field.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/Flat/Equalizer.lean,Mathlib/RingTheory/FractionalIdeal/Operations.lean,Mathlib/RingTheory/Frobenius.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/HahnSeries/PowerSeries.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/IntegralClosure/IntegrallyClosed.lean,Mathlib/RingTheory/Invariant/Basic.lean,Mathlib/RingTheory/Invariant/Profinite.lean,Mathlib/RingTheory/IsTensorProduct.lean,Mathlib/RingTheory/Jacobson/Artinian.lean,Mathlib/RingTheory/Jacobson/Ring.lean,Mathlib/RingTheory/Kaehler/Basic.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/FractionRing.lean,Mathlib/RingTheory/MatrixAlgebra.lean,Mathlib/RingTheory/MvPolynomial/Localization.lean,Mathlib/RingTheory/Norm/Basic.lean,Mathlib/RingTheory/Polynomial/Quotient.lean,Mathlib/RingTheory/PolynomialAlgebra.lean,Mathlib/RingTheory/PowerSeries/WeierstrassPreparation.lean,Mathlib/RingTheory/RingHom/FiniteType.lean,Mathlib/RingTheory/SimpleModule/Isotypic.lean,Mathlib/RingTheory/Smooth/Basic.lean,Mathlib/RingTheory/Smooth/Pi.lean,Mathlib/RingTheory/Spectrum/Prime/Polynomial.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean,Mathlib/RingTheory/TensorProduct/Pi.lean,Mathlib/RingTheory/TensorProduct/Quotient.lean,Mathlib/RingTheory/Trace/Basic.lean,Mathlib/RingTheory/Unramified/Field.lean,Mathlib/Topology/Algebra/Algebra/Equiv.lean,Mathlib/Topology/Algebra/Module/FiniteDimension.lean,Mathlib/Topology/LocallyConstant/Algebra.lean 96 25 ['fpvandoorn', 'github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot', 'themathqueen'] joelriou
assignee:joelriou
7-35776
7 days ago
7-38397
7 days ago
21-9774
21 days
26338 mans0954
author:mans0954
feat(Order/ScottContinuity): Scott continuity on product spaces Some further results on Scott Continuity: - `scottContinuous_iff_map_sSup`: `f` is Scott continuous if and only if it commutes with `sSup` on directed sets - `ScottContinuous_prod_of_ScottContinuous`: `f` is Scott continuous on a product space if it is Scott continuous in each variable - `ScottContinuousOn.inf₂`: For complete linear orders, the meet operation is Scott continuous --- - [x] depends on: #13201 - I think this is due to the move of the definition of Scott Continuity into its own file rather than a hard dependency. - [x] depends on: #19150 - [x] depends on: #19222 - [x] depends on:#20254 - [x] depends on: #21493 Original PR: https://github.com/leanprover-community/mathlib4/pull/15412 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author 132/4 Mathlib.lean,Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/ScottContinuity.lean,Mathlib/Order/ScottContinuity/Complete.lean,Mathlib/Order/ScottContinuity/Prod.lean 5 n/a ['YaelDillies', 'github-actions', 'mans0954', 'mathlib4-dependent-issues-bot'] nobody
7-28332
7 days ago
unknown
unknown
29241 yoh-tanimoto
author:yoh-tanimoto
feat(Analysis/InnerProductSpace/Orthogonal): add duplicates for `ClosedSubmodule` add duplicates of definitions and API's for `ClosedSubmodule` in an `InnerProductSpace`. motivation: when one considers a Hilbert space (`CompleteSpace`), it is more natural to consider `ClosedSubmodule`s. They form a complete lattice and satisfy `sup_orthogonal` #29243. - [x] depends on: #29230 for `Lattice` `CompleteLattice` awaiting-author 191/0 Mathlib/Analysis/InnerProductSpace/Orthogonal.lean 1 7 ['github-actions', 'mathlib4-dependent-issues-bot', 'sgouezel', 'yoh-tanimoto'] sgouezel
assignee:sgouezel
7-27991
7 days ago
8-50099
8 days ago
12-74361
12 days
29110 NotWearingPants
author:NotWearingPants
feat(Counterexamples): Euler's sum of powers conjecture feat(Counterexamples): Euler's sum of powers conjecture --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip maintainer-merge new-contributor 158/0 Counterexamples.lean,Counterexamples/EulerSumOfPowers.lean 2 43 ['MichaelStollBayreuth', 'NotWearingPants', 'eric-wieser', 'github-actions', 'tb65536', 'urkud'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
7-26967
7 days ago
7-27023
7 days ago
24-25032
24 days
29164 vlad902
author:vlad902
feat(SimpleGraph): Hall's Marriage Theorem for bipartite graphs Derive the graph theoretic proof of Hall's marriage theorem from the combinatorial version. Note that I specifically implement this for the more general case of infinite graphs that are locally finite (e.g. every vertex has only finite neighbors.) As a result, the theorem depends on some category theoretic infrastructure required for the infinite combinatorial formulation of Hall's Marriage Theorem and hence I've placed the theorems into their own file to avoid requiring it in `Matching.lean` - [ ] depends on: #29162 t-combinatorics 128/7 Mathlib.lean,Mathlib/Combinatorics/Hall/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Hall.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean,docs/1000.yaml 5 2 ['github-actions', 'mathlib4-dependent-issues-bot'] b-mehta
assignee:b-mehta
7-8008
7 days ago
19-83408
19 days ago
20-234
20 days
29328 vlad902
author:vlad902
feat(SimpleGraph): graph isomorphism preserves `IsAcyclic`/`IsTree` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 21/2 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 2 ['github-actions', 'themathqueen'] b-mehta
assignee:b-mehta
7-8007
7 days ago
30-26427
1 month ago
30-26449
30 days
29823 themathqueen
author:themathqueen
feat(Algebra/Group/Submonoid): add `(Add)Submonoid.closure_pi` This generalizes and moves some proofs from subgroups to submonoids in order to add `(Add)Submonoid.closure_pi`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
86/45 Mathlib.lean,Mathlib/Algebra/Group/Subgroup/Finite.lean,Mathlib/Algebra/Group/Submonoid/Finite.lean 3 6 ['eric-wieser', 'github-actions', 'themathqueen'] dagurtomas
assignee:dagurtomas
7-8001
7 days ago
14-18405
14 days ago
14-18447
14 days
29996 vihdzp
author:vihdzp
chore(Order/Concept): `IsIntent` and `IsExtent` We define predicates for a set to be an intent/extent, and use them to define alternate constructors for a concept. Using these, we golf the complete lattice instances. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 161/95 Mathlib/Order/Concept.lean 1 17 ['github-actions', 'linesthatinterlace', 'plp127', 'vihdzp'] nobody
6-83047
6 days ago
7-68509
7 days ago
7-68545
7 days
26138 xroblot
author:xroblot
Development branch (2) --- WIP 0/0 Mathlib/Sandbox.lean 1 n/a ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
6-69363
6 days ago
unknown
unknown
30026 ADedecker
author:ADedecker
chore: new file for constructions of uniform groups The split between `Defs` and `Basic` was a bit messy (e.g the `Prod` instance was in `Defs` but the `Pi` instance was in `Basic`), and I'm going to make these files longer when introducing left and right uniform groups, so I figured the best solution was to move everything in an intermediate `Constructions` file. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 112/94 Mathlib.lean,Mathlib/Analysis/CStarAlgebra/Module/Synonym.lean,Mathlib/RingTheory/MvPowerSeries/PiTopology.lean,Mathlib/Topology/Algebra/IsUniformGroup/Basic.lean,Mathlib/Topology/Algebra/IsUniformGroup/Constructions.lean,Mathlib/Topology/Algebra/IsUniformGroup/Defs.lean,Mathlib/Topology/Instances/TrivSqZeroExt.lean,Mathlib/Topology/UniformSpace/Matrix.lean 8 1 ['github-actions'] nobody
6-48856
6 days ago
6-48856
6 days ago
6-48836
6 days
29513 grunweg
author:grunweg
fix(lint-style): parse linter options and load environment extensions correctly Parse options and load linter set extension correctly. This fixes two issues: - We never called the `toOptions` function that parses Lakefile options into a `Lean.Options` structure: the function we use instead is only meant for command-line options and doesn't handle the `weak.` prefix correctly. - The way we load linter sets was incorrect: `withImportModules` stopped updating environment extensions since [lean4#6325](https://github.com/leanprover/lean4/pull/6325), and that is exactly what we use to store linter sets. At the time of writing, `importModules` might be a suitable replacement (but this is not very safe, and not documented to be stable). Instead, write a small elaborator returning the environment at the point of elaboration, and use that instead. --- - [x] depends on: #29584 - [x] depends on: #29585 - [x] depends on: #29586 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge t-meta 28/12 scripts/lint-style.lean 1 13 ['Vierkantor', 'adomani', 'github-actions', 'grunweg', 'mathlib4-dependent-issues-bot'] nobody
6-48651
6 days ago
6-61968
6 days ago
15-48370
15 days
24754 urkud
author:urkud
feat: define `pathIntegral` This is a step towards formalizing of the Poincaré lemma for 1-forms. --- - [x] depends on: #24831 - [x] depends on: #25047 - [x] depends on: #25048 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-analysis awaiting-author 580/9 Mathlib.lean,Mathlib/Analysis/Convex/PathConnected.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/ContDiff.lean,Mathlib/MeasureTheory/Integral/PathIntegral/Basic.lean 6 42 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel', 'urkud'] j-loreaux
assignee:j-loreaux
6-31548
6 days ago
6-31548
6 days ago
17-56980
17 days
30032 riccardobrasca
author:riccardobrasca
feat: factorization of cyclotomic polynomial over finite fields We compute the degree of the factors of the `n`-th cyclotomic polynomial over a finite field of characteristic `p` when `p` and `n` are coprime. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-number-theory
label:t-algebra$
184/3 Mathlib.lean,Mathlib/Algebra/CharP/CharAndCard.lean,Mathlib/NumberTheory/GaussSum.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Basic.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Factorization.lean 5 1 ['github-actions'] nobody
6-23983
6 days ago
6-23990
6 days ago
6-39903
6 days
30038 JovanGerb
author:JovanGerb
feat(push): `@[push]` annotations for `fun` This PR adds the annotations for the tactics `push fun _ ↦ _` and `pull fun _ ↦ _` and the simprocs `pushFun` and `pullFun`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 28/6 Mathlib/Algebra/Notation/Pi/Defs.lean,Mathlib/Data/Nat/Cast/Basic.lean,Mathlib/Order/Lattice.lean,MathlibTest/push.lean 4 1 ['github-actions'] nobody
6-11950
6 days ago
6-12018
6 days ago
6-11997
6 days
29538 YaelDillies
author:YaelDillies
refactor(FractionalIdeal): use algebraic order theory API Instantiate instances earlier and use generic lemmas instead of the `FractionalIdeal`-specific ones. Also rename `_nonzero` in lemma names to `_ne_zero`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 158/176 Mathlib/NumberTheory/NumberField/CanonicalEmbedding/Basic.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/DedekindDomain/Factorization.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Basic.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/FractionalIdeal/Basic.lean,Mathlib/RingTheory/FractionalIdeal/Inverse.lean,Mathlib/RingTheory/FractionalIdeal/Operations.lean 8 1 ['github-actions'] chrisflav
assignee:chrisflav
6-7987
6 days ago
19-50097
19 days ago
19-50083
19 days
29693 kckennylau
author:kckennylau
feat(RingTheory): make Euclidean domain from DVR --- Zulip: https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Leading.20term.20of.20valuation/near/539666529 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory maintainer-merge 82/0 Mathlib/RingTheory/DiscreteValuationRing/Basic.lean 1 6 ['github-actions', 'kckennylau', 'pechersky'] chrisflav
assignee:chrisflav
6-7986
6 days ago
17-48607
17 days ago
18-8110
18 days
29791 llllvvuu
author:llllvvuu
feat(Order): lemmas about `iSupIndep` * generalize `Finset.SupIndep` "bind" operations from `DistribLattice` to `IsModularLattice` * new lemma `iSupIndep.iInf` * more characterizations of `iSupIndep` on submodules: * `iSupIndep_iff_finset_sum_eq_zero_imp_eq_zero` * `iSupIndep_iff_finset_sum_eq_imp_eq` * add `@[simp]` and `@[grind]` attributes which were helpful for these proofs Original motivation was to have the following fact: ```lean theorem iSupIndep_iInf_genEigenspace [NoZeroSMulDivisors R M] {α : Type*} (f : α → End R M) (k : ℕ∞) : iSupIndep fun μ : α → R ↦ ⨅ a : α, ((f a).genEigenspace (μ a)) k := .iInf (f · |>.genEigenspace · k) (f · |>.independent_genEigenspace k) ``` Co-authored-by: Aristotle Harmonic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 166/62 Mathlib/Data/Finset/Disjoint.lean,Mathlib/Data/Finset/Lattice/Fold.lean,Mathlib/Data/Finset/Lattice/Union.lean,Mathlib/Data/Finset/Sigma.lean,Mathlib/GroupTheory/Perm/Cycle/Factors.lean,Mathlib/LinearAlgebra/DFinsupp.lean,Mathlib/LinearAlgebra/Eigenspace/Basic.lean,Mathlib/Logic/Embedding/Basic.lean,Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/Order/Partition/Finpartition.lean,Mathlib/Order/SupIndep.lean 11 12 ['github-actions', 'leanprover-bot', 'llllvvuu'] bryangingechen
assignee:bryangingechen
6-7986
6 days ago
14-4575
14 days ago
14-28196
14 days
24019 urkud
author:urkud
feat(Analysis): Poincaré lemma for 1-forms --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 984/22 Mathlib.lean,Mathlib/Analysis/Calculus/Poincare/OneForm.lean,Mathlib/Analysis/Calculus/TangentCone.lean,Mathlib/Analysis/Convex/PathConnected.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/MeasureTheory/Integral/DivergenceTheorem.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/ContDiff.lean,Mathlib/MeasureTheory/Integral/PathIntegral/Basic.lean,Mathlib/Topology/Homotopy/Path.lean,Mathlib/Topology/UnitInterval.lean 11 4 ['github-actions', 'leanprover-community-bot-assistant'] nobody
6-7830
6 days ago
17-43056
17 days ago
0-0
0 seconds
10235 urkud
author:urkud
feat: add `Decidable`, `Fintype`, `Encodable` linters This PR ports the `decidableClassical`, `fintypeFinite` and `encodableCountable` linters from mathlib3: all three are environment linters which flag declarations that have a hypothesis `[Decidable p]` etc., but do not use the underlying assumption in this type. Restructuring the code can make the statement more general. The implementation is in fact quite general, and can easily adapt to include further types. PRs #17518 and #17519 are two examples of further such linters. --- Please don't fix the failures related to `HasFDerivWithinAt.pi`. Finiteness assumptions in these lemmas will be completely removed during porting to TVS. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-bench large-import t-linter t-meta awaiting-author 123/4 Mathlib.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/TuringMachine.lean,Mathlib/Data/Fintype/Quotient.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/NumberTheory/JacobiSum/Basic.lean,Mathlib/Order/Heyting/Regular.lean,Mathlib/Tactic.lean,Mathlib/Tactic/GeneralizeProofs.lean,Mathlib/Tactic/Linter/UnusedAssumptionInType.lean 11 n/a ['Command-Master', 'github-actions', 'grunweg', 'kmill', 'leanprover-bot', 'urkud'] nobody
6-7311
6 days ago
unknown
unknown
29512 grunweg
author:grunweg
feat: check for PR titles which do not start with "feat" etc. We ignore draft PRs and PRs with the WIP label. The set of checks is intentionally kept small, and could be expanded in the future. --- More basic version of #16303: given that mathlib's statistics will use the PR kind, let's make sure PR kinds are somewhat appropriate. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 365/0 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/ValidatePRTitle.lean,lakefile.lean,scripts/README.md,scripts/check_title_labels.lean 10 17 ['bryangingechen', 'eric-wieser', 'github-actions', 'grunweg'] bryangingechen
assignee:bryangingechen
5-75923
5 days ago
23-38358
23 days ago
23-38336
23 days
29622 uniwuni
author:uniwuni
feat(RepresentationTheory/Commutative): simple representations of commutative monoids are 1-dimensional Shows that for a commutative monoid, the simple finite dimensional representations over algebraically closed fields are all 1-dimensional. --- Some things in here I am a bit uncomfortable with. `FDRep` seems to be not particularly fleshed out yet, so I had to explicitly construct embeddings and so on instead of using `Rep.subrepresentation`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
101/2 Mathlib.lean,Mathlib/RepresentationTheory/Commutative.lean,Mathlib/RepresentationTheory/FDRep.lean,docs/undergrad.yaml 4 13 ['github-actions', 'riccardobrasca', 'uniwuni'] riccardobrasca
assignee:riccardobrasca
5-70570
5 days ago
5-70570
5 days ago
14-46245
14 days
29449 mitchell-horner
author:mitchell-horner
feat(Combinatorics/SimpleGraph): add Turán density related theorems Refactors `tendsto_turanDensity` and implements `turanDensity_eq_sInf` and `isContained_of_card_edgeFinset` (theorems that are common in proofs involving Turán density). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 52/14 Mathlib/Combinatorics/SimpleGraph/Extremal/TuranDensity.lean 1 1 ['github-actions'] nobody
5-64670
5 days ago
25-17751
25 days ago
25-17792
25 days
28719 mitchell-horner
author:mitchell-horner
refactor: redefine `IsTuranMaximal` Redefined `IsTuranMaximal := G.IsExtremal (CliqueFree · (r + 1))` and - replaced `classical` in `IsTuranMaximal.le_iff_eq` with `DecidableRel` - refactored `turanGraph.instDecidableRelAdj`, `turanGraph_zero`, `exists_isTuranMaximal` - added `open Fintype` - replaced `simp only` with `rw` or `simp_rw` --- - [x] depends on: #28721 - [x] depends on: #29054 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 33/46 Mathlib/Combinatorics/SimpleGraph/Extremal/Turan.lean 1 8 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'mitchell-horner', 'vihdzp'] kmill
assignee:kmill
5-64668
5 days ago
5-67999
5 days ago
33-723
33 days
27599 mitchell-horner
author:mitchell-horner
feat(Combinatorics/SimpleGraph): define `CompleteEquipartiteSubgraph` Define the complete equipartite subgraphs in `r` parts each of size `t` in `G` as the `r` subsets of vertices each of size `t` such that vertices in distinct subsets are adjacent. In this case `Nonempty (G.CompleteEquipartiteSubgraph r t)` is equivalent to `completeEquipartiteGraph r t ⊑ G`, that is, finding `r` subsets of vertices each of size `t` in `G` such that vertices in distinct subsets are adjacent is equivalent to finding an injective homomorphism from `completeEquipartiteGraph r t` to `G`. --- - [x] depends on: #27597 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 113/7 Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean 1 19 ['YaelDillies', 'b-mehta', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'mitchell-horner'] YaelDillies
assignee:YaelDillies
5-64656
5 days ago
30-43769
1 month ago
39-1107
39 days
25843 mitchell-horner
author:mitchell-horner
feat(Combinatorics/SimpleGraph): define `between` subgraphs The simple graph `G.between s t` is the subgraph of `G` containing edges that connect a vertex in the set `s` to a vertex in the set `t`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24948.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24948* t-combinatorics 86/0 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean 1 1 ['github-actions'] b-mehta
assignee:b-mehta
5-64644
5 days ago
112-48756
3 months ago
112-48733
112 days
27602 mitchell-horner
author:mitchell-horner
feat(Combinatorics/SimpleGraph): define `CompleteBipartiteSubgraph` Define the complete bipartite subgraphs of `s` and `t` parts as a "left" subset of `s` vertices and a "right" subset of `t` vertices such that every vertex in the "left" subset is adjacent to every vertex in the "right" subset. In this case `Nonempty (G.CompleteBipartiteSubgraph (card α) (card β))` is equivalent to `completeBipartiteGraph α β ⊑ G`, that is, finding a "left" subset of `s` vertices and a "right" subset of `t` vertices such that every vertex in the "left" subset is adjacent to every vertex in the "right" subset is equivalent to finding an injective homomorphism `completeBipartiteGraph α β` to `G`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 88/0 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean 1 3 ['github-actions', 'mitchell-horner', 'vlad902'] YaelDillies
assignee:YaelDillies
5-64618
5 days ago
67-33992
2 months ago
67-34036
67 days
29002 grunweg
author:grunweg
chore: move Data/Real/Irrational to RingTheory It certainly has nothing to do with data (structures). --- I'm less sure where to put it instead. [zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Cleaning.20up.20.60Data.60/with/536301893) suggested this place; in the future, this could also be split. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed awaiting-zulip 10/10 Counterexamples/IrrationalPowerOfIrrational.lean,Mathlib.lean,Mathlib/Analysis/Real/Pi/Irrational.lean,Mathlib/Data/Real/GoldenRatio.lean,Mathlib/NumberTheory/DiophantineApproximation/Basic.lean,Mathlib/NumberTheory/Rayleigh.lean,Mathlib/NumberTheory/Transcendental/Liouville/Basic.lean,Mathlib/RingTheory/Real/Irrational.lean,Mathlib/Tactic/NormNum/Irrational.lean,Mathlib/Topology/Instances/AddCircle/DenseSubgroup.lean,Mathlib/Topology/Instances/Irrational.lean 11 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
5-63422
5 days ago
5-63505
5 days ago
0-67
1 minute
30042 JovanGerb
author:JovanGerb
feat(push): `@[push]` attributes for `∈` in `Set`, `Finset` and `Multiset` This PR adds `@[push]` annotations for the membership relations, for `Set`, `Finset` and `Multiset`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 169/104 Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/ListOfFn.lean,Mathlib/Algebra/Order/Group/Multiset.lean,Mathlib/Data/DFinsupp/Interval.lean,Mathlib/Data/Finmap.lean,Mathlib/Data/Finset/BooleanAlgebra.lean,Mathlib/Data/Finset/Dedup.lean,Mathlib/Data/Finset/Defs.lean,Mathlib/Data/Finset/Disjoint.lean,Mathlib/Data/Finset/Filter.lean,Mathlib/Data/Finset/Image.lean,Mathlib/Data/Finset/Insert.lean,Mathlib/Data/Finset/Lattice/Basic.lean,Mathlib/Data/Finset/Lattice/Fold.lean,Mathlib/Data/Finset/Pi.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Finset/Range.lean,Mathlib/Data/Finset/SDiff.lean,Mathlib/Data/Finset/Sigma.lean,Mathlib/Data/Finset/Sum.lean,Mathlib/Data/Finset/Sups.lean,Mathlib/Data/Finset/Union.lean,Mathlib/Data/Fintype/Defs.lean,Mathlib/Data/Multiset/AddSub.lean,Mathlib/Data/Multiset/Antidiagonal.lean,Mathlib/Data/Multiset/Bind.lean,Mathlib/Data/Multiset/Dedup.lean,Mathlib/Data/Multiset/Defs.lean,Mathlib/Data/Multiset/Filter.lean,Mathlib/Data/Multiset/FinsetOps.lean,Mathlib/Data/Multiset/MapFold.lean,Mathlib/Data/Multiset/Pi.lean,Mathlib/Data/Multiset/Range.lean,Mathlib/Data/Multiset/Replicate.lean,Mathlib/Data/Multiset/Sort.lean,Mathlib/Data/Multiset/Sum.lean,Mathlib/Data/Multiset/UnionInter.lean,Mathlib/Data/Multiset/ZeroCons.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Order/Interval/Finset/Defs.lean,Mathlib/Order/Interval/Multiset.lean,Mathlib/Order/Interval/Set/Defs.lean,Mathlib/Order/SetNotation.lean,MathlibTest/push.lean 48 1 ['github-actions'] nobody
5-63253
5 days ago
6-9064
6 days ago
6-9043
6 days
30039 JovanGerb
author:JovanGerb
feat(push): `@[push]` annotations for `Real.log` This PR adds `push` annotations, and tests for `Real.log`. It also updates the `#push` and `#pull` commands so that they can take a discharger, and can take any head. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 45/18 Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Tactic/Push.lean,MathlibTest/push.lean 4 1 ['github-actions'] nobody
5-62871
5 days ago
6-11955
6 days ago
6-11934
6 days
28052 EtienneC30
author:EtienneC30
feat: positive semidefinite sesquilinear forms Define positive semidefinite sesquilinear forms and prove that a `SesquilinForm R M` is positive semidefinite if and only if the corresponding matrix is positive semidefinite. --- - [x] depends on: #27873 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
226/0 Mathlib.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean,Mathlib/LinearAlgebra/SesquilinearForm/IsPosSemidef.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
5-51952
5 days ago
5-52640
5 days ago
0-0
0 seconds
28097 themathqueen
author:themathqueen
feat(LinearAlgebra/Matrix/PosDef): kronecker of positive (semi-)definite matrices is positive (semi-)definite This first shows that `U * x * star U` is positive (semi-)definite if and only if `x` is, for an invertible matrix `U` in a not necessarily commutative star-ring. Then using the spectral theorem, it follows that the kronecker of positive (semi-)definite matrices is positive (semi-)definite. --- - [x] depends on: #28093 - [x] depends on: #28476 - [x] depends on: #28544 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
88/5 Mathlib/Algebra/Star/SelfAdjoint.lean,Mathlib/LinearAlgebra/Matrix/Hermitian.lean,Mathlib/LinearAlgebra/Matrix/Kronecker.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean 4 9 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'themathqueen'] joneugster
assignee:joneugster
5-49600
5 days ago
8-56322
8 days ago
32-20872
32 days
29315 unknown
author:unknown
chore: raise priority of `IsTopologicalSemiring.toIsModuleTopology` unknown description t-topology awaiting-author -1/-1 -1 n/a [] nobody
5-46646
5 days ago
unknown
unknown
29789 robertmaxton42
author:robertmaxton42
feat (TopCat.Sphere) : add the open ball, instances * Adds `𝔹 n`, the open `n`-ball, as a bundled object in `TopCat`, and accompanying notation and inclusion hom * Adds instances witnessing that both inclusions are mono and that the disk and disk-boundary are compact --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-author 40/3 Mathlib/Topology/Category/TopCat/Sphere.lean 1 7 ['github-actions', 'ocfnash'] ocfnash
assignee:ocfnash
5-45296
5 days ago
5-45296
5 days ago
9-51207
9 days
29361 FlAmmmmING
author:FlAmmmmING
feat: Catalan generating function as a formal power series We introduce the Catalan generating function as a formal power series over `ℕ`. ## Main Definitions * `PowerSeries.catalanSeries`: The Catalan generating function as a power series. ## Main Results * `PowerSeries.sum_coeff_X_catalanSeries`: When `n` is a natural number, each term in the sum `coeff i X * catalan (n - i)` is 0 except for `i = 1`. * `PowerSeries.coeff_X_mul_catalanSeries`: The coefficient of `X * catalanSeries` at `X^n` is `catalan (n - 1)` when `n > 0`. * `PowerSeries.catalanSeries_one_add_X_mul_self_sq`: The Catalan generating function satisfies the equation `catalanSeries = 1 + X * catalanSeries ^ 2`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor 71/0 Mathlib.lean,Mathlib/RingTheory/PowerSeries/Catalan.lean 2 4 ['Ruben-VandeVelde', 'github-actions', 'wwylele'] kbuzzard
assignee:kbuzzard
5-36686
5 days ago
28-67077
28 days ago
28-67109
28 days
27290 themathqueen
author:themathqueen
feat: `Star`, `StarAddMonoid`, and `StarModule` instances for tensor products This pr defines the `Star`, `StarAddMonoid` and `StarModule` instances on tensor product spaces. And the `StarRing` instance. --- - [x] depends on: #27288 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
55/0 Mathlib.lean,Mathlib/LinearAlgebra/TensorProduct/Star.lean,Mathlib/RingTheory/TensorProduct/Basic.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'themathqueen'] nobody
5-35782
5 days ago
5-39015
5 days ago
5-39831
5 days
28925 grunweg
author:grunweg
chore: remove `linear_combination'` tactic When `linear_combination` was refactored in #15899, the old code was kept as the `linear_combination'` tactic, for easier migration. The consensus of the zulip discussion ([#mathlib4 > Narrowing the scope of `linear_combination` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Narrowing.20the.20scope.20of.20.60linear_combination.60/near/470237816)) was to wait, and "revisit this once people have experienced the various tactics in practice". One year later, the old tactic has almost no uses: it is unused in mathlib; [searching on github](https://github.com/search?q=linear_combination%27%20path%3A*.lean&type=code) yields 37 hits --- all of which are in various forks of mathlib. Thus, removing this tactic seems appropriate. --- Do not merge before the zulip discussion has concluded! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 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 3 ['euprunin', 'github-actions', 'grunweg'] nobody
5-34986
5 days ago
39-20894
1 month ago
0-1
1 second
27228 themathqueen
author:themathqueen
feat: defining the inner product on tensor products This defines the inner product on tensor product spaces. Also defines `OrthonormalBasis.tensorProduct`. The implementation is based on [here](https://github.com/ocfnash/lean-shannon-lovasz/blob/e63e535599ffb3c2a7e995e1621847693dd68fab/src/to_mathlib/analysis/inner_product_space/tensor_product.lean#L404) (by @jjaassoonn), which defines the inner product on real tensor product spaces. The exact same implementation also applies for the general case. Closes #6020 --- - [x] depends on: #27288 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-analysis
label:t-algebra$
281/0 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/TensorProduct.lean,Mathlib/LinearAlgebra/FiniteDimensional/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Basis.lean 4 5 ['eric-wieser', 'github-actions', 'mathlib4-dependent-issues-bot', 'themathqueen'] nobody
5-34814
5 days ago
5-34815
5 days ago
5-36116
5 days
29589 grunweg
author:grunweg
feat: add mfderiv_prod and mfderiv_prodMap Part of my bordism theory project: these will be needed for https://github.com/leanprover-community/mathlib4/pull/22059. Updated version of #22642. --- - [x] depends on: #30049 for ease of reviewing [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry 81/0 Mathlib/Analysis/Calculus/FDeriv/Prod.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
5-31771
5 days ago
5-53402
5 days ago
5-53410
5 days
30009 ADedecker
author:ADedecker
chore: rename `IsTopologicalGroup.toUniformSpace` to `IsTopologicalGroup.rightUniformSpace` I have plans to finally do left and right uniformities properly, but I'd like to do some of the remaining before the fact to ease review. I also take this opportunity to remove a duplication of private lemmas `extend_Z_bilin_aux` and `extend_Z_bilin_key`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 104/184 Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/LocallyConvex/Bounded.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Normed/Group/Quotient.lean,Mathlib/Analysis/Normed/Operator/Compact.lean,Mathlib/Analysis/NormedSpace/Multilinear/Basic.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Analysis/SpecialFunctions/Bernstein.lean,Mathlib/Topology/Algebra/Group/Defs.lean,Mathlib/Topology/Algebra/InfiniteSum/Group.lean,Mathlib/Topology/Algebra/InfiniteSum/NatInt.lean,Mathlib/Topology/Algebra/IsUniformGroup/Basic.lean,Mathlib/Topology/Algebra/IsUniformGroup/Defs.lean,Mathlib/Topology/Algebra/Module/Alternating/Topology.lean,Mathlib/Topology/Algebra/Module/FiniteDimension.lean,Mathlib/Topology/Algebra/Module/LocallyConvex.lean,Mathlib/Topology/Algebra/Module/Multilinear/Topology.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean,Mathlib/Topology/Algebra/Nonarchimedean/AdicTopology.lean,Mathlib/Topology/Algebra/UniformFilterBasis.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean,Mathlib/Topology/ContinuousMap/Algebra.lean 23 3 ['github-actions', 'mathlib4-merge-conflict-bot', 'plp127'] nobody
5-30770
5 days ago
5-30792
5 days ago
6-44200
6 days
30056 vlad902
author:vlad902
feat(GroupTheory): finitely generated groups are quotients of free groups on finite generators This is equivalent to the formulation that finitely generated groups/monoids are quotients of FreeGroups/Monoids over the same generators, though I think the phrasing as a surjective homomorphism is more useful. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory 31/0 Mathlib/GroupTheory/Finiteness.lean 1 1 ['github-actions'] nobody
5-29387
5 days ago
5-29403
5 days ago
5-29438
5 days
29362 stepanholub
author:stepanholub
feat:(Data/List) add the notion of period of List and prove the Periodicity Lemma Add the concept of the period of a List (word, sequence) which is missing, and prove its basic nontrivial property describing under which conditions list can have two periods known as the Periodicity Lemma (aka Fine-Wilf Theorem). --- t-data new-contributor 227/0 Mathlib.lean,Mathlib/Data/List/PeriodicityLemma.lean 2 125 ['Ruben-VandeVelde', 'Timeroot', 'fpvandoorn', 'github-actions', 'madvorak', 'plp127', 'stepanholub', 'wwylele'] nobody
5-26634
5 days ago
9-29448
9 days ago
27-25647
27 days
29652 fmortimore
author:fmortimore
feat(Order): the Bourbaki–Witt theorem We prove the Bourbaki-Witt theorem, one of Wiedijk's 1000+ theorems --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order 231/0 Mathlib.lean,Mathlib/Order/BourbakiWitt.lean,docs/1000.yaml 3 7 ['eric-wieser', 'fmortimore', 'github-actions', 'wwylele'] Vierkantor
assignee:Vierkantor
5-23195
5 days ago
19-19925
19 days ago
19-19958
19 days
30062 plp127
author:plp127
chore(Order/Defs/PartialOrder): golf non-instance Golf `decidableLTOfDecidableLE` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order easy 2/6 Mathlib/Order/Defs/PartialOrder.lean 1 1 ['github-actions'] nobody
5-16146
5 days ago
5-16210
5 days ago
5-16201
5 days
29369 vlad902
author:vlad902
feat(SimpleGraph): `IsSubwalk` of common Walk decompositions Add some helper lemmas to show that decompositions of walks are sub-walks. t-combinatorics 61/17 Mathlib/Combinatorics/SimpleGraph/Connectivity/WalkDecomp.lean,Mathlib/Combinatorics/SimpleGraph/Walk.lean 2 1 ['github-actions'] awainverse
assignee:awainverse
5-8000
5 days ago
28-33477
28 days ago
28-33522
28 days
29376 vlad902
author:vlad902
feat(SimpleGraph): Helper lemmas for `Walk.IsSubwalk` t-combinatorics 29/0 Mathlib/Combinatorics/SimpleGraph/Walk.lean 1 1 ['github-actions'] awainverse
assignee:awainverse
5-7999
5 days ago
27-72099
27 days ago
27-72135
27 days
29758 NotWearingPants
author:NotWearingPants
feat(RingTheory/RootsOfUnity): exp(pi * i * q) is a root of unity for rational q --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor 32/1 Mathlib/RingTheory/RootsOfUnity/Complex.lean 1 5 ['NotWearingPants', 'Ruben-VandeVelde', 'github-actions', 'kckennylau'] chrisflav
assignee:chrisflav
5-7998
5 days ago
15-12814
15 days ago
15-19816
15 days
29864 themathqueen
author:themathqueen
chore(Algebra/Order/BigOperators/Group/{Finset, Multiset}): generalize results to `(Mul)(Add)LeftMono` Generalize some stuff from `IsOrdered(Add)Monoid` to `(Mul)(Add)LeftMono`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
61/53 Mathlib/Algebra/Order/BigOperators/Group/Finset.lean,Mathlib/Algebra/Order/BigOperators/Group/Multiset.lean,Mathlib/Algebra/Order/Group/Int/Sum.lean,Mathlib/Data/NNRat/BigOperators.lean,Mathlib/Tactic/Positivity/Finset.lean 5 1 ['github-actions'] dagurtomas
assignee:dagurtomas
5-7994
5 days ago
12-29034
12 days ago
12-36254
12 days
30041 josephmckinsey
author:josephmckinsey
feat(Algebra/Order/Floor): generalize mul_floor_div theorems to rings and semirings Generalize `mul_cast_floor_div_cancel` from `Field` and `Semifield` to `Ring` and `Semiring`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra awaiting-author
label:t-algebra$
43/31 Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semifield.lean,Mathlib/Algebra/Order/Floor/Semiring.lean,Mathlib/Analysis/Real/OfDigits.lean 4 9 ['Ruben-VandeVelde', 'github-actions', 'josephmckinsey'] nobody
5-5323
5 days ago
5-61293
5 days ago
0-35025
9 hours
29121 Ruben-VandeVelde
author:Ruben-VandeVelde
feat: MvPolynomial.symmetricSubalgebra.{aevalMultiset,sumPolynomial} --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 192/0 Mathlib.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/Eval.lean 2 1 ['github-actions'] chrisflav
assignee:chrisflav
4-68938
4 days ago
35-7665
1 month ago
35-7700
35 days
29501 Vierkantor
author:Vierkantor
test(TacticAnalysis): ensure `classical`'s effects are picked up This test case used to fail, and needed a fix to the `classical` tactic in the standard library: - [x] depends on: https://github.com/leanprover/lean4/pull/10332 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge t-meta 10/0 MathlibTest/TacticAnalysis.lean 1 6 ['Vierkantor', 'github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-67319
4 days ago
6-59796
6 days ago
8-66691
8 days
29946 smmercuri
author:smmercuri
feat(InfinitePlace/Ramification): embeddings of unramified/ramified infinite places satisfy `IsUnmixed/IsMixed` --- - [x] depends on: #29945 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) FLT t-number-theory 52/1 Mathlib/NumberTheory/NumberField/InfinitePlace/Ramification.lean 1 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-59894
4 days ago
4-59916
4 days ago
4-69998
4 days
29309 LLaurance
author:LLaurance
feat(Combinatorics/SimpleGraph): Nontrivial connected graph contains a vertex that leaves the graph connected if removed This shows that any nontrivial connected graph contains a vertex that, when removed, leaves the graph connected. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-combinatorics 156/10 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Walk.lean 5 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
4-56352
4 days ago
4-56352
4 days ago
25-60971
25 days
29735 vihdzp
author:vihdzp
feat: order instances on quotients We define a `Preorder (Quotient s)` instance in the natural way, and prove that it can be strengthened to a `LinearOrder` when all equivalence classes are `OrdConnected`. --- See [Zulip](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Quotient.20of.20linear.20order.20is.20linear.20order/near/539915988) for some long-winded discussion about this. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 125/0 Mathlib.lean,Mathlib/Order/Quotient.lean 2 3 ['github-actions', 'plp127'] bryangingechen
assignee:bryangingechen
4-51193
4 days ago
16-78642
16 days ago
16-78678
16 days
27178 artie2000
author:artie2000
feat(Algebra/Order/Ring): make `IsOrderedRing.toStrictOrderedRing` an instance Requiring `IsStrictOrderedRing` on a `Field` is a footgun (the current instances come from a find and replace on `LinearOrderedField`). Weakening typeclasses can incur a performance hit so will be done where appropriate in future PRs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory RFC delegated 2/1 Mathlib/Algebra/Order/Ring/Defs.lean 1 32 ['Vierkantor', 'YaelDillies', 'alreadydone', 'artie2000', 'erdOne', 'eric-wieser', 'github-actions', 'j-loreaux', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib-bors'] erdOne
assignee:erdOne
4-47705
4 days ago
4-47705
4 days ago
45-49533
45 days
29665 xroblot
author:xroblot
feat(IsCyclotomicExtension): some results for the sub-algebra case We add some results about cyclotomic extensions which are also contained in an extension `A ⊆ B` of rings. In this case, the cyclotomic extension `IsCyclotomicExtension S A C` is determined by `S` and thus we can prove various statements such as the fact that the compositum of `A[ζₙ]` and `A[ζₘ]` is `A[ζₗ]` where `l` is the lcm of `n` and `m`. --- - [x] depends on: #29600 t-algebra
label:t-algebra$
121/12 Mathlib/NumberTheory/Cyclotomic/Basic.lean 1 8 ['erdOne', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'ocfnash', 'xroblot'] ocfnash
assignee:ocfnash
4-44333
4 days ago
4-44455
4 days ago
17-14433
17 days
29642 pechersky
author:pechersky
chore(RingTheory/AdicValuation,LaurentSeries): switch to `WithZero.exp` instead of coercions of `Multiplicative.ofAdd` as requested at https://github.com/leanprover-community/mathlib4/pull/27339#issuecomment-3285102305 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 58/68 Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/NumberTheory/NumberField/FinitePlaces.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/DedekindDomain/SelmerGroup.lean,Mathlib/RingTheory/LaurentSeries.lean 5 3 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
4-40686
4 days ago
4-47194
4 days ago
12-57565
12 days
28395 joelriou
author:joelriou
feat(AlgebraicTopology/SimplicialSet): nondegenerate simplices in the standard simplex In this PR, we show that `d`-dimensional nondegenerate simplices in `Δ[n]` identify to `Fin (d + 1) ↪o Fin (n + 1)`. (This PR also contains some general additional API for (non)degenerate simplices. For this reason, three definitions related to subcomplexes generated by a simplex had to be moved from `StdSimplex.lean` to `Subcomplex.lean`.) --- - [x] depends on: #28337 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology maintainer-merge 247/20 Mathlib/AlgebraicTopology/SimplicialSet/Degenerate.lean,Mathlib/AlgebraicTopology/SimplicialSet/Simplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/AlgebraicTopology/SimplicialSet/Subcomplex.lean,Mathlib/Order/Hom/Basic.lean 5 24 ['github-actions', 'joelriou', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'robin-carlier'] robin-carlier
assignee:robin-carlier
4-39647
4 days ago
4-44993
4 days ago
23-16427
23 days
29425 pechersky
author:pechersky
feat(NumberTheory/Padics/Torsion): `HasEnoughRootsOfUnity ℤ_[p] (p - 1)` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #29403 - [x] depends on: #29404 - [x] depends on: #29405 - [x] depends on: #29408 - [x] depends on: #29424 t-ring-theory 179/0 Mathlib.lean,Mathlib/NumberTheory/Padics/Torsion.lean,Mathlib/RingTheory/ZMod/Torsion.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-38594
4 days ago
4-39270
4 days ago
4-39905
4 days
26104 xroblot
author:xroblot
feat(NumberField/IsCM): compute ratio of regulators This PR continues the work from #23696. Compute the ratio between the regulator of `K` and the regulator of its maximal real subfield. --- - [x] depends on: #23694 - [x] depends on: #26075 - [x] depends on: #26108 t-number-theory 75/4 Mathlib/GroupTheory/Index.lean,Mathlib/NumberTheory/NumberField/CMField.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/TotallyRealComplex.lean,Mathlib/NumberTheory/NumberField/Units/Regulator.lean 4 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'xroblot'] nobody
4-38261
4 days ago
4-40153
4 days ago
4-41538
4 days
29518 joelriou
author:joelriou
feat(CategoryTheory): extremal epimorphisms An extremal epimorphism `p : X ⟶ Y` is an epimorphism which does not factor through any proper subobject of `Y`. In case the category has equalizers, we show that a morphism `p : X ⟶ Y` which does not factor through any proper subobject of `Y` is automatically an epimorphism, and also an extremal epimorphism. We also show that a strong epimorphism is an extremal epimorphism, and that both notions coincide when the category has pullbacks. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 75/0 Mathlib.lean,Mathlib/CategoryTheory/ExtremalEpi.lean 2 3 ['github-actions', 'joelriou'] robin-carlier
assignee:robin-carlier
4-38057
4 days ago
4-38057
4 days ago
18-32523
18 days
25794 dagurtomas
author:dagurtomas
feat(CategoryTheory): localization preserves braided structure --- - [x] depends on: #29568 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24485.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24485* file-removed t-category-theory 225/4 Mathlib.lean,Mathlib/CategoryTheory/Localization/Monoidal/Basic.lean,Mathlib/CategoryTheory/Localization/Monoidal/Braided.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Braided/Multifunctor.lean,Mathlib/CategoryTheory/Sites/Monoidal.lean 6 15 ['dagurtomas', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] mattrobball
assignee:mattrobball
4-37432
4 days ago
4-38303
4 days ago
60-47455
60 days
28876 ScottCarnahan
author:ScottCarnahan
feat (Algebra/Group/Action/Basic): add IsLeftCancelSMul This PR adds classes `IsLeftCancelSMul` and `IsLeftCancelVAdd`, for actions that are injective on the left. This property automatically holds for group actions, and for the left multiplication action of a left cancellative monoid. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
51/13 Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Order/AddTorsor.lean 2 5 ['ScottCarnahan', 'dagurtomas', 'github-actions'] dagurtomas
assignee:dagurtomas
4-36622
4 days ago
4-36650
4 days ago
38-49476
38 days
30037 linesthatinterlace
author:linesthatinterlace
feat: Fin.find update We currently define `Fin.find` in a way that is redundant (in the sense that it is just equivalent to `Fin.find?` in batteries). This PR replaces it with a definition that works closer to `Nat.find`, and links the new definition of `Fin.find` to `Fin.find?` in the natural way. --- - [ ] depends on: batteries#1431 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 137/103 Mathlib/Data/Fin/Tuple/Basic.lean,lake-manifest.json 2 6 ['github-actions', 'linesthatinterlace', 'llllvvuu', 'mathlib4-merge-conflict-bot'] nobody
4-35227
4 days ago
4-35245
4 days ago
6-4753
6 days
28224 joelriou
author:joelriou
feat(AlgebraicTopology): the type of non degenerate simplices of a simplicial set In this PR, we introduce the ordered type `X.N` of nondegenerate simplices in a simplicial set `X`. --- - [x] depends on: #27968 - [x] depends on: #28034 - [x] depends on: #26076 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology 217/0 Mathlib.lean,Mathlib/AlgebraicTopology/SimplicialSet/Degenerate.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/CategoryTheory/EpiMono.lean 5 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-32128
4 days ago
4-32141
4 days ago
4-32120
4 days
26985 agjftucker
author:agjftucker
feat(Analysis/Calculus/Implicit): define implicitFunOfProdDomain This PR continues the work from #16743. Original PR: https://github.com/leanprover-community/mathlib4/pull/16743 --- - [x] depends on: #28352 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis 107/4 Mathlib/Analysis/Calculus/Implicit.lean 1 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-31488
4 days ago
4-68493
4 days ago
4-70074
4 days
26668 mariainesdff
author:mariainesdff
feat(Analysis/Normed/Unbundled/SpectralNorm): add API Co-authored-by: @faenuccio --- - [ ] depends on: #26667 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis t-number-theory 127/16 Mathlib/Analysis/Normed/Unbundled/SpectralNorm.lean 1 15 ['MichaelStollBayreuth', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-29918
4 days ago
16-56340
16 days ago
16-57938
16 days
29860 mcdoll
author:mcdoll
feat(Analysis/Fourier): Parseval identity The Plancherel theorem states that the Fourier transform is unitary on L^2. We prove the main step which is that the Fourier transform on Schwartz space preserves the L^2-norm. --- The extension of the Fourier transform to L^2 will be proved in a subsequent PR. - [x] depends on: #29852 - [x] depends on: #29853 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 144/26 Mathlib/Analysis/Distribution/FourierSchwartz.lean,Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/Fourier/FourierTransform.lean,docs/undergrad.yaml 4 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-17642
4 days ago
4-17661
4 days ago
10-20667
10 days
27258 JovanGerb
author:JovanGerb
Imo2020 q6 Original PR: #23431 This PR adds a solution to IMO 2020 Q6. It follows the solution that I found when I was participating in the IMO. I used the statement formalization that was given by @jsm28. TODO: The function `project a b p` that is defined here should be replaced with `signedDist a p (b -ᵥ a)`. --- - [x] depends on: #27257 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO 346/0 Archive.lean,Archive/Imo/Imo2020Q6.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] dwrensha
assignee:dwrensha
4-8000
4 days ago
11-40087
11 days ago
11-41370
11 days
27416 joelriou
author:joelriou
feat(Algebra/Homology): Ext modules In this PR, we show that if `C` is a `R`-linear abelian category, then there is a `R`-module structure on the groups `Ext X Y n` for `X` and `Y` in `C` and `n : ℕ`. --- - [x] depends on: #26031 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra t-category-theory
label:t-algebra$
164/12 Mathlib.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean 5 6 ['Thmoas-Guan', 'github-actions', 'joelriou', 'mathlib4-dependent-issues-bot'] dagurtomas
assignee:dagurtomas
4-7999
4 days ago
11-40100
11 days ago
11-40222
11 days
27742 ChrisHughes24
author:ChrisHughes24
feat(Nat/nth): inequalities about Nat.nth --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 51/0 Mathlib/Data/Nat/Nth.lean 1 3 ['ChrisHughes24', 'github-actions'] pechersky
assignee:pechersky
4-7997
4 days ago
64-58415
2 months ago
64-58455
64 days
27864 BoltonBailey
author:BoltonBailey
feat(Data/{Finset,Multiset}/Sort): give sort functions ≤ default argument Changes the `Finset.sort` and `Multiset.sort` functions to take `≤` as the default relation argument. Then removes this argument where possible through the rest of the library. This involves switching the order of arguments, but I think this is fine, as this function is mostly called by dot notation anyway, and I think it is more typical for the first argument of such functions to have the type that matches the namespace. Thanks to @eric-wieser for suggesting this approach Zulip discussion: [#mathlib4 > Redefine {Fin/Multi}set.sort to take linear order?](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Redefine.20.7BFin.2FMulti.7Dset.2Esort.20to.20take.20linear.20order.3F/with/532398325) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 121/97 Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Data/Finset/Sort.lean,Mathlib/Data/Multiset/Sort.lean,Mathlib/Data/Nat/Nth.lean,Mathlib/GroupTheory/Perm/Cycle/Factors.lean,Mathlib/GroupTheory/Perm/Sign.lean,Mathlib/Logic/Equiv/Finset.lean,Mathlib/Logic/Equiv/Multiset.lean,Mathlib/NumberTheory/ADEInequality.lean 9 5 ['BoltonBailey', 'eric-wieser', 'github-actions', 'grunweg'] pechersky
assignee:pechersky
4-7996
4 days ago
62-42725
2 months ago
63-9859
63 days
27991 sinianluoye
author:sinianluoye
feat (Rat): add Rat.den_eq_of_add_den_eq_one and its dependent lemmas ```lean4 example {q r : ℚ} (h : (q + r).den = 1) : q.den = r.den := by ``` It is so simple, but I couldn't find it in current mathlib repo. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 28/0 Mathlib/Data/Rat/Lemmas.lean 1 14 ['github-actions', 'sinianluoye', 'themathqueen'] pechersky
assignee:pechersky
4-7995
4 days ago
59-7582
1 month ago
59-35630
59 days
28077 ShreckYe
author:ShreckYe
feat(Data/Finset/Card): add some more Pigeonhole Principle theorems `exists_ne_map_eq_of_card_image_lt` and `not_injOn_of_card_image_lt` `exists_ne_map_eq_of_card_image_lt` is a special case of `exists_ne_map_eq_of_card_lt_of_maps_to` where `t` is `s.image f`, and `not_injOn_of_card_image_lt` is its variant using `Set.InjOn`. I ran into some cases where such theorems would save me some time. t-data new-contributor 10/0 Mathlib/Data/Finset/Card.lean 1 4 ['ShreckYe', 'github-actions', 'themathqueen'] pechersky
assignee:pechersky
4-7994
4 days ago
57-60472
1 month ago
57-60514
57 days
28119 JasperMS
author:JasperMS
feat(Data/Set/Pairwise): prove pairwise results for Chains, move `Set.pairwise_iUnion₂` Initiate a new file `Data/Set/Pairwise/Chain.lean` which makes some `Pairwise` results available to the `IsChain` predicate. In the process, move `Set.pairwise_iUnion₂` to group it with similar results. Perform some variable harmonization. Part of Carleson, original result by Edward van de Meent. Moves: - Set.pairwise_iUnion₂: from Data.Set.Lattice to Data.Set.Pairwise.Lattice --- This PR was discussed and advice was given in [#mathlib4 > Novice questions on style and structure](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Novice.20questions.20on.20style.20and.20structure/with/533462814). Many thanks to those who helped me out! Mathlib PRs are still new to me, so please point out where I can improve! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) carleson t-data new-contributor 56/12 Mathlib.lean,Mathlib/Data/Set/Lattice.lean,Mathlib/Data/Set/Pairwise/Chain.lean,Mathlib/Data/Set/Pairwise/Lattice.lean 4 11 ['JasperMS', 'Ruben-VandeVelde', 'edegeltje', 'github-actions'] pechersky
assignee:pechersky
4-7993
4 days ago
56-47197
1 month ago
56-47634
56 days
29351 staroperator
author:staroperator
feat(SetTheory/Cardinal): generalize and rename theorems on `Cardinal.sum` Some theorems on `Cardinal.sum f` are taking `f : ι → Cardinal.{max u v}`, which can be generalized to `f : ι → Cardinal.{v}`. Also rename `sum_le_iSup_lift`, `sum_lt_lift_of_isRegular`, `sum_eq_iSup_lift` etc. to reflect their signatures in names. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 79/36 Mathlib/Data/W/Cardinal.lean,Mathlib/ModelTheory/Encoding.lean,Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Cardinal/Defs.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/SetTheory/Cardinal/Ordinal.lean,Mathlib/SetTheory/Cardinal/Pigeonhole.lean,Mathlib/SetTheory/Cardinal/Regular.lean 10 5 ['github-actions', 'staroperator', 'vihdzp'] alreadydone
assignee:alreadydone
4-7991
4 days ago
29-14059
29 days ago
29-33248
29 days
29365 staroperator
author:staroperator
feat(SetTheory/ZFC): add `ZFSet.card` The same as `ZFSet.rank`, we define `ZFSet.card` as `ZFSet.{u} → Cardinal.{u}` and prove some basic properties. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 123/4 Mathlib.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Cardinal.lean 4 2 ['github-actions', 'staroperator', 'vihdzp'] YaelDillies
assignee:YaelDillies
4-7990
4 days ago
28-54689
28 days ago
28-54726
28 days
29395 YaelDillies
author:YaelDillies
refactor: make `PosMulMono` and alike custom classes In the current setup, users get confusing non-beta-reduced goals involving a subtype when trying to provide an instance of `PosMulMono`. This PR changes it to be a custom structure with the expected fields. This follows `PosSMulMono` and alike. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order t-algebra
label:t-algebra$
187/268 Counterexamples/CanonicallyOrderedCommSemiringTwoMul.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Basic.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Defs.lean,Mathlib/Algebra/Order/GroupWithZero/WithZero.lean,Mathlib/Algebra/Order/Pi.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/InjSurj.lean,Mathlib/Algebra/Order/Ring/Nat.lean,Mathlib/Algebra/Order/Ring/Opposite.lean,Mathlib/Algebra/Order/Ring/Prod.lean,Mathlib/Algebra/Order/Ring/Star.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/Num/Lemmas.lean,Mathlib/Order/Filter/FilterProduct.lean,Mathlib/Order/Filter/Ring.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/NaturalOps.lean,MathlibTest/GRewrite.lean 22 4 ['github-actions', 'mathlib4-merge-conflict-bot'] Vierkantor
assignee:Vierkantor
4-7989
4 days ago
11-69618
11 days ago
21-32232
21 days
29478 llllvvuu
author:llllvvuu
feat(LinearAlgebra): roots of charpoly are the eigenvalues/spectrum Co-authored-by: Aristotle Harmonic --- - [ ] depends on: #29428 for the lemma `LinearMap.charpoly_sub_smul` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra
label:t-algebra$
128/27 Mathlib.lean,Mathlib/LinearAlgebra/Determinant.lean,Mathlib/LinearAlgebra/Eigenspace/Charpoly.lean,Mathlib/LinearAlgebra/Eigenspace/Matrix.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Eigs.lean 5 15 ['github-actions', 'llllvvuu', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'themathqueen'] ocfnash
assignee:ocfnash
4-7988
4 days ago
11-15051
11 days ago
21-11838
21 days
29861 themathqueen
author:themathqueen
feat(LinearAlgebra/Matrix/PosDef): `vecMulVec a (star a)` is positive semi-definite The matrices `vecMulVec a (star a)` and `vecMulVec (star a) a` are always positive semi-definite. And in a nontrivial commutative ring with nontrivial index, they are never positive definite. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
64/0 Mathlib/Data/Matrix/Mul.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean 2 7 ['eric-wieser', 'github-actions', 'themathqueen'] ocfnash
assignee:ocfnash
4-7985
4 days ago
11-52093
11 days ago
12-39931
12 days
29877 Komyyy
author:Komyyy
feat: inner product of the gradient Also, this PR enables the `conj` notation in the file. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 37/10 Mathlib/Analysis/Calculus/Gradient/Basic.lean 1 1 ['github-actions'] hrmacbeth
assignee:hrmacbeth
4-7984
4 days ago
11-53248
11 days ago
11-53228
11 days
29888 mcdoll
author:mcdoll
feat(Analysis/Normed): Extend densely defined LinearMaps to CLM This PR both adds a new and more user-friendly way to extend a CLM defined on a dense subspace. It also moves the old definition to the same file and as a side effect, we reduce the import tree. The moved parts are not modified except for adapting the sections and imports. Original definition of `ContinuousLinearMap.extend` was by Zhouhang Zhou in 2019 (mathlib3 PR #1649) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 254/86 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/LinearPMap.lean,Mathlib/Analysis/Normed/Operator/Completeness.lean,Mathlib/Analysis/Normed/Operator/Extend.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean 5 2 ['github-actions', 'mcdoll'] hrmacbeth
assignee:hrmacbeth
4-7983
4 days ago
11-20451
11 days ago
11-38203
11 days
24050 Paul-Lez
author:Paul-Lez
feat(Data/Finsupp/Pointwise): generalise pointwise scalar multiplication of finsupps As pointed out by @eric-wieser, this creates an instance diamond with `SMul (α → β) (α →₀ (α → β))` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-author 7/4 Mathlib/Data/Finsupp/Pointwise.lean 1 8 ['Paul-Lez', 'eric-wieser', 'github-actions', 'kckennylau', 'pechersky'] pechersky
assignee:pechersky
4-4841
4 days ago
4-5080
4 days ago
168-19511
168 days
25324 eric-wieser
author:eric-wieser
feat: more functorial results about DFinsupp We have these already for Finsupp. The `DFinsupp` statements need some extra casts in some places. --- - [ ] depends on: #27182 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) [#mathlib4 > Equiv.cast for structures @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Equiv.2Ecast.20for.20structures/near/521390935) t-data t-algebra awaiting-author
label:t-algebra$
137/16 Mathlib/Data/DFinsupp/Defs.lean,Mathlib/LinearAlgebra/DFinsupp.lean 2 12 ['github-actions', 'mathlib4-dependent-issues-bot', 'pechersky'] pechersky
assignee:pechersky
4-4114
4 days ago
4-4114
4 days ago
19-26510
19 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 t-data awaiting-author 360/0 MathlibTest/Junk.lean 1 17 ['NotWearingPants', 'Timeroot', 'bryangingechen', 'github-actions', 'leanprover-community-bot-assistant', 'madvorak', 'pechersky', 'vihdzp'] pechersky
assignee:pechersky
4-3331
4 days ago
4-3331
4 days ago
96-70055
96 days
28452 plp127
author:plp127
feat: Define `ZMod.fintype` without cases Define `ZMod.fintype` without casing on `n` except inside the proof. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-author 2/3 Mathlib/Data/ZMod/Defs.lean 1 2 ['github-actions', 'jcommelin'] pechersky
assignee:pechersky
4-2550
4 days ago
4-2550
4 days ago
46-561
46 days
29237 harahu
author:harahu
doc: capitalize archimedean Adjectives derived from people's last names are usually capitalized in English. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 332/331 Counterexamples/MapFloor.lean,Mathlib/Algebra/ContinuedFractions/Computation/ApproximationCorollaries.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/Archimedean/Hom.lean,Mathlib/Algebra/Order/Archimedean/Submonoid.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Hom/Basic.lean,Mathlib/Algebra/Order/Module/Archimedean.lean,Mathlib/Algebra/Order/Nonneg/Floor.lean,Mathlib/Algebra/Order/Ring/Archimedean.lean,Mathlib/Algebra/Order/Ring/Basic.lean,Mathlib/Algebra/Order/Ring/IsNonarchimedean.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Normed/Algebra/Ultra.lean,Mathlib/Analysis/Normed/Field/Ultra.lean,Mathlib/Analysis/Normed/Group/Seminorm.lean,Mathlib/Analysis/Normed/Group/Ultra.lean,Mathlib/Analysis/Normed/Order/Hom/Basic.lean,Mathlib/Analysis/Normed/Order/Hom/Ultra.lean,Mathlib/Analysis/Normed/Ring/Ultra.lean,Mathlib/Analysis/Normed/Unbundled/FiniteExtension.lean,Mathlib/Analysis/Normed/Unbundled/InvariantExtension.lean,Mathlib/Analysis/Normed/Unbundled/SeminormFromBounded.lean,Mathlib/Analysis/Normed/Unbundled/SeminormFromConst.lean,Mathlib/Analysis/Normed/Unbundled/SmoothingSeminorm.lean,Mathlib/Analysis/Normed/Unbundled/SpectralNorm.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Deligne.lean,Mathlib/Data/Int/SuccPred.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Nat/SuccPred.lean,Mathlib/Data/Real/Embedding.lean,Mathlib/GroupTheory/Archimedean.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/NumberTheory/FunctionField.lean,Mathlib/NumberTheory/LSeries/DirichletContinuation.lean,Mathlib/NumberTheory/NumberField/FinitePlaces.lean,Mathlib/NumberTheory/Ostrowski.lean,Mathlib/NumberTheory/Padics/Complex.lean,Mathlib/NumberTheory/Padics/MahlerBasis.lean,Mathlib/NumberTheory/Padics/PadicIntegers.lean,Mathlib/NumberTheory/Padics/PadicNorm.lean,Mathlib/NumberTheory/Padics/ValuativeRel.lean,Mathlib/Order/Filter/AtTopBot/Archimedean.lean,Mathlib/Order/Interval/Finset/Box.lean,Mathlib/Order/SuccPred/Archimedean.lean,Mathlib/Order/SuccPred/Basic.lean,Mathlib/Order/SuccPred/IntervalSucc.lean,Mathlib/Order/SuccPred/LinearLocallyFinite.lean,Mathlib/Order/SuccPred/Tree.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/HahnSeries/Lex.lean,Mathlib/RingTheory/Valuation/Archimedean.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/Topology/Algebra/InfiniteSum/Nonarchimedean.lean,Mathlib/Topology/Algebra/Nonarchimedean/AdicTopology.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/Basic.lean,Mathlib/Topology/Algebra/Nonarchimedean/Completion.lean,Mathlib/Topology/Algebra/Nonarchimedean/TotallyDisconnected.lean,Mathlib/Topology/Algebra/OpenSubgroup.lean,Mathlib/Topology/Algebra/Order/Archimedean.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean,Mathlib/Topology/Connected/Basic.lean,Mathlib/Topology/MetricSpace/BundledFun.lean,Mathlib/Topology/MetricSpace/Ultra/Basic.lean,Mathlib/Topology/MetricSpace/Ultra/Pi.lean,Mathlib/Topology/MetricSpace/Ultra/TotallySeparated.lean,Mathlib/Topology/UniformSpace/Ultra/Basic.lean,Mathlib/Topology/UniformSpace/Ultra/Completion.lean,Mathlib/Topology/UniformSpace/Ultra/Constructions.lean 73 5 ['euprunin', 'github-actions', 'mathlib4-merge-conflict-bot'] dwrensha
assignee:dwrensha
3-56521
3 days ago
18-62735
18 days ago
29-63881
29 days
30073 JovanGerb
author:JovanGerb
feat: new `by_cases!` tactic This PR defines the `by_cases! h : p` tactic, which is a macro for `by_cases h : p` followed by a `try push_neg at h` in the second goal. We use `try push_neg` instead of `push_neg` to make the tactic also succeed when no negation is pushed. Should this maybe throw an warning? This PR also refactors many proofs to use `by_cases!` The tactic implementation can be found in the first commit. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import 574/717 Archive/Imo/Imo2024Q6.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Mathlib.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/Category/Grp/Adjunctions.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/GCDMonoid/Finset.lean,Mathlib/Algebra/GCDMonoid/Multiset.lean,Mathlib/Algebra/GCDMonoid/Nat.lean,Mathlib/Algebra/Group/UniqueProds/Basic.lean,Mathlib/Algebra/Homology/Embedding/TruncGE.lean,Mathlib/Algebra/Homology/HomotopyCofiber.lean,Mathlib/Algebra/Module/PID.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Polynomial/CoeffList.lean,Mathlib/Algebra/Polynomial/Degree/Lemmas.lean,Mathlib/Algebra/Polynomial/Degree/Operations.lean,Mathlib/Algebra/Polynomial/Degree/TrailingDegree.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Polynomial/HasseDeriv.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/Algebra/Polynomial/OfFn.lean,Mathlib/Algebra/Polynomial/Splits.lean,Mathlib/AlgebraicTopology/DoldKan/Decomposition.lean,Mathlib/AlgebraicTopology/DoldKan/Faces.lean,Mathlib/AlgebraicTopology/DoldKan/Projections.lean,Mathlib/AlgebraicTopology/SimplicialObject/II.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Asymptotics/SuperpolynomialDecay.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unique.lean,Mathlib/Analysis/CStarAlgebra/Unitization.lean,Mathlib/Analysis/Calculus/FDeriv/Extend.lean,Mathlib/Analysis/Calculus/FDeriv/Norm.lean,Mathlib/Analysis/Calculus/LocalExtr/Rolle.lean,Mathlib/Analysis/Calculus/SmoothSeries.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Complex/OpenMapping.lean,Mathlib/Analysis/Complex/PhragmenLindelof.lean,Mathlib/Analysis/Convex/Deriv.lean,Mathlib/Analysis/Convex/EGauge.lean,Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/Hofer.lean,Mathlib/Analysis/InnerProductSpace/Orientation.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/Meromorphic/NormalForm.lean,Mathlib/Analysis/Normed/Group/Ultra.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Unbundled/RingSeminorm.lean,Mathlib/Analysis/Normed/Unbundled/SeminormFromBounded.lean,Mathlib/Analysis/Normed/Unbundled/SmoothingSeminorm.lean,Mathlib/Analysis/NormedSpace/Multilinear/Basic.lean,Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Analysis/Polynomial/Basic.lean,Mathlib/Analysis/SpecialFunctions/Complex/Log.lean,Mathlib/Analysis/SpecialFunctions/Log/PosLog.lean,Mathlib/Analysis/SpecialFunctions/Log/Summable.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Complex.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/Analysis/SumOverResidueClass.lean,Mathlib/CategoryTheory/Limits/Shapes/Preorder/WellOrderContinuous.lean,Mathlib/Combinatorics/Additive/RuzsaCovering.lean,Mathlib/Combinatorics/Enumerative/Composition.lean,Mathlib/Combinatorics/HalesJewett.lean,Mathlib/Combinatorics/Hall/Finite.lean,Mathlib/Combinatorics/Matroid/IndepAxioms.lean,Mathlib/Combinatorics/Nullstellensatz.lean,Mathlib/Combinatorics/SetFamily/Intersecting.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Equitabilise.lean,Mathlib/Combinatorics/SimpleGraph/Tutte.lean,Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Control/LawfulFix.lean,Mathlib/Data/Finsupp/MonomialOrder/DegLex.lean,Mathlib/Data/Int/Order/Basic.lean,Mathlib/Data/List/Intervals.lean,Mathlib/Data/Nat/Choose/Factorization.lean,Mathlib/Data/Nat/Digits/Lemmas.lean,Mathlib/Data/Nat/Nth.lean,Mathlib/Data/Real/Embedding.lean,Mathlib/Data/Set/Card/Arithmetic.lean,Mathlib/Data/Set/Equitable.lean,Mathlib/Data/ZMod/Basic.lean,Mathlib/FieldTheory/JacobsonNoether.lean,Mathlib/Geometry/Euclidean/Angle/Oriented/Basic.lean,Mathlib/Geometry/Euclidean/Sphere/Tangent.lean,Mathlib/Geometry/Euclidean/Triangle.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Geometry/Manifold/IntegralCurve/UniformTime.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/LinearAlgebra/Basis/Defs.lean 203 2 ['JovanGerb', 'github-actions'] nobody
3-56076
3 days ago
4-36830
4 days ago
4-36874
4 days
29257 harahu
author:harahu
doc: attach "pre", "pseudo", "semi" and "sub" as a prefixes where they are now free-standing These are all examples of [bound morphemes](https://en.wikipedia.org/wiki/Bound_and_free_morphemes) and should be attached, either in closed form or by hyphen, to some other construct. Whether to write the resulting words with a hyphen or in closed form is a stylistic choice and I am open to discussing the specifics. I've made choices based on existing literature and what I personally found natural. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 50/50 Mathlib/Algebra/Star/NonUnitalSubsemiring.lean,Mathlib/Analysis/Matrix.lean,Mathlib/Analysis/Normed/Field/WithAbs.lean,Mathlib/Analysis/Normed/Group/BallSphere.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Lean/Meta/KAbstractPositions.lean,Mathlib/Lean/Meta/RefinedDiscrTree/Initialize.lean,Mathlib/MeasureTheory/Measure/Regular.lean,Mathlib/Probability/Martingale/BorelCantelli.lean,Mathlib/Topology/EMetricSpace/Basic.lean,Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/Gluing.lean,Mathlib/Topology/MetricSpace/IsometricSMul.lean,Mathlib/Topology/MetricSpace/ProperSpace.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean,Mathlib/Topology/MetricSpace/ThickenedIndicator.lean,Mathlib/Topology/MetricSpace/Thickening.lean,Mathlib/Topology/Metrizable/Basic.lean,Mathlib/Topology/Metrizable/Uniformity.lean,scripts/autolabel.lean 21 1 ['euprunin', 'github-actions'] JovanGerb
assignee:JovanGerb
3-55256
3 days ago
31-30358
1 month ago
31-30398
31 days
30022 ADedecker
author:ADedecker
feat: theory of `IsRightUniformGroup` and `IsLeftUniformGroup` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 1003/367 Mathlib/Topology/Algebra/IsUniformGroup/Basic.lean,Mathlib/Topology/Algebra/IsUniformGroup/Defs.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
3-54347
3 days ago
5-30377
5 days ago
0-0
0 seconds
29089 hrmacbeth
author:hrmacbeth
feat: field tactic This PR creates a `field` tactic, i.e. an analogue of `ring` but for fields -- a finishing tactic for equality goals in fields. It is basically `field_simp; ring1`, with a few tweaks for better error reporting! We could have done this at any point in the last five years, but since `field_simp` is more performant as of #28658, now seems like a good time. I propose that `field` be preferred to terminal `field_simp`/`field_simp; ring` from now on. I'll follow up with a PR ([preview](https://github.com/leanprover-community/mathlib4/commit/44c0136fb8650f57416733d0b336c60b338f3d99)) making this change widely across the library. In the current PR I also rewrote the docstrings of `field_simp` and friends to nudge users in this direction. Closes #4837 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #29917 t-meta delegated 219/7 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Field.lean,Mathlib/Tactic/FieldSimp.lean,MathlibTest/FieldSimp.lean 5 47 ['Vierkantor', 'adomani', 'fpvandoorn', 'github-actions', 'grunweg', 'hrmacbeth', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] grunweg
assignee:grunweg
3-52754
3 days ago
3-53949
3 days ago
28-66972
28 days
29550 Raph-DG
author:Raph-DG
feat(RingTheory): Order of vanishing in a discrete valuation ring In this PR we develop some API for working with the order of vanishing in a discrete valuation ring. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory file-removed 462/3 Mathlib.lean,Mathlib/RingTheory/DiscreteValuationRing/Basic.lean,Mathlib/RingTheory/OrderOfVanishing/Basic.lean,Mathlib/RingTheory/OrderOfVanishing/Properties.lean 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] erdOne
assignee:erdOne
3-45101
3 days ago
3-45128
3 days ago
19-57512
19 days
19668 YaelDillies
author:YaelDillies
refactor: define `≤`/`<` on `WithBot`/`WithTop` by induction The motivation for this change is that it is really confusing to run `intro r s shouldnthaveintroedthat` on a goal of the form `∀ r s : ℝ≥0∞, r ≤ s` and get the nonsense-looking goal `r = ↑shouldnthaveintroedthat → ∃ b : α, s = ↑b ∧ shouldnthaveintroedthat ≤ b⟩` instead of an error, and similarly when destructing something of the form `∃ r s : ℝ≥0∞, r < s`. Furthermore, I suspect this improves performance. --- - [x] depends on: #20317 - [x] depends on: #20318 - [x] depends on: #21274 - [x] depends on: #22109 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author 156/99 Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Analysis/Analytic/OfScalars.lean,Mathlib/Analysis/Oscillation.lean,Mathlib/Data/Finset/Lattice/Fold.lean,Mathlib/Data/Finset/Max.lean,Mathlib/LinearAlgebra/Eigenspace/Triangularizable.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Countable.lean,Mathlib/MeasureTheory/Measure/LevyProkhorovMetric.lean,Mathlib/Order/Interval/Basic.lean,Mathlib/Order/Interval/Set/WithBotTop.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Order/WithBot.lean,Mathlib/Probability/Moments/Variance.lean,Mathlib/RingTheory/PowerBasis.lean,Mathlib/Topology/MetricSpace/Holder.lean,Mathlib/Topology/MetricSpace/HolderNorm.lean,MathlibTest/hint.lean 18 29 ['JovanGerb', 'Vierkantor', 'YaelDillies', 'b-mehta', 'eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'urkud'] Vierkantor
assignee:Vierkantor
3-42087
3 days ago
18-22833
18 days ago
188-80436
188 days
29341 joelriou
author:joelriou
feat(Topology): the topology generated by a family of spaces Some categories of topological spaces are "convenient" in the sense that they have nice categorical properties (e.g. they have limits, colimits and are cartesian closed). This PR is the first in a series towards showing that delta generated spaces form a cartesian closed monoidal category (see https://github.com/joelriou/topcat-model-category/blob/852a514c1d955ab586507bcd5a7b5efb99c6c3df/TopCatModelCategory/Convenient/CartesianClosed.lean#L92 for the general result), and this result is part of my formalization effort towards the Quillen model category structure on simplicial sets. In this PR, given a family `X` of topological spaces, and a topological space `Y`, we introduce the `X`-generated topology on `Y`, which is coinduced by all continuous maps `X i → Y`. (Eventually, this will generalize previous works by Dagur Asgeirsson and Ben Eltschig about compactly/delta generated spaces in mathlib. At some point, their definitions will be refactored as particular cases of the definitions in this PR series.) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 291/0 Mathlib.lean,Mathlib/Topology/Convenient/GeneratedBy.lean,docs/references.bib 3 10 ['github-actions', 'joelriou', 'peabrainiac'] jcommelin
assignee:jcommelin
3-37582
3 days ago
29-63650
29 days ago
29-63628
29 days
29837 jsm28
author:jsm28
feat(Geometry/Euclidean/Incenter): touchpoints in `interior` and `Sbtw` Add lemmas showing that touchpoints for the incenter are in the interior of a face, as is the touchpoint opposite a vertex for the excenter opposite that vertex, and corresponding `Sbtw` statements in the case of a triangle including `Sbtw` statements about the other touchpoints (not in the interior of a side) for an excenter in that case. The `Sbtw` statements are expected to be used in followups together with #29656 to give statements about the incenter and excenters lying on angle bisectors as expressed in terms of angles involving vertices rather than touchpoints. --- - [ ] depends on: #29410 - [ ] depends on: #29418 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry 102/1 Mathlib/Geometry/Euclidean/Incenter.lean 1 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
3-36879
3 days ago
3-38201
3 days ago
3-39372
3 days
29477 izanbf1803
author:izanbf1803
feat(Algebra/Ring/Invertible): add `eq_of_invOf_add_eq_invOf_add_invOf` Formalize statement and prove eq_of_invOf_add_eq_invOf_add_invOf ⅟(a + b) = ⅟a + ⅟b → a * ⅟b * a = b * ⅟a * b (for a, b in a ring; a, b invertible) This will be useful to formalize a proof in https://github.com/eric-wieser/lean-matrix-cookbook. new-contributor t-algebra awaiting-author
label:t-algebra$
28/0 Mathlib/Algebra/Ring/Invertible.lean 1 10 ['eric-wieser', 'github-actions', 'izanbf1803', 'ocfnash'] ocfnash
assignee:ocfnash
3-31672
3 days ago
5-42271
5 days ago
18-75864
18 days
30089 loefflerd
author:loefflerd
feat(NumberTheory/ModularForms): WIP on widths of cusps --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory WIP 458/17 Mathlib.lean,Mathlib/Algebra/Group/Subgroup/Lattice.lean,Mathlib/Data/Set/Constructions.lean,Mathlib/LinearAlgebra/Matrix/GeneralLinearGroup/FinTwo.lean,Mathlib/NumberTheory/ModularForms/ArithmeticSubgroups.lean,Mathlib/NumberTheory/ModularForms/Cusps.lean,Mathlib/Topology/Algebra/ContinuousMonoidHom.lean,Mathlib/Topology/Algebra/IsUniformGroup/DiscreteSubgroup.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/DiscreteSubset.lean 10 n/a ['github-actions'] nobody
3-26250
3 days ago
unknown
unknown
25822 ScottCarnahan
author:ScottCarnahan
WIP: experiments with vertex algebras This is a testbed for various attempts at things. Please don't bother reviewing. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #25821.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/25821* large-import WIP 8040/293 Mathlib.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Lie/Abelian.lean,Mathlib/Algebra/Lie/ChevalleyEilenberg.lean,Mathlib/Algebra/Lie/Cochain.lean,Mathlib/Algebra/Lie/Cocycle.lean,Mathlib/Algebra/Lie/Extension.lean,Mathlib/Algebra/Lie/Extension/CentralExtension.lean,Mathlib/Algebra/Lie/Loop.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Order/AddTorsor.lean,Mathlib/Algebra/Order/Monoid/Prod.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/Algebra/Polynomial/Nusmeval.lean,Mathlib/Algebra/Polynomial/Smeval.lean,Mathlib/Algebra/Vertex/Affine.lean,Mathlib/Algebra/Vertex/Basic.lean,Mathlib/Algebra/Vertex/Defs.lean,Mathlib/Algebra/Vertex/HVertexOperator.lean,Mathlib/Algebra/Vertex/VertexOperator.lean,Mathlib/Data/Finset/SMulAntidiagonal.lean,Mathlib/Data/Finsupp/PointwiseSMul.lean,Mathlib/Data/FunLike/Equiv.lean,Mathlib/Data/Prod/RevLex.lean,Mathlib/Data/Set/SMulAntidiagonal.lean,Mathlib/GroupTheory/GroupAction/Equiv.lean,Mathlib/GroupTheory/GroupAction/Hom.lean,Mathlib/RingTheory/Binomial.lean,Mathlib/RingTheory/DividedPowers/Cauchy.lean,Mathlib/RingTheory/FormalSeries.lean,Mathlib/RingTheory/HahnSeries/Addition.lean,Mathlib/RingTheory/HahnSeries/Basic.lean,Mathlib/RingTheory/HahnSeries/Binomial.lean,Mathlib/RingTheory/HahnSeries/HEval.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean,Mathlib/RingTheory/HahnSeries/PowerSeries.lean,Mathlib/RingTheory/HahnSeries/Summable.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/PowerSeries/Binomial.lean,Mathlib/RingTheory/PowerSeries/Eval.lean 41 n/a ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
3-16169
3 days ago
unknown
unknown
29207 YaelDillies
author:YaelDillies
chore(MonoidAlgebra/Defs): reorder, rename variables Sort the declarations according to typeclass assumptions, *and* according to the order in which we need them to be for #25273. Rename the semiring variable to `R` and the monoid one to `M`. Simultaneously golf. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
461/588 Mathlib/Algebra/Category/Ring/Adjunctions.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MonoidAlgebra/Division.lean,Mathlib/Algebra/MonoidAlgebra/Grading.lean,Mathlib/Algebra/MonoidAlgebra/MapDomain.lean,Mathlib/Algebra/MonoidAlgebra/Module.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/Polynomial/Laurent.lean 9 6 ['JovanGerb', 'YaelDillies', 'github-actions'] dagurtomas
assignee:dagurtomas
3-7982
3 days ago
10-37328
10 days ago
10-37313
10 days
29729 Ruben-VandeVelde
author:Ruben-VandeVelde
feat: Ideal.ramificationIdx_mul_inertiaDeg_of_isLocalRing --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) FLT t-number-theory 27/0 Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/RingTheory/DedekindDomain/Basic.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean 3 8 ['Ruben-VandeVelde', 'github-actions', 'mathlib4-merge-conflict-bot', 'tb65536', 'xroblot'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
3-7981
3 days ago
10-71451
10 days ago
16-65383
16 days
29772 ScottCarnahan
author:ScottCarnahan
feat (RingTheory/HahnSeries/Multiplication): Add group instances to HahnModule This PR adds `Zero` and `AddCommGroup` instances to `HahnModule` when appropriate. We also add comparison lemmas for subtraction in the `AddCommGroup` case, and reorganize some `variables`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 18/9 Mathlib/RingTheory/HahnSeries/Multiplication.lean 1 1 ['github-actions'] erdOne
assignee:erdOne
3-7980
3 days ago
15-56166
15 days ago
15-56202
15 days
29781 chrisflav
author:chrisflav
feat(RingTheory/Finiteness): a finite and finitely presented algebra is finitely presented We show that if `S` is finite as a module over `R` and finitely presented as an algebra over `R`, then it is finitely presented as a module over `R`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 357/36 Mathlib.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Basic.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Finiteness/ModuleFinitePresentation.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/Polynomial/Quotient.lean 9 1 ['github-actions'] erdOne
assignee:erdOne
3-7979
3 days ago
15-36648
15 days ago
15-36628
15 days
29800 YaelDillies
author:YaelDillies
chore: rename `MonoidHom.toAdditive''` to `MonoidHom.toAdditiveLeft` and alike --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
118/80 Mathlib/Algebra/Group/Action/End.lean,Mathlib/Algebra/Group/Equiv/TypeTags.lean,Mathlib/Algebra/Group/Nat/Hom.lean,Mathlib/Algebra/Group/TypeTags/Hom.lean,Mathlib/Algebra/Order/Hom/TypeTags.lean,Mathlib/Data/Finsupp/Ext.lean,Mathlib/Data/Int/Cast/Lemmas.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/GroupTheory/FiniteAbelian/Basic.lean,Mathlib/NumberTheory/NumberField/Units/DirichletTheorem.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/LowDegree.lean,Mathlib/RingTheory/FreeCommRing.lean,Mathlib/RingTheory/Valuation/RankOne.lean 14 1 ['github-actions'] dagurtomas
assignee:dagurtomas
3-7978
3 days ago
10-83498
10 days ago
14-73811
14 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`. --- --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra
label:t-algebra$
94/0 Mathlib/LinearAlgebra/Matrix/Transvection.lean,MathlibTest/matrix.lean 2 2 ['github-actions', 'zach1502'] riccardobrasca
assignee:riccardobrasca
3-7977
3 days ago
11-24287
11 days ago
12-3352
12 days
29909 Vierkantor
author:Vierkantor
feat(CI): add build output to CI workflows This PR uses the Zulip build report script (originally developed for the nightly-regression-report workflow) to add a summary of build output to other Zulip posts about workflow results. This allows us to more easily see the origin of a failure. This requires redoing the script a little to make it a bit more flexible, and the output is slightly reformatted to become consistent across the various workflows (4 of them that post to Zulip). We don't do so for the nightly-testing failures, since those run in a different workflow, and it would be a lot of work to access the command output from another workflow. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 93/69 .github/workflows/daily.yml,.github/workflows/nightly-docgen.yml,.github/workflows/nightly-regression-report.yml,scripts/zulip_build_report.sh 4 1 ['github-actions'] robertylewis
assignee:robertylewis
3-7976
3 days ago
10-45751
10 days ago
10-45732
10 days
29953 slashbade
author:slashbade
feat: add reap for experiment --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 44/6 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,Cache/IO.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,lake-manifest.json,lakefile.lean 9 1 ['github-actions'] nobody
2-83908
2 days ago
9-7962
9 days ago
0-0
0 seconds
29154 ScottCarnahan
author:ScottCarnahan
feat (Algebra/Lie): Define low-degree cochains and differentials This PR defines 1-cochains and 2-cochains of a Lie algebra `L` with coefficients in an `L`-module `M`. This special case is useful for constructing central extensions of Lie algebras, while not needing the general machinery of Lie algebra cohomology. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
199/0 Mathlib.lean,Mathlib/Algebra/Lie/Abelian.lean,Mathlib/Algebra/Lie/Cochain.lean 3 7 ['ScottCarnahan', 'github-actions', 'ocfnash'] ocfnash
assignee:ocfnash
2-77715
2 days ago
4-81394
4 days ago
30-54450
30 days
29253 FernandoChu
author:FernandoChu
feat(CategoryTheory): (Co)limits in preorders Characterize (co)limits in preorders as glbs/lubs, plus some other instances. new-contributor t-category-theory 151/13 Mathlib/CategoryTheory/Discrete/Basic.lean,Mathlib/CategoryTheory/Limits/Preorder.lean 2 12 ['FernandoChu', 'github-actions', 'joelriou'] joelriou
assignee:joelriou
2-65685
2 days ago
2-65689
2 days ago
29-64327
29 days
30088 FernandoChu
author:FernandoChu
feat(CategoryTheory): `Exists` gives images We show that (the underlying arrow of) `(exists f.obj) x` is an image. This is a prerequisite of the [MTT project](https://github.com/kyoDralliam/model-theory-topos), which aims to use the internal language of toposes to reason about e.g. sheaves. t-category-theory 147/2 Mathlib/CategoryTheory/Limits/Shapes/Images.lean,Mathlib/CategoryTheory/Skeletal.lean,Mathlib/CategoryTheory/Subobject/Basic.lean 3 6 ['FernandoChu', 'github-actions', 'joelriou'] nobody
2-65022
2 days ago
2-65022
2 days ago
2-80016
2 days
25974 scholzhannah
author:scholzhannah
feat(Topology/Compactness/CompactlyCoherentSpace): compact coherentification (k-ification) This PR defines the notion of turning an arbitrary topological space into a compactly coherent space. Compactly coherent spaces are commonly referred to as "compactly generated spaces" or "k-spaces" in the literature while the operation of turning a space into such as space is called the "k-ification". There are however three different notions that are described with this name. To disambiguate we use the names "compactly coherent space" and "compactcoherentification" here. See [this wikipedia page](https://en.wikipedia.org/wiki/Compactly_generated_space) for an explanation of these notions. This PR continues the work from #25318. Original PR: https://github.com/leanprover-community/mathlib4/pull/25318 Co-authored-by: Floris van Doorn large-import t-topology 174/5 Mathlib/Topology/Compactness/CompactlyCoherentSpace.lean 1 4 ['github-actions', 'joelriou', 'scholzhannah'] ADedecker
assignee:ADedecker
2-64633
2 days ago
3-50355
3 days ago
102-30768
102 days
30109 scholzhannah
author:scholzhannah
feat: the subcomplexes of a (relative classical) CW complex form a completely distributive lattice In this PR we prove that the space of subcomplexes `Subcomplex C` of a (relative classical) CW complex `C` is a `CompletelyDistribLattice`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 390/1 Mathlib/Topology/CWComplex/Classical/Subcomplex.lean 1 1 ['github-actions'] nobody
2-60835
2 days ago
2-62866
2 days ago
2-62901
2 days
27073 pechersky
author:pechersky
feat(Archive/Examples/Local): files showcasing properties of local fields for p-adics, completions of number fields, laurent series, and fraction rings of witt vectors Should get filled in as more data/instances are declared --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory 139/0 Archive.lean,Archive/Examples/Local/Laurent.lean,Archive/Examples/Local/NumberField.lean,Archive/Examples/Local/Padic.lean,Archive/Examples/Local/Witt.lean 5 6 ['faenuccio', 'github-actions', 'mathlib4-merge-conflict-bot', 'riccardobrasca'] riccardobrasca
assignee:riccardobrasca
2-60721
2 days ago
26-33991
26 days ago
77-50756
77 days
24789 Ruben-VandeVelde
author:Ruben-VandeVelde
chore: move Algebra.Group.Hom.End to Algebra.Ring This moves us towards the goal of not depending on `Ring` under `Algebra.Group`; this is mentioned in https://github.com/leanprover-community/mathlib4/issues/11757 and on [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Call.20for.20help.3A.20technical.2F.20organisational.20debt/near/512348574). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-algebra awaiting-author
label:t-algebra$
4/10 Mathlib.lean,Mathlib/Algebra/Group/Hom/Instances.lean,Mathlib/Algebra/Module/End.lean,Mathlib/Algebra/MonoidAlgebra/Division.lean,Mathlib/Algebra/Ring/Hom/End.lean 5 9 ['Ruben-VandeVelde', 'YaelDillies', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'riccardobrasca'] riccardobrasca
assignee:riccardobrasca
2-60659
2 days ago
2-60659
2 days ago
14-7845
14 days
30105 slashbade
author:slashbade
feat: add `reap` as internal tactic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-meta 664/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/Reap.lean,Mathlib/Tactic/Reap/Basic.lean,Mathlib/Tactic/Reap/Future/Basic.lean,Mathlib/Tactic/Reap/Future/PP.lean,Mathlib/Tactic/Reap/OpenAIClient/Basic.lean,Mathlib/Tactic/Reap/OpenAIClient/Test.lean,Mathlib/Tactic/Reap/OpenAIClient/Types.lean,Mathlib/Tactic/Reap/Options.lean,Mathlib/Tactic/Reap/PremiseSelection/API.lean,Mathlib/Tactic/Reap/PremiseSelection/Syntax.lean,Mathlib/Tactic/Reap/PremiseSelection/Test.lean,Mathlib/Tactic/Reap/Requests/Basic.lean,Mathlib/Tactic/Reap/Requests/Future.lean,Mathlib/Tactic/Reap/Requests/Test.lean,Mathlib/Tactic/Reap/Tactic/Generator.lean,Mathlib/Tactic/Reap/Tactic/Search.lean,Mathlib/Tactic/Reap/Tactic/Syntax.lean,Mathlib/Tactic/Reap/Tactic/Test.lean 21 1 ['github-actions'] nobody
2-60551
2 days ago
2-71975
2 days ago
0-0
0 seconds
29306 YaelDillies
author:YaelDillies
chore(GroupTheory/GroupAction/Basic): don't import `Module` This is useful to be able to replace `NoZeroSMulDivisors` with `Module.IsTorsionFree` later. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
16/17 Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/LinearAlgebra/Projectivization/Cardinality.lean 2 8 ['YaelDillies', 'eric-wieser', 'github-actions', 'riccardobrasca'] eric-wieser
assignee:eric-wieser
2-59764
2 days ago
26-71585
26 days ago
30-32930
30 days
29300 Louddy
author:Louddy
feat: SkewPolynomial ## Univariate skew polynomials Skew polynomials are represented as `SkewMonoidAlgebra R (Multiplicative ℕ)`, where `R` is usually at least a Semiring. In this file, we define `SkewPolynomial` and provide basic instances. The point if this PR is to introduce the very most basic definitions and API. From #23949. Co-authored-by: María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)> --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
178/0 Mathlib.lean,Mathlib/Algebra/SkewPolynomial/Basic.lean,docs/references.bib 3 1 ['github-actions'] riccardobrasca
assignee:riccardobrasca
2-59702
2 days ago
30-59790
1 month ago
30-59817
30 days
29314 Louddy
author:Louddy
feat(SkewMonoidAlgebra): Lifts for skew monoid algebras Lemmas about different kinds of "lifts" to `SkewMonoidAlgebra` - Similar in spirit to the MonoidAlgebra.Lift file. Co-authored-by: María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)> --- - [x] depends on: #29310 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 238/2 Mathlib.lean,Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/Algebra/SkewMonoidAlgebra/Lift.lean 3 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] riccardobrasca
assignee:riccardobrasca
2-59654
2 days ago
4-27502
4 days ago
4-32922
4 days
29143 RemyDegenne
author:RemyDegenne
feat(Probability/Decision): basic properties of the Bayes risk - Comparison of the Bayes risk and the minimax risk - Maximal value of the Bayes risk and particular cases where it equals that value - Data-processing inequality --- - [x] depends on: #29137 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 262/1 Mathlib.lean,Mathlib/Probability/Decision/Risk/Basic.lean,Mathlib/Probability/Decision/Risk/Defs.lean 3 14 ['EtienneC30', 'RemyDegenne', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] EtienneC30
assignee:EtienneC30
2-56895
2 days ago
2-56895
2 days ago
4-72789
4 days
30029 ADedecker
author:ADedecker
feat: define IsRightUniformGroup and IsLeftUniformGroup This mostly contains the definition and additional documentation. Future PRs will take care of expanding the theory, and proving in particular that `IsUniformGroup` is precisely the conjuction of these two typeclasses. --- - [x] depends on: #30025 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 199/36 Mathlib/Topology/Algebra/IsUniformGroup/Basic.lean,Mathlib/Topology/Algebra/IsUniformGroup/Defs.lean 2 9 ['ADedecker', 'github-actions', 'leanprover-bot', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
2-56200
2 days ago
5-30670
5 days ago
5-41904
5 days
30085 riccardobrasca
author:riccardobrasca
feat: add Mathlib.RingTheory.RootsOfUnity.Units We abb basic results about cyclotomic units. From `flt-regular`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra t-number-theory awaiting-author
label:t-algebra$
112/0 Mathlib.lean,Mathlib/RingTheory/RootsOfUnity/Units.lean 2 14 ['faenuccio', 'github-actions', 'riccardobrasca'] faenuccio
assignee:faenuccio
2-53686
2 days ago
2-58050
2 days ago
0-78074
21 hours
28349 kckennylau
author:kckennylau
feat(Meta): add notation for naming stacked polynomials This PR changes the notation for naming formal variables associated to recursive polynomial-like objects. Registration is done only once per each polynomial-like functor. Usage: ```lean register_poly_vars "[" "]" Polynomial Polynomial.C Polynomial.X register_poly_vars (mv := true) "[" "]" MvPolynomial MvPolynomial.C MvPolynomial.X name_poly_vars R[a,b][C] name_poly_vars _[x,y,z] ``` `_[[x,y,z]]` allows for the hole to be substituted by any base ring, so `(x : R[[x,y,z]])` will be valid syntax. --- I have not mass deployed the new syntax at every possible location, I plan to do that in a future PR following this. Zulip: [#mathlib4 > Notation for polynomial variables](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Notation.20for.20polynomial.20variables) This is a refactor of the currently existing [Mathlib.Tactic.namePolyVarsOver](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Tactic/Ring/NamePolyVars.html#Mathlib.Tactic.namePolyVarsOver). More explicitly, the current invocation `name_poly_vars x,y over R` is now `poly_variable R[x,y]`. The behaviours inherited from `name_poly_vars` are: * We do not synthesize the necessary instances (such as `[CommRing R]`) at the point of declaration, but only when the new notations are used. * We refer to an explicit term (`R` in the examples) which is "fixed", in the sense that: * it is only valid for `R` explicitly, and not any other `variable` such as `S`. * it has built-in hygiene, so if you shadow the variable by declaring a new `variable (R : Type*)`, it will still refer to the old one. And the new behaviours are: * Currently only `x` and `y` are new notations, but in the new tactic the whole ring `R[x,y]` is also available as notation. * Currently only the forward direction (i.e. elaboration, going from `x` to `MvPolynomial.X 0`) is implemented, but in the new tactic we also implement the backward direction, printing `MvPolynomial.X 0` back as `x` (and `MvPolynomial (Fin 2) R` is printed as `R[x,y]`). * Support beyond just `MvPolynomial`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 652/88 Counterexamples/CliffordAlgebraNotInjective.lean,Mathlib.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/PolyVariable.lean,Mathlib/Tactic/Ring/NamePolyVars.lean,MathlibTest/PolyVariable.lean,scripts/noshake.json 10 80 ['JovanGerb', 'adamtopaz', 'eric-wieser', 'github-actions', 'j-loreaux', 'kckennylau', 'kim-em', 'plp127', 'robertmaxton42', 'sgouezel'] adamtopaz
assignee:adamtopaz
2-52255
2 days ago
10-44568
10 days ago
50-24492
50 days
30107 grunweg
author:grunweg
chore: track occurrences of 'nonrec' as technical debt Matches leanprover-community/leanprover-community.github.io#689: only merge when that is deemed a good idea. -------- TODO: make the count more robust, for instance count all occurrences of "^nonrec " plus those of "^[private|protected] nonrec ". --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt CI 1/0 scripts/technical-debt-metrics.sh 1 1 ['github-actions'] nobody
2-50034
2 days ago
2-67284
2 days ago
2-67265
2 days
26332 Timeroot
author:Timeroot
feat(ModelTheory/Definability): TermDefinable functions This PR continues the work from #23506. Original PR: https://github.com/leanprover-community/mathlib4/pull/23506 t-logic 145/0 Mathlib/Data/Rel.lean,Mathlib/ModelTheory/Definability.lean,scripts/noshake.json 3 28 ['Timeroot', 'github-actions', 'mathlib4-merge-conflict-bot', 'staroperator'] fpvandoorn
assignee:fpvandoorn
2-48897
2 days ago
18-39982
18 days ago
100-1771
100 days
27819 BGuillemet
author:BGuillemet
feat(CategoryTheory/Yoneda): add curried version of Yoneda lemma for heterogeneous universes, and other version of homNatIso Prove a curried version of `yonedaCompUliftFunctorEquiv`, ie a completely functorial version of the Yoneda lemma with heterogeneous universes. Dually, prove a curried version of `coyonedaCompUliftFunctorEquiv`, ie a completely functorial version of the coYoneda lemma with heterogeneous universes. In addition, prove a functorial version of `FullyFaithful.natEquiv` using `coyoneda` instead of `yoneda` (previously, the only functorial version of `FullyFaithful.natEquiv` were `homNatIso`, which is written using `yoneda`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory 159/66 Mathlib/CategoryTheory/Abelian/GrothendieckCategory/EnoughInjectives.lean,Mathlib/CategoryTheory/Filtered/Final.lean,Mathlib/CategoryTheory/Limits/IndYoneda.lean,Mathlib/CategoryTheory/Limits/Indization/FilteredColimits.lean,Mathlib/CategoryTheory/Limits/Yoneda.lean,Mathlib/CategoryTheory/Monoidal/Braided/Reflection.lean,Mathlib/CategoryTheory/Sites/DenseSubsite/Basic.lean,Mathlib/CategoryTheory/Yoneda.lean 8 12 ['BGuillemet', 'github-actions', 'joelriou', 'mathlib4-merge-conflict-bot'] nobody
2-45652
2 days ago
2-45652
2 days ago
15-7962
15 days
26287 mbkybky
author:mbkybky
feat(Data/ENat/Lattice): coercion to `WithBot ℕ∞` commutes with `biSup` The coercion from `ℕ∞` to `WithBot ℕ∞` commutes with `biSup` and `biInf`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 24/0 Mathlib/Data/ENat/Lattice.lean 1 5 ['github-actions', 'kckennylau', 'mbkybky'] ericrbg
assignee:ericrbg
2-44726
2 days ago
2-44726
2 days ago
82-45951
82 days
27971 smmercuri
author:smmercuri
feat: weak approximation theorems for infinite places of a number field Under the diagonal embedding into infinite places, a number field $K$ is dense inside both the product $\prod_{v \mid \infty} (K, v)$, where $(K, v)$ denotes $K$ equipped with $v$'s topology, and the infinite adele ring $\prod_v K_v$. This PR continues the work from #22153. Original PR: https://github.com/leanprover-community/mathlib4/pull/22153 --- - [x] depends on: #27969 large-import FLT t-algebra t-number-theory
label:t-algebra$
98/2 Mathlib/Analysis/Normed/Field/WithAbs.lean,Mathlib/NumberTheory/NumberField/AdeleRing.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Basic.lean 3 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'smmercuri'] nobody
2-44288
2 days ago
2-49091
2 days ago
2-51743
2 days
29020 grunweg
author:grunweg
chore: squeeze a few non-terminal simps Founds by the flexible linter in #28962. --- - [ ] depends on : #29027 - [ ] depends on: #30106 - [ ] depends on: #30091 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author 91/70 Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/Field/GeomSum.lean,Mathlib/Analysis/CStarAlgebra/SpecialFunctions/PosPart.lean,Mathlib/Analysis/Calculus/LHopital.lean,Mathlib/Analysis/Complex/ValueDistribution/FirstMainTheorem.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/Meromorphic/NormalForm.lean,Mathlib/Analysis/Meromorphic/TrailingCoefficient.lean,Mathlib/Analysis/NormedSpace/MultipliableUniformlyOn.lean,Mathlib/Analysis/ODE/Gronwall.lean,Mathlib/Analysis/Real/Pi/Irrational.lean,Mathlib/Analysis/SpecialFunctions/BinaryEntropy.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/IntegralRepresentation.lean,Mathlib/Analysis/SpecialFunctions/Gaussian/FourierTransform.lean,Mathlib/Analysis/SpecialFunctions/MulExpNegMulSq.lean,Mathlib/Analysis/SpecialFunctions/MulExpNegMulSqIntegral.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Arctan.lean,Mathlib/CategoryTheory/Galois/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Braided.lean,Mathlib/CategoryTheory/SmallObject/Construction.lean,Mathlib/Combinatorics/Additive/VerySmallDoubling.lean,Mathlib/Combinatorics/Enumerative/Composition.lean,Mathlib/Combinatorics/SetFamily/FourFunctions.lean,Mathlib/Combinatorics/SetFamily/KruskalKatona.lean,Mathlib/Combinatorics/SimpleGraph/ConcreteColorings.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/WalkDecomp.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Uniform.lean,Mathlib/Data/Nat/Digits/Lemmas.lean,Mathlib/Geometry/Manifold/MFDeriv/Basic.lean,Mathlib/Geometry/Manifold/Riemannian/Basic.lean,Mathlib/GroupTheory/Coxeter/Basic.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfStabilizer.lean,Mathlib/LinearAlgebra/TensorProduct/Associator.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Periodic.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Basic.lean,Mathlib/NumberTheory/Zsqrtd/Basic.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Order/OrderIsoNat.lean,Mathlib/Probability/ProbabilityMassFunction/Constructions.lean,Mathlib/RingTheory/HahnSeries/Lex.lean,Mathlib/RingTheory/KrullDimension/Module.lean,Mathlib/RingTheory/MvPowerSeries/Substitution.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Eval.lean,Mathlib/Tactic/NormNum/Irrational.lean,Mathlib/Topology/Algebra/InfiniteSum/UniformOn.lean,Mathlib/Topology/Order.lean,Mathlib/Topology/PartitionOfUnity.lean 49 33 ['YaelDillies', 'b-mehta', 'github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vlad902'] nobody
2-44144
2 days ago
2-44681
2 days ago
0-1958
32 minutes
30101 wwylele
author:wwylele
feat(Algebra/HahnEmbedding): ArchimedeanStrata is non-empty This is a small part of #27268 (Hahn embedding theorem). Separated out for easy review while waiting for the other dependency. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra
label:t-algebra$
8/0 Mathlib/Algebra/Order/Module/HahnEmbedding.lean 1 1 ['github-actions'] nobody
2-40954
2 days ago
3-17171
3 days ago
3-17216
3 days
27552 Equilibris
author:Equilibris
chore: Move variables into `variable` declaration in typevec This will be needed to allow `M.corec` to be generic across universes --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor easy awaiting-author 16/10 Mathlib/Data/TypeVec.lean 1 12 ['Equilibris', 'eric-wieser', 'github-actions', 'pechersky', 'plp127'] pechersky
assignee:pechersky
2-34349
2 days ago
4-1598
4 days ago
64-38904
64 days
30114 euprunin
author:euprunin
chore(Data/Finset): golf entire `powersetCard_zero` using `grind` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 1/5 Mathlib/Data/Finset/Powerset.lean 1 1 ['github-actions'] nobody
2-31351
2 days ago
2-31351
2 days ago
2-31424
2 days
25969 101damnations
author:101damnations
feat(RepresentationTheory/Homological/GroupHomology/Functoriality): the degree 1 part of the corestriction-coinflation exact sequence Given a `G`-representation `A` and a normal subgroup `S` of `G`, this PR defines the corestriction-coinflation short complex `H₁(S, A) ⟶ H₁(G, A) ⟶ H₁(G ⧸ S, A_S)` induced by the natural inclusion `S → G` and projections `G → G / S, A → A_S`. We prove it's exact, and that the righthand map is an epimorphism. --- - [x] depends on: #21652 - [x] depends on: #21732 - [x] depends on: #21733 - [x] depends on: #21735 - [x] depends on: #21736 - [x] depends on: #21738 - [x] depends on: #25868 - [x] depends on: #25873 - [x] depends on: #25880 - [x] depends on: #25884 - [x] depends on: #25888 - [x] depends on: #25939 - [x] depends on: #25952 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *Earlier version at #22656.* t-algebra
label:t-algebra$
262/9 Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/RepresentationTheory/Coinvariants.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/Basic.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/Functoriality.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/LowDegree.lean 5 n/a ['101damnations', 'github-actions', 'jcommelin', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
2-25601
2 days ago
unknown
unknown
30108 EtienneC30
author:EtienneC30
refactor: generalize LinearMap.toMatrix₂ and Matrix.toLinearMap₂ to sesquilinear forms Generalize [LinearMap.toMatrix₂](https://leanprover-community.github.io/mathlib4_docs/Mathlib/LinearAlgebra/Matrix/SesquilinearForm.html#LinearMap.toMatrix%E2%82%82) to take a sesquilinear map as input. Create `Matrix.toLinearMapₛₗ₂` to generalize [Matrix.toLinearMap₂](https://leanprover-community.github.io/mathlib4_docs/Mathlib/LinearAlgebra/Matrix/SesquilinearForm.html#Matrix.toLinearMap%E2%82%82) to sesquilinear maps, while still keeping [Matrix.toLinearMap₂](https://leanprover-community.github.io/mathlib4_docs/Mathlib/LinearAlgebra/Matrix/SesquilinearForm.html#Matrix.toLinearMap%E2%82%82) to avoid specifying `RingHom.id R` in the bilinear case. Only do so for maps which are semilinear in the first coordinate to avoid specifying `RingHom.id R` for the second homomorphism. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
56/12 Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean 1 1 ['github-actions'] nobody
2-24725
2 days ago
2-63127
2 days ago
0-0
0 seconds
30116 FormulaRabbit81
author:FormulaRabbit81
feat(Measure): proof that a relatively compact set of measures is tight --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-measure-probability 196/2 Mathlib/MeasureTheory/Measure/Tight.lean 1 1 ['github-actions'] nobody
2-18215
2 days ago
2-18252
2 days ago
2-18288
2 days
28604 alreadydone
author:alreadydone
chore(Algebra/Ring/Defs): add two classes (minimally invasive version) Add the missing `NonAssocComm(Semi)ring` classes and add some missing instances between existing classes. Contrary to #28532, the approach here doesn't add any new `extends`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
59/17 Mathlib/Algebra/Colimit/DirectLimit.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Basic.lean 3 19 ['alreadydone', 'github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] nobody
2-12199
2 days ago
2-12199
2 days ago
2-71218
2 days
29956 NotWearingPants
author:NotWearingPants
feat(Algebra/Polynomial): small and useful lemmas feat(Algebra/Polynomial): added many small and useful lemmas about polynomials --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-algebra
label:t-algebra$
299/74 Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Lemmas.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/Eval/Coeff.lean,Mathlib/Algebra/Polynomial/Eval/Defs.lean,Mathlib/Algebra/Polynomial/Eval/Degree.lean,Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Algebra/Polynomial/Splits.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/FieldTheory/IsAlgClosed/Basic.lean,Mathlib/FieldTheory/NormalizedTrace.lean,Mathlib/RingTheory/SimpleRing/Basic.lean,Mathlib/RingTheory/Trace/Basic.lean 16 44 ['NotWearingPants', 'erdOne', 'github-actions', 'kckennylau', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] nobody
2-9908
2 days ago
2-12916
2 days ago
8-82270
8 days
26757 fweth
author:fweth
feat(CategoryTheory/Topos): define elementary topos This commit begins the formalization of the notion of an *elementary topos*, following the definition in \[Mac Lane & Moerdijk, *Sheaves in Geometry and Logic* (1992), Ch. IV, Section 1]. It introduces the file `Mathlib/CategoryTheory/Topos/Basic.lean`, which currently includes: * The definition of an elementary topos. * Proof that the power object map is a functor * Theorem about pullbacks of characterstic maps Subobject classifiers, which are used in the definition, have already been defined in `CategoryTheory/Topos/Classifier.lean` Work in progress: further formalization of the section is planned. Questions: * Should the definition of power objects be separated into its own file/module, perhaps under `CategoryTheory/Topos/PowerObject.lean`? * Is the notation `P` / `P_morph` / `P_functor` for the power object functor on objects / morphisms / total acceptable? * Should the comments and docstrings rather use the notation from the book, where `g ∘ f` denotes arrow composition from righ to left, or the Lean variant `f ≫ g`? Klaus Gy klausgy@gmail.com --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory 391/68 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 14 ['fweth', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] joelriou
assignee:joelriou
2-8012
2 days ago
26-45175
26 days ago
46-17338
46 days
27978 smmercuri
author:smmercuri
feat: `InfinitePlace.Extension` API for extensions of infinite places. If `L / K` are fields and `v : InfinitePlace K`, then we define and add basic API for `v.Extension L` : the subtype of `w : InfinitePlace L` whose restriction to `K` matches `v`. This PR continues the work from #24881. Original PR: https://github.com/leanprover-community/mathlib4/pull/24881 --- - [x] depends on: #27977 FLT t-number-theory 49/0 Mathlib/NumberTheory/NumberField/InfinitePlace/Ramification.lean 1 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
2-8010
2 days ago
9-39187
9 days ago
9-67090
9 days
29941 themathqueen
author:themathqueen
feat(Algebra/Star): define the convolution star on linear maps This pr defines the _convolution_ star operation on linear maps `E →ₗ F` where `(star f) x = star (f (star x))`. This corresponds to a map being star-preserving, i.e., a map is self-adjoint iff it is star-preserving. The name "convolution star" is just to match the naming of the _convolution_ product in #25183. This is scoped to `ConvolutionStar` as to not conflict with the global instance on `E →ₗ[𝕜] E` on finite-dimensional Hilbert spaces, where `star` is defined as `LinearMap.adjoint`. In a finite-dimensional C⋆-algebra with a positive linear functional, which induces the GNS Hilbert space (TODO) and a coalgebra given by the adjoint of the multiplication map and the algebra unit map (TODO), we get a star ring where multiplication is given by the convolution product and star is given by the convolution star. In such a space, we can then define the isomorphism `(E →ₗ[ℂ] F) ≃⋆ₐ (F ⊗[ℂ] Eᵐᵒᵖ)`, which is an important identification in the theory of non-commutative graphs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
94/0 Mathlib.lean,Mathlib/Algebra/Star/Convolution.lean 2 1 ['github-actions'] ocfnash
assignee:ocfnash
2-8002
2 days ago
9-51626
9 days ago
9-52389
9 days
30117 euprunin
author:euprunin
chore(Data/Rat): golf entire `inv_intCast_num_of_pos` and `den_inv_of_ne_zero` using `simp` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 2/9 Mathlib/Data/Rat/Lemmas.lean 1 1 ['github-actions'] nobody
1-80275
1 day ago
1-80290
1 day ago
1-80325
1 day
27370 euprunin
author:euprunin
chore(Tactic/CancelDenoms): golf entire `cancel_factors_eq` using `grind` ---
Show trace profiling of cancel_factors_eq: 120 ms before, 46 ms after 🎉 ### Trace profiling of `cancel_factors_eq` before PR 27370 ```diff diff --git a/Mathlib/Tactic/CancelDenoms/Core.lean b/Mathlib/Tactic/CancelDenoms/Core.lean index c4b62d3e29..3ec2128994 100644 --- a/Mathlib/Tactic/CancelDenoms/Core.lean +++ b/Mathlib/Tactic/CancelDenoms/Core.lean @@ -80,6 +80,7 @@ theorem cancel_factors_le {α} [Field α] [LinearOrder α] [IsStrictOrderedRing · exact mul_pos had hbd · exact one_div_pos.2 hgcd +set_option trace.profiler true in theorem cancel_factors_eq {α} [Field α] {a b ad bd a' b' gcd : α} (ha : ad * a = a') (hb : bd * b = b') (had : ad ≠ 0) (hbd : bd ≠ 0) (hgcd : gcd ≠ 0) : (a = b) = (1 / gcd * (bd * a') = 1 / gcd * (ad * b')) := by ``` ``` ℹ [436/436] Built Mathlib.Tactic.CancelDenoms.Core (2.8s) info: Mathlib/Tactic/CancelDenoms/Core.lean:84:0: [Elab.command] [0.015258] theorem cancel_factors_eq {α} [Field α] {a b ad bd a' b' gcd : α} (ha : ad * a = a') (hb : bd * b = b') (had : ad ≠ 0) (hbd : bd ≠ 0) (hgcd : gcd ≠ 0) : (a = b) = (1 / gcd * (bd * a') = 1 / gcd * (ad * b')) := by rw [← ha, ← hb, ← mul_assoc bd, ← mul_assoc ad, mul_comm bd] ext; constructor · rintro rfl rfl · intro h simp only [← mul_assoc] at h refine mul_left_cancel₀ (mul_ne_zero ?_ ?_) h on_goal 1 => apply mul_ne_zero on_goal 1 => apply div_ne_zero · exact one_ne_zero all_goals assumption [Elab.definition.header] [0.014988] CancelDenoms.cancel_factors_eq info: Mathlib/Tactic/CancelDenoms/Core.lean:84:0: [Elab.async] [0.122474] elaborating proof of CancelDenoms.cancel_factors_eq [Elab.definition.value] [0.119890] CancelDenoms.cancel_factors_eq [Elab.step] [0.118614] rw [← ha, ← hb, ← mul_assoc bd, ← mul_assoc ad, mul_comm bd] ext; constructor · rintro rfl rfl · intro h simp only [← mul_assoc] at h refine mul_left_cancel₀ (mul_ne_zero ?_ ?_) h on_goal 1 => apply mul_ne_zero on_goal 1 => apply div_ne_zero · exact one_ne_zero all_goals assumption [Elab.step] [0.118601] rw [← ha, ← hb, ← mul_assoc bd, ← mul_assoc ad, mul_comm bd] ext; constructor · rintro rfl rfl · intro h simp only [← mul_assoc] at h refine mul_left_cancel₀ (mul_ne_zero ?_ ?_) h on_goal 1 => apply mul_ne_zero on_goal 1 => apply div_ne_zero · exact one_ne_zero all_goals assumption [Elab.step] [0.010324] rw [← ha, ← hb, ← mul_assoc bd, ← mul_assoc ad, mul_comm bd] [Elab.step] [0.010312] (rewrite [← ha, ← hb, ← mul_assoc bd, ← mul_assoc ad, mul_comm bd]; with_annotate_state"]" (try (with_reducible rfl))) [Elab.step] [0.010299] rewrite [← ha, ← hb, ← mul_assoc bd, ← mul_assoc ad, mul_comm bd]; with_annotate_state"]" (try (with_reducible rfl)) [Elab.step] [0.010291] rewrite [← ha, ← hb, ← mul_assoc bd, ← mul_assoc ad, mul_comm bd]; with_annotate_state"]" (try (with_reducible rfl)) [Elab.step] [0.105805] · intro h simp only [← mul_assoc] at h refine mul_left_cancel₀ (mul_ne_zero ?_ ?_) h on_goal 1 => apply mul_ne_zero on_goal 1 => apply div_ne_zero · exact one_ne_zero all_goals assumption [Elab.step] [0.105661] intro h simp only [← mul_assoc] at h refine mul_left_cancel₀ (mul_ne_zero ?_ ?_) h on_goal 1 => apply mul_ne_zero on_goal 1 => apply div_ne_zero · exact one_ne_zero all_goals assumption [Elab.step] [0.105650] intro h simp only [← mul_assoc] at h refine mul_left_cancel₀ (mul_ne_zero ?_ ?_) h on_goal 1 => apply mul_ne_zero on_goal 1 => apply div_ne_zero · exact one_ne_zero all_goals assumption [Elab.step] [0.043946] refine mul_left_cancel₀ (mul_ne_zero ?_ ?_) h [Elab.step] [0.043859] expected type: a = b, term mul_left_cancel₀ (mul_ne_zero ?_ ?_) h [Elab.step] [0.025447] expected type: ?m.103 * ?m.104 ≠ 0, term (mul_ne_zero ?_ ?_) [Elab.step] [0.025432] expected type: ?m.103 * ?m.104 ≠ 0, term mul_ne_zero ?_ ?_ [Meta.synthInstance] [0.019262] ✅️ NoZeroDivisors α [Elab.step] [0.021441] on_goal 1 => apply mul_ne_zero [Elab.step] [0.019543] apply mul_ne_zero [Elab.step] [0.019530] apply mul_ne_zero [Elab.step] [0.019514] apply mul_ne_zero [Meta.synthInstance] [0.013986] ✅️ NoZeroDivisors α [Elab.step] [0.018650] · exact one_ne_zero [Elab.step] [0.018355] exact one_ne_zero [Elab.step] [0.018309] exact one_ne_zero [Elab.step] [0.018269] exact one_ne_zero [Elab.step] [0.017827] expected type: 1 ≠ 0, term one_ne_zero [Meta.synthInstance] [0.012295] ✅️ NeZero 1 Build completed successfully (436 jobs). ``` ### Trace profiling of `cancel_factors_eq` after PR 27370 ```diff diff --git a/Mathlib/Tactic/CancelDenoms/Core.lean b/Mathlib/Tactic/CancelDenoms/Core.lean index c4b62d3e29..066f915189 100644 --- a/Mathlib/Tactic/CancelDenoms/Core.lean +++ b/Mathlib/Tactic/CancelDenoms/Core.lean @@ -80,20 +80,11 @@ theorem cancel_factors_le {α} [Field α] [LinearOrder α] [IsStrictOrderedRing · exact mul_pos had hbd · exact one_div_pos.2 hgcd +set_option trace.profiler true in theorem cancel_factors_eq {α} [Field α] {a b ad bd a' b' gcd : α} (ha : ad * a = a') (hb : bd * b = b') (had : ad ≠ 0) (hbd : bd ≠ 0) (hgcd : gcd ≠ 0) : (a = b) = (1 / gcd * (bd * a') = 1 / gcd * (ad * b')) := by - rw [← ha, ← hb, ← mul_assoc bd, ← mul_assoc ad, mul_comm bd] - ext; constructor - · rintro rfl - rfl - · intro h - simp only [← mul_assoc] at h - refine mul_left_cancel₀ (mul_ne_zero ?_ ?_) h - on_goal 1 => apply mul_ne_zero - on_goal 1 => apply div_ne_zero - · exact one_ne_zero - all_goals assumption + grind theorem cancel_factors_ne {α} [Field α] {a b ad bd a' b' gcd : α} (ha : ad * a = a') (hb : bd * b = b') (had : ad ≠ 0) (hbd : bd ≠ 0) (hgcd : gcd ≠ 0) : ``` ``` ℹ [436/436] Built Mathlib.Tactic.CancelDenoms.Core (3.1s) info: Mathlib/Tactic/CancelDenoms/Core.lean:84:0: [Elab.command] [0.034809] theorem cancel_factors_eq {α} [Field α] {a b ad bd a' b' gcd : α} (ha : ad * a = a') (hb : bd * b = b') (had : ad ≠ 0) (hbd : bd ≠ 0) (hgcd : gcd ≠ 0) : (a = b) = (1 / gcd * (bd * a') = 1 / gcd * (ad * b')) := by grind [Elab.definition.header] [0.014091] CancelDenoms.cancel_factors_eq info: Mathlib/Tactic/CancelDenoms/Core.lean:84:0: [Elab.async] [0.046425] elaborating proof of CancelDenoms.cancel_factors_eq [Elab.definition.value] [0.045869] CancelDenoms.cancel_factors_eq [Elab.step] [0.045340] grind [Elab.step] [0.045327] grind [Elab.step] [0.045311] grind info: Mathlib/Tactic/CancelDenoms/Core.lean:87:2: [Elab.async] [0.027621] Lean.addDecl [Kernel] [0.027585] ✅️ typechecking declarations [CancelDenoms.cancel_factors_eq._proof_1_1] Build completed successfully (436 jobs). ```
t-meta easy 1/11 Mathlib/Tactic/CancelDenoms/Core.lean 1 7 ['euprunin', 'github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] alexjbest
assignee:alexjbest
1-77941
1 day ago
8-66129
8 days ago
73-14517
73 days
29661 euprunin
author:euprunin
chore(Data): golf entire `tail_cons` using `rfl`. fix `coe_eq_image_val` theorem statement. ---
Show trace profiling of tail_cons: <10 ms before, <10 ms after 🎉 ### Trace profiling of `tail_cons` before PR 29661 ```diff diff --git a/Mathlib/Data/Seq/Defs.lean b/Mathlib/Data/Seq/Defs.lean index fc03ab5f49..aba7137487 100644 --- a/Mathlib/Data/Seq/Defs.lean +++ b/Mathlib/Data/Seq/Defs.lean @@ -229,6 +229,7 @@ theorem head_cons (a : α) (s) : head (cons a s) = some a := by theorem tail_nil : tail (nil : Seq α) = nil := rfl +set_option trace.profiler true in @[simp] theorem tail_cons (a : α) (s) : tail (cons a s) = s := by obtain ⟨f, al⟩ := s ``` ``` ✔ [428/428] Built Mathlib.Data.Seq.Defs (3.8s) Build completed successfully (428 jobs). ``` ### Trace profiling of `tail_cons` after PR 29661 ```diff diff --git a/Mathlib/Data/Seq/Defs.lean b/Mathlib/Data/Seq/Defs.lean index fc03ab5f49..ad65ea7a8f 100644 --- a/Mathlib/Data/Seq/Defs.lean +++ b/Mathlib/Data/Seq/Defs.lean @@ -229,11 +229,9 @@ theorem head_cons (a : α) (s) : head (cons a s) = some a := by theorem tail_nil : tail (nil : Seq α) = nil := rfl +set_option trace.profiler true in @[simp] -theorem tail_cons (a : α) (s) : tail (cons a s) = s := by - obtain ⟨f, al⟩ := s - apply Subtype.eq - dsimp [tail, cons] +theorem tail_cons (a : α) (s) : tail (cons a s) = s := rfl theorem head_eq_some {s : Seq α} {x : α} (h : s.head = some x) : s = cons x s.tail := by diff --git a/Mathlib/Data/Set/Functor.lean b/Mathlib/Data/Set/Functor.lean index 35063a2feb..7b52b24536 100644 --- a/Mathlib/Data/Set/Functor.lean +++ b/Mathlib/Data/Set/Functor.lean @@ -139,10 +139,7 @@ as was defined in `Data.Set.Notation`. -/ attribute [local instance] Set.monad in /-- The coercion from `Set.monad` as an instance is equal to the coercion in `Data.Set.Notation`. -/ theorem coe_eq_image_val (t : Set s) : - @Lean.Internal.coeM Set s α _ _ t = (t : Set α) := by - change ⋃ (x ∈ t), {x.1} = _ - ext - simp + @Lean.Internal.coeM Set s α _ _ t = (t : Set α) := rfl variable {β : Set α} {γ : Set β} {a : α} ``` ``` ✔ [428/428] Built Mathlib.Data.Seq.Defs (1.0s) Build completed successfully (428 jobs). ```
--- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/)
t-data 2/5 Mathlib/Data/Seq/Defs.lean,Mathlib/Data/Set/Functor.lean 2 7 ['Ruben-VandeVelde', 'eric-wieser', 'euprunin', 'github-actions'] nobody
1-77244
1 day ago
1-77291
1 day ago
4-22664
4 days
26464 joelriou
author:joelriou
feat(LinearAlgebra): generators of pi tensor products In this PR, we show that the `R`-module `⨂[R] i, M i` is finitely generated if the index type is finite and all `M i` are finitely generated. This follows from a more precise result about generators of `⨂[R] i, M i`. --- This PR continues the work from #18725. Original PR: https://github.com/leanprover-community/mathlib4/pull/18725 file-removed t-algebra
label:t-algebra$
270/5 Mathlib.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/SubtypeNeLift.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/TensorPower/Basic.lean,Mathlib/LinearAlgebra/TensorPower/Symmetric.lean,Mathlib/RingTheory/PiTensorProduct.lean,Mathlib/SetTheory/Cardinal/Finite.lean 10 21 ['eric-wieser', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] mattrobball
assignee:mattrobball
1-73066
1 day ago
13-29888
13 days ago
79-79262
79 days
29713 jessealama
author:jessealama
feat (Algebra/Homology): add Euler–Poincaré formula This PR adds the Euler characteristic for chain complexes and proves the Euler-Poincaré formula relating the alternating sum of chain dimensions to the alternating sum of homology dimensions. ### Main definitions (in `EulerCharacteristic.lean`) * `ChainComplex.boundedEulerChar`: The Euler characteristic over a finite set * `ChainComplex.eulerChar`: The Euler characteristic as an infinite sum * `ChainComplex.homologyBoundedEulerChar`: The homological Euler characteristic over a finite set * `ChainComplex.homologyEulerChar`: The homological Euler characteristic as an infinite sum Both bounded and infinite definitions work with ℤ-indexed complexes over any ring R. The file also includes theorems relating the formally infinite sums to finite sums when there is finite support: * `ChainComplex.eulerChar_eq_boundedEulerChar`: The infinite Euler characteristic equals the bounded one when the chain complex vanishes outside a finite set * `ChainComplex.homologyEulerChar_eq_homologyBoundedEulerChar`: The infinite homological Euler characteristic equals the bounded one when homology vanishes outside a finite set ### Main result (in `EulerPoincare.lean`) * `ChainComplex.eulerChar_eq_homology_eulerChar`: For ℤ-indexed bounded chain complexes of finite-dimensional modules over a division ring, the alternating sum of chain dimensions equals the alternating sum of homology dimensions. --- Related to: #29639, #29643, #29646 new-contributor t-algebra
label:t-algebra$
444/0 Mathlib.lean,Mathlib/Algebra/Homology/EulerCharacteristic.lean,Mathlib/Algebra/Homology/EulerPoincare.lean 3 19 ['github-actions', 'jessealama', 'joelriou', 'kim-em'] dagurtomas
assignee:dagurtomas
1-73011
1 day ago
16-46797
16 days ago
17-56648
17 days
28162 EtienneC30
author:EtienneC30
feat: define positive semidefinite sesquilinear maps --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
34/0 Mathlib/LinearAlgebra/SesquilinearForm.lean 1 6 ['EtienneC30', 'github-actions', 'mathlib4-merge-conflict-bot', 'themathqueen'] nobody
1-68933
1 day ago
4-59590
4 days ago
15-21317
15 days
30119 Ruben-VandeVelde
author:Ruben-VandeVelde
feat: WithTop/Bot.mapD To replace Option.elim; working towards #27918 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 32/4 Mathlib/Order/Hom/WithTopBot.lean,Mathlib/Order/WithBot.lean 2 1 ['github-actions'] nobody
1-67626
1 day ago
1-67810
1 day ago
1-67855
1 day
28793 grunweg
author:grunweg
feat: smooth immersions Define smooth immersions between manifolds. We use a definition which allows for corners, infinite dimension and arbitrary fields. Future PRs will - prove that immersions are C^n (#28796), - prove another characterisation of immersions: f is immersed at x iff the differential df_x splits, i.e. is injective, has closed range and its image has a closed complement, and in particular that a map between finite-dimensional manifolds over a complete field is an immersion iff its differential is injective, - use this to prove that the product (#28853) and composition of immersions is an immersion, - use this theory to give more conceptual proofs of half of `Manifold/Instances/Icc.lean` (#29077) - define smooth embeddings and immersed and embedded smooth submanifolds --- - [x] depends on: #28701 Most of the above has been done at https://github.com/grunweg/mathlib4/tree/MR-define-immersions. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry awaiting-author 469/0 Mathlib.lean,Mathlib/Geometry/Manifold/IsImmersionEmbedding.lean,Mathlib/Geometry/Manifold/LocalSourceTargetProperty.lean,docs/references.bib 4 42 ['chrisflav', 'github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'sgouezel'] sgouezel
assignee:sgouezel
1-64931
1 day ago
1-64931
1 day ago
7-84139
7 days
26923 oliver-butterley
author:oliver-butterley
feat(Dynamics/BirkhoffSum): add the pointwise ergodic theorem (Birkhoff's) The Pointwise Ergodic Theorem, also known as Birkhoff's Ergodic Theorem. Co-authored-by: Lua Viana Reis - [x] depends on: #26074 - [x] depends on: #26807 - [x] depends on: #26810 - [x] depends on: #26840 - [x] depends on: #26842 - [x] depends on: #26848 - [x] depends on: #26851 - [x] depends on: #26852 - [x] depends on: #26853 - [x] depends on: #27008 - [x] depends on: #28901 Zulip: [PR thread](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2326923.20The.20pointwise.20ergodic.20theorem.20.28Birkhoff's.29/with/527835158) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-dynamics 401/0 Mathlib.lean,Mathlib/Dynamics/BirkhoffSum/Pointwise.lean 2 13 ['D-Thomine', 'github-actions', 'leanprover-community-bot-assistant', 'lua-vr', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] urkud
assignee:urkud
1-61910
1 day ago
38-80753
1 month ago
45-50223
45 days
26956 mariainesdff
author:mariainesdff
feat(RingTheory/DividedPowers/Basic): add divided power structure on pZp We construct a divided power structure on the ideal `(p) ⊆ ℤ_[p]`, given by the family of maps `fun n x ↦ x^n / n!`. Co-authored-by: @AntoineChambert-Loir --- - [x] depends on: #22322 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 237/0 Mathlib.lean,Mathlib/RingTheory/DividedPowers/Padic.lean 2 18 ['github-actions', 'loefflerd', 'mariainesdff', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] loefflerd and mattrobball
assignee:loefflerd assignee:mattrobball
1-58686
1 day ago
17-47909
17 days ago
74-80921
74 days
30123 erdOne
author:erdOne
feat(Topology): add `IsCompact.closure_eq_nhdsKer` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 11/0 Mathlib/Topology/Separation/Regular.lean 1 1 ['github-actions'] nobody
1-58465
1 day ago
1-58475
1 day ago
1-58511
1 day
30124 erdOne
author:erdOne
feat(RingTheory): `IsAdicComplete I R ↔ CompleteSpace R ∧ T2Space R` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology
label:t-algebra$
40/0 Mathlib/Order/Filter/Bases/Basic.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Topology.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Separation/Basic.lean 5 1 ['github-actions'] nobody
1-57412
1 day ago
1-57412
1 day ago
1-57518
1 day
27673 b-reinke
author:b-reinke
feat(GroupTheory/FreeGroup): add cyclic reduction of words This PR adds the definition of `reduceCyclically`. This function produces a subword of a word `w` by cancelling the first and last letters of `w` as long as possible. If `w` is reduced, the resulting word will be cyclically reduced. It is a part of a series of PR on the theory of cyclically reduced words. Upstreamed from the [EquationalTheories](https://github.com/teorth/equational_theories) project. - [x] depends on: #25966 - [x] depends on: #27672 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory 76/0 Mathlib/GroupTheory/FreeGroup/CyclicallyReduced.lean 1 6 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vlad902'] nobody
1-56525
1 day ago
2-71067
2 days ago
2-72380
2 days
27270 EtienneC30
author:EtienneC30
chore: turn WithLp into a structure Turn `WithLp` into a one field structure, as was suggested many times on Zulip and discussed here: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/defeq.20abuse.20in.20.60WithLp.60/near/526234806. Here is what this PR does: - The instances on `WithLp p α` which were defeq to those on `α` (algebraic instances, topology, uniformity, bornology) are now pulled back from `α` along `WithLp.equiv p α`. A few declarations are added to ease the process, such as versions of `WithLp.equiv` as a homeomorphism or a uniform isomorphism. - It introduces some definitions to equip `α × β` with the Lp distance, and similarly for `Π i, α i`. This is then used to define relevant instances on type synonyms, such as for matrix norms. - The PR fixes all the defeq abuses (which break obviously). --- - [x] depends on: #28469 - [x] depends on: #28470 - [x] depends on: #28471 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-analysis 624/408 Archive/Hairer.lean,Mathlib/Algebra/Module/ZLattice/Covolume.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/Calculus/FDeriv/WithLp.lean,Mathlib/Analysis/InnerProductSpace/LinearPMap.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/Positive.lean,Mathlib/Analysis/InnerProductSpace/ProdL2.lean,Mathlib/Analysis/InnerProductSpace/Spectrum.lean,Mathlib/Analysis/Matrix.lean,Mathlib/Analysis/Normed/Algebra/TrivSqZeroExt.lean,Mathlib/Analysis/Normed/Algebra/UnitizationL1.lean,Mathlib/Analysis/Normed/Lp/LpEquiv.lean,Mathlib/Analysis/Normed/Lp/MeasurableSpace.lean,Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/Normed/Lp/WithLp.lean,Mathlib/Analysis/Quaternion.lean,Mathlib/Analysis/RCLike/Inner.lean,Mathlib/Analysis/SpecialFunctions/Gaussian/FourierTransform.lean,Mathlib/Combinatorics/Additive/AP/Three/Behrend.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/CrossProduct.lean,Mathlib/Geometry/Manifold/Instances/Icc.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/LinearAlgebra/Matrix/Hermitian.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/LinearAlgebra/Matrix/Spectrum.lean,Mathlib/MeasureTheory/Measure/Haar/InnerProductSpace.lean,Mathlib/MeasureTheory/Measure/Haar/OfBasis.lean,Mathlib/MeasureTheory/Measure/Lebesgue/VolumeOfBalls.lean,Mathlib/MeasureTheory/SpecificCodomains/WithLp.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/Basic.lean,Mathlib/NumberTheory/NumberField/Ideal/Asymptotics.lean 33 46 ['EtienneC30', 'eric-wieser', 'github-actions', 'j-loreaux', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] j-loreaux
assignee:j-loreaux
1-56085
1 day ago
1-57726
1 day ago
49-63239
49 days
29935 ineol
author:ineol
fix: cache fails when Mathlib is a nightly dependency Cache should on check for the nightly-testing remote when it is run from the Mathlib root and not from a repo which depends on Mathlib. Fixes #28594 --- I don't know how to test this fix since it would need to be in a nightly release, but at least it is working when ran from from tip of master. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor CI 3/3 Cache/Requests.lean 1 3 ['github-actions', 'ineol', 'robin-carlier'] kim-em
assignee:kim-em
1-52070
1 day ago
1-52070
1 day ago
9-62715
9 days
29959 DavidLedvinka
author:DavidLedvinka
feat(Probability): existence of independent random variables with a given sequence of distributions In some sense none of these are necessary, especially `exists_hasLaw`, because one could just use the identity or the projections of the product explicitly, but I think using these lemmas when one wants to introduce random variables in probabilistic proofs will be much more natural. Also added needed `fun_prop` tags to `aemeasurable_id` lemmas which randomly generalized `charFun_map_smul` to not need `SecondCountableTopology` (detected by the linter). large-import t-measure-probability awaiting-author 37/5 Mathlib/MeasureTheory/Measure/CharacteristicFunction.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/Probability/HasLaw.lean 3 4 ['github-actions', 'mathlib4-merge-conflict-bot', 'sgouezel'] nobody
1-46720
1 day ago
1-46720
1 day ago
5-76048
5 days
29851 joelriou
author:joelriou
feat(CategoryTheory): limits of objects satisfying a property This PR dualises #29843. --- - [x] depends on: #29849 - [x] depends on: #29843 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 141/5 Mathlib.lean,Mathlib/CategoryTheory/ObjectProperty/ColimitsOfShape.lean,Mathlib/CategoryTheory/ObjectProperty/LimitsOfShape.lean 3 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-44620
1 day ago
5-44842
5 days ago
5-44821
5 days
27364 101damnations
author:101damnations
feat(RepresentationTheory/Homological/GroupCohomology): cohomology of finite cyclic groups Let `k` be a commutative ring, `G` a group and `A` a `k`-linear `G`-representation. Given endomorphisms `φ, ψ : A ⟶ A` such that `φ ∘ ψ = ψ ∘ φ = 0`. Denote by `Chains(A, φ, ψ)` the periodic chain complex `... ⟶ A --φ--> A --ψ--> A --φ--> A --ψ--> A ⟶ 0` and by `Cochains(A, φ, ψ)` the periodic cochain complex `0 ⟶ A --ψ--> A --φ--> A --ψ--> A --φ--> A ⟶ ...`. When `G` is finite and generated by `g : G`, then `P := Chains(k[G], N, ρ(g) - Id)` (with `ρ` the left regular representation) is a projective resolution of `k` as a trivial representation. In this PR we show that for `A : Rep k G`, `Hom(P, A)` is isomorphic to `Cochains(A, N, ρ_A(g) - Id)` as a complex of `k`-modules, and hence the cohomology of this complex computes group cohomology. --- - [x] depends on: #27362 - [x] depends on: #27361 - [x] depends on: #27363 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
142/1 Mathlib.lean,Mathlib/RepresentationTheory/Homological/FiniteCyclic.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/FiniteCyclic.lean 3 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-41089
1 day ago
1-41423
1 day ago
1-43993
1 day
27365 101damnations
author:101damnations
feat(RepresentationTheory/Homological/GroupHomology): homology of finite cyclic groups Let `k` be a commutative ring, `G` a group and `A` a `k`-linear `G`-representation. Given endomorphisms `φ, ψ : A ⟶ A` such that `φ ∘ ψ = ψ ∘ φ = 0`. Denote by `Chains(A, φ, ψ)` the periodic chain complex `... ⟶ A --φ--> A --ψ--> A --φ--> A --ψ--> A ⟶ 0`. When `G` is finite and generated by `g : G`, then `P := Chains(k[G], N, ρ(g) - Id)` (with `ρ` the left regular representation) is a projective resolution of `k` as a trivial representation. In this PR we show that for `A : Rep k G`, `(A ⊗ P)_G` is isomorphic to `Chains(A, N, ρ_A(g) - Id)` as a complex of `k`-modules, and hence the homology of this complex computes group homology. --- - [x] depends on: #27362 - [x] depends on: #27361 - [x] depends on: #27363 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
142/1 Mathlib.lean,Mathlib/RepresentationTheory/Homological/FiniteCyclic.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/FiniteCyclic.lean 3 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-41081
1 day ago
1-41309
1 day ago
1-43759
1 day
26975 Whysoserioushah
author:Whysoserioushah
feat: a norm_num extension for complex numbers co-authored-by : @thefundamentaltheor3m, @hrmacbeth --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 350/0 Mathlib.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/NormNum/NormNumI.lean,MathlibTest/norm_numI.lean 5 47 ['Whysoserioushah', 'dupuisf', 'eric-wieser', 'github-actions', 'hrmacbeth'] robertylewis
assignee:robertylewis
1-40320
1 day ago
78-32126
2 months ago
78-36437
78 days
30131 fpvandoorn
author:fpvandoorn
feat: alias_in attribute * A small wrapper for adding an alias of a declaration in another namespace. * application time `.afterCompilation` is necessary for `#eval` to work correctly * Docstrings are copied, jump-to-definition works (no test in the test file, but tested locally) * To be used for CW-complexes, where lemmas are frequently duplicated between `RelCWComplex` and `CWComplex`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) cc @scholzhannah t-meta 93/0 Mathlib.lean,Mathlib/Util/AliasIn.lean,MathlibTest/Util/AliasIn.lean 3 1 ['github-actions'] nobody
1-37987
1 day ago
1-37987
1 day ago
1-37968
1 day
30133 smmercuri
author:smmercuri
feat: `WithVal v` and `WithVal w` are isomorphic as uniform spaces when `v` and `w` are equivalent valuations --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 93/0 Mathlib/Algebra/Order/Hom/Ring.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 2 1 ['github-actions'] nobody
1-35815
1 day ago
1-35887
1 day ago
1-35866
1 day
25603 callesonne
author:callesonne
feat(Bicategory/InducedBicategory): add induced bicategories This PR adds a way of inducing a full bicategory structure on given type of objects with a map to the objects of some bicategory (i.e. with all 1-morphisms and all 2-morphisms). I have not tried to implement "locally induced bicategories" which should allow for a sub-class of 1-morphisms as well. This is because copying the naive approach and replacing the map `F` as for induced categories with a functor, one runs into issues when the equalities in `F.map_comp` and `F.map_id` are not defeq equalities. One could probably define locally full sub-bicategories using a pair of `ObjectProperty` + `MorphismProperty` to ensure that the inclusions are actually defeq, but I did not want to get into this. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 68/0 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/InducedBicategory.lean 2 5 ['callesonne', 'github-actions', 'robin-carlier'] robin-carlier
assignee:robin-carlier
1-35470
1 day ago
103-66615
3 months ago
13-48345
13 days
30135 erdOne
author:erdOne
feat(RingTheory): `ValuativeRel` on subrings --- @pechersky do we want this? [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 15/0 Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean 1 1 ['github-actions'] nobody
1-33487
1 day ago
1-33496
1 day ago
1-33532
1 day
28061 CoolRmal
author:CoolRmal
feat(MeasureTheory): Uniqueness of Measures in the Riesz–Markov–Kakutani Representation Theorem This PR adds the proof of the uniqueness of measures in the Riesz–Markov–Kakutani representation theorem (i.e. if two regular measures on a locally compact Hausdorff space induce the same linear functionals on the set of compactly supported continuous functions, then these two measures are equal). cf. https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Uniqueness.20in.20Riesz.E2.80.93Markov.E2.80.93Kakutani.20representation.20theorem --- - [ ] depends on: #28059 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed new-contributor t-measure-probability awaiting-author 236/18 Mathlib.lean,Mathlib/MeasureTheory/Function/EssSup.lean,Mathlib/MeasureTheory/Integral/RieszMarkovKakutani/Basic.lean,Mathlib/MeasureTheory/Integral/RieszMarkovKakutani/NNReal.lean,Mathlib/MeasureTheory/Integral/RieszMarkovKakutani/Real.lean,Mathlib/MeasureTheory/Measure/Regular.lean,Mathlib/Probability/Moments/IntegrableExpMul.lean,Mathlib/Probability/UniformOn.lean,Mathlib/Topology/ContinuousMap/CompactlySupported/Basic.lean,Mathlib/Topology/ContinuousMap/CompactlySupported/Integral.lean,Mathlib/Topology/UrysohnsLemma.lean 11 29 ['CoolRmal', 'EtienneC30', 'FormulaRabbit81', 'github-actions', 'j-loreaux', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] RemyDegenne
assignee:RemyDegenne
1-30794
1 day ago
1-30794
1 day ago
22-16948
22 days
30126 YaelDillies
author:YaelDillies
feat: characterise when `Set.rangeFactorization` is injective --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-author 4/0 Mathlib/Data/Set/Operations.lean 1 2 ['github-actions', 'plp127'] nobody
1-28985
1 day ago
1-28985
1 day ago
0-17414
4 hours
29270 euprunin
author:euprunin
chore: remove redundant `refine` invocations --- **Note:** Although technically redundant, some of these may be worth keeping for readability, or other reasons. Let me know if you think any should stay. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author 4/12 Mathlib/Algebra/Order/GroupWithZero/Lex.lean,Mathlib/Algebra/Polynomial/Smeval.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/Geometry/Manifold/LocalInvariantProperties.lean,Mathlib/Probability/Density.lean 5 8 ['github-actions', 'j-loreaux', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'sgouezel'] dupuisf
assignee:dupuisf
1-26184
1 day ago
1-26184
1 day ago
29-76762
29 days
30130 Bergschaf
author:Bergschaf
feat(GroupTheory/FreeGroup/Orbit): The orbit of a point generated by parts of a free group can be "duplicated" Applying `w⁻¹` to the orbit generated by all elements of a free group that start with `w` yields the orbit generated by all the words that start with every letter execpt `w⁻` (and the original point) The orbit of a point `x` generated by a set of group elements `s` defined as all the points that can be reached by applying the elements of `s` to `x`. A special case of this result is needed for the banach tarski theorem. --- I tried my best to shorten the proof of orbit.duplicate, but is quite long. There are some aspects that are duplicated due to case splits but I don't konw if it is possible to avoid that. I'd apprectiate some tips on that. And I'm not quite sure about the naming of the theorems and definitions, please let me know if you have other (better) ideas! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory 135/0 Mathlib.lean,Mathlib/GroupTheory/FreeGroup/Orbit.lean 2 1 ['github-actions'] nobody
1-25998
1 day ago
1-41206
1 day ago
1-41251
1 day
28488 euprunin
author:euprunin
chore(SetTheory): golf entire `cast_succ`, `mk_multiset_of_countable` and `iSup_succ` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory awaiting-author 6/11 Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Finsupp.lean,Mathlib/SetTheory/Ordinal/Family.lean 3 7 ['github-actions', 'mathlib4-merge-conflict-bot', 'vihdzp'] nobody
1-25841
1 day ago
2-31796
2 days ago
13-23224
13 days
29833 vlad902
author:vlad902
feat(Set): helper lemmas about set cardinality A few lemmas I needed in formalizing Dilworth's theorem and vertex covers. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 22/0 Mathlib/Data/Set/Card.lean 1 11 ['Ruben-VandeVelde', 'github-actions', 'j-loreaux', 'themathqueen', 'vlad902'] nobody
1-23776
1 day ago
1-26404
1 day ago
13-55482
13 days
30141 shalliso
author:shalliso
fix(Topology/Baire/Lemmas): fix index type in isMeagre_iUnion The index set ι needs to be of type Sort* instead of type Type* in isMeagre_iUnion otherwise I get the following message when I try to use it: typeclass instance problem is stuck, it is often due to metavariables Countable ?m.27 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology 1/1 Mathlib/Topology/GDelta/Basic.lean 1 1 ['github-actions'] nobody
1-20718
1 day ago
1-20731
1 day ago
1-20768
1 day
30071 Jlh18
author:Jlh18
feat: dualize Pseudofunctor.CoGrothendieck results to Pseudofunctor.Grothendieck Continuing from #29681, dualize all definitions and lemmas in the namespace `Pseudofunctor.CoGrothendieck` to results in the namespace `Pseudofunctor.Grothendieck`. - [ ] depends on: #29681 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 121/9 Mathlib/CategoryTheory/Bicategory/Grothendieck.lean 1 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-18779
1 day ago
2-27141
2 days ago
2-37649
2 days
30140 chrisflav
author:chrisflav
feat(AlgebraicGeometry): locally directed colimits in `P.Over ⊤ S` We lift the colimit properties of `Scheme` to `P.Over ⊤ S` if `IsLocalAtSource P`. In particular, `P.Over ⊤ S` has pushouts along open immersions and (small) coproducts. We also add two instances, that make ``` example [IsLocalAtSource P] {U X Y : Scheme.{u}} (f : U ⟶ X) (g : U ⟶ Y) [IsOpenImmersion f] [IsOpenImmersion g] : HasPushout f g := inferInstance ``` work. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry 164/0 Mathlib.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/AlgebraicGeometry/LimitsOver.lean,Mathlib/CategoryTheory/Limits/MorphismProperty.lean,Mathlib/CategoryTheory/MorphismProperty/Comma.lean 5 1 ['github-actions'] nobody
1-18617
1 day ago
1-21915
1 day ago
1-21895
1 day
30142 shalliso
author:shalliso
feat(Topology/Baire): define IsNonMeagre non-meagre sets (also known as "of the second category") are worthy of their own definition and API. This was useful to me for formalizing a result of "automatic continuity", that is, a Baire-measurable homomorphism between Polish groups must be continuous. Simply working with the negation of IsMeagre quickly became cumbersome, and non-meagre sets have an important role in the study of Polish (e.g. locally compact) groups. From https://github.com/shalliso/automatic_continuity [ ] depends on: #30141 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology 83/1 Mathlib/Topology/Baire/NonMeagre.lean,Mathlib/Topology/GDelta/Basic.lean 2 1 ['github-actions'] nobody
1-18384
1 day ago
1-18386
1 day ago
1-18429
1 day
30143 Jlh18
author:Jlh18
feat(CategoryTheory/Adjunction/PartialAdjunction): add symm naturality lemmas for HomEquiv and lift functor Add two lemmas for `partialRightAdjointHomEquiv` to help work with `partialRightAdjointHomEquiv.symm`. Add a definition `Functor.PartialRightAdjointSource.lift` to help with defining functors into the category `PartialRightAdjointSource`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 369/0 3,Mathlib/CategoryTheory/Adjunction/PartialAdjoint.lean 2 1 ['github-actions'] nobody
1-17578
1 day ago
1-17756
1 day ago
1-17799
1 day
30139 janemms
author:janemms
feat(Topology/Metrizable): embed a countably separated space inside a space of sequences Add lemma on metrizability of a compact space with a sequence of continuous functions to metric spaces separating points on it. This result is needed for proving the sequential Banach-Alaoglu theorem, which is to be pull requested next. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology 236/0 Mathlib.lean,Mathlib/Topology/Metrizable/CountableSeparating.lean 2 2 ['github-actions', 'themathqueen'] nobody
1-16899
1 day ago
1-23635
1 day ago
1-23673
1 day
30030 JonBannon
author:JonBannon
feat(MeasureTheory): add `MemLp.Const` class and instances to unify `p = ∞` and `μ.IsFiniteMeasure` cases Although it is possible to ensure that, for example, the `One` instances for `p=∞` and `μ.IsFiniteMeasure` are defeq, introducing an `MemLp.Const` typeclass removes the need to unfold extensively to check this definitional equality, improving performance. cf. https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Lp.20constant.20function.20issue/with/537563137 This PR introduces the requisite class and associated instances. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 85/55 Mathlib/MeasureTheory/Function/ContinuousMapDense.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/Indicator.lean 6 13 ['JonBannon', 'github-actions', 'j-loreaux'] nobody
1-15522
1 day ago
4-8329
4 days ago
6-14787
6 days
30079 dagurtomas
author:dagurtomas
feat(CategoryTheory): IsSheafFor as a multiequalizer condition --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory WIP 112/0 Mathlib/CategoryTheory/Sites/Multifork.lean 1 3 ['chrisflav', 'github-actions', 'joelriou'] nobody
1-14548
1 day ago
3-79696
3 days ago
0-1
1 second
27262 Timeroot
author:Timeroot
feat(Tactic/Bound): bound? for proof scripts --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author 24/9 Mathlib/Tactic/Bound.lean 1 10 ['JovanGerb', 'Timeroot', 'github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot'] nobody
1-10856
1 day ago
1-10856
1 day ago
69-47369
69 days
29728 ADA-Projects
author:ADA-Projects
feat(Topology/KrullDimension): add subspace dimension inequality This PR extends topological Krull dimension theory with basic results about subspaces. - Add mapIrreducibleClosed function for canonical maps between irreducible closed sets - Prove injectivity and strict monotonicity of these maps - Establish partial order structure on IrreducibleCloseds - Prove topKrullDim_subspace_le theorem showing dim(Y) ≤ dim(X) for subspaces **Update (per reviewer feedback):** Reorganized code structure as requested: - Moved `IrreducibleCloseds` extensions from `KrullDimension.lean` to `Sets/Closeds.lean` - This includes `PartialOrder` instance, `map` functions, and embedding lemmas - Better modularity: other files can now use `IrreducibleCloseds` without importing Krull dimension theory The main result `topologicalKrullDim_subspace_le` remains the same - any subspace Y has dim(Y) ≤ dim(X). Some sections of this code (and documentation) were generated with the help of Gemini. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology 146/20 Mathlib/Topology/KrullDimension.lean,Mathlib/Topology/Sets/Closeds.lean 2 9 ['ADA-Projects', 'fpvandoorn', 'github-actions', 'kim-em'] PatrickMassot
assignee:PatrickMassot
1-8008
1 day ago
8-63848
8 days ago
8-80570
8 days
29743 loefflerd
author:loefflerd
feat(Topology/Algebra): discrete iff finite index subgroup discrete Show that if G is a topological group and H is a finite-index subgroup, then H is discrete iff G is. --- - [x] depends on: #29648 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 153/9 Mathlib.lean,Mathlib/Data/Set/Constructions.lean,Mathlib/Topology/Algebra/ContinuousMonoidHom.lean,Mathlib/Topology/Algebra/IsUniformGroup/DiscreteSubgroup.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/DiscreteSubset.lean 6 8 ['Ruben-VandeVelde', 'github-actions', 'loefflerd', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] j-loreaux
assignee:j-loreaux
1-8007
1 day ago
8-43922
8 days ago
10-84256
10 days
29954 kckennylau
author:kckennylau
feat(RingTheory): an algebra that is an invertible module is isomorphic to the base ring This PR considers the case where we have an `R`-algebra `A` which is also an invertible `R`-module, then constructs an isomorphism between `R` and `A` as `R`-algebras: ```lean variable (R A : Type*) [CommSemiring R] [Semiring A] [Algebra R A] [Module.Invertible R A] def algEquivOfRing : R ≃ₐ[R] A := ``` --- Zulip: https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/an.20algebra.20that.20is.20module-invertible.20is.20the.20base.20ring/with/541351797 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
90/0 Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/RingTheory/PicardGroup.lean 2 1 ['github-actions'] ocfnash
assignee:ocfnash
1-8003
1 day ago
8-44374
8 days ago
9-3962
9 days
29957 urkud
author:urkud
feat(NormedSpace/Alternating/Uncurry/Fin): new file --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 231/32 Mathlib.lean,Mathlib/Analysis/NormedSpace/Alternating/Uncurry/Fin.lean,Mathlib/LinearAlgebra/Alternating/Uncurry/Fin.lean 3 12 ['PatrickMassot', 'github-actions', 'urkud'] hrmacbeth
assignee:hrmacbeth
1-8002
1 day ago
8-77857
8 days ago
8-77894
8 days
29964 Vierkantor
author:Vierkantor
feat(TacticAnalysis): check if we are in a `try`/`anyGoals` context This PR adds a check if the tactic is being run in a `try` or `anyGoals` call, so that we do not add a warning for the original tactic failing in this context. This was the source of a few "original tactic failed" in the `grind` regression reports. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 71/31 Mathlib/Tactic/TacticAnalysis.lean,Mathlib/Tactic/TacticAnalysis/Declarations.lean,MathlibTest/TacticAnalysis.lean 3 1 ['github-actions'] adamtopaz
assignee:adamtopaz
1-8001
1 day ago
8-66797
8 days ago
8-66778
8 days
29967 kim-em
author:kim-em
chore: fix longest pole utilities, and verify in CI We should consider outright deleting these. The fact that they were broken is good evidence they haven't been used recently. Sebastian also has a good replacement available (that is aware of the module system), although I'm not sure it's deployed yet. CI 26/22 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,LongestPole/Main.lean,LongestPole/Unused.lean 6 2 ['bryangingechen', 'github-actions'] bryangingechen
assignee:bryangingechen
1-8000
1 day ago
8-58002
8 days ago
8-58041
8 days
29976 AntoineChambert-Loir
author:AntoineChambert-Loir
feat(Topology/Semicontinuous): lower bounds on compact sets Prove that lower semicontinuous functions attain their lower bound on nonempty compact sets, and the analogous lemma for upper semicontinuous functions. By the way, add several basic results for semicontinuous functions, relating the WithinAt, At, On versions. Co-authored with @ADedecker --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 300/1 Mathlib/Order/Filter/Extr.lean,Mathlib/Topology/Semicontinuous.lean 2 1 ['github-actions'] TwoFX
assignee:TwoFX
1-7998
1 day ago
8-27363
8 days ago
8-27342
8 days
30138 fgdorais
author:fgdorais
chore: adaptations for batteries#1441 --- After [batteries#1441](https://github.com/leanprover-community/batteries/pull/1441) is merged: - [ ] Edit the lakefile to point to `leanprover-community/batteries:main` - [ ] Run `lake update batteries` - [ ] Merge `leanprover-community/mathlib4:master` - [ ] Wait for CI and merge [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-batt-PR 18/34 Mathlib/Data/Nat/Bitwise.lean,Mathlib/SetTheory/Nimber/Basic.lean,lake-manifest.json,lakefile.lean 4 1 ['github-actions'] nobody
1-7020
1 day ago
1-23427
1 day ago
0-31
31 seconds
29866 euprunin
author:euprunin
chore(Topology/ContinuousMap): golf 30 lines from `exists_add_nnrealPart_add_eq` using `grind` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-author 1/31 Mathlib/Topology/ContinuousMap/CompactlySupported.lean 1 5 ['JovanGerb', 'github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] j-loreaux
assignee:j-loreaux
1-3839
1 day ago
1-3839
1 day ago
11-30512
11 days
26219 Thmoas-Guan
author:Thmoas-Guan
feat(RingTheory/KrullDimension): Krull Dimension of quotient regular sequence We show that if M is a finite module over a Noetherian local ring R, [r₁, …, rₙ] is an M-sequence, then dim M⧸(r₁, …, rₙ)M + n = dim M. Co-authored-by: Yongle Hu @mbkybky --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 225/15 Mathlib.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Localization.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/KrullDimension/Module.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/MaximalIdeal/Basic.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Support.lean 9 n/a ['Thmoas-Guan', 'chrisflav', 'github-actions', 'leanprover-community-bot-assistant', 'mbkybky'] chrisflav
assignee:chrisflav
1-3832
1 day ago
unknown
unknown
26210 Thmoas-Guan
author:Thmoas-Guan
feat(RingTheory): associated primes of localized module We prove that `Ass(S^{-1}M)` is equal to the preimage of `Ass(M)` under `Ideal.comap` if the base ring is Noetherian. From this we conclude that every minimal prime over `Module.annihilator R M` is in `Ass(M)` when `M` is finitely generated. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import awaiting-author 85/22 Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Regular/Depth.lean 2 30 ['Thmoas-Guan', 'chrisflav', 'github-actions', 'mathlib4-merge-conflict-bot', 'mbkybky'] chrisflav
assignee:chrisflav
1-3780
1 day ago
39-1526
1 month ago
36-71207
36 days
28599 Thmoas-Guan
author:Thmoas-Guan
feat(RingTheory) : polynomial over CM ring is CM polynomial over Cohen Macaulay ring is Cohen Macaulay --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import WIP 2577/57 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Polynomial.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Localization.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/KrullDimension/Module.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/MaximalIdeal/Basic.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/Support.lean 21 n/a ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
1-3416
1 day ago
unknown
unknown
28241 alreadydone
author:alreadydone
chore(Data): `SetLike Finset` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 56/65 Counterexamples/AharoniKorman.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/Algebra/Squarefree/Basic.lean,Mathlib/Combinatorics/Additive/RuzsaCovering.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/WalkCounting.lean,Mathlib/Data/DFinsupp/Defs.lean,Mathlib/Data/Finset/Attach.lean,Mathlib/Data/Finset/Defs.lean,Mathlib/Data/Finset/Insert.lean,Mathlib/Data/Finset/Union.lean,Mathlib/FieldTheory/Finite/GaloisField.lean,Mathlib/FieldTheory/Perfect.lean,Mathlib/GroupTheory/Perm/Centralizer.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/LinearAlgebra/Finsupp/Supported.lean,Mathlib/LinearAlgebra/LinearIndependent/Basic.lean,Mathlib/LinearAlgebra/LinearIndependent/Defs.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/Order/CountableDenseLinearOrder.lean,Mathlib/Probability/Independence/Kernel.lean,Mathlib/RingTheory/Ideal/Quotient/Index.lean,Mathlib/RingTheory/IntegralClosure/IsIntegral/Basic.lean,Mathlib/RingTheory/Spectrum/Prime/Polynomial.lean,Mathlib/Topology/Separation/Basic.lean 27 5 ['alreadydone', 'github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot'] nobody
1-3074
1 day ago
1-3074
1 day ago
33-76448
33 days
28682 Thmoas-Guan
author:Thmoas-Guan
feat(RingTheory): definition of regular local ring In this PR, we give the definition of regular local ring. The class `IsRegularLocalRing` is defined as `(maximalIdeal R).spanFinrank = ringKrullDim R` We also established the lemma `IsRegularLocalRing.iff_finrank_cotangentSpace` proving this definition is equivalent to the cotangent space version. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author 117/0 Mathlib.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean 2 35 ['Thmoas-Guan', 'chrisflav', 'github-actions', 'mbkybky'] chrisflav
assignee:chrisflav
1-2799
1 day ago
42-77203
1 month ago
1-63449
1 day
29558 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra): definition of global dimension In this PR, we define projective dimension and global dimension using `CategoryTheory.HasProjectiveDimensionLT` --- - [ ] depends on: #29882 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 212/0 Mathlib.lean,Mathlib/RingTheory/GlobalDimension.lean 2 7 ['Thmoas-Guan', 'erdOne', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] erdOne
assignee:erdOne
1-1639
1 day ago
9-52136
9 days ago
10-54394
10 days
30148 mbkybky
author:mbkybky
chore(RingTheory/Spectrum/Prime/Module): golf `stableUnderSpecialization_support` using `mem_support_mono` Golf [Module.stableUnderSpecialization_support](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/Spectrum/Prime/Module.html#Module.stableUnderSpecialization_support) using [Module.mem_support_mono](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/Support.html#Module.mem_support_mono). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 2/6 Mathlib/RingTheory/Spectrum/Prime/Module.lean 1 1 ['github-actions'] nobody
0-85694
23 hours ago
0-85707
23 hours ago
0-85745
23 hours
28484 euprunin
author:euprunin
chore(Data): golf entire `toReal_eq_toReal`, `count_eq_of_nodup` and `smul_mat_cons` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data maintainer-merge 6/11 Mathlib/Data/ENNReal/Real.lean,Mathlib/Data/List/Nodup.lean,Mathlib/LinearAlgebra/Matrix/Notation.lean 3 11 ['bryangingechen', 'github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot', 'pechersky', 'qawbecrdtey'] pechersky
assignee:pechersky
0-81207
22 hours ago
1-5098
1 day ago
48-80807
48 days
30003 vlad902
author:vlad902
feat(Order): helper lemmas for `IsChain`/`IsAntichain` These were useful in formalizing Dilworth's theorem. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 16/0 Mathlib/Order/Antichain.lean,Mathlib/Order/Preorder/Chain.lean 2 6 ['github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vlad902'] nobody
0-75465
20 hours ago
0-75494
20 hours ago
7-31839
7 days
29835 vlad902
author:vlad902
feat(Order): add `IsMaxAntichain` and some lemmas for `IsMaxChain` Define `IsMaxAntichain` to be the antichain analogue of `IsMaxChain` and add some useful lemmas to both that I needed for proving Mirsky's theorem. - [ ] depends on: #29834 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 51/0 Mathlib/Order/Antichain.lean,Mathlib/Order/Preorder/Chain.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-75002
20 hours ago
1-24702
1 day ago
1-25030
1 day
30136 vlad902
author:vlad902
feat(SimpleGraph): lemmas characterizing graphs that are not complete/empty Two helper lemmas that I've found useful in several other PRs that characterize graphs that are neither complete nor empty. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 8/0 Mathlib/Combinatorics/SimpleGraph/Basic.lean 1 1 ['github-actions'] nobody
0-74228
20 hours ago
1-27319
1 day ago
1-27358
1 day
27207 pechersky
author:pechersky
feat(Topology/WithVal): ValuativeRel (WithVal v) with a helper valuation defined that does not pierce defeq --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology
label:t-algebra$
20/1 Mathlib/Topology/Algebra/Valued/WithVal.lean 1 8 ['alreadydone', 'github-actions', 'mathlib4-merge-conflict-bot', 'pechersky', 'smmercuri'] alreadydone
assignee:alreadydone
0-72436
20 hours ago
40-1037
1 month ago
73-53713
73 days
30059 AntoineChambert-Loir
author:AntoineChambert-Loir
feat(Mathlib/Algebra/QuadraticAlgebra): norm, star structure on quadratic alg. Define the norm and the star structure on a quadratic algebra. Application to the units and the zero divisors. The file `Mathlib.Algebra.QuadraticAlgebra.lean` has been renamed to `Mathlib.Algebra.QuadraticAlgebra/Defs.lean`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
416/1 Mathlib.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/QuadraticAlgebra.lean,Mathlib/Algebra/QuadraticAlgebra/Basic.lean 4 29 ['AntoineChambert-Loir', 'eric-wieser', 'github-actions', 'j-loreaux'] riccardobrasca
assignee:riccardobrasca
0-71216
19 hours ago
1-14555
1 day ago
5-6317
5 days
30069 IvanRenison
author:IvanRenison
feat(Combinatorics/SimpleGraph): add lemma `IsTree.dist_ne_of_adj` and necessary lemmas This contribution was created as part of the Utrecht Summerschool "Formalizing Mathematics in Lean" in July 2025. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 34/0 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 7 ['github-actions', 'themathqueen', 'vlad902'] nobody
0-68100
18 hours ago
4-41195
4 days ago
4-46949
4 days
30103 kebekus
author:kebekus
feat: first main theorem of value distribution theory Establish the first main theorem of value distribution theory in full. This PR completes a major milestone in [Project VD](https://github.com/kebekus/ProjectVD), which aims to formalize Value Distribution Theory for meromorphic functions on the complex plane. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-analysis awaiting-author 71/7 Mathlib/Analysis/Complex/ValueDistribution/FirstMainTheorem.lean,docs/overview.yaml 2 6 ['github-actions', 'grunweg', 'kebekus', 'sgouezel'] nobody
0-65095
18 hours ago
0-65392
18 hours ago
2-8406
2 days
30023 jeremypparker
author:jeremypparker
feat(Analysis/Fourier): Parseval for FourierCoeffOn `tsum_sq_fourierCoeffOn` proved via the existing `tsum_sq_fourierCoeff`. The lemmas I needed, particularly `memLp_liftIoc_of_memLp` which shows that the lift of an Lp function on the interval is Lp on AddCircle, turned out to be much messier than I anticipated. Hopefully someone can suggest improvements. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis awaiting-author 91/14 Mathlib/Analysis/Fourier/AddCircle.lean,Mathlib/Topology/Instances/AddCircle/Defs.lean 2 6 ['github-actions', 'j-loreaux', 'jeremypparker'] j-loreaux
assignee:j-loreaux
0-64464
17 hours ago
1-19067
1 day ago
5-40103
5 days
30120 FernandoChu
author:FernandoChu
feat(CategoryTheory): Pullback of equalizer is an equalizer We show that the pullback of an equalizer (seen as a subobject) along some morphism `h` is the subobject that comes from the equalizer of the two original arrows precomposed with `h`. A `TODO` was completed in the process. This is a prerequisite of the [MTT project](https://github.com/kyoDralliam/model-theory-topos), which aims to use the internal language of toposes to reason about e.g. sheaves. large-import t-category-theory 112/2 Mathlib/CategoryTheory/Limits/Shapes/Equalizers.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/PullbackCone.lean,Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/CategoryTheory/Subobject/FactorThru.lean,Mathlib/CategoryTheory/Subobject/Limits.lean 5 3 ['FernandoChu', 'github-actions', 'joelriou'] nobody
0-61393
17 hours ago
0-61393
17 hours ago
0-67034
18 hours
30152 YaelDillies
author:YaelDillies
feat(Filter): a finite set is eventually a subset of any exhaustion This will be used to prove a sort of compactness result for finite minors of a graph. From the ProofBench workshop --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 4/0 Mathlib/Order/Filter/Finite.lean 1 2 ['github-actions', 'kckennylau'] nobody
0-60658
16 hours ago
0-70716
19 hours ago
0-70713
19 hours
30113 vlad902
author:vlad902
feat(Order): generalize `Finset.exists_maximalFor` to transitive orders Currently `exists_maximalFor` and it's related analogs are only defined for Preorders. I generalize the results where it is possible to do so to transitive relations without requiring reflexivity. This was necessary for work where I needed to work with < and find maximums. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 23/5 Mathlib/Order/Basic.lean,Mathlib/Order/Preorder/Finite.lean 2 4 ['YaelDillies', 'github-actions', 'vlad902'] nobody
0-60458
16 hours ago
2-46587
2 days ago
2-46627
2 days
30158 nicolaviolette
author:nicolaviolette
feat: combinatorics simplegraph basic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 9/4 Mathlib/Combinatorics/SimpleGraph/Basic.lean 1 1 ['github-actions'] nobody
0-60142
16 hours ago
0-60150
16 hours ago
0-60187
16 hours
30111 sgouezel
author:sgouezel
feat: composing a continuous multilinear map with continuous linear maps is analytic in both variables --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge t-analysis 133/0 Mathlib/Analysis/Analytic/CPolynomial.lean,Mathlib/Analysis/NormedSpace/Multilinear/Basic.lean 2 15 ['github-actions', 'loefflerd', 'sgouezel'] nobody
0-59746
16 hours ago
0-59746
16 hours ago
1-2916
1 day
30121 idontgetoutmuch
author:idontgetoutmuch
Principal fiber bundle core A structure capturing what it means to be a principal fibre bundle. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-differential-geometry 227/0 Mathlib.lean,Mathlib/Geometry/Manifold/PrincipalFiberBundle/PrincipalGBundle.lean 2 5 ['github-actions', 'grunweg'] nobody
0-59090
16 hours ago
0-72064
20 hours ago
1-65019
1 day
30034 yonggyuchoimath
author:yonggyuchoimath
feat(Mathlib/AlgebraicGeometry/AffineScheme): add preservation of limits of affine schemes This PR adds simple results about affine schemes. Main changes: * `forgetToSchemeCreatesLimits`: The forgetful functor `AffineScheme ⥤ Scheme` creates small limits. * `forgetToSchemeCreatesColimits`: The dual statement * (written by @erdOne) `preservesLimit_rightOp_Γ`: Shows that `Scheme.Γ.rightOp : Scheme ⥤ CommRingCatᵒᵖ` preserves limits of diagrams consisting of affine schemes. * `preservesColimit_Γ`: The dual statement. This PR reopens #30015, which was acidentally closed by myself. --- - [ ] depends on: #30014 33/0 Mathlib/AlgebraicGeometry/AffineScheme.lean 1 16 ['erdOne', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'yonggyuchoimath'] nobody
0-56472
15 hours ago
5-40321
5 days ago
5-49914
5 days
30149 NotWearingPants
author:NotWearingPants
feat(Combinatorics/SimpleGraph/Hamiltonian): `p.support.get` and `p.getVert` define equivalences with `Fin` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 38/2 Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Walk.lean,Mathlib/Data/List/NodupEquivFin.lean 3 1 ['github-actions'] nobody
0-56266
15 hours ago
0-84573
23 hours ago
0-84560
23 hours
29734 bwangpj
author:bwangpj
feat(Probability/Kernel): \phi-irreducibility of kernels Define powers of kernels, the Chapman-Kolmogorov equations, as well as \phi-irreducibility of kernels, following Robert-Casella, "Monte Carlo Statistical Methods", Definition 6.13. Co-authored-by: Matteo Cipollina @or4nge19 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 160/8 Mathlib.lean,Mathlib/Probability/Kernel/Composition/Comp.lean,Mathlib/Probability/Kernel/Composition/CompMap.lean,Mathlib/Probability/Kernel/Irreducible.lean,docs/references.bib 5 6 ['RemyDegenne', 'bwangpj', 'github-actions'] RemyDegenne
assignee:RemyDegenne
0-53937
14 hours ago
10-43095
10 days ago
16-82135
16 days
27021 grunweg
author:grunweg
feat: custom elaborators for differential geometry Add two sets of custom elaborators for differential geometry, to - infer the model with corners in `MDifferentiable{WithinAt,At,On}` or `ContMDiff{WithinAt,At,On}` expressions from the local context, and provide shorter notation in that setting - do the same for mfderiv: `mfderiv% f` is shorthand for `mfderiv I J f`; `mfderiv[s] f x` is short for `mfderivWithin I J f s` - convert a fibre bundle section from a dependent section to a function into the total space, making working with differentiability of sections of fibre bundles less cumbersome This was [discussed on zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Differential.20geometry.20elaborators.20experiment/with/528035295), to overall broad consensus. This code has substantial tests, and been partially reviewed by `fpvandoorn` (in person). It has been tested in the branch in #26221 (uncovering minor issues, but not substantial ones --- the worst of which have been fixed). The implementation itself is of prototype quality and will be cleaned up in the future. Once it is more robust, more differential geometry files can be converted to use it. From the path towards geodesics and the Levi-Civita connection. Co-authored-by: Patrick Massot ----------- I agree that merging not fully polished code is not ideal, but propose doing so for two reasons: - the work in #26221 used these elaborators extensively (to test them). Reverting those changes, merging the code, only to re-apply them is not a good use of time. Merging this PR now enables merging the work in #26221 soon. - the feature is clearly useful and not going away: in the files that use it, it works well already. Holding off on further adopting, but merging it now seems like a good compromise. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry t-meta 1360/1 Mathlib.lean,Mathlib/Geometry/Manifold/Elaborators.lean,Mathlib/Geometry/Manifold/Traces.lean,Mathlib/Lean/Elab/Term.lean,Mathlib/Lean/Expr/Basic.lean,MathlibTest/DifferentialGeometry/Elaborators.lean,scripts/noshake.json 7 35 ['adamtopaz', 'github-actions', 'grunweg', 'sgouezel'] robertylewis
assignee:robertylewis
0-52408
14 hours ago
3-63174
3 days ago
83-16409
83 days
27443 yuanyi-350
author:yuanyi-350
doc: Stacks tags --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-analysis
label:t-algebra$
6/3 Mathlib/Analysis/NormedSpace/HahnBanach/Separation.lean,Mathlib/RingTheory/Adjoin/Tower.lean,Mathlib/RingTheory/Localization/AtPrime/Basic.lean,Mathlib/RingTheory/Noetherian/Basic.lean 4 9 ['YaelDillies', 'github-actions', 'kbuzzard', 'kckennylau', 'mathlib4-merge-conflict-bot', 'yuanyi-350'] nobody
0-51353
14 hours ago
0-61696
17 hours ago
0-62977
17 hours
27465 erdOne
author:erdOne
feat: the definition of nonarchimedean local fields --- - [x] depends on: #27430 - [x] depends on: #27412 - [x] depends on: #27213 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge t-number-theory 214/25 Mathlib.lean,Mathlib/NumberTheory/LocalField/Basic.lean,Mathlib/RingTheory/Valuation/RankOne.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 5 61 ['erdOne', 'faenuccio', 'github-actions', 'kbuzzard', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky', 'riccardobrasca'] tb65536
assignee:tb65536
0-50956
14 hours ago
1-60246
1 day ago
14-71314
14 days
29447 j-loreaux
author:j-loreaux
chore(Analysis/NormedSpace/HahnBanach): move and split files This moves or splits the files in `Analysis/NormedSpace/HahnBanach/` accordingly: - `Separation` → `Analysis/LocallyConvex/Separation` - `Extension` → `Analysis/Normed/Module/HahnBanach/Extension` - `SeparatingDual`: split, mostly in `Analysis/LocallyConvex/SeparatingDual`, but a few completeness results are sent to `Analysis/Normed/Module/HahnBanach/Completeness`. The split allows us to significantly reduce the imports of `SeparatingDual`, albeit with a new proof that a normed space over `RCLike 𝕜` has a separating dual. Here we use the geometric Hahn-Banach theorem instead of the analytic one. This is part of #28698 to migrate the material in `Analysis/NormedSpace/` to other locations. --- - [ ] depends on: #29445 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed 102/77 Counterexamples/Phillips.lean,Mathlib.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Integral.lean,Mathlib/Analysis/Calculus/ParametricIntegral.lean,Mathlib/Analysis/Convex/Cone/Dual.lean,Mathlib/Analysis/Convex/KreinMilman.lean,Mathlib/Analysis/LocallyConvex/SeparatingDual.lean,Mathlib/Analysis/LocallyConvex/Separation.lean,Mathlib/Analysis/LocallyConvex/WeakOperatorTopology.lean,Mathlib/Analysis/LocallyConvex/WeakSpace.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Analysis/Normed/Module/HahnBanach/Completeness.lean,Mathlib/Analysis/Normed/Module/HahnBanach/Extension.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Integral/Bochner/ContinuousLinearMap.lean,Mathlib/MeasureTheory/Measure/FiniteMeasure.lean 17 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-50101
13 hours ago
0-50937
14 hours ago
2-30450
2 days
30163 NotWearingPants
author:NotWearingPants
feat(Data/Set/Lattice): useful equivalences of `biUnion` and `biInter` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 25/0 Mathlib/Data/Set/Lattice.lean 1 1 ['github-actions'] nobody
0-49256
13 hours ago
0-49256
13 hours ago
0-49309
13 hours
27400 dleijnse
author:dleijnse
feat: define geometrically reduced algebras Define geometrically reduced algebras, and prove that if all finitely generated subalgebras of an algebra `A` are geometrically reduced, then `A` is geometrically reduced. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra
label:t-algebra$
117/0 Mathlib.lean,Mathlib/RingTheory/Adjoin/FG.lean,Mathlib/RingTheory/Flat/Basic.lean,Mathlib/RingTheory/Nilpotent/Defs.lean,Mathlib/RingTheory/Nilpotent/GeometricallyReduced.lean,Mathlib/RingTheory/TensorProduct/Basic.lean 6 72 ['dleijnse', 'github-actions', 'joelriou', 'kckennylau'] joelriou
assignee:joelriou
0-48361
13 hours ago
0-48398
13 hours ago
67-60212
67 days
26588 faenuccio
author:faenuccio
feat(Algebra/GroupWithZero/WithZero): add the multiplicative embedding with zero from the range We extend the embedding of the range of a `MonoidWithZeroHom` to the codomain by enriching it with the structure of an ordered, multiplicative embedding. In passing, we extend some results about the embedding of `WithZero` of the units of a group with zero, to the group itself. Co-authored by: María Inés de Frutos Fernández @mariainesdff --- - [x] depends on: #29594 - [x] depends on: #29644 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order t-algebra
label:t-algebra$
111/3 Mathlib.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/Algebra/Order/GroupWithZero/Range.lean,Mathlib/Algebra/Order/GroupWithZero/WithZero.lean 4 74 ['YaelDillies', 'eric-wieser', 'faenuccio', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] YaelDillies
assignee:YaelDillies
0-47869
13 hours ago
10-34087
10 days ago
29-83366
29 days
28676 sun123zxy
author:sun123zxy
feat(NumberTheory/ArithmeticFunction): wrap `Nat.totient` as an `ArithmeticFunction` This wraps the Euler's totient function `Nat.totient` into a new `ArithmeticFunction` `ϕ`, with some basic identities such as `ϕ * ζ = id` and `μ * id = ϕ.` --- We use the notation `ϕ` to distinguish from `Nat.totient`'s notation `φ`, however this might be controversial. Suggestions are welcome! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-number-theory 45/5 Mathlib/NumberTheory/ArithmeticFunction.lean 1 13 ['MichaelStollBayreuth', 'NotWearingPants', 'b-mehta', 'eric-wieser', 'github-actions', 'sun123zxy'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
0-47321
13 hours ago
44-81569
1 month ago
44-82534
44 days
30159 joelriou
author:joelriou
chore: make Opposite.small an instance If `X` is small, so is `Xᵒᵖ`. It no longer seems to be dangerous to have such an instance. (Which shall be convenient for #30160.) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data t-category-theory easy 2/3 Mathlib/Data/Opposite.lean 1 5 ['github-actions', 'joelriou', 'leanprover-bot'] nobody
0-46827
13 hours ago
0-46827
13 hours ago
0-46808
13 hours
29116 scholzhannah
author:scholzhannah
chore(Topology/PartialHomeomorph): add module deprecation This is the follow-up PR of #29113 adding the deprecated module after the file was renamed. --- - [ ] depends on: #29113 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) delegated 4/0 Mathlib.lean,Mathlib/Topology/PartialHomeomorph.lean 2 13 ['fpvandoorn', 'github-actions', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-46650
12 hours ago
0-47467
13 hours ago
0-2683
44 minutes
30167 RemyDegenne
author:RemyDegenne
feat: Fernique's theorem for Gaussian distributions For a Gaussian measure on a second-countable normed space, there exists `C > 0` such that the function `x ↦ exp (C * ‖x‖ ^ 2)` is integrable. As a consequence, a Gaussian measure in a second-countable Banach space has finite moments of all orders. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 275/0 Mathlib.lean,Mathlib/Probability/Distributions/Gaussian/Basic.lean,Mathlib/Probability/Distributions/Gaussian/Fernique.lean,docs/1000.yaml 4 2 ['RemyDegenne', 'github-actions'] nobody
0-46440
12 hours ago
0-46470
12 hours ago
0-46512
12 hours
27414 staroperator
author:staroperator
feat(ModelTheory): Semilinear sets in `ℕ ^ k` are closed under intersection and complement Separated from #27100. This PR proves that semilinear sets in `ℕ ^ k` are closed under intersection, complement and set difference. We will soon generalize them in #27789. --- - [x] depends on: #27082 - [x] depends on: #27086 - [x] depends on: #27088 - [x] depends on: #27096 - [x] depends on: #27342 - [x] depends on: #28670 - [x] depends on: #29032 - [x] depends on: #29749 - [x] depends on: #29784 - [x] depends on: #29793 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic awaiting-author 628/4 Mathlib.lean,Mathlib/ModelTheory/Arithmetic/Presburger/Semilinear/Defs.lean,Mathlib/ModelTheory/Arithmetic/Presburger/Semilinear/Nat.lean 3 10 ['YaelDillies', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'staroperator'] fpvandoorn
assignee:fpvandoorn
0-45888
12 hours ago
0-60774
16 hours ago
10-71159
10 days
30122 xroblot
author:xroblot
Development branch (1) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import WIP 1696/87 Mathlib.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/FieldTheory/LinearDisjoint.lean,Mathlib/FieldTheory/Minpoly/IsIntegrallyClosed.lean,Mathlib/KroneckerWeber_Blueprint.lean,Mathlib/LinearAlgebra/BilinearForm/Properties.lean,Mathlib/Misc.lean,Mathlib/NumberTheory/Cyclotomic/Basic.lean,Mathlib/NumberTheory/Cyclotomic/Rat.lean,Mathlib/NumberTheory/NumberField/Discriminant/Different.lean,Mathlib/Riccardo.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/DedekindDomain/IntegralClosure.lean,Mathlib/RingTheory/DedekindDomain/LinearDisjoint.lean,Mathlib/RingTheory/FractionalIdeal/Extended.lean,Mathlib/RingTheory/Ideal/GoingUp.lean,Mathlib/RingTheory/Ideal/Norm/RelNorm.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/FractionRing.lean,Mathlib/RingTheory/Trace/Basic.lean,Mathlib/RingTheory/UniqueFactorizationDomain/NormalizedFactors.lean,Mathlib/Stickelberger.lean 24 1 ['github-actions'] nobody
0-45631
12 hours ago
0-45828
12 hours ago
0-12
12 seconds
29759 NotWearingPants
author:NotWearingPants
feat(Analysis/SpecificLimits/Fibonacci): prove that the ratio of consecutive Fibonacci numbers tends to the golden ratio --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge new-contributor t-analysis 36/0 Mathlib.lean,Mathlib/Analysis/SpecificLimits/Fibonacci.lean 2 7 ['NotWearingPants', 'Ruben-VandeVelde', 'github-actions', 'kckennylau'] nobody
0-45099
12 hours ago
0-45100
12 hours ago
8-14078
8 days
30147 NotWearingPants
author:NotWearingPants
feat(NumberTheory/ArithmeticFunction): add some lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-number-theory 23/1 Mathlib/NumberTheory/ArithmeticFunction.lean 1 2 ['github-actions', 'kckennylau'] nobody
0-44490
12 hours ago
1-4624
1 day ago
1-4659
1 day
29960 yonggyuchoimath
author:yonggyuchoimath
feat(Algebra/Category/Ring): equalizers of pushout maps of tensor product inclusions This PR defines a ring map `S →ₗ[R] S ⊗[R] S : s ↦ (s ⊗ₜ[R] 1) - (1 ⊗ₜ[R] s)` for an `R`-algebra `S`, and show that its kernel is exactly (the image of) `R` if `S` is faithfully flat over `R`. Changes: * `TensorProduct.AlgebraTensorModule.distribBaseChange`: Origianlly takes `M` and `N`, where `M` is an `R`-module with an additional instance `IsScalarTower R A M`. This is unnecessary, so I changed the `M` and `N` into `N` and `Q`, now both of which are merely modules over `R`. Main results : * Add compatibility of `Algebra.TensorProduct.includeLeft` (or `Algebra.TensorProduct.includeRight`) with `TensorProduct.AlgebraTensorModule.distribBaseChange` and `LinearMap.lTensor` * Define `Algebra.TensorProduct.includeLeftSubRight`, which is the `R`-linear map `S →ₗ[R] S ⊗[R] S` sending `s : S` to `(s ⊗ₜ[R] 1) - (1 ⊗ₜ[R] s)`. * `Algebra.TensorProduct.exactIncludeLeftSubRight_of_faithfullyFlat`: the pair `algebraMap : R → S` and `includeLeftSubRight R S : S → S ⊗[R] S` is exact if `S` is a faithfully flat `R`-algebra. new-contributor 229/1 Mathlib.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/IncludeLeftSubRight.lean 4 3 ['erdOne', 'github-actions', 'yonggyuchoimath'] nobody
0-44399
12 hours ago
3-28285
3 days ago
5-62757
5 days
26885 pechersky
author:pechersky
feat(Topology/ValuativeRel): ValuativeTopology 𝒪[K] and even when not a field, `ValuativeRel 𝒪[K]` This is an example of something achievable with the new declarations that wasn't possible with Valued Such that we can discuss the valuations on the subring without always using coercions But to achieve this, one needs some juggling of the value groups --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #26834 t-algebra t-topology t-number-theory
label:t-algebra$
73/0 Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 2 8 ['erdOne', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] alreadydone
assignee:alreadydone
0-44056
12 hours ago
37-28345
1 month ago
87-13354
87 days
29507 zhuyizheng
author:zhuyizheng
feat(MeasureTheory): derivative integrable functions Part of originally planned #29092. We prove that: * If `f` is monotone on `a..b`, then `f'` is interval integrable on `a..b`. * If `f` has bounded variation on `a..b`, then `f'` is interval integrable on `a..b`. * If `f` is absolutely continuous on `a..b`, then `f'` exists a.e. on `a..b` and is interval integrable on `a..b`. --- - [ ] depends on: #29504 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability 257/1 Mathlib.lean,Mathlib/MeasureTheory/Function/AbsolutelyContinuous.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/DerivIntegrable.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-43870
12 hours ago
1-48576
1 day ago
0-0
0 seconds
28797 xroblot
author:xroblot
feat(DedekindDomain/Ideal): `relNorm` of a prime ideal The relative norm of the maximal ideal `P` above the maximal ideal `p` is equal to `p ^ p.inertiaDeg P`. --- - [x] depends on: #27105 - [x] depends on: #27157 - [x] depends on: #28169 - [x] depends on: #28738 - [x] depends on: #28724 - [x] depends on: #29068 - [x] depends on: #29069 - [x] depends on: #29907 t-ring-theory 166/1 Mathlib/RingTheory/Ideal/GoingUp.lean,Mathlib/RingTheory/Ideal/Norm/RelNorm.lean,Mathlib/RingTheory/UniqueFactorizationDomain/NormalizedFactors.lean 3 17 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'riccardobrasca', 'xroblot'] riccardobrasca
assignee:riccardobrasca
0-42704
11 hours ago
2-57036
2 days ago
2-64999
2 days
28557 ShreckYe
author:ShreckYe
feat(Data/Nat/Factorization): some results on equality of powers of naturals proved from factorization I came across some math olympiad problems in number theory that could benefit from these theorems, expecially those on the prime power equality `p ^ m = a ^ n`. A specialized `eq_of_factorization_eq'` is added BTW to help with proof search. t-data awaiting-author 102/0 Mathlib/Data/Nat/Factorization/Basic.lean,Mathlib/Data/Nat/Factorization/Defs.lean,Mathlib/Data/Nat/Factorization/PrimePow.lean 3 8 ['Ruben-VandeVelde', 'github-actions'] pechersky
assignee:pechersky
0-42520
11 hours ago
0-42520
11 hours ago
46-80571
46 days
29649 MichaelStollBayreuth
author:MichaelStollBayreuth
feat(Analysis/Normed/Algebra/GelfandMazur): new file This adds two version of the *Gelfand-Mazur* *Theorem*: ```lean NormedAlgebra.Complex.nonempty_algEquiv (F : Type*) [NormedRing F] [NormOneClass F] [NormMulClass F] [NormedAlgebra ℂ F] [Nontrivial F] : Nonempty (ℂ ≃ₐ[ℂ] F) NormedAlgebra.Real.nonempty_algEquiv_or (F : Type*) [NormedField F] [NormedAlgebra ℝ F] : Nonempty (F ≃ₐ[ℝ] ℝ) ∨ Nonempty (F ≃ₐ[ℝ] ℂ) ``` The version for complex algebras differs in its assumptions from the existing version [NormedRing.algEquivComplexOfComplete](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Normed/Algebra/Spectrum.html#NormedRing.algEquivComplexOfComplete) (nontrivial normed algebra with multiplicative norm vs. complete division ring with submultiplicative norm). A version for real algebras is not yet in Mathlib; it is needed in the context of implementing (absolute) heights; see [Heights](https://github.com/MichaelStollBayreuth/Heights). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 367/0 Mathlib.lean,Mathlib/Analysis/Normed/Algebra/GelfandMazur.lean 2 6 ['MichaelStollBayreuth', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib4-merge-conflict-bot'] j-loreaux
assignee:j-loreaux
0-42456
11 hours ago
7-42172
7 days ago
19-25394
19 days
28451 yapudpill
author:yapudpill
feat(RingTheory/Noetherian): add `IsNoetherianRing.of_prime` This PR introduces the first usage of `Ideal.IsOka` introduced in #27200 to prove that if all prime ideals of a `CommRing` are finitely generated then this ring is Noetherian. To do so, we also added the lemma `Ideal.mem_span_range_self`. --- - [x] depends on: #28525 - [x] depends on: #29567 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor awaiting-author 100/29 Mathlib.lean,Mathlib/RingTheory/Ideal/Span.lean,Mathlib/RingTheory/Noetherian/OfPrime.lean,docs/references.bib 4 18 ['github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot', 'riccardobrasca', 'yapudpill'] riccardobrasca
assignee:riccardobrasca
0-41547
11 hours ago
21-27655
21 days ago
6-62492
6 days
30004 luigi-massacci
author:luigi-massacci
feat(MeasureTheory/Integral/TestAgainst): integrating BCFs against a finite measure or an L1Loc map as CLMs This PR merges #29511 and #29748. Create a new file `TestAgainst.lean` with definitions wrapping integration against a finite measure or a locally integrable map as continuous linear maps on bounded continuous functions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability t-analysis 113/1 Mathlib.lean,Mathlib/MeasureTheory/Integral/BoundedContinuousFunction.lean,Mathlib/MeasureTheory/Integral/TestAgainst.lean 3 38 ['EtienneC30', 'github-actions', 'j-loreaux', 'luigi-massacci'] EtienneC30
assignee:EtienneC30
0-41535
11 hours ago
0-41716
11 hours ago
6-60069
6 days
26267 vasnesterov
author:vasnesterov
feat(Analysis/Calculus): Taylor series converges to function on whole ball * Prove `FormalMultilinearSeries.AnalyticOnNhd`: the sum of series is analytic on its ball of convergence. * Prove `AnalyticOn.hasFPowerSeriesOnBall`: a variant of `AnalyticAt.hasFPowerSeriesAt` which gives convergence to the function on the ball of convergence. --- - [x] depends on: #23745 - [x] depends on: #23747 - [x] depends on: #23748 - [x] depends on: #26247 This PR continues the work from #23749. Original PR: https://github.com/leanprover-community/mathlib4/pull/23749 t-analysis 65/0 Mathlib.lean,Mathlib/Analysis/Analytic/ChangeOrigin.lean,Mathlib/Analysis/Calculus/IteratedDeriv/ConvergenceOnBall.lean 3 5 ['github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'vasnesterov'] urkud
assignee:urkud
0-40639
11 hours ago
44-45198
1 month ago
91-30068
91 days
30170 smmercuri
author:smmercuri
feat: `Rat.padicValuation` is surjective --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory 13/0 Mathlib/NumberTheory/Padics/PadicNumbers.lean 1 1 ['github-actions'] nobody
0-40032
11 hours ago
0-40046
11 hours ago
0-40084
11 hours
29754 or4nge19
author:or4nge19
feat(Combinatorics/Quiver): add strongly connected quivers Define strongly connected quivers and their components. Add both standard strong connectivity (allowing length-0 paths) and positive-path strong connectivity. Establish basic properties and relationships to weak connectivity via symmetrification. This is part of Perron Frobenius theorem and grounds its characterization/def of Irreducible matrices and Markov chain analysis in subsequent PRs. split from #28728 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 210/5 Mathlib/Combinatorics/Quiver/ConnectedComponent.lean 1 13 ['github-actions', 'ocfnash', 'or4nge19'] ocfnash
assignee:ocfnash
0-39294
10 hours ago
3-26056
3 days ago
14-6851
14 days
30171 smmercuri
author:smmercuri
feat(DedekindDomain/AdicValuation): `le_one` lemmas for `HeightOneSpectrum.valuation` and specialisations to `Rat` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 53/0 Mathlib/RingTheory/DedekindDomain/AdicValuation.lean 1 1 ['github-actions'] nobody
0-38827
10 hours ago
0-38944
10 hours ago
0-38978
10 hours
30172 b-mehta
author:b-mehta
chore(SpecialFunctions/Pow/Real): adjust intCast lemma to use int The old statement was identical to the natCast one, and did not mention int or intCast at all, so we correct the statement. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis easy 1/1 Mathlib/Analysis/SpecialFunctions/Pow/Real.lean 1 1 ['github-actions'] nobody
0-38796
10 hours ago
0-38800
10 hours ago
0-38844
10 hours
29981 mans0954
author:mans0954
feat(Algebra/Polynomial/Degree/SmallDegree): eq_quadratic_of_degree_le_two Expansion of a polynomial of degree 2. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #30046 t-algebra
label:t-algebra$
7/0 Mathlib/RingTheory/Polynomial/SmallDegreeVieta.lean 1 9 ['JovanGerb', 'github-actions', 'mans0954', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vihdzp'] nobody
0-38249
10 hours ago
4-37401
4 days ago
7-31640
7 days
29856 mans0954
author:mans0954
feat(Analysis/Normed/Ring/Basic): Add NonUnitalNonAssocSeminormedRing and NonUnitalNonAssocNormedRing Adds the classes `NonUnitalNonAssocSeminormedRing` and `NonUnitalNonAssocNormedRing` and relaxes the `NonUnitalSeminormedRing` section to `NonUnitalNonAssocSeminormedRing`. Examples of non-unital non-associative normed rings include non-untial JB-algebras and non-unital JB*-algebras. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 110/11 Mathlib/Analysis/Normed/Ring/Basic.lean,MathlibTest/TCSynth.lean 2 1 ['github-actions'] ADedecker
assignee:ADedecker
0-38191
10 hours ago
12-47966
12 days ago
12-47978
12 days
26345 mans0954
author:mans0954
feat(Analysis/LocallyConvex/Polar): Bipolar theorem The bipolar theorem states that the polar of the polar of a set `s` is equal to the closed absolutely convex hull of `s`. The argument here follows Conway, Chapter V. 1.8. This PR continues the work from #20843. Original PR: https://github.com/leanprover-community/mathlib4/pull/20843 - [x] depends on: #27316 large-import t-analysis awaiting-author 334/93 Mathlib.lean,Mathlib/Analysis/LocallyConvex/AbsConvex.lean,Mathlib/Analysis/LocallyConvex/Bipolar.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/LocallyConvex/WeakDual.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Topology/Algebra/Module/LinearSpan.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean,Mathlib/Topology/Algebra/Module/WeakBilin.lean 9 n/a ['JonBannon', 'eric-wieser', 'faenuccio', 'github-actions', 'j-loreaux', 'leanprover-community-bot-assistant', 'mans0954', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'mcdoll'] nobody
0-38124
10 hours ago
unknown
unknown
30070 adomani
author:adomani
CI: remove deprecations automatically This workflow automates the removal of deprecated declarations. The action is currently configured to run once a week to automatically remove all deprecations older than 6 months. This is managed by the `remove_deprecated_decls` action and depends on the two files `Mathlib/Tactic/Linter/CommandRanges.lean` and `Mathlib/Tactic/Linter/FindDeprecations.lean`. The action can be manually triggered and there is the option of passing two dates in `YYYY-MM-DD` format or also the more human "3 months ago", as long as it is a valid input for `date -d`. The lean files take care of identifying the declarations with the deprecated attribute whose `since` field is between the given ranges. Those declarations then get automatically removed and, if there are no errors, the bot creates a PR with the changes. These PRs then go, naturally, through CI, where issues related to having removed the deprecated declarations will be picked up. The bot also posts a comment on Zulip mentioning when the PR has been opened. Co-authored-by: Bryan Gin-ge Chen --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 595/0 .github/workflows/remove_deprecated_decls.yml,Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/CommandRanges.lean,Mathlib/Tactic/Linter/FindDeprecations.lean,MathlibTest/FindDeprecations.lean 6 26 ['Vierkantor', 'adomani', 'bryangingechen', 'github-actions'] nobody
0-36780
10 hours ago
3-717
3 days ago
3-30076
3 days
29342 mans0954
author:mans0954
refactor(Analysis/LocallyConvex/AbsConvex): Redefine AbsConvex to use a single ring of scalars Currently the definition of Absolutely Convex in Mathlib is a little unexpected: ``` def AbsConvex (s : Set E) : Prop := Balanced 𝕜 s ∧ Convex ℝ s ``` At the time this definition was formulated, Mathlib's definition of `Convex` required the scalars to be an `OrderedSemiring` whereas the definition of `Balanced` required the scalars to be a `SeminormedRing`. Mathlib didn't have a concept of a semi-normed ordered ring, so a set was defined as `AbsConvex` if it is balanced over a `SeminormedRing` `𝕜` and convex over `ℝ`. Recently the requirements for the definition of `Convex` have been relaxed (#24392, #20595) so it is now possible to use a single scalar ring in common with the liturature. Previous discussion: - https://github.com/leanprover-community/mathlib4/pull/17029#discussion_r1782249323 - https://github.com/leanprover-community/mathlib4/pull/26345#discussion_r2287535746 --- - [ ] depends on: #29248 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 51/67 Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/LocallyConvex/AbsConvex.lean,Mathlib/Analysis/LocallyConvex/AbsConvexOpen.lean,Mathlib/Analysis/LocallyConvex/Basic.lean,Mathlib/Analysis/Normed/Module/Dual.lean 5 2 ['github-actions', 'mathlib4-dependent-issues-bot'] j-loreaux
assignee:j-loreaux
0-35413
9 hours ago
1-28431
1 day ago
1-28421
1 day
30174 mcdoll
author:mcdoll
feat: The Hölder conjugate of a ENNReal --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 4/0 Mathlib/Data/Real/ConjExponents.lean 1 1 ['github-actions'] nobody
0-34857
9 hours ago
0-34857
9 hours ago
0-34914
9 hours
30175 mcdoll
author:mcdoll
feat(Analysis/Distribution): A smooth function with compact support is a Schwartz function --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 23/0 Mathlib/Analysis/Distribution/SchwartzSpace.lean 1 1 ['github-actions'] nobody
0-34813
9 hours ago
0-34822
9 hours ago
0-34858
9 hours
30176 mcdoll
author:mcdoll
feat(Analysis/Distribution): Multiplication of two functions of temperate growth is of temperate growth --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 33/1 Mathlib/Analysis/Distribution/SchwartzSpace.lean 1 1 ['github-actions'] nobody
0-34758
9 hours ago
0-34768
9 hours ago
0-34808
9 hours
30161 EtienneC30
author:EtienneC30
feat: currying as a measurable equivalence --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 89/0 Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean,Mathlib/MeasureTheory/MeasurableSpace/Embedding.lean 2 1 ['github-actions'] nobody
0-34571
9 hours ago
0-55041
15 hours ago
0-55021
15 hours
30178 EtienneC30
author:EtienneC30
feat: preimage of Set.pi by uncurry --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 10/0 Mathlib/Data/Set/Prod.lean,Mathlib/Data/Set/Sigma.lean 2 1 ['github-actions'] nobody
0-34370
9 hours ago
0-34522
9 hours ago
0-34502
9 hours
30180 mcdoll
author:mcdoll
feat(Analysis/Calculus): add a version of bounding iterated derivatives of compositions with fewer assumptions on differentiability --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 17/3 Mathlib/Analysis/Calculus/ContDiff/Bounds.lean 1 1 ['github-actions'] nobody
0-34034
9 hours ago
0-34040
9 hours ago
0-34081
9 hours
25971 joelriou
author:joelriou
feat(CategoryTheory): pseudofunctors to Cat This PR adds convenience lemmas for pseudofunctors to `Cat`, mostly using the `to_app` attribute. The simp set for the `to_app` attribute is extended in order to take into account that in `Cat`, associators and unitors induce identities. --- - [x] depends on: #30134 This PR continues the work from #24384. Original PR: https://github.com/leanprover-community/mathlib4/pull/24384 t-category-theory 170/20 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Functor/Cat.lean,Mathlib/CategoryTheory/Bicategory/Grothendieck.lean,Mathlib/CategoryTheory/Bicategory/Strict/Pseudofunctor.lean,Mathlib/Tactic/CategoryTheory/ToApp.lean,MathlibTest/CategoryTheory/ToApp.lean 6 14 ['callesonne', 'chrisflav', 'github-actions', 'joelriou', 'mathlib4-dependent-issues-bot', 'yuma-mizuno'] nobody
0-33226
9 hours ago
1-31571
1 day ago
1-51199
1 day
26014 CBirkbeck
author:CBirkbeck
feat: define the Eisenstein Series E2 This PR continues the work from #24822. Original PR: https://github.com/leanprover-community/mathlib4/pull/24822 - [ ] depends on : #27606 t-number-theory 2364/482 Mathlib.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Complex/IntegerCompl.lean,Mathlib/Analysis/Complex/SummableUniformlyOn.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/Quaternion.lean,Mathlib/Analysis/SpecialFunctions/Log/Summable.lean,Mathlib/Geometry/Manifold/VectorBundle/MDifferentiable.lean,Mathlib/Geometry/Manifold/VectorBundle/SmoothSection.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/NumberTheory/EulerProduct/Basic.lean,Mathlib/NumberTheory/IccSums.lean,Mathlib/NumberTheory/LSeries/RiemannZeta.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/Defs.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/QExpansion.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/Summable.lean,Mathlib/NumberTheory/TsumDivsorsAntidiagonal.lean,Mathlib/RingTheory/MvPowerSeries/PiTopology.lean,Mathlib/RingTheory/MvPowerSeries/Substitution.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean,Mathlib/Topology/Algebra/InfiniteSum/Constructions.lean,Mathlib/Topology/Algebra/InfiniteSum/Defs.lean,Mathlib/Topology/Algebra/InfiniteSum/Group.lean,Mathlib/Topology/Algebra/InfiniteSum/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/Module.lean,Mathlib/Topology/Algebra/InfiniteSum/NatInt.lean,Mathlib/Topology/Algebra/InfiniteSum/Order.lean,Mathlib/Topology/Algebra/InfiniteSum/Ring.lean,Mathlib/Topology/Algebra/InfiniteSum/SummationFilter.lean,Mathlib/Topology/Algebra/Monoid/Defs.lean,Mathlib/Topology/ContinuousMap/Algebra.lean,Mathlib/Topology/Instances/ENNReal/Lemmas.lean,Mathlib/Topology/Instances/Matrix.lean,Mathlib/Topology/Instances/NNReal/Lemmas.lean 37 5 ['CBirkbeck', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
0-32816
9 hours ago
0-54735
15 hours ago
0-0
0 seconds
29914 loefflerd
author:loefflerd
feat(Topology/Algebra/InfiniteSum): generalise to allow summation filters We introduce a notion of a "summation filter" on a type, which is (a structure wrapper around) a filter on the finsets of that type. Then we can define tsums / tprods "along L" for any summation filter L, giving a formalism that specializes to the existing notion of unconditional summation, but also covers conditional summation on `ℕ` etc. This is implemented using an **optional parameter** to `HasSum`, `tsum` etc which defaults to the standard unconditional sum, so the vast majority of existing code using unconditional summation will work without change. Co-authored by Chris Birkbeck. --- Alternative take on #29602, using the optional-parameter mechanism. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-author 967/477 Mathlib.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Quaternion.lean,Mathlib/Analysis/SpecialFunctions/Log/Summable.lean,Mathlib/Geometry/Manifold/VectorBundle/SmoothSection.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/NumberTheory/EulerProduct/Basic.lean,Mathlib/NumberTheory/TsumDivsorsAntidiagonal.lean,Mathlib/RingTheory/MvPowerSeries/PiTopology.lean,Mathlib/RingTheory/MvPowerSeries/Substitution.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean,Mathlib/Topology/Algebra/InfiniteSum/Constructions.lean,Mathlib/Topology/Algebra/InfiniteSum/Defs.lean,Mathlib/Topology/Algebra/InfiniteSum/Group.lean,Mathlib/Topology/Algebra/InfiniteSum/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/Module.lean,Mathlib/Topology/Algebra/InfiniteSum/NatInt.lean,Mathlib/Topology/Algebra/InfiniteSum/Order.lean,Mathlib/Topology/Algebra/InfiniteSum/Ring.lean,Mathlib/Topology/Algebra/InfiniteSum/SummationFilter.lean,Mathlib/Topology/ContinuousMap/Algebra.lean,Mathlib/Topology/Instances/ENNReal/Lemmas.lean,Mathlib/Topology/Instances/Matrix.lean,Mathlib/Topology/Instances/NNReal/Lemmas.lean 25 50 ['CBirkbeck', 'github-actions', 'kckennylau', 'loefflerd', 'sgouezel'] nobody
0-32592
9 hours ago
0-44527
12 hours ago
5-28335
5 days
26282 AntoineChambert-Loir
author:AntoineChambert-Loir
feat: a theorem of Jordan on primitive subgroups of the permutation group A theorem of Jordan on the primitive subgroups of a permutation group: * if it contains a swap, it is equal to the permutation group, * if it contains a 3-cycle, it contains the alternating group. This PR continues the work from #24131. --- - [x] depends on: #26281 - [x] depends on: #26280 - [x] depends on: #26279 Original PR: https://github.com/leanprover-community/mathlib4/pull/24131 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory large-import maintainer-merge 939/137 Mathlib.lean,Mathlib/Data/Set/Card.lean,Mathlib/GroupTheory/GroupAction/FixingSubgroup.lean,Mathlib/GroupTheory/GroupAction/Jordan.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/GroupTheory/GroupAction/Primitive.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfFixingSubgroup.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfStabilizer.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean,Mathlib/SetTheory/Cardinal/Embedding.lean 11 n/a ['AntoineChambert-Loir', 'adomani', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'tb65536'] nobody
0-30339
8 hours ago
unknown
unknown
25760 robin-carlier
author:robin-carlier
feat(CategoryTheory/Bicategory): (2,1)-categories and `Pith` This PR introduces a class `IsLocallyGroupoid` on bicategories, asserting that every hom-category has an `IsGroupoid` instance. With this definition, `IsLocallyGroupoid (LocallyDiscrete C)` is correctly inferred. Given a bicategory `B`, we introduce a type alias `Pith B` for `B` (realized as a one-field structure), and we equip it with a `Bicategory` instance where the hom-categories are the cores of the hom-categories of `B`. We show that this bicategory is a (2,1)-category, construct an inclusion pseudo-functor from `Pith B` to `B`, and show that every pseudofunctor from a (2,1)-category to `B` factors through this inclusion. --- We can’t fully state the fact that `(pseudofunctorToPith F).comp (inclusion F)` "is" `F` because #18254 is still not merged. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #25150.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/25150* t-category-theory 178/0 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/LocallyGroupoid.lean,Mathlib/CategoryTheory/Core.lean 3 8 ['b-mehta', 'github-actions', 'joelriou', 'robin-carlier'] joelriou
assignee:joelriou
0-29719
8 hours ago
2-58728
2 days ago
105-18244
105 days
30132 callesonne
author:callesonne
feat(Bicategory/Functor/Strict): add `IsStrict` for pseudofunctors This PR adds the notion of a strict pseudofunctor (the class `IsStrict`), where the coherence isomorphisms are equalities. This will be useful for #25561 where I define the bicategory of groupoids. --- - [x] depends on: #30134 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 56/0 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Functor/Strict.lean 2 5 ['callesonne', 'github-actions', 'joelriou', 'mathlib4-dependent-issues-bot'] nobody
0-29024
8 hours ago
0-29033
8 hours ago
1-6037
1 day
30047 ooovi
author:ooovi
feat(Combinatorics/SimpleGraph): Add `EdgeLabelling` Add edge labellings for `SimpleGraph` as well as some basic lemmata. --- This is mostly a cleaned up part of @b-mehta's lean4 port of their [formalisation of an exponentially better upper bound on Ramsey numbers ](https://github.com/b-mehta/ExponentialRamsey/). I need these definitions for another project on Ramsey theory. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-combinatorics awaiting-author 229/5 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/EdgeLabelling.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Increment.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/Counting.lean 5 14 ['b-mehta', 'github-actions', 'ooovi', 'vlad902'] nobody
0-28799
7 hours ago
0-62182
17 hours ago
5-359
5 days
30162 bryangingechen
author:bryangingechen
ci(label_new_contributor.yml): only trigger when PR is opened Currently, this is triggered even when new bots push a commit to a PR (e.g. the pre-commit.ci bot); adding the `types` filter will prevent the `new-contributor` label being added in such cases. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 8/1 .github/workflows/label_new_contributor.yml 1 4 ['bryangingechen', 'github-actions', 'pechersky'] nobody
0-27550
7 hours ago
0-50284
13 hours ago
0-50265
13 hours
30137 vlad902
author:vlad902
feat(SimpleGraph): subsingleton/nontrivial helper lemmas Helper lemmas I found useful in mutliple PRs for dispatching trivial cases. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 22/0 Mathlib/Combinatorics/SimpleGraph/Basic.lean 1 1 ['github-actions'] nobody
0-27505
7 hours ago
1-25095
1 day ago
1-25133
1 day
30173 kckennylau
author:kckennylau
chore: generalise extensionality lemmas for localization This PR generalises some extensionality lemmas for morphisms from localization. The codomains are generalised from `CommMonoid` to `Monoid`, and from `CommSemiring` to `Semiring`. Then two new extensionality lemmas for algebra morphisms are added. Currently `Submonoid.LocalizationMap.epic_of_localizationMap` says that if `M` and `P` are commutative monoids, and `f : M →* N` is a localization map for a submonoid `S`, then two monoid homs `j k : N →* P` are equal if they are equal after composing with `f`. This PR relaxes the assumption on `P` from `CommMonoid` to `Monoid`. Similar generalisations are made in other places, and then two new lemmas for `AlgHom` are added. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
37/18 Mathlib/Algebra/Category/Ring/Instances.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean 5 1 ['github-actions'] nobody
0-27289
7 hours ago
0-36388
10 hours ago
0-36376
10 hours
29705 llllvvuu
author:llllvvuu
feat(LinearAlgebra/Matrix): formula for charpoly of an inverse matrix Co-authored-by: Aristotle Harmonic --- - [x] depends on: #29709 to re-organized some imports [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
14/0 Mathlib/LinearAlgebra/Matrix/Charpoly/Coeff.lean 1 7 ['github-actions', 'llllvvuu', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'themathqueen'] Vierkantor
assignee:Vierkantor
0-26172
7 hours ago
8-40800
8 days ago
8-50359
8 days
28546 Sfgangloff
author:Sfgangloff
feat(SymbolicDynamics): basic setup of Zd, full shift, cylinders, pat… # Symbolic dynamics on groups: core API and entropy along finite shapes This PR adds a **group-generic** foundation for symbolic dynamics over an arbitrary group `G`, together with convenient specializations for `ℤ` and `ℤ^d`. ## Summary of additions - **Full shift and shift action** - `abbrev FullShift (A G) := G → A` (inherits product topology from the Π-type). - Right shift `shift g x` with convention `(shift g x) h = x (h * g)`. - **Cylinders and topology** - `cylinder U x : Set (G → A)` for finite `U : Finset G`. - Cylinders are open under `[DiscreteTopology A]`; with a finite alphabet they are also closed. - Equality with dependent products: `cylinder U x = Set.pi (↑U) (fun i => ({x i} : Set A))`, enabling use of the `Set.pi` API. - **Patterns, occurrences, and subshifts** - `Pattern A G` with finite `support : Finset G` and `data : support → A`. - `Pattern.occursIn p x g` (occurrence at translate `g`) and the expected shift law. - `forbids F` and `Subshift A G` (closed, shift-invariant subsets). - `FixedSupport A G U` with an equivalence to `(U → A)` to obtain finiteness. - **Language on finite shapes and counting** - `languageOn X U`, `languageCardOn X U`, and `patternCountOn Y U`. - **Entropy along a shape sequence** - `limsupAtTop` (as an `sInf` of eventual upper bounds). - `entropyAlong X F hF := limsup (log (patternCountOn X (F n) + 1) / |F n|)` for any nonempty finite shapes `F : ℕ → Finset G` (the `+ 1` avoids `log 0`). - **Specializations** - `IntShapes`: segments `[-n,n]` on `Multiplicative ℤ`, with `entropy_Z`. - `ZdShapes`: boxes `[-n,n]^d` on `ℤ^d` (as functions `Fin d → ℤ`), with `entropy_Zd`. ## Mathematical remarks - The API is **shape-parametric**: entropy is defined along user-provided finite shapes. - On **amenable** groups, using a **Følner** sequence yields a canonical value (Ornstein–Weiss). This PR does not assume amenability; the family of shapes is an explicit input. ## Motivation Provide a clean, reusable base for symbolic dynamics on groups in mathlib. ## Future work - Add a Følner predicate and prove shape-independence / limit existence on amenable groups. - Expand the `ℤ`/`ℤ^d` toolkit (alternative shapes, mixing, factors). - Develop 1D theory and, longer-term, multidimensional SFT results (e.g. along the lines of Hochman–Meyerovitch). new-contributor t-dynamics awaiting-author 717/0 Mathlib.lean,Mathlib/Dynamics/SymbolicDynamics/Basic.lean 2 62 ['Sfgangloff', 'eric-wieser', 'github-actions', 'kckennylau', 'sgouezel'] sgouezel
assignee:sgouezel
0-25892
7 hours ago
1-67355
1 day ago
33-71082
33 days
26785 TOMILO87
author:TOMILO87
feat: beta distribution Add the Beta distribution to the probability distributions in mathlib4 This PR introduces the Beta distribution on the reals. Main definitions: - betaPDFReal (α β x : ℝ) — the probability density function as a real-valued function - betaPDF (α β x : ℝ) — the pdf as a ℝ≥0∞-valued function - betaMeasure (α β : ℝ) — the probability measure associated with the Beta distribution Main results: - lintegral_betaPDF_eq_one — proof that the pdf integrates to 1 (normalization) - Lemmas on positivity, measurability, and integrability of the pdf - isProbabilityMeasureBeta — the Beta measure is a probability measure Notes: - Follows the general structure of other distributions in mathlib (e.g. Gamma). - Several unused helper lemmas were removed, and proofs streamlined in response to reviewer feedback. - Thanks to @EtienneC30 and @RemyDegenne for detailed reviews across multiple rounds. This is a clean version of the PR originally opened as [#25608](https://github.com/leanprover-community/mathlib4/pull/25608) and temporarily migrated in [#26325](https://github.com/leanprover-community/mathlib4/pull/26325). new-contributor t-measure-probability 152/0 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Beta.lean,Mathlib/Probability/Distributions/Beta.lean 3 49 ['EtienneC30', 'RemyDegenne', 'TOMILO87', 'github-actions'] EtienneC30
assignee:EtienneC30
0-21323
5 hours ago
9-65808
9 days ago
70-6733
70 days
29284 Jlh18
author:Jlh18
feat(CategoryTheory): naturality lemmas for Core construction Lemmas for PR #29283 to prove that `Core` is the right adjoint to the forgetful functor from `Cat` to `Grpd`. These lemmas are more general than that setting, and need not be stated in the bundled format. - [ ] depends on: #29250 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 62/0 Mathlib/CategoryTheory/Core.lean 1 14 ['Jlh18', 'adomani', 'github-actions', 'joelriou', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-21143
5 hours ago
0-21143
5 hours ago
14-34966
14 days
29033 faenuccio
author:faenuccio
feat(Analysis.LocallyConvex): a linear map is surjective iff its image contains a ball, or a closed ball, or a sphere Prove that a linear map is surjective if and only if its image contains either a ball or a sphere. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-analysis awaiting-author 104/7 Mathlib/Analysis/LocallyConvex/Basic.lean,Mathlib/Analysis/Normed/Module/Convex.lean,Mathlib/Analysis/Normed/Operator/Basic.lean 3 23 ['ADedecker', 'eric-wieser', 'faenuccio', 'github-actions', 'j-loreaux', 'yuanyi-350'] nobody
0-21108
5 hours ago
0-21108
5 hours ago
0-75134
20 hours
30181 alreadydone
author:alreadydone
feat(Data/Nat): reducible strong recursion --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 43/25 Mathlib/Data/Int/GCD.lean,Mathlib/Data/Nat/Init.lean 2 4 ['github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] nobody
0-20985
5 hours ago
0-20994
5 hours ago
0-27046
7 hours
29979 jano-wol
author:jano-wol
feat: invariant dual submodules define Lie ideals Invariant dual submodules define Lie ideals --- PR shows that Invariant dual submodules define Lie ideals. This work is part of the framework: https://github.com/orgs/leanprover-community/projects/17 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
425/166 Mathlib.lean,Mathlib/Algebra/Lie/Weights/IsSimple.lean,Mathlib/Algebra/Lie/Weights/RootSystem.lean,Mathlib/LinearAlgebra/RootSystem/Finite/Lemmas.lean 4 7 ['github-actions', 'jano-wol', 'ocfnash'] ocfnash
assignee:ocfnash
0-20979
5 hours ago
0-23180
6 hours ago
2-60752
2 days
30182 urkud
author:urkud
feat(Calculus): derivative of `ContinuousMultilinearMap.compContinuousLinearMap` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 137/0 Mathlib.lean,Mathlib/Analysis/Calculus/FDeriv/ContinuousMultilinearMap.lean,Mathlib/Analysis/NormedSpace/Multilinear/Basic.lean 3 1 ['github-actions'] nobody
0-20623
5 hours ago
0-20631
5 hours ago
0-20670
5 hours
29795 Jlh18
author:Jlh18
refactor: weaken HasPullbacks to HasPullback in Over.Pullback Add an abbreviation `HasPullbackAlong f` to mean that all maps into the codomain of `f` have pullbacks along `f`. As discussed in zulip [#mathlib4 > Hom.HasPullback](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Hom.2EHasPullback/with/541055666) The `HasPullbacks` instance on a category `C` for defining the pullback functor along a map `f : X -> Y` between their over categories can be weakened to just a `HasPullbackAlong` condition on `f`. Dually, for `HasPushout` and undercategories. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory 31/14 Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/HasPullback.lean 2 22 ['Jlh18', 'chrisflav', 'github-actions', 'kckennylau', 'leanprover-bot', 'mathlib4-merge-conflict-bot', 'peabrainiac'] kim-em
assignee:kim-em
0-20589
5 hours ago
0-20612
5 hours ago
14-47720
14 days
29004 euprunin
author:euprunin
chore: change from `:= by rfl` to `:= rfl` For `@[simp]` lemmas this makes them usable by `dsimp`; others are stylistic cleanup (but they're now "`dsimp`-ready" if tagged later). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 138/242 Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Algebra/DirectSum/Ring.lean,Mathlib/Algebra/Group/AddChar.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/GroupWithZero/ProdHom.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplex.lean,Mathlib/Algebra/Homology/ShortComplex/LeftHomology.lean,Mathlib/Algebra/Homology/Single.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Lie/OfAssociative.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Order/Hom/MonoidWithZero.lean,Mathlib/Algebra/Order/Hom/Ring.lean,Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Polynomial/Derivation.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Ring/Hom/Defs.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/Algebra/Vertex/HVertexOperator.lean,Mathlib/Algebra/Vertex/VertexOperator.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/Analysis/Asymptotics/ExpGrowth.lean,Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/Analysis/Calculus/FDeriv/Prod.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/Normed/Affine/Isometry.lean,Mathlib/Analysis/Normed/Group/Seminorm.lean,Mathlib/Analysis/Normed/Module/Span.lean,Mathlib/Analysis/SpecialFunctions/Complex/CircleAddChar.lean,Mathlib/Analysis/SpecialFunctions/Stirling.lean,Mathlib/CategoryTheory/Closed/Monoidal.lean,Mathlib/CategoryTheory/Distributive/Monoidal.lean,Mathlib/CategoryTheory/Limits/Presheaf.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Cospan.lean,Mathlib/CategoryTheory/Monoidal/Comon_.lean,Mathlib/CategoryTheory/Monoidal/Mod_.lean,Mathlib/CategoryTheory/Yoneda.lean,Mathlib/Combinatorics/SimpleGraph/Walk.lean,Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Computability/AkraBazzi/SumTransform.lean,Mathlib/Data/Matrix/Basic.lean,Mathlib/Data/Nat/Factorization/PrimePow.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/PFunctor/Multivariate/Basic.lean,Mathlib/Data/Real/Embedding.lean,Mathlib/Data/Rel.lean,Mathlib/Data/Seq/Basic.lean,Mathlib/Data/Set/Lattice.lean,Mathlib/Data/Set/Pairwise/Lattice.lean,Mathlib/Data/Subtype.lean,Mathlib/Geometry/Manifold/Bordism.lean,Mathlib/GroupTheory/Coxeter/Basic.lean,Mathlib/GroupTheory/GroupAction/Hom.lean,Mathlib/GroupTheory/SpecificGroups/Quaternion.lean,Mathlib/LinearAlgebra/AffineSpace/Simplex/Basic.lean,Mathlib/LinearAlgebra/Dual/Defs.lean,Mathlib/LinearAlgebra/Lagrange.lean,Mathlib/LinearAlgebra/Matrix/GeneralLinearGroup/Defs.lean,Mathlib/LinearAlgebra/Multilinear/TensorProduct.lean,Mathlib/LinearAlgebra/Projectivization/Action.lean,Mathlib/LinearAlgebra/RootSystem/Hom.lean,Mathlib/LinearAlgebra/RootSystem/Reduced.lean,Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Pi.lean,Mathlib/MeasureTheory/MeasurableSpace/Embedding.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/NumberTheory/FLT/Polynomial.lean,Mathlib/NumberTheory/FactorisationProperties.lean,Mathlib/NumberTheory/Harmonic/ZetaAsymp.lean,Mathlib/NumberTheory/Padics/WithVal.lean,Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/RepresentationTheory/Coinvariants.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/Functoriality.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/LowDegree.lean,Mathlib/RingTheory/AlgebraTower.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/HahnSeries/Addition.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/SetTheory/Surreal/Basic.lean,Mathlib/SetTheory/ZFC/Class.lean,Mathlib/Tactic/Module.lean,Mathlib/Tactic/NormNum/PowMod.lean,Mathlib/Topology/Algebra/Algebra/Equiv.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,Mathlib/Topology/Category/Profinite/Nobeling/Basic.lean,Mathlib/Topology/Category/Profinite/Nobeling/ZeroLimit.lean,Mathlib/Topology/Category/TopCat/Opens.lean,Mathlib/Topology/ContinuousMap/Units.lean,Mathlib/Topology/LocallyFinsupp.lean,Mathlib/Topology/PartitionOfUnity.lean,Mathlib/Topology/Sets/Closeds.lean 95 21 ['eric-wieser', 'euprunin', 'github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] TwoFX
assignee:TwoFX
0-20408
5 hours ago
0-20431
5 hours ago
10-6700
10 days
27918 kim-em
author:kim-em
wip: refactor WithBot/WithTop as structures For now we are still relying on `WithBot` and `WithTop` being defeq, but there is no impossible obstacle to converting them *both* to the same structure. This PR begins this effort; the modified files are all compiling, but there are more files that still have problems. Help on this (either ask to push to my branch, PR to my branch, or just adopt the whole thing!) very much appreciated. file-removed 955/354 Mathlib.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Algebra/Order/Monoid/ToMulBot.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Degree/Operations.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/BoxIntegral/Partition/SubboxInduction.lean,Mathlib/Analysis/Meromorphic/Order.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Data/Countable/Basic.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/ENat/Defs.lean,Mathlib/Data/EReal/Operations.lean,Mathlib/Data/Finset/WithBot.lean,Mathlib/Data/Fintype/WithTopBot.lean,Mathlib/Data/List/MinMax.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Ordmap/Invariants.lean,Mathlib/Data/Ordmap/Ordset.lean,Mathlib/Data/Sum/Order.lean,Mathlib/Geometry/Manifold/PartitionOfUnity.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/Logic/Embedding/WithBot.lean,Mathlib/Logic/Equiv/WithBot.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Real.lean,Mathlib/MeasureTheory/Group/Measure.lean,Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean,Mathlib/Order/Category/BddLat.lean,Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/GaloisConnection/Basic.lean,Mathlib/Order/Hom/WithTopBot.lean,Mathlib/Order/Interval/Basic.lean,Mathlib/Order/Interval/Finset/Defs.lean,Mathlib/Order/Interval/Set/WithBotTop.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Order/Set.lean,Mathlib/Order/SuccPred/Basic.lean,Mathlib/Order/TypeTags.lean,Mathlib/Order/WithBot/Basic.lean,Mathlib/Order/WithBot/BooleanAlgebra.lean,Mathlib/Order/WithBot/NAry.lean,Mathlib/RingTheory/UniqueFactorizationDomain/FactorSet.lean,Mathlib/SetTheory/Cardinal/ENat.lean,Mathlib/Topology/Algebra/Ring/Real.lean,Mathlib/Topology/Category/LightProfinite/Sequence.lean,Mathlib/Topology/Compactification/OnePoint/Basic.lean,Mathlib/Topology/Instances/ENat.lean,MathlibTest/lift.lean 56 11 ['eric-wieser', 'github-actions', 'kim-em', 'mathlib4-merge-conflict-bot'] nobody
0-20266
5 hours ago
1-68935
1 day ago
48-79961
48 days
29279 Jlh18
author:Jlh18
feat: free groupoid on a category, free-forgetful adjunction - define `CategoryTheory.Category.FreeGroupoid` in a file of the same name - show the universal property of this construction, as the initial category localizing all maps in the category. These are the defs `of`, `lift`, and their related theorems - Show that this construction is functorial `CategoryTheory.Category.FreeGroupoid.map` - Convert this to a functor `CategoryTheory.Category.Grpd.free` from `Cat` to `Grpd`, and show that it is left adjoint to the forgetful functor - `CategoryTheory.Grpd.freeForgetAdjunction` - [ ] depends on: #29278 - [ ] depends on: #30115 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory 236/1 Mathlib.lean,Mathlib/CategoryTheory/Category/FreeGroupoid.lean,Mathlib/CategoryTheory/Groupoid/FreeGroupoid.lean 3 10 ['Jlh18', 'MichaelStollBayreuth', 'github-actions', 'joelriou', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-19833
5 hours ago
0-20807
5 hours ago
11-20855
11 days
25736 robin-carlier
author:robin-carlier
feat(AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms): Normal forms for `P_σ`s We prove that admissible lists introduced in #21744 indeed provide a suitable normal form for morphisms of `SimplexCategoryGenRel` satisfying `P_σ` (i.e that are compositions of degeneracies). To this end, we introduce `standardσ`, a construction that takes a list and turn it into a composition of `σ i`s in `SimplexCategoryGenRel`. We then prove that, thanks to the fifth simplicial identity, composition on the right by some `σ i` corresponds to simplicial insertion of `i` in the list. This gives existence of a normal form for every morphism satisfying `P_σ`, i.e exhibits such morphism as some `standardσ`. For unicity, we introduce an auxiliary function `simplicialEvalσ : (List ℕ) → ℕ → ℕ` and show that for admissible lists, it lifts to `ℕ` the `orderHom` attached to `toSimplexCategory.map standardσ` and that we can recover elements of the list only by looking at values of this function. Since admissible lists are sorted, this fully characterizes the list, and thus shows that the list only depends on the morphism `standardσ` attached to it. Part of a series of PR formalising that `SimplexCategoryGenRel` is equivalent to `SimplexCategory`. --- - [x] depends on: #21744 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #21745.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/21745* t-algebraic-topology large-import ready-to-merge delegated 189/7 Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms.lean 1 16 ['bryangingechen', 'github-actions', 'jcommelin', 'joelriou', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'robin-carlier'] mattrobball
assignee:mattrobball
0-19151
5 hours ago
0-19151
5 hours ago
106-27684
106 days
30183 NotWearingPants
author:NotWearingPants
chore(Algebra/BigOperators): move factorial theorem to `Data/Nat/Factorial/BigOperators` --- I think it makes sense to place it next to similar theorems about `ascFactorial` and `descFactorial`, but I've left the original because it's tagged `@[simp]`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor 9/6 Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Data/Nat/Factorial/BigOperators.lean 2 1 ['github-actions'] nobody
0-16671
4 hours ago
0-20217
5 hours ago
0-20266
5 hours
27844 CBirkbeck
author:CBirkbeck
Add q-expansion identities for Eisenstein series. This is PR contains some q-expansion identities that are needed to give the q-expansions of Eisenstein series, which will be added as part of #27606. --- - [x] depends on: #27212 - [x] depends on: #27837 - [x] depends on: #27839 - [x] depends on: #27840 - [x] depends on: #27841 - [x] depends on: #26016 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge t-number-theory 257/0 Mathlib.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Complex/SummableUniformlyOn.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/NumberTheory/LSeries/RiemannZeta.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/Defs.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/QExpansion.lean 7 44 ['CBirkbeck', 'MichaelStollBayreuth', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-15380
4 hours ago
0-26969
7 hours ago
0-61485
17 hours
29936 ineol
author:ineol
fix(LinearAlgebra/AffineSpace/Simplex): update `setInterior` docstring The coefficients range over the parameter `I`, not the open interval `(0,1)`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra awaiting-author
label:t-algebra$
1/2 Mathlib/LinearAlgebra/AffineSpace/Simplex/Basic.lean 1 2 ['github-actions', 'joelriou'] joelriou
assignee:joelriou
0-14735
4 hours ago
0-36845
10 hours ago
9-24700
9 days
27053 tb65536
author:tb65536
(WIP) Galois group of `x^n - x - 1` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra WIP
label:t-algebra$
377/7 Mathlib/RingTheory/Polynomial/Selmer.lean 1 3 ['AntoineChambert-Loir', 'github-actions'] nobody
0-12402
3 hours ago
83-10910
2 months ago
0-1
1 second
30150 imbrem
author:imbrem
feat(CategoryTheory/Monoidal): to_additive for MonoidalCategory Added `AddMonoidalCategory`, the additive version of `MonoidalCategory`. --- As discussed in #28718; I added an `AddMonoidalCategory` struct and tagged `MonoidalCategory` with `to_additive`, along with the lemmas in `Category.lean`. To get this to work, I needed to _remove_ the `to_additive` attributes in `Discrete.lean`, since otherwise the instances and lemmas within would be ill-typed (as MonoidalCategory would be replaced with AddMonoidalCategory). We simply implement the additive variants by hand instead. I think this is the right approach, since under this framework the "correct" additive version of `Discrete.lean` would be mapping an `AddMonoid` to an `AddMonoidalCategory`. Next steps would be to: - Make `monoidal_coherence` and `coherence` support `AddMonoidalCategory` - Add `CocartesianMonoidalCategory` extending `AddMonoidalCategory` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor 408/126 Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Tactic/ToAdditive/GuessName.lean 3 5 ['JovanGerb', 'YaelDillies', 'github-actions', 'imbrem'] nobody
0-11014
3 hours ago
0-83431
23 hours ago
0-83470
23 hours
27273 xroblot
author:xroblot
feat(IntermediateField/LinearDisjoint): Two fields are linearly disjoint iff they are disjoint in the Galois case --- - [x] depends on: #26841 t-algebra
label:t-algebra$
73/1 Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/FieldTheory/LinearDisjoint.lean 3 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] mattrobball
assignee:mattrobball
0-8016
2 hours ago
7-62714
7 days ago
7-64326
7 days
23181 YaelDillies
author:YaelDillies
refactor(Topology/UniformSpace): use `SetRel` What's left in `UniformSpace.Defs` is precisely the theory of the uniformity filter. The motivation is that the theory of coverings and packings in both high dimensional probability and dynamics can be based on entourages, while they have little to do with the uniformity filter (indeed, entourages are in a sense a quantitative version of the uniformity filter). --- - [x] depends on: #25587 - [x] depends on: #26988 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 660/618 Mathlib/Data/Rel.lean,Mathlib/Dynamics/TopologicalEntropy/CoverEntropy.lean,Mathlib/Dynamics/TopologicalEntropy/DynamicalEntourage.lean,Mathlib/Dynamics/TopologicalEntropy/NetEntropy.lean,Mathlib/Dynamics/TopologicalEntropy/Semiconj.lean,Mathlib/Dynamics/TopologicalEntropy/Subset.lean,Mathlib/InformationTheory/Hamming.lean,Mathlib/MeasureTheory/Measure/RegularityCompacts.lean,Mathlib/Topology/MetricSpace/BundledFun.lean,Mathlib/Topology/MetricSpace/PiNat.lean,Mathlib/Topology/Metrizable/Uniformity.lean,Mathlib/Topology/UniformSpace/Ascoli.lean,Mathlib/Topology/UniformSpace/Basic.lean,Mathlib/Topology/UniformSpace/Cauchy.lean,Mathlib/Topology/UniformSpace/Compact.lean,Mathlib/Topology/UniformSpace/CompactConvergence.lean,Mathlib/Topology/UniformSpace/Completion.lean,Mathlib/Topology/UniformSpace/Defs.lean,Mathlib/Topology/UniformSpace/DiscreteUniformity.lean,Mathlib/Topology/UniformSpace/Equicontinuity.lean,Mathlib/Topology/UniformSpace/HeineCantor.lean,Mathlib/Topology/UniformSpace/OfCompactT2.lean,Mathlib/Topology/UniformSpace/OfFun.lean,Mathlib/Topology/UniformSpace/Separation.lean,Mathlib/Topology/UniformSpace/Ultra/Basic.lean,Mathlib/Topology/UniformSpace/Ultra/Completion.lean,Mathlib/Topology/UniformSpace/Ultra/Constructions.lean,Mathlib/Topology/UniformSpace/UniformApproximation.lean,Mathlib/Topology/UniformSpace/UniformConvergence.lean,Mathlib/Topology/UniformSpace/UniformEmbedding.lean 30 35 ['ADedecker', 'PatrickMassot', 'YaelDillies', 'b-mehta', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] ADedecker
assignee:ADedecker
0-8016
2 hours ago
7-47797
7 days ago
83-24318
83 days
28561 euprunin
author:euprunin
chore(Data): golf entire `equivFunOnFintype_single`, `predAbove_right_zero`, `snoc_zero` and more using `rfl` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 25/88 Mathlib/Data/DFinsupp/Defs.lean,Mathlib/Data/Fin/Tuple/Basic.lean,Mathlib/Data/Fin/Tuple/Take.lean,Mathlib/Data/Finmap.lean,Mathlib/Data/Finsupp/AList.lean,Mathlib/Data/Finsupp/Single.lean,Mathlib/Data/Matrix/Basic.lean,Mathlib/Data/Matrix/Block.lean,Mathlib/Data/PFunctor/Multivariate/W.lean,Mathlib/Data/PFunctor/Univariate/M.lean,Mathlib/Data/QPF/Multivariate/Constructions/Cofix.lean,Mathlib/Data/Seq/Computation.lean,Mathlib/Data/Set/Piecewise.lean,Mathlib/Data/Set/Sups.lean,Mathlib/Data/TypeVec.lean,Mathlib/Data/Vector/Basic.lean,Mathlib/Data/Vector/Defs.lean 17 7 ['github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] pechersky
assignee:pechersky
0-8015
2 hours ago
29-30851
29 days ago
45-6079
45 days
28582 Thmoas-Guan
author:Thmoas-Guan
feat(Data): some lemmas about WithBot ENat Add some lemma about withBot ENat discovered when dealing with `ringKrullDim` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 25/0 Mathlib/Data/ENat/Basic.lean 1 5 ['Ruben-VandeVelde', 'Thmoas-Guan', 'github-actions'] pechersky
assignee:pechersky
0-8014
2 hours ago
10-64422
10 days ago
35-41894
35 days
29356 Paul-Lez
author:Paul-Lez
feat(Mathlib/FieldTheory/RatFunc/Basic): add characteristic instances for `RatFunc` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
63/17 Mathlib.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Field.lean,Mathlib/Algebra/Algebra/IsSimpleRing.lean,Mathlib/Algebra/CharP/Algebra.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/FieldTheory/Differential/Liouville.lean,Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/FieldTheory/Finite/GaloisField.lean,Mathlib/FieldTheory/RatFunc/Basic.lean,Mathlib/RingTheory/Localization/FractionRing.lean 11 8 ['Paul-Lez', 'eric-wieser', 'github-actions'] kim-em
assignee:kim-em
0-8013
2 hours ago
29-17858
29 days ago
29-17890
29 days
29463 HugLycan
author:HugLycan
feat(Positivity): add positivity extensions for `NNReal.rpow` and `ENNReal.rpow` --- This PR adds positivity extensions for `NNReal.rpow` and `ENNReal.rpow`. related issue #6038 @fpvandoorn [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis 70/3 Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,MathlibTest/positivity.lean 2 10 ['HugLycan', 'fpvandoorn', 'github-actions', 'grunweg'] hrmacbeth
assignee:hrmacbeth
0-8012
2 hours ago
7-45769
7 days ago
7-47451
7 days
29863 FernandoChu
author:FernandoChu
feat(CategoryTheory): Colimits in `Subobject X` Adds colimits to `Subobject X`. Together with https://github.com/leanprover-community/mathlib4/pull/29253, this will show existence of lubs in the poset of subobjects. This is a prerequisite of the [MTT project](https://github.com/kyoDralliam/model-theory-topos), which aims to use the internal language of toposes to reason about e.g. sheaves. t-category-theory 71/0 Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/CategoryTheory/Subobject/MonoOver.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] riccardobrasca
assignee:riccardobrasca
0-8011
2 hours ago
7-69683
7 days ago
12-36853
12 days
29896 themathqueen
author:themathqueen
chore(LinearAlgebra/Matrix/PosDef): deprecate `PosSemidef.sqrt` in favour of `CFC` We deprecate `PosSemidef.sqrt` and all related results in favour of using more general results (i.e., `CFC.sqrt` and results in C*-algebras). This also defines the partial order and `StarOrderedRing` instances on matrices. This also moves all results related to `PosSemidef.sqrt` to `Analysis/Matrix/Order` to minimize imports. The partial order instance on matrices is scoped to `MatrixOrder` (analogous to `ComplexOrder`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed large-import 295/278 Mathlib.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/Matrix/Order.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Basic.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,MathlibTest/PosDef.lean 7 49 ['github-actions', 'j-loreaux', 'loefflerd', 'mathlib4-merge-conflict-bot', 'themathqueen'] tb65536
assignee:tb65536
0-8010
2 hours ago
7-46838
7 days ago
9-9721
9 days
29916 themathqueen
author:themathqueen
chore: move some results from `Analysis/Normed/Algebra/Spectrum` to `Analysis/{Real, Complex}/Spectrum` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 130/74 Mathlib.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/Complex/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Real/Spectrum.lean 5 4 ['Ruben-VandeVelde', 'github-actions', 'mathlib4-merge-conflict-bot', 'themathqueen'] ADedecker
assignee:ADedecker
0-8009
2 hours ago
7-40680
7 days ago
10-30303
10 days
29924 pelicanhere
author:pelicanhere
feat(RingTheory): local properties of semilocal rings Proves local properties of semilocal rings, which wiil be used in Iwasawa theory. For a natural language proof, see [lean-iwasawa](https://acmepjz.github.io/lean-iwasawa/blueprint/sect0002.html#a0000000013) (slightly different from this PR). > > > > [![Open in Gitpod](https://camo.githubusercontent.com/b04f5659467d23b5109ba935a40c00decd264eea25c22d50a118021349eea94f/68747470733a2f2f676974706f642e696f2f627574746f6e2f6f70656e2d696e2d676974706f642e737667)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor 183/6 Mathlib.lean,Mathlib/RingTheory/DedekindDomain/PID.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/LocalProperties/IntegrallyClosed.lean,Mathlib/RingTheory/LocalProperties/Semilocal.lean,Mathlib/RingTheory/Localization/AtPrime/Basic.lean 6 45 ['github-actions', 'kckennylau', 'pelicanhere'] chrisflav
assignee:chrisflav
0-8009
2 hours ago
9-84874
9 days ago
9-84916
9 days
29969 smmercuri
author:smmercuri
refactor: use isometry extensions for completions at infinite places of number fields The API for `InfinitePlace.Completion` currently makes use of abstract results defined on absolute values, which all depend on the hypothesis of the form `∀ x, ‖f x‖ = v x`. This is equivalent to `f` being an isometry, and so many of these results can be bypassed and deprecated by using `Isometry.completion_extension` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 72/47 Mathlib/Analysis/Normed/Field/WithAbs.lean,Mathlib/NumberTheory/NumberField/AdeleRing.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Completion.lean,Mathlib/Topology/MetricSpace/Completion.lean 4 1 ['github-actions'] RemyDegenne
assignee:RemyDegenne
0-8008
2 hours ago
8-39638
8 days ago
8-39625
8 days
29982 hrmacbeth
author:hrmacbeth
feat: new `isolate` tactic This PR adds a new tactic, `isolate`, which "solves for x" in an equation or relation. For example: ```lean example (a b : ℝ) (f : ℝ → ℝ) : 5 * f a - 3 < b := by isolate f a -- new goal: `⊢ f a < (b + 3) / 5` ``` The `isolate` tactic may generate side goals, if these are necessary to justify the transformation. The tactic will attempt to justify such side goals using `positivity` (as in the above example), unification, or type class inference, but if unsuccessful will present them to the user. For example: ```lean example (a b c : ℝ) (f : ℝ → ℝ) : c * f a - 3 < b := by isolate f a -- new goal: `⊢ f a < (b + 3) / c` -- second (side) new goal: `⊢ 0 < c` ``` The `isolate` tactic is extensible. Coverage may be extended to new relations and new operations-to-be-undone by tagging appropriate lemmas with the new `@[isolate]` attribute. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-meta 863/3 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Data/Real/Sqrt.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Isolate.lean,Mathlib/Tactic/Isolate/Core.lean,Mathlib/Tactic/Isolate/Tagging.lean,Mathlib/Tactic/Relation/Symm.lean,MathlibTest/Isolate/Heavyweight.lean,MathlibTest/Isolate/Lightweight.lean,scripts/noshake.json 12 23 ['JovanGerb', 'PatrickMassot', 'github-actions', 'hrmacbeth', 'kim-em'] JovanGerb
assignee:JovanGerb
0-8007
2 hours ago
7-20150
7 days ago
7-20136
7 days
29988 pechersky
author:pechersky
chore(RingTheory/PrimitiveRoots): switch argument for `isUnit` from `0 < k` to `k ≠ 0` Did not do this for all lemmas in `IsPrimitiveRoot` namespace which is still heterogeneous between - `NeZero k` - `0 < k` - `k ≠ 0` Note: there will always be some mismatch in hypotheses, because core has lemmas about divisibility in `0 < k` hypothesis form On the way to describing the torsion subgroup, as requested in #29517 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
26/26 Mathlib/FieldTheory/KummerExtension.lean,Mathlib/NumberTheory/Cyclotomic/CyclotomicCharacter.lean,Mathlib/NumberTheory/Cyclotomic/Rat.lean,Mathlib/NumberTheory/MulChar/Lemmas.lean,Mathlib/RingTheory/Frobenius.lean,Mathlib/RingTheory/RootsOfUnity/EnoughRootsOfUnity.lean,Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean 7 4 ['Ruben-VandeVelde', 'github-actions'] riccardobrasca
assignee:riccardobrasca
0-8006
2 hours ago
7-80683
7 days ago
7-80759
7 days
29999 jeremypparker
author:jeremypparker
chore(Analysis/Fourier/AddCircle): remove stale comment --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis 0/1 Mathlib/Analysis/Fourier/AddCircle.lean 1 2 ['Ruben-VandeVelde', 'github-actions', 'jeremypparker'] sgouezel
assignee:sgouezel
0-8005
2 hours ago
7-63153
7 days ago
7-63189
7 days
30000 themathqueen
author:themathqueen
refactor(Analysis/InnerProductSpace/Positive): generalize definition to use `IsSymmetric` instead of `IsSelfAdjoint` and `CompleteSpace` The definition remains the same in complete spaces, but this allows us to use positivity and the partial order without needing completeness. To use the old definition (i.e., `IsSelfAdjoint` and ...), instead of unfolding, use `ContinuousLinearMap.isPositive_def`. `isPositive_iff` is renamed to `isPositive_iff'`, and `isPositive_iff` points to the same thing but with `IsSymmetric` instead of `IsSelfAdjoint`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 64/54 Mathlib/Analysis/InnerProductSpace/Positive.lean,Mathlib/Analysis/InnerProductSpace/StarOrder.lean 2 3 ['github-actions', 'themathqueen'] sgouezel
assignee:sgouezel
0-8004
2 hours ago
7-57372
7 days ago
7-63122
7 days
30144 alreadydone
author:alreadydone
feat(Data/Nat): reducible binaryRec --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data t-algebra
label:t-algebra$
77/55 Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean,Mathlib/Data/Nat/BinaryRec.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Size.lean 7 1 ['github-actions'] nobody
0-7826
2 hours ago
0-7826
2 hours ago
0-7867
2 hours
29788 robertmaxton42
author:robertmaxton42
feat (Topology): adds bundled continuous maps for sum, sigma, subtype, mapsto, inclusion Adds a collection of bundled continuous maps and homeomorphisms, and helper lemmas for working with their compositions. Bundling of existing continuity lemmas: * `ContinuousMap.subtypeVal` * `ContinuousMap.inl` and `.inr`; `ContinuousMap.sum` bundles `Continuous.sumElim`; `ContinuousMap.sumMap`, which is a quotient map when both components are quotient maps * `ContinuousMap.sigmaMap`, which is a quotient map when given a family of quotient maps * `ContinuousMap.mapsTo` bundles `ContinuousOn.restrict_mapsTo` New functions: * `ContinuousMap.preimageValIncl : C(s ↓∩ t, t)` and `.inclPreimageVal C(s, t ↓∩ s)`, and their unbundled functions in `Set` * `Homeomorph.Set.preimageVal` witnesses that the two are opposite directions of a homeomorphism * Descending from a coherent set of subspaces is a quotient map The primary use for these bundled maps is easy composition and the ability to introduce them by rewriting right-to-left: it is much more convenient to write `subtypeVal.comp _` than to use either the anonymous constructor (which doesn't work in any position without an expected type) or `ContinuousMap.mk` (which will disappear as soon as it is coerced to a function, making it difficult to use in mixed-categorical contexts where many maps can only be reduced by introducing a composition with some other map.) This PR is part of a family of PRs that ultimately construct transformations in both directions between the concrete `Topology.RelCWComplex` and abstract `TopCat.RelativeCWComplex`. `.mapsTo` in particular bundles together a couple of potentially nontrivial proofs in a way that makes them easy to refer to later; I use it and `.subtypeVal` particularly heavily later in a dependent PR to build the cell inclusion maps on both sides of the equivalence. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import 226/3 Mathlib/Data/Set/Subset.lean,Mathlib/Topology/Category/TopCat/Limits/Products.lean,Mathlib/Topology/Coherent.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/Constructions/SumProd.lean,Mathlib/Topology/ContinuousMap/Basic.lean,scripts/noshake.json 7 6 ['adamtopaz', 'github-actions', 'robertmaxton42'] adamtopaz
assignee:adamtopaz
0-5488
1 hour ago
0-5508
1 hour ago
15-1590
15 days
30154 YaelDillies
author:YaelDillies
chore(Order/Filter/Finite): clean up `protected alias` works now. Also write a module doc. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order easy ready-to-merge 4/11 Mathlib/Order/Filter/Finite.lean 1 2 ['Ruben-VandeVelde', 'bryangingechen', 'github-actions'] nobody
0-1621
27 minutes ago
0-1621
26 minutes ago
0-62681
17 hours
30155 grunweg
author:grunweg
chore(Lean/Elab/Term): reduce import to match file name This file only requires importing Lean.Elab.Term, and it's good practice anyway for the file name and only import to match. Discovering in #26221. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta easy ready-to-merge 1/1 Mathlib/Lean/Elab/Term.lean 1 2 ['bryangingechen', 'github-actions'] nobody
0-1596
26 minutes ago
0-1596
26 minutes ago
0-57897
16 hours
30156 grunweg
author:grunweg
chore(Lean/Expr/Basic): move material about rewriting to a new file These methods should go into Lean.Meta.Tactic.Rewrite instead, so move them to a new file. I credit Kim, Kyle and Patrick from #3801 for this; Kim's final clean-up eventually introduced these methods. With this moved, the imports for Lean.Expr.Basic can be reduced to just Lean.Expr, which we do. Noticed during work on #26221. ------- I expect this to not pass CI right away yet, e.g. the linarith imports might need fixing. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta easy delegated 48/25 Mathlib.lean,Mathlib/Lean/Expr/Basic.lean,Mathlib/Lean/Meta/Tactic/Rewrite.lean,Mathlib/Order/Defs/PartialOrder.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/DeprecateTo.lean,Mathlib/Tactic/Linarith/Preprocessing.lean,Mathlib/Tactic/ToAdditive/Frontend.lean,MathlibTest/Lint.lean 9 4 ['bryangingechen', 'github-actions', 'mathlib-bors'] nobody
0-1366
22 minutes ago
0-1366
22 minutes ago
0-52235
14 hours
28891 joelriou
author:joelriou
feat(Analysis/Convex): functoriality of the standard simplex When `f : X → Y` is a map between finite types, and `S` is an ordered semiring, we define the maps `stdSimplex.map f : stdSimplex S X → stdSimplex S Y`. In the case `S := ℝ`, we show that these maps are continuous. In a future PR #28893, the definition of the topological simplex in `AlgebraicTopology` shall be refactored. --- - [x] depends on: #28869 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry delegated 192/1 Mathlib.lean,Mathlib/Analysis/Convex/StdSimplex.lean,Mathlib/LinearAlgebra/Finsupp/Pi.lean,Mathlib/Topology/Algebra/Monoid/FunOnFinite.lean 4 6 ['YaelDillies', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] YaelDillies
assignee:YaelDillies
0-1012
16 minutes ago
0-69248
19 hours ago
34-40884
34 days
29820 wwylele
author:wwylele
feat(RingTheory): {Mv}PowerSeries.{le_}{weighted}Order_prod The big operator version of `{le}_{weighted}Order_mul` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory ready-to-merge 41/0 Mathlib/RingTheory/MvPowerSeries/NoZeroDivisors.lean,Mathlib/RingTheory/MvPowerSeries/Order.lean,Mathlib/RingTheory/PowerSeries/Order.lean 3 4 ['Ruben-VandeVelde', 'bryangingechen', 'github-actions', 'wwylele'] mattrobball
assignee:mattrobball
0-910
15 minutes ago
0-910
14 minutes ago
14-17831
14 days
30165 j-loreaux
author:j-loreaux
chore(Analysis/NormedSpace/Extend): deprecate module --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt t-analysis easy ready-to-merge 4/0 Mathlib.lean,Mathlib/Analysis/NormedSpace/Extend.lean 2 2 ['bryangingechen', 'github-actions'] nobody
0-851
14 minutes ago
0-851
13 minutes ago
0-47906
13 hours
28492 euprunin
author:euprunin
chore(Data/Finite): deprecate `card_le_of_injective`, `card_le_of_surjective` and `card_sum` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data ready-to-merge 14/27 Mathlib/CategoryTheory/Galois/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/WalkCounting.lean,Mathlib/Combinatorics/SimpleGraph/Tutte.lean,Mathlib/Data/Finite/Card.lean,Mathlib/GroupTheory/CommutingProbability.lean,Mathlib/GroupTheory/Index.lean 6 4 ['bryangingechen', 'euprunin', 'github-actions', 'tb65536'] nobody
0-741
12 minutes ago
0-741
11 minutes ago
13-27818
13 days
14720 eric-wieser
author:eric-wieser
refactor: change `CliffordAlgebra.lift` to use quadratic maps This works towards addressing a footnote on [page 152](https://eric-wieser.github.io/thesis/eric-wieser-thesis.pdf#page=164) of my thesis. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict WIP
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
429-68433
1 year ago
443-59428
1 year ago
0-0
0 seconds
14426 adomani
author:adomani
dev: `#min_imps` command --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 142/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MinImports.lean,test/MinImports.lean 4 2 ['adomani', 'github-actions'] nobody
429-68433
1 year ago
442-64814
1 year ago
0-0
0 seconds
14167 alreadydone
author:alreadydone
feat: Group scheme structure on Weierstrass curve --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) workshop-AIM-AG-2024 t-algebraic-geometry merge-conflict WIP 727/41 Mathlib.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Scheme.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Universal.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/GroupTheory/MonoidLocalization.lean,Mathlib/LinearAlgebra/Basis.lean,Mathlib/LinearAlgebra/FreeModule/Basic.lean,Mathlib/RingTheory/AlgebraTower.lean,Mathlib/RingTheory/MvPolynomial/Basic.lean 12 3 ['Multramate', 'github-actions', 'jcommelin'] nobody
429-68432
1 year ago
442-56043
1 year ago
0-0
0 seconds
13847 alreadydone
author:alreadydone
feat(EllipticCurve): the universal elliptic curve + Define the universal Weierstrass curve (`Universal.curve`) over the polynomial ring `ℤ[A₁,A₂,A₃,A₄,A₆]`, and the universal pointed elliptic curve (`Universal.pointedCurve`) over the field of fractions (`Universal.Field`) of the universal ring `ℤ[A₁,A₂,A₃,A₄,A₆,X,Y]/⟨P⟩ = Universal.Poly/⟨P⟩` (`Universal.Ring`, where `P` is the Weierstrass polynomial) with distinguished point `(X,Y)`. + Given a Weierstrass curve `W` over a commutative ring `R`, we define the specialization homomorphism `W.specialize : ℤ[A₁,A₂,A₃,A₄,A₆] →+* R`. If `(x,y)` is a point on the affine plane, we define `W.polyEval x y : Universal.Poly →+* R`, which factors through `W.ringEval x y : Universal.Ring →+* R` if `(x,y)` is on `W`. + Introduce the cusp curve `Y² = X³`, on which lies the rational point `(1,1)`, with the nice property that `ψₙ(1,1) = n`, making it easy to prove nonvanishing of the universal `ψₙ` when `n ≠ 0` by specializing to the cusp curve, which shows that `(X,Y)` is a point of infinite order on the universal pointed elliptic curve. --- - [x] depends on: #13845 - [x] depends on: #12883 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-algebraic-geometry merge-conflict awaiting-author
label:t-algebra$
543/208 Mathlib.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Universal.lean 6 4 ['Multramate', 'alreadydone', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
429-68432
1 year ago
463-8729
1 year ago
0-0
0 seconds
14036 adomani
author:adomani
Test/decl diff in lean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 465/1040 .github/workflows/Lean_decl_diff.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,.github/workflows/mk_build_yml.sh,scripts/decls_diff_hybrid.sh,scripts/list_decls.lean 8 1 ['github-actions'] nobody
429-68432
1 year ago
467-66723
1 year ago
0-0
0 seconds
13297 urkud
author:urkud
feat(Semicontinuous): add `comp` lemma --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order t-topology merge-conflict awaiting-author 31/13 Mathlib/Topology/Semicontinuous.lean 1 3 ['sgouezel', 'urkud'] nobody
429-68431
1 year ago
441-46162
1 year ago
0-18175
5 hours
13372 adomani
author:adomani
dev: generic replacement --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 446/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/ReplaceRefine.lean,Mathlib/Tactic/Replacements.lean 4 4 ['adomani', 'github-actions'] nobody
429-68431
1 year ago
471-63340
1 year ago
0-0
0 seconds
13512 adomani
author:adomani
test: count all --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 85/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/Tally.lean 4 0 [] nobody
429-68431
1 year ago
471-63213
1 year ago
0-0
0 seconds
12416 adomani
author:adomani
chore: remove some cdots --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 3830/3239 Archive/Imo/Imo1972Q5.lean,Archive/Imo/Imo2006Q5.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2021Q1.lean,Archive/Wiedijk100Theorems/AbelRuffini.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/BirthdayProblem.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Archive/Wiedijk100Theorems/Partition.lean,Counterexamples/Cyclotomic105.lean,Counterexamples/DirectSumIsInternal.lean,Mathlib.lean,Mathlib/Algebra/Algebra/Spectrum.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/List/Basic.lean,Mathlib/Algebra/Category/GroupCat/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Images.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/CharP/Quotient.lean,Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/DirectLimit.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/GCDMonoid/Finset.lean,Mathlib/Algebra/GeomSum.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/GroupPower/Order.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/Algebra/Homology/Exact.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplex.lean,Mathlib/Algebra/Homology/HomotopyCategory/Triangulated.lean,Mathlib/Algebra/Homology/LocalCohomology.lean,Mathlib/Algebra/Homology/TotalComplex.lean,Mathlib/Algebra/Lie/DirectSum.lean,Mathlib/Algebra/Lie/IdealOperations.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Lie/Weights/Basic.lean,Mathlib/Algebra/Module/DedekindDomain.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/Module/LocalizedModule.lean,Mathlib/Algebra/Module/PID.lean,Mathlib/Algebra/Module/Submodule/Bilinear.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/Module/Zlattice/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/MonoidAlgebra/Ideal.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Order/Archimedean.lean,Mathlib/Algebra/Order/BigOperators/Group/List.lean,Mathlib/Algebra/Order/CauSeq/BigOperators.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Int.lean,Mathlib/Algebra/Order/Group/MinMax.lean,Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Algebra/Order/Pointwise.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Polynomial/PartialFractions.lean,Mathlib/Algebra/Polynomial/Reverse.lean,Mathlib/Algebra/Polynomial/RingDivision.lean,Mathlib/Algebra/Polynomial/UnitTrinomial.lean,Mathlib/Algebra/Quandle.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/AlgebraicGeometry/FunctionField.lean,Mathlib/AlgebraicGeometry/Gluing.lean,Mathlib/AlgebraicGeometry/Morphisms/Basic.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiCompact.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiSeparated.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/AlgebraicGeometry/Pullbacks.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/SimplexCategory.lean,Mathlib/AlgebraicTopology/SplitSimplicialObject.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/BoundedVariation.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Extend.lean,Mathlib/Analysis/Calculus/InverseFunctionTheorem/ApproximatesLinearOn.lean,Mathlib/Analysis/Calculus/LocalExtr/Basic.lean,Mathlib/Analysis/Calculus/ParametricIntegral.lean,Mathlib/Analysis/Calculus/TangentCone.lean 608 0 [] nobody
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521-70428
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12528 adomani
author:adomani
test: autotranslations Bot --> Top --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 350/294 Mathlib.lean,Mathlib/Order/WithBot.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MinMax.lean,test/MinMax.lean 5 0 [] nobody
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499-68572
1 year ago
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12679 MichaelStollBayreuth
author:MichaelStollBayreuth
perf(NumberTheory/RamificationInertia): speed up slow file A repetition of the earlier experiment at [#12412](https://github.com/leanprover-community/mathlib4/pull/12412) with Lean 4.8.0-rc1. This time, I tried not to introduce local instances if possible, but instead to tweak instance priorities. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 57/14 Mathlib/NumberTheory/RamificationInertia.lean 1 3 ['MichaelStollBayreuth', 'github-actions', 'leanprover-bot'] nobody
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12933 grunweg
author:grunweg
chore: replace some use of > or ≥ by < or ≤ These were flagged by the linter in #12879: it is easy to simple avoid > or ≥ in hypotheses or `have`s. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 123/123 Archive/Imo/Imo1960Q1.lean,Archive/Imo/Imo1962Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q4.lean,Archive/Imo/Imo2011Q5.lean,Archive/Imo/Imo2019Q4.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/Order/CauSeq/BigOperators.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Star/CHSH.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Analysis/Normed/Group/ControlledClosure.lean,Mathlib/Analysis/SpecialFunctions/Log/Base.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/FP/Basic.lean,Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Nat/Dist.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Nat/Parity.lean,Mathlib/Data/Ordmap/Ordset.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/UInt.lean,Mathlib/GroupTheory/Coxeter/Length.lean,Mathlib/MeasureTheory/Constructions/Polish.lean,Mathlib/MeasureTheory/Covering/Besicovitch.lean,Mathlib/MeasureTheory/Covering/Vitali.lean,Mathlib/MeasureTheory/Covering/VitaliFamily.lean,Mathlib/MeasureTheory/Integral/Layercake.lean,Mathlib/NumberTheory/LegendreSymbol/JacobiSymbol.lean,Mathlib/NumberTheory/Padics/Hensel.lean,Mathlib/NumberTheory/Padics/PadicNorm.lean,Mathlib/NumberTheory/PellMatiyasevic.lean,Mathlib/NumberTheory/Rayleigh.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/Tactic/CancelDenoms/Core.lean,Mathlib/Tactic/IntervalCases.lean,Mathlib/Tactic/Linarith/Lemmas.lean,Mathlib/Tactic/Linarith/Oracle/FourierMotzkin.lean,Mathlib/Tactic/NormNum/GCD.lean,Mathlib/Tactic/NormNum/Inv.lean,Mathlib/Tactic/Ring/Basic.lean,Mathlib/Topology/Category/Profinite/Nobeling.lean,Mathlib/Topology/ContinuousFunction/Bounded.lean,Mathlib/Topology/MetricSpace/CauSeqFilter.lean,Mathlib/Topology/Sequences.lean,test/LibrarySearch/basic.lean,test/Use.lean,test/cancel_denoms.lean,test/linarith.lean,test/norm_cast.lean 64 6 ['YaelDillies', 'github-actions', 'grunweg'] nobody
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442-78021
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0-55655
15 hours
12608 eric-wieser
author:eric-wieser
feat: allow `nsmul` / `zsmul` to be omitted again, with a warning --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-meta merge-conflict awaiting-author
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
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5-72414
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12934 grunweg
author:grunweg
chore: replace more uses of > or ≥ by < or ≤ These were flagged by the linter in https://github.com/leanprover-community/mathlib4/pull/12879: it is easy to simple avoid > or ≥ in hypotheses or haves. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author help-wanted 41/42 Archive/Imo/Imo1962Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2019Q4.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib/Tactic/Linarith/Datatypes.lean,test/cancel_denoms.lean,test/congr.lean,test/interval_cases.lean,test/observe.lean 15 11 ['YaelDillies', 'adomani', 'github-actions', 'grunweg', 'jcommelin', 'urkud'] nobody
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442-78027
1 year ago
1-73101
1 day
12588 adomani
author:adomani
remove trailingDegree --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1280/979 Mathlib.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Degree/TrailingDegree.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/Mirror.lean,Mathlib/Order/WithBot.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MinMax.lean,Mathlib/Tactic/MinMaxTwo.lean,test/MinMax.lean 11 0 [] nobody
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517-72006
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12637 adomani
author:adomani
translation: MonoidAlgebra to AddMonoidAlgebra [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/merge.20Add-MonoidAlgebra) * #12646 was found as a consequence of unification. * #12659 the typo `single 1 1` for `single 0 1`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-meta merge-conflict
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
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12465 rosborn
author:rosborn
style: Change Subtype.val to (↑) --- This is a test to see replacing `Subtype.val` with `(↑)` where appropriate. After performing the rewrite, some of the types subtly changed in a difficult to detect manner. Before the change, `openEmbedding' _` had type `OpenEmbedding Subtype.val` where `Subtype.val` expanded as `@Subtype.val α fun x ↦ x ∈ U : ↥U → α`. After the change, `Subtype.val` expands to `@Subtype.val α fun x ↦ x ∈ ↑U : { x // x ∈ ↑U } → α`. This caused some later proofs to fail due to the different definition. In a similar case, within the proof of `mfderiv_coe_sphere_injective` on line 553 `Subtype.val` expanded as `@Subtype.val E fun x ↦ x ∈ (Submodule.span ℝ {↑(-v)})ᗮ : ↥(Submodule.span ℝ {↑(-v)})ᗮ → E`. After changing to `(↑)`, it expanded to `@Subtype.val E fun x ↦ x ∈ ↑(Submodule.span ℝ {↑(-v)})ᗮ : { x // x ∈ ↑(Submodule.span ℝ {↑(-v)})ᗮ } → E`. One benefit to using `(↑)` was that it lead to a shorter proof as `ContinuousLinearEquiv.coe_coe` could be removed on line 559. In general, this subtle change in types is basically impossible to detect without a tool like leaff. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 50/50 Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/Normed/Group/Hom.lean,Mathlib/CategoryTheory/Generator.lean,Mathlib/CategoryTheory/Limits/Shapes/Types.lean,Mathlib/CategoryTheory/Subobject/Types.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Set/Function.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/Geometry/Manifold/ContMDiff/Basic.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/Geometry/Manifold/LocalInvariantProperties.lean,Mathlib/GroupTheory/Subsemigroup/Operations.lean,Mathlib/LinearAlgebra/LinearIndependent.lean,Mathlib/Order/Directed.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/Order/RelIso/Set.lean,Mathlib/RingTheory/Artinian.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/PGame.lean,Mathlib/SetTheory/Surreal/Basic.lean,Mathlib/Topology/Bornology/Constructions.lean,Mathlib/Topology/EMetricSpace/Lipschitz.lean,Mathlib/Topology/Germ.lean,Mathlib/Topology/UniformSpace/Basic.lean,Mathlib/Topology/UniformSpace/UniformConvergenceTopology.lean,Mathlib/Topology/UniformSpace/UniformEmbedding.lean 28 1 ['eric-wieser', 'rosborn'] nobody
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12936 mattrobball
author:mattrobball
chore(Quiver.Opposite): make `Quiver.Hom.op/unop` `abbrev`'s These are wrappers around the constructor and projection for `Opposite Quiver.Hom _ _`. The projection itself is reducible and with structure eta built in to defeq it seems like we might be making Lean work harder than is necessary. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 39/34 Mathlib/Algebra/Homology/ShortComplex/Homology.lean,Mathlib/Algebra/Homology/ShortComplex/RightHomology.lean,Mathlib/CategoryTheory/Idempotents/Basic.lean,Mathlib/CategoryTheory/Limits/HasLimits.lean,Mathlib/CategoryTheory/Limits/Opposites.lean,Mathlib/CategoryTheory/Opposites.lean,Mathlib/CategoryTheory/Sites/CoverLifting.lean,Mathlib/CategoryTheory/Subobject/Comma.lean,Mathlib/CategoryTheory/Triangulated/Opposite.lean,Mathlib/Combinatorics/Quiver/Basic.lean 10 9 ['YaelDillies', 'kim-em', 'leanprover-bot', 'mattrobball'] nobody
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12473 adomani
author:adomani
first translations --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 424/265 Mathlib.lean,Mathlib/Order/Lattice.lean,Mathlib/Order/WithBot.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MinMax.lean 5 0 [] nobody
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499-68573
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12192 Ruben-VandeVelde
author:Ruben-VandeVelde
feat: generalize isLittleO_const_id_atTop/atBot From PNT+. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict awaiting-author 10/4 Mathlib/Analysis/Asymptotics/Asymptotics.lean 1 6 ['Ruben-VandeVelde', 'llllvvuu', 'urkud'] nobody
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441-46296
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11617 urkud
author:urkud
refactor(Finset): redefine Finset.diag, review API Redefine `Finset.diag` using `Finset.map`. The new definition doesn't rely on `DecidableEq` and is much more computationally efficient. Also review API and golf proofs here and there. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic merge-conflict awaiting-author 187/181 Archive/Imo/Imo1998Q2.lean,Mathlib.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Energy.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Increment.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Uniform.lean,Mathlib/Data/Finset/Diag.lean,Mathlib/Data/Finset/Image.lean,Mathlib/Data/Finset/Prod.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Data/Sym/Card.lean,Mathlib/Data/Sym/Sym2.lean 13 7 ['YaelDillies', 'eric-wieser', 'urkud'] nobody
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552-20159
1 year ago
1-12270
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11100 eric-wieser
author:eric-wieser
feat(CategoryTheory/Limits): add `Functor.mapBinaryBiconeInv` --- - [ ] depends on: #11130 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) It's tempting to try to prove something like ```lean theorem Functor.mapBinaryBiconeInv_toCone [Limits.HasZeroMorphisms C] [Limits.HasZeroMorphisms D] (e : D ⥤ C) [IsEquivalence e] {X Y : D} (b : BinaryBicone (e.obj X) (e.obj Y)) : (e.mapBinaryBiconeInv b).toCone = (e.mapConeInv <| (Cones.postcompose (pairComp X Y e).symm.hom).obj b.toCone) := by simp sorry theorem Functor.mapBinaryBiconeInv_toCocone [Limits.HasZeroMorphisms C] [Limits.HasZeroMorphisms D] (e : D ⥤ C) [IsEquivalence e] {X Y : D} (b : BinaryBicone (e.obj X) (e.obj Y)) : (e.mapBinaryBiconeInv b).toCocone = (e.mapCoconeInv <| (Cocones.precompose (pairComp X Y e).hom).obj b.toCocone) := by sorry ``` but maybe equality is evil here t-category-theory awaiting-CI merge-conflict 52/0 Mathlib/CategoryTheory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Biproducts.lean 3 6 ['TwoFX', 'eric-wieser', 'leanprover-community-mathlib4-bot'] nobody
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10845 Shamrock-Frost
author:Shamrock-Frost
Refactor: Make MonoidalFunctor carry the data of an inverse We change the definition of a strong monoidal functor from a lax monoidal functor for which the unitor and tensorator are `IsIso` to a lax monoidal functor with the data of inverses for the unitor and tensorator. This requires fixing a lot of knock on effects. --- This is a **draft PR**. I would like to talk with people on zulip before merging it, and plan ahead to when we have oplax/colax monoidal functors as well. I'm not sure the approach I took here where `MonoidalFunctor` inherits from `LaxMonoidalFunctor` is a good choice if we want to be lax/oplax symmetric. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory RFC merge-conflict WIP 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
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585-6561
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10594 lecopivo
author:lecopivo
feat: `fun_trans` function transformation tactic e.g. for computing derivatives feat: `fun_trans` function transformation tactic e.g. for computing derivatives Function transformation tactic/simproc. For example it can be used for computing derivatives. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict WIP 1819/56 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/Decl.lean,Mathlib/Tactic/FunProp/Elab.lean,Mathlib/Tactic/FunProp/FunctionData.lean,Mathlib/Tactic/FunProp/MorExt.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/FunTrans/Attr.lean,Mathlib/Tactic/FunTrans/Core.lean,Mathlib/Tactic/FunTrans/Decl.lean,Mathlib/Tactic/FunTrans/Elab.lean,Mathlib/Tactic/FunTrans/Theorems.lean,Mathlib/Tactic/FunTrans/Types.lean,test/fun_prop2.lean,test/fun_prop_dev.lean,test/fun_trans_dev.lean 17 11 ['github-actions'] nobody
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10721 urkud
author:urkud
feat(Order/FunLike): define `PointwiseLE` - introduce a mixin class `DFunLike.PointwiseLE`, use it to define `DFunLike.instPartialOrder`; - add a generic `DFunLike.orderEmbeddingCoe` - add `DFunLike.PointwiseLE` instances here and there. With this refactor and #13022, I'm going to generalize lemmas like `MeasureTheory.ae_mono` to `OuterMeasureClass`. --- - [x] depends on: #12983 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic t-order merge-conflict 123/50 Mathlib.lean,Mathlib/Algebra/Order/Hom/Ring.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Dynamics/Circle/RotationNumber/TranslationNumber.lean,Mathlib/GroupTheory/Congruence.lean,Mathlib/Order/FunLike.lean,Mathlib/Order/Heyting/Hom.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Hom/Bounded.lean,Mathlib/Order/Hom/CompleteLattice.lean,Mathlib/Topology/Order/Hom/Basic.lean 13 48 ['YaelDillies', 'dupuisf', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
429-68428
1 year ago
451-49130
1 year ago
64-12826
64 days
10521 eric-wieser
author:eric-wieser
chore: generalize `IsBoundedLinearMap` to modules Most of the lemmas don't actually need the normed on the scalars at all. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict awaiting-author 58/42 Mathlib/Analysis/NormedSpace/BoundedLinearMaps.lean 1 3 ['github-actions', 'j-loreaux', 'urkud'] nobody
429-68428
1 year ago
536-82490
1 year ago
1-29105
1 day
10024 ADedecker
author:ADedecker
feat: rename `connectedComponentOfOne` to `identityComponent`, prove that it is normal and open --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-CI merge-conflict 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
429-68428
1 year ago
441-46885
1 year ago
0-832
13 minutes
8582 eric-wieser
author:eric-wieser
wip --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 3/7 Mathlib/Algebra/Category/AlgebraCat/Monoidal.lean,Mathlib/LinearAlgebra/TensorProduct.lean 2 4 ['eric-wieser', 'leanprover-bot'] nobody
429-68427
1 year ago
680-55283
1 year ago
0-0
0 seconds
8503 thorimur
author:thorimur
feat: meta utils for `refine?` This PR introduces some metaprogramming infrastructure and utilities that are necessary for `refine?` (#8364). * `elabTermWithHoles'` (and `withCollectingNewGoalsFrom'`): a more configurable version of `elabTermWithHoles`, which allows: preserving the initial mvar type; *not* tagging untagged goals; and postponing mvars. * Some `Syntax` and `TSyntax` functionality, including: * `TSyntax.map`(`M`), for acting on `TSyntax` with functions `f : Syntax -> (m) Syntax` * Range operations: `includes` and `isEqByRange` * `setTrailingInfoBy?` and `unsetOriginalTrailing`, which is like `unsetTrailing`, but behaves as expected. * `Term.withoutModifyingState`, which does not allow unknown mvarIds to escape via the infotree * `hasNewErrors`, which runs a monad computation and returns the value along with `true` or `false` depending on whether new error messages have been logged * the option `pp.anonymousMVarSuffixes`, which can be set to `false` to replace all numeric suffixes of anonymous mvars with `✝`, which is useful in tandem with `#guard_msgs` for tests (but is essentially a workaround—although it can make some tactic states more legible). --- I'm open to suggestions on the location and name of the option/delaborator used for trimming the numeric suffixes of anonymous mvar names (which is used in the tests)—including whether or not it should exist in the first place, as it's essentially just a workaround. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict awaiting-author 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
429-68427
1 year ago
631-78725
1 year ago
38-46649
38 days
8616 eric-wieser
author:eric-wieser
feat(Algebra/FreeAlgebra): add right action and `IsCentralScalar` --- - [ ] depends on: #8652 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-CI merge-conflict
label:t-algebra$
30/8 Mathlib/Algebra/FreeAlgebra.lean 1 1 ['leanprover-community-mathlib4-bot'] nobody
429-68427
1 year ago
451-49130
1 year ago
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8658 eric-wieser
author:eric-wieser
feat: support right actions for `Con` This adds a new `Con.CompatibleSMul` typeclass that captures exactly the condition when `smul` descends to the quotient. I was not quite able to merge this with `MulAction.QuotientAction`: * The imports are such that the congruence relation `QuotientGroup.con` is not yet available in that file * `QuotientGroup.con` requires the subgroup to be normal, while `MulAction.QuotientAction` does not --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author
label:t-algebra$
80/18 Mathlib/GroupTheory/Congruence.lean,Mathlib/RingTheory/Congruence.lean 2 6 ['YaelDillies', 'eric-wieser'] nobody
429-68427
1 year ago
479-47081
1 year ago
29-65537
29 days
8961 eric-wieser
author:eric-wieser
refactor: use the coinduced topology on ULift --- - [x] depends on: #8958 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-CI merge-conflict please-adopt awaiting-author 46/14 Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Topology/Bornology/Constructions.lean,Mathlib/Topology/Constructions.lean 3 6 ['eric-wieser', 'github-actions', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
429-68427
1 year ago
617-60671
1 year ago
0-0
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8788 FMLJohn
author:FMLJohn
feat(Algebra/Module/GradeZeroModule): if `A` is a graded semiring and `M` is a graded `A`-module, then each grade of `M` is a module over the 0-th grade of `A`. --- - [ ] depends on: #8187 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
237/4 Mathlib.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Module/GradeZeroModule.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/Noetherian.lean 6 4 ['FMLJohn', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
429-68427
1 year ago
463-56329
1 year ago
0-0
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9487 eric-wieser
author:eric-wieser
feat: the exponential of dual numbers over non-commutative rings This is a work in progress, as I don't know my way around the measure theory library. --- - [x] depends on: #9489 - [x] depends on: #9486 - [x] depends on: #10427 - [ ] depends on: #10452 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability t-algebra t-analysis merge-conflict WIP
label:t-algebra$
97/0 Mathlib/Analysis/NormedSpace/TrivSqZeroExt.lean 1 7 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
429-68427
1 year ago
434-63496
1 year ago
0-0
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9564 AntoineChambert-Loir
author:AntoineChambert-Loir
weaken commutativity assumptions for AdjoinRoot.lift and AdjoinRoot.liftHom I weaken a commutativity assumption for docs#AdjoinRoot.liftHom that the target algebra be commutative. It is only assumed to be a Semiring. For that, I need to generalize docs#AdjoinRoot.lift which takes `i : R ->+* S`, `a : S` with `f.eval₂ i a = 0` and defines `AdjoinRoot f ->+* S` that extends `i ` and sends `AdjoinRoot.root f` to `a`. --- The initial version of the PR was to define `AdjoinRoot.lift'` where `S` is only a Semiring, with the additional assumption `hcomm : ∀ r, Commute (i r) a` that the element `a` commutes with the image of `i`. @jcommelin suggested to provide this argument as an `autoParam`, filled in by an ad hoc `commutativity` tactic. However, such an argument cannot be made implicit and a first version required to have this argument given each time, most of the time by `_`, even for all subsequent lemmas, `AdjoinRoot.lift_mk`, etc. To avoid this, I tried to make this assumption a `⦃hcomm : ∀ r, Commute (i r) a⦄`. This appears to have some side effects that proofs using an `exact` tactic or in term mode do not work well, but one can resort on `by simp […]`. Maybe @eric-wieser or @Vierkantor will have opinions on that. In some cases one can still give the argument as `(hcomm := by commutativity)`. (There are 3 options : - separate lemmas for the fully commutative case and for the case where a proof is needed - using the `commutativity` tactic, but with an argument `_` sometimes - using the optional argument.) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict WIP
label:t-algebra$
146/30 Mathlib.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Group/Commute/Defs.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Commutativity.lean,Mathlib/Tactic/Commutativity/Init.lean 8 14 ['AntoineChambert-Loir', 'Vierkantor', 'eric-wieser', 'jcommelin'] nobody
429-68427
1 year ago
451-49130
1 year ago
16-24540
16 days
9504 alreadydone
author:alreadydone
chore: remove some IsSeparable assumptions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict WIP
label:t-algebra$
41/14 Mathlib/NumberTheory/NumberField/Norm.lean,Mathlib/RingTheory/Norm.lean 2 0 [] nobody
429-68427
1 year ago
518-43211
1 year ago
0-0
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8585 thorimur
author:thorimur
chore: bench lean4#2944 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1/1 lean-toolchain 1 2 ['leanprover-bot', 'thorimur'] nobody
429-68427
1 year ago
680-73605
1 year ago*
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9642 eric-wieser
author:eric-wieser
refactor(Analysis/Normed/{Group/Field}/Basic): Let `extends` generate the repeated fields New-style structure shenanigans mean that instance constructors randomly complain about a missing field that can be found with `__ : MetricSpace _ := infer_instance`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) I will write a longer PR description for this once CI is happy t-analysis merge-conflict awaiting-author WIP help-wanted 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
429-68427
1 year ago
607-48329
1 year ago
0-0
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8519 eric-wieser
author:eric-wieser
refactor(LinearAlgebra/TensorProduct): golf using `liftAddHom` This new `TensorProduct.liftAddHom` doesn't require bilinearity, only that scalar multiplication can be moved between the arguments. While in theory we only need the `AddMonoidHom` version as it offers exactly the same generality, we first provide an unbundled `liftFun` as this seems to give a sizeable performance boost if used in downstream `lift` variants. --- - [x] depends on: #8571 - [x] depends on: #8584 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author
label:t-algebra$
53/50 Mathlib/Algebra/Category/AlgebraCat/Monoidal.lean,Mathlib/LinearAlgebra/TensorProduct.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean 3 28 ['bustercopley', 'eric-wieser', 'jcommelin', 'jjaassoonn', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib-bors'] nobody
429-68427
1 year ago
578-40742
1 year ago
5-6524
5 days
9356 alexjbest
author:alexjbest
feat: assumption? A little helper for replacing `assumption`s with `exact` statements quickly --- If this is approved I will add tests This begs the question of whether it might simply be better to add some sort of code action for "replace with trythis output" [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict awaiting-author 24/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/TryAssumption.lean 4 5 ['alexjbest', 'j-loreaux', 'jcommelin'] nobody
429-68427
1 year ago
613-2424
1 year ago
19-26304
19 days
9252 FR-vdash-bot
author:FR-vdash-bot
chore: remove redundant covariance instances, add priority I noticed that the following code is surprisingly slow. ``` lean import Mathlib count_heartbeats in example {n : ℕ} : CovariantClass (Fin (n + 1)) (Fin (n + 1)) (· + ·) (· < ·) := by try infer_instance sorry ``` This PR removed some redundant instances. The heartbeats have dropped from 19118 to 11450 (still too slow). Lean4 still seems to make some redundant attempts. See also https://github.com/leanprover-community/mathlib4/issues/6646#issuecomment-1691792488. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) slow-typeclass-synthesis t-order t-algebra merge-conflict awaiting-author WIP
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 ['FR-vdash-bot', 'leanprover-bot', 'urkud'] nobody
429-68427
1 year ago
488-25452
1 year ago
0-0
0 seconds
8906 jjaassoonn
author:jjaassoonn
feat: add some missing lemmas about linear algebra --- - [ ] depends on: #8905 [lifting injective modules to higher universe] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author
label:t-algebra$
45/1 Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Module/Injective.lean,Mathlib/LinearAlgebra/Basic.lean,Mathlib/LinearAlgebra/BilinearMap.lean 4 21 ['AntoineChambert-Loir', 'alreadydone', 'jjaassoonn', 'leanprover-community-mathlib4-bot'] nobody
429-68427
1 year ago
531-18156
1 year ago
0-0
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9570 eric-wieser
author:eric-wieser
feat(Algebra/Star): Non-commutative generalization of `StarModule` [Zulip thread](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Star.20modules.20over.20non-commutative.20scalars/near/383664005). Until we address #7152, we have to have both `StarModule` and `StarModule'`. To prove this generalization is useful, this shows that with it as an assumption, `TrivSqZeroExt` is a `StarRing`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-CI merge-conflict WIP
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
429-68427
1 year ago
522-58633
1 year ago
0-0
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9354 chenyili0818
author:chenyili0818
feat: monotonicity of gradient on convex real-valued functions This file is based on Mathlib.Analysis.Calculus.Gradient.Basic, and describes the calculation properties co-authored-by: Ziyu Wang [tropicalfish910@gmail.com](mailto:tropicalfish910@gmail.com) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict awaiting-author 540/0 Mathlib.lean,Mathlib/Analysis/Convex/ConvexFunction.lean 2 15 ['github-actions', 'winstonyin'] nobody
429-68427
1 year ago
560-35116
1 year ago
22-72922
22 days
9482 yuma-mizuno
author:yuma-mizuno
refactor(CategoryTheory/Monoidal): add `LaxMonoidalStruct` Add a `LaxMonoidalStruct` with only the unit morphism `ε` and the tensorator `μ`. This is used in #6307 to provide two different constructors for `LaxMonoidal` that have common `ε` and `μ` but use the tensor of morphisms or the whiskerings. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict WIP 21/8 Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/CategoryTheory/Monoidal/Functorial.lean,Mathlib/CategoryTheory/Monoidal/Limits.lean 3 0 [] nobody
429-68427
1 year ago
617-72276
1 year ago
0-0
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9146 laughinggas
author:laughinggas
feat(Data/ZMod/Defs): Topological structure on `ZMod` Added a discrete topology structure to `ZMod n` for all `n` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology merge-conflict awaiting-author
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
429-68427
1 year ago
610-76555
1 year ago
7-6153
7 days
9229 eric-wieser
author:eric-wieser
refactor(Algebra/GradedMonoid): Use `HMul` to define `GMul` This make the notation much nicer, but I'm pretty sure this is a bad idea for performance / ambiguity reasons. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict WIP
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
429-68427
1 year ago
593-58144
1 year ago
0-0
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6580 adomani
author:adomani
chore: `move_add`-driven replacements This PR accompanies #6576 and uses `move_add/mul` to simplify/streamline a selection of proofs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 12/13 Counterexamples/Monic_nonRegular.lean,Mathlib/Algebra/Associated.lean,Mathlib/Data/Polynomial/RingDivision.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean 4 0 [] nobody
429-68426
1 year ago
546-56858
1 year ago
0-0
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6630 MohanadAhmed
author:MohanadAhmed
feat: Reduced Spectral Theorem For A hermitian matrix $A : n \times n$ with rank $A.rank \leq n$, we can eliminate the zero eigenvalues and their corresponding eigenvectors from the (alternate) spectral theorem. As such the matrix $A$ can be written as: $$A = V₁ D V₁ᴴ$$ where - $V₁$ : $n \times r$ is the matrix of eigenvector with non-zero associated eigenvalues. - $D$ is $r \times r$ is the diagonal matrix containing only non-zero eigenvalues on its main diagonal. with $r = A.rank$ being the rank of the matrix Towards that goal we make several equivalence definitions: - `{i // hA.eigenvalues i ≠ 0} ≃ Fin (A.rank)` the set of non-zero eigenvalues can be indexed by the numbers from 0 to (r - 1). - `{i // ¬ hA.eigenvalues i ≠ 0} ≃ Fin (n - A.rank)` the set of non-zero eigenvalues can be indexed by the numbers from 0 to (n - r - 1). - `{i // hA.eigenvalues i ≠ 0} ⊕ {i // ¬hA.eigenvalues i ≠ 0} ≃ n`: the index set of the matrix (together with the associated eigenvector matrix and eigenvalues matrix ) can be partitioned into two complement groups the ones corresponding to non-zero eigenvalues and the ones corresponding to zero eigenvalues. - We can then put the previous definitions together to obtain a: `Fin (A.rank) ⊕ Fin (Fintype.card n - A.rank) ≃ n` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict WIP
label:t-algebra$
31/0 Mathlib/LinearAlgebra/Matrix/Spectrum.lean 1 0 [] nobody
429-68426
1 year ago
441-47143
1 year ago
0-0
0 seconds
6930 kmill
author:kmill
feat: `resynth_instances` tactic for resynthesizing instances in the goal or local context This tactic can be useful for debugging non-canonical instances or for fixing up goals and hypotheses after using the `classical` tactic. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict WIP 327/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ResynthInstances.lean,test/ResynthInstances.lean 4 0 [] nobody
429-68426
1 year ago
760-42449
2 years ago
0-0
0 seconds
6931 urkud
author:urkud
refactor(Analysis/Normed*): use `RingHomIsometric` for `*.norm_cast` --- I don't understand why linter fails. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict help-wanted 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
429-68426
1 year ago
451-49130
1 year ago
0-0
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7427 MohanadAhmed
author:MohanadAhmed
Mohanad ahmed/sort eigenvalues abs In the file `Analysis.InnerProductSpace.Spectrum` todo notes were left saying: > TODO Postcompose with a permutation so that these eigenvectors are listed in increasing order of eigenvalue. > TODO Postcompose with a permutation so that these eigenvalues are listed in increasing order. - This is a start in that direction --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 162/4 Mathlib/Analysis/InnerProductSpace/Spectrum.lean,Mathlib/Analysis/NormedSpace/PiLp.lean,Mathlib/LinearAlgebra/Matrix/Spectrum.lean 3 0 [] nobody
429-68426
1 year ago
607-8723
1 year ago
0-0
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7467 ADedecker
author:ADedecker
feat: spectrum of X →ᵇ ℂ is StoneCech X --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict WIP 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
429-68426
1 year ago
591-17438
1 year ago
0-0
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7351 shuxuezhuyi
author:shuxuezhuyi
feat(Topology/Algebra/Order): extend function on `Ioo` to `Icc` Extend a strictly monotone function defined on an open interval. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict awaiting-author 59/0 Mathlib.lean,Mathlib/Data/Set/Function.lean,Mathlib/Topology/Algebra/Order/IccExtendFromIoo.lean 3 7 ['j-loreaux', 'shuxuezhuyi'] nobody
429-68426
1 year ago
559-31692
1 year ago
30-30522
30 days
7225 jjaassoonn
author:jjaassoonn
some random stuff - Consider two commutative rings `R` and `S` and `X` and `(R, S)`-bimodule. Consider the tensor functor `(X ⊗[R] .)` from the category of `R`-modules to the category of `S`-modules and the hom functor `X →ₗ[S] .` from the category of `S`-modules to the category of `R`-modules, they form an adjunction. - direct limits of modules commute with tensor product - A proof of ![00HD](https://stacks.math.columbia.edu/tag/00HD) Three definitions for flatness: 1. in terms of injectiveness ```lean def Flat.injective : Prop := ∀ ⦃N N' : ModuleCat.{u} R⦄ (L : N ⟶ N'), Function.Injective L → Function.Injective ((tensorRight (ModuleCat.of R M)).map L) ``` 2. in terms of ideals ```lean def Flat.ideal : Prop := ∀ (I : Ideal R), Function.Injective (TensorProduct.lift ((lsmul R M).comp I.subtype)) ``` 3. in terms of finitely generated ideal ```lean def Flat.fg_ideal : Prop := ∀ ⦃I : Ideal R⦄ (_ : I.FG), Function.Injective (TensorProduct.lift ((lsmul R M).comp I.subtype)) ``` and they are all equivalent: ```lean lemma tfae : List.TFAE [ Flat.injective R M, Flat.ideal R M, Flat.fg_ideal R M ] := by ``` The dependencies between these changed files are: ``` Algebra.Module.LinearMap--------------------------------- | | | | v v Algebra.Category.ModuleCat.TensorProduct -----> Algebra.Character | | | v Algebra.DirectLimitAndTensorProduct -------------> RingTheory.Flat ``` to prove equivalence of other definitions, e.g. exact functor, tor, etc should be easier with this because the proof is will be categorical --- ------------- Some other stuff not about flatness 1. If $S$ is a submonoid and $I$ is maximally disjoint from $S$ then $I$ is prime 2. if $\mathfrak p$ is a minimal prime, then $x \in \mathfrak p$ implies that $x$ is a zero divisor 3. Noetherian rings has only finitely many minimal ideals 4. One version of [the prime avoidance lemma](https://en.wikipedia.org/wiki/Prime_avoidance_lemma): if $E$ is an addsubgroup of a ring and is mutiplicatively closed, and $\mathfrak p_i$ is some prime ideals, then not being any subset of the individual prime ideal implies that not being a subset of their union ---------- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1828/16 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/TensorProduct.lean,Mathlib/Algebra/Character.lean,Mathlib/Algebra/DirectLimitAndTensorProduct.lean,Mathlib/Algebra/Module/LinearMap.lean,Mathlib/AlgebraicGeometry/PrimeSpectrum/Basic.lean,Mathlib/AlgebraicGeometry/PrimeSpectrum/Noetherian.lean,Mathlib/CategoryTheory/Functor/Fin.lean,Mathlib/CategoryTheory/ShortExactSequence.lean,Mathlib/RingTheory/Flat.lean,Mathlib/RingTheory/Ideal/Basic.lean,Mathlib/RingTheory/Ideal/MinimalPrime.lean,Mathlib/RingTheory/Ideal/PrimeAvoidance.lean 13 6 ['eric-wieser', 'jjaassoonn'] nobody
429-68426
1 year ago
623-47331
1 year ago
0-0
0 seconds
7615 eric-wieser
author:eric-wieser
chore(LinearAlgebra/Basic): generalize compatibleMaps to semilinear maps Spotted while reviewing #7611 --- - [x] depends on: #7611 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-CI easy merge-conflict
label:t-algebra$
9/33 Mathlib/LinearAlgebra/Basic.lean 1 1 ['leanprover-community-mathlib4-bot'] nobody
429-68426
1 year ago
451-49130
1 year ago
0-0
0 seconds
7835 shuxuezhuyi
author:shuxuezhuyi
feat(LinearAlgebra/Matrix): `lift` for projective special linear group We provide converters to help with the use of "quotient.liftOn" on projective special linear groups. --- - [x] depends on: #7826 - [x] depends on: #7791 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author
label:t-algebra$
52/0 Mathlib/LinearAlgebra/Matrix/ProjectiveSpecialLinearGroup.lean 1 3 ['jcommelin', 'leanprover-community-mathlib4-bot', 'shuxuezhuyi'] jcommelin
assignee:jcommelin
429-68426
1 year ago
450-21885
1 year ago
1-85757
1 day
6777 adomani
author:adomani
chore(Co*variantClass): replace eta-expanded (· * ·), (· + ·), (· ≤ ·), (· < ·) Replace `CovariantClass X X (· * ·) (· ≤ ·)` with -> `CovariantClass X X HMul.hMul LE.le` and similarly for `HAdd`, `LT`, `Contravariant`. This PR is inspired by [Issue #6646](https://github.com/leanprover-community/mathlib4/issues/6646) and, more specifically, [this comment](https://github.com/leanprover-community/mathlib4/issues/6646#issuecomment-1692792066). Note that https://github.com/leanprover/lean4/pull/2267 would make this unnecessary --- ```bash # First sed command: # the first captured pattern is `Co*variantClass ` # the second captured pattern is `` # the third captured pattern is `+` or `*` # the fourth captured pattern is `<` or `≤` # a match for `Co*variantClass ·) (· ·)` becomes # `Co*variantClass replaceop replaceop` # Second sed command: similar to the first, but looks for `(Function.swap (· ·))` sed -i ' s=\(Co[ntra]*variantClass \(..*\) \2 \)(· *\([+*]\) *·) (· *\([<≤]\) *·)=\1replaceop\3 replaceop\4=g s=\(Co[ntra]*variantClass \(..*\) \2 \)(\([Functio\.swap ]*\)(· *\([+*]\) *·)) (· *\([<≤]\) *·)=\1(\3replaceop\4) replaceop\5=g s=replaceop+=HAdd.hAdd=g s=replaceop\*=HMul.hMul=g s=replaceop<=LT.lt=g s=replaceop≤=LE.le=g s=\(Co[ntra]*variantClass N N\) (· \* ·) r=\1 HMul.hMul r=g s=\(Co[ntra]*variantClass N N (swap μ)\) (· ≤ ·)=\1 LE.le=g s=\(Co[ntra]*variantClass N N\) (swap (· \* ·)) r=\1 (swap HMul.hMul) r=g s=\(CovariantClass (Filter α) (Filter α)\) (· / ·) (· ≤ ·)=\1 HDiv.hDiv LE.le=g s=\(CovariantClass (Filter α) (Filter α)\) (swap (· / ·)) (· ≤ ·)=\1 (swap HDiv.hDiv) LE.le=g s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· ≤ ·)=\1 LE.le=g s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· < ·)=\1 LT.lt=g s=\(Co[ntra]*variantClass [^}]*\) (· ≤ ·)=\1 LE.le=g s=\(CovariantClass .* (Filter β)\) (· • ·) LE.le=\1 HSMul.hSMul LE.le=g ' $(git ls-files '*.lean') ``` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 703/678 Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/Bounds.lean,Mathlib/Algebra/CovariantAndContravariant.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/GroupPower/Order.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/Archimedean.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Group/DenselyOrdered.lean,Mathlib/Algebra/Order/Group/MinMax.lean,Mathlib/Algebra/Order/Group/OrderIso.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Interval.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/LatticeGroup.lean,Mathlib/Algebra/Order/Module.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Cancel/Defs.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/Lemmas.lean,Mathlib/Algebra/Order/Monoid/MinMax.lean,Mathlib/Algebra/Order/Monoid/NatCast.lean,Mathlib/Algebra/Order/Monoid/OrderDual.lean,Mathlib/Algebra/Order/Monoid/Prod.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithZero/Basic.lean,Mathlib/Algebra/Order/Monoid/WithZero/Defs.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Pointwise.lean,Mathlib/Algebra/Order/Positive/Ring.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Lemmas.lean,Mathlib/Algebra/Order/Sub/Basic.lean,Mathlib/Algebra/Order/Sub/Canonical.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Algebra/Order/WithZero.lean,Mathlib/Algebra/Parity.lean,Mathlib/Algebra/Star/Order.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Normed/Order/Lattice.lean,Mathlib/Data/DFinsupp/Lex.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/List/BigOperators/Basic.lean,Mathlib/Data/List/BigOperators/Lemmas.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Nat/Cast/Order.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/Real/ENNReal.lean,Mathlib/Data/Real/NNReal.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/Data/Sign.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/VectorMeasure.lean,Mathlib/Order/ConditionallyCompleteLattice/Group.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Martingale/Basic.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/PGame.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/NaturalOps.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/Positivity/Basic.lean,Mathlib/Topology/ContinuousFunction/Algebra.lean,lean-toolchain,test/Recall.lean,test/propose.lean 81 36 ['adomani', 'alreadydone', 'digama0', 'eric-wieser', 'ericrbg', 'jcommelin', 'leanprover-bot', 'sgouezel'] nobody
429-68426
1 year ago
451-49130
1 year ago
35-56459
35 days
7227 kmill
author:kmill
feat: flexible binders and integration into notation3 Introduces `flexibleBinders`, which is an extensible system for binder notations that allow destructuring, bounded domains, and other niceties. Integrates this into `notation3`, and makes `Finset.sum`/`Finset.prod` use it. --- - [ ] depends on: #6833 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict WIP 1215/131 Mathlib.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/BigOperators/NatAntidiagonal.lean,Mathlib/Mathport/Notation.lean,Mathlib/Util/FlexibleBinders.lean,Mathlib/Util/FlexibleBindersFinset.lean,Mathlib/Util/SyntaxFun.lean,test/FlexibleBinders.lean,test/notation3.lean 10 3 ['eric-wieser', 'kmill', 'leanprover-community-mathlib4-bot'] nobody
429-68426
1 year ago
632-49862
1 year ago
0-0
0 seconds
7713 RemyDegenne
author:RemyDegenne
feat: add_left/right_inj for measures `μ + ν₁ = μ + ν₂ ↔ ν₁ = ν₂`, and similarly on the right. This is not true in general for measures, but is true when `μ` is mutually singular with the two other measures or when `μ` is finite. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability merge-conflict awaiting-author 53/1 Mathlib/MeasureTheory/Measure/MutuallySingular.lean,lean-toolchain 2 6 ['RemyDegenne', 'digama0', 'eric-wieser', 'fpvandoorn'] nobody
429-68426
1 year ago
703-74266
1 year ago
0-62955
17 hours
7962 eric-wieser
author:eric-wieser
feat: `DualNumber (Quaternion R)` as a `CliffordAlgebra` This provides a clifford algebra isomorphic to the dual quaternions --- - [x] depends on: #7934 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict WIP
label:t-algebra$
307/7 Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/QuaternionBasis.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Equivs.lean 3 16 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
429-68426
1 year ago
441-47015
1 year ago
0-0
0 seconds
7601 digama0
author:digama0
feat: ring hom support in `ring` As [requested on Zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/aroots/near/395750055). Adds support for distributing ring morphisms in `ring`: ```lean example (p : ℤ[X]) (r : ℤ) : C (2 * r) * p = C r * p + C r * p := by ring ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-meta merge-conflict awaiting-author
label:t-algebra$
257/48 Mathlib/Tactic/Ring/Basic.lean,test/linear_combination.lean,test/ring.lean 3 1 ['eric-wieser'] nobody
429-68426
1 year ago
486-79418
1 year ago
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. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-CI merge-conflict awaiting-author help-wanted 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
429-68426
1 year ago
746-36286
2 years ago
0-0
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7909 mcdoll
author:mcdoll
fix(Tactic/Continuity): remove npowRec and add new tag for Continuous.pow --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology t-meta merge-conflict WIP 14/9 Mathlib/Tactic/Continuity.lean,Mathlib/Topology/Category/TopCat/Limits/Basic.lean,test/Continuity.lean 3 2 ['eric-wieser'] nobody
429-68426
1 year ago
705-8467
1 year ago
0-72515
20 hours
7875 astrainfinita
author:astrainfinita
chore: make `SMulCommClass A A B` and `SMulCommClass A B B` higher priority --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) slow-typeclass-synthesis t-algebra merge-conflict
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
429-68426
1 year ago
451-49130
1 year 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]`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-CI merge-conflict
label:t-algebra$
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
429-68426
1 year ago
451-49130
1 year ago
0-0
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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
429-68425
1 year ago
461-42020
1 year ago
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. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict WIP 148/0 Mathlib.lean,Mathlib/Lean/SubExpr.lean 2 0 [] nobody
429-68425
1 year ago
849-79741
2 years ago
0-0
0 seconds
4771 thorimur
author:thorimur
feat: Backtrack minimize Utilities for backtracking in order to attain a minimum according to some arbitrary notion of size when generating lists of parts and alternatives in alternating fashion. Motivated by minimizing the number of generated subgoals under apply-like actions on the goal. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 482/1 Mathlib/Tactic/Backtracking.lean,test/Backtracking.lean 2 0 [] nobody
429-68425
1 year ago
752-1400
2 years ago
0-0
0 seconds
5133 kmill
author:kmill
feat: IntermediateField adjoin syntax for sets of elements Adds support for both `F⟮S⟯` and `F⟮α⟯`. The term `x` in `F⟮x⟯` is elaborated, and if it has type `Set _` the first interpretation is used, and otherwise the second is. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict WIP
label:t-algebra$
110/55 Mathlib/FieldTheory/Adjoin.lean 1 0 [] nobody
429-68425
1 year ago
785-20289
2 years ago
0-0
0 seconds
3808 kim-em
author:kim-em
feat: #formalize, backed by a choice of LLMs This replaces * https://github.com/leanprover-community/mathlib4/pull/3785, which has essentially been moved to an [independent repository](https://github.com/leanprover-community/llm) and generalised to interface with a choice of OpenAI's GPT, a gpt4all model (running locally via their python binding), or a model compatible with `llama.cpp` (e.g. the 4-bit quantised versions of Meta's LLaMa models). * https://github.com/leanprover-community/mathlib4/pull/3786, which has been modified slightly but still adds code here in `Mathlib.Tactic.Formalize`. Typical output: ``` #formalize "There are infinitely many primes numbers ending with a 7." ``` produces: * GPT4 ``` -- /-- There are infinitely many prime numbers ending with a 7. -/ -- theorem infinitely_many_primes_ending_with_7 : ∀ N : Nat, ∃ p, N < p ∧ p.Prime ∧ p % 10 = 7 := -- sorry ``` * ggml-gpt4all-j-v1.3-groovy.bin: ``` -- There are infinitely many prime numbers that end with a 7. ``` * 7B/ggml-model-q4_0.bin: ``` -- ∀ p : nat, 7 < 7p + 1 := sorry -– \end{code} ``` There are other sample outputs in `test/formalize.lean` If you don't currently have a LLM that the `leanprover-community/llm` project can recognise, when you run `#formalize` you get an error message, which currently reads: ``` Could not find a usable chat bot! You can try one of the following: * Obtain an OpenAI API access key at https://platform.openai.com/account/api-keys, and store it in the environment variable OPENAI_API_KEY. This will enable you to use ChatGPT. * Download the GPT4All-J model `https://gpt4all.io/models/ggml-gpt4all-j-v1.3-groovy.bin`, and put it in either `$HOME/.models/` or `$LLM_MODELS`. Also install the gpt4all python bindings via `pip3 install pygpt4all`. * Clone the `llama.cpp` repository from https://github.com/ggerganov/llama.cpp. Set the environment variable `LLAMA_CPP_HOME` to this repository. Follow the instructions in the README to produce `7B/ggml-model-q4_0.bin` starting from the Meta LLaMa weights. You can store this file at one of * `$LLAMA_CPP_HOME/models/7B/ggml-model-q4_0.bin` * `$HOME/.models/7B/ggml-model-q4_0.bin` * `$LLM_MODELS/7B/ggml-model-q4_0.bin` ``` Currently there are not user-configurable hooks to pick which LLM to use: it checks the conditions described in those bullet points, and takes the first one it finds. (i.e. if you want to use the LLaMa `7B/ggml-model-q4_0.bin`, you have to remove your OpenAI API key!). However a tactic in a downstream project (e.g. mathlib) can specify which interface and model it wants to use, or just call `findChatBot` for the behaviour described in that message. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict awaiting-author 180/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Formalize.lean,lake-manifest.json,lakefile.lean,test/formalize.lean 6 2 ['digama0', 'jcommelin'] nobody
429-68425
1 year ago
749-71553
2 years ago
124-45187
124 days
6328 FR-vdash-bot
author:FR-vdash-bot
chore: make some instance about `Sub...Class` lower priority Many similar instances have been marked as lower priority. I'd like to see if this would make things faster. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-CI merge-conflict WIP
label:t-algebra$
14/14 Mathlib/RingTheory/NonUnitalSubsemiring/Basic.lean,Mathlib/RingTheory/Subsemiring/Basic.lean,lean-toolchain 3 1 ['digama0'] nobody
429-68425
1 year ago
703-75033
1 year ago
0-0
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6268 eric-wieser
author:eric-wieser
Fixups to #3838 This is an attempt to make #3838 universe polymorphic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) * Depends on #6271 * Depends on #8876 merge-conflict WIP 186/107 Mathlib/Control/Random.lean,Mathlib/Tactic/SlimCheck.lean,Mathlib/Testing/SlimCheck/Functions.lean,Mathlib/Testing/SlimCheck/Gen.lean,Mathlib/Testing/SlimCheck/Sampleable.lean,Mathlib/Testing/SlimCheck/Testable.lean,test/slim_check.lean 7 10 ['github-actions', 'kim-em'] nobody
429-68425
1 year ago
656-13892
1 year ago
0-0
0 seconds
6210 MohanadAhmed
author:MohanadAhmed
feat(Data/IsROrC/Basic): add a `StarOrderedRing` instance This PR implements a suggestion by @urkud on [Zulip thread](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/PartialOrder.20and.20StarOrderedRing.20on.20IsROrC) on how to get a `StarOrderedRing` on the `IsROrC` class. In that discussion the suggested step were: 1. Add PartialOrder K to the list of extends and add le_iff_re_im : z ≤ w ↔ re z ≤ re w ∧ im z = im w to the list of axioms. 2. Prove StarOrderedRing instance for any IsROrC. 3. Add (almost trivial) le_iff_re_im proofs to IsROrC instances for real and complex numbers. This PR does exactly these three steps --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-analysis merge-conflict WIP
label:t-algebra$
25/24 Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/IsROrC/Basic.lean 4 19 ['MohanadAhmed', 'eric-wieser', 'j-loreaux'] nobody
429-68425
1 year ago
780-71562
2 years ago
0-4269
1 hour
6633 adomani
author:adomani
feat(..Polynomial..): `MvPolynomial`s have no zero divisors This PR continues #6627, placing the `NoZeroDivisors` instance on `MvPolynomial`s and removing auxiliary intermediate results that are no longer needed. Affected files: ``` Data/MvPolynomial/Basic.lean Data/Polynomial/RingDivision.lean RingTheory/Polynomial/Basic.lean ``` --- - [ ] depends on: #6227 for the `NoZeroDivisors` instance on `AddMonoidAlgebra`s [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author
label:t-algebra$
143/57 Mathlib/Algebra/MonoidAlgebra/NoZeroDivisors.lean,Mathlib/Data/MvPolynomial/Basic.lean,Mathlib/Data/Polynomial/RingDivision.lean,Mathlib/RingTheory/Polynomial/Basic.lean 4 4 ['adomani', 'eric-wieser', 'leanprover-community-mathlib4-bot'] nobody
429-68425
1 year ago
776-29950
2 years ago
0-19160
5 hours
6330 FR-vdash-bot
author:FR-vdash-bot
chore: make some instance about `Sub...Class` higher priority than `Sub...` The opposite direction to #6328. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) slow-typeclass-synthesis t-algebra merge-conflict WIP
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 ['FR-vdash-bot', 'digama0', 'leanprover-bot'] nobody
429-68425
1 year ago
488-25515
1 year ago
0-0
0 seconds
4960 eric-wieser
author:eric-wieser
chore: use `open scoped` Earlier versions of mathport did not know about this. This was done by searching for all `open` commands referencing: * `Classical` * `BigOperators` * `Topology` * `Pointwise` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-CI merge-conflict 1026/981 Mathlib/Algebra/AddTorsor.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/Algebra/Subalgebra/Tower.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/BigOperators/NatAntidiagonal.lean,Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/BigOperators/Order.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/BigOperators/Ring.lean,Mathlib/Algebra/BigOperators/RingEquiv.lean,Mathlib/Algebra/Bounds.lean,Mathlib/Algebra/Category/GroupCat/Biproducts.lean,Mathlib/Algebra/Category/GroupCat/FilteredColimits.lean,Mathlib/Algebra/Category/GroupCat/Injective.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Biproducts.lean,Mathlib/Algebra/Category/Mon/FilteredColimits.lean,Mathlib/Algebra/Category/Ring/Adjunctions.lean,Mathlib/Algebra/Category/Ring/FilteredColimits.lean,Mathlib/Algebra/CharP/Basic.lean,Mathlib/Algebra/CharP/Two.lean,Mathlib/Algebra/DirectLimit.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Decomposition.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/DirectSum/Ring.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/GCDMonoid/Div.lean,Mathlib/Algebra/GeomSum.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Commute.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Homology/Additive.lean,Mathlib/Algebra/Homology/ComplexShape.lean,Mathlib/Algebra/Homology/Homology.lean,Mathlib/Algebra/Homology/Homotopy.lean,Mathlib/Algebra/Homology/HomotopyCategory.lean,Mathlib/Algebra/Homology/ImageToKernel.lean,Mathlib/Algebra/IndicatorFunction.lean,Mathlib/Algebra/LinearRecurrence.lean,Mathlib/Algebra/Module/BigOperators.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/Algebra/Module/LinearMap.lean,Mathlib/Algebra/Module/PointwisePi.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/Module/Submodule/Bilinear.lean,Mathlib/Algebra/Module/Submodule/Lattice.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/Chebyshev.lean,Mathlib/Algebra/Order/Module.lean,Mathlib/Algebra/Order/Pointwise.lean,Mathlib/Algebra/Order/Rearrangement.lean,Mathlib/Algebra/Order/SMul.lean,Mathlib/Algebra/Order/UpperLower.lean,Mathlib/Algebra/Periodic.lean,Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Algebra/Polynomial/GroupRingAction.lean,Mathlib/Algebra/Star/BigOperators.lean,Mathlib/Algebra/Star/Pointwise.lean,Mathlib/Algebra/Star/Subalgebra.lean,Mathlib/Algebra/Support.lean,Mathlib/Algebra/TrivSqZeroExt.lean,Mathlib/Algebra/Tropical/BigOperators.lean,Mathlib/AlgebraicGeometry/PrimeSpectrum/Basic.lean,Mathlib/AlgebraicGeometry/PrimeSpectrum/Maximal.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/AlgebraicTopology/AlternatingFaceMapComplex.lean,Mathlib/AlgebraicTopology/ExtraDegeneracy.lean,Mathlib/AlgebraicTopology/TopologicalSimplex.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Asymptotics/AsymptoticEquivalent.lean,Mathlib/Analysis/Asymptotics/Asymptotics.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/Asymptotics/SuperpolynomialDecay.lean,Mathlib/Analysis/Asymptotics/Theta.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Analysis/BoxIntegral/Box/SubboxInduction.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Filter.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/BoxIntegral/Partition/SubboxInduction.lean,Mathlib/Analysis/BoxIntegral/Partition/Tagged.lean,Mathlib/Analysis/Calculus/ContDiffDef.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean 788 0 [] nobody
429-68425
1 year ago
451-49130
1 year ago
0-0
0 seconds
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. t-measure-probability t-differential-geometry merge-conflict WIP 165/0 Mathlib.lean,Mathlib/Geometry/Manifold/MeasureZero.lean,docs/references.bib 3 27 ['ADedecker', 'github-actions', 'grunweg', 'mo271', 'sgouezel'] ADedecker
assignee:ADedecker
429-68425
1 year ago
468-64236
1 year ago
43-56043
43 days
6993 jjaassoonn
author:jjaassoonn
feat : lemmas about `AddMonoidAlgebra.{divOf, modOf}` --- - [x] depends on: #7582 - [x] depends on: #8975 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
147/3 Mathlib/Algebra/MonoidAlgebra/Division.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/MvPolynomial/Basic.lean,Mathlib/Data/MvPolynomial/CommRing.lean,Mathlib/Data/MvPolynomial/Division.lean 5 42 ['YaelDillies', 'alreadydone', 'digama0', 'eric-wieser', 'github-actions', 'jjaassoonn', 'leanprover-community-mathlib4-bot'] nobody
429-68425
1 year ago
451-49130
1 year ago
102-21189
102 days
4109 kim-em
author:kim-em
feat: run library_search when the cursor is at a sorry --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 77/0 Mathlib.lean,Mathlib/Data/Nondet/Basic.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/LibrarySearch.lean,Mathlib/Util/CodeAction/RunTactic.lean 5 0 [] nobody
429-68425
1 year ago
638-2217
1 year ago
0-0
0 seconds
5934 eric-wieser
author:eric-wieser
feat: port Data.Rat.MetaDefs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This needs some eyes from people familiar with Qq t-meta merge-conflict mathlib-port help-wanted 183/0 Mathlib.lean,Mathlib/Data/Rat/MetaDefs.lean,test/rat.lean 3 4 ['eric-wieser', 'gebner'] nobody
429-68425
1 year ago
599-55414
1 year ago
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 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-CI merge-conflict
label:t-algebra$
216/12 Mathlib.lean,Mathlib/Algebra/Order/Ring/CharZero.lean,Mathlib/Algebra/Star/Order.lean,Mathlib/Algebra/Star/Positive.lean,Mathlib/Algebra/Star/SelfAdjoint.lean,Mathlib/GroupTheory/Submonoid/Operations.lean 6 28 ['eric-wieser', 'j-loreaux', 'leanprover-community-mathlib4-bot'] nobody
429-68425
1 year ago
451-49130
1 year ago
5-55287
5 days
6195 eric-wieser
author:eric-wieser
chore(RingTheory/TensorProduct): golf the `mul` definition --- - [x] depends on: #6211 - [x] depends on: #6187 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) Strangely this causes a timeout downstream t-algebra awaiting-CI merge-conflict
label:t-algebra$
4/29 Mathlib/RingTheory/TensorProduct.lean 1 1 ['leanprover-community-mathlib4-bot'] nobody
429-68425
1 year ago
451-49130
1 year ago
0-0
0 seconds
6002 slerpyyy
author:slerpyyy
feat(Analysis.SpecialFunctions.Gaussian): add `integrable_fun_mul_exp_neg_mul_sq` If `f : ℝ → ℝ` is bounded by a polynomial, `fun x : ℝ => f x * exp (-b * x ^ 2)` is integrable. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict awaiting-author 26/0 Mathlib/Analysis/SpecialFunctions/Gaussian.lean 1 3 ['ocfnash', 'slerpyyy', 'urkud'] nobody
429-68425
1 year ago
694-58022
1 year ago
9-67365
9 days
4127 kmill
author:kmill
refactor: create HasAdj class, define Digraph, and generalize some SimpleGraph API --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics merge-conflict awaiting-author 1403/551 Mathlib.lean,Mathlib/Combinatorics/Digraph/Basic.lean,Mathlib/Combinatorics/Graph/Classes.lean,Mathlib/Combinatorics/Graph/Dart.lean,Mathlib/Combinatorics/Graph/Hom.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/Coloring.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity.lean,Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/Density.lean,Mathlib/Combinatorics/SimpleGraph/Ends/Defs.lean,Mathlib/Combinatorics/SimpleGraph/Finsubgraph.lean,Mathlib/Combinatorics/SimpleGraph/Hasse.lean,Mathlib/Combinatorics/SimpleGraph/Prod.lean,Mathlib/Combinatorics/SimpleGraph/StronglyRegular.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 18 0 [] nobody
429-68425
1 year ago
470-65853
1 year ago
0-0
0 seconds
5912 ADedecker
author:ADedecker
feat(Analysis.Distribution.ContDiffMapSupportedIn): space of smooth maps with support in a fixed compact --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict WIP 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
429-68425
1 year ago
780-36066
2 years ago
0-0
0 seconds
6491 eric-wieser
author:eric-wieser
chore(Mathlib/Algebra/Hom/GroupAction): add `SMulHomClass.comp_smul` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
24/10 Mathlib/Algebra/Hom/GroupAction.lean 1 0 [] nobody
429-68425
1 year ago
451-49130
1 year ago
83-76369
83 days
6307 yuma-mizuno
author:yuma-mizuno
refactor(CategoryTheory/Monoidal): add whiskering operators We introduce whiskering operators. This allows us to introduce a simp-normal form for morphisms in monoidal categories. Rewriting into simp-normal forms is especially useful when combined with the coherence tactic. --- - [x] depends on: #6420 - [x] depends on: #8191 - [x] depends on: #9988 - [x] depends on: #9991 - [x] depends on: #9995 - [x] depends on: #10061 - [x] depends on: #10078 - [x] depends on: #10898 - [x] depends on: #10912 - [x] depends on: #11223 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict awaiting-author 325/280 Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/CategoryTheory/Bicategory/End.lean,Mathlib/CategoryTheory/Closed/Ideal.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Free/Coherence.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/Limits.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/NaturalTransformation.lean,Mathlib/CategoryTheory/Monoidal/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,test/CategoryTheory/Coherence.lean 15 38 ['eric-wieser', 'github-actions', 'grunweg', 'jcommelin', 'kim-em', 'leanprover-community-mathlib4-bot', 'yuma-mizuno'] nobody
429-68425
1 year ago
444-81254
1 year ago
0-0
0 seconds
6403 astrainfinita
author:astrainfinita
chore: change instance priorities of `Ordered*` hierarchy --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) slow-typeclass-synthesis t-order t-algebra merge-conflict awaiting-author
label:t-algebra$
253/79 Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Field/Canonical/Defs.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/WithZero/Defs.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Star.lean,Mathlib/Algebra/Order/WithZero.lean,Mathlib/Analysis/InnerProductSpace/Orientation.lean,Mathlib/LinearAlgebra/Orientation.lean,Mathlib/RingTheory/HahnSeries.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/Tactic/Positivity/Core.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean 18 39 ['Vierkantor', 'astrainfinita', 'digama0', 'eric-wieser', 'j-loreaux', 'leanprover-bot'] nobody
429-68425
1 year ago
488-25495
1 year ago
13-18399
13 days
6079 eric-wieser
author:eric-wieser
fix: deduplicate variables `variables {A} [Ring A]` meant "update the binder of `A`" in Lean 3, but now means "create a duplicate variable called `A`" (or at least, does so when inspecting the state within the variables line). This removes a number of porting notes that were stumbling over this behavior. [Related Zulip thread](https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/unexpected.20.60variable.60.20behaviour.3F/near/360154080) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-CI merge-conflict 1012/443 Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/CharP/Basic.lean,Mathlib/Algebra/CovariantAndContravariant.lean,Mathlib/Algebra/DirectLimit.lean,Mathlib/Algebra/DirectSum/Finsupp.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Group/Pi.lean,Mathlib/Algebra/GroupPower/Basic.lean,Mathlib/Algebra/GroupPower/Lemmas.lean,Mathlib/Algebra/Hom/Aut.lean,Mathlib/Algebra/Hom/Equiv/Basic.lean,Mathlib/Algebra/Hom/Group.lean,Mathlib/Algebra/Homology/HomologicalComplex.lean,Mathlib/Algebra/Homology/HomotopyCategory.lean,Mathlib/Algebra/Homology/ImageToKernel.lean,Mathlib/Algebra/Homology/ShortComplex/LeftHomology.lean,Mathlib/Algebra/IndicatorFunction.lean,Mathlib/Algebra/Jordan/Basic.lean,Mathlib/Algebra/Lie/Classical.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Lie/TensorProduct.lean,Mathlib/Algebra/Module/Injective.lean,Mathlib/Algebra/Module/LinearMap.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Grading.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Pi.lean,Mathlib/Algebra/Order/Ring/Lemmas.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/SMulWithZero.lean,Mathlib/Algebra/Star/Module.lean,Mathlib/Algebra/Support.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Point.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/DoldKan/Decomposition.lean,Mathlib/AlgebraicTopology/MooreComplex.lean,Mathlib/Analysis/Calculus/ContDiff.lean,Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean,Mathlib/Analysis/Calculus/LocalExtr.lean,Mathlib/Analysis/Calculus/TangentCone.lean,Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/Convex/Combination.lean,Mathlib/Analysis/Convex/Extreme.lean,Mathlib/Analysis/Convex/Function.lean,Mathlib/Analysis/Convex/Hull.lean,Mathlib/Analysis/Convex/Independent.lean,Mathlib/Analysis/Convex/Intrinsic.lean,Mathlib/Analysis/Convex/Join.lean,Mathlib/Analysis/Convex/Quasiconvex.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Convex/Star.lean,Mathlib/Analysis/Convex/Uniform.lean,Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/InnerProductSpace/Calculus.lean,Mathlib/Analysis/LocallyConvex/AbsConvex.lean,Mathlib/Analysis/LocallyConvex/BalancedCoreHull.lean,Mathlib/Analysis/LocallyConvex/Basic.lean,Mathlib/Analysis/LocallyConvex/Bounded.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/AddCircle.lean,Mathlib/Analysis/Normed/Group/Hom.lean,Mathlib/Analysis/Normed/Group/Seminorm.lean,Mathlib/Analysis/NormedSpace/Completion.lean,Mathlib/Analysis/NormedSpace/LinearIsometry.lean,Mathlib/Analysis/NormedSpace/Multilinear.lean,Mathlib/Analysis/NormedSpace/OperatorNorm.lean,Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/CategoryTheory/Action.lean,Mathlib/CategoryTheory/Bicategory/LocallyDiscrete.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation.lean,Mathlib/CategoryTheory/Closed/Ideal.lean,Mathlib/CategoryTheory/ConcreteCategory/UnbundledHom.lean,Mathlib/CategoryTheory/Core.lean,Mathlib/CategoryTheory/Endofunctor/Algebra.lean,Mathlib/CategoryTheory/Enriched/Basic.lean,Mathlib/CategoryTheory/EssentialImage.lean,Mathlib/CategoryTheory/FullSubcategory.lean,Mathlib/CategoryTheory/Functor/Category.lean,Mathlib/CategoryTheory/Limits/Fubini.lean,Mathlib/CategoryTheory/Limits/HasLimits.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Kernels.lean,Mathlib/CategoryTheory/Limits/Shapes/BinaryProducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Biproducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Equalizers.lean,Mathlib/CategoryTheory/Limits/Shapes/Images.lean,Mathlib/CategoryTheory/Limits/Shapes/WidePullbacks.lean,Mathlib/CategoryTheory/Linear/LinearFunctor.lean,Mathlib/CategoryTheory/Localization/Construction.lean,Mathlib/CategoryTheory/Monoidal/Braided.lean,Mathlib/CategoryTheory/Monoidal/CommMon_.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean 302 1 ['timotree3'] nobody
429-68425
1 year ago
451-49130
1 year ago
0-0
0 seconds
3757 thorimur
author:thorimur
feat: config options for `fail_if_no_progress` This PR creates config options for `fail_if_no_progress` that allow the user to tweak what exactly counts as "progress". This includes whether to use defeq or `BEq`, what transparency to use, and which parts of the goal and local context to check. It also splits off the comparison functionality into `Mathlib.Lean.Meta.Compare`, which provides fully configurable comparison functions for common complex metaprogramming types not specific to `fail_if_no_progress`. These types are `Expr`, `LocalDecl`, `LocalContext`, `MetavarDecl`, `MVarId`, and `List MVarId`. --- See [zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/progress.20on.20fail_if_no_progress) for a couple review questions. Status update: this PR is now basically done, save for some extra tests which should probably be included. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict WIP 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
429-68424
1 year ago
681-79610
1 year ago
45-49113
45 days
12353 thorimur
author:thorimur
feat: `conv%` This PR introduces `conv% e => tac`, along with `simp%`, `norm_num%`, and `push_neg%`, which are defined in terms of `conv%`. It also introduces `conv%?` (and `simp%?`, `norm_num%?`, and `push_neg%?`) as shortcuts for `show_term ...`. This is a relatively straightforward refactor of code already present in the implementation of `#conv`, and otherwise relies entirely on simple macros. This PR also introduces some modifications to existing command syntax for `#conv`, `#simp`, and `#norm_num`: * The syntax for `#conv` was `#conv tac => e`; however, this is inconsistent with the tactic syntax, and so this has been flipped to `#conv e => tac`. Likewise, `conv%` uses the same (new) syntax `conv% e => tac`. * `#simp` and `#norm_num` separated their config and `only` syntax from the expression by an optional `=>` (for `#simp`) and an optional `:` (for `#norm_num`) (e.g. `#simp only [lem] => e`). These have both been replaced with an optional`on` (e.g. `#simp only [lem] on e`) which is also used for `simp%` and `norm_num%`. Although `#whnf` is implemented in terms of `#conv`, this PR doesn't introduce `whnf%` in the same way, as that's probably better off being implemented directly instead of through `conv`. --- WIP: needs tests. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict WIP 131/32 Mathlib/Tactic/Conv.lean,Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/PushNeg.lean,docs/Conv/Guide.lean 4 0 [] nobody
425-44734
1 year ago
425-44734
1 year ago
0-0
0 seconds
7903 urkud
author:urkud
feat: define `UnboundedSpace` --- The new instances generate some timeouts, and I don't understand why. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict help-wanted 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
422-56403
1 year ago
422-56403
1 year ago
0-0
0 seconds
14994 kim-em
author:kim-em
profiling: skipKernelTC merge-conflict 2/1 lakefile.lean 1 3 ['github-actions', 'kim-em', 'leanprover-bot'] nobody
421-2147
1 year ago
421-2147
1 year ago
0-0
0 seconds
15400 grunweg
author:grunweg
feat: "confusing variables" linter This linter flags `variable` commands which both update an existing binder annotation and declare new variables: these can yield confusing or misleading error messages (see leanprover/lean4#2789). Instead, these should be split in several `variable` statements. ---------- Help fixing these errors is welcome! Currently, the linter only catches *some* cases, when the updated binder is from a previous scope. To make it catch all cases, the linter could insert a `section` before the `variable` command and use that scope instead. See [zulip](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Get.20scope.20*before*.20some.20syntax.20is.20evaluated) [discussions](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Determining.20variable.20binders.20from.20syntax). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict WIP 292/47 Cache/Requests.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Prod.lean,Mathlib/Dynamics/Ergodic/Ergodic.lean,Mathlib/FieldTheory/AbelRuffini.lean,Mathlib/FieldTheory/Adjoin.lean,Mathlib/FieldTheory/IntermediateField.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/FieldTheory/Minpoly/MinpolyDiv.lean,Mathlib/FieldTheory/Normal.lean,Mathlib/FieldTheory/PurelyInseparable.lean,Mathlib/Geometry/Manifold/BumpFunction.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Geometry/Manifold/ContMDiff/Basic.lean,Mathlib/Geometry/Manifold/PartitionOfUnity.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/Tangent.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Basic.lean,Mathlib/Tactic/Linter/Lint.lean,Mathlib/Tactic/ToAdditive/Frontend.lean,Mathlib/Topology/FiberBundle/Basic.lean,Mathlib/Topology/FiberBundle/Trivialization.lean,test/Lint.lean 22 1 ['github-actions'] nobody
417-49497
1 year ago
423-119
1 year ago
0-0
0 seconds
14654 grunweg
author:grunweg
feat(runLinter): allow only running certain linters This adds a script `run_linter`, which is a fork of batteries' `runLinter` with extra features: - rewrite as a CLI app, so --help messages etc. come for free - add a `--list` option, which prints the list of linters it was about to run, and exists - add `--select`, `--ignore` and `--only` options which ensure certain linters are always run, never resp. that only a certain list of linters are run. (`add` takes priority over `exclude` or `only`.) - add an `update_only_remove` flag which only runs linters mentioned in the `nolints` file: this only removes entries (by design), but is often much faster. - renamed to `run_linter`: actually, per the [zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Naming.20convention/near/450896930), this should be `run-linter` --- and one could as well use the opportunity to rename this to e.g. `env-linter`. Asked [here](https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/Configuring.2Fmodernizing.20runLinter). Intended use cases 1. Run `update_only_remove` when updating the nolints file. In fact, it is so fast that it could even run during regular CI, after the normal `lint` step... 2. Run the mathlib linters locally. The simpNF linters are slow enough (for a reason, but still) that doing so is currently annoying. On my notebook, they can easily take half an hour, during which my notebook is otherwise hardly usable. 3. You're developing a new linter and only want to run *that* one (as there was no change about the other ones). Probably, the nicest result would be this PR landing in batteries (perhaps in pieces) instead of here. --- Two CLI warts I'm unhappy about. - how can I have flag names with a hyphen? Currently, I have to write `--print_linters`, which is less pretty. - many options take an `Array String`: how can I pass this to the executable? This is not obvious to me... [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter RFC merge-conflict 320/146 Mathlib/Analysis/LocallyConvex/Bounded.lean,Mathlib/Analysis/Oscillation.lean,Mathlib/Geometry/Manifold/LocalInvariantProperties.lean,Mathlib/MeasureTheory/Measure/EverywherePos.lean,Mathlib/SetTheory/Ordinal/Topology.lean,Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Algebra/Module/Basic.lean,Mathlib/Topology/Algebra/Monoid.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/Basic.lean,Mathlib/Topology/Category/TopCat/Basic.lean,Mathlib/Topology/Clopen.lean,Mathlib/Topology/CompactOpen.lean,Mathlib/Topology/Compactness/LocallyCompact.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/DenseEmbedding.lean,Mathlib/Topology/Gluing.lean,Mathlib/Topology/Homeomorph.lean,Mathlib/Topology/IndicatorConstPointwise.lean,Mathlib/Topology/Inseparable.lean,Mathlib/Topology/Irreducible.lean,Mathlib/Topology/IsLocalHomeomorph.lean,Mathlib/Topology/LocalAtTarget.lean,Mathlib/Topology/Maps/Basic.lean,Mathlib/Topology/MetricSpace/Isometry.lean,Mathlib/Topology/NoetherianSpace.lean,Mathlib/Topology/Order.lean,Mathlib/Topology/Order/LowerUpperTopology.lean,Mathlib/Topology/Partial.lean,Mathlib/Topology/PartialHomeomorph.lean,Mathlib/Topology/PartitionOfUnity.lean,Mathlib/Topology/QuasiSeparated.lean,Mathlib/Topology/Separation.lean,Mathlib/Topology/TietzeExtension.lean,Mathlib/Topology/UniformSpace/Ascoli.lean,Mathlib/Topology/UniformSpace/Basic.lean,Mathlib/Topology/UniformSpace/Cauchy.lean,Mathlib/Topology/UniformSpace/CompactConvergence.lean,Mathlib/Topology/UniformSpace/Completion.lean,Mathlib/Topology/UniformSpace/Equicontinuity.lean,Mathlib/Topology/UniformSpace/Matrix.lean,Mathlib/Topology/UniformSpace/Pi.lean,Mathlib/Topology/UnitInterval.lean,Mathlib/Topology/UrysohnsBounded.lean,Mathlib/Topology/UrysohnsLemma.lean,Mathlib/Topology/VectorBundle/Basic.lean,lakefile.lean,scripts/run_linter.lean 49 5 ['github-actions', 'grunweg', 'rosborn'] nobody
417-26347
1 year ago
417-26347
1 year ago
13-61906
13 days
15679 adomani
author:adomani
test: refactor in CI --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 213/5 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,Mathlib.lean,Mathlib/Algebra/Homology/HomotopyCategory/SingleFunctors.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unique.lean,Mathlib/Analysis/Convex/Combination.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/CategoryTheory/Bicategory/Adjunction.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/GroupTheory/Coxeter/Matrix.lean,Mathlib/Order/Filter/Cocardinal.lean,Mathlib/Order/UpperLower/Basic.lean,Mathlib/TestRefactor.lean,Refactor/Main.lean,lakefile.lean,lean-toolchain 21 1 ['github-actions'] nobody
417-25579
1 year ago
417-25579
1 year ago
0-8
8 seconds
10629 madvorak
author:madvorak
feat: List.cons_sublist_append_iff_right --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 11/0 Mathlib/Data/List/Basic.lean 1 1 ['eric-wieser'] nobody
415-61970
1 year ago
415-61970
1 year ago
53-73442
53 days
9973 Ruben-VandeVelde
author:Ruben-VandeVelde
feat: polynomials formed by lists From https://github.com/leanprover-community/mathlib/pull/15476 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict please-adopt 311/0 Mathlib.lean,Mathlib/Data/Polynomial/OfList.lean 2 0 [] nobody
415-61503
1 year ago
415-61503
1 year ago
0-0
0 seconds
12926 joelriou
author:joelriou
feat(CategoryTheory): the monoidal category structure induced by a monoidal functor In this PR, given a monoidal functor `F : MonoidalFunctor C D`, we define a monoidal category structure on the category `InducedCategory D F.obj`, which has the "same" objects as `C`, but the morphisms between `X` and `Y` identify to `F.obj X ⟶ F.obj Y`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict WIP 105/0 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Induced.lean 2 3 ['eric-wieser', 'github-actions', 'joelriou'] nobody
415-59902
1 year ago
415-59902
1 year ago
0-0
0 seconds
12869 adomani
author:adomani
feat: linter and script for `theorem` vs `lemma` This PR contains a linter for flagging doc-string-less `theorem`s, as well as a bash script that, once the linter ran on Mathlib, automatically replaces every linter-offending `theorem` by `lemma`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict 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
415-46666
1 year ago
415-46666
1 year ago
0-0
0 seconds
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) t-algebra merge-conflict WIP
label:t-algebra$
10/3 Mathlib/Algebra/DirectSum/Module.lean,Mathlib/LinearAlgebra/FreeModule/Basic.lean 2 1 ['github-actions'] nobody
414-58687
1 year ago
414-58687
1 year ago
0-0
0 seconds
13010 ADedecker
author:ADedecker
feat: relax universe constraint in stoneCechExtend --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 33/3 Mathlib/Topology/StoneCech.lean 1 2 ['ADedecker', 'erdOne'] nobody
414-58484
1 year ago
414-58484
1 year ago
0-0
0 seconds
12411 adomani
author:adomani
feat: more linting of cdots --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict 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
414-58347
1 year ago
414-58347
1 year ago
0-0
0 seconds
12279 casavaca
author:casavaca
WIP: feat: Holder's inequality n-ary --- - [x] depends on #12291 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict WIP 129/0 Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean 2 13 ['github-actions'] nobody
414-58332
1 year ago
414-58332
1 year ago
0-0
0 seconds
12093 ADedecker
author:ADedecker
feat: tweak the definition of semicontinuity to behave better in nonlinear orders Summary of the changes: - change definitions to make [lowerSemicontinuous_iff_isClosed_preimage](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Semicontinuous.html#lowerSemicontinuous_iff_isClosed_preimage) true without assuming `LinearOrder`, so that semicontinuity corresponds to continuity for lower/upper order topology on the codomain. See discussion on [Zulip](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Semicontinuity.20definition.20for.20non-linear.20orders/near/432898278) - add new `iff` lemmas for unfolding the definition - add `iff` lemmas with the old definition in the linearly ordered case - some basic lemmas need to be changed in an easy way - minimize assumptions for continuity => semicontinuity - prove the semicontinuity criterion for indicators using "preimage of Ici/Iic" instead of a direct proof, because the proof is more natural (especially because we have no `filter_upwards` for `Frequently`) - in the rest of the file (which is about linear orders anyway), we don't touch the statements and just rewrite to the old definition. Some of these could be generalized, but we keep that for a later PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict WIP 274/130 Mathlib/Analysis/BoundedVariation.lean,Mathlib/MeasureTheory/Integral/FundThmCalculus.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Topology/Semicontinuous.lean 4 0 [] nobody
414-58294
1 year ago
414-58294
1 year ago
0-0
0 seconds
11519 thorimur
author:thorimur
feat: `syntax_rules` --- Experimental. WIP. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 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
414-58270
1 year ago
414-58270
1 year ago
0-0
0 seconds
11393 mcdoll
author:mcdoll
feat(Analysis/Distribution/SchwartzSpace): The Heine-Borel property --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict WIP 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
414-58260
1 year ago
414-58260
1 year ago
0-0
0 seconds
9444 erdOne
author:erdOne
feat: Various instances regarding `𝓞 K`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory merge-conflict help-wanted 27/0 Mathlib/NumberTheory/NumberField/Basic.lean,Mathlib/RingTheory/IntegralClosure.lean 2 9 ['erdOne', 'leanprover-bot', 'mattrobball', 'riccardobrasca', 'xroblot'] nobody
414-58179
1 year ago
414-58179
1 year ago
0-0
0 seconds
8931 hmonroe
author:hmonroe
feat(Computable): define P, NP, and NP-complete Revised to focus on languages that are binary strings, given the issue of non-acceptable encodings of unspecified Types --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability merge-conflict 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
414-58144
1 year ago
414-58144
1 year ago
5-62479
5 days
10641 newell
author:newell
feat(Topology/MetricSpace/WellSpaced): Define sets that are *well-spaced*. Create a new file `Mathlib.Topology.MetricSpace.WellSpaced` that contains definitions of sets which are in some sense *well-spaced*. Some examples are Delone and Meyer sets, which find applications in Quasicrystals and Coding Theory, among others. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 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
414-58112
1 year ago
414-58112
1 year ago
0-0
0 seconds
10428 dwrensha
author:dwrensha
feat: add simp_digits tactic With the introduction of the simprocs `reduceLE`, `reduceMod`, `reduceDiv` etc. in Lean v4.6.0, now `simp` can fully normalize typical `Nat.digits` calls that have concrete arguments. The situation is still a bit delicate however, as we want to avoid invoking kernel reduction on `Nat.digits`, because the `Acc`-based ("well founded") recursion in `digitsAux` can get bogged down. This PR introduces a new tactic `simp_digits` tactic that contains only the simp lemmas and simprocs needed to reduce `Nat.digits`. This allows proofs involving `Nat.digits` to be cleanly factored into two steps: 1. reduce `Nat.digits` via `simp_digits`, 2. do things that require kernel reduction such as `simp_arith`, `decide`, or `rfl`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 6/124 Archive/Imo/Imo1960Q1.lean,Archive/Imo/Imo1962Q1.lean,Mathlib/Data/Nat/Digits.lean 3 2 ['dwrensha'] nobody
414-57966
1 year ago
414-57966
1 year ago
0-0
0 seconds
8608 eric-wieser
author:eric-wieser
feat: multiplicativize `AddTorsor` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict WIP
label:t-algebra$
268/199 Mathlib/Algebra/AddTorsor.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Data/Set/Pointwise/SMul.lean,Mathlib/Tactic/ToAdditive.lean 4 0 [] nobody
414-57789
1 year ago
414-57789
1 year ago
0-0
0 seconds
6603 tydeu
author:tydeu
feat: automatically try `cache get` before build --- A quick proof-of-concept. With this, `lake build` will always try `cache get` before building mathlib. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI merge-conflict WIP 29/0 lakefile.lean 1 3 ['kim-em', 'tydeu'] nobody
414-57731
1 year ago
414-57731
1 year ago
11-1960
11 days
6058 apurvnakade
author:apurvnakade
feat: duality theory for cone programs This PR tracks the development of duality theory for cone programs. [Reference](https://ti.inf.ethz.ch/ew/courses/ApproxSDP09/notes/conelp.pdf) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #6059 - [ ] define direct sum of cones - [ ] weak duality - [ ] regular duality - [ ] slater condition - [ ] strong duality t-analysis merge-conflict WIP 159/0 Mathlib.lean,Mathlib/Analysis/Convex/Cone/ConeLinearProgram.lean 2 1 ['leanprover-community-mathlib4-bot'] nobody
414-57676
1 year ago
414-57676
1 year ago
0-0
0 seconds
6449 ADedecker
author:ADedecker
feat: functions with finite fibers --- This has been discussed before on [Zulip](https://leanprover.zulipchat.com/#narrow/stream/217875-Is-there-code-for-X.3F/topic/.E2.9C.94.20Cofinite.20maps.3F) and it came up again while working with @kkytola's student. As explained in the docstring, we could absolutely just use `Tendsto f cofinite cofinite` all the time, but (1) we lack some API for it (2) the API is nicer to setup if we have a separate def (e.g for dot notation) and (3) mentioning filters for such a simple concept is really not beginner-friendly. I'm not sure at all about the name. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict awaiting-author 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
414-57670
1 year ago
414-57670
1 year ago
6-70040
6 days
8100 digama0
author:digama0
feat: add support for other types in norm_num --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 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
414-57538
1 year ago
414-57538
1 year ago
0-0
0 seconds
15586 astrainfinita
author:astrainfinita
test make `HasQuotient` out put a `setoid` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
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
413-3546
1 year ago
413-3546
1 year ago
0-0
0 seconds
15585 FR-vdash-bot
author:FR-vdash-bot
test make `HasQuotient.quotient'` reducible --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
8/1 Mathlib/Algebra/Quotient.lean,Mathlib/GroupTheory/Coset.lean 2 1 ['github-actions'] nobody
413-3546
1 year ago
413-3546
1 year ago
0-0
0 seconds
13791 digama0
author:digama0
refactor: Primrec and Partrec General cleanup of the `Primrec` and `Partrec` files, to better adjust to lean 4 things. The main user-visible change is that `Primrec₂` is no longer a `def` but an `abbrev`, because it was causing inference issues in lean 4. I also removed all the nonterminal `simp`s in `PartrecCode.lean`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt t-computability merge-conflict 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
411-24815
1 year ago
451-49130
1 year ago
1-84718
1 day
11964 adamtopaz
author:adamtopaz
feat: The functor of points of a scheme We construct the functor of points functor, and prove that it's full and faithful. --- - [ ] depends on: #11947 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry t-category-theory merge-conflict 210/0 Mathlib.lean,Mathlib/AlgebraicGeometry/FunctorOfPoints.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean 3 4 ['github-actions', 'grunweg', 'leanprover-community-mathlib4-bot'] nobody
411-24674
1 year ago
451-49130
1 year ago
0-1223
20 minutes
12418 rosborn
author:rosborn
style: replace preimage_val with ↓∩ notation --- This is a rough draft of what the new `↓∩` notation would look like within mathlib. I believe this is an improvement in clarity and would like to have `↓∩` as a standard notation (along with `''`, `⁻¹'`, `↑`, etc...). As `↓∩` is specialized for `Set`s, I have only changed `preimage_val` when the left-hand side of `↓∩` is a `Set`. The introduction of the `↓∩` notation to Data.Set.Image is temporary as it isn't possible to import Data.Set.Subset directly. If we want `↓∩` unscoped, where would be the best place to define it? An option is Data.Set.Defs, but the notation cannot be defined without additional imports as the file does not import `notation3`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 56/61 Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Data/Set/Function.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Set/Subset.lean,Mathlib/MeasureTheory/Constructions/Polish.lean,Mathlib/MeasureTheory/MeasurableSpace/Basic.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/Order/UpperLower/Basic.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/Clopen.lean,Mathlib/Topology/Connected/Basic.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/LocalAtTarget.lean,Mathlib/Topology/LocallyConstant/Basic.lean,Mathlib/Topology/Separation.lean,Mathlib/Topology/Sober.lean 18 3 ['grunweg', 'rosborn'] nobody
411-24573
1 year ago
451-49130
1 year ago
29-14218
29 days
9978 FR-vdash-bot
author:FR-vdash-bot
chore(FieldTheory/KummerExtension): move some lemmas earlier --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author
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
411-24365
1 year ago
411-24365
1 year ago
8-83342
8 days
12429 adomani
author:adomani
feat: toND -- auto-generating natDegree This is an experiment to automatically translate theorems about `degree` to theorems about `natDegree`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra RFC t-meta merge-conflict awaiting-author
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
411-23676
1 year ago
411-23676
1 year ago
0-0
0 seconds
15823 eric-wieser
author:eric-wieser
Quotients of rings in model theory --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic merge-conflict 55/13 Mathlib/ModelTheory/Algebra/Ring/FreeCommRing.lean,Mathlib/ModelTheory/Syntax.lean 2 1 ['github-actions'] nobody
411-2239
1 year ago
411-2239
1 year ago
0-0
0 seconds
12178 joneugster
author:joneugster
feat(Data/Matrix/Basic): add notation for `m×n`-Matrices Introduce the notation `Mat[m,n][R]` for `Matrix (Fin m) (Fin n) R`. [Zulip thread](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Why.20does.20.60Matrix.2Erow.60.20use.20.20.60Unit.60.20instead.20of.20.60Fin.201.60.3F/near/427949223) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
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
410-65763
1 year ago
410-69677
1 year ago
0-0
0 seconds
12751 Command-Master
author:Command-Master
feat: add lemmas for Nat/Bits, Nat/Bitwise and Nat/Size Remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor merge-conflict 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
410-45727
1 year ago
415-61969
1 year ago
54-52408
54 days
15448 urkud
author:urkud
chore(*): deprecate `Option.elim'` Use `Option.elim` instead. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt merge-conflict awaiting-author 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
410-34780
1 year ago
411-23927
1 year ago
7-18420
7 days
10349 Shamrock-Frost
author:Shamrock-Frost
refactor(CategoryTheory/MorphismProperty) We make explicit some of the galois connections/closure operators in the existing MorphismProperty file, rewrite some proofs to take advantage of these structures, and change map/inverseImage by (1) swapping their argument order, for consistency with Set.range and Set.preimage and (2) making "map" perform the strict, evil map while "essMap" (previously called map) forms the closure of the image under isomorphisms. Finally we add `IsMultiplicative` instances for isos/epis/monos, with an eye towards constructing the wide subcategory on these classes of maps. --- - [x] depends on: #10347 - [ ] depends on: #10348 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict 474/318 Mathlib/CategoryTheory/Localization/Composition.lean,Mathlib/CategoryTheory/Localization/LocalizerMorphism.lean,Mathlib/CategoryTheory/MorphismProperty.lean,Mathlib/Data/Set/Lattice.lean,Mathlib/Order/Closure.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Hom/CompleteLattice.lean,Mathlib/Order/RelIso/Basic.lean 8 1 ['leanprover-community-mathlib4-bot'] nobody
408-48010
1 year ago
451-49130
1 year ago
0-418
6 minutes
10350 Shamrock-Frost
author:Shamrock-Frost
feat(Data/Setoid): add the operations of taking the equivalence class of an element and of saturating a set wrt an equivalence relation I'm open to suggestions about changing the name "saturate", someone on zulip rightly pointed out this is a very overloaded term in math. That said, I think it's unlikely to cause confusion and that there's only one reasonable interpretation in the context of setoids. --- - [x] depends on: #10347 - [x] depends on: #10348 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 169/3 Mathlib/Data/Setoid/Basic.lean,Mathlib/Data/Setoid/Partition.lean,Mathlib/Order/Closure.lean 3 1 ['leanprover-community-mathlib4-bot'] nobody
408-48001
1 year ago
415-61971
1 year ago
19-74514
19 days
13573 Shamrock-Frost
author:Shamrock-Frost
feat: add multivariate polynomial modules Add a type synonym for multivariate polynomials with coefficients in a module. --- Multivariate polynomials with module coefficients are sort of silly, but they sometimes show up in commutative algebra (eg in the definition of a quasi regular sequence). Writing this code involved a lot of copy and pasting from `PolynomialModule` and `MvPolynomial`. The API is definitely lacking at this stage but it's a start. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author
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
408-47981
1 year ago
414-58576
1 year ago
39-72739
39 days
6517 MohanadAhmed
author:MohanadAhmed
feat: discrete Fourier transform of a finite sequence # Discrete Fourier Transform (DFT) Matrix and DFT of a (finite) sequence This file defines the `dft` opertaion on a sequence (also a vecotr) and the DFT operation matrix ## Main definitions - `dft v`: given a sequence (v : (Fin n) → ℂ) we can transform it into a sequence (V : (Fin n) →ℂ) such that $$V [p] = ∑_{k = 0}^{N - 1} e^{-j*2πkp/n} v [k]$$ - `idft V` : given a sequence (V : (Fin n) → ℂ) we can transform it into a sequence (v : (Fin n) → ℂ) such that $$v [k] = \frac{1}{N}∑_{p = 0}^{n - 1} e^{j*2πkp/N} v [p]$$ - `dftMatrix n` : the dft matrix of dimensions $n \times n$ with the `k, p` entry equal to $$Wₙ[k, p] = e^{-j2πkp/n}$$ - `(dftMatrix n)⁻¹` : the idft matrix of dimensions $n \times n$ with the `k, p` entry equal to $$Wₙ[k, p] = (1/N) e^{j2πkp/n}$$ ## Main results - `dft v = (dftMatrix n) v` : the dft operation on a sequence is the same as the dft matrix applied to the vector - `idft V = (dftMatrix n)⁻¹ V` : the idft operation on a sequence is the same as the idft matrix applied to the vector - `dft (idft v) = dft ( idft v) = v` the dft and idft operations are inverses - `Wₙ = vandermonde (w)` : the dft matrix is vandermonde with `w` being the first row of the dft matrix - `circulant t = (dftMatrix n)⁻¹ ⬝ diagonal (dft t) ⬝ (dftMatrix n)` : a circulant matrix is diagonalizable by the dft and idft matrix pair. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author
label:t-algebra$
294/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/DFT.lean 2 26 ['MohanadAhmed', 'ericrbg'] nobody
408-47819
1 year ago
487-37409
1 year ago
65-20427
65 days
13155 alreadydone
author:alreadydone
feat(NumberTheory/EllipticDivisibilitySequence): show elliptic relations follow from even-odd recursion This PR is centered around the (generalized) elliptic relations (`rel₄`) $E(a,b,c,d): W_{a+b}W_{a-b}W_{c+d}W_{c-d}=W_{a+c}W_{a-c}W_{b+d}W_{b-d}-W_{a+d}W_{a-d}W_{b+c}W_{b-c}$. For an integer-indexed sequence W valued in a commutative ring, the relation makes sense only when a,b,c,d are all integers or all half integers. For convenience of formalization, we instead consider integers a,b,c,d of the same parity and divide all subscripts by 2. We extract the subexpression $W_{(a+b)/2}W_{(a-b)/2}$ (which appear six times) as `addMulSub W a b`. The collection of all $E(a,b,c,d)$ is equivalent to Stange's axiom for elliptic nets (`net`), and the literature (e.g. Silverman) commonly consider only the three-index special case $E(m,n,r,0)$ (`Rel₃`). Important special cases of these relations are (i) $E(m+1,m,1,0): W_{2m+1}W_1^3=W_{m+2}W_m^3-W_{m+1}^3 W_{m-1}$ (`oddRec`) and (ii) $E(m+1,m-1,1,0): W_{2m}W_2 W_1^2=W_m(W_{m+2}W_{m-1}^2-W_{m-2}W_{m+1}^2)$ (`evenRec`), which suffice to uniquely specify $W$ on all positive integers recursively from four initial values $W_1, W_2, W_3, W_4$ (`IsEllSequence.ext`, if $W_1 W_2$ is not a zero divisor). In the usual setting where $W_1=1$ and $W_2\mid W_4$, there does exist a sequence (`normEDS`) satisfying (i) and (ii) given initial values $W_2, W_3$ and $W_4/W_2$. It turns out the same non-zerodivisor condition also guarantees that W is an odd function with $W_0=0$, which naturally extends W to all integers. The main result of this PR (`rel₄_of_oddRec_evenRec`, `IsEllSequence.of_oddRec_evenRec`) is a purely algebraic proof that the sequence W defined by the single-parameter elliptic relations (i) and (ii) implies all $E(a,b,c,d)$, based on my original argument first published on [Math.SE](https://math.stackexchange.com/a/4903422/12932). It's based on the observation that a nonzerodivisor-multiple of $E(a,b,c,d)$ can be expressed as a linear combination of various $E(a,b,c_\min,d_\min)$ with the two smallest indices fixed at their minimal possible values, which can be transformed (`transf`) to an elliptic relation with smaller `a` (which can be assumed to hold by induction), unless they are of the form (i) or (ii) which hold by assumption. For this argument it's necessary to assume `a > b > c > d ≥ 0` (see `StrictAnti₄` and `Rel₄OfValid`), but it's easy to extend to arbitrary a,b,c,d by symmetry properties of `rel₄` under negation and permutations of indices. In the subsequent PR #13057, we show all normalized EDSs (`normEDS`), defined using the even-odd recursion (i)-(ii), are elliptic (i.e. satisfy the elliptic relations) divisibility sequences. This PR doesn't directly apply because a normEDS doesn't always satisfy the nonzerodivisor condition, but they are specializations of the universal normEDS, which does satisfy the condition. The technique of reducing to the universal case will be applied many times, and relies on the naturality (`map`) lemmas. We also change the `ℕ` in the definition `IsDivSequence` to `ℤ` which is more natural given that W is a `ℤ`-indexed sequence. --- - [x] depends on: #13153 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-number-theory merge-conflict awaiting-author
label:t-algebra$
565/12 Mathlib/NumberTheory/EllipticDivisibilitySequence.lean 1 55 ['Multramate', 'alreadydone', 'github-actions', 'grunweg', 'leanprover-community-mathlib4-bot'] nobody
402-61423
1 year ago
402-61423
1 year ago
26-39367
26 days
15600 adomani
author:adomani
feat: lint also `let` vs `have` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict WIP 77/26 Mathlib/Tactic/Linter/HaveLetLinter.lean,test/HaveLetLinter.lean 2 1 ['github-actions'] nobody
401-29699
1 year ago
401-29699
1 year ago
0-8
8 seconds
13970 adomani
author:adomani
feat: a linter to flag unnecessary uses of `nolint simpNF` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict 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
399-52913
1 year ago
399-52914
1 year ago
0-0
0 seconds
15162 adomani
author:adomani
feat: checkAsSorry linter A very preliminary version of the `checkAsSorry` linter. It flags declarations whose type is not equal to the 'asSorry'ed one. [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Running.20Mathlib.20under.20.60set_option.20debug.2EbyAsSorry.60) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict 119/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/CheckAsSorry.lean,test/CheckAsSorry.lean 4 1 ['github-actions'] nobody
399-51901
1 year ago
399-51901
1 year ago
0-0
0 seconds
14046 adomani
author:adomani
test: diff of declarations in lean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 231/2 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,.github/workflows/mk_build_yml.sh,Mathlib/Tactic/Eval.lean,scripts/decls_diff_hybrid.sh,scripts/list_decls.lean 8 2 ['github-actions'] nobody
395-45415
1 year ago
395-45415
1 year ago
0-0
0 seconds
14038 adomani
author:adomani
test/decl diff in lean dev --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 231/2 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,.github/workflows/mk_build_yml.sh,Mathlib/Tactic/Eval.lean,scripts/decls_diff_hybrid.sh,scripts/list_decls.lean 8 3 ['github-actions'] nobody
395-45415
1 year ago
395-45415
1 year ago
0-0
0 seconds
12107 yuma-mizuno
author:yuma-mizuno
feat(Mathlib/Tactic/Widget/StringDiagram): support 2-morphisms in bicategories --- - [x] depends on: #11080 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory t-meta merge-conflict 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
390-40159
1 year ago
390-40162
1 year ago
0-0
0 seconds
15925 yuma-mizuno
author:yuma-mizuno
feat(CategoryTheory/Monoida): proof producing coherence tactic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory t-meta merge-conflict 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 n/a ['github-actions'] nobody
390-296
1 year ago
unknown
unknown
6475 joneugster
author:joneugster
refactor(LinearAlgebra/Span): replace ∙ with • as notation for `span R {x}` Change the notation for `Submodule.span R {x}` from `R ∙ x` to the bullet `R • x`, which is also used for scalar multiplication. --- (this was an experiment originating from a [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/.2E.C2.B7.E2.AC.9D.20.5Brant.5D), I don't have a clear opinion if this is actually a desired thing to do...) Generally this works and Lean seems to do fine figuring out the difference between `r • x` and `R • x` (The former is scalar multiplication in an `R`-module `M`, the latter is the `Submodule R M` generated by `x`). Encountered a few regressions that should be considered (the first two might be also bugs that could be looked at independently): 1. `(· • ·)`, and general simple function syntax, does not work as notation for `HSMul.hSMul` anymore. For this reason, I introduced the notation `scoped` to minimise the effect of this. Now it's only a problem if you `open Span`. Note that `fun x₁ x₂ ↦ x₁ • x₂` works flawlessly all the time. 4. `change` and `convert` have troubles to deal with the two competing notations. `have := _; convert this` works. 5. `R • x - y` is not valid anymore and needs parentheses: `R • (x - y)`. I do think this actually helps readability, so I don't mind. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra RFC merge-conflict
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
388-65052
1 year ago
388-65052
1 year ago
0-0
0 seconds
7545 shuxuezhuyi
author:shuxuezhuyi
feat: APIs of `Function.extend f g e'` when `f` is injective We characterizes `range g`, `Injective g`, `Surjective g` and `Bijective g` in terms of `extend f g e'`.​ --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic merge-conflict awaiting-author 50/0 Mathlib.lean,Mathlib/Logic/Function/ApiForExtend.lean 2 1 ['fpvandoorn'] nobody
387-80588
1 year ago
387-80588
1 year ago
32-30254
32 days
12632 urkud
author:urkud
feat(List/OffDiag): new file --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict awaiting-author 184/3 Mathlib.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Enum.lean,Mathlib/Data/List/EraseIdx.lean,Mathlib/Data/List/OffDiag.lean 5 3 ['eric-wieser', 'github-actions', 'urkud'] nobody
384-51403
1 year ago
384-51403
1 year ago
0-0
0 seconds
16658 adomani
author:adomani
add tips file --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) test-ci merge-conflict awaiting-author WIP 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
384-23121
1 year ago
384-23121
1 year ago
0-0
0 seconds
14078 Ruben-VandeVelde
author:Ruben-VandeVelde
feat(CI): continue after mk_all fails --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI merge-conflict awaiting-author 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
384-3421
1 year ago
384-3421
1 year ago
0-0
0 seconds
11800 JADekker
author:JADekker
feat : Define KappaLindelöf spaces Define KappaLindelöf spaces by following the first one-third of the API for Lindelöf spaces. The remainder will be added in a future PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-topology merge-conflict please-adopt 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
382-80598
1 year ago
383-16173
1 year ago
119-10687
119 days
11283 hmonroe
author:hmonroe
feat(ModelTheory/Satisfiability): define theory with independent sentence --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic merge-conflict WIP 8/0 Mathlib/ModelTheory/Satisfiability.lean 1 2 ['fpvandoorn', 'hmonroe'] nobody
381-60375
1 year ago
381-60375
1 year ago
3-5240
3 days
16914 siddhartha-gadgil
author:siddhartha-gadgil
Loogle syntax with non-reserved This is PR mainly to test that loogle syntax does not break stuff downstream --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 4/4 lake-manifest.json,lakefile.lean 2 1 ['github-actions'] nobody
379-48984
1 year ago
379-48984
1 year ago
0-14835
4 hours
10991 thorimur
author:thorimur
feat: `tfae` block tactic This PR introduces `tfae` block tactic syntax: ```lean tfae 1 → 2 := /- proof of `P₁ → P₂` -/ 2 → 3 := /- proof of `P₂ → P₃` -/ 3 → 1 := /- proof of `P₃ → P₁` -/ ``` Like the recent change to `tfae_have`, this syntax also supports all sorts of matching that `have` itself supports: ```lean tfae 2 → 3 | h₂ => /- proof of `P₃` -/ 3 → 1 -- given `P₁ := ∀(a : A), (b : B), (c : C), X`: | h₃, a, b, c => /- proof of `X` -/ ⟨h_mp, h_mpr⟩ : 1 ↔ 2 := /- proof of `P₁ ↔ P₂`; puts `h_mp : P₁ → P₂`, `h_mpr : P₂ → P₁` in the lctx -/ ``` This initial implementation is currently very simple, and relies on `tfae_have` and `tfae_finish`. Although we intend to migrate away from that syntax, this PR does not remove support for it or deprecate `tfae_have`/`tfae_finish` in any way; migration (but not deprecation) is done in #11003. --- - [ ] depends on: #10653 - [x] depends on: #10994 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict modifies-tactic-syntax WIP 392/124 Mathlib/Tactic/TFAE.lean,scripts/noshake.json,test/tfae.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
378-72638
1 year ago
378-72638
1 year ago
0-0
0 seconds
16464 Parcly-Taxel
author:Parcly-Taxel
chore: deprecate `Nat.(case_)strong_induction_on` …in favour of the now-renamed `Nat.(case)strongInductionOn` in core. tech debt merge-conflict 54/56 Archive/Imo/Imo1981Q3.lean,Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/ContinuedFractions/Computation/TerminatesIffRat.lean,Mathlib/Algebra/ContinuedFractions/ConvergentsEquiv.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Lifts.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Hofer.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/Combinatorics/Derangements/Finite.lean,Mathlib/Combinatorics/Enumerative/Catalan.lean,Mathlib/Combinatorics/Hall/Finite.lean,Mathlib/Combinatorics/SetFamily/AhlswedeZhang.lean,Mathlib/Computability/Primrec.lean,Mathlib/Data/Fintype/Basic.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Data/Nat/Choose/Central.lean,Mathlib/Data/Nat/Defs.lean,Mathlib/Data/Nat/Digits.lean,Mathlib/Data/Nat/Log.lean,Mathlib/FieldTheory/Separable.lean,Mathlib/LinearAlgebra/Eigenspace/Triangularizable.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/NumberTheory/BernoulliPolynomials.lean,Mathlib/NumberTheory/DiophantineApproximation.lean,Mathlib/NumberTheory/Pell.lean,Mathlib/NumberTheory/Primorial.lean,Mathlib/Order/Fin/Basic.lean,Mathlib/RingTheory/Adjoin/PowerBasis.lean,Mathlib/RingTheory/LittleWedderburn.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Basic.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Eval.lean,Mathlib/RingTheory/Polynomial/Eisenstein/IsIntegral.lean,Mathlib/RingTheory/Polynomial/Nilpotent.lean,Mathlib/RingTheory/PowerSeries/Basic.lean,Mathlib/RingTheory/QuotientNilpotent.lean,Mathlib/RingTheory/WittVector/Defs.lean,Mathlib/RingTheory/WittVector/Frobenius.lean,Mathlib/RingTheory/WittVector/StructurePolynomial.lean,Mathlib/SetTheory/Surreal/Dyadic.lean,Mathlib/Topology/Metrizable/Uniformity.lean 43 13 ['Parcly-Taxel', 'b-mehta', 'github-actions', 'jcommelin'] nobody
378-34283
1 year ago
378-34283
1 year ago
8-1989
8 days
8118 iwilare
author:iwilare
feat(CategoryTheory): add dinatural transformations A starting point to define [dinatural transformations](https://ncatlab.org/nlab/show/dinatural+transformation). This is my first PR so style comments and improvements are very welcome! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict awaiting-author 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
374-71270
1 year ago
374-71271
1 year ago
21-9462
21 days
17171 FR-vdash-bot
author:FR-vdash-bot
test extends carrier and property --- We need https://github.com/leanprover/lean4/issues/2666 ... [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 433/309 Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Directed.lean,Mathlib/Algebra/DirectSum/Decomposition.lean,Mathlib/Algebra/Field/Subfield.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/MulOpposite.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Group/Submonoid/MulOpposite.lean,Mathlib/Algebra/Group/Submonoid/Pointwise.lean,Mathlib/Algebra/Group/Submonoid/Units.lean,Mathlib/Algebra/Group/Subsemigroup/Basic.lean,Mathlib/Algebra/Group/Subsemigroup/Operations.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/Module/Submodule/Lattice.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/MulOpposite.lean,Mathlib/Algebra/Ring/Subsemiring/Order.lean,Mathlib/Algebra/Star/Subalgebra.lean,Mathlib/Algebra/Star/Subsemiring.lean,Mathlib/Data/Complex/Module.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/Deprecated/Subfield.lean,Mathlib/Deprecated/Subgroup.lean,Mathlib/Deprecated/Submonoid.lean,Mathlib/Deprecated/Subring.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/GroupTheory/DoubleCoset.lean,Mathlib/GroupTheory/Finiteness.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/NonUnitalSubring/Basic.lean,Mathlib/RingTheory/NonUnitalSubsemiring/Basic.lean,Mathlib/SetTheory/Cardinal/Subfield.lean,Mathlib/Topology/Algebra/Algebra.lean,Mathlib/Topology/Algebra/OpenSubgroup.lean 42 1 ['github-actions'] nobody
370-29963
1 year ago
370-29963
1 year ago
0-0
0 seconds
7516 ADedecker
author:ADedecker
perf: use `abbrev` to prevent unifying useless data --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 4/3 Mathlib/Topology/ContinuousFunction/Bounded.lean 1 3 ['ADedecker', 'leanprover-bot', 'mattrobball'] nobody
369-1623
1 year ago
369-1623
1 year ago
0-0
0 seconds
17127 FR-vdash-bot
author:FR-vdash-bot
chore: remove global `Quotient.mk` `⟦·⟧` notation --- Merge this PR when we are ready to migrate to `QuotLike` API (#16421). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 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
368-83066
1 year ago
368-83066
1 year ago
4-72805
4 days
14712 FR-vdash-bot
author:FR-vdash-bot
perf: change instance priority and order about `OfNat` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) slow-typeclass-synthesis t-algebra merge-conflict delegated
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 24 ['FR-vdash-bot', 'MichaelStollBayreuth', 'eric-wieser', 'github-actions', 'j-loreaux', 'leanprover-bot', 'mathlib-bors'] nobody
362-59619
11 months ago
364-83095
11 months ago
20-15089
20 days
11500 mcdoll
author:mcdoll
refactor(Topology/Algebra/Module/WeakDual): Clean up - Move `Dual` and `dualPairing` lower in the import-hierachy - deduplicate `dualPairing` - Bundle continuity statements to `CLM`s. - Make `WeakDual` and `WeakSpace` reducible - Remove `refine'` in favor of `refine` --- Cleaning up `Analysis/NormedSpace/WeakDual` will be done in a second PR [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict awaiting-author 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 14 ['ADedecker', 'grunweg', 'j-loreaux', 'kkytola', 'mathlib-bors', 'mcdoll'] nobody
360-81562
11 months ago
360-81562
11 months ago
46-5572
46 days
5995 FR-vdash-bot
author:FR-vdash-bot
feat: add APIs about `Quotient.choice` Some docs in this PR refer to the definition in #5576. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data RFC merge-conflict awaiting-author 76/6 Mathlib/Data/Quot.lean 1 3 ['FR-vdash-bot', 'YaelDillies', 'gebner'] eric-wieser
assignee:eric-wieser
359-41808
11 months ago
359-41808
11 months ago
285-35716
285 days
8029 alreadydone
author:alreadydone
refactor: Homotopy between Functions not ContinuousMaps This allows talking about homotopies without needing to supply proofs of continuity for the two ends. This for example simplifies the definition of H-spaces. Of course, if a homotopy exists between two functions, those two functions are automatically continuous because they are restrictions of the homotopy (which is continuous) to subspaces. `Homotopy.refl` still needs a continuous map as input, and `Homotopic` is only an equivalence relation when restricted to ContinuousMap. --- TODO: fix docstrings [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology RFC merge-conflict 246/250 Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/Topology/Homotopy/Basic.lean,Mathlib/Topology/Homotopy/Contractible.lean,Mathlib/Topology/Homotopy/Equiv.lean,Mathlib/Topology/Homotopy/HSpaces.lean,Mathlib/Topology/Homotopy/HomotopyGroup.lean,Mathlib/Topology/Homotopy/Path.lean,Mathlib/Topology/Homotopy/Product.lean 8 3 ['alreadydone', 'urkud'] nobody
359-25471
11 months ago
451-49130
1 year ago
9-20043
9 days
14619 Command-Master
author:Command-Master
chore: Merge `Trunc` to `Squash` Remove `Trunc` and use `Squash` instead --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict WIP 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
356-74149
11 months ago
441-45893
1 year ago
0-0
0 seconds
13156 erdOne
author:erdOne
refactor(Algebra/Module/LocalizedModule): Redefine `LocalizedModule` in terms of `OreLocalization`. --- - [x] depends on: #13151 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
519/628 Mathlib.lean,Mathlib/Algebra/Module/LocalizedModule.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/Localization/BaseChange.lean,Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/OreLocalization/Module.lean,Mathlib/RingTheory/OreLocalization/Ring.lean 8 4 ['github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mattrobball'] nobody
354-48948
11 months ago
354-48948
11 months 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. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order t-topology merge-conflict awaiting-author 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
354-48572
11 months ago
354-48572
11 months ago
3-83049
3 days
16984 hrmacbeth
author:hrmacbeth
feat: extend `module` tactic to handle multiple rings, not strictly ordered by inclusion The `module` tactic currently in Mathlib handles scalars from multiple rings, but only if for any two rings `R` and `S` which appear, either `R` is an algebra over `S` or vice versa. This PR extends the tactic by providing a syntax `module T`, which will handle scalars from any ring `R` which `T` is an algebra over. For example, ```lean example : (2:ℤ) • x = (2:ℚ≥0) • x := by module ``` fails since `ℤ` is not a `ℚ≥0`-algebra and `ℚ≥0` is not a `ℤ`-algebra, but ```lean example : (2:ℤ) • x = (2:ℚ≥0) • x := by module ℚ ``` works since `ℚ` is both a `ℤ`-algebra and a `ℚ≥0`-algebra. This PR is a quick proof-of-concept implementation, just to record the desired approach and tactic syntax. It should not be merged as-is. It has with a lot of code duplication and should be rewritten more efficiently (for example, `parse` and `parseEnsuringType` should be merged to a single function, and the `some`/`none` cases in `matchScalarsAux` should be merged to a uniform treatment) before being considered for merging to Mathlib. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 158/35 Mathlib/Tactic/Module.lean,test/module.lean 2 1 ['github-actions'] nobody
350-71012
11 months ago
350-71012
11 months ago
0-0
0 seconds
12414 adomani
author:adomani
test: lint and unlint `·` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 64/14 Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib/Algebra/Module/Submodule/Bilinear.lean,Mathlib/Tactic/Linter/Multigoal.lean,test/Multigoal.lean 4 4 ['adomani', 'github-actions', 'grunweg', 'leanprover-bot'] nobody
346-46797
11 months ago
346-46797
11 months ago
0-0
0 seconds
16925 YnirPaz
author:YnirPaz
feat(SetTheory/Cardinal/Cofinality): aleph index of singular cardinal has infinite cofinality Prove `Ordinal.aleph0_le_cof_of_not_isRegular`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory merge-conflict WIP 6/0 Mathlib/SetTheory/Cardinal/Cofinality.lean 1 4 ['YnirPaz', 'github-actions', 'vihdzp'] nobody
345-18379
11 months ago
345-18379
11 months ago
2-57220
2 days
16647 eric-wieser
author:eric-wieser
feat: partitions of lists The length of this list is the bell numbers. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data t-combinatorics merge-conflict 311/0 Mathlib.lean,Mathlib/Data/List/Partition.lean 2 1 ['github-actions'] nobody
343-67271
11 months ago
343-67271
11 months ago
0-0
0 seconds
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. t-data new-contributor merge-conflict please-adopt 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', 'leanprover-community-mathlib4-bot', 'urkud', 'vihdzp'] YaelDillies
assignee:YaelDillies
338-21566
11 months ago
364-76757
11 months ago
12-48560
12 days
5364 thorimur
author:thorimur
feat: `wlog ... replacing` This allows hypotheses to be removed from the set of generalized hypotheses. E.g. `wlog h : P replacing h'` will remove `h'` from the hypotheses of the type of `this` and from the context of the goal that will suppose `h`. See [zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/wlog.20.2E.2E.2E.20replacing.20.2E.2E.2E.3F). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 125/18 Mathlib/Tactic/WLOG.lean,test/wlog.lean 2 2 ['thorimur', 'urkud'] nobody
334-8223
11 months ago
334-8223
11 months ago
0-0
0 seconds
9654 urkud
author:urkud
feat: add `@[mk_eq]` version of `@[mk_iff]` The new attribute generates theorems like ```lean List.chain_eq : @List.Chain = fun {α} R a a_1 => a_1 = [] ∨ ∃ b l, R a b ∧ List.Chain R b l ∧ a_1 = b :: l ``` and is useful to rewrite in a theorem that argues about the properties of an unapplied inductive predicate. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict awaiting-author 63/9 Mathlib/Lean/Meta.lean,Mathlib/Tactic/MkIffOfInductiveProp.lean,test/MkIffOfInductive.lean 3 6 ['Vierkantor', 'github-actions', 'urkud'] nobody
334-7977
11 months ago
334-7977
11 months ago
25-70815
25 days
16704 AntoineChambert-Loir
author:AntoineChambert-Loir
feat(Mathlib.Data.Ordering.Dickson): Dickson orders Dickson orders are a particular class of well founded orders characterized by the fact that every nonempty set has finitely many minimal elements. They appear in the classical theory of Groebner bases because it is easier to prove that some sets are well founded using this property. WiP. In the `tfae` function, property 2 is exactly `Set.PartiallyWellOrderedOn`, so the PR should be rewritten so as to use that property (and not define `IsDickson`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict WIP 324/0 Mathlib.lean,Mathlib/Data/Ordering/Dickson.lean,scripts/noshake.json 3 9 ['AntoineChambert-Loir', 'b-mehta', 'github-actions'] nobody
333-72934
10 months ago
333-72934
10 months ago
2-84515
2 days
16355 Ruben-VandeVelde
author:Ruben-VandeVelde
feat: odd_{add,sub}_one --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-number-theory merge-conflict awaiting-author
label:t-algebra$
12/0 Mathlib/Algebra/Ring/Int.lean,Mathlib/Algebra/Ring/Parity.lean 2 4 ['Ruben-VandeVelde', 'github-actions', 'urkud'] nobody
333-20731
10 months ago
333-20731
10 months ago
0-57608
16 hours
8479 alexjbest
author:alexjbest
feat: use leaff in CI [Leaff](https://github.com/alexjbest/leaff) is an experimental lean-diff tool, this PR is to experiment with adding it as a CI step. --- I'm not sure yet if it is best to have this always run or only run on request (like bench). If it is always run should it post a comment or simply leave its output it the actions log (maybe as a summary object) the current iteration runs and updates a sticky comment with the latest result [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author WIP 340/0 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml 4 11 ['alexjbest', 'github-actions', 'grunweg', 'kim-em', 'mathlib-bors', 'urkud'] nobody
333-11485
10 months ago
333-11499
10 months ago
0-0
0 seconds
8638 alreadydone
author:alreadydone
refactor: noncommutative tensor product Co-authored-by: Eric Wieser Co-authored-by: Jujian Zhang This draft PR currently only generalizes a single file TensorProduct.lean; it allows TensorProduct to be taken over a non-commutative ring. Most of the declarations in TensorProduct.lean are now generalized to the non-commutative setting, and very few are deleted (their commutative version will be restored in another file). Next plans: + Change the namespace in TensorProduct.lean from TensorProduct to NonCommTensorProduct, and remove the #aligns + I plan to use the same notation for the non-commutative and the commutative TensorProduct, and the user will need to `open scoped` different namespaces to use the one of their choice. + Start a new file TensorProduct/Comm.lean, copy the content of TensorProduct.lean on master into it, change the definition TensorProduct to be semi-reducibly defeq to NonCommTensorProduct (in order to support more instances or unify non-defeq instances that become prop-eq in the commutative setting, e.g. we've chosen the R-action on a tensor product over commutative R to come from the left factor, since the action from the right factor is the same), and reuse the NonComm constructions as much as possible. We then change all files that imports TensorProduct.lean to import TensorProduct/Comm.lean instead. Once we do that, mathlib would compile and this PR would be complete. We can gradually generalize other files about tensor products this way. In this PR: `TensorProduct.map` is now defined in terms of `lTensor` and `rTensor` rather than the other way around, which requires moving `lTensor` and `rTensor` up from their original location. The definition of `rid` also becomes more challenging and is moved down. An evident observation is that actions on the domain of AddMonoidHom / LinearMap is really natural in the context of tensor products and Hom-tensor adjunction (`TensorProduct.lift`), not the default actions on the codomain. For example, it allows us to write the "balanced biadditive monoid homs" in #8536 as simply `N →ₗ[R] M →+ P` (where the right R-action on M turns into the left action on `M →+ P`). For this reason, we disable the default instances `AddMonoidHom/LinearMap.module` at the beginning of the file and enable the `AddMonoidHom/LinearMap.domModule` instances instead. (The action on the codomain would be necessary for the non-commutative version of [TensorProduct.lTensorHomToHomLTensor](https://leanprover-community.github.io/mathlib4_docs/Mathlib/LinearAlgebra/TensorProduct.html#TensorProduct.lTensorHomToHomLTensor) (in the form of `P ⊗[R] (M →+ Q) →+ M →+ P ⊗[R] Q`), but I've deleted it for now.) We register actions on the left factor of a tensor product as the default instance, but we also talk about actions on the right factor (`attribute [local instance] rightModule`). The Tensor-Hom adjunction #8495 is now `uncurryEquiv` in this PR. #8519 is now included in this PR and #8584 is now called `lift` in this PR. `CharacterModule.homEquiv` in #8559 can be obtained by combining `liftEquiv` and `flipMop` in this PR (except for a mop). To refactor the commutative tensor product, we'd need to transfer many R^mop-action to R-action and R^mop-LinearMaps to R-LinearMaps, which can be achieved via `Module.compHom` and `LinearMap.restrictScalars` (requires `LinearMap.CompatibleSMul` instance) given `RingEquiv.toOpposite`. `LinearMap.characterfy` and `CharacterModule.cong` could be obtained from `LinearMap.compAddMonoidHom` in this PR. TODO: + Move delarations that belong to other files. + Change docstrings that are no longer accurate. + Fix some argument order to be more natural. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict WIP
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
332-46944
10 months ago
451-49130
1 year ago
0-0
0 seconds
14598 Command-Master
author:Command-Master
chore: add typeclasses to unify various `add_top`, `add_eq_top`, etc. Add the four typeclasses `IsTopAbsorbing`, `IsBotAbsorbing`, `NoTopSum`, `NoBotSum`, as additive equivalents for `MulZeroClass` and `NoZeroDivisors`. Add instances of these for `ENNReal`, `WithTop α`, `WithBot α`, `PUnit`, `EReal`, `PartENat`, `Measure`, `Interval` and `Filter`. Also split `Algebra/Order/AddGroupWithTop` to `Algebra/Order/Group/WithTop` and `Algebra/Order/Monoid/WithTop` --- Previous usages of lemmas with quantified names like `WithTop.add_top` have to be changed to just `add_top`. `add_lt_top` is `@[simp]`, in accordance with `ENNReal.add_lt_top` being `@[simp]`. This affects `WithTop.add_lt_top` which previously hadn't been `@[simp]`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order t-algebra merge-conflict
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
331-78532
10 months ago
331-78532
10 months ago
7-45599
7 days
12778 MichaelStollBayreuth
author:MichaelStollBayreuth
perf: decouple algebraic and order hierarchies in type class search Based on the experience gained with [#12680](https://github.com/leanprover-community/mathlib4/pull/12680), this attempts to decouple the algebraic and order hierarchies in type class search. * We lower the priorities of instances like `OrderedSemiring.toSemiring` (which are generated by the `extends` clause with default priority 1000) to 50. * Additionally, we make the default priority available via `open scoped AlgebraOrderInstances` and use that where appropriate. **Motivation:** Looking at instance synthesization traces, it appears that when (e.g.) presented with the goal to find a `Semiring` instance, the algorithm frequently goes down a rabbit hole trying and failing to find order instances. This seems to be caused by the presence of instances like `OrderedSemiring.toSemiring` with default priority, which are tried early in the search, but lead nowhere (after a fairly long time). These instances are created by declarations of the form ```lean class OrderedSemiring (α : Type u) extends Semiring α, OrderedAddCommMonoid α where ... ``` which automatically sets up (among other things) an instance `OrderedSemiring.toSemiring` with default piority. It appears that these instances cannot be removed completely (only locally in a module), so the next best solution is to make them low priority (which is possible also for downstream modules). To provide for situations where these instances are desired, we put a default priority version in the scope `AlgebraOrderInstances`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) slow-typeclass-synthesis t-order t-algebra merge-conflict
label:t-algebra$
306/27 Mathlib/Algebra/Algebra/Subalgebra/Order.lean,Mathlib/Algebra/ContinuedFractions/Computation/ApproximationCorollaries.lean,Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/Module/Rat.lean,Mathlib/Algebra/Module/Submodule/Order.lean,Mathlib/Algebra/Order/AbsoluteValue.lean,Mathlib/Algebra/Order/Algebra.lean,Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/BigOperators/Group/Finset.lean,Mathlib/Algebra/Order/BigOperators/Group/List.lean,Mathlib/Algebra/Order/BigOperators/Group/Multiset.lean,Mathlib/Algebra/Order/BigOperators/Ring/Finset.lean,Mathlib/Algebra/Order/BigOperators/Ring/List.lean,Mathlib/Algebra/Order/BigOperators/Ring/Multiset.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Order/Chebyshev.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Field/Pi.lean,Mathlib/Algebra/Order/Floor.lean,Mathlib/Algebra/Order/Floor/Div.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Group/Units.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Hom/Basic.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Algebra/Order/Interval/Set/Instances.lean,Mathlib/Algebra/Order/Invertible.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/Module/Algebra.lean,Mathlib/Algebra/Order/Module/Defs.lean,Mathlib/Algebra/Order/Module/Pointwise.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/OrderDual.lean,Mathlib/Algebra/Order/Monoid/Prod.lean,Mathlib/Algebra/Order/Nonneg/Field.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Pi.lean,Mathlib/Algebra/Order/Positive/Field.lean,Mathlib/Algebra/Order/Positive/Ring.lean,Mathlib/Algebra/Order/Rearrangement.lean,Mathlib/Algebra/Order/Ring/Basic.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/InjSurj.lean,Mathlib/Algebra/Order/Ring/Pow.lean,Mathlib/Algebra/Order/Sub/WithTop.lean,Mathlib/Algebra/Order/ToIntervalMod.lean,Mathlib/Algebra/Ring/BooleanRing.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/Analysis/BoundedVariation.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Metric.lean,Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/Convex/Cone/Basic.lean,Mathlib/Analysis/Convex/Cone/Closure.lean,Mathlib/Analysis/Convex/Cone/Pointed.lean,Mathlib/Analysis/Convex/Cone/Proper.lean,Mathlib/Analysis/Convex/Exposed.lean,Mathlib/Analysis/Convex/Extrema.lean,Mathlib/Analysis/Convex/Function.lean,Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Convex/GaugeRescale.lean,Mathlib/Analysis/Convex/Hull.lean,Mathlib/Analysis/Convex/Join.lean,Mathlib/Analysis/Convex/Mul.lean,Mathlib/Analysis/Convex/Quasiconvex.lean,Mathlib/Analysis/Convex/SpecificFunctions/Pow.lean,Mathlib/Analysis/Convex/Star.lean,Mathlib/Analysis/Convex/Strict.lean,Mathlib/Analysis/InnerProductSpace/Orientation.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/SpecialFunctions/Gamma/BohrMollerup.lean,Mathlib/Analysis/SpecialFunctions/Polynomials.lean,Mathlib/Analysis/SpecificLimits/FloorPow.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/Combinatorics/Optimization/ValuedCSP.lean,Mathlib/Combinatorics/Pigeonhole.lean,Mathlib/Combinatorics/SetFamily/FourFunctions.lean,Mathlib/Data/DFinsupp/Lex.lean,Mathlib/Data/DFinsupp/Multiset.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finset/MulAntidiagonal.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/Finsupp/Multiset.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Int/Log.lean,Mathlib/Data/Multiset/Antidiagonal.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Multiset/Bind.lean,Mathlib/Data/Nat/Cast/Field.lean,Mathlib/Data/Nat/Cast/Order/Basic.lean,Mathlib/Data/Nat/Choose/Bounds.lean,Mathlib/Data/PNat/Factors.lean,Mathlib/Data/Rat/Denumerable.lean,Mathlib/Data/Set/Pointwise/Interval.lean 135 34 ['MichaelStollBayreuth', 'YaelDillies', 'github-actions', 'leanprover-bot'] nobody
331-77435
10 months ago
331-77435
10 months ago
18-19513
18 days
18636 adomani
author:adomani
Test/latest import report dev This PR is a test accompanying #18631. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI merge-conflict 147/0 .github/workflows/latest_import.yml,lakefile.lean 2 1 ['github-actions'] nobody
330-65803
10 months ago
330-65803
10 months ago
0-0
0 seconds
16885 metinersin
author:metinersin
feat(ModelTheory/Complexity): define literals Defines `FirstOrder.Language.BoundedFormula.IsLiteral` and `FirstOrder.Language.BoundedFormula.simpleNot` - an auxiliary operation that takes the negation of a formula and does some simplification. --- - [x] depends on: #16800 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-logic merge-conflict awaiting-author 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
329-34653
10 months ago
329-34653
10 months ago
0-19926
5 hours
9341 winstonyin
author:winstonyin
feat: Naturality of integral curves Let `v` and `v'` be sections of the tangent bundle of manifolds `M` and `M'`, respectively, and let `f : M → M'` be a differentiable map. Then `f` maps integral curves of `v` to integral curves of `v'` if and only if `v` and `v'` are `f`-related. - [x] depends on: #8483 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict awaiting-author 45/0 Mathlib/Geometry/Manifold/IntegralCurve.lean,Mathlib/Topology/Algebra/Module/Basic.lean 2 n/a ['github-actions', 'grunweg', 'leanprover-community-mathlib4-bot', 'winstonyin'] nobody
326-76
10 months ago
unknown
unknown
13248 hcWang942
author:hcWang942
feat: basic concepts of auction theory ## Description Formalise some core concepts and results in auction theory: this includes definitions for first-price and second-price auctions, as well as several fundamental results and helping lemmas. This is the very first PR of the project formalizing core concepts and results in auction theory. Our group is working on more contributions on the formalization of game theory prefix. Co-authored-by: Ma Jiajun ## Reference Roughgarden, Tim. ***Twenty Lectures on Algorithmic Game Theory***. Cambridge University Press, 2020. [Link](https://www.cambridge.org/core/books/twenty-lectures-on-algorithmic-game-theory/A9D9427C8F43E7DAEF8C702755B6D72B) --- - [x] Will depend on #14163 once that PR is merged. The Fintype lemmas introduced by this PR have been added in that PR and will be removed from here once that PR gets merged ## Current plan for formalization of Game Theory The current plan for the formalizing of Game Theory include: #### 1. Auction Theory. 🎉 _(200+ lines, this PR)_ - Essential definitions of Sealed-bid auction, First-price auction and Second-price auction. - First-price auction has no dominant strategy. - Second-price auction has dominant strategy. (Second-price auction is DSIC) #### 2. Mechanism design & Myerson's Lemma. 🎉 (400+ lines, pending for modification to Mathlib Standard) - Mechanism design An allocation rule is implementable if there exists - Dominant Strategy Incentive Compatible (DSIC) payment rule - An allocation rule is monotone if for every bidder’s gain is nondecreasing w.r.t. her/his bid - Myerson's Lemma Implementable ⇔ Monotone In the above case, the DSIC payment rule is unique. #### 3. von Neumann‘s Minimax Theorem. 🎉 (800+ lines, pending for modification to Mathlib Standard) - Equilibrium in zero sum game - Formalization strategy: via Loomis’s theorem. #### 4. Nash Equilibrium. 🎉 (pending for modification to Mathlib Standard) #### 5. Brouwer fixed-point theorem. (Work in Progress) #### 6. More Mechanism design. (Planning) new-contributor t-logic merge-conflict awaiting-author 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
324-73485
10 months ago
unknown
unknown
17675 FR-vdash-bot
author:FR-vdash-bot
perf: do not search algebraic hierarchy when searching `FunLike` hierarchy --- Unification is still very slow. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) slow-typeclass-synthesis t-algebra merge-conflict
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 ['FR-vdash-bot', 'github-actions', 'leanprover-bot'] nobody
324-48618
10 months ago
324-48618
10 months ago
0-0
0 seconds
9344 erdOne
author:erdOne
feat: Add `AddGroup.FG` -> `Module.Finite ℤ` as instances --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author
label:t-algebra$
4/0 Mathlib/RingTheory/Finiteness.lean 1 4 ['alreadydone', 'erdOne', 'leanprover-bot'] nobody
323-57878
10 months ago
323-57878
10 months ago
0-0
0 seconds
12133 ADedecker
author:ADedecker
feat: generalize instIsLowerProd to arbitrary products Also change a bit the proof of the product case to match my own taste, feel free to tell if you prefer the old one. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order t-topology merge-conflict awaiting-author 34/14 Mathlib/Topology/Constructions.lean,Mathlib/Topology/Order/LowerUpperTopology.lean 2 13 ['Ruben-VandeVelde', 'TwoFX', 'github-actions', 'jcommelin', 'mans0954', 'mathlib-bors', 'riccardobrasca'] nobody
322-67632
10 months ago
322-67632
10 months ago
63-69206
63 days
16637 FR-vdash-bot
author:FR-vdash-bot
perf: reorder `extends` of `(Add)Monoid` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict WIP
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 ['FR-vdash-bot', 'github-actions', 'leanprover-bot'] nobody
322-66870
10 months ago
322-66870
10 months ago
1-49655
1 day
18765 FR-vdash-bot
author:FR-vdash-bot
chore: changing `outParam` of `MulActionSemiHomClass` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
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 ['FR-vdash-bot', 'github-actions', 'leanprover-bot'] nobody
322-23131
10 months ago
322-23131
10 months ago
0-0
0 seconds
14739 urkud
author:urkud
feat(Measure): add `gcongr` lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability merge-conflict awaiting-author WIP help-wanted 12/8 Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/Probability/Kernel/Disintegration/Density.lean 5 3 ['github-actions', 'kim-em', 'urkud'] nobody
321-66566
10 months ago
321-66566
10 months ago
0-66587
18 hours
15822 kmill
author:kmill
feat: greedy colorings of finite graphs Proves that the greedy coloring only takes `G.maxDegree + 1` colors. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics merge-conflict 159/0 Mathlib/Combinatorics/SimpleGraph/ConcreteColorings.lean 1 1 ['github-actions'] nobody
319-48324
10 months ago
319-48324
10 months ago
0-0
0 seconds
8661 joelriou
author:joelriou
feat(CategoryTheory/Sites): descent of sheaves In this PR, it is shown that the category of sheaves on a site `(C, J)` identifies as a full subcategory of a category of families of sheaves equipped with a descent data (for a family of objects which cover the final object). Under suitable conditions, it shall be shown that this is an equivalence of categories (TODO). --- This shall be split in small PRs later. - [x] depends on: #8622 - [x] depends on: #8632 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict WIP 1396/26 Mathlib.lean,Mathlib/CategoryTheory/Over.lean,Mathlib/CategoryTheory/Sites/CoverPreserving.lean,Mathlib/CategoryTheory/Sites/Descent.lean,Mathlib/CategoryTheory/Sites/EqualizerSheafCondition.lean,Mathlib/CategoryTheory/Sites/InducedTopology.lean,Mathlib/CategoryTheory/Sites/ObjectsCoverTop.lean,Mathlib/CategoryTheory/Sites/Over.lean,Mathlib/CategoryTheory/Sites/SheafHom.lean,Mathlib/CategoryTheory/Sites/Sieves.lean 10 3 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
319-43852
10 months ago
612-66325
1 year ago
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
319-25495
10 months ago
319-25495
10 months ago
0-0
0 seconds
10476 shuxuezhuyi
author:shuxuezhuyi
feat(Topology/UniformSpace): define uniform preordered space We define the semi-uniform structure and the uniform preordered space. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict awaiting-author 94/0 Mathlib.lean,Mathlib/Topology/UniformSpace/UniformOrder.lean,docs/references.bib 3 2 ['shuxuezhuyi'] nobody
318-30506
10 months ago
318-30506
10 months ago
10-33091
10 days
17623 FR-vdash-bot
author:FR-vdash-bot
feat(Algebra/Order/GroupWithZero/Unbundled): add some lemmas Some lemmas in `Algebra.Order.GroupWithZero.Unbundled` have incorrect or unsatisfactory names, or assumptions that can be omitted using `ZeroLEOneClass`. The lemmas added in this PR are versions of existing lemmas that use the correct or better name or `ZeroLEOneClass` to omit an assumption. The original lemmas will be deprecated in #17593. | New name | Old name | |-------------------------|-------------------------| | `mul_le_one_left₀` | `Left.mul_le_one_of_le_of_le` | | `mul_lt_one_of_le_of_lt_left₀` (`0 ≤ ·` version) / `mul_lt_one_of_le_of_lt_of_pos_left` | `Left.mul_lt_of_le_of_lt_one_of_pos` | | `mul_lt_one_of_lt_of_le_left₀` | `Left.mul_lt_of_lt_of_le_one_of_nonneg` | | `mul_le_one_right₀` | `Right.mul_le_one_of_le_of_le` | | `mul_lt_one_of_lt_of_le_right₀` (`0 ≤ ·` version) / `mul_lt_one_of_lt_of_le_of_pos_right` | `Right.mul_lt_one_of_lt_of_le_of_pos` | | `mul_lt_one_of_le_of_lt_right₀` | `Right.mul_lt_one_of_le_of_lt_of_nonneg` | The following lemmas use `ZeroLEOneClass`. | New name | Old name | |-------------------------|-------------------------| | `(Left.)one_le_mul₀` | `Left.one_le_mul_of_le_of_le` | | `Left.one_lt_mul_of_le_of_lt₀` | `Left.one_lt_mul_of_le_of_lt_of_pos` | | `Left.one_lt_mul_of_lt_of_le₀` | `Left.lt_mul_of_lt_of_one_le_of_nonneg` / `one_lt_mul_of_lt_of_le` (still there) | | `(Left.)one_lt_mul₀` | | | `Right.one_le_mul₀` | `Right.one_le_mul_of_le_of_le` | | `Right.one_lt_mul_of_lt_of_le₀` | `Right.one_lt_mul_of_lt_of_le_of_pos` | | `Right.one_lt_mul_of_le_of_lt₀` | `Right.one_lt_mul_of_le_of_lt_of_nonneg` / `one_lt_mul_of_le_of_lt` (still there) / `one_lt_mul` (still there) | | `Right.one_lt_mul₀` | `Right.one_lt_mul_of_lt_of_lt` | --- Split from #17593. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-order t-algebra merge-conflict
label:t-algebra$
146/44 Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean 2 11 ['FR-vdash-bot', 'YaelDillies', 'github-actions', 'j-loreaux'] nobody
317-53848
10 months ago
317-53848
10 months ago
33-64877
33 days
18969 alreadydone
author:alreadydone
chore: generalize Module to NonUnitalSemiring --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict WIP
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
315-77500
10 months ago
315-77500
10 months ago
0-0
0 seconds
16361 vihdzp
author:vihdzp
chore(SetTheory/Ordinal/FixedPointApproximants): golf + better variable management We avoid making `f : α →o α` and `x : α` explicit arguments when not needed. We then golf most theorems in the file. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory t-logic merge-conflict awaiting-author 68/101 Mathlib/SetTheory/Ordinal/FixedPointApproximants.lean 1 8 ['PhoenixIra', 'YaelDillies', 'github-actions'] nobody
314-73242
10 months ago
314-73242
10 months ago
50-29942
50 days
17513 FR-vdash-bot
author:FR-vdash-bot
perf: do not search algebraic hierarchies when using `map_*` lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-bench t-algebra merge-conflict WIP
label:t-algebra$
5/3 Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/GroupTheory/GroupAction/Hom.lean 2 10 ['FR-vdash-bot', 'github-actions', 'grunweg', 'leanprover-bot'] nobody
312-50042
10 months ago
312-50042
10 months ago
4-72589
4 days
19212 Julian
author:Julian
feat(LinearAlgebra): add a variable_alias for VectorSpace Taken directly from the variable_alias docs. Zulip: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/why.20.5Bvariable_alias.5D.20attribute.20is.20not.20used.20in.20Mathlib.3F --- This is the first actual variable alias added to mathlib. I haven't reviewed variable_alias fully, but it seems like there's at least 3 ways they could be distributed in Mathlib: * alongside whatever subfolder they "belong to" (which is what I've tentatively done here) * In a file called `Aliases` somewhere near the thing they alias (which seems less discoverable to me) * In a single file, a la `Mathlib.TrainingWheels` (with some less playful name) which is meant to define a bunch of more "friendly" aliases all in one place. I kind of like the idea of the third thing as a future module but perhaps it can be synthesized if/when there are more aliases? For now as I say I've done the first one, but please let me know if someone prefers something else. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
25/0 Mathlib.lean,Mathlib/LinearAlgebra/VectorSpace.lean,scripts/noshake.json 3 10 ['Julian', 'PieterCuijpers', 'github-actions', 'urkud'] nobody
311-55287
10 months ago
311-55287
10 months ago
7-68492
7 days
19337 zeramorphic
author:zeramorphic
feat(Data/Finsupp): generalise `Finsupp` to any "zero" value Remove the explicit dependence of `Finsupp` on `[Zero M]`, instead defining `Finsupp'` (better name pending) to be functions that are equal to a fixed value `z : M` cofinitely often. This PR is intended to do the initial work of replacing the definition of `Finsupp` with an instantiation of the more general definition, without adding any appropriate API. If accepted, the API development will follow in later PRs. Issues to consider: - Naming of `Finsupp'.` - Where should `Finsupp'` lemmas go? Do they need their own file/folder under `Data/`? Relevant Zulip threads: - https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Finsupp.20generalisations - https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Finsupp-like.20partial.20function Comments are welcome. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 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
309-31364
10 months ago
309-31364
10 months ago
4-60621
4 days
19420 vihdzp
author:vihdzp
feat: AM-HM inequality We prove the weighted and unweighted AM-HM inequalities in linearly ordered semifields. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author WIP
label:t-algebra$
36/2 Mathlib/Algebra/Order/BigOperators/Ring/Finset.lean,Mathlib/Analysis/MeanInequalities.lean 2 7 ['YaelDillies', 'github-actions', 'vihdzp'] nobody
306-364
10 months ago
306-364
10 months ago
0-46682
12 hours
10332 adri326
author:adri326
feat(Topology/Sets): define regular open sets and their boolean algebra Introduces a new module, `Mathlib.Topology.Sets.RegularOpens`, which defines the `IsRegularOpen s` predicate (`interior (closure s) = s`) and `TopologicalSpace.RegularOpens`, the type of bundled regular open sets (defined as `Heyting.Regular (Opens X)`). A few properties of regular open sets (bundled and unbundled) and `interior (closure s)` are proven, and a pointwise instance of `MulAction` is provided for regular open sets. --- This PR belongs to my series of PRs around my formalization of Rubin's theorem. There are two possible ways to implement `RegularOpens`: - either construct them by hand and show that they form a boolean algebra (better def-eq but more boilerplate code required) - or use `Heyting.Regular` on the heyting algebra of `Opens` inherited from the `Frame` instance on them I first chose to use the former approach, but using the latter cuts the length of the construction of the boolean algebra of regular open sets by 100 lines of code, and allows us to inherit all of the helper lemmas defined for `Heyting.Regular`. The big downside, though, is that an element of `RegularOpens` isn't defined as a bundled regular open set anymore, but rather as an `Opens` set `s` for which `Opens.interior ↑(Opens.interior ↑sᶜ)ᶜ = s`, so I added an alternative constructor `RegularOpens.of` that instead accepts any set `s` for which `IsRegularOpen s` holds. Another minor downside is that coercion to a set takes two coercions instead of one. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict WIP 434/0 Mathlib.lean,Mathlib/Data/Set/Pointwise/SMul.lean,Mathlib/Topology/Sets/Opens.lean,Mathlib/Topology/Sets/RegularOpens.lean,docs/references.bib 5 1 ['adri326'] YaelDillies
assignee:YaelDillies
305-58711
10 months ago
414-57901
1 year ago
0-0
0 seconds
14501 jjaassoonn
author:jjaassoonn
feat: module structure of filtered colimit of abelian groups over filtered colimit of rings This helps defining the module structure of stalks This contribution was inspired by the AIM workshop "Formalizing algebraic geometry" in June 2024. --- - [x] depends on: #15315 [I am going to move the result in the new file] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) workshop-AIM-AG-2024 t-algebra t-category-theory merge-conflict awaiting-author
label:t-algebra$
439/2 Mathlib/CategoryTheory/Limits/ConcreteCategory/Basic.lean,Mathlib/CategoryTheory/Limits/ConcreteCategory/WithAlgebraicStructures.lean 2 48 ['YaelDillies', 'adamtopaz', 'erdOne', 'github-actions', 'jjaassoonn', 'joelriou', 'kbuzzard', 'leanprover-community-mathlib4-bot'] joelriou
assignee:joelriou
302-62369
9 months ago
302-62369
9 months ago
64-29952
64 days
18756 astrainfinita
author:astrainfinita
refactor: deprecate `DistribMulActionSemiHomClass` `MulSemiringActionSemiHomClass` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
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
297-83433
9 months ago
297-83433
9 months ago
31-75259
31 days
17071 ScottCarnahan
author:ScottCarnahan
feat : (LinearAlgebra/RootSystem) : Separation, base, cartanMatrix This PR defines an abstract separation structure for roots, together with the associated base and Cartan Matrix. In general, the good properties will follow from additional order hypotheses on the base ring (implemented in a future PR). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict WIP
label:t-algebra$
111/0 Mathlib.lean,Mathlib/LinearAlgebra/RootSystem/Separation.lean 2 1 ['github-actions'] nobody
297-73334
9 months ago
297-73334
9 months ago
20-56416
20 days
19125 yhtq
author:yhtq
feat: add theorems to transfer `IsGalois` between pairs of fraction rings feat: add theorems to transfer `IsGalois` between pairs of fraction rings. - [x] depends on: #18404 - [x] depends on: #19124 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra merge-conflict
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
295-9502
9 months ago
301-44925
9 months ago
0-4534
1 hour
18841 hrmacbeth
author:hrmacbeth
chore: change some `linarith`s to `linear_combination`s Change 100 `linarith`s to `linear_combination`s; this is generally a slight speedup. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #18714 (not strictly blocked by this, but the speed comparison will be more informative after it) merge-conflict WIP 106/107 Archive/Imo/Imo1959Q2.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2013Q5.lean,Archive/Imo/Imo2021Q1.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Complex/AbelLimit.lean,Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Convex/Slope.lean,Mathlib/Analysis/Convex/SpecificFunctions/Basic.lean,Mathlib/Analysis/Convex/Uniform.lean,Mathlib/Analysis/Convex/Visible.lean,Mathlib/Analysis/FunctionalSpaces/SobolevInequality.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/PSeries.lean,Mathlib/Analysis/SpecialFunctions/Gamma/BohrMollerup.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/Log/Monotone.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Analysis/SpecificLimits/FloorPow.lean,Mathlib/MeasureTheory/Covering/BesicovitchVectorSpace.lean,Mathlib/MeasureTheory/Measure/Lebesgue/VolumeOfBalls.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/NumberTheory/Transcendental/Liouville/LiouvilleWith.lean,Mathlib/Probability/Distributions/Pareto.lean 30 29 ['github-actions', 'grunweg', 'hrmacbeth', 'jcommelin', 'leanprover-bot', 'mathlib4-dependent-issues-bot'] nobody
293-56828
9 months ago
293-56828
9 months ago
3-30853
3 days
18748 FR-vdash-bot
author:FR-vdash-bot
refactor: deprecate `ContinuousLinearMapClass` --- - [ ] depends on: #18689 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology merge-conflict
label:t-algebra$
115/49 Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/LocallyConvex/WeakOperatorTopology.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Operator/LinearIsometry.lean,Mathlib/Topology/Algebra/Module/Basic.lean,Mathlib/Topology/Algebra/Module/CharacterSpace.lean,Mathlib/Topology/Algebra/Module/FiniteDimension.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,Mathlib/Topology/Homeomorph.lean 10 5 ['FR-vdash-bot', 'github-actions', 'leanprover-bot', 'mathlib4-dependent-issues-bot'] nobody
291-47446
9 months ago
291-47449
9 months ago
0-989
16 minutes
8686 j-loreaux
author:j-loreaux
refactor: allow non-unital `AlgEquiv` This refactors `AlgEquiv` (and `AlgEquivClass`) to incorporate a `map_smul` field instead of `commutes`. This allows us to weaken the type class assumptions on `AlgEquiv` from: ```lean structure AlgEquiv (R A B : Type*) [CommSemiring R] [Semiring A] [Semiring B] [Algebra R A] [Algebra R B] ``` to: ```lean structure AlgEquiv (R A B : Type*) [Add A] [Add B] [Mul A] [Mul B] [SMul R A] [SMul R B] ``` in accordance with the other `Equiv` structures (e.g., `MulEquiv`, `AddEquiv`, `RingEquiv`). This allows us to use `AlgEquiv` for both unital and non-unital (even non-associative) algebra homomorphisms. Note in addition that `StarAlgEquiv` already follows this paradigm. We supply the convenience constructor `AlgEquiv.ofCommutes`, which is marked `inline` and `reducible`, so that users can still provide go via the `commutes` route for constructing and `AlgEquiv` whenever it is more convenient. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict WIP
label:t-algebra$
286/227 Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Opposite.lean,Mathlib/Algebra/Algebra/Pi.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Category/AlgebraCat/Basic.lean,Mathlib/Algebra/DualQuaternion.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/ToDirectSum.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Star/Free.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Analysis/NormedSpace/LpEquiv.lean,Mathlib/Data/Complex/Module.lean,Mathlib/Data/IsROrC/Basic.lean,Mathlib/Data/Matrix/Basic.lean,Mathlib/Data/Matrix/DualNumber.lean,Mathlib/Data/MvPolynomial/Equiv.lean,Mathlib/Data/MvPolynomial/Rename.lean,Mathlib/Data/Polynomial/AlgebraMap.lean,Mathlib/LinearAlgebra/Matrix/Basis.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Coeff.lean,Mathlib/LinearAlgebra/Matrix/Reindex.lean,Mathlib/LinearAlgebra/Matrix/ToLin.lean,Mathlib/LinearAlgebra/TensorProduct/Opposite.lean,Mathlib/Logic/Equiv/TransferInstance.lean,Mathlib/RingTheory/FinitePresentation.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/Ideal/QuotientOperations.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/MatrixAlgebra.lean,Mathlib/RingTheory/Polynomial/Quotient.lean,Mathlib/RingTheory/PolynomialAlgebra.lean,Mathlib/RingTheory/TensorProduct.lean,Mathlib/Topology/LocallyConstant/Algebra.lean 35 2 ['eric-wieser', 'j-loreaux'] nobody
288-59241
9 months ago
668-22018
1 year ago
0-0
0 seconds
11142 hmonroe
author:hmonroe
feat(ProofTheory): Define logical symbols abstractly; opens new top-level section, drawing from lean4-logic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic merge-conflict awaiting-author 468/1 Mathlib.lean,Mathlib/Data/Fin/VecNotation.lean,Mathlib/ProofTheory/LogicSymbol.lean 3 19 ['PatrickMassot', 'YaelDillies', 'avigad', 'fpvandoorn', 'github-actions'] nobody
287-66648
9 months ago
287-66648
9 months ago
92-18232
92 days
11210 hmonroe
author:hmonroe
Test commit --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 1950/1 Mathlib.lean,Mathlib/Data/Fin/VecNotation.lean,Mathlib/ProofTheory/Calculus.lean,Mathlib/ProofTheory/FirstOrder/Arith/Language.lean,Mathlib/ProofTheory/FirstOrder/Basic/Syntax/Term.lean,Mathlib/ProofTheory/LogicSymbol.lean,Mathlib/ProofTheory/Matrix.lean,Mathlib/ProofTheory/Semantics.lean,Mathlib/ProofTheory/System.lean,docs/references.bib 10 100 ['github-actions'] nobody
287-66647
9 months ago
287-66647
9 months ago
0-0
0 seconds
18294 FR-vdash-bot
author:FR-vdash-bot
perf: make `Mul.toSMul` higher priority --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-bench t-algebra merge-conflict
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 ['FR-vdash-bot', 'github-actions', 'leanprover-bot'] nobody
282-47840
9 months ago
282-47841
9 months ago
0-0
0 seconds
19699 vihdzp
author:vihdzp
chore(SetTheory/Cardinal/Basic): tweak `#α = 0`, `#α = 1`, etc. lemmas We rename `le_one_iff_subsingleton` → `mk_le_one_iff` and `mk_le_one_iff_set_subsingleton` → `mk_set_le_one_iff` to match the names of other lemmas in this section. We also add `mk_eq_one_iff` and `mk_set_eq_one_iff`. --- These last two lemmas can probably be golfed somehow. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory awaiting-CI merge-conflict 48/16 Mathlib/SetTheory/Cardinal/Basic.lean 1 1 ['github-actions'] nobody
280-53274
9 months ago
280-53274
9 months ago
0-5976
1 hour
15773 kkytola
author:kkytola
feat: Add type class for ENat-valued floor functions This PR adds a type class for extended natural number -valued floor functions. This is split off from #15269, where the suggestions were to make the floor function on ENNReal ENat-valued and to have an API mimicling FloorSemirings. Besides ENNReal, at least ENNRat would naturally satisfy the general type class. --- Two things are worth noting: * To fully mimic `FloorSemiring` API, also ceiling functions need to be added. The plan is to do that in a later PR. * The PR introduces the class `CastNatENatClass` to ensure that `natCast` and a coercion from `ENat` behave in the natural and order-respecing manner. This feels a little ad hoc, but such assumptions are needed for general `ENat`-valued floor functions to behave well. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict awaiting-author 231/0 Mathlib.lean,Mathlib/Algebra/Order/EFloor.lean,Mathlib/Data/ENat/Basic.lean 3 5 ['YaelDillies', 'github-actions', 'kkytola', 'urkud'] nobody
274-21014
9 months ago
274-21014
9 months ago
66-24436
66 days
3251 kmill
author:kmill
feat: deriving `LinearOrder` for simple enough inductive types Uses the same machinery underlying the `Fintype` derive handler to derive a lexicographical `LinearOrder` for non-recursive inductive types that have no indices. In principle more complicated types can have `LinearOrder`s, but that would require a more sophisticated implementation. --- - [x] depends on: #3198 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict awaiting-author WIP 82/0 Mathlib.lean,Mathlib/Tactic/DeriveLinearOrder.lean 2 5 ['ChrisHughes24', 'kim-em', 'kmill', 'vihdzp'] nobody
271-82067
8 months ago
271-82067
8 months ago
1-80342
1 day
3610 TimothyGu
author:TimothyGu
feat: derive Infinite automatically for inductive types Deals with recursive types, but not mutually recursive types or types with indices right now. See docstring for details. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict awaiting-author 517/0 Mathlib.lean,Mathlib/Tactic/DeriveInfinite.lean,test/DeriveInfinite.lean 3 11 ['TimothyGu', 'digama0', 'eric-wieser', 'grunweg', 'kim-em', 'kmill'] kmill
assignee:kmill
271-82066
8 months ago
271-82066
8 months ago
8-36622
8 days
16120 awainverse
author:awainverse
feat(ModelTheory/Algebra/Ring/Basic): Ring homomorphisms are a `StrongHomClass` for the language of rings Adds an `IsAlgebraic` instance to the language of rings Adds a `StrongHomClass` instance to the type of ring homomorphisms between rings with `CompatibleRing` structures --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic t-algebra RFC merge-conflict
label:t-algebra$
34/13 Mathlib/ModelTheory/Algebra/Ring/Basic.lean 1 10 ['ChrisHughes24', 'YaelDillies', 'awainverse', 'github-actions', 'jcommelin'] nobody
270-13207
8 months ago
270-13207
8 months ago
135-29017
135 days
15045 Command-Master
author:Command-Master
fix(LinearAlgebra/Alternating/Basic): fix `MultilinearMap.alternatization` See https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/kernel.20deep.20recursion.20detected. Fix ```lean import Mathlib.LinearAlgebra.Determinant example : (1 : Matrix (Fin 8) (Fin 8) ℚ).det = 1 := by rw [Matrix.det_one] ``` causing a `(kernel) deep recursion detected` error. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author
label:t-algebra$
51/21 Mathlib/Data/Nat/Factorial/SuperFactorial.lean,Mathlib/LinearAlgebra/Alternating/Basic.lean,test/DetOne.lean 3 12 ['Command-Master', 'PatrickMassot', 'eric-wieser', 'github-actions', 'grhkm21', 'grunweg', 'kbuzzard', 'kim-em'] nobody
269-66896
8 months ago
269-66897
8 months ago
0-8789
2 hours
20527 trivial1711
author:trivial1711
refactor(Topology/UniformSpace/Completion): more descriptive names for `α → Completion α` - We rename the various maps `α → Completion α` in order to make their names more consistent. - Let `α` be a uniform space. We rename the uniformly continuous function `α → Completion α` from `UniformSpace.Completion.coe'` to `UniformSpace.Completion.coe`. - Let `α` be a uniform additive group. We rename the additive group homomorphism `α →+ Completion α` from `UniformSpace.Completion.toCompl` to `UniformSpace.Completion.coeAddHom`. - Let `α` be a uniform ring. The ring homomorphism `α →+* Completion α` is called `UniformSpace.Completion.coeRingHom`; its name is unchanged. - Let `α` be a normed space over a field `𝕜`. We rename the linear isometry `α →ₗᵢ[𝕜] Completion α` from `UniformSpace.Completion.toComplₗᵢ` to `UniformSpace.Completion.coeₗᵢ`. - Let `α` be a normed space over a field `𝕜`. We rename the continuous linear map `α →L[𝕜] Completion α` from `UniformSpace.Completion.toComplL` to `UniformSpace.Completion.coeL`. - Let `α` be a normed additive group. We rename the norm preserving homomorphism `NormedAddGroupHom α (Completion α)` from `NormedAddCommGroup.toCompl` to `UniformSpace.Completion.coeNormedAddGroupHom`. - We analogously rename some other theorems. - We add some trivial theorems (all of which are proved by `rfl`) that state that the functions considered above are equal. We give all of them the `simp` and `norm_cast` attributes. - We add a new theorem `UniformSpace.Completion.coeAddHom_eq_coe` that states that `UniformSpace.Completion.coeAddHom` and `UniformSpace.Completion.coe` are equal as functions. - We similarly add a new theorem `UniformSpace.Completion.coeRingHom_eq_coe`. - We rename the theorem `UniformSpace.Completion.coe_toComplₗᵢ` to `UniformSpace.Completion.coeₗᵢ_eq_coe`. - We rename the theorem `UniformSpace.Completion.coe_toComplL` to `UniformSpace.Completion.coeL_eq_coe`. - We similarly add a new theorem `UniformSpace.Completion.coeNormedAddGroupHom_eq_coe`. - We change all occurrences of the string `((↑) : α → Completion α)` to `(coe : α → Completion α)` or just `coe`. - We put the statements of some theorems into simp normal form by using the plain function `coe` rather than the homomorphisms that carry more structure. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 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
263-44239
8 months ago
263-44239
8 months ago
6-66637
6 days
17739 Aaron1011
author:Aaron1011
feat(Topology/Order/DenselyOrdered): prove Not (IsOpen) for intervals Prove that Iic/Ici/Ioc/Ico/Icc intervals are not open in densely ordered topologies with no min/max element --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology merge-conflict awaiting-author 27/0 Mathlib/Topology/Order/DenselyOrdered.lean 1 8 ['github-actions', 'vihdzp'] nobody
261-31514
8 months ago
261-31514
8 months ago
0-4704
1 hour
18474 FR-vdash-bot
author:FR-vdash-bot
perf: lower the priority of `*WithOne.to*` instances --- From #7873. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data slow-typeclass-synthesis t-algebra merge-conflict
label:t-algebra$
9/2 Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Data/Int/Cast/Defs.lean,Mathlib/Data/Nat/Cast/Defs.lean 3 7 ['FR-vdash-bot', 'eric-wieser', 'github-actions', 'leanprover-bot'] nobody
261-31269
8 months ago
261-31269
8 months ago
76-67978
76 days
20656 Komyyy
author:Komyyy
feat(Mathlib/Geometry/Manifold/VectorBundle/Sphere): convert orthogonal smooth `M → 𝕊ⁿ` & `M → ℝⁿ⁺¹` to smooth `M → T𝕊ⁿ` Current Mathlib has no easy way to define function from a manifold to tangent bundles of sphere: `T𝕊ⁿ`. This PR gives this: `sphereTangentMap`. This convert orthogonal smooth `M → 𝕊ⁿ` & `M → ℝⁿ⁺¹` to smooth `M → T𝕊ⁿ`. I also proved that if `f : M → 𝕊ⁿ` & `g : M → ℝⁿ⁺¹` are smooth then `sphereTangentMap` of `f` & `g` is smooth too. --- ⚠ **CAUTION** I formalized this in my spare time. I don't have the energy to maintain the PR, but I create this PR so this may helps everyone. The only one thing to do is proof cleanup. TODO: - [x] `contDiff_uncurry_stereoInvFunAux` & `coe_sphere_comp_stereoInvFun` may have to be moved to `Mathlib.Geometry.Manifold.Instances.Sphere`. - [ ] Proof cleanup. Current proof may be redundant and ugly. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict please-adopt 246/6 Mathlib.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/Geometry/Manifold/VectorBundle/Sphere.lean 3 1 ['github-actions'] nobody
260-66203
8 months ago
260-66203
8 months ago
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 new-contributor t-combinatorics merge-conflict awaiting-author 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
260-50600
8 months ago
260-50600
8 months ago
9-13962
9 days
18629 tomaz1502
author:tomaz1502
feat(Computability.Timed): Formalization of runtime complexity of List.merge This PR adds the formalization of the runtime complexity of the merge function, defined in `Data/List/Sort`. Requires: https://github.com/leanprover-community/mathlib4/pull/15450 References: - Previous PR on mathlib3: https://github.com/leanprover-community/mathlib3/pull/14494/ - First discussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/BSc.20Final.20Project/near/220647062 - Second disussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Formalization.20of.20Runtime.20Complexity.20of.20Sorting.20Algorithms/near/284184450 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor merge-conflict awaiting-author 186/0 Mathlib.lean,Mathlib/Computability/Timed/InsertionSort.lean,Mathlib/Computability/Timed/Merge.lean 3 2 ['github-actions', 'trivial1711'] nobody
260-16519
8 months ago
260-16519
8 months ago
33-11262
33 days
8362 urkud
author:urkud
feat(Asymptotics): define `ReflectsGrowth` --- - [x] depends on: #8349 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict awaiting-author 268/0 Mathlib.lean,Mathlib/Analysis/Asymptotics/ReflectsGrowth.lean 2 14 ['YaelDillies', 'fpvandoorn', 'github-actions', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
258-23773
8 months ago
258-23773
8 months ago
1-41158
1 day
6692 prakol16
author:prakol16
feat: disjoint indexed union of local homeomorphisms Add disjoint indexed union of local equivs and local homeomorphisms --- This is leading up to PRing some things related to covering spaces that I wrote a long time ago in lean 3 but never submitted a PR for. Note that this was converted using mathport. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict awaiting-author 126/0 Mathlib/Logic/Equiv/PartialEquiv.lean,Mathlib/Topology/PartialHomeomorph.lean 2 4 ['alreadydone', 'github-actions', 'winstonyin'] nobody
258-8369
8 months ago
258-8369
8 months ago
117-22351
117 days
19291 PieterCuijpers
author:PieterCuijpers
feat(Algebra/Order/Hom): add quantale homomorphism Definition of quantale homomorphisms as functions that are both semigroup homomorphisms and complete lattice homomorphisms. --- - [x] depends on: #19810 - [x] depends on: #19811 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra merge-conflict awaiting-author
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
255-38178
8 months ago
255-38179
8 months ago
36-2255
36 days
19352 hrmacbeth
author:hrmacbeth
chore: change some `nlinarith`s to `linear_combination`s --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 13/13 Archive/Imo/Imo2021Q1.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Mathlib/Analysis/Normed/Group/AddCircle.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Ring/Units.lean,Mathlib/Analysis/SpecialFunctions/Complex/LogBounds.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Increment.lean,Mathlib/NumberTheory/Modular.lean 8 4 ['github-actions', 'hrmacbeth', 'leanprover-bot'] nobody
253-67389
8 months ago
253-67389
8 months ago
0-8636
2 hours
20372 jvlmdr
author:jvlmdr
feat(MeasureTheory/Function): Add ContinuousLinearMap.bilinearCompLp(L) Introduce ContinuousLinearMap.bilinearCompLp and bilinearCompLpL. Generalize eLpNorm_le_eLpNorm_mul_eLpNorm theorems to include constant C in bound condition. --- Expect this may be useful for defining tempered distributions from functions in `L^p`. The definitions more or less follow `ContinuousLinearMap.compLp...`. Names are loosely analogous to `ContinuousLinearMap.bilinearComp` and `SchwartzMap.bilinLeftCLM`. Note: I preferred the spelling `hpqr : p⁻¹ + q⁻¹ = r⁻¹` with `f` in `L^p` and `g` in `L^q` to `hpqr : 1 / p = 1 / q + 1 / r`. It's easier to obtain from `ENNReal.IsConjExponent` too. A few questions: - [ ] I defined `bilinear{Left,Right}LpL` in addition to `bilinearCompLpL` because `LinearMap.mkContinuous₂` is marked as `noncomputable` and `LinearMap.mkContinuous` is not. Is this worth the extra definitions? (Note: This is not visible in the source due to `noncomputable section`.) - [ ] Should I use `C : ℝ` instead of `C : NNReal` for `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'`? - [ ] Is it going to be painful to have `[Fact (1 ≤ p)] [Fact (1 ≤ q)] [Fact (1 ≤ r)]`? I don't think there's a way to avoid it though. Maybe providing specialized versions for `p.IsConjExponent q` with `L^1`? Naming: - [ ] Is it satisfactory to add a `'` to the `eLpNorm_le_eLpNorm_mul_eLpNorm ` definitions in `CompareExp.lean` where `≤ ‖f x‖ * ‖g x‖` has been replaced with `≤ C * ‖f x‖ * ‖g x‖`? These could replace the existing theorems, although I don't want to break backwards compatibility. There are 5 instances: `eLpNorm_le_eLpNorm_top_mul_eLpNorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm_top'`, `eLpNorm'_le_eLpNorm'_mul_eLpNorm''`, `eLpNorm_le_eLpNorm_mul_eLpNorm_of_nnnorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'` (I'm not sure why the existing theorem `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm` has an internal `'`) - [ ] Is `bilinearLeftLpL` a suitable name? Other options: `bilinearCompLpLeftL`, `bilinearCompLeftLpL`, `bilinLeftLpL` (analogous to `SchwartzMap.bilinLeftCLM`) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability merge-conflict 203/40 Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSpace.lean 2 1 ['github-actions'] nobody
248-55526
8 months ago
248-55526
8 months ago
27-43617
27 days
17176 arulandu
author:arulandu
feat: integrals and integrability with .re Lemmas for swapping order of .re and integration/integrability. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability merge-conflict awaiting-author 49/0 Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean 4 30 ['EtienneC30', 'arulandu', 'github-actions', 'loefflerd'] nobody
247-29959
8 months ago
247-29959
8 months ago
9-73631
9 days
20872 grunweg
author:grunweg
feat: lint against the tactic.skipAssignedInstances option in mathlib This means we can remove the corresponding technical debt entry. We also correct some outdated details in the Linter/Style.lean docstring. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt t-linter merge-conflict awaiting-author 63/7 Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Topology/Separation/Regular.lean,MathlibTest/LintStyle.lean,scripts/technical-debt-metrics.sh 5 17 ['adomani', 'github-actions', 'grunweg'] nobody
247-23989
8 months ago
247-23989
8 months ago
0-9411
2 hours
2605 eric-wieser
author:eric-wieser
chore: better error message in linarith On this mwe: ```lean import Mathlib.Tactic.Linarith example (s : Set ℕ) (h : s = s) : 0 ≤ 1 := by linarith ``` this now indicates where the internal error is coming from. Is there a better way of chaining errors than this? --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict awaiting-author 12/1 Mathlib/Tactic/Linarith/Preprocessing.lean 1 3 ['Vierkantor', 'harahu', 'kim-em', 'mo271'] nobody
246-46119
8 months ago
681-19406
1 year ago
4-7271
4 days
11837 trivial1711
author:trivial1711
feat: completion of a uniform multiplicative group Multiplicativize `Topology.Algebra.GroupCompletion`. That is, rewrite it in the multiplicative setting and recover the original results using `@[to_additive]`. - Because `@[to_additive]` doesn't work with `noncomputable section` (https://github.com/leanprover/lean4/pull/2610), some instances with `@[to_additive]` need to be explicitly marked with `noncomputable instance`. - One might be tempted to multiplicativize this definition from `Topology.Algebra.GroupCompletion`: ```lean instance [UniformSpace α] [Add α] : Add (Completion α) := ⟨Completion.map₂ (· + ·)⟩ ``` to this: ```lean @[to_additive] instance [UniformSpace α] [Mul α] : Mul (Completion α) := ⟨Completion.map₂ (· * ·)⟩ ``` However, as Eric Wieser pointed out, doing so would create a bad diamond with the definition ```lean instance [UniformSpace α] [TopologicalRing α] [UniformAddGroup α] [Ring α] : Mul (Completion α) := ⟨curry <| (denseInducing_coe.prod denseInducing_coe).extend ((↑) ∘ uncurry (· * ·))⟩ ``` in `Topology.Algebra.UniformRing`. How should this diamond be resolved? Well, the definition of multiplication that uses `curry <| (denseInducing_coe.prod denseInducing_coe).extend ((↑) ∘ uncurry (· * ·))` is the "correct" one. For example, it yields the correct result if `α` is `ℚ`, unlike the definition that uses `Completion.map₂ (· * ·)`. (This is because `Completion.map₂` yields junk values if used on a function which is not uniformly continuous. Note, however, that if multiplication on `α` *is* uniformly continuous, then `Completion.map₂ (· * ·)` and `curry <| (denseInducing_coe.prod denseInducing_coe).extend ((↑) ∘ uncurry (· * ·))` are propositionally equal.) So, following Eric's suggestion, we remove the definition that uses `Completion.map₂ (· * ·)`, and generalize the other definition to any uniform space with a multiplication operation: ```lean @[to_additive] noncomputable instance [UniformSpace α] [Mul α] : Mul (Completion α) := ⟨curry <| (denseInducing_coe.prod denseInducing_coe).extend ((↑) ∘ uncurry (· * ·))⟩ ``` This requires slightly modifying some of the proofs in `Topology.Algebra.GroupCompletion`. For example, suppose that `α` is a uniform group. Since we can no longer use `Completion.continuous_map₂`, it becomes more efficient to prove that the multiplication, inversion, and division operations on `Completion α` are uniformly continuous *before* we prove that `Completion α` is a group. - Previously, `Topology.Algebra.GroupCompletion` had an instance: ```lean instance [UniformSpace α] [Sub α] : Sub (Completion α) := ... ``` Naively multiplicativizing this would yield ```lean @[to_additive] instance [UniformSpace α] [Inv α] : Inv (Completion α) := ... ``` Unfortunately, this would conflict with `Topology.Algebra.UniformField`, which already instantiates `Inv (Completion α)` when `α` is a uniform field. Instead, we use two different `instance` declarations. (If `α` is an additive group, then this instantiates `Neg (Completion α)` twice, and the instances are syntactically equal.) ```lean @[to_additive] noncomputable instance [UniformSpace α] [Group α] : Inv (Completion α) := ... instance [UniformSpace α] [Neg α] : Neg (Completion α) := ... ``` This avoids the bad diamond (because a uniform field can never be a `Group`) while remaining backward compatible. Note that the `@[to_additive]` is necessary here, because it maintains the link between the additive setting and multiplicative setting. We use a similar method to instantiate `Div (Completion α)`. - Some definitions in this file involve a module structure on `α`. We leave these as is and do not attempt to multiplicativize them at all. - The instance of `DistribMulAction` must be multiplicativized to an instance of `MulDistribMulAction` manually. Zulip thread: https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Completion.20of.20a.20uniform.20multiplicative.20group --- # (Small) Issue Recall the following trick that this pull request uses to define inversion and negation on uniform spaces. The idea is that we define negation on the completion of any uniform space that has a negation operation, but we define inversion on only the completion of a uniform space that has the structure of a multiplicative group. We do this to avoid creating a bad diamond with the inversion operation on a uniform field. ```lean @[to_additive] noncomputable instance {α : Type*} [UniformSpace α] [Group α] : Inv (Completion α) := ... instance {α : Type*} [UniformSpace α] [Neg α] : Neg (Completion α) := ... ``` Now, suppose that we want to prove `coe_inv_of_group` (resp. `coe_neg`), which states that the coercion `α → Completion α` commutes with inversion (resp. negation). In the current version of this pull request, `coe_inv_of_group` (resp. `coe_neg`) only applies to uniform multiplicative (resp. additive) groups. However, we do not use the fact that multiplication (resp. addition) on `α` is uniformly continuous to prove it. We only use the fact that inversion (resp. negation) is continuous. So, what we really want is to have more general statements that look like this: ```lean theorem coe_inv_of_group {α : Type*} [UniformSpace α] [Group α] [ContinuousInv α] : ... theorem coe_neg {α : Type*} [UniformSpace α] [Neg α] [ContinuousNeg α] : ... ``` Note that `coe_inv_of_group` needs the assumption `[Group α]`, because otherwise inversion is not defined on `Completion α` at all. However, `coe_neg` does not need the analogous assumption `[AdditiveGroup α]`. The question is: If `coe_inv_of_group` and `coe_neg` are written in this more general form, how can we link them using `@[to_additive]`? Here is one option, but it obviously leaves something to be desired. ```lean @[to_additive coe_neg_do_not_use_this_use_the_more_general_version] theorem coe_inv_of_group {α : Type*} [UniformSpace α] [Group α] [ContinuousInv α] : ... theorem coe_neg {α : Type*} [UniformSpace α] [Neg α] [ContinuousNeg α] : ... ``` Co-authored-by: Eric Wieser --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology merge-conflict WIP help-wanted
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
246-23624
8 months ago
246-23624
8 months ago
101-64856
101 days
14686 smorel394
author:smorel394
feat (AlgebraicGeometry/Grassmannian): define the Grassmannian scheme # The Grassmannian scheme Define the Grassmannian scheme by gluing affine charts. We fix a commutative ring `K`, a free `K`-module of finite type `V` and two natural numbers `r` and `c`. The scheme we define should parametrize surjective `K`-linear maps `V →ₗ[K] (Fin r → K)`, assuming that `V` is of rank `r + c`. We actually define the scheme without assuming the condition on the rank of `V`, but it is empty unless the rank of `V` is `r + c`. Main definitions: * `Grassmannian.glueData K V r c`: the `AlgebraicGeometry.Scheme.GlueData` defining the Grassmannian scheme. * `Grassmannian K V r c`: the Grassmannian scheme, defined as `(Grassmannian.glueData K V r c).glued`. * `Grassmannian.structMorphism K V r c`: the structural morphism from `Grassmannian K V r c` to `Spec K`. # Implementation We use as index type for the charts the type `Basis (Fin (r + c)) K V` (so this is empty unless `V` is free of rank `r + c`). All the charts are the same and equal to the affine space with coordinates indexed by `Fin c × Fin r`, that is, to `Spec (MvPolynomial (Fin c × Fin r) K)`. The idea is that, for `i` in `Basis (Fin (r + c)) K V`, the corresponding chart will parametrize all surjective `K`-linear maps `φ : V →ₗ[K] (Fin r → K)` that become isomorphisms when restricted to the `K`-submodule generated by the first `r` vectors of the basis `i`. To get the point of the chart corresponding to `φ`, we take the matrix of `φ` in the basis `i` of `V` and the canonical basis of `Fin r → K`, we divide it on the right by its top `r × r` square submatrix (which is invertible by assumption), and we taken the botton `c × r` submatrix. This is almost the usual description of the Grassmannian by charts, with three differences: * We consider the Grassmannian parametrizing `r`-dimensional quotients of `V` instead of `r`-dimensional subspaces of `V`, because this is more natural when working over a general ring (or scheme). * In the usual description, we fix a basis of `V` and index the chart by its subsets `I` of cardinality `r`. Here, to avoid making a choice, we instead index charts by the set of bases of `V` and always choose the subset `I` to consist of the first `r` vectors. * Instead of working with `FiniteDimensional.finrank K V - r`, which would cause technical trouble because of the way subtraction works on `ℕ`, we introduce the codimension `c` as an auxiliary variable, and our constructions are only interesting when `r + c` is equal to `FiniteDimensional.finrank K V`. # Why is this a WIP * There a bunch of lemmas in the file `AlgebraicGeometry/Grassmannian/Lemmas.lean` that either should not be necessary or should be put in another PR for some other part of mathlib. * The proofs in `AlgebraicGeometry/Grassmannian/Basic.lean` are probably too complicated, and the names suck. # Notes. This contribution was created as part of the AIM workshop "Formalizing algebraic geometry" in June 2024. --- - [x] depends on: #14711 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) workshop-AIM-AG-2024 t-algebraic-geometry merge-conflict please-adopt WIP 1002/0 Mathlib.lean,Mathlib/AlgebraicGeometry/Grassmannian/Basic.lean,Mathlib/AlgebraicGeometry/Grassmannian/Lemmas.lean 3 15 ['erdOne', 'github-actions', 'joelriou', 'leanprover-community-mathlib4-bot', 'smorel394'] nobody
241-70450
7 months ago
241-70450
7 months ago
0-201
3 minutes
9449 hmonroe
author:hmonroe
feat: Add Turing machine with the quintet definition (TMQ) and a chainable step function for each TM type --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability merge-conflict awaiting-author 458/1 Mathlib/Computability/TuringMachine.lean,Mathlib/Logic/PartArith.lean 2 8 ['eric-wieser', 'github-actions', 'hmonroe'] nobody
240-74703
7 months ago
240-74703
7 months ago
14-19968
14 days
18719 FR-vdash-bot
author:FR-vdash-bot
perf: lower the priority of `SemilinearMapClass.toAddHomClass` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-bench slow-typeclass-synthesis t-algebra merge-conflict
label:t-algebra$
14/7 Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unique.lean,MathlibTest/TCSynth.lean 3 4 ['FR-vdash-bot', 'github-actions', 'leanprover-bot'] nobody
239-49520
7 months ago
239-49520
7 months ago
0-0
0 seconds
20663 EtienneC30
author:EtienneC30
feat: `PFunLike` typeclass for partial homomorphisms and `LinearPMapClass` A test PR implementing a typeclass `PFunLike` to represent partial homomorphisms and building a `LinearPMapClass` typeclass. Started from [this](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/ContinuousLinearPMap) discussion. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data t-algebra merge-conflict WIP
label:t-algebra$
278/49 Mathlib.lean,Mathlib/Algebra/Group/PHom.lean,Mathlib/Algebra/Module/Injective.lean,Mathlib/Analysis/Convex/Cone/Extension.lean,Mathlib/Data/PFunLike.lean,Mathlib/GroupTheory/GroupAction/PHom.lean,Mathlib/LinearAlgebra/LinearPMap.lean 7 1 ['github-actions'] nobody
238-41968
7 months ago
238-41968
7 months ago
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 ``` --- - [x] depends on: #20360 This is in preparation for reworking `finSigmaFinEquiv` and `finProdFinEquiv` in #19013. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict awaiting-author 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
238-30721
7 months ago
238-30721
7 months ago
6-25961
6 days
19353 hrmacbeth
author:hrmacbeth
chore: golf some term/rw proofs using `linear_combination` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 47/102 Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Mathlib/Analysis/Convex/Slope.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/MeasureTheory/Integral/RieszMarkovKakutani.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/NumberTheory/Zsqrtd/Basic.lean,Mathlib/Topology/ContinuousMap/ZeroAtInfty.lean 7 5 ['github-actions', 'grunweg', 'hrmacbeth', 'leanprover-bot'] grunweg
assignee:grunweg
237-29842
7 months ago
237-29842
7 months ago
0-7781
2 hours
21196 vihdzp
author:vihdzp
chore: make argument of `zero_le` implicit This simplifies our expressions probably 95% of the time, and the remaining 5% we can simply use the Lean 4 implicit argument notation. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-CI merge-conflict 10/10 Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean 1 1 ['github-actions'] nobody
237-5964
7 months ago
237-5964
7 months ago
0-0
0 seconds
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
235-48727
7 months ago
236-37090
7 months ago*
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
235-48726
7 months ago
236-37046
7 months ago*
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
235-48725
7 months ago
236-36927
7 months ago*
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. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict awaiting-author 332/0 Mathlib.lean,Mathlib/Topology/UniformSpace/Basic.lean,Mathlib/Topology/UniformSpace/CompletelyRegular.lean 3 6 ['ADedecker', 'adri326'] ADedecker
assignee:ADedecker
235-24253
7 months ago
235-24253
7 months ago
17-44773
17 days
20030 vihdzp
author:vihdzp
refactor: avoid ordinals in Nöbeling's theorem --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict WIP help-wanted 356/428 Mathlib/Topology/Category/Profinite/Nobeling.lean 1 1 ['github-actions'] nobody
233-80238
7 months ago
233-80238
7 months ago
0-0
0 seconds
18785 erdOne
author:erdOne
feat(CategoryTheory): command that generates instances for `MorphismProperty` Co-authored-by: Calle Sönne --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory t-meta merge-conflict awaiting-author 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
233-40763
7 months ago
233-40763
7 months ago
52-4682
52 days
15942 grunweg
author:grunweg
chore: move style linters into their own file; document all current linters Just to show the overall direction: this PR is just a tracking PR; it is easier to re-do the remaining pieces individually. - [x] depends on: #19529 (and needs a merge afterwards) --- The documenting of items should move into Tactic.Linter... [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict awaiting-author 634/287 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/BinaryEntropy.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Init.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/AdmitLinter.lean,Mathlib/Tactic/Linter/GlobalAttributeIn.lean,Mathlib/Tactic/Linter/HashCommandLinter.lean,Mathlib/Tactic/Linter/HaveLetLinter.lean,Mathlib/Tactic/Linter/Lint.lean,Mathlib/Tactic/Linter/OldObtain.lean,Mathlib/Tactic/Linter/RefineLinter.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,Mathlib/Util/SleepHeartbeats.lean,lakefile.lean,test/AdmitLinter.lean,test/Change.lean,test/Check.lean,test/Clear!.lean,test/ClearExcept.lean,test/Clear_.lean,test/DefEqTransformations.lean,test/DeriveToExpr.lean,test/ExtractGoal.lean,test/ExtractLets.lean,test/GuardGoalNums.lean,test/GuardHypNums.lean,test/HashCommandLinter.lean,test/Lint.lean,test/LintStyle.lean,test/MfldSetTac.lean,test/MinImports.lean,test/SimpRw.lean,test/SplitIfs.lean,test/TermBeta.lean,test/TypeCheck.lean,test/UnsetOption.lean,test/Use.lean,test/basicTactics.lean,test/casesm.lean,test/convert.lean,test/fail_if_no_progress.lean,test/fun_prop_dev.lean,test/itauto.lean,test/meta.lean,test/notation3.lean,test/recover.lean,test/says.lean,test/symm.lean,test/trace.lean,test/trans.lean 54 5 ['github-actions', 'grunweg', 'joneugster', 'mathlib4-dependent-issues-bot'] nobody
231-67387
7 months ago
231-67387
7 months ago
0-36287
10 hours
16311 madvorak
author:madvorak
feat(Computability): regular languages are context-free --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability merge-conflict WIP 72/0 Mathlib.lean,Mathlib/Computability/Chomsky.lean,Mathlib/Computability/ContextFreeGrammar.lean 3 7 ['Rida-Hamadani', 'YaelDillies', 'github-actions', 'madvorak'] nobody
231-47182
7 months ago
231-47182
7 months ago
0-0
0 seconds
19943 AlexLoitzl
author:AlexLoitzl
feat(Computability): Add Chomsky Normal Form Grammar and translation - Define Chomsky normal form grammars - Add language-preserving translation between context-free grammars and Chomsky normal form grammars Co-authored-by: Martin Dvorak martin.dvorak@matfyz.cz --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor merge-conflict awaiting-author 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
231-46935
7 months ago
231-46935
7 months ago
37-29014
37 days
19616 adamtopaz
author:adamtopaz
fix: Fix the definition of the absolute Galois group of a field Previously it was defined as the Galois group of the algebraic closure, as opposed to the separable closure. Also, this adds some missing instances for this group. Still missing is compactness, but that seems like a bigger project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-number-theory merge-conflict awaiting-author
label:t-algebra$
23/8 Mathlib/FieldTheory/AbsoluteGaloisGroup.lean,Mathlib/FieldTheory/KrullTopology.lean 2 4 ['acmepjz', 'alreadydone', 'github-actions'] nobody
231-45170
7 months ago
231-45170
7 months ago
3-64280
3 days
17005 YnirPaz
author:YnirPaz
feat(SetTheory/Cardinal/Regular): define singular cardinals Define singular cardinals and prove basic lemmas about them. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory merge-conflict WIP 94/1 Mathlib.lean,Mathlib/SetTheory/Cardinal/Regular.lean,Mathlib/SetTheory/Ordinal/Basic.lean 3 28 ['YaelDillies', 'YnirPaz', 'github-actions', 'vihdzp'] nobody
228-80291
7 months ago
304-73473
10 months ago
34-18388
34 days
18952 Command-Master
author:Command-Master
chore: deprecate `Trunc` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict WIP 283/57 Mathlib/CategoryTheory/EpiMono.lean,Mathlib/CategoryTheory/Preadditive/Biproducts.lean,Mathlib/Data/DFinsupp/Defs.lean,Mathlib/Data/Fintype/Basic.lean,Mathlib/Data/Fintype/Option.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/LinearAlgebra/Determinant.lean,Mathlib/Logic/Equiv/List.lean 12 8 ['eric-wieser', 'github-actions', 'vihdzp'] nobody
228-31508
7 months ago
228-31508
7 months ago
0-0
0 seconds
18463 vihdzp
author:vihdzp
feat(SetTheory/Ordinal/Notation/FundamentalSequence): define type of fundamental sequences We define `Sequence α` as the type of sequences with length 0, 1, or `ω`, and give a basic API. A subsequent PR will introduce the notion of a (countable and computable) fundamental sequence and establish basic results. The goal of this is to generalize [`ONote.fundamentalSequence`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/SetTheory/Ordinal/Notation.html#ONote.fundamentalSequence) to allow the construction of fundamental sequences for other ordinal notations. --- See [my ordinal notation repository](https://github.com/vihdzp/ordinal-notation/blob/a6fdd7fe7cb521e686ea271902e7e5496f1804d3/OrdinalNotation/Cantor.lean#L1218) for a demonstration of how this API looks in practice. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory t-order merge-conflict 174/1 Mathlib.lean,Mathlib/SetTheory/Ordinal/Notation/Cantor.lean,Mathlib/SetTheory/Ordinal/Notation/FundamentalSequence.lean 3 19 ['YnirPaz', 'b-mehta', 'github-actions', 'vihdzp'] nobody
226-79668
7 months ago
226-79668
7 months ago
52-25108
52 days
12054 adomani
author:adomani
feat: auto-bugs This PR introduces a linter for suggesting bugs in tactics. See * #12077 * #12083 * #12084 for some bugs exposed by the test suite. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict awaiting-author 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
226-3363
7 months ago
226-3363
7 months ago
45-6057
45 days
5062 adomani
author:adomani
feat(Tactic/Prune + test/Prune): add `prune` tactic, for removing unnecessary hypotheses This tactic removes very conservatively all local declarations that 1. do not appear in the main goal, 2. do not appear in a declaration that appears in the main goal, 3. ... and so on recursively. The main motivation for this tactic is that all available variables in the current `namespace/section` appear in the goal state, not just the ones that are needed for the statement to type-check. Using `prune` mitigates this situation. The tactic also admits an optional natural number argument: `prune n` removes all variables that have not appeared at the `(n+1)`-st stage in the above list. Thus, `prune 0` only leaves the variables needed for the statement to type-check. Also, for sufficiently large `n`, `prune n` is a synonym for `prune`. [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/substitute.20for.20.60include.2Fomit.60.3F) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict modifies-tactic-syntax awaiting-author 181/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Prune.lean,test/Prune.lean 4 5 ['adomani', 'j-loreaux', 'kmill'] nobody
225-57070
7 months ago
225-57070
7 months ago
195-56460
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
224-22734
7 months ago
224-34788
7 months ago*
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) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) carleson t-measure-probability merge-conflict awaiting-author 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
224-21923
7 months ago
226-55407
7 months ago
2-42743
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
223-30607
7 months ago
224-34351
7 months ago*
0-0
0 seconds*
21099 chrisflav
author:chrisflav
chore(RingTheory/Generators): use unification hints for variables and relations When working with generators and presentations, we rely on the `MvPolynomial` API, but since the type of variables is bundled in `Generators R S`, many lemmas don't apply with `rw` or `simp`, because they can't see through the definition of `vars` in constructions such as `Generators.comp` and `Generators.localizationAway`. A possible approach is to make all of these constructions `abbrev`s, but this causes `simp` to also unfold `val` which is not always desirable. More generally, it is then harder to predict how instance search and `simp` behave. This approach is tried in #21050, but causes many regressions. This approach is less invasive, as it uses `unif_hint` to unify the `vars` (and `rels`) fields of constructions with the correct type. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
231/91 Mathlib/Algebra/Module/Presentation/Differentials.lean,Mathlib/RingTheory/Generators.lean,Mathlib/RingTheory/Kaehler/JacobiZariski.lean,Mathlib/RingTheory/Presentation.lean,Mathlib/RingTheory/Smooth/StandardSmooth.lean 5 16 ['chrisflav', 'erdOne', 'github-actions', 'leanprover-bot', 'mattrobball'] nobody
222-38504
7 months ago
222-38504
7 months ago
27-75210
27 days
21269 CharredLee
author:CharredLee
(WIP) feat (CategoryTheory/Topos): Add topos theory content This code contains basic definitions and results in topos theory, including the definition of a subobject classifier, power objects, and topoi. It is proved that every topos has exponential objects, i.e. "internal homs". The mathematical content follows chapter IV sections 1-2 of Mac Lane and Moerdijk's text "Sheaves in Geometry and Logic". --- - [x] depends on: #21281 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory merge-conflict awaiting-author WIP 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 ['CharredLee', 'gio256', 'github-actions', 'joelriou', 'mathlib4-dependent-issues-bot'] nobody
221-13207
7 months ago
221-13207
7 months ago
0-13879
3 hours
12394 JADekker
author:JADekker
feat : define pre-tight and tight measures Define tight measures (by first defining separable and pre-tight measures). Define some api for all three concepts Prove Ulam's tightness theorem and a strengthened version of this. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability merge-conflict please-adopt awaiting-author 503/0 Mathlib.lean,Mathlib/MeasureTheory/Measure/Tight.lean 2 34 ['EtienneC30', 'JADekker', 'github-actions', 'sgouezel'] nobody
220-42100
7 months ago
220-42100
7 months ago
2-604
2 days
20454 urkud
author:urkud
chore(TangentCone): review names Also add some `@[simp]` attrs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict 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
219-68503
7 months ago
219-68503
7 months ago
12-11675
12 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
219-43236
7 months ago
236-37300
7 months ago*
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
219-41600
7 months ago
236-37164
7 months ago*
0-0
0 seconds*
16550 awainverse
author:awainverse
feat(ModelTheory): A typeclass for languages expanding other languages Defines `L.Expands L'` to consist of a privileged injective inclusion, `L'.Inclusion L`, from `L'` to `L`, corresponding to one language being a subset of the other in set-theoretic foundations. Replaces `L.IsOrdered` with `L.Expands Language.order` and `L.OrderLHom` with `Language.order.Inclusion L` Redefines `leSymb` in terms of `Language.order.Inclusion L` Deletions: - `FirstOrder.Language.IsOrdered` - `FirstOrder.Language.OrderLHom` - `instance : IsOrdered Language.order` - `sum.instIsOrdered` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic merge-conflict awaiting-author 97/43 Mathlib/ModelTheory/LanguageMap.lean,Mathlib/ModelTheory/Order.lean 2 9 ['YaelDillies', 'awainverse', 'github-actions'] nobody
219-20971
7 months ago
219-20972
7 months ago
0-61590
17 hours
13686 fpvandoorn
author:fpvandoorn
feat: some finset lemmas * From the Sobolev inequality project * The increase in imports in `Mathlib.Data.Finset.Update` is not problematic: it is only imported in MeasureTheory files. Co-authored-by: Heather Macbeth 25316162+hrmacbeth@users.noreply.github.com --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict awaiting-author 69/7 Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finset/Lattice/Lemmas.lean,Mathlib/Data/Finset/Update.lean 3 7 ['YaelDillies', 'fpvandoorn', 'github-actions', 'urkud'] nobody
218-20602
7 months ago
218-20602
7 months ago
98-49006
98 days
14313 grhkm21
author:grhkm21
feat(RepresentationTheory/FdRep): FdRep is a full subcategory of Rep ``` /-- Equivalence between `FDRep` and the full subcategory of finite dimensional `Rep`. -/ def equivFiniteDimensional : FDRep k G ≌ FullSubcategory (fun V : Rep k G ↦ FiniteDimensional k V) ``` new-contributor t-algebra t-category-theory merge-conflict
label:t-algebra$
47/8 Mathlib/RepresentationTheory/FDRep.lean 1 19 ['github-actions', 'grhkm21', 'joelriou', 'kim-em', 'mathlib-bors'] nobody
217-55533
7 months ago
217-55533
7 months ago
125-12755
125 days
18626 hannahfechtner
author:hannahfechtner
feat : define Artin braid groups Define the Artin braid group on infinitely many strands. Includes a toGroup function which defines a function out of the braid group to any other group (given a function which satisfies the braid relations) (more to come in this file; next up: Artin braid groups on finitely many strands) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra merge-conflict awaiting-author
label:t-algebra$
91/0 Mathlib.lean,Mathlib/GroupTheory/SpecificGroups/BraidGroup/Basic.lean 2 22 ['github-actions', 'hannahfechtner', 'jcommelin', 'joelriou'] nobody
216-39844
7 months ago
216-39844
7 months ago
15-40648
15 days
10823 alexkeizer
author:alexkeizer
feat: convert curried type functions into uncurried type functions Adds a conversion `TypeFun.ofCurried : CurriedTypeFun.{u, v} n -> TypeFun.{u, v} n`, where `CurriedTypeFun.{u,v} n` is a (def-eq) abbreviation for `Type u -> ... -> Type u -> Type v`, i.e., the type of *curried* functions taking `n` arguments of type `Type u` to return an element of `Type v`, and `TypeFun.{u, v} n` is an abbreviation for `TypeVec.{u} n -> Type v`. It is generally more idiomatic to define type functions with multiple arguments in the curried style, but in the QPF development we use the uncurried equivalent `TypeVec n -> Type _`. Thus, having a canonical conversion from curried functions to uncurried gives us a canonical way to ask if a curried type function, say `Sum` is a QPF (namely, "is there an instance of `MvQPF (TypeFun.ofCurried Sum)`"). --- This is code ported from https://github.com/alexkeizer/QpfTypes, where this conversion is crucial in presenting a high-level interface, in terms of idiomatic, curried, type functions to users, while being built on QPFs (and thus, uncurried typefunctions) underneath. There is also a conversion in the other direction, from uncurried to curried, which I've decided to PR later, to keep this PR smaller and hopefully easier to review. - [x] depends on: #10818 (all changes to `Fin2.lean` are part of 10818, not the current PR) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict awaiting-author 66/0 Mathlib.lean,Mathlib/Data/TypeFun.lean 2 9 ['YaelDillies', 'alexkeizer', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
216-33564
7 months ago
unknown
unknown
13648 urkud
author:urkud
feat(Topology/Module): generalize `ContinuousLinearMap.compSL` Generalize `ContinuousLinearMap.compSL` to topological vector spaces. --- - [ ] depends on: #15217 This PR is not polished yet, but the main statement is there. @ADedecker This answers a question I asked you on Zulip a few months ago. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-analysis t-topology merge-conflict awaiting-author
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
214-56654
7 months ago
214-56654
7 months ago
0-0
0 seconds
21684 mattrobball
author:mattrobball
draft merge-conflict 13/11 Mathlib/CategoryTheory/Category/Cat/AsSmall.lean,Mathlib/CategoryTheory/Closed/FunctorToTypes.lean,Mathlib/CategoryTheory/Closed/Types.lean,Mathlib/FieldTheory/IsAlgClosed/Classification.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/Topology/Category/LightProfinite/Basic.lean,lean-toolchain 7 4 ['github-actions', 'leanprover-bot', 'mattrobball'] nobody
214-50224
7 months ago
214-50224
7 months ago
0-0
0 seconds
21722 mattrobball
author:mattrobball
test merge-conflict 76/23 Mathlib/CategoryTheory/Category/Cat/AsSmall.lean,Mathlib/CategoryTheory/Closed/FunctorToTypes.lean,Mathlib/CategoryTheory/Closed/Types.lean,Mathlib/FieldTheory/IsAlgClosed/Classification.lean,Mathlib/Order/Hom/Lattice.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/Topology/Category/LightProfinite/Basic.lean,lean-toolchain,scratch.lean 9 4 ['github-actions', 'leanprover-bot', 'mattrobball'] nobody
214-50223
7 months ago
214-50223
7 months ago
0-0
0 seconds
22408 JLimperg
author:JLimperg
Aesop forward bench: precomp only rpinf --- Not a real PR (yet), just for benchmarking. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) dependency-bump merge-conflict 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
214-45058
7 months ago
214-45058
7 months ago
0-0
0 seconds
21339 vihdzp
author:vihdzp
fix(Data/List/Lex): remove duplicate `List.LE` instance Mathlib currently duplicates the Lean core instance for `≤` in lists in an incompatible way. We delete this duplicate instance. See [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Two.20.60List.2ELE.60.20instances.3F/near/497241115). --- This is a very quick and dirty fix. Core Lean provides all of the theorems we need to prove `≤` forms a linear order, but it provides them in terms of `Std` relation typeclasses which currently see no use in Mathlib. I've added the instances that were required to get the list theorems working. In the future, we really ought to unify the core and Mathlib relation typeclasses. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 24/22 Mathlib/Data/List/Lex.lean,Mathlib/Data/String/Basic.lean,Mathlib/Topology/Category/Profinite/Nobeling.lean 3 1 ['github-actions'] nobody
214-37396
7 months ago
214-37396
7 months ago
16-65973
16 days
16421 FR-vdash-bot
author:FR-vdash-bot
feat: `QuotLike` This typeclass is primarily for use by type synonyms of `Quot` and `Quotient`. Using `QuotLike` API for type synonyms of `Quot` and `Quotient` will avoid defeq abuse caused by directly using `Quot` and `Quotient` APIs. --- Some of the naming may need to be discussed. For example, `⟦·⟧` is currently called `mkQ` in names. This distinguishes it from other `.mk`s and makes it possible to write the quotient map as `mkQ` `mkQ'` `mkQ_ h`. But this will also require changing the old lemma names. [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/migrate.20to.20.60QuotLike.60.20API) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data RFC merge-conflict awaiting-author 735/1 Mathlib.lean,Mathlib/Data/QuotLike.lean,Mathlib/Logic/Relation.lean,test/QuotLike.lean 4 7 ['FR-vdash-bot', 'YaelDillies', 'github-actions', 'urkud'] nobody
213-84111
6 months ago
213-84111
6 months ago
58-8650
58 days
16837 vihdzp
author:vihdzp
feat(Data/List/SplitBy): characterization of `List.splitBy` --- - [x] depends on: #16818 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict awaiting-author 151/9 Mathlib/Data/List/Flatten.lean,Mathlib/Data/List/SplitBy.lean 2 13 ['YaelDillies', 'github-actions', 'mathlib4-dependent-issues-bot', 'vihdzp'] nobody
213-84111
6 months ago
213-84111
6 months ago
9-85039
9 days
19700 vihdzp
author:vihdzp
chore(SetTheory/Ordinal/Basic): tweak `type r = 0`, `type r = 1`, etc. lemmas We give shorter names to these lemmas (e.g. `type_eq_zero` instead of `type_eq_zero_of_empty`), and deprecate a bunch of duplicates. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory awaiting-CI merge-conflict 51/38 Mathlib/SetTheory/Ordinal/Basic.lean 1 1 ['github-actions'] nobody
213-83864
6 months ago
213-83864
6 months ago
0-0
0 seconds
21959 BGuillemet
author:BGuillemet
feat(Topology/ContinuousMap): Stone-Weierstrass theorem for MvPolynomial Add the subalgebra of multivariate polynomials and prove it separates points, on the same model as `ContinuousMap/Polynomial.lean`. Prove the Stone-Weierstrass theorem and some variations for multivariate polynomials. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology merge-conflict 285/1 Mathlib.lean,Mathlib/Topology/ContinuousMap/MvPolynomial.lean,Mathlib/Topology/ContinuousMap/StoneWeierstrass.lean 3 1 ['github-actions'] nobody
212-41547
6 months ago
212-41547
6 months ago
16-76141
16 days
19177 adomani
author:adomani
test: the findDefEqAbuse linter This is a prototype, as per [this Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Locating.20defeq.20abuse) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict 126/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/FindDefEqAbuse.lean,MathlibTest/FindDefEqAbuse.lean 5 1 ['github-actions'] nobody
210-43560
6 months ago
210-43560
6 months ago
0-0
0 seconds
20750 adomani
author:adomani
feat: the envLinter syntax linter The `envLinter` syntax linter emits a warning at the end of a file if `#lint` reports an error. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-linter merge-conflict 69/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/EnvLinter.lean,MathlibTest/EnvLinter.lean 5 15 ['adomani', 'github-actions', 'grunweg'] nobody
210-43314
6 months ago
210-43314
6 months ago
51-71438
51 days
22359 adomani
author:adomani
feat(whitespace): do not allow indented doc-strings In a doc-string, Do not allow the first character after the first line break to be a space. --- There are approximately 2.5k exceptions. I think that they should be unindented, judging from the sample that I looked at, but won't act on it, unless there is a clear plan to fix and merge this modification! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-linter merge-conflict WIP 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
210-42479
6 months ago
210-42479
6 months ago
0-0
0 seconds
18470 FR-vdash-bot
author:FR-vdash-bot
perf: lower the priority of `Normed*.to*` instances --- From #7873. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) slow-typeclass-synthesis t-algebra t-analysis merge-conflict
label:t-algebra$
28/0 Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean 2 9 ['FR-vdash-bot', 'github-actions', 'jcommelin', 'leanprover-bot'] nobody
208-12974
6 months ago
208-12974
6 months ago
130-5197
130 days
16944 YnirPaz
author:YnirPaz
feat(SetTheory/Cardinal/Cofinality): lemmas about limit ordinals and cofinality Prove that a singular cardinal has a limit aleph index and that a limit ordinal and positive cofinality. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory merge-conflict WIP 18/0 Mathlib/SetTheory/Cardinal/Cofinality.lean 1 8 ['YnirPaz', 'github-actions', 'vihdzp'] nobody
207-5850
6 months ago
207-5850
6 months ago
1-84890
1 day
17368 Felix-Weilacher
author:Felix-Weilacher
feat(Topology/Baire/BaireMeasurable): add the Kuratowski-Ulam theorem Add the Kuratowski-Ulam theorem, which one can think of as a "Fubini" for Baire category. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 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
206-37043
6 months ago
206-37043
6 months ago
72-13986
72 days
8767 eric-wieser
author:eric-wieser
refactor(Cache): tidy lake-manifest parsing in Cache This now respects local copies of Mathlib dependencies (though in practice these invalidate the *online* cache because to point to local copies of Mathlib, the hash for `lakefile.lean` and `lake-manifest.json` is first invalidated). --- - [x] depends on: #11492 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 49/49 Cache/Hashing.lean,Cache/IO.lean,lake-manifest.json 3 8 ['digama0', 'eric-wieser', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
205-12706
6 months ago
386-65056
1 year ago
119-35643
119 days
22434 qawbecrdtey
author:qawbecrdtey
feat(Mathlib/Analysis/Normed/Lp/WithLp): Added more instances for `WithLp` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict awaiting-author 51/22 Mathlib/Analysis/Normed/Lp/WithLp.lean 1 11 ['eric-wieser', 'github-actions', 'leanprover-bot', 'qawbecrdtey'] nobody
204-42145
6 months ago
204-42145
6 months ago
1-79072
1 day
15578 znssong
author:znssong
feat(Function): Fixed points of function `f` with `f(x) >= x` We added some lemmas of fixed points of function `f` with `f(x) >= x`, where `f : α → α` is a function on a finite type `α`. This will be needed in proof of Bondy-Chvátal theorem. --- See also branch `meow-sister/BondyChvatal`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis merge-conflict awaiting-author 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
204-37373
6 months ago
204-37373
6 months ago
29-48368
29 days
22805 ScottCarnahan
author:ScottCarnahan
feat (FieldTheory/Finite): fixed points of frobenius This PR identifies the prime field with the fixed points of frobenius. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict WIP
label:t-algebra$
325/7 Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/FieldTheory/Finite/GaloisField.lean 4 1 ['github-actions'] nobody
202-48085
6 months ago
202-48085
6 months ago
0-0
0 seconds
22660 Ruben-VandeVelde
author:Ruben-VandeVelde
chore: follow naming convention around Group.IsNilpotent --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
133/67 Mathlib/GroupTheory/Frattini.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/SpecificGroups/ZGroup.lean 3 1 ['github-actions'] nobody
200-63802
6 months ago
200-63802
6 months ago
10-48025
10 days
13999 adomani
author:adomani
feat: a linter to flag potential confusing conventions Currently, the linter flags all uses of * `a - b` where `a b : Nat`; * `a / b` where `a b : Nat` or `a b : Int`; * `a / 0` more or less whenever the type of `a` has a `0` and a division. This comes up often when starting to use Lean and hopefully the flag can help mitigate initial confusions. When the local context contains the relevant inequality/divisibility hypothesis, the linter is quiet. A recent [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/113489-new-members/topic/not.20understanding.20deliberate.20error.20with.20.60ring.60.20over.20.E2.84.95/near/445879310) --- To make sure that the linter does not produce errors, #14007 activates the linter on "all" of mathlib. The expectation is that no error is thrown, just warnings. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict 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
200-9436
6 months ago
200-9436
6 months ago
7-47472
7 days
15991 vihdzp
author:vihdzp
feat(SetTheory/Ordinal/CantorNormalForm): alternate CNF recursion principle The idea of this recursion principle is that you can build an ordinal by adding one power of `b` at a time, as long as `1 < b ≤ ω`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory t-logic merge-conflict awaiting-author 43/0 Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/CantorNormalForm.lean,Mathlib/SetTheory/Ordinal/Exponential.lean 3 8 ['YaelDillies', 'eric-wieser', 'github-actions', 'vihdzp'] nobody
199-57620
6 months ago
199-57620
6 months ago
91-50443
91 days
19698 vihdzp
author:vihdzp
refactor(SetTheory/Cardinal/Cofinality): redefine `Order.cof` We redefine `Order.cof` as a function on preorders, rather than one well-ordered relations. This allows us to use the `IsCofinal` API, alongside all the other goodies that come from a proper order structure. Finally, we clean up the `Ordinal.cof` API by relying on order results, rather than trying to haphazardly treat ordinals as sets. --- - [ ] depends on: #21972 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory merge-conflict WIP 502/583 Mathlib/Order/Cofinal.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Ordinal/Basic.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
199-55160
6 months ago
199-55160
6 months ago
0-0
0 seconds
20967 joneugster
author:joneugster
tracking(CategoryTheory/Enriched/Limits): add conical limits Tracking PR for adding conical limits Co-authored-by: Emily Riehl Co-authored-by: Dagur Asgeirsson --- - [x] depends on: #20904 - [x] depends on: #20907 - [x] depends on: #20959 - [x] depends on: #20963 - [x] depends on: #20964 - [x] depends on: #20965 - content source: emilyriehl/infinity-cosmos#78 New implementation (not reflected on this branch yet): - [x] depends on: #22917 - [x] depends on: #22921 - [ ] depends on: #22923 - [ ] depends on: #22924 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) infinity-cosmos t-category-theory merge-conflict WIP 619/1 Mathlib.lean,Mathlib/CategoryTheory/Enriched/Limits/HasConicalLimits.lean,Mathlib/CategoryTheory/Enriched/Limits/HasConicalProducts.lean,Mathlib/CategoryTheory/Enriched/Limits/HasConicalPullbacks.lean,Mathlib/CategoryTheory/Enriched/Limits/HasConicalTerminal.lean,Mathlib/CategoryTheory/Enriched/Limits/IsConicalLimit.lean,Mathlib/CategoryTheory/Enriched/Limits/IsConicalTerminal.lean,Mathlib/CategoryTheory/Enriched/Ordinary/Basic.lean 8 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
199-15042
6 months ago
199-15044
6 months ago
0-0
0 seconds
19013 quangvdao
author:quangvdao
feat(Algebra/BigOperators/Fin): Add `finSigmaFinEquiv` This PR adds `finSigmaFinEquiv` which is the equivalence `(i : Fin m) × Fin (n i) ≃ Fin (∑ i, n i)`. This is the dependent version of `finProdFinEquiv`. CI should be passing, but there are two things I'd like feedback on: 1. When defining the mappings, I have to consider `m = 0` separately. Is there a more uniform definition? 2. I'm proving this as a step toward defining `Fin.join`, which is the analogue of `List.join`. I can now technically define `Fin.join` as: ``` variable {a : Fin n → ℕ} {α : (i : Fin n) → (j : Fin (a i)) → Sort*} def join (v : (i : Fin n) → (j : Fin (a i)) → α i j) (k : Fin (∑ i, a i)) : α (finSigmaFinEquiv.invFun k).1 (finSigmaFinEquiv.invFun k).2 := v (finSigmaFinEquiv.invFun k).1 (finSigmaFinEquiv.invFun k).2 ``` but this looks horrible. This highly motivates refactoring `invFun` as two new definitions: ``` def func1 {n : ℕ} (a : Fin n → ℕ) (k : Fin (∑ i, a i)) : Fin n := sorry def func2 {n : ℕ} (a : Fin n → ℕ) (k : Fin (∑ i, a i)) : Fin (a (func1 a k)) := sorry ``` I'm not sure what to call these functions. The analogues in the non-dependent case are `divNat` and `modNat`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author
label:t-algebra$
92/16 Mathlib/Algebra/BigOperators/Fin.lean 1 14 ['YaelDillies', 'eric-wieser', 'github-actions', 'quangvdao'] nobody
198-31469
6 months ago
198-31469
6 months ago
3-28829
3 days
20389 eric-wieser
author:eric-wieser
feat: generalize results to `WithLp 0` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict 116/53 Mathlib/Analysis/Normed/Lp/PiLp.lean 1 1 ['github-actions'] nobody
197-20017
6 months ago
197-20017
6 months ago
0-0
0 seconds
19189 YnirPaz
author:YnirPaz
feat(SetTheory/Ordinal/Arithmetic): order isomorphism between omega and the natural numbers --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory merge-conflict awaiting-author 44/0 Mathlib/Order/SuccPred/Limit.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean 2 21 ['YaelDillies', 'YnirPaz', 'github-actions', 'vihdzp'] nobody
197-1102
6 months ago
197-1102
6 months ago
47-37012
47 days
19227 adomani
author:adomani
fix(CI): unwrap `lake test` in problem matcher ... and also add a `#guard_msgs` in `AssertImported` test, so that `lake test` properly fails. [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/CI.3A.20noisy.20.22test.20mathlib.22/near/483126955) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI merge-conflict awaiting-author 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
195-50505
6 months ago
195-50506
6 months ago
22-71271
22 days
20874 grunweg
author:grunweg
chore(nolint.yml): use shallow clones This should be sufficient, and be slightly faster on CI. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI merge-conflict awaiting-author 0/3 .github/workflows/nolints.yml 1 2 ['bryangingechen', 'github-actions'] nobody
195-50260
6 months ago
195-50260
6 months ago
0-15573
4 hours
15774 kkytola
author:kkytola
feat: Topology on `ENat` This PR may contain some results that are not in the PR that adds a toppology on `ENat`. --- The immediate motivation is to be able to make the right continuity statement of the extended floor function on `ENNReal`, when this floor function is made `ENat`valued as suggested in the PR review of #15269. The API here is modelled on the early parts of [the corresponding ENNReal file](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Instances/ENNReal.html#top), although much of this case is more trivial. - [x] depends on: #15380 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order t-topology merge-conflict WIP 161/9 Mathlib/Data/ENat/Basic.lean,Mathlib/Topology/Instances/ENat.lean 2 4 ['YaelDillies', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
191-8037
6 months ago
191-8037
6 months ago
0-6819
1 hour
18284 chrisflav
author:chrisflav
feat(AlgebraicGeometry): relative gluing of schemes We show https://stacks.math.columbia.edu/tag/01LH using #14208. This shall be used to construct the relative spectrum of a quasi-coherent algebra. --- - [ ] depends on: #14208 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry merge-conflict WIP 1393/7 Mathlib.lean,Mathlib/AlgebraicGeometry/Gluing.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean,Mathlib/AlgebraicGeometry/RelativeGluing.lean,Mathlib/AlgebraicGeometry/Sites/Representability.lean,Mathlib/CategoryTheory/Functor/FullyFaithful.lean,Mathlib/CategoryTheory/Limits/Shapes/Types.lean,Mathlib/CategoryTheory/MorphismProperty/Representable.lean 8 n/a ['github-actions', 'joelriou', 'mathlib4-dependent-issues-bot'] nobody
190-30789
6 months ago
unknown
unknown
16810 urkud
author:urkud
feat: define `(a : ENat) ^ (b : ENat)` The definition agrees with `Cardinal.toENat`, i.e., `#(α → β) = #β ^ #α`, where `#` is the not-yet-defined `ENat.card α = Cardinal.toENat (Cardinal.mk α)`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory t-data merge-conflict 51/0 Mathlib.lean,Mathlib/Data/ENat/Pow.lean 2 1 ['github-actions'] nobody
189-73630
6 months ago
189-73630
6 months ago
0-0
0 seconds
16009 Command-Master
author:Command-Master
acyclic graph --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics merge-conflict WIP 232/0 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 1 ['github-actions'] nobody
189-42586
6 months ago
189-42586
6 months ago
0-0
0 seconds
20613 grunweg
author:grunweg
chore: golf using `List.toArrayMap` --- Depends on batteries#1090 landing in mathlib. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict 27/21 Cache/Main.lean,Cache/Requests.lean,Mathlib/Lean/Meta/RefinedDiscrTree/Lookup.lean,Mathlib/Tactic/DeriveTraversable.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/MoveAdd.lean,Mathlib/Tactic/ToAdditive/Frontend.lean,Mathlib/Util/CompileInductive.lean,Mathlib/Util/GetAllModules.lean,Mathlib/Util/Notation3.lean,scripts/autolabel.lean 11 2 ['github-actions', 'vihdzp'] nobody
187-7003
6 months ago
187-7003
6 months ago
22-82622
22 days
15989 vihdzp
author:vihdzp
feat(SetTheory/Ordinal/Principal): golf theorems on additively principal ordinals We add some new results on additively principal ordinals and use them to simplify existing theorems. --- - [x] depends on: #15990 - [x] depends on: #17740 - [x] depends on: #17741 - [x] depends on: #17742 - [x] depends on: #17842 - [x] depends on: #18902 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory t-logic merge-conflict awaiting-author 64/59 Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Notation.lean,Mathlib/SetTheory/Ordinal/Principal.lean 3 8 ['YaelDillies', 'github-actions', 'kbuzzard', 'mathlib4-dependent-issues-bot', 'vihdzp'] nobody
185-85246
6 months ago
185-85246
6 months ago
60-46576
60 days
22682 grunweg
author:grunweg
chore(Topology/Homeomorph): split out various constructions This makes `Homeomorph.lean` slightly more manageable, and also is a mild import reduction. edit: also split out IsHomeomorph, as this allows removing the dependencies on Constructions. Let's see if this gains much --- I don't feel strongly about this PR, but we might as well take it. - [ ] depends on: #22681 - [ ] depends on #22827 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt t-topology RFC merge-conflict 341/290 Mathlib.lean,Mathlib/Topology/Category/TopCat/ULift.lean,Mathlib/Topology/Homeomorph/Constructions.lean,Mathlib/Topology/Homeomorph/IsHomeomorph.lean,Mathlib/Topology/Homeomorph/Lemmas.lean,Mathlib/Topology/NoetherianSpace.lean 6 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
185-83009
6 months ago
185-83009
6 months ago
14-35834
14 days
21018 markimunro
author:markimunro
feat(Data/Matrix): add file with key definitions and theorems about elementary row operations Prove that each elementary row operation is equivalent to a multiplication by an elementary matrix, has another row operation which inverts it, and that each elementary matrix has a left inverse. This is a very large PR and I understand it will take time. This is my first one and will likely have issues but I will be ready to answer questions/fix them as soon as possible. Co-authored-by: Christopher Lynch --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor merge-conflict awaiting-author enhancement 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 n/a ['chrisflav', 'eric-wieser', 'github-actions', 'j-loreaux', 'markimunro'] nobody
185-72772
6 months ago
unknown
unknown
23514 eric-wieser
author:eric-wieser
refactor: smooth over Lattice/LinearOrder inheritance This fixes the forgetful inheritance in `CompleteLinearOrder` and `ConditionallyCompleteLinearOrder`, which previously did not carry `compare` fields. (edit: moved to #23515) The following is the inheritance diagram before, where the dotted lines are manual instances. Note that every lattice typeclass that extends `LinearOrder` has to implement another dotted line edge, and remember to copy all the necessary data fields. ```mermaid graph TD LinearOrder --> Min,Max; LinearOrder --> PartialOrder; Lattice --> PartialOrder; CompleteLinearOrder --> Lattice; ConditionallyCompleteLinearOrder --> Lattice; LinearOrder-.-> Lattice; CompleteLinearOrder -.-> LinearOrder; ConditionallyCompleteLinearOrder -.-> LinearOrder; ``` This change introduces two new auxiliary typeclasses, to encapsulate these troublesome edges. `LinearOrderedLattice` can be thought of as `LinearOrder`, but with `sup`/`inf` instead of `min`/`max`. This is crucial, because it ensures the duplicate fields are merged in `extends CompleteLattice X, LinearOrderedLattice X`, which would not be the case for `extends CompleteLattice X, LinearOrder X`. The result is: ```mermaid graph TD LinearOrder --> Min,Max; LinearOrder --> LinearOrderBase; LinearOrderBase --> PartialOrder; Lattice --> PartialOrder; LinearOrderedLattice -.-> LinearOrder; LinearOrderedLattice --> LinearOrderBase; LinearOrderedLattice --> Lattice; CompleteLinearOrder --> LinearOrderedLattice; ConditionallyCompleteLinearOrder --> LinearOrderedLattice; ``` --- - [ ] depends on: #23515 - [ ] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 85/66 Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Order/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean,Mathlib/Order/Defs/LinearOrder.lean,Mathlib/Order/Lattice.lean 7 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
185-12202
6 months ago
185-12202
6 months ago
0-3019
50 minutes
20746 JLimperg
author:JLimperg
Aesop forward branch test --- This is not a real PR; I just want to benchmark this Aesop branch. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 14/6 .github/workflows/build.yml,Mathlib/Data/Nat/Prime/Defs.lean,lake-manifest.json,lakefile.lean,scripts/bench/fake-root/lib/lean/libleanshared.so,scripts/bench/run 6 11 ['JLimperg', 'Kha', 'github-actions', 'leanprover-bot'] nobody
184-56008
6 months ago
242-38961
8 months ago
0-0
0 seconds
22810 pechersky
author:pechersky
feat(Counterexamples): metric space not induced by norm Because the distance is not homogeneous --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #22845 t-analysis t-topology merge-conflict WIP 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
184-48664
6 months ago
184-48692
6 months ago
0-84180
23 hours
13124 FR-vdash-bot
author:FR-vdash-bot
chore: remove `CovariantClass` and `ContravariantClass` Lean cannot handle `CovariantClass` and `ContravariantClass` correctly - TC slowness - [Zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/TC.20slowness) - https://github.com/leanprover-community/mathlib4/issues/6646#issuecomment-1691792488 - It may also have made #6326 fail. - Needs a weird hack to find instance: #9252 --- - [x] depends on: #13154 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 602/486 Mathlib/Algebra/AddConstMap/Basic.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/Group/Subgroup/Pointwise.lean,Mathlib/Algebra/Group/Submonoid/Pointwise.lean,Mathlib/Algebra/Group/UniqueProds/Basic.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/AddTorsor.lean,Mathlib/Algebra/Order/Group/Action.lean,Mathlib/Algebra/Order/Group/DenselyOrdered.lean,Mathlib/Algebra/Order/Group/Units.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean,Mathlib/Algebra/Order/GroupWithZero/WithZero.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/OrderDual.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Algebra/Ring/Subring/Pointwise.lean,Mathlib/Algebra/Ring/Subsemiring/Pointwise.lean,Mathlib/Analysis/SumOverResidueClass.lean,Mathlib/Data/DFinsupp/Lex.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/GroupTheory/OrderOfElement.lean,Mathlib/Order/Filter/IsBounded.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/RingTheory/Ideal/Pointwise.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/Topology/Algebra/Order/LiminfLimsup.lean 37 6 ['FR-vdash-bot', 'MichaelStollBayreuth', 'github-actions', 'leanprover-bot', 'mathlib4-dependent-issues-bot'] nobody
183-76641
6 months ago
183-76641
6 months ago
0-1769
29 minutes
20401 RemyDegenne
author:RemyDegenne
feat: add sigmaFinite_iUnion ```lean lemma sigmaFinite_iUnion (μ : Measure α) {s : ℕ → Set α} (h_meas : MeasurableSet (⋃ n, s n)) [∀ n, SigmaFinite (μ.restrict (s n))] : SigmaFinite (μ.restrict (⋃ n, s n)) ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability merge-conflict awaiting-author 37/28 Mathlib/MeasureTheory/Decomposition/Exhaustion.lean,Mathlib/MeasureTheory/Measure/Typeclasses.lean 2 4 ['RemyDegenne', 'github-actions', 'sgouezel'] nobody
182-81795
5 months ago
182-81796
5 months ago
0-73190
20 hours
19275 eric-wieser
author:eric-wieser
fix: if nolint files change, do a full rebuild Otherwise CI will succeed when removing entries from the file, but fail later when someone changes something unrelated. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict delegated 8/0 lakefile.lean 1 20 ['YaelDillies', 'adomani', 'eric-wieser', 'github-actions', 'grunweg', 'mathlib-bors'] nobody
182-45963
5 months ago
182-45963
5 months ago
0-214
3 minutes
12251 ScottCarnahan
author:ScottCarnahan
refactor(RingTheory/HahnSeries) : several generalizations This PR is a container for several smaller PRs that refactor and generalize the existing Hahn series theory. It is (I think) all we need from Hahn series to get a palatable theory of vertex algebras off the ground (other prerequisites from Lie algebras will eventually come in a different PR). Major changes include: - equivalence between iterated Hahn series and Hahn series on Lex products. - introduce `orderTop` and `leadingCoeff` functions. Here, `orderTop` is a `WithTop Γ`-valued version of `order` that does not need `[Zero Γ]` and `leadingCoeff` returns the coefficient of the minimal element of support (or zero if empty). - introduce ordered and cancellative vector addition classes together with some basic theory e.g., finiteness of antidiagonals for partially well-ordered sets. - `HahnSeries Γ R`-module structure on `HahnModule Γ' R V`, when `Γ` is an `OrderedCancelAddCommMonoid`, `Γ'` is a `PartialOrder` with `OrderedCancelVAdd Γ Γ'`, `R` is a semiring, and `V` is an `R`-module. - Move `AddVal` to a separate file - the underlying function is just `orderTop`, but the description of the valuation needs an additional import and an `IsDomain` hypothesis. Results that depended on `AddVal` are changed to use `orderTop` and generalized. --- - [x] depends on: #10781 [HahnSeries on Lex product] - [x] depends on: #10846 [HahnModule] - [x] depends on: #11965 [orderTop] - [x] depends on: #11979 [OrderedVAdd] - [x] depends on: #12996 [leadingTerm] - [x] depends on: #16649 - [x] depends on: #16701 - [x] depends on: #17004 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order t-algebra merge-conflict WIP
label:t-algebra$
1059/97 Mathlib/RingTheory/HahnSeries/Addition.lean,Mathlib/RingTheory/HahnSeries/Basic.lean,Mathlib/RingTheory/HahnSeries/HEval.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean,Mathlib/RingTheory/HahnSeries/PowerSeries.lean,Mathlib/RingTheory/HahnSeries/Summable.lean 6 n/a ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
182-32384
5 months ago
unknown
unknown
22727 grunweg
author:grunweg
feat: rewrite the isolated by and colon linters in Lean --- - depends on #22726 - depends on: #22728 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict awaiting-author 128/96 Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/Basic.lean,Mathlib/Data/Finsupp/AList.lean,Mathlib/Data/Int/ModEq.lean,Mathlib/Data/List/Nodup.lean,Mathlib/Data/List/TFAE.lean,Mathlib/Data/Matroid/Circuit.lean,Mathlib/Data/Matroid/Minor/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Factors.lean,Mathlib/LinearAlgebra/TensorProduct/Vanishing.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Probability/Kernel/WithDensity.lean,Mathlib/RingTheory/NoetherNormalization.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Topology/Sets/OpenCover.lean,scripts/lint-style.py 15 3 ['adomani', 'github-actions', 'grunweg'] nobody
181-21681
5 months ago
181-21681
5 months ago
10-50342
10 days
22027 vihdzp
author:vihdzp
chore(SetTheory/Ordinal/FixedPoint); review `Ordinal.nfp` API This PR does the following: - add `iff` variants of various theorems, renaming some in the process - weaken some assumptions slightly - golf throughout --- - [x] depends on: #22017 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory merge-conflict 64/61 Mathlib/Logic/Equiv/List.lean,Mathlib/SetTheory/Ordinal/FixedPoint.lean 2 3 ['github-actions', 'grunweg', 'mathlib4-dependent-issues-bot'] nobody
181-21554
5 months ago
183-74914
6 months ago
43-68322
43 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 new-contributor t-measure-probability t-analysis merge-conflict awaiting-author 60/1 Mathlib/MeasureTheory/Integral/FundThmCalculus.lean 1 3 ['github-actions', 'hrmacbeth', 'victorliu5296'] nobody
180-67761
5 months ago
180-67761
5 months ago
51-85104
51 days
22701 ctchou
author:ctchou
feat(Combinatorics): the Katona circle method This file formalizes the Katona circle method. From PlainCombi (LeanCamCombi): https://github.com/YaelDillies/LeanCamCombi/blob/master/LeanCamCombi/PlainCombi/KatonaCircle.lean Co-authored-by: Yaël Dillies new-contributor t-combinatorics merge-conflict 121/0 Mathlib.lean,Mathlib/Combinatorics/KatonaCircle.lean 2 1 ['github-actions'] nobody
180-17316
5 months ago
180-17316
5 months ago
30-8337
30 days
23402 mattrobball
author:mattrobball
refactor(LinearAlgebra.TensorProduct): make `TensorProduct` irreducible Mathematicians generally do not reason about tensor products using a particular model, precisely because the universal properties are more natural and the precise instantiations are too complicated for most purposes. Similarly, we shouldn't allow Lean to look inside `TensorProduct` and encourage building API on top of it to avoid definitional abuse. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
124/69 Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/LinearAlgebra/QuadraticForm/TensorProduct.lean,Mathlib/LinearAlgebra/QuadraticForm/TensorProduct/Isometries.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Subalgebra.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean,Mathlib/RingTheory/Bialgebra/TensorProduct.lean,Mathlib/RingTheory/Coalgebra/TensorProduct.lean,Mathlib/RingTheory/Kaehler/CotangentComplex.lean,Mathlib/RingTheory/Kaehler/JacobiZariski.lean,Mathlib/RingTheory/LocalRing/Module.lean,Mathlib/RingTheory/TensorProduct/Basic.lean 15 8 ['eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
179-72021
5 months ago
179-72022
5 months ago
0-0
0 seconds
15943 urkud
author:urkud
feat: add `ProdQuotientMapSpace` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 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
178-86133
5 months ago
178-86136
5 months ago
0-0
0 seconds
23786 grunweg
author:grunweg
Mr librarynote def 2b --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict WIP 510/484 Archive/Imo/Imo2019Q2.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/Category/Ring/Limits.lean,Mathlib/Algebra/Colimit/Ring.lean,Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Algebra/Field/MinimalAxioms.lean,Mathlib/Algebra/Field/Subfield/Defs.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/End.lean,Mathlib/Algebra/Group/Action/Hom.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/Group/MinimalAxioms.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Scalar.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/End.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Equiv.lean,Mathlib/Algebra/GroupWithZero/InjSurj.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/HierarchyDesign.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Lie/OfAssociative.lean,Mathlib/Algebra/Module/Defs.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/Module/Rat.lean,Mathlib/Algebra/Module/RingHom.lean,Mathlib/Algebra/Module/ZMod.lean,Mathlib/Algebra/NoZeroSMulDivisors/Basic.lean,Mathlib/Algebra/NoZeroSMulDivisors/Defs.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Group/InjSurj.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Hom/Basic.lean,Mathlib/Algebra/Order/Hom/Ring.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/Module/Defs.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/ExistsOfLE.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Star.lean,Mathlib/Algebra/Order/Star/Basic.lean,Mathlib/Algebra/Order/Sub/Basic.lean,Mathlib/Algebra/Ring/Action/Basic.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/Ring/InjSurj.lean,Mathlib/Algebra/Ring/MinimalAxioms.lean,Mathlib/Algebra/Ring/Subring/Defs.lean,Mathlib/Algebra/Ring/Subsemiring/Defs.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Algebra/Star/StarRingHom.lean,Mathlib/Algebra/Star/Subalgebra.lean,Mathlib/AlgebraicGeometry/Scheme.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Note.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/Convex/Uniform.lean,Mathlib/Analysis/InnerProductSpace/Convex.lean,Mathlib/Analysis/InnerProductSpace/OfNorm.lean,Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Constructions.lean,Mathlib/Analysis/Normed/Group/Seminorm.lean,Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Operator/LinearIsometry.lean,Mathlib/Analysis/Normed/Order/Lattice.lean,Mathlib/Analysis/Normed/Ring/Basic.lean,Mathlib/Analysis/RCLike/Lemmas.lean,Mathlib/CategoryTheory/Category/Basic.lean,Mathlib/CategoryTheory/Comma/Over/OverClass.lean,Mathlib/CategoryTheory/Monoidal/Skeleton.lean,Mathlib/CategoryTheory/MorphismProperty/Comma.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Data/FunLike/Fintype.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/Nat/Cast/Defs.lean,Mathlib/Data/Nat/Init.lean 180 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
178-78234
5 months ago
178-78236
5 months ago
0-0
0 seconds
23411 PatrickMassot
author:PatrickMassot
chore: remove finiteness from Order.Filter.Lift Co-authored-by: Anatole Dedecker --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) longest-pole t-topology merge-conflict 48/21 Mathlib/Dynamics/TopologicalEntropy/DynamicalEntourage.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Finite.lean,Mathlib/Order/Filter/Lift.lean,Mathlib/Order/Filter/SmallSets.lean,Mathlib/Topology/Algebra/ContinuousMonoidHom.lean,Mathlib/Topology/Basic.lean 7 4 ['Vierkantor', 'github-actions', 'kim-em', 'leanprover-community-bot-assistant'] nobody
178-64030
5 months ago
178-83599
5 months ago
10-21608
10 days
22579 kvanvels
author:kvanvels
doc(Topology/Defs/Induced): fix comments on three functions related to RestrictGenTopology --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict awaiting-author documentation 10/9 Mathlib/Topology/Defs/Induced.lean,Mathlib/Topology/RestrictGen.lean 2 4 ['github-actions', 'kvanvels', 'leanprover-community-bot-assistant', 'urkud'] nobody
177-74664
5 months ago
177-74666
5 months ago
12-18679
12 days
19771 robertylewis
author:robertylewis
perf: qqify two functions in linarith --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 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
177-54170
5 months ago
177-54171
5 months ago
0-0
0 seconds
22308 plp127
author:plp127
feat (Analysis/Convex): Generalize `Convex` lemmas to `StarConvex` This PR generalizes many lemmas assuming `Convex 𝕜 s` to assume `StarConvex 𝕜 0 s`. --- - [x] depends on: #22421 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis merge-conflict WIP 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
177-53681
5 months ago
177-53683
5 months ago
0-0
0 seconds
21488 imbrem
author:imbrem
feat(CategoryTheory/Monoidal): premonoidal categories Add support for premonoidal categories --- Still want to add support for: - Premonoidal braided/symmetric categories - The monoidal coherence theorem, which I've already ported in my `discretion` library - The `coherence` tactic, which should work fine for premonoidal categories too but wanted to get this in front of reviewers ASAP to make sure my general approach was alright [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory merge-conflict 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
177-49949
5 months ago
177-49950
5 months ago
58-20339
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. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory merge-conflict 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
177-49947
5 months ago
177-49949
5 months ago
43-83249
43 days
13653 adomani
author:adomani
feat: the unusedSetOptionIn linter --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-linter merge-conflict 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
176-80785
5 months ago
176-80787
5 months ago
0-0
0 seconds
19425 hrmacbeth
author:hrmacbeth
perf: gcongr forward-reasoning adjustment This PR changes the "forward-reasoning" component of `gcongr`, rendering it more efficient, particularly in problems with a large number of variables/hypotheses in the context. Previously `gcongr` attempted to match *every* `LocalDecl` against *every* node in the parse tree using *each* of the five implemented `@[gcongr_forward]` mini-tactics: matching directly, matching after applying `symm`, matching after applying `le_of_lt`, etc etc. The new algorithm filters out the non-Prop `LocalDecl`s, and also adjusts the `@[gcongr_forward]` extensions so that, rather than re-apply the relevant lemmas (`symm`, `le_of_lt`, etc) at every node in the parse tree, the lemmas are applied in advance to the `LocalDecl`s and the result (if successful) stored. The performance effect on mathlib as a whole is miniscule, but it speeds up the profiler's count of "tactic execution of Mathlib.Tactic.GCongr" in the newly-added test from 257 ms to 47 ms, and has a similar effect on real-life examples in an analysis project of mine. Co-authored-by: Mario Carneiro --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) (Note that Mario provided the ideas but not the code, so please review with appropriate diligence!) merge-conflict awaiting-author 130/59 Mathlib/Order/Lattice.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/GCongr/ForwardAttr.lean,MathlibTest/GCongr/inequalities.lean 4 17 ['Vierkantor', 'github-actions', 'hrmacbeth', 'leanprover-bot', 'leanprover-community-bot-assistant'] Vierkantor
assignee:Vierkantor
176-62481
5 months ago
176-62483
5 months ago
4-16654
4 days
20873 vbeffara
author:vbeffara
feat(Topology/Covering): path lifting and homotopy lifting This proves the existence and uniqueness of path and homotopy lifts through covering maps. --- I tried to separate as much of the proof as possible into separate PRs (which are already in Mathlib now), but the proof here relies on a monolithic construction of an explicit lift along a well-chosen subdivision, in `partial_lift`, with associated definitions. Only one standalone lean file added. An older WIP PR #10084 by Junyan Xu @alreadydone proves similar results using a very similar construction for path lifting, with a different argument to obtain continuity for homotopy lifting. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology merge-conflict awaiting-author 281/1 Mathlib.lean,Mathlib/Topology/Covering/Basic.lean,Mathlib/Topology/Covering/Lift.lean 3 9 ['alreadydone', 'github-actions', 'grunweg', 'vbeffara'] nobody
176-52677
5 months ago
176-52677
5 months ago
55-53553
55 days
22817 peabrainiac
author:peabrainiac
feat(CategoryTheory/Sites): local sites Defines local sites and shows that sheaves of types on them form a local topos, in that the global sections functor `Sheaf.Γ` has a right adjoint `Sheaf.codisc` that is fully faithful. --- - [x] depends on: #22816 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict WIP 263/0 Mathlib.lean,Mathlib/CategoryTheory/Limits/FunctorCategory/Shapes/Products.lean,Mathlib/CategoryTheory/Limits/Types.lean,Mathlib/CategoryTheory/Sites/GlobalSections.lean,Mathlib/CategoryTheory/Sites/LocalSite.lean,Mathlib/CategoryTheory/Sites/Sheaf.lean 6 4 ['github-actions', 'joelriou', 'mathlib4-dependent-issues-bot'] nobody
175-72686
5 months ago
175-76209
5 months ago
0-568
9 minutes
6252 michaellee94
author:michaellee94
feat(Geometry/Manifolds/Instances/Homeomorph): Homeomorphism maps `C^k` manifolds to `C^k` manifolds --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict WIP 116/0 Mathlib.lean,Mathlib/Geometry/Manifold/Instances/Graph.lean 2 2 ['leanprover-community-bot-assistant', 'michaellee94'] nobody
175-47142
5 months ago
175-47144
5 months ago
1-44375
1 day
16314 FR-vdash-bot
author:FR-vdash-bot
chore(Data/Quot): deprecate `ind*'` APIs --- - [x] depends on: #16264 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 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
171-74913
5 months ago
171-74915
5 months 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. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This includes part of #23750 t-data merge-conflict 22/66 Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/ENNReal/BigOperators.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean,Mathlib/MeasureTheory/Measure/Sub.lean,Mathlib/MeasureTheory/Measure/TightNormed.lean,Mathlib/Topology/MetricSpace/PartitionOfUnity.lean 7 22 ['eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'leanprover-community-mathlib4-bot', 'mattrobball', 'urkud'] nobody
171-58566
5 months ago
171-58568
5 months ago
14-12910
14 days
24060 eric-wieser
author:eric-wieser
chore(MeasureTheory): use `0` instead of `const _ 0` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability merge-conflict 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
171-48261
5 months ago
171-48263
5 months ago
0-0
0 seconds
11455 adomani
author:adomani
fix: unsqueeze simp, re Yaël's comments on #11259 This PR reverts/simplifies some of the "squeeze `simp`" changes in #11259. See #11259 for context. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 3/6 Mathlib/Algebra/Group/Conj.lean,Mathlib/Data/Seq/WSeq.lean 2 8 ['Ruben-VandeVelde', 'YaelDillies', 'grunweg', 'loefflerd', 'robertylewis', 'urkud'] nobody
171-20166
5 months ago
441-46756
1 year ago
91-14162
91 days
7325 eric-wieser
author:eric-wieser
chore: use preimageIso instead of defeq abuse for InducedCategory This makes a few things slightly more verbose, but the type casts are now explicit in those places. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-CI merge-conflict 22/21 Mathlib/CategoryTheory/EssentialImage.lean,Mathlib/CategoryTheory/Monoidal/Braided.lean,Mathlib/CategoryTheory/Monoidal/Subcategory.lean 3 1 ['grunweg'] nobody
171-20045
5 months ago
451-49130
1 year ago
0-0
0 seconds
7874 astrainfinita
author:astrainfinita
chore: make `IsScalarTower A A B` and `IsScalarTower A B B` higher priority --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) slow-typeclass-synthesis t-algebra awaiting-CI merge-conflict
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
171-20020
5 months ago
441-47015
1 year ago
0-0
0 seconds
5952 eric-wieser
author:eric-wieser
feat: add Qq wrappers for ToExpr --- - [ ] depends on: #6699 (to appease the linter) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-CI t-meta merge-conflict 247/150 Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Fin/VecNotation.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Tactic/DeriveToExpr.lean,Mathlib/Tactic/FBinop.lean,Mathlib/Tactic/ToExpr.lean,Mathlib/Util/Qq.lean,test/DeriveToExpr.lean,test/vec_notation.lean 9 7 ['eric-wieser', 'gebner', 'grunweg', 'leanprover-community-mathlib4-bot'] nobody
171-19846
5 months ago
451-49130
1 year ago
29-67421
29 days
15483 FR-vdash-bot
author:FR-vdash-bot
chore(GroupTheory/Coset): reduce defeq abuse --- - [x] depends on: #15482 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
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 ['FR-vdash-bot', 'eric-wieser', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mattrobball', 'mergify', 'urkud'] nobody
171-19806
5 months ago
419-58136
1 year ago
4-79214
4 days
16594 FR-vdash-bot
author:FR-vdash-bot
perf: reorder `extends` and remove some instances in algebra hierarchy --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) slow-typeclass-synthesis t-algebra merge-conflict
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 ['FR-vdash-bot', 'github-actions', 'grunweg', 'leanprover-bot'] nobody
171-19582
5 months ago
375-59129
1 year ago
14-58900
14 days
13780 adomani
author:adomani
deprecate injective --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 31/9 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,Mathlib/Init/Function.lean,lake-manifest.json,lakefile.lean 7 2 ['github-actions', 'grunweg'] nobody
170-73496
5 months ago
466-56840
1 year ago
0-0
0 seconds
11297 mattrobball
author:mattrobball
mrb/cover data fields --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 949/657 Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Associated.lean,Mathlib/Algebra/Category/MonCat/Colimits.lean,Mathlib/Algebra/Category/Ring/Colimits.lean,Mathlib/Algebra/DirectSum/Ring.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Field/IsField.lean,Mathlib/Algebra/Free.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Group/Aut.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Hom/Instances.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/Group/TypeTags.lean,Mathlib/Algebra/Group/Units.lean,Mathlib/Algebra/Group/WithOne/Defs.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/InjSurj.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Module/Basic.lean,Mathlib/Algebra/Module/Equiv.lean,Mathlib/Algebra/Module/LocalizedModule.lean,Mathlib/Algebra/Order/Group/Cone.lean,Mathlib/Algebra/Order/Interval.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Algebra/PEmptyInstances.lean,Mathlib/Algebra/Quandle.lean,Mathlib/Algebra/Ring/Aut.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Hom/Defs.lean,Mathlib/Algebra/Ring/InjSurj.lean,Mathlib/Algebra/Ring/Opposite.lean,Mathlib/Algebra/Ring/Pi.lean,Mathlib/Algebra/Ring/ULift.lean,Mathlib/Algebra/SMulWithZero.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/NormedSpace/ContinuousAffineMap.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Extension.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Basic.lean,Mathlib/Analysis/SpecialFunctions/PolarCoord.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Deriv.lean,Mathlib/CategoryTheory/Endomorphism.lean,Mathlib/CategoryTheory/Groupoid/VertexGroup.lean,Mathlib/CategoryTheory/Monoidal/Internal/Module.lean,Mathlib/Combinatorics/Quiver/SingleObj.lean,Mathlib/Combinatorics/Quiver/Symmetric.lean,Mathlib/Combinatorics/Young/YoungDiagram.lean,Mathlib/Control/Applicative.lean,Mathlib/Control/Basic.lean,Mathlib/Control/Functor.lean,Mathlib/Control/Monad/Cont.lean,Mathlib/Control/ULift.lean,Mathlib/Data/Erased.lean,Mathlib/Data/Int/Basic.lean,Mathlib/Data/Int/Cast/Prod.lean,Mathlib/Data/Nat/Basic.lean,Mathlib/Data/Nat/Cast/Defs.lean,Mathlib/Data/Nat/Order/Basic.lean,Mathlib/Data/Num/Lemmas.lean,Mathlib/Data/PSigma/Order.lean,Mathlib/Data/Prod/Lex.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Rat/Defs.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/Data/Sigma/Order.lean,Mathlib/Data/Sign.lean,Mathlib/Data/Sum/Lattice.lean,Mathlib/Data/Sum/Order.lean,Mathlib/Data/TwoPointing.lean,Mathlib/Data/ZMod/Defs.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/Opposite.lean,Mathlib/GroupTheory/GroupAction/Option.lean,Mathlib/GroupTheory/GroupAction/Prod.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/Pointwise.lean,Mathlib/GroupTheory/GroupAction/Units.lean,Mathlib/GroupTheory/MonoidLocalization.lean,Mathlib/GroupTheory/Perm/Basic.lean,Mathlib/GroupTheory/Subgroup/Basic.lean,Mathlib/GroupTheory/Submonoid/Operations.lean,Mathlib/GroupTheory/Submonoid/Pointwise.lean,Mathlib/GroupTheory/Subsemigroup/Operations.lean,Mathlib/Init/Data/Int/Order.lean,Mathlib/Init/Data/List/Instances.lean,Mathlib/Init/Data/Nat/Lemmas.lean,Mathlib/LinearAlgebra/AffineSpace/AffineMap.lean,Mathlib/LinearAlgebra/Basis.lean,Mathlib/Logic/Nontrivial/Basic.lean,Mathlib/Logic/Unique.lean,Mathlib/MeasureTheory/Integral/Bochner.lean 120 13 ['YaelDillies', 'grunweg', 'leanprover-bot', 'mattrobball'] nobody
170-73048
5 months ago
569-17320
1 year ago
0-0
0 seconds
12673 grunweg
author:grunweg
feat: add ContDiff.lipschitzOnWith A C¹ function is Lipschitz on each convex compact set. From sphere-eversion. -------- Commits can be reviewed independently. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict awaiting-author help-wanted 30/11 Mathlib/Analysis/Calculus/ContDiff/RCLike.lean 1 6 ['Ruben-VandeVelde', 'github-actions', 'grunweg', 'sgouezel'] nobody
169-42559
5 months ago
169-42559
5 months ago
1-7552
1 day
20567 grunweg
author:grunweg
feat(Cache): two small features - add an informational message to the get command (when run without arguments): when more than 80% of all cache files present were not used in the last command, tell the user about the `clean` command --- - [ ] depends on #20568 (for the first feature) - [ ] TODO: re-design this feature and the clean command: if there are N local copies of mathlib, cache should have a pointer to all of them - to avoid clearing all N-1 from inside the last local copy [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 38/2 Cache/Main.lean 1 11 ['Julian', 'arthurpaulino', 'fpvandoorn', 'github-actions', 'grunweg'] nobody
169-23909
5 months ago
169-23909
5 months ago
1-17369
1 day
20313 thefundamentaltheor3m
author:thefundamentaltheor3m
feat(Data/Complex/Exponential): prove some useful results about the complex exponential. This PR proves two basic results about the complex exponential: * `abs_exp_mul_I (x : ℂ) : abs (Complex.exp (I * x)) = Real.exp (-x.im)` * `one_sub_rexp_re_le_abs_one_sub_cexp (x : ℂ) : 1 - Real.exp x.re ≤ Complex.abs (1 - Complex.exp x)` Both results were proved as part of the sphere packing project. There's a chance they're too specific for mathlib, but I thought they were worth PRing anyway. Would it also be a good idea to tag `abs_exp_mul_I` with `simp`? Feedback/suggestions welcome. Note: `one_sub_rexp_re_le_abs_one_sub_cexp` was proved by Bhavik Mehta @b-mehta --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis merge-conflict 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
169-23875
5 months ago
169-23875
5 months ago
25-60481
25 days
22698 Kiolt
author:Kiolt
feat: notation for whisker(Left/Right)Iso From Toric --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) toric t-category-theory merge-conflict 175/113 Mathlib/Algebra/Homology/Monoidal.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Bicategory/Basic.lean,Mathlib/CategoryTheory/Bicategory/Coherence.lean,Mathlib/CategoryTheory/Bicategory/Extension.lean,Mathlib/CategoryTheory/Bicategory/Functor/Pseudofunctor.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Strong.lean,Mathlib/CategoryTheory/Bicategory/SingleObj.lean,Mathlib/CategoryTheory/Closed/Functor.lean,Mathlib/CategoryTheory/Closed/Ideal.lean,Mathlib/CategoryTheory/Enriched/FunctorCategory.lean,Mathlib/CategoryTheory/GradedObject/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Braided/Reflection.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Monoidal/Free/Coherence.lean,Mathlib/CategoryTheory/Monoidal/Preadditive.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,Mathlib/Tactic/CategoryTheory/BicategoricalComp.lean,Mathlib/Tactic/CategoryTheory/Bicategory/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Bicategory/Normalize.lean,Mathlib/Tactic/CategoryTheory/Bicategory/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/MonoidalComp.lean 27 21 ['Kiolt', 'YaelDillies', 'b-mehta', 'github-actions', 'leanprover-bot'] nobody
169-23704
5 months ago
169-23704
5 months ago
3-36238
3 days
21714 mattrobball
author:mattrobball
test t-order merge-conflict 13/13 Mathlib/Order/Hom/Lattice.lean,lean-toolchain 2 4 ['github-actions', 'leanprover-bot', 'mattrobball'] nobody
169-22553
5 months ago
169-22553
5 months ago
0-0
0 seconds
20730 kuotsanhsu
author:kuotsanhsu
feat(LinearAlgebra/Matrix/SchurTriangulation): prove Schur decomposition/triangulation `Matrix.schur_triangulation` shows that a matrix over an algebraically closed field is unitarily similar to an upper triangular matrix --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra merge-conflict awaiting-author
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
169-20007
5 months ago
169-20007
5 months ago
13-60072
13 days
19117 eric-wieser
author:eric-wieser
feat: derivatives of matrix operations These are finally possible to state after #19108. However, a lot of bundled `ContinuousLinearMap`s are missing. --- - [x] depends on: #19108 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict WIP 336/22 Mathlib.lean,Mathlib/Analysis/Calculus/Deriv/Matrix.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Matrix.lean 4 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
167-42385
5 months ago
167-42387
5 months ago
0-0
0 seconds
12605 FR-vdash-bot
author:FR-vdash-bot
chore: attribute [induction_eliminator] Add attribute [induction_eliminator] to `AdjoinRoot.induction_on` `ENat.recTopCoe` `ENNReal.recTopCoe` `Finset.induction` `Magma.AssocQuotient.induction_on` `ManyOneDegree.ind_on` `Module.Ray.ind` (and add `Orientation.ind` for `Orientation`, an abbrev of it. I wish that we do not need to add it in the future.) `Multiset.induction` `MvPolynomial.induction_on` `OnePoint.rec` `Opposite.rec'` `Ordinal.limitRecOn` `PartENat.casesOn` `Polynomial.induction_on'` `QuotientAddGroup.induction_on'` (and add `AddCircle.induction_on` for `AddCircle`, an abbrev of it. I wish that we do not need to add it in the future.) `QuotientGroup.induction_on'` (doesn't actually work) `Real.Angle.induction_on` `SimplexCategory.rec` `Trunc.induction_on` --- - [x] depends on: #13476 - [x] depends on: #13264 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 354/342 Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Group/Finset.lean,Mathlib/Algebra/BigOperators/Group/Multiset.lean,Mathlib/Algebra/BigOperators/Ring.lean,Mathlib/Algebra/GCDMonoid/Finset.lean,Mathlib/Algebra/GCDMonoid/Multiset.lean,Mathlib/Algebra/Group/Subgroup/Finite.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Lie/Weights/Basic.lean,Mathlib/Algebra/Module/BigOperators.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Derivation.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Order/ToIntervalMod.lean,Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Algebra/Polynomial/Degree/Lemmas.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Eval.lean,Mathlib/Algebra/Polynomial/Induction.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Polynomial/PartialFractions.lean,Mathlib/Algebra/Polynomial/Smeval.lean,Mathlib/Algebra/Tropical/BigOperators.lean,Mathlib/AlgebraicTopology/DoldKan/NCompGamma.lean,Mathlib/AlgebraicTopology/SimplexCategory.lean,Mathlib/AlgebraicTopology/SplitSimplicialObject.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Asymptotics/Asymptotics.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/Deriv/Polynomial.lean,Mathlib/Analysis/Convex/Combination.lean,Mathlib/Analysis/Convex/Exposed.lean,Mathlib/Analysis/Fourier/AddCircle.lean,Mathlib/Analysis/NormedSpace/Exponential.lean,Mathlib/Analysis/NormedSpace/Multilinear/Basic.lean,Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean,Mathlib/Analysis/SpecialFunctions/Complex/Circle.lean,Mathlib/Analysis/SpecialFunctions/Log/Base.lean,Mathlib/Analysis/SpecialFunctions/PolynomialExp.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Subobject/Lattice.lean,Mathlib/Combinatorics/Additive/PluenneckeRuzsa.lean,Mathlib/Combinatorics/SetFamily/Compression/Down.lean,Mathlib/Combinatorics/SetFamily/FourFunctions.lean,Mathlib/Combinatorics/SetFamily/HarrisKleitman.lean,Mathlib/Computability/Reduce.lean,Mathlib/Data/DFinsupp/Basic.lean,Mathlib/Data/DFinsupp/WellFounded.lean,Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finset/Lattice.lean,Mathlib/Data/Finset/NAry.lean,Mathlib/Data/Fintype/Sum.lean,Mathlib/Data/Multiset/Antidiagonal.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Multiset/Bind.lean,Mathlib/Data/Multiset/Fold.lean,Mathlib/Data/Multiset/Lattice.lean,Mathlib/Data/Multiset/Pi.lean,Mathlib/Data/Multiset/Powerset.lean,Mathlib/Data/Multiset/Sections.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Set/Pointwise/BigOperators.lean,Mathlib/FieldTheory/IntermediateField.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/Geometry/Manifold/Algebra/Monoid.lean,Mathlib/Geometry/RingedSpace/Basic.lean,Mathlib/Geometry/RingedSpace/OpenImmersion.lean,Mathlib/Geometry/RingedSpace/PresheafedSpace/Gluing.lean,Mathlib/GroupTheory/Coset.lean,Mathlib/GroupTheory/NoncommPiCoprod.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean,Mathlib/LinearAlgebra/Determinant.lean,Mathlib/LinearAlgebra/Eigenspace/Basic.lean,Mathlib/LinearAlgebra/FiniteDimensional.lean,Mathlib/LinearAlgebra/LinearIndependent.lean,Mathlib/LinearAlgebra/Matrix/Determinant/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Orientation.lean,Mathlib/LinearAlgebra/Projectivization/Basic.lean,Mathlib/LinearAlgebra/Ray.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/Logic/Hydra.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Basic.lean,Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/MeasureTheory/Integral/Lebesgue.lean,Mathlib/MeasureTheory/Integral/Marginal.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean,Mathlib/MeasureTheory/Measure/AddContent.lean 140 14 ['FR-vdash-bot', 'YaelDillies', 'eric-wieser', 'github-actions', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
167-37000
5 months ago
453-50926
1 year ago
4-46495
4 days
15099 joelriou
author:joelriou
feat(CategoryTheory/Sites): the Mayer-Vietoris long exact sequence in sheaf cohomology In this PR, we obtain the long exact Mayer-Vietoris sequence in sheaf cohomology `... ⟶ H^n₀(S.X₄, F) ⟶ H^n₀(S.X₂, F) ⊞ H^n₀(S.X₃, F) ⟶ H^n₀(S.X₁, F) ⟶ H^n₁(S.X₄, F) ⟶ ...` when `n₀ + 1 = n₁`. It is attached to any "Mayer-Vietoris square", which includes the typical case of a covering by two open subsets in a topological space. (This API shall also apply to the case of Nisnevich distinguished squares of schemes.) --- - [x] depends on: #15770 - [x] depends on: #14793 - [x] depends on: #14515 - [x] depends on: #15092 - [x] depends on: #15053 - [x] depends on: #14867 - [x] depends on: #14959 - [x] depends on: #14957 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict WIP 348/4 Mathlib.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Biprod.lean,Mathlib/CategoryTheory/Preadditive/Opposite.lean,Mathlib/CategoryTheory/Shift/Basic.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/CategoryTheory/Sites/SheafCohomology/Basic.lean,Mathlib/CategoryTheory/Sites/SheafCohomology/MayerVietoris.lean 8 n/a ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
164-66847
5 months ago
unknown
unknown
23859 urkud
author:urkud
feat(Topology/../Order/Field): generalize to `Semifield` .. from a linear ordered field to a linear ordered semifield--- - [ ] depends on: #23857 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 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
164-62823
5 months ago
164-62826
5 months ago
0-265
4 minutes
23810 b-reinke
author:b-reinke
chore(Order/Interval): generalize succ/pred lemmas to partial orders Many lemmas in `Mathlib/Order/Interval/Set/SuccPred.lean`and `Mathlib/Order/Interval/Finset/SuccPred.lean` also work for partial orders. They are generalized in this PR by introducing different sections for `PartialOrder` and `LinearOrder` assumptions in the respective files. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict 231/89 Mathlib/Order/Interval/Finset/SuccPred.lean,Mathlib/Order/Interval/Set/SuccPred.lean 2 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
162-39598
5 months ago
162-39600
5 months ago
16-29623
16 days
24285 madvorak
author:madvorak
chore(Algebra/*-{Category,Homology}): remove unnecessary universe variables Discussions: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Call.20for.20help.3A.20technical.2F.20organisational.20debt/with/513620128 https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Algebra.20and.20.60Type*.60/with/513558902 https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Task.2026.3A.20Replace.20Type.20u.20by.20Type*.20wherever.20possible/with/513592993 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
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
162-28295
5 months ago
162-28296
5 months ago
2-12022
2 days
8370 eric-wieser
author:eric-wieser
refactor(Analysis/NormedSpace/Exponential): remove the `𝕂` argument from `exp` This argument is still needed for almost all the lemmas, which means it can longer be found by unification. We keep around `expSeries 𝕂 A`, as it's needed for talking about the radius of convergence over different base fields. This is a prerequisite for #8372, as we can't merge the functions until they have the same interface.\ Zulip thread: [#mathlib4 > Real.exp @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Real.2Eexp/near/401602245) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This is started from the mathport output on https://github.com/leanprover-community/mathlib/pull/19244 awaiting-zulip t-analysis merge-conflict 432/387 Mathlib/Analysis/CStarAlgebra/Exponential.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/Exponential.lean,Mathlib/Analysis/Normed/Algebra/MatrixExponential.lean,Mathlib/Analysis/Normed/Algebra/QuaternionExponential.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/TrivSqZeroExt.lean,Mathlib/Analysis/NormedSpace/DualNumber.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog.lean,Mathlib/Analysis/SpecialFunctions/Exponential.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Series.lean 11 29 ['YaelDillies', 'eric-wieser', 'girving', 'github-actions', 'j-loreaux', 'kbuzzard', 'leanprover-community-bot-assistant', 'urkud'] nobody
162-9225
5 months ago
173-37855
5 months ago
29-60989
29 days
14931 eric-wieser
author:eric-wieser
feat: volume of a simplex --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry merge-conflict 207/0 Mathlib/Geometry/Euclidean/Basic.lean,Mathlib/Geometry/Euclidean/Circumcenter.lean,Mathlib/Geometry/Euclidean/Volume.lean 3 3 ['eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] nobody
160-40752
5 months ago
160-40754
5 months ago
0-0
0 seconds
22583 imathwy
author:imathwy
feat: affinespace homeomorphism There exists a homeomorphism (a continuous bijection with a continuous inverse) between an affine subspace s of a vector space V over a field 𝕜 and its direction s.direction , given a chosen point z ∈ s . --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author
label:t-algebra$
64/2 Mathlib/Analysis/Normed/Group/AddTorsor.lean,Mathlib/LinearAlgebra/AffineSpace/ContinuousAffineEquiv.lean,Mathlib/Topology/Algebra/ConstMulAction.lean,Mathlib/Topology/Algebra/MulAction.lean 4 6 ['JovanGerb', 'eric-wieser', 'github-actions', 'grunweg'] nobody
160-38470
5 months ago
200-83563
6 months ago
0-18122
5 hours
24243 Timeroot
author:Timeroot
feat(Analysis/Calculus/FDeriv): Fderiv on torsors Experiment to see how this goes for now, see [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Upgrade.20.60fderiv.60.20to.20.60AddTorsor.60) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict 539/447 Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Prod.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Bilinear.lean,Mathlib/Analysis/Calculus/FDeriv/Equiv.lean,Mathlib/Analysis/Calculus/FDeriv/Linear.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Calculus/FDeriv/Mul.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/Gradient/Basic.lean,Mathlib/Analysis/Calculus/LineDeriv/Basic.lean,Mathlib/Analysis/Calculus/LocalExtr/Basic.lean,Mathlib/Analysis/Calculus/ParametricIntegral.lean,Mathlib/Analysis/Calculus/Rademacher.lean,Mathlib/Analysis/Calculus/TangentCone.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Complex/Periodic.lean,Mathlib/Analysis/Complex/RealDeriv.lean,Mathlib/Analysis/MellinTransform.lean,Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/SpecialFunctions/ExpDeriv.lean,Mathlib/Analysis/SpecialFunctions/Exponential.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/EulerSineProd.lean,Mathlib/Geometry/Manifold/IntegralCurve/Transform.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/MFDeriv/Basic.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean,Mathlib/NumberTheory/EulerProduct/ExpLog.lean,Mathlib/NumberTheory/Harmonic/GammaDeriv.lean,Mathlib/NumberTheory/LSeries/Nonvanishing.lean,MathlibTest/Recall.lean 37 3 ['github-actions', 'leanprover-community-bot-assistant'] nobody
159-21608
5 months ago
159-21609
5 months ago
0-0
0 seconds
24322 mattrobball
author:mattrobball
chore: merge repeated `Type*` binders Per the discussion on [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Task.2026.3A.20Replace.20Type.20u.20by.20Type*.20wherever.20possible), this PR merges `(A : Type*) (B : Type u)` into `(A B : Type*)` and similarly for `{}`. NOTE: the Python script used it currently in the `/scripts` folder. It is there for inspection and should be removed before merging this PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 685/591 Archive/Imo/Imo2019Q2.lean,Archive/Wiedijk100Theorems/HeronsFormula.lean,Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Pi.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/Faithful.lean,Mathlib/Algebra/Group/Action/Sigma.lean,Mathlib/Algebra/Group/Hom/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Submonoid/MulAction.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/Subsemigroup/Basic.lean,Mathlib/Algebra/Group/Subsemigroup/Defs.lean,Mathlib/Algebra/Group/Subsemigroup/Operations.lean,Mathlib/Algebra/Group/Support.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LinearMap/Prod.lean,Mathlib/Algebra/Module/Prod.lean,Mathlib/Algebra/Module/Submodule/EqLocus.lean,Mathlib/Algebra/Module/Submodule/Equiv.lean,Mathlib/Algebra/Module/Submodule/Ker.lean,Mathlib/Algebra/Module/Submodule/LinearMap.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Algebra/Module/Submodule/Range.lean,Mathlib/Algebra/MonoidAlgebra/Grading.lean,Mathlib/Algebra/MonoidAlgebra/MapDomain.lean,Mathlib/Algebra/MonoidAlgebra/ToDirectSum.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Comap.lean,Mathlib/Algebra/MvPolynomial/Monad.lean,Mathlib/Algebra/Notation/Prod.lean,Mathlib/Algebra/Order/Quantale.lean,Mathlib/Algebra/Prime/Lemmas.lean,Mathlib/Algebra/Quandle.lean,Mathlib/Algebra/QuaternionBasis.lean,Mathlib/Algebra/Ring/CompTypeclasses.lean,Mathlib/Algebra/Ring/Hom/Defs.lean,Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/Algebra/Star/Module.lean,Mathlib/Algebra/TrivSqZeroExt.lean,Mathlib/Algebra/Vertex/HVertexOperator.lean,Mathlib/Algebra/Vertex/VertexOperator.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Asymptotics/Defs.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Asymptotics/Theta.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Integral.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/FDeriv/Mul.lean,Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean,Mathlib/Analysis/Convex/Cone/Proper.lean,Mathlib/Analysis/Convex/EGauge.lean,Mathlib/Analysis/Convex/Exposed.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Defs.lean,Mathlib/Analysis/InnerProductSpace/LinearMap.lean,Mathlib/Analysis/InnerProductSpace/Orthonormal.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/WeakOperatorTopology.lean,Mathlib/Analysis/LocallyConvex/WeakOperatorTopology.lean,Mathlib/Analysis/Normed/Affine/Isometry.lean,Mathlib/Analysis/Normed/Algebra/Basic.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/Normed/Ring/InfiniteSum.lean,Mathlib/Analysis/Normed/Ring/Lemmas.lean,Mathlib/Analysis/NormedSpace/ConformalLinearMap.lean,Mathlib/Analysis/NormedSpace/ENormedSpace.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Bilinear.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog.lean,Mathlib/Analysis/SpecificLimits/Basic.lean,Mathlib/CategoryTheory/Action/Concrete.lean,Mathlib/CategoryTheory/GradedObject.lean 343 3 ['github-actions', 'leanprover-community-bot-assistant', 'urkud'] nobody
159-21086
5 months ago
159-21088
5 months ago
2-7052
2 days
23138 grunweg
author:grunweg
feat: (unoriented) bordism groups We define the unoriented bordism group of a topological space and prove that it is an abelian group: we don't prove transitivity of bordisms yet, as that requires the collar neighbourhood theorem and gluing of smooth manifolds, which are both not in mathlib and a sizable piece of work. --- This PR is not ready for review yet; I'm merely opening this to track this branch' state better. In particular, this PR depends on several preliminary PRs: - depends on: #15906 for defining singular n-manifolds - depends on: #23040: define immersions and smooth embeddings: in finite dimensions, these are easy to describe; for mathlib, we will want a correct definition for e.g. Banach manifolds also. - depends on: #22059 defines manifolds with smooth boundary. That PR has two open dependencies; one is slowly getting merged, that other has a few sorries I still need to prove (not difficult). - depends on: #22874 for some constructions - defining unoriented bordisms, and proving some basic constructions about them: will be another PR [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict WIP 1316/3 Mathlib.lean,Mathlib/Geometry/Manifold/Bordisms.lean,Mathlib/Geometry/Manifold/Diffeomorph.lean,Mathlib/Geometry/Manifold/HasSmoothBoundary.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean 7 0 [] nobody
158-55980
5 months ago
196-32261
6 months ago
0-1
1 second
23593 erdOne
author:erdOne
feat(AlgebraicGeometry): the tilde construction is functorial --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry merge-conflict awaiting-author 95/38 Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean 2 4 ['chrisflav', 'github-actions', 'leanprover-community-bot-assistant'] nobody
158-55666
5 months ago
158-55668
5 months ago
0-71091
19 hours
21065 eric-wieser
author:eric-wieser
feat: generalize `tangentConeAt.lim_zero` to TVS ... and then adjust the `variable`s down the rest of the file to make use of the generality. There are two key lemmas that this does not generalize, which would probably unlock the rest of the file: * `subset_tangentCone_prod_left` (and `_right`) * `zero_mem_tangentCone` --- - [ ] depends on: #20859 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict WIP 55/28 Mathlib/Analysis/Calculus/TangentCone.lean 1 16 ['ADedecker', 'eric-wieser', 'github-actions', 'j-loreaux', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'urkud'] nobody
158-48070
5 months ago
158-48072
5 months ago
23-20319
23 days
22721 grunweg
author:grunweg
chore(MeasureTheory/Function/LpSeminorm/Basic): generalise more results to enorm classes Done for the Carleson project. --- - depends on #22708 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) carleson t-measure-probability merge-conflict WIP 134/10 Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
157-40738
5 months ago
157-40740
5 months ago
0-6
6 seconds
24354 grunweg
author:grunweg
chore(HasFiniteIntegral): rename three lemmas Discovered in #24343. --- - [ ] depends on: #24343 (to avoid merge conflicts) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability merge-conflict 108/30 Mathlib/MeasureTheory/Function/L1Space/HasFiniteIntegral.lean 1 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
157-32699
5 months ago
157-32700
5 months ago
0-4604
1 hour
23791 SEU-Prime
author:SEU-Prime
Create AmiceTrans.lean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-number-theory merge-conflict WIP 2963/0 Mathlib.lean,Mathlib/Analysis/Normed/Ring/Lemmas2.lean,Mathlib/NumberTheory/Padics/AmiceTrans.lean,Mathlib/NumberTheory/Padics/PSAC.lean,Mathlib/NumberTheory/Padics/PSAC2.lean,Mathlib/NumberTheory/Padics/PSAC3.lean,Mathlib/NumberTheory/Padics/PiGammainPS.lean,Mathlib/NumberTheory/Padics/PsiandVar.lean,Mathlib/RingTheory/AdicCompletion/Lemma.lean,Mathlib/RingTheory/PowerSeries/Comp.lean,Mathlib/Topology/ContinuousMap/ZeroAtBot.lean 11 3 ['SEU-Prime', 'github-actions', 'leanprover-community-bot-assistant'] nobody
156-80019
5 months ago
163-59025
5 months ago
0-0
0 seconds
24091 mattrobball
author:mattrobball
test merge-conflict 97/46 Mathlib/Algebra/Field/Defs.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/LocallyConvex/Basic.lean,Mathlib/Analysis/Normed/Affine/AddTorsor.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Module/Span.lean,Mathlib/Analysis/Normed/MulAction.lean,Mathlib/Analysis/NormedSpace/Pointwise.lean,Mathlib/Dynamics/BirkhoffSum/NormedSpace.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/Topology/ContinuousMap/Compact.lean,Mathlib/Topology/MetricSpace/Holder.lean,Mathlib/Topology/MetricSpace/HolderNorm.lean,docs/overview.yaml,docs/undergrad.yaml 15 5 ['github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
156-69437
5 months ago
156-69439
5 months ago
0-0
0 seconds
14731 adomani
author:adomani
feat: the repeated typeclass assumption linter [#mathlib4 > recyclable variables @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/recyclable.20variables/near/451167963) also [#mathlib4 > Normed modules @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Normed.20modules/near/512242167) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-linter merge-conflict WIP 178/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/DependentTypeclass.lean,MathlibTest/DependentTypeclass.lean 5 3 ['github-actions', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
156-45977
5 months ago
168-63379
5 months ago
0-109
1 minute
24140 mattrobball
author:mattrobball
test merge-conflict 176/91 Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/AlgebraicGeometry/AffineSpace.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/Analysis/CStarAlgebra/Classes.lean,Mathlib/Data/Complex/Module.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Coeff.lean,Mathlib/NumberTheory/NumberField/ProductFormula.lean,Mathlib/RingTheory/Algebraic/Integral.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/Localization/Integral.lean,Mathlib/RingTheory/RingHom/Unramified.lean,Mathlib/RingTheory/Spectrum/Prime/ChevalleyComplexity.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 17 5 ['github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
156-44440
5 months ago
156-44442
5 months ago
0-0
0 seconds
13649 FR-vdash-bot
author:FR-vdash-bot
chore: redefine `Nat.div2` `Nat.bodd` The new definitions are faster than the old ones. `Nat.binaryRec` will be moved to batteries (https://github.com/leanprover-community/batteries/pull/799) or core (https://github.com/leanprover/lean4/pull/3756), so relevant contents are moved to a new file temporarily. --- - [x] depends on: #15567 - [x] depends on: #19666 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 63/88 Mathlib/Computability/Primrec.lean,Mathlib/Data/Int/Bitwise.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Size.lean,Mathlib/Logic/Denumerable.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Nat.lean 8 15 ['FR-vdash-bot', 'digama0', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'urkud'] digama0
assignee:digama0
154-11845
5 months ago
154-11847
5 months ago
87-51692
87 days
22856 mattrobball
author:mattrobball
test merge-conflict 8/2 Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/RCLike/Inner.lean,Mathlib/FieldTheory/Galois/Profinite.lean 4 5 ['github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
153-85806
5 months ago
153-85808
5 months ago
0-0
0 seconds
23921 alreadydone
author:alreadydone
Jyxu/projective trace --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict WIP
label:t-algebra$
157/123 Mathlib/FieldTheory/CardinalEmb.lean,Mathlib/FieldTheory/Relrank.lean,Mathlib/LinearAlgebra/Contraction.lean,Mathlib/LinearAlgebra/Dual.lean,Mathlib/RingTheory/LocalProperties/Projective.lean 5 1 ['leanprover-community-bot-assistant'] nobody
153-71022
5 months ago
153-71022
5 months ago
0-0
0 seconds
21252 ADedecker
author:ADedecker
feat: redefine uniformly convex normed spaces with filters instead of epsilons And conceptualize some proofs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology merge-conflict
label:t-algebra$
301/87 Mathlib/Analysis/Convex/Uniform.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Order/Basic.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Topology/Algebra/UniformGroup/Defs.lean,Mathlib/Topology/Algebra/UniformMulAction.lean 6 1 ['github-actions'] nobody
153-70761
5 months ago
153-70761
5 months ago
0-0
0 seconds
19821 eric-wieser
author:eric-wieser
feat: add a Qq version of AtomM that groups by type --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-meta merge-conflict WIP 332/30 Mathlib/Data/Ineq.lean,Mathlib/Tactic/Linarith/Datatypes.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm.lean,Mathlib/Tactic/Linarith/Preprocessing.lean,Mathlib/Util/AtomM.lean,Mathlib/Util/Qq.lean 6 1 ['github-actions'] nobody
153-70574
5 months ago
153-70574
5 months ago
0-0
0 seconds
19520 erdOne
author:erdOne
refactor(Algebra/Module): Redefine `LocalizedModule` in terms of `OreLocalization` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
610/493 Mathlib.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean,Mathlib/GroupTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/Localization/BaseChange.lean,Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/OreLocalization/Module.lean,Mathlib/RingTheory/OreLocalization/Ring.lean 10 1 ['github-actions'] nobody
153-70563
5 months ago
153-70563
5 months ago
8-56155
8 days
19120 hrmacbeth
author:hrmacbeth
feat: stop `ring`/`abel` from seeing algebraic operations inside `let`s This draft PR illustrates a feature I would like to see in core: a variant of `whnf` which allows particular kinds of reduction, such as zeta-delta reduction, to be turned off. Here it is used to make ring-normalization and abelian-group-normalization a bit more responsive to what (I think) users expect: these normalizations would no longer look inside user-defined lets to see algebraic operations in those expressions. Note: In Lean/Mathlib 3, `ring` matched for algebraic operations on an algebraic expression `e` itself, not on `← whnfR e`. So mathlib3 `ring` didn't see algebraic operations inside `let`s -- but it also didn't see algebraic operations requiring beta-reduction (like `(fun t ↦ t + 1) x`) or see inside abbreviations. [Zulip](https://leanprover.zulipchat.com/#narrow/channel/239415-metaprogramming-.2F-tactics/topic/whnf.20variant.20which.20preserves.20let-bindings) Update: fortuitously, it looks like the new core PR https://github.com/leanprover/lean4/pull/6053 will provide this feature! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict blocked-by-core-PR 137/15 Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2008Q2.lean,Mathlib.lean,Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/SpecialFunctions/Gamma/BohrMollerup.lean,Mathlib/Analysis/SpecialFunctions/Integrals.lean,Mathlib/Analysis/SpecialFunctions/Stirling.lean,Mathlib/Data/Real/Pi/Irrational.lean,Mathlib/NumberTheory/LSeries/HurwitzZetaOdd.lean,Mathlib/NumberTheory/SumPrimeReciprocals.lean,Mathlib/RingTheory/WittVector/DiscreteValuationRing.lean,Mathlib/Tactic/Abel.lean,Mathlib/Tactic/Polyrith.lean,Mathlib/Tactic/Ring/Basic.lean,Mathlib/Tactic/Ring/RingNF.lean,Mathlib/Topology/MetricSpace/GromovHausdorff.lean,Mathlib/Util/WHNF.lean,MathlibTest/abel.lean,MathlibTest/ring.lean 21 5 ['JovanGerb', 'github-actions', 'grunweg', 'hrmacbeth'] nobody
153-70554
5 months ago
153-70554
5 months ago
0-0
0 seconds
17069 yuma-mizuno
author:yuma-mizuno
chore(CategoryTheory/Functor/Basic): put `simp` at `Functor.id_comp` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict 41/30 Mathlib/CategoryTheory/Adjunction/Mates.lean,Mathlib/CategoryTheory/Functor/Basic.lean,Mathlib/CategoryTheory/GuitartExact/VerticalComposition.lean,Mathlib/CategoryTheory/Limits/HasLimits.lean,Mathlib/CategoryTheory/Shift/CommShift.lean 5 3 ['github-actions', 'leanprover-bot', 'yuma-mizuno'] nobody
153-70544
5 months ago
153-70544
5 months ago
0-0
0 seconds
15024 mattrobball
author:mattrobball
chore(Algebra.Basic): scope and rename universal `Nat`-algebra and `Int`-algebra instances We rename `algebraNat` to `Nat.instAlgebraOfSemiring` and `algebraInt` to `Int.instAlgebraOfRing` to be consistent with existing naming conventions. We also scope them to avoid typeclass search tripping over them unnecessarily. --- Moves: - algebraNat -> Nat.instAlgebraOfSemiring - algebraInt -> Int.instAlgebraOfRing [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
178/27 Archive/Wiedijk100Theorems/AbelRuffini.lean,Counterexamples/Pseudoelement.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Unitization.lean,Mathlib/Algebra/Category/ModuleCat/Injective.lean,Mathlib/Algebra/FreeAlgebra.lean,Mathlib/Algebra/Module/Bimodule.lean,Mathlib/Algebra/Module/Zlattice/Basic.lean,Mathlib/Algebra/MvPolynomial/Counit.lean,Mathlib/Algebra/MvPolynomial/Supported.lean,Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Polynomial/DenomsClearable.lean,Mathlib/Algebra/Polynomial/UnitTrinomial.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Metric.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Topology.lean,Mathlib/Data/Matrix/Kronecker.lean,Mathlib/Data/Real/Irrational.lean,Mathlib/FieldTheory/IsAlgClosed/Classification.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Basic.lean,Mathlib/LinearAlgebra/FreeModule/IdealQuotient.lean,Mathlib/LinearAlgebra/FreeProduct/Basic.lean,Mathlib/LinearAlgebra/Matrix/Adjugate.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/TensorAlgebra/Basic.lean,Mathlib/NumberTheory/ClassNumber/AdmissibleCardPowDegree.lean,Mathlib/NumberTheory/ClassNumber/Finite.lean,Mathlib/NumberTheory/Cyclotomic/Basic.lean,Mathlib/NumberTheory/Cyclotomic/Discriminant.lean,Mathlib/NumberTheory/Cyclotomic/Rat.lean,Mathlib/NumberTheory/FLT/Three.lean,Mathlib/NumberTheory/LegendreSymbol/QuadraticChar/GaussSum.lean,Mathlib/NumberTheory/Liouville/Basic.lean,Mathlib/NumberTheory/Liouville/LiouvilleNumber.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/Defs.lean,Mathlib/NumberTheory/ModularForms/Identities.lean,Mathlib/NumberTheory/ModularForms/JacobiTheta/OneVariable.lean,Mathlib/NumberTheory/ModularForms/SlashActions.lean,Mathlib/NumberTheory/ModularForms/SlashInvariantForms.lean,Mathlib/NumberTheory/MulChar/Lemmas.lean,Mathlib/NumberTheory/NumberField/Basic.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/Basic.lean,Mathlib/NumberTheory/NumberField/ClassNumber.lean,Mathlib/NumberTheory/NumberField/Discriminant.lean,Mathlib/NumberTheory/NumberField/Embeddings.lean,Mathlib/NumberTheory/NumberField/FractionalIdeal.lean,Mathlib/NumberTheory/NumberField/Norm.lean,Mathlib/NumberTheory/NumberField/Units/DirichletTheorem.lean,Mathlib/RepresentationTheory/Maschke.lean,Mathlib/RingTheory/Adjoin/Basic.lean,Mathlib/RingTheory/Adjoin/FG.lean,Mathlib/RingTheory/AlgebraTower.lean,Mathlib/RingTheory/Discriminant.lean,Mathlib/RingTheory/FractionalIdeal/Norm.lean,Mathlib/RingTheory/Ideal/Norm.lean,Mathlib/RingTheory/IntegralClosure/IsIntegralClosure/Basic.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/FractionRing.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Eval.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Expand.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Roots.lean,Mathlib/RingTheory/Polynomial/GaussLemma.lean,Mathlib/RingTheory/Polynomial/Hermite/Gaussian.lean,Mathlib/RingTheory/Polynomial/Pochhammer.lean,Mathlib/RingTheory/RootsOfUnity/Lemmas.lean,Mathlib/RingTheory/RootsOfUnity/Minpoly.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/Trace/Basic.lean,Mathlib/RingTheory/WittVector/Basic.lean,Mathlib/RingTheory/WittVector/Defs.lean,Mathlib/RingTheory/WittVector/Frobenius.lean,Mathlib/RingTheory/WittVector/InitTail.lean,Mathlib/RingTheory/WittVector/IsPoly.lean,Mathlib/RingTheory/WittVector/MulP.lean,Mathlib/RingTheory/WittVector/StructurePolynomial.lean,Mathlib/RingTheory/WittVector/Verschiebung.lean 80 6 ['eric-wieser', 'github-actions', 'leanprover-bot', 'mattrobball'] nobody
153-70533
5 months ago
153-70533
5 months ago
0-0
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14803 StevenClontz
author:StevenClontz
chore: use `Disjoint` nhd filters for all separation axioms --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 157/122 Mathlib/Topology/Separation.lean 1 1 ['github-actions'] nobody
153-70528
5 months ago
153-70529
5 months ago
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14675 adomani
author:adomani
dev: the repeated variable linter --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict WIP 71/0 Mathlib/Tactic/Linter/Lint.lean 1 1 ['github-actions'] nobody
153-70523
5 months ago
153-70523
5 months ago
0-8
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14330 Ruben-VandeVelde
author:Ruben-VandeVelde
chore: split Mathlib.Algebra.Star.Basic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 446/331 Mathlib.lean,Mathlib/Algebra/Module/LinearMap/Star.lean,Mathlib/Algebra/Star/Basic.lean,Mathlib/Algebra/Star/BigOperators.lean,Mathlib/Algebra/Star/Defs.lean,Mathlib/Algebra/Star/Lemmas.lean,Mathlib/Algebra/Star/Order.lean,Mathlib/Algebra/Star/Pi.lean,Mathlib/Algebra/Star/Pointwise.lean,Mathlib/Algebra/Star/Rat.lean,Mathlib/Algebra/Star/Regular.lean,Mathlib/Algebra/Star/StarRingHom.lean,Mathlib/Analysis/NormedSpace/LinearIsometry.lean,Mathlib/Data/Complex/Basic.lean,scripts/noshake.json 15 3 ['github-actions', 'grunweg', 'j-loreaux'] nobody
153-70483
5 months ago
153-70509
5 months ago
0-45204
12 hours
14023 mattrobball
author:mattrobball
perf(RingTheory.OreLocalization): make data irreducible We generally do not want to unfold operations passing through `Quotient` if we can avoid it for performance reasons. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 43/32 Mathlib/GroupTheory/MonoidLocalization.lean,Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/OreLocalization/Ring.lean 3 5 ['github-actions', 'grunweg', 'leanprover-bot', 'mattrobball'] nobody
153-70378
5 months ago
461-60201
1 year ago
0-0
0 seconds
14007 adomani
author:adomani
test: papercut linter working on all mathlib This PR is a testing ground for potential issues with the papercut linter #13999. It is not intended to be merged. The linter is active on all of mathlib, to make sure that the linter does not throw errors, but only emits warnings! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict WIP 249/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/Papercut.lean,test/Papercut.lean 5 1 ['github-actions'] nobody
153-70368
5 months ago
153-70368
5 months ago
0-0
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20354 eric-wieser
author:eric-wieser
feat: generalize `ContinuousLinearMap.curry` to TVS Follow on from #10777 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict 57/25 Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean 1 3 ['eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] nobody
153-70303
5 months ago
153-70303
5 months ago
0-0
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11523 thorimur
author:thorimur
bench: test syntax linter --- The purpose of this PR is just to bench the "best-case scenario" for a linter which iterates through syntax, updating and checking a simple counter along the way. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict 22/0 Mathlib.lean,Mathlib/Command/Linter.lean,Mathlib/Tactic/Common.lean 3 3 ['grunweg', 'leanprover-bot', 'thorimur'] nobody
153-70212
5 months ago
153-70212
5 months ago
0-0
0 seconds
8511 eric-wieser
author:eric-wieser
refactor(MeasureTheory/Measure/Haar/Basic): partially generalize to the affine case Without a `Mul` version of `AddTorsor`, this generalization can only go so far. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability merge-conflict awaiting-author 52/46 Mathlib/MeasureTheory/Measure/Haar/Basic.lean 1 0 [] nobody
153-70114
5 months ago
153-70114
5 months ago
0-0
0 seconds
7994 ericrbg
author:ericrbg
chore: generalize `LieSubalgebra.mem_map_submodule` --- Not sure if we should rename to something like `mem_map_iff_mem_map_submodule` or not. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict please-adopt
label:t-algebra$
16/4 Mathlib/Algebra/Lie/SkewAdjoint.lean,Mathlib/Algebra/Lie/Subalgebra.lean 2 3 ['eric-wieser', 'ericrbg'] nobody
153-70102
5 months ago
153-70102
5 months ago
0-0
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6317 eric-wieser
author:eric-wieser
refactor(Data/Finsupp/Defs): make Finsupp.single defeq to Pi.single By adding a `DecidableEq ι` argument to `Finsupp.single`, we remove the reference to `Classical.decEq ι` in the definition, which in turn means that when coerced to a function it is now defeq to `Pi.single`. This also brings it in line with `DFinsupp.single`. This does not go as far as making `Finsupp.single` computable. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict WIP 269/226 Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Data/Finsupp/AList.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Finsupp/Fintype.lean,Mathlib/Data/Finsupp/Indicator.lean,Mathlib/Data/Finsupp/Multiset.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Finsupp/ToDFinsupp.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/LinearAlgebra/Basis.lean,Mathlib/LinearAlgebra/Finsupp.lean 12 0 [] nobody
153-70096
5 months ago
153-70096
5 months ago
0-0
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6277 jjaassoonn
author:jjaassoonn
Dimension theory Some results are - The ring Krull dimension and the topological dimension of the prime spectrum of a ring are the same - A field is zero-dimensional and a PID that is not a field is one dimensional - An Artinian ring is zero-dimensional - The Krull dimension of ring $R$ is equal to the supremum of heights of maximal ideals [00KG](https://stacks.math.columbia.edu/tag/00KG) - two definitions of module length agree - A module is finite length iff both artinian and noetherian - length of module $M$ is equal to the sum of length of $N$ and length of $M / N$ where $N$ is a submodule of $M$. - Noetherian ring has only finitely many minimal primes #9088 - In a zero dimensional ring, prime ideals are maximal - Artinian rings has finitely many maximal ideals #9087 - zero-dimensional rings with finitely many prime ideals are products of its localizations: $R \cong \prod_{\mathfrak{p}}R_{\mathfrak{p}}$ - Let $M_0 \le ... \le M_n$, then $l(M_n/ M_0) = l(M_1/M_0) + l(M_2/M_1) + ... + l(M_n/M_{n-1})$ where $l$ denotes module length. - If $f : R \to S$ is a ring homomorphism and $M$ an $S$-module, then $l_R(M) \le l_S(M)$, when $f$ is surjective then they are equal. (Note that this is expressed using `[Algebra R S]` and `RestrictScalars R S M`, instead of a literal ring hom) - Artinian rings are noetherian ring of dimension 0. - For 0-dimensional local ring, its maximal ideal is locally nilpotent - In notherian ring, $I \le \sqrt{J}$ implies $I ^ n \le J$ for some $n$ --- - [x] depends on: #6309 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
3289/459 Mathlib.lean,Mathlib/Algebra/Module/Length.lean,Mathlib/Algebra/Module/Submodule/JordanHolder.lean,Mathlib/Algebra/PUnitInstances.lean,Mathlib/AlgebraicGeometry/PrimeSpectrum/ArtinianAndNoetherian.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Dedup.lean,Mathlib/Data/List/Nodup.lean,Mathlib/LinearAlgebra/Quotient.lean,Mathlib/Order/Cover.lean,Mathlib/Order/JordanHolder.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Order/ListOnPartialOrderTypes.lean,Mathlib/Order/Monotone/Basic.lean,Mathlib/Order/RelSeries.lean,Mathlib/RingTheory/Artinian.lean,Mathlib/RingTheory/Finiteness.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Pi.lean,Mathlib/RingTheory/KrullDimension.lean,Mathlib/RingTheory/Noetherian.lean,Mathlib/RingTheory/SimpleModule.lean,Mathlib/Topology/KrullDimension.lean,Mathlib/Topology/Sheaves/SheafCondition/EqualizerProducts.lean 24 11 ['alreadydone', 'jjaassoonn', 'leanprover-community-mathlib4-bot'] nobody
153-70091
5 months ago
585-40104
1 year ago*
0-0
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4979 mhk119
author:mhk119
doc(Data/Nat/Bitblast): initial commit Initial commit of Bitblast.lean where we prove equivalence of bitblast unsigned less than and bitblast addition. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 202/4 Mathlib/Data/Bool/Basic.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Pow.lean 3 49 ['ChrisHughes24', 'digama0', 'goens', 'grunweg', 'j-loreaux', 'kim-em', 'mhk119'] nobody
153-70080
5 months ago
153-70080
5 months ago
7-68358
7 days
8536 jjaassoonn
author:jjaassoonn
characteristic predicate of tensor product --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
399/7 Mathlib/Algebra/Category/AlgebraCat/Monoidal.lean,Mathlib/LinearAlgebra/IsTensorProduct.lean,Mathlib/LinearAlgebra/TensorProduct.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean 4 12 ['alreadydone', 'eric-wieser', 'jjaassoonn'] nobody
153-70044
5 months ago
153-70044
5 months ago
0-0
0 seconds
11524 mcdoll
author:mcdoll
refactor: Introduce type-class for SchwartzMap --- There are a lot of other refactors to do (`seminormAux` should have a nicer name and gobble up more theorems from `seminorm`), then one can prove `integrable` and friends with only `SchwartzMapClass`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict WIP 139/137 Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/Fourier/PoissonSummation.lean,Mathlib/Topology/ContinuousFunction/ZeroAtInfty.lean 3 0 [] nobody
153-70010
5 months ago
153-70010
5 months ago
0-0
0 seconds
9819 jjaassoonn
author:jjaassoonn
fg graded ring 1. if $A$ is a noetherian graded ring, then $A_0$ is a noetherian subring of $A$ and $A$ is a finitely generated algebra over $A_0$, if $M$ is a finitely generated graded module over $A$, then each $M_n$ is a finitely generated module over $A_0$. 2. Definition of additive functions over any abelian category: if $C$ is an abelian category, a function $f : C \to \mathbb Z$ is said to be additive, if $f(y) = f(x) + f(z)$ whenever $0\to x \to y \to z \to 0$ is exact. proved some basic properties such as $f(0) = 0$ and $f(x) = f(y)$ whenever $x \cong y$ and interaction of $f$ with longer exact sequences 3. The category of finitely generated module over noetherian ring is abelian 4. A proof of Hilbert-Serre theorem: the Poincare series is actually of the form $\frac{p}{\prod(1- X^i)}$ where $p$ is polynomial The code works, but poorly written. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict WIP
label:t-algebra$
6745/217 Mathlib.lean,Mathlib/Algebra/Category/FGModuleCat/Abelian.lean,Mathlib/Algebra/Category/FGModuleCat/Basic.lean,Mathlib/Algebra/Category/FGModuleCat/EpiMono.lean,Mathlib/Algebra/Category/FGModuleCat/Kernels.lean,Mathlib/Algebra/Category/FGModuleCat/Limits.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/HilbertSerre/AdditiveFunction.lean,Mathlib/Algebra/HilbertSerre/FiniteInstances.lean,Mathlib/Algebra/HilbertSerre/HilbertPolynomial.lean,Mathlib/Algebra/HilbertSerre/Theorem.lean,Mathlib/Algebra/Module/GradeZeroModule.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/RingTheory/FiniteType.lean,Mathlib/RingTheory/Finiteness.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousIdeal.lean,Mathlib/RingTheory/GradedAlgebra/Noetherian.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean,Mathlib/RingTheory/GradedAlgebra/Subgrading.lean,Mathlib/RingTheory/Polynomial/Hilbert.lean,Mathlib/RingTheory/PowerSeries/Basic.lean,Mathlib/RingTheory/PowerSeries/WellKnown.lean 25 n/a ['FMLJohn', 'github-actions'] nobody
153-69992
5 months ago
unknown
unknown
13543 adomani
author:adomani
test: automatically undeprecate A test for `update_deprecations`. There are two files with deprecated declarations, but CI automatically fixes them, so that they pass the noisy tests (as well as passing fail-on-warning `lake build`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict 345/4 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/UpdateDeprecations.lean,Mathlib/test_depr.lean,Mathlib/test_depr_no_change.lean,lakefile.lean,scripts/update_deprecations.lean,test/UpdateDeprecations.lean 12 0 [] nobody
153-69843
5 months ago
153-69843
5 months ago
0-0
0 seconds
14932 eric-wieser
author:eric-wieser
chore: add nndist versions of lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict 108/1 Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Geometry/Euclidean/Basic.lean 2 1 ['github-actions'] nobody
153-69656
5 months ago
153-69656
5 months ago
0-0
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22269 Thmoas-Guan
author:Thmoas-Guan
chore(Algebra): replace Submodule.quotient.mk with Submodule.mkQ Replace Submodule.quotient.mk with Submodule.mkQ as much as possible as it have better composition property and more direct lemmas, making it more similarly with `Ideal.Quotient.mk` (except Algebra.Lie.Quotient.Basic for ones more familiar with these area) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author
label:t-algebra$
431/218 Mathlib/Algebra/Exact.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/LocalizedModule/Submodule.lean,Mathlib/Algebra/Module/PID.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/LinearAlgebra/Dimension/Constructions.lean,Mathlib/LinearAlgebra/Dimension/RankNullity.lean,Mathlib/LinearAlgebra/Dual/Lemmas.lean,Mathlib/LinearAlgebra/Isomorphisms.lean,Mathlib/LinearAlgebra/Projection.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/LinearAlgebra/Quotient/Defs.lean,Mathlib/LinearAlgebra/Quotient/Pi.lean,Mathlib/LinearAlgebra/SModEq.lean,Mathlib/LinearAlgebra/Semisimple.lean,Mathlib/LinearAlgebra/TensorProduct/Quotient.lean,Mathlib/LinearAlgebra/TensorProduct/RightExactness.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/RepresentationTheory/GroupCohomology/LowDegree.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Exactness.lean,Mathlib/RingTheory/AdicCompletion/Functoriality.lean,Mathlib/RingTheory/Flat/FaithfullyFlat/Basic.lean,Mathlib/RingTheory/Ideal/Colon.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/RingTheory/Ideal/Quotient/Defs.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/PowerBasis.lean,Mathlib/RingTheory/QuotSMulTop.lean,Mathlib/RingTheory/Smooth/Basic.lean,Mathlib/RingTheory/TensorProduct/Quotient.lean 33 10 ['Thmoas-Guan', 'alreadydone', 'erdOne', 'github-actions', 'grunweg', 'leanprover-bot'] nobody
152-62395
4 months ago
152-62395
4 months ago
16-61571
16 days
18202 ADedecker
author:ADedecker
chore: refactor algebraic filter bases --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology merge-conflict
label:t-algebra$
1086/1315 Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/LocallyConvex/AbsConvex.lean,Mathlib/Analysis/LocallyConvex/Barrelled.lean,Mathlib/Analysis/LocallyConvex/WeakDual.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Normed/Operator/WeakOperatorTopology.lean,Mathlib/FieldTheory/KrullTopology.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/Module/UniformConvergence.lean,Mathlib/Topology/Algebra/Nonarchimedean/AdicTopology.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/UniformFilterBasis.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean 14 1 ['github-actions'] nobody
152-62327
4 months ago
152-62327
4 months ago
0-0
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23546 JovanGerb
author:JovanGerb
feat(LinearAlgebra/AffineSpace/AffineSubspace): rename `AffineSubspace.mk'` to `Submodule.shift` In addition to renaming, I've refactored the code a bit: - `mem_mk'_iff_vsub_mem` was obsolete since it was the same as `mem_mk'`, so I removed it (this is due to a change in the definition I made recently) - I added a nonempty instance for `shift` - I added a simp lemma that `shift` isn't equal to `⊥` (the empty affine subspace). I need this for the next point. - Edit: I'll leave this for a later PR. ~I proved a simp lemma that a `shift` is parallel to a `shift` if and only if the linear subspaces are the same.~ - I renamed `mk'_eq` to `shift_direction_eq_self `. - I renamed `eq_or_eq_secondInter_of_mem_mk'_span_singleton_iff_mem` to `eq_or_eq_secondInter_iff_mem_of_mem_shift_span_singleton`. I think it is better to put the `of_mem_mk'_span_singleton` at the end of the name. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry merge-conflict 128/99 Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Geometry/Euclidean/Basic.lean,Mathlib/Geometry/Euclidean/MongePoint.lean,Mathlib/Geometry/Euclidean/PerpBisector.lean,Mathlib/Geometry/Euclidean/Sphere/SecondInter.lean,Mathlib/Geometry/Euclidean/Sphere/Tangent.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Defs.lean 7 4 ['JovanGerb', 'github-actions', 'leanprover-community-bot-assistant'] nobody
152-44827
4 months ago
152-44828
4 months ago
26-25420
26 days
19315 quangvdao
author:quangvdao
feat(Data/Finsupp/Fin): Add `Finsupp` operations on `Fin` tuple This PR adds more analogues of operations on `Fin` tuples to the `Finsupp` setting. Before, there were only `Finsupp.cons` and `Finsupp.tail`. Now there are also `Finsupp.snoc`, `Finsupp.insertNth`, `Finsupp.init`, and `Finsupp.removeNth`. These all come with supporting lemmas. I also removed the porting comment about `succAboveCases` in `Data/Fin/Basic`, and added a lemma about `succAbove` in `Data/Fin/Tuple/Basic`. --- - [x] depends on: #20361 - [x] depends on: #20771 - [x] depends on: #20770 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict awaiting-author 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
150-19086
4 months ago
150-19086
4 months ago
43-81255
43 days
19464 adomani
author:adomani
test: removed merge-conflict --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI merge-conflict delegated WIP 22/1 .github/workflows/PR_summary.yml,scripts/zulip_emoji_merge_delegate.py 2 10 ['adomani', 'github-actions', 'leanprover-community-bot-assistant'] nobody
149-30410
4 months ago
149-30412
4 months ago
0-0
0 seconds
7907 urkud
author:urkud
feat: introduce `NthRoot` notation class Also use it for `Real.sqrt`, and replace the few occurrences of `sqrt` that do not already use the notation. --- [Zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/.60Sqrt.60.20notation.20typeclass/near/400086502) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-analysis awaiting-CI merge-conflict
label:t-algebra$
193/156 Archive/Imo/Imo1959Q2.lean,Archive/Imo/Imo1960Q2.lean,Archive/Imo/Imo2001Q2.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2008Q4.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Mathlib.lean,Mathlib/Algebra/NthRoot.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/Complex/AbelLimit.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/SpecialFunctions/Pow/Asymptotics.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Analysis/SpecialFunctions/Stirling.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Bounds.lean,Mathlib/Data/Real/GoldenRatio.lean,Mathlib/Data/Real/Sqrt.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/MeasureTheory/Measure/Lebesgue/VolumeOfBalls.lean,Mathlib/NumberTheory/Harmonic/GammaDeriv.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/ConvexBody.lean,Mathlib/NumberTheory/NumberField/ClassNumber.lean,Mathlib/NumberTheory/NumberField/Discriminant/Basic.lean,Mathlib/Probability/Distributions/Gaussian.lean,MathlibTest/positivity.lean 28 9 ['eric-wieser', 'github-actions', 'kmill', 'urkud'] nobody
148-46200
4 months ago
402-59758
1 year ago
0-0
0 seconds
9273 grunweg
author:grunweg
feat: extended charts are local diffeomorphisms on their source --- TODO: I think this should hold at any interior point - as the inverse of the extended chart, restricted to the interior of its source, will be a local inverse. The analogous result for un-extended charts is shown in #8160. Unresolved questions - are all the tiny API lemmas useful; are any more missing? - do I want similar results for `extChartAt`? (In any case, they are easy to deduce.) - [ ] depends on: #8738 for simplicity [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict 225/12 Mathlib/Geometry/Manifold/ContMDiff/Atlas.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Topology/Algebra/Module/Basic.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
148-20235
4 months ago
unknown
unknown
24642 grunweg
author:grunweg
WIP-feat: add layercake formula for ENNReal-valued functions Not much to see here yet; some significant amount of work remains. --- - [ ] depends on: #24643 - [ ] depends on: #24640 (based on that PR for simplicity) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) carleson t-analysis merge-conflict WIP 189/24 Mathlib/Analysis/SpecialFunctions/Pow/Integral.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Integral/Layercake.lean 4 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
144-39085
4 months ago
144-39088
4 months ago
0-0
0 seconds
21712 grunweg
author:grunweg
chore: generalise more lemmas to `ContinuousENorm` --- - [x] depends on: #21781 (minor drive-by clean-up) - [x] depends on: #21670 - [x] depends on: #22708 (extracted from this) - some parts depend on #21433 (or better: #22175); when the dependent PR has landed, I will re-assess whether to split these into a separate PR [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) carleson t-measure-probability awaiting-CI merge-conflict 76/31 Mathlib/Analysis/Normed/MulAction.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/ContinuousFunctions.lean 4 5 ['github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
143-60769
4 months ago
153-70803
5 months ago
0-0
0 seconds
21375 grunweg
author:grunweg
WIP: generalise lemmas to ENorm This work is part of (and a necessary pre-requisite for) the Carleson project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) carleson t-measure-probability awaiting-CI merge-conflict WIP 471/221 Mathlib/Analysis/NormedSpace/IndicatorFunction.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/ChebyshevMarkov.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Trim.lean,Mathlib/MeasureTheory/Function/LpSpace.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/Probability/Independence/Integrable.lean 13 2 ['fpvandoorn', 'grunweg'] nobody
143-55144
4 months ago
153-70798
5 months ago
0-0
0 seconds
24378 urkud
author:urkud
feat(Algebra/Order/Field/Basic): generalize lemmas ... from linear ordered semifields to (commutative) groups with zero. --- I'm going to do another round of generalizing today or tomorrow, so making it a draft PR for now. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
183/181 Archive/OxfordInvariants/Summer2021/Week3P1.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semiring.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Basic.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/CStarAlgebra/ApproximateUnit.lean,Mathlib/Analysis/Calculus/BumpFunction/Basic.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/BumpFunction/InnerProduct.lean,Mathlib/Analysis/Complex/AbelLimit.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Convex/SpecificFunctions/Basic.lean,Mathlib/Analysis/Convex/SpecificFunctions/Pow.lean,Mathlib/Analysis/Convex/StrictConvexSpace.lean,Mathlib/Analysis/Convex/Uniform.lean,Mathlib/Analysis/Convex/Visible.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/FunctionalSpaces/SobolevInequality.lean,Mathlib/Analysis/MeanInequalitiesPow.lean,Mathlib/Analysis/Normed/Field/Lemmas.lean,Mathlib/Analysis/Normed/Field/Ultra.lean,Mathlib/Analysis/Normed/Unbundled/SmoothingSeminorm.lean,Mathlib/Analysis/NormedSpace/HomeomorphBall.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/NormedSpace.lean,Mathlib/Analysis/NormedSpace/Pointwise.lean,Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Beta.lean,Mathlib/Analysis/SpecialFunctions/Log/Deriv.lean,Mathlib/Analysis/SpecialFunctions/MulExpNegMulSqIntegral.lean,Mathlib/Analysis/SpecialFunctions/SmoothTransition.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Bounds.lean,Mathlib/Analysis/SpecificLimits/Basic.lean,Mathlib/Analysis/SpecificLimits/FloorPow.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/Combinatorics/Additive/AP/Three/Behrend.lean,Mathlib/Combinatorics/Schnirelmann.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Chunk.lean,Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Computability/AkraBazzi/GrowsPolynomially.lean,Mathlib/Data/Nat/Cast/Order/Field.lean,Mathlib/Data/Real/Archimedean.lean,Mathlib/Data/Real/Cardinality.lean,Mathlib/Data/Real/Pi/Wallis.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Affine.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/RightAngle.lean,Mathlib/Geometry/Euclidean/Sphere/Tangent.lean,Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Integral/CircleIntegral.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Integral/PeakFunction.lean,Mathlib/MeasureTheory/Measure/SeparableMeasure.lean,Mathlib/NumberTheory/Bertrand.lean,Mathlib/NumberTheory/ClassNumber/AdmissibleAbs.lean,Mathlib/NumberTheory/DiophantineApproximation/Basic.lean,Mathlib/NumberTheory/LSeries/Injectivity.lean,Mathlib/NumberTheory/LSeries/ZMod.lean,Mathlib/NumberTheory/NumberField/Discriminant/Basic.lean,Mathlib/NumberTheory/Padics/Hensel.lean,Mathlib/NumberTheory/Padics/MahlerBasis.lean,Mathlib/NumberTheory/Pell.lean,Mathlib/NumberTheory/Transcendental/Liouville/LiouvilleNumber.lean,Mathlib/Order/Filter/AtTopBot/Floor.lean,Mathlib/Order/Interval/Set/IsoIoo.lean,Mathlib/Probability/StrongLaw.lean,Mathlib/RingTheory/Perfection.lean,Mathlib/Topology/ContinuousMap/Polynomial.lean,Mathlib/Topology/Instances/AddCircle.lean,Mathlib/Topology/UrysohnsLemma.lean 72 3 ['github-actions', 'leanprover-community-bot-assistant'] nobody
143-39474
4 months ago
143-39476
4 months ago
0-0
0 seconds
13685 niklasmohrin
author:niklasmohrin
feat(Combinatorics): add definitions for network flows Although we might not have any super-interesting results ready for mathlib yet, I feel that the definitions from this commit are already mature enough to include. These definitions are ported from last semester's work we did at https://github.com/niklasmohrin/lean-seminar-2023 and I have put some time in to refactor our code to `Int` and now to any parameter `R`. In the linked repository, there is some more stuff that I can send in. One obstacle without integer values is that it is not clear why a maximum flow would exist. I think the best way to tackle this would be to prove max-flow-min-cut theorem and implement the Ford-Fulkerson algorithm. It has been pointed out on Zulip that there is an [Isabelle formalization of the Edmonds Karp Algorithm](https://www.isa-afp.org/entries/EdmondsKarp_Maxflow.html). I feel that the definitions are pretty solid and it makes sense to include them, even if just for unifying definitions across downstream projects. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics merge-conflict awaiting-author 244/0 Mathlib.lean,Mathlib/Combinatorics/Flow/Basic.lean,docs/references.bib 3 57 ['Shreyas4991', 'YaelDillies', 'b-mehta', 'github-actions', 'leanprover-community-bot-assistant', 'madvorak', 'niklasmohrin'] nobody
142-9323
4 months ago
142-9325
4 months ago
86-21072
86 days
15115 kkytola
author:kkytola
feat: Generalize assumptions in liminf and limsup results in ENNReals In a [review comment](https://github.com/leanprover-community/mathlib4/pull/13938#discussion_r1649744441) it was pointed out that results about liminf and limsup in ENNReal hold under milder assumptions. This PR does the generalization. --- This PR is split off from #13938, where the review comment was made. The changes needed for the suggested generalization were of different kind than the simple PR's content, justifying a separate PR. - [x] depends on: #13938 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order t-topology merge-conflict awaiting-author help-wanted 215/27 Mathlib/MeasureTheory/Measure/Portmanteau.lean,Mathlib/Order/LiminfLimsup.lean,Mathlib/Topology/Instances/ENNReal.lean 3 8 ['Ruben-VandeVelde', 'github-actions', 'grunweg', 'j-loreaux', 'kkytola', 'leanprover-community-mathlib4-bot'] nobody
141-51479
4 months ago
166-35783
5 months ago
21-25493
21 days
17129 joneugster
author:joneugster
feat(Tactic/Linter): add unicode linter for unicode variant-selectors Unicode characters can be followed by one of the two "variant-selectors" `\FE0E` (text) or `\FE0F` (emoji). These appear to the user as a single unicode character and they might copy them by accident. For example `✅️` (`\u2705\uFE0F`), `✅` (`\u2705`) and `✅︎` (`\u2705\uFE0E`) are three variants of the "same" unicode character. The one without variant-selector might display as either emoji or not, depending on the user's device and font. Add unicode linter ensuring variant-selector only appear on specified characters and also ensuring these characters always have the correct variant selector to avoid confusions. Everything flagged by this linter can be fixed fully automatically with `lake exe lint-style --fix` or by commenting `bot fix style` on the PR. --- - tracking PR: #16215 ## Zulip discussions: - https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Whitelist.20for.20Unicode.3F - https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Lean.20specific.20font ## Related PRs: - leanprover/lean4#5015 added some emoji-variant selectors to Emojis used in `Lean` itself. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-linter merge-conflict delegated awaiting-author 245/14 Mathlib.lean,Mathlib/GroupTheory/GroupExtension/Defs.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Linter/UnicodeLinter.lean,Mathlib/Tactic/Widget/Calc.lean,Mathlib/Tactic/Widget/CongrM.lean,Mathlib/Tactic/Widget/Conv.lean,Mathlib/Tactic/Widget/GCongr.lean,Mathlib/Topology/ContinuousMap/Weierstrass.lean,MathlibTest/LintStyleTextBased.lean 11 25 ['YaelDillies', 'adomani', 'github-actions', 'grunweg', 'joneugster', 'kim-em', 'leanprover-community-bot-assistant'] nobody
140-39985
4 months ago
140-39987
4 months ago
82-54712
82 days
17131 joneugster
author:joneugster
feat(Tactic/Linter): add unicode linter for unwanted characters Add unicode linter flagging bad unicode characters. In this first form, the linter only flags `\u00A0` (non-breaking space) and replaces it with a normal space. Non-breaking space has been chosen because they keep reappearing in mathlib and it seems to be uncontroversial to lint for these. The whitelist/blacklist could then be refined in future PRs. Everything flagged by this linter can be fixed fully automatically with `lake exe lint-style --fix` or by commenting `bot fix style` on the PR. --- - tracking PR: #16215 ## Zulip discussions: - https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Whitelist.20for.20Unicode.3F - https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Lean.20specific.20font [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-linter merge-conflict awaiting-author 112/8 Mathlib.lean,Mathlib/Algebra/Lie/Semisimple/Lemmas.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/CategoryTheory/Category/ReflQuiv.lean,Mathlib/LinearAlgebra/Vandermonde.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Linter/UnicodeLinter.lean 8 6 ['github-actions', 'grunweg', 'leanprover-community-bot-assistant'] adomani and grunweg
assignee:grunweg assignee:adomani
140-39984
4 months ago
140-39986
4 months ago
52-18594
52 days
8495 jjaassoonn
author:jjaassoonn
feat : Tensor-Hom adjunction in the category of modules # Tensor-Hom adjunction Let $R$ be a commutative ring and $S$ any ring. Let $X$ be an $(S,R)$-bimoule. Then the tensor functor $(X \otimes_R \cdot)$ is a functor from left $R$-modules to left $S$-modules; and the hom-functor $Hom_S(X, \cdot)$ is a functor from left $S$-modules to left $R$-modules. For another left $S$-module $Y$, the left $R$-module structure of $Hom_S(X, Y)$ is given by $s \cdot f := x \mapsto f(s \cdot x)$. These two functors are adjoint.. In particular we have that ```math {\rm Hom}_{S}(X\otimes_R Y, Z) \cong {\rm Hom}_R (Y, {\rm Hom}_S (X, Z)) ``` ## Implementation notes 1. Why not use the `Mathlib/LinearAlgebra/TensorProduct/Tower.lean` In our setting `X` is an `(R, S)` bimodule and `Y` an `R`-module and `Z` an `S`-module so to use the `Tower` file, we need `S` to be an `R`-algebra which is a luxury we do not have. But note that in `Tower` file, `curry` and `uncurry` are both tri-linear maps. So `Tower` file allows interplay of 3 rings which is not allowed in this file. 2. We require `R` to be commutative but we never used anything commutative. This is because of tensor product requires commutativity, but thanks to @alreadydone, this assumption could be removed soon. I think this PR should wait for Junyan's attempt on removing commutativity, so it is marked as draft and wip for now --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author WIP
label:t-algebra$
214/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/TensorHomAdjunction.lean 2 88 ['alreadydone', 'bustercopley', 'eric-wieser', 'github-actions', 'jjaassoonn', 'kbuzzard', 'kim-em', 'leanprover-community-bot-assistant'] eric-wieser
assignee:eric-wieser
139-46015
4 months ago
139-46016
4 months ago
0-0
0 seconds
19284 adomani
author:adomani
test: commit a change only to the "master" CI build action This PR should fail CI, since the main CI build file is incompatible with the autogenerated ones. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI merge-conflict awaiting-author 3/3 .github/build.in.yml,.github/workflows/actionlint.yml 2 12 ['adomani', 'bryangingechen', 'github-actions', 'jcommelin', 'leanprover-community-bot-assistant'] bryangingechen
assignee:bryangingechen
137-77419
4 months ago
137-77420
4 months ago
0-0
0 seconds
15651 TpmKranz
author:TpmKranz
feat(Computability/NFA): operations for Thompson's construction Lays the groundwork for a proof of equivalence of RE and NFA, w.r.t. described language. Actual connection to REs comes later, after the groundwork for the opposite direction has been laid. Third chunk of #12648 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-computability new-contributor merge-conflict awaiting-author 307/5 Mathlib/Computability/NFA.lean 1 15 ['TpmKranz', 'YaelDillies', 'dupuisf', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte'] nobody
137-39731
4 months ago
137-39732
4 months ago
45-84611
45 days
22361 rudynicolop
author:rudynicolop
feat(Computability/NFA): nfa closure properties Add the closure properties union, intersection and reversal for NFA. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-computability new-contributor merge-conflict awaiting-author 218/2 Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean 2 90 ['EtienneC30', 'b-mehta', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] EtienneC30
assignee:EtienneC30
137-38805
4 months ago
137-38807
4 months ago
39-67601
39 days
15254 yuma-mizuno
author:yuma-mizuno
feat(CategoryTheory/Monoidal): replace `Mon_` lemmas with `Mon_Class` lemmas We redefine algebras internal to monoidal categories, which were defined by full-bundled structures, in terms of semi-bundled type classes. The original full-bundled structure `X` is renamed to `X_Cat`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict WIP 3982/96 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Bimod_Class.lean,Mathlib/CategoryTheory/Monoidal/Bimon_.lean,Mathlib/CategoryTheory/Monoidal/Bimon_Class copy.lean,Mathlib/CategoryTheory/Monoidal/Bimon_Class.lean,Mathlib/CategoryTheory/Monoidal/Braided/Opposite.lean,Mathlib/CategoryTheory/Monoidal/CommMon_Class.lean,Mathlib/CategoryTheory/Monoidal/Comon_.lean,Mathlib/CategoryTheory/Monoidal/Comon_Class.lean,Mathlib/CategoryTheory/Monoidal/Internal/ModuleClass.lean,Mathlib/CategoryTheory/Monoidal/Mod_Class.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/Mon_Class.lean,Mathlib/CategoryTheory/Monoidal/mwe.lean 14 n/a ['YaelDillies', 'github-actions', 'leanprover-community-bot-assistant', 'yuma-mizuno'] nobody
134-16590
4 months ago
unknown
unknown
22837 joneugster
author:joneugster
feat(Data/Set/Basic): add subset_iff and not_mem_subset_iff Add `Set.subset_iff` for consistent API with `Finset.subset_iff`. Add `Set.not_mem_subset_iff` and `Finset.not_mem_subset_iff`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory t-data merge-conflict 9/0 Mathlib/Data/Finset/Defs.lean,Mathlib/Data/Set/Basic.lean 2 4 ['Ruben-VandeVelde', 'github-actions', 'joneugster', 'leanprover-community-bot-assistant'] nobody
131-47827
4 months ago
131-47829
4 months ago
30-35190
30 days
23489 plp127
author:plp127
chore: fix recursors Replace motive with `motive` and other improvements. Will probably split this PR after fixing is done. 4013 recursors left --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 4255/172 Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/Free.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Lie/BaseChange.lean,Mathlib/Algebra/Lie/IdealOperations.lean,Mathlib/Algebra/Lie/TraceForm.lean,Mathlib/Algebra/Order/Rearrangement.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/SubboxInduction.lean,Mathlib/CategoryTheory/Quotient.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Fin/Tuple/Basic.lean,Mathlib/Data/Fin/Tuple/BubbleSortInduction.lean,Mathlib/Data/Fin/Tuple/NatAntidiagonal.lean,Mathlib/Data/FinEnum/Option.lean,Mathlib/Data/Finset/Max.lean,Mathlib/Data/Fintype/CardEmbedding.lean,Mathlib/Data/Fintype/Option.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/Nat/BinaryRec.lean,Mathlib/Data/PFun.lean,Mathlib/Data/PFunctor/Multivariate/W.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Sym/Sym2.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Coprod/Basic.lean,Mathlib/GroupTheory/Coset/Defs.lean,Mathlib/GroupTheory/Coxeter/Basic.lean,Mathlib/LinearAlgebra/Span/Defs.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean,Mathlib/NumberTheory/LSeries/HurwitzZetaEven.lean,Mathlib/NumberTheory/LSeries/HurwitzZetaOdd.lean,Mathlib/Order/DirectedInverseSystem.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/SetTheory/Cardinal/Defs.lean,Mathlib/SetTheory/PGame/Algebra.lean,done.csv,print.lean,working.csv 42 3 ['github-actions', 'leanprover-community-bot-assistant'] nobody
131-47308
4 months ago
131-47309
4 months ago
0-0
0 seconds
24100 eric-wieser
author:eric-wieser
feat: restore some explicit binders from Lean 3 Part of #24099 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt merge-conflict awaiting-author 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
131-47183
4 months ago
131-47185
4 months ago
34-33204
34 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). --- - [ ] depends on: #24570 - [ ] depends on: #24953 (I did not test the last part.) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict 58/19 Mathlib/Tactic/Linter/TextBased.lean,scripts/lint-style.lean 2 19 ['Vierkantor', 'adomani', 'github-actions', 'grunweg', 'joneugster', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] joneugster
assignee:joneugster
130-53315
4 months ago
130-53318
4 months ago
43-17409
43 days
24163 urkud
author:urkud
refactor(TangentCone): redefine for TVS --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict 421/284 Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/TangentCone.lean,Mathlib/Topology/Algebra/ConstMulAction.lean 3 4 ['github-actions', 'leanprover-community-bot-assistant'] nobody
129-85032
4 months ago
129-85033
4 months ago
0-0
0 seconds
23349 BGuillemet
author:BGuillemet
feat: add LocallyLipschitzOn.lipschitzOnWith_of_isCompact and two small lemmas about Lipschitz functions Main feat (in Mathlib/Topology/EMetricSpace/Basic.lean): if a function `f` from an extended pseudometric space to a pseudometric space is locally Lipschitz on a compact subset `s`, then `f` is Lipschitz on `s`. The theorem is true only when the codomain of `f` is a pseudometric space, so it needs imports from Mathlib/Topology/MetricSpace. Other small feat (in Mathlib/Analysis/Calculus/ContDiff/RCLike.lean): a function that is continuously differentiable on an open subset is locally Lipschitz on this subset. --- - [ ] depends on: #22890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-topology merge-conflict 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
129-35045
4 months ago
129-35047
4 months ago
35-30364
35 days
23767 grunweg
author:grunweg
refactor: make library notes a definition Make library notes a definition of `Unit` type, whose doc-string is the note's content. As a consequence, - doc-gen will display all library notes without any custom logic, - library notes are shown upon hover (via the use of the doc-string), - go do definition for library notes is easy Automate this using a macro, which also enforces that all library notes are inside the Mathlib.LibraryNote namespace. *Temporarily*, we use the `library_note2` name; if/when the batteries version is changed, we can reclaim the original name. This PR does not address how to *refer* to library notes nicely (in a way that is shown in the documentation, checked for typos, with sufficient imports ensured etc.). That is left to a future PR. This is proposal 2a from this [zulip discussion]([#mathlib4 > library notes @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/library.20notes/near/510614740)) ------------ Open questions/TODOs: - should this go in batteries instead? can the old definition just be overwritten? - otherwise, what's the best place for the `LibraryNote` definition? A single file just for this feels overkill; I put it in Mathlib.Tactic.Basic for now. I could use Mathlib.Init, of course (but that might be excessive) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-meta merge-conflict 48/48 Archive/Imo/Imo2019Q2.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/Category/Ring/Limits.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Scalar.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/HierarchyDesign.lean,Mathlib/Algebra/Order/Hom/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Note.lean,Mathlib/Analysis/RCLike/Lemmas.lean,Mathlib/CategoryTheory/Category/Basic.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/Nat/Cast/Defs.lean,Mathlib/Data/Nat/Init.lean,Mathlib/Geometry/Manifold/Algebra/Monoid.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Logic/Basic.lean,Mathlib/Tactic/Basic.lean,Mathlib/Tactic/NormNum/Basic.lean,Mathlib/Tactic/Simps/Basic.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Continuous.lean 26 9 ['adomani', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
127-48140
4 months ago
127-48142
4 months ago
51-69759
51 days
12438 jjaassoonn
author:jjaassoonn
feat: some APIs for flat modules Need horseshoe lemma --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict WIP 1674/3 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Symmetric.lean,Mathlib/Algebra/Exact.lean,Mathlib/CategoryTheory/Abelian/Basic.lean,Mathlib/CategoryTheory/Abelian/DiagramLemmas/Horseshoe.lean,Mathlib/CategoryTheory/Abelian/LeftDerived.lean,Mathlib/RingTheory/Flat/Basic.lean 8 21 ['erdOne', 'github-actions', 'jjaassoonn', 'joelriou'] nobody
124-47671
4 months ago
510-65088
1 year ago
0-0
0 seconds
24965 erdOne
author:erdOne
refactor: Make `IsLocalHom` take unbundled map --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge t-algebra merge-conflict awaiting-author
label:t-algebra$
16/7 Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/AlgebraicGeometry/Scheme.lean,Mathlib/Geometry/RingedSpace/LocallyRingedSpace.lean,Mathlib/Geometry/RingedSpace/LocallyRingedSpace/HasColimits.lean,Mathlib/Geometry/RingedSpace/OpenImmersion.lean 5 6 ['alreadydone', 'erdOne', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] nobody
123-2026
4 months ago
123-2027
4 months ago
10-26015
10 days
8740 digama0
author:digama0
fix: improve `recall` impl / error reporting Simplifies the implementation of `recall`, fixing a bug [reported on Zulip](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/.60recall.60.20strangeness/near/405076713) and also eliminating a use of `open private`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-CI t-meta merge-conflict awaiting-author 27/39 Mathlib/Tactic/Recall.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
122-64932
4 months ago
122-64934
4 months ago
0-0
0 seconds
21182 joneugster
author:joneugster
fix(Util/CountHeartbeats): move elaboration in #count_heartbeats inside a namespace Currently the `#count_heartbeat` linter reported the heartbeats until it concluded `error: [declaration] has already been declared` instead of re-elaborating the declaration. --- [Zulip report](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/count_heartbeats.20for.20all.20declarations.20in.20a.20file.3F/near/496303652) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 72/5 Mathlib/Util/CountHeartbeats.lean,MathlibTest/CountHeartbeats.lean 2 17 ['adomani', 'github-actions', 'joneugster', 'leanprover-community-bot-assistant', 'mathlib-bors'] adomani
assignee:adomani
122-63793
4 months ago
122-63794
4 months ago
64-19141
64 days
17715 adomani
author:adomani
feat: the unusedVariableCommand linter This is still work-in-progress, but also help-wanted! The linter reliably flags unused variables: so far, only `example`s fool it (and that is simply because I did not implement a fix, as there are very few `variable`s that are only used in `example`s in mathlib). The work-in-progress part refers to the fact that the linter uses an `IO.Ref` to keep track of variables and this does not work well with editing the file. The linter works on a fresh parse of a file, but becomes out-of-sync with every edit. The help-wanted is to ask for help to make mathlib compliant with the linter, by checking out this branch and PR-ing a few variable removals! [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Unused.20variables) --- Known issues: * automatic namespacing and `nonrec` may cause difficulty when the newly introduced declaration is preferred in the term, rather than the original one (see examples here ```bash code -r -g ././././Mathlib/Analysis/SpecialFunctions/Arsinh.lean:183 code -r -g ././././Mathlib/Probability/Independence/Basic.lean:368 ``` where, for instance, `ContinuousOn.arsinh` is used internally instead of `Real.arsinh`). * `mutual` declarations confuse the linter ```bash code -r -g ././././Mathlib/SetTheory/Lists.lean:313 ``` * `code -r -g Mathlib/CategoryTheory/EffectiveEpi/Comp.lean:133:29` * universe annotations confuse the linter: ```bash code -r -g ././././Mathlib/Topology/Category/CompactlyGenerated.lean:53 code -r -g ././././Mathlib/AlgebraicTopology/CechNerve.lean:46 ``` * `inductive`s confusing the linter ```bash code -r -g ././././Mathlib/Deprecated/Subgroup.lean:389 code -r -g ././././Mathlib/FieldTheory/PerfectClosure.lean:55 ``` * `def`s confusing the linter ```bash code -r -g ././././Mathlib/Data/MLList/BestFirst.lean:104 ``` * special typeclass assumptions ```code code -r -g ././././Mathlib/RingTheory/WittVector/Truncated.lean:273 code -r -g ././././Mathlib/Topology/Category/Profinite/Product.lean:79 ``` * not sure what is going on here: ```bash code -r -g ././././Mathlib/RingTheory/WittVector/IsPoly.lean:95 code -r -g ././././Mathlib/Probability/Independence/Basic.lean:368 code -r -g ././././Mathlib/Analysis/Calculus/FDeriv/Star.lean:30 ``` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-linter merge-conflict 695/22 Mathlib.lean,Mathlib/Algebra/Group/Idempotent.lean,Mathlib/Algebra/GroupWithZero/Idempotent.lean,Mathlib/Data/Finite/Defs.lean,Mathlib/Data/Int/Cast/Field.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Init.lean,Mathlib/MeasureTheory/Function/LpSpace/DomAct/Continuous.lean,Mathlib/NumberTheory/LSeries/PrimesInAP.lean,Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/Order/BoundedOrder/Lattice.lean,Mathlib/Order/BoundedOrder/Monotone.lean,Mathlib/Order/Monotone/Monovary.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/UnusedVariableCommand.lean,MathlibTest/UnusedVariableCommand.lean,lakefile.lean 17 n/a ['github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
122-42429
4 months ago
unknown
unknown
23371 grunweg
author:grunweg
chore: mark `Disjoint.{eq_bot, inter_eq}` simp And add the analogous lemma to `Finset`. Spun out from #22964, hence transitively part of my bordism theory project. Some lemmas there are more conveniently stated with `Disjoint`, which requires tagging at least `inter_eq` with simp. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict awaiting-author 12/11 Mathlib/Data/Finset/Lattice/Basic.lean,Mathlib/Data/Finset/Lattice/Lemmas.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Disjoint.lean,Mathlib/Order/Disjoint.lean,Mathlib/Topology/Compactification/OnePoint.lean,Mathlib/Topology/Order/OrderClosed.lean 7 31 ['YaelDillies', 'eric-wieser', 'github-actions', 'grunweg', 'j-loreaux', 'leanprover-bot', 'leanprover-community-bot-assistant', 'leanprover-community-mathlib4-bot'] nobody
121-48154
3 months ago
121-48157
3 months ago
32-65400
32 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. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI merge-conflict 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
119-85052
3 months ago
119-85054
3 months ago
285-26861
285 days
16062 adomani
author:adomani
Test/ci olean size Tests for oleans --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI merge-conflict awaiting-author WIP 114/0 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,scripts/olean_comparison.sh 5 4 ['Parcly-Taxel', 'adomani', 'github-actions', 'leanprover-community-bot-assistant'] nobody
119-85052
3 months ago
119-85053
3 months ago
0-16
16 seconds
25507 eric-wieser
author:eric-wieser
chore(RingTheory/Valuation): golf using `Con` This has no particular motivation besides seeing if `Con` is a performant substitute. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) bench-after-CI t-algebra merge-conflict
label:t-algebra$
20/35 Mathlib/RingTheory/Valuation/ValuationRing.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
119-76531
3 months ago
119-76532
3 months ago
0-0
0 seconds
12799 jstoobysmith
author:jstoobysmith
feat(LinearAlgebra/UnitaryGroup): Add properties of Special Unitary Group Add properties of the special unitary group, mirroring the properties of found in Algebra/Star/Unitary.lean. In particular, I add an instance of `specialUnitaryGroup` as a `Group`, `Star`, `InvolutiveStar`, and `StarMul`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra merge-conflict please-adopt awaiting-author
label:t-algebra$
78/0 Mathlib/LinearAlgebra/UnitaryGroup.lean 1 8 ['chrisflav', 'jcommelin', 'leanprover-community-bot-assistant'] nobody
119-6998
3 months ago
119-7000
3 months ago
9-22007
9 days
23709 plp127
author:plp127
feat: `Nat.findFrom` This PR adds `Nat.findFrom`, which is like `Nat.find`, but starting from an arbitrary `k` instead of `0`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 190/47 Mathlib/Data/Nat/Find.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
118-58687
3 months ago
118-58689
3 months ago
62-25661
62 days
25340 dupuisf
author:dupuisf
chore(Analysis/Convex): move files pertaining to convex/concave functions to their own folder This PR creates a new folder under `Analysis/Convex` called `Analysis/Convex/Function`, which includes files that are mostly or entirely about convex/concave functions (as opposed to convex sets). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry merge-conflict 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
118-57872
3 months ago
118-57874
3 months ago
6-40169
6 days
13994 grunweg
author:grunweg
chore(Topology): replace continuity -> fun_prop Addresses a few porting notes; I expect also a substantial speed-up of some proofs. Change a few default values of proof fields from `continuity` to `fun_prop`; this required a few fix-ups downstream. (I checked a few instances; the failure seems related to `Continuous.subtype_mk` not always firing.) This is almost (but not fully) exhaustive. ---------- One proof gets partially un-automated (cont. -> partial fun_prop); if desired, I can revert this change. - [x] depends on: #11092 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 105/20 Mathlib/Analysis/Distribution/FourierSchwartz.lean,Mathlib/Analysis/Matrix.lean,Mathlib/Dynamics/Flow.lean,Mathlib/Geometry/RingedSpace/OpenImmersion.lean,Mathlib/Topology/Algebra/Field.lean,Mathlib/Topology/Algebra/Monoid.lean,Mathlib/Topology/Category/TopCat/Limits/Basic.lean,Mathlib/Topology/Category/TopCat/Limits/Pullbacks.lean,Mathlib/Topology/ContinuousMap/Basic.lean,Mathlib/Topology/ContinuousMap/Bounded/Basic.lean,Mathlib/Topology/ContinuousMap/Compact.lean,Mathlib/Topology/ContinuousMap/StoneWeierstrass.lean,Mathlib/Topology/ExtremallyDisconnected.lean,Mathlib/Topology/Homotopy/HomotopyGroup.lean,Mathlib/Topology/Homotopy/Path.lean,Mathlib/Topology/Instances/RealVectorSpace.lean,Mathlib/Topology/MetricSpace/Perfect.lean,Mathlib/Topology/UnitInterval.lean 18 12 ['MichaelStollBayreuth', 'github-actions', 'grunweg', 'j-loreaux', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
117-76545
3 months ago
393-9776
1 year ago
28-21477
28 days
21734 adomani
author:adomani
fix(PR summary): checkout GITHUB_SHA This should make the version of the script that is used on PRs more stable. Suggested by Eric Wieser on [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/messageFile.2Emd/near/498941855). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI merge-conflict awaiting-author WIP 2/1 .github/workflows/PR_summary.yml 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
117-74539
3 months ago
117-74541
3 months ago
0-6023
1 hour
13483 adomani
author:adomani
feat: automatically replace deprecations This PR introduces `lake exe update_deprecations` that uses the cache to automatically replace deprecated declarations with the corresponding un-deprecated one. The script handles namespacing, replacing a possibly non-fully-qualified, deprecated name with the fully-qualified non-deprecated name. It is also possible to use ```bash lake exe update_deprecations --mods One.Two.Three,Dd.Ee.Ff ``` to limit the scope of the replacements to the modules `One.Two.Three` and `Dd.Ee.Ff`. This is intended to be a first step in automating updates: combining this with a linter that emits appropriate warnings, the functionality of `lake exe update_deprecations` can be extended to perform more complicated updates. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict delegated awaiting-author 306/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/UpdateDeprecations.lean,MathlibTest/UpdateDeprecations.lean,lakefile.lean,scripts/README.md,scripts/update_deprecations.lean 7 16 ['YaelDillies', 'adomani', 'github-actions', 'j-loreaux', 'jcommelin', 'leanprover-community-bot-assistant', 'mathlib-bors', 'sgouezel'] joneugster
assignee:joneugster
115-6874
3 months ago
115-6875
3 months ago
34-82472
34 days
8949 sebzim4500
author:sebzim4500
Add `by_approx` tactic for proving real inequalities using rational approximation feat: Add `by_approx` tactic for proving real inequalities by finding rational approximations --- ```lean example : |sqrt 2 - 1.414| < 0.001 := by by_approx ``` This is a work in progress, the code is messy and the tactic is often very slow. It also depends on some other PRs that haven't been merged yet. It currently supports basic operations (`+`, `-`, `*`, `/`, `abs`) and has approximation extensions for `sqrt` and `exp`. - [ ] depends on: #8167 - [x] depends on: #8832 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict modifies-tactic-syntax 1670/3 Mathlib.lean,Mathlib/Data/Int/ModEq.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ByApprox.lean,Mathlib/Tactic/ByApprox/Basic.lean,Mathlib/Tactic/ByApprox/Core.lean,Mathlib/Tactic/ByApprox/Exp.lean,Mathlib/Tactic/ByApprox/Lemmas.lean,Mathlib/Tactic/ByApprox/Test.lean,Mathlib/Tactic/ByApprox/Util.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/GRW.lean,Mathlib/Tactic/GRW/Core.lean,Mathlib/Tactic/GRW/Lemmas.lean,Mathlib/Tactic/NormNum/NatFactorial.lean,test/ByApprox.lean,test/GRW.lean,test/norm_num_ext.lean 18 1 ['mathlib4-dependent-issues-bot'] nobody
114-12186
3 months ago
114-12188
3 months ago
0-0
0 seconds
20334 miguelmarco
author:miguelmarco
feat: allow polyrith to use a local Singular/Sage install Try to call a local install of Singular (either standalone or inside Sage) to find the witness for polyrith before trying to call the online sage cell server. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-meta merge-conflict awaiting-author 171/48 Mathlib/Tactic/Polyrith.lean,scripts/polyrith_sage.py 2 16 ['eric-wieser', 'github-actions', 'hanwenzhu', 'kim-em', 'miguelmarco', 'mkoeppe'] nobody
111-85951
3 months ago
231-63913
7 months ago
27-65384
27 days
23953 b-reinke
author:b-reinke
feat(Data/Matroid/Tutte): define the Tutte polynomial of a matroid This PR defines the Tutte polynomial of a matroid and shows basic properties. - [x] depends on: #23926 - [ ] depends on #24336 - [ ] depends on: #23951 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict WIP 111/0 Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Data/Matroid/Tutte/Basic.lean,Mathlib/Data/Set/Image.lean 3 7 ['apnelson1', 'b-reinke', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
109-41031
3 months ago
109-41033
3 months ago
0-0
0 seconds
18441 ADedecker
author:ADedecker
refactor(AdicTopology): use new API for algebraic filter bases, and factor some code --- - [x] depends on: #18437 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology merge-conflict
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
106-49613
3 months ago
106-49615
3 months ago
0-679
11 minutes
18439 ADedecker
author:ADedecker
refactor: use new algebraic filter bases API in `FiniteAdeleRing` --- - [x] depends on: #18437 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology merge-conflict
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
106-49611
3 months ago
106-49613
3 months ago
0-619
10 minutes
18438 ADedecker
author:ADedecker
refactor: adapt `KrullTopology` to the new algebraic filter bases API --- - [x] depends on: #18437 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology merge-conflict
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
106-49610
3 months ago
106-49611
3 months ago
0-638
10 minutes
13964 pechersky
author:pechersky
feat(Data/DigitExpansion): begin defining variant of reals without rationals Based on a de Bruijn 1976 paper. This file is just the basic definition of a digit expansion. Will be followed up with further constructions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 518/0 Mathlib.lean,Mathlib/Data/DigitExpansion/Defs.lean,docs/references.bib 3 11 ['eric-wieser', 'github-actions', 'kim-em', 'pechersky'] dupuisf
assignee:dupuisf
103-31901
3 months ago
341-58117
11 months ago
129-57991
129 days
26581 nomeata
author:nomeata
ignore this: Lean pr testing 9124 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1723/1362 Archive/Arithcc.lean,Archive/Examples/Eisenstein.lean,Archive/Examples/IfNormalization/WithoutAesop.lean,Archive/Imo/Imo1972Q5.lean,Archive/Imo/Imo1975Q1.lean,Archive/Imo/Imo1987Q1.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo1998Q2.lean,Archive/Imo/Imo2006Q5.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2024Q1.lean,Archive/Imo/Imo2024Q3.lean,Archive/Imo/Imo2024Q5.lean,Archive/MiuLanguage/DecisionNec.lean,Archive/MiuLanguage/DecisionSuf.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/AbelRuffini.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/AscendingDescendingSequences.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Archive/Wiedijk100Theorems/Partition.lean,Archive/Wiedijk100Theorems/PerfectNumbers.lean,Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Archive/ZagierTwoSquares.lean,Cache/Lean.lean,Counterexamples/AharoniKorman.lean,Counterexamples/CanonicallyOrderedCommSemiringTwoMul.lean,Counterexamples/CliffordAlgebraNotInjective.lean,Counterexamples/DiscreteTopologyNonDiscreteUniformity.lean,Counterexamples/MapFloor.lean,Counterexamples/MonicNonRegular.lean,Counterexamples/Phillips.lean,Counterexamples/Pseudoelement.lean,Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/Category/ContinuousCohomology/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Homology.lean,Mathlib/Algebra/Category/MonCat/FilteredColimits.lean,Mathlib/Algebra/Category/Ring/Epi.lean,Mathlib/Algebra/Category/Ring/FinitePresentation.lean,Mathlib/Algebra/Category/Ring/Topology.lean,Mathlib/Algebra/CharP/Basic.lean,Mathlib/Algebra/CharP/Defs.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/DirectSum/Ring.lean,Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/Equiv/TransferInstance.lean,Mathlib/Algebra/GCDMonoid/Finset.lean,Mathlib/Algebra/Group/Action/Basic.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Finset/Scalar.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Lie/CartanExists.lean,Mathlib/Algebra/Lie/LieTheorem.lean,Mathlib/Algebra/Lie/Weights/Chain.lean,Mathlib/Algebra/Lie/Weights/RootSystem.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/Presentation/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MonoidAlgebra/ToDirectSum.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Eval.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/NoZeroSMulDivisors/Defs.lean,Mathlib/Algebra/Order/Antidiag/Pi.lean,Mathlib/Algebra/Order/CauSeq/Completion.lean,Mathlib/Algebra/Order/Field/Power.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/Algebra/Polynomial/Degree/CardPowDegree.lean,Mathlib/Algebra/Polynomial/HasseDeriv.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Regular/Pi.lean,Mathlib/Algebra/Ring/Basic.lean,Mathlib/Algebra/Ring/CentroidHom.lean,Mathlib/Algebra/Ring/GrindInstances.lean,Mathlib/Algebra/Ring/Int/Defs.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean 567 n/a [] nobody
94-47726
3 months ago
unknown
unknown
14752 AntoineChambert-Loir
author:AntoineChambert-Loir
fix(Topology/Algebra/Valued): repair definition of Valued Following a [discussion on Zulip](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Question.20about.20.60Valued.2Eis_topological_valuation.60), we modify the definition of the field `is_topological_valuation` of `Valued` insisting that the element $\gamma$ showing up there is in the subgroup generated by the image of the valuation map. Co-authored-by: @faenuccio - [ ] depends on: #25496 t-algebra t-topology merge-conflict WIP
label:t-algebra$
1166/301 Mathlib.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/NumberTheory/NumberField/FinitePlaces.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/RankOne.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/ValuedField.lean,Mathlib/Topology/UniformSpace/AbstractCompletion.lean,docs/references.bib 12 28 ['AntoineChambert-Loir', 'faenuccio', 'github-actions', 'jcommelin', 'kbuzzard', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'riccardobrasca'] riccardobrasca
assignee:riccardobrasca
92-38870
3 months ago
92-38872
3 months ago
1-33784
1 day
15213 adomani
author:adomani
dev: add Mathlib.Tactic.Linter.ForallIntro --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-linter merge-conflict WIP 608/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/ForallIntro.lean,MathlibTest/ForallIntro.lean 5 5 ['adomani', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
90-86098
2 months ago
90-86099
2 months ago
0-0
0 seconds
16074 Rida-Hamadani
author:Rida-Hamadani
feat: combinatorial maps and planar graphs We define combinatorial maps, then we define planar graph using combinatorial maps. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics merge-conflict 243/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Planar.lean,Mathlib/Data/CombinatorialMap.lean 3 28 ['Parcly-Taxel', 'Rida-Hamadani', 'github-actions', 'lambda-fairy', 'leanprover-community-bot-assistant'] kmill
assignee:kmill
90-83876
2 months ago
90-83877
2 months ago
72-51453
72 days
16801 awainverse
author:awainverse
feat(ModelTheory/Equivalence): The quotient type of formulas modulo a theory Defines `FirstOrder.Language.Theory.Formula`: `T.Formula α` is the quotient of `L.Formula α` by equivalence modulo a theory `T`. Puts a boolean algebra instance on `T.Formula α`, with `≤` corresponding to implication. --- - [x] depends on: #16799 - [x] depends on: #16800 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic merge-conflict awaiting-author 174/60 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Types.lean 3 30 ['YaelDillies', 'awainverse', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'metinersin'] YaelDillies
assignee:YaelDillies
90-83875
2 months ago
90-83875
2 months ago
29-26213
29 days
17458 urkud
author:urkud
refactor(Algebra/Group): make `IsUnit` a typeclass Also change some lemmas to assume `[IsUnit _]` instead of `[Invertible _]`. Motivated by potential non-defeq diamonds in #14986, see also [Zulip](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Invertible.20and.20data) I no longer plan to merge this PR, but I'm going to cherry-pick some changes to a new PR before closing this one. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-algebra merge-conflict
label:t-algebra$
82/72 Mathlib/Algebra/CharP/Invertible.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Units.lean,Mathlib/Algebra/Polynomial/Splits.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Normed/Affine/Isometry.lean,Mathlib/Analysis/Normed/Ring/Units.lean,Mathlib/CategoryTheory/Linear/Basic.lean,Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/FieldTheory/Separable.lean,Mathlib/FieldTheory/SeparableDegree.lean,Mathlib/GroupTheory/Submonoid/Inverses.lean,Mathlib/LinearAlgebra/AffineSpace/AffineEquiv.lean,Mathlib/LinearAlgebra/AffineSpace/Combination.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Contraction.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Inversion.lean,Mathlib/LinearAlgebra/CliffordAlgebra/SpinGroup.lean,Mathlib/LinearAlgebra/Eigenspace/Minpoly.lean,Mathlib/NumberTheory/MulChar/Basic.lean,Mathlib/RingTheory/Localization/NumDen.lean,Mathlib/RingTheory/Polynomial/Content.lean,Mathlib/RingTheory/Polynomial/GaussLemma.lean,Mathlib/RingTheory/Valuation/Basic.lean 26 12 ['MichaelStollBayreuth', 'acmepjz', 'eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'urkud'] nobody
90-83874
2 months ago
90-83874
2 months ago
0-66650
18 hours
17627 hrmacbeth
author:hrmacbeth
feat: universal properties of vector bundle constructions Characterizations for the smoothness of maps into the total spaces of (1) the direct sum of two vector bundles; (2) the pullback of a vector bundle. This gap in the library was exposed by #17358. --- - [x] depends on: #22804 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict delegated 311/9 Mathlib/Data/Bundle.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/Pullback.lean,Mathlib/Topology/FiberBundle/Constructions.lean 4 24 ['PatrickMassot', 'github-actions', 'grunweg', 'hrmacbeth', 'j-loreaux', 'leanprover-community-bot-assistant', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'sgouezel'] grunweg
assignee:grunweg
90-83873
2 months ago
90-83873
2 months ago
91-73632
91 days
19444 joelriou
author:joelriou
feat(CategoryTheory/Sites): Equivalence of categories of sheaves with a dense subsite that is 1-hypercover dense The main result is that if `F : C₀ ⥤ C` is a dense subsite (relatively to topologies `J₀` and `J`) and `F.IsOneHypercoverDense J₀ J` (for a certain universe `w`), then if a coefficient category `A` has limits of size `w`, the pushforward functor induces an equivalence `Sheaf J A ≌ Sheaf J₀ A`. We deduce that if `HasSheafify J₀ A`, then `HasSheafify J A` also holds. This was previously known (see `IsDenseSubsite.sheafEquiv` in `Sites.DenseSubsite`) under a somewhat stronger condition about the existence of limits in `A`. --- - [x] depends on: #19517 - [x] depends on: #19519 This is very much a draft. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict WIP 937/2 Mathlib.lean,Mathlib/CategoryTheory/Sites/Continuous.lean,Mathlib/CategoryTheory/Sites/DenseSubsite/Basic.lean,Mathlib/CategoryTheory/Sites/DenseSubsite/OneHypercoverDense.lean,Mathlib/CategoryTheory/Sites/DenseSubsite/SheafEquiv.lean,Mathlib/CategoryTheory/Sites/OneHypercover.lean 6 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
90-83750
2 months ago
90-83750
2 months ago
0-0
0 seconds
19796 peakpoint
author:peakpoint
feat: L'Hopital's rule from within a convex set --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis merge-conflict 190/19 Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Analysis/Calculus/LHopital.lean,Mathlib/Analysis/Convex/Topology.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Order/Interval/Set/Basic.lean 5 15 ['RemyDegenne', 'github-actions', 'leanprover-community-bot-assistant', 'peakpoint', 'sgouezel'] sgouezel
assignee:sgouezel
90-83749
2 months ago
90-83749
2 months ago
80-57750
80 days
22928 javra
author:javra
feat(CategoryTheory): infrastructure for inclusion morphisms into products in categories with 0-morphisms --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict 52/14 Mathlib/CategoryTheory/Limits/Shapes/BinaryBiproducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Biproducts.lean,Mathlib/CategoryTheory/Limits/Shapes/ZeroMorphisms.lean 3 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
90-83368
2 months ago
90-83369
2 months ago
112-51866
112 days
22952 eric-wieser
author:eric-wieser
refactor: reimplement `RingQuot` in terms of `RingCon.Quotient` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
157/184 Mathlib/Algebra/RingQuot.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/RingTheory/Congruence/Basic.lean,Mathlib/RingTheory/Congruence/Defs.lean 4 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
90-83367
2 months ago
90-83368
2 months ago
0-0
0 seconds
23763 grunweg
author:grunweg
feat(Linter.openClassical): also lint for Classical declarations as … …a local or scoped instance. --- - [ ] depends on: #23750 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict 138/33 Mathlib/RingTheory/Perfection.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Topology/MetricSpace/GromovHausdorffRealized.lean,MathlibTest/GeneralizeProofs.lean,MathlibTest/LintStyle.lean 5 6 ['github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
90-83360
2 months ago
90-83360
2 months ago
82-7297
82 days
23637 kirilvino
author:kirilvino
feat(Combinatorics/SimpleGraph): every circuit contains a cycle proof circuit to cycle proof --- This PR uses the bypass definition in a new function for closed walks that removes repeated vertices. Then proves if the closed walk given is a circuit, that the result from this function is a cycle. This is then packaged up similar to the existing ToPath definition, creating a way of transforming a circuit into a cycle. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics merge-conflict awaiting-author 26/0 Mathlib/Combinatorics/SimpleGraph/Path.lean 1 9 ['b-mehta', 'github-actions', 'kirilvino', 'leanprover-community-bot-assistant'] nobody
90-83360
2 months ago
90-83361
2 months ago
13-19789
13 days
24350 erdOne
author:erdOne
feat(FieldTheory): fg extension over perfect field is separably generated Co-authored-by: Christian Merten --- - [x] depends on: #24344 - [x] depends on: #24346 - [x] depends on: #24347 - [x] depends on: #24348 - [x] depends on: #24349 - [x] depends on: #25062 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
466/0 Mathlib.lean,Mathlib/FieldTheory/IntermediateField/Algebraic.lean,Mathlib/FieldTheory/SeparableClosure.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/RingTheory/AlgebraicIndependent/Basic.lean,Mathlib/RingTheory/AlgebraicIndependent/TranscendenceBasis.lean 6 30 ['alreadydone', 'erdOne', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
90-82971
2 months ago
90-82972
2 months ago
21-66961
21 days
24489 mattrobball
author:mattrobball
test merge-conflict 185/152 Mathlib/Algebra/GCDMonoid/Nat.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/Polynomial/Coeff.lean,Mathlib/Algebra/Polynomial/Eval/Degree.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/AlgebraicGeometry/AffineSpace.lean,Mathlib/Analysis/CStarAlgebra/Classes.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Integral.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Isometric.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unique.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/Complex/Polynomial/Basic.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/InjectiveSeminorm.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Choose/Vandermonde.lean,Mathlib/FieldTheory/Galois/Profinite.lean,Mathlib/FieldTheory/IsAlgClosed/Spectrum.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/FieldTheory/KummerPolynomial.lean,Mathlib/GroupTheory/SpecificGroups/Cyclic.lean,Mathlib/GroupTheory/SpecificGroups/Dihedral.lean,Mathlib/GroupTheory/Subgroup/Center.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Basic.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Grading.lean,Mathlib/LinearAlgebra/ExteriorAlgebra/Grading.lean,Mathlib/LinearAlgebra/Matrix/SpecialLinearGroup.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/LinearAlgebra/RootSystem/Finite/CanonicalBilinear.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/Basic.lean,Mathlib/RepresentationTheory/FDRep.lean,Mathlib/RingTheory/Spectrum/Prime/ChevalleyComplexity.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/RingTheory/WittVector/Frobenius.lean,Mathlib/Tactic/Ring/Basic.lean 38 5 ['github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
90-82966
2 months ago
90-82967
2 months ago
0-0
0 seconds
24558 mattrobball
author:mattrobball
test merge-conflict 32/30 Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Data/Matroid/Circuit.lean,Mathlib/Data/Matroid/Closure.lean,Mathlib/Data/Matroid/Loop.lean,Mathlib/Data/Set/Insert.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Basic.lean,Mathlib/Geometry/Euclidean/Angle/Oriented/Affine.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Affine.lean,Mathlib/Geometry/Manifold/ContMDiff/Defs.lean,Mathlib/LinearAlgebra/AffineSpace/FiniteDimensional.lean,Mathlib/Order/Cover.lean 12 5 ['github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
90-82965
2 months ago
90-82965
2 months ago
0-0
0 seconds
24614 JovanGerb
author:JovanGerb
chore: rename field `inf` to `min` in `Lattice` As suggested by @eric-wieser, this PR renames the `sup` and `inf` fields in `Lattice` to `max` and `min`. This means that we now can extend `Lattice` and `LinearOrder` simultaneously without ending up with duplicate fields. This should be implemented in a future PR for existing classes like `CompleteLinearOrder`. [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.60sup.60.2F.60inf.60.20or.20.60max.60.2F.60min.60.20for.20set.20interval.20lemmas.3F) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict awaiting-author 179/185 Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Group/Subgroup/Lattice.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Group/Subsemigroup/Basic.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Module/Submodule/Lattice.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/Ring/Idempotent.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Tropical/Lattice.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/Convex/SimplicialComplex/Basic.lean,Mathlib/Analysis/Normed/Group/Seminorm.lean,Mathlib/Analysis/NormedSpace/ENormedSpace.lean,Mathlib/Analysis/NormedSpace/MStructure.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/CategoryTheory/Groupoid/Subgroupoid.lean,Mathlib/CategoryTheory/Sites/Coverage.lean,Mathlib/CategoryTheory/Sites/Grothendieck.lean,Mathlib/CategoryTheory/Sites/Pretopology.lean,Mathlib/CategoryTheory/Sites/Sieves.lean,Mathlib/CategoryTheory/Subobject/Lattice.lean,Mathlib/CategoryTheory/Subpresheaf/Basic.lean,Mathlib/Combinatorics/Digraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Computability/Reduce.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finset/Lattice/Basic.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Multiset/UnionInter.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/PEquiv.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Data/Semiquot.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/Data/Sum/Lattice.lean,Mathlib/Dynamics/Circle/RotationNumber/TranslationNumber.lean,Mathlib/Geometry/Convex/Cone/Basic.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Defs.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/MeasureTheory/Function/AEEqFun.lean,Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/ModelTheory/Substructures.lean,Mathlib/Order/BooleanSubalgebra.lean,Mathlib/Order/Booleanisation.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/Concept.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean,Mathlib/Order/Copy.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/Order/FixedPoints.lean,Mathlib/Order/GaloisConnection/Basic.lean,Mathlib/Order/Heyting/Basic.lean,Mathlib/Order/Hom/Order.lean,Mathlib/Order/Ideal.lean,Mathlib/Order/Interval/Basic.lean,Mathlib/Order/Lattice.lean,Mathlib/Order/Partition/Finpartition.lean,Mathlib/Order/PropInstances.lean,Mathlib/Order/Sublattice.lean,Mathlib/Order/WithBot.lean,Mathlib/Probability/Process/Filtration.lean,Mathlib/RingTheory/Congruence/Basic.lean,Mathlib/RingTheory/Finiteness/Small.lean,Mathlib/RingTheory/NonUnitalSubring/Basic.lean,Mathlib/RingTheory/NonUnitalSubsemiring/Basic.lean,Mathlib/RingTheory/TwoSidedIdeal/Lattice.lean,Mathlib/RingTheory/UniqueFactorizationDomain/FactorSet.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/Topology/Algebra/Group/GroupTopology.lean,Mathlib/Topology/Category/TopCat/OpenNhds.lean,Mathlib/Topology/LocallyFinsupp.lean,Mathlib/Topology/MetricSpace/BundledFun.lean,Mathlib/Topology/UniformSpace/Basic.lean 82 14 ['JovanGerb', 'bryangingechen', 'eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'leanprover-community-mathlib4-bot'] nobody
90-82964
2 months ago
90-82964
2 months ago
1-85670
1 day
24710 chrisflav
author:chrisflav
chore(Data/Set): `tsum` version of `Set.encard_iUnion_of_finite` for non-finite types As requested here: https://github.com/leanprover-community/mathlib4/pull/23849#discussion_r2081070200 --- - [ ] depends on: #23849 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 163/0 Mathlib.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Data/Set/Card/Arithmetic.lean,Mathlib/Data/Set/Card/InfiniteArithmetic.lean,Mathlib/Data/Set/Finite/Lattice.lean,Mathlib/Topology/Algebra/InfiniteSum/Order.lean,Mathlib/Topology/Instances/ENat/Lemmas.lean 7 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
90-82962
2 months ago
90-82962
2 months ago
1-80465
1 day
24823 eric-wieser
author:eric-wieser
refactor: add `hom` lemmas for the `MonoidalCategory` structure on `ModuleCat` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
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
90-82961
2 months ago
90-82961
2 months ago
43-42841
43 days
25071 erdOne
author:erdOne
feat(EllipticCurve): basic API for singular cubics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry merge-conflict 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
90-82715
2 months ago
90-82716
2 months ago
45-4961
45 days
25197 eric-wieser
author:eric-wieser
feat: Finset.sum induction for tensor products. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra merge-conflict
label:t-algebra$
81/0 Mathlib/LinearAlgebra/TensorProduct/Basic.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
90-82713
2 months ago
90-82714
2 months ago
0-0
0 seconds
25218 kckennylau
author:kckennylau
feat(AlgebraicGeometry): Tate normal form of elliptic curves --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip new-contributor t-algebraic-geometry merge-conflict 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
90-82712
2 months ago
90-82713
2 months ago
6-51040
6 days
25247 alreadydone
author:alreadydone
Projective contraction --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
160/31 Mathlib/Data/Finsupp/Defs.lean,Mathlib/LinearAlgebra/Contraction.lean,Mathlib/LinearAlgebra/Pi.lean,Mathlib/RingTheory/Finiteness/Finsupp.lean 4 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
90-82709
2 months ago
90-82710
2 months ago
0-30
30 seconds
25283 Brian-Nugent
author:Brian-Nugent
feat: regular local rings Adds regular local rings and proves they are integral domains. --- - [ ] depends on: #25280 - [ ] depends on: #25282 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra merge-conflict
label:t-algebra$
871/0 .vscode/settings.json,Mathlib.lean,Mathlib/RingTheory/EmbeddingDimension.lean,Mathlib/RingTheory/LocalRingDimension.lean,Mathlib/RingTheory/RegularLocalRing.lean 5 6 ['Brian-Nugent', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'yuanyi-350'] nobody
90-82708
2 months ago
90-82708
2 months ago
11-84822
11 days
25561 callesonne
author:callesonne
feat(Category/Grpd): define the bicategory of groupoids --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict awaiting-author 179/25 Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/CategoryTheory/Bicategory/Functor/Pseudofunctor.lean,Mathlib/CategoryTheory/Bicategory/Functor/Strict.lean,Mathlib/CategoryTheory/Category/Cat.lean,Mathlib/CategoryTheory/Category/Grpd.lean 6 6 ['callesonne', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'robin-carlier'] nobody
90-82697
2 months ago
90-82698
2 months ago
11-11653
11 days
25573 JovanGerb
author:JovanGerb
feat: define `∃ x > y, ...` notation to mean `∃ x, y < x ∧ ...` This PR changes the elaboration of the binders `∃ x > y,` and `∀ x > y,` to use `<` instead of `>`, because we want to avoid working with `>` as much as possible (and similarly for `≥` vs `≤` ). The advantage is that we don't need to worry about rewriting with lemmas like `gt_iff_lt`. The disadvantage is that people might find this confusing. [#mathlib4 > naming convention for ≤ and < @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/naming.20convention.20for.20.E2.89.A4.20and.20.3C/near/522910464) The main changes are in `Mathlib.Init`, `Mathlib.Util.Delaborators` and `MathlibTest.delaborators`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 59/52 Counterexamples/DiscreteTopologyNonDiscreteUniformity.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/BoxIntegral/Integrability.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Complex/Liouville.lean,Mathlib/Analysis/Complex/OpenMapping.lean,Mathlib/Analysis/Fourier/PoissonSummation.lean,Mathlib/Analysis/MellinTransform.lean,Mathlib/Analysis/Normed/Operator/Banach.lean,Mathlib/Dynamics/Ergodic/Conservative.lean,Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Init.lean,Mathlib/MeasureTheory/Covering/LiminfLimsup.lean,Mathlib/MeasureTheory/Function/ConvergenceInMeasure.lean,Mathlib/MeasureTheory/Function/Egorov.lean,Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic.lean,Mathlib/MeasureTheory/Integral/DivergenceTheorem.lean,Mathlib/MeasureTheory/Integral/Layercake.lean,Mathlib/NumberTheory/LSeries/SumCoeff.lean,Mathlib/Order/Filter/AtTopBot/Finite.lean,Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/Topology/CWComplex/Classical/Finite.lean,Mathlib/Topology/ContinuousMap/Ideals.lean,Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/EMetricSpace/Paracompact.lean,Mathlib/Topology/LocallyFinite.lean,Mathlib/Topology/MetricSpace/Ultra/Basic.lean,Mathlib/Util/Delaborators.lean,MathlibTest/delaborators.lean 32 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
90-82696
2 months ago
90-82697
2 months ago
26-17604
26 days
25622 eric-wieser
author:eric-wieser
refactor: overhaul instances on LocalizedModule This: * Generalizes the `SMul`, `Module`, and `Algebra` instances via appropriate compatibility conditions * Generalizes the `Mul` instance to the non-unital setting * Fixes instances diamonds for the `Nat`- and `Int`-actions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
167/111 Mathlib/Algebra/Module/LocalizedModule/Basic.lean 1 4 ['erdOne', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] nobody
90-82570
2 months ago
90-82571
2 months ago
25-53155
25 days
25671 eric-wieser
author:eric-wieser
refactor: generalize `OreSet` to work for bimodules --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict 243/256 Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/GroupTheory/OreLocalization/Basic.lean,Mathlib/GroupTheory/OreLocalization/OreSet.lean,Mathlib/RingTheory/OreLocalization/Ring.lean,Mathlib/RingTheory/TensorProduct/Nontrivial.lean 6 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
90-82568
2 months ago
90-82569
2 months ago
0-0
0 seconds
25816 sgouezel
author:sgouezel
chore: kill coercion from EquivLike to Equiv --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic merge-conflict WIP 35/37 Mathlib/Logic/Equiv/Defs.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
90-82554
2 months ago
90-82554
2 months ago
0-1
1 second
25887 eric-wieser
author:eric-wieser
feat: add `IsSMulTorsionFree` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra merge-conflict
label:t-algebra$
130/12 Mathlib/Algebra/Group/Action/TorsionFree.lean,Mathlib/Algebra/NoZeroSMulDivisors/Basic.lean,Mathlib/Algebra/Regular/Opposite.lean 3 4 ['YaelDillies', 'github-actions', 'leanprover-community-bot-assistant'] nobody
90-82420
2 months ago
90-82421
2 months ago
0-0
0 seconds
25901 callesonne
author:callesonne
feat(Bicategory/Opposites): add 1-cell opposite bicategory This PR adds the 1-cell opposite bicategory, where only the 1-morphisms are reversed. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict awaiting-author 219/1 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Opposites.lean,Mathlib/CategoryTheory/Opposites.lean,Mathlib/Tactic/CategoryTheory/Reassoc.lean 4 10 ['callesonne', 'github-actions', 'joelriou', 'leanprover-bot', 'leanprover-community-bot-assistant'] nobody
90-82417
2 months ago
90-82417
2 months ago
0-14913
4 hours
25963 artie2000
author:artie2000
refactor: Abstract out the substructure lattice construction and SetLike closure operators --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) Original PR: https://github.com/leanprover-community/mathlib4/pull/20836 merge-conflict 354/179 Mathlib/Algebra/Group/Subsemigroup/Basic.lean,Mathlib/Algebra/Group/Subsemigroup/Defs.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/Data/SetLike/Closure.lean 4 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
90-82405
2 months ago
90-82406
2 months ago
0-0
0 seconds
25988 Multramate
author:Multramate
refactor(AlgebraicGeometry/EllipticCurve/*): replace Fin 3 with products This PR continues the work from #24593. Original PR: https://github.com/leanprover-community/mathlib4/pull/24593 t-algebraic-geometry merge-conflict 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
90-82403
2 months ago
90-82403
2 months ago
18-21880
18 days
26002 robin-carlier
author:robin-carlier
feat(CategoryTheory/Monoidal/Action): action of `Type` on categories with coproducts We show that if a category admits coproducts of size `w`, then `Type w` acts on the left on that category. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict WIP 213/0 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Action/ChosenTypeCopowers.lean 2 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
90-82401
2 months ago
90-82402
2 months ago
0-0
0 seconds
26011 linesthatinterlace
author:linesthatinterlace
feat: add elementary lifts for `OneHom`, `MulHom`, `MonoidHom` and `RingHom`. This PR continues the work from #25264. Original PR: https://github.com/leanprover-community/mathlib4/pull/25264 migrated-from-branch t-algebra merge-conflict
label:t-algebra$
414/10 Mathlib/Algebra/Group/Hom/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Ring/Hom/Basic.lean,Mathlib/Algebra/Ring/Hom/Defs.lean 4 3 ['github-actions', 'leanprover-community-bot-assistant', 'linesthatinterlace'] nobody
90-82399
2 months ago
90-82400
2 months ago
17-68825
17 days
26012 linesthatinterlace
author:linesthatinterlace
feat: Low-level derivatives of lifts on `OneHom`, `MulHom` and `MonoidHom` This PR continues the work from #25290. Original PR: https://github.com/leanprover-community/mathlib4/pull/25290 migrated-from-branch t-algebra merge-conflict
label:t-algebra$
785/34 Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Hom/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Ring/Hom/Basic.lean,Mathlib/Algebra/Ring/Hom/Defs.lean 5 3 ['github-actions', 'leanprover-community-bot-assistant', 'linesthatinterlace'] nobody
90-82398
2 months ago
90-82399
2 months ago
17-68773
17 days
26090 grunweg
author:grunweg
chore: make `finiteness` a default tactic Opening for discussion. This PR continues the work from #25119. merge-conflict 423/366 Archive/Wiedijk100Theorems/BallotProblem.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Asymptotics/ExpGrowth.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Convex/Integral.lean,Mathlib/Analysis/Fourier/AddCircle.lean,Mathlib/Analysis/Fourier/AddCircleMulti.lean,Mathlib/Analysis/FunctionalSpaces/SobolevInequality.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/SpecialFunctions/Pow/Continuity.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Analysis/SpecificLimits/Basic.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/ENNReal/Holder.lean,Mathlib/Data/ENNReal/Inv.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/ENNReal/Real.lean,Mathlib/Data/EReal/Basic.lean,Mathlib/Data/EReal/Operations.lean,Mathlib/InformationTheory/KullbackLeibler/Basic.lean,Mathlib/MeasureTheory/Covering/Besicovitch.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Function/ContinuousMapDense.lean,Mathlib/MeasureTheory/Function/ConvergenceInMeasure.lean,Mathlib/MeasureTheory/Function/Egorov.lean,Mathlib/MeasureTheory/Function/Jacobian.lean,Mathlib/MeasureTheory/Function/L1Space/AEEqFun.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/ChebyshevMarkov.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Defs.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/Complete.lean,Mathlib/MeasureTheory/Function/LpSpace/Indicator.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Integral/Prod.lean,Mathlib/MeasureTheory/Integral/RieszMarkovKakutani/Real.lean,Mathlib/MeasureTheory/Measure/Decomposition/IntegralRNDeriv.lean,Mathlib/MeasureTheory/Measure/Decomposition/Lebesgue.lean,Mathlib/MeasureTheory/Measure/Haar/Basic.lean,Mathlib/MeasureTheory/Measure/Haar/DistribChar.lean,Mathlib/MeasureTheory/Measure/Haar/Quotient.lean,Mathlib/MeasureTheory/Measure/Haar/Unique.lean,Mathlib/MeasureTheory/Measure/Lebesgue/EqHaar.lean,Mathlib/MeasureTheory/Measure/LevyProkhorovMetric.lean,Mathlib/MeasureTheory/Measure/Real.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/MeasureTheory/Measure/Tilted.lean,Mathlib/MeasureTheory/Measure/Typeclasses/Finite.lean,Mathlib/NumberTheory/NumberField/Discriminant/Basic.lean,Mathlib/Probability/BorelCantelli.lean,Mathlib/Probability/Independence/Conditional.lean,Mathlib/Probability/Integration.lean,Mathlib/Probability/Kernel/Composition/IntegralCompProd.lean,Mathlib/Probability/Kernel/Disintegration/CondCDF.lean,Mathlib/Probability/Kernel/Disintegration/Density.lean,Mathlib/Probability/Martingale/Convergence.lean,Mathlib/Probability/Martingale/OptionalStopping.lean,Mathlib/Probability/Moments/CovarianceBilin.lean,Mathlib/Probability/Moments/Tilted.lean,Mathlib/Probability/Moments/Variance.lean,Mathlib/Probability/UniformOn.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/Perfect.lean,scripts/noshake.json 73 3 ['github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
90-80413
2 months ago
90-80414
2 months ago
16-56825
16 days
26384 jjdishere
author:jjdishere
feat(RingTheory/Perfectoid): Fontaine's theta map is surjective This PR continues the work from #22332. Original PR: https://github.com/leanprover-community/mathlib4/pull/22332 t-algebra t-number-theory merge-conflict WIP
label:t-algebra$
1109/15 Mathlib.lean,Mathlib/Algebra/Ring/Aut.lean,Mathlib/FieldTheory/Perfect.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Quotient/Defs.lean,Mathlib/RingTheory/Ideal/Quotient/PowTransition.lean,Mathlib/RingTheory/Perfection.lean,Mathlib/RingTheory/Perfectoid/BDeRham.lean,Mathlib/RingTheory/Perfectoid/FontaineTheta.lean,Mathlib/RingTheory/Perfectoid/Untilt.lean,Mathlib/RingTheory/WittVector/Basic.lean,Mathlib/RingTheory/WittVector/Complete.lean,Mathlib/RingTheory/WittVector/TeichmullerSeries.lean,docs/references.bib 15 3 ['github-actions', 'jjdishere', 'leanprover-community-bot-assistant'] nobody
90-80267
2 months ago
90-80267
2 months ago
0-135
2 minutes
26388 jjdishere
author:jjdishere
feat(RingTheory/Perfectoid): Fontaine's theta map and the de Rham period rings This PR continues the work from #21564. Original PR: https://github.com/leanprover-community/mathlib4/pull/21564 t-algebra t-number-theory merge-conflict
label:t-algebra$
1026/15 Mathlib.lean,Mathlib/Algebra/Ring/Aut.lean,Mathlib/FieldTheory/Perfect.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Quotient/Defs.lean,Mathlib/RingTheory/Ideal/Quotient/PowTransition.lean,Mathlib/RingTheory/Perfection.lean,Mathlib/RingTheory/Perfectoid/BDeRham.lean,Mathlib/RingTheory/Perfectoid/FontaineTheta.lean,Mathlib/RingTheory/Perfectoid/Untilt.lean,Mathlib/RingTheory/WittVector/Basic.lean,Mathlib/RingTheory/WittVector/Complete.lean,Mathlib/RingTheory/WittVector/TeichmullerSeries.lean,docs/references.bib 15 n/a ['github-actions', 'jjdishere', 'leanprover-community-bot-assistant', 'riccardobrasca'] riccardobrasca
assignee:riccardobrasca
90-80265
2 months ago
unknown
unknown
26436 AntoineChambert-Loir
author:AntoineChambert-Loir
feat(Mathlib/Data/Nat/Prime/Defs): fuel Nat.minFac This is a fueled version of docs#Nat.minFacAux that can now be checked by `decide`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 53/48 Mathlib/Data/Nat/Prime/Defs.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
90-80261
2 months ago
90-80261
2 months ago
8-58125
8 days
26776 sgouezel
author:sgouezel
refactor: make `I` an outparam, and use forgetful inheritance in products I consider this as a failed experiment, so it's not for merging. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) RFC merge-conflict WIP 2411/1664 Mathlib/Analysis/Asymptotics/Defs.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/Classes.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/Calculus/InverseFunctionTheorem/ApproximatesLinearOn.lean,Mathlib/Analysis/Calculus/TangentCone.lean,Mathlib/Analysis/Calculus/TangentConeDef.lean,Mathlib/Analysis/Complex/Circle.lean,Mathlib/Analysis/Complex/UnitDisc/Basic.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Topology.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Module/Prod.lean,Mathlib/Analysis/NormedSpace/HomeomorphBall.lean,Mathlib/Analysis/NormedSpace/Multilinear/Basic.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Basic.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/PolarCoord.lean,Mathlib/Analysis/SpecialFunctions/Sqrt.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Arctan.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Inverse.lean,Mathlib/Geometry/Manifold/Algebra/Monoid.lean,Mathlib/Geometry/Manifold/AnalyticManifold.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Geometry/Manifold/Complex.lean,Mathlib/Geometry/Manifold/ContMDiff/Basic.lean,Mathlib/Geometry/Manifold/ContMDiff/Constructions.lean,Mathlib/Geometry/Manifold/ContMDiff/Defs.lean,Mathlib/Geometry/Manifold/ContMDiff/NormedSpace.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Geometry/Manifold/IsManifold/ModelWithCornersDef.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/Manifold/LocalInvariantProperties.lean,Mathlib/Geometry/Manifold/MFDeriv/Atlas.lean,Mathlib/Geometry/Manifold/MFDeriv/Basic.lean,Mathlib/Geometry/Manifold/MFDeriv/Defs.lean,Mathlib/Geometry/Manifold/MFDeriv/FDeriv.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean,Mathlib/Geometry/Manifold/MFDeriv/UniqueDifferential.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/FiberwiseLinear.lean,Mathlib/Geometry/Manifold/VectorBundle/Hom.lean,Mathlib/Geometry/Manifold/VectorBundle/MDifferentiable.lean,Mathlib/Geometry/Manifold/VectorBundle/Tangent.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Basic.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/NormLeOne.lean,Mathlib/Topology/Algebra/Constructions.lean,Mathlib/Topology/Algebra/Module/LocallyConvex.lean,Mathlib/Topology/Algebra/PontryaginDual.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/Basic.lean,Mathlib/Topology/CWComplex/Classical/Basic.lean,Mathlib/Topology/Clopen.lean,Mathlib/Topology/Connected/TotallyDisconnected.lean,Mathlib/Topology/Constructions/SumProd.lean,Mathlib/Topology/ContinuousMap/Bounded/Basic.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/ContinuousOnMore.lean,Mathlib/Topology/Covering.lean,Mathlib/Topology/Defs/Basic.lean,Mathlib/Topology/Defs/Filter.lean,Mathlib/Topology/FiberBundle/Basic.lean,Mathlib/Topology/FiberBundle/Constructions.lean,Mathlib/Topology/FiberBundle/Trivialization.lean,Mathlib/Topology/Inseparable.lean,Mathlib/Topology/Instances/AddCircle.lean,Mathlib/Topology/Instances/Shrink.lean,Mathlib/Topology/Instances/TrivSqZeroExt.lean,Mathlib/Topology/Irreducible.lean,Mathlib/Topology/IsLocalHomeomorph.lean,Mathlib/Topology/LocallyFinite.lean,Mathlib/Topology/OmegaCompletePartialOrder.lean,Mathlib/Topology/Order/LeftRight.lean,Mathlib/Topology/PartialHomeomorph.lean,Mathlib/Topology/PartialHomeomorphMore.lean,Mathlib/Topology/Separation/Basic.lean,Mathlib/Topology/Separation/Regular.lean,Mathlib/Topology/UniformSpace/Basic.lean,Mathlib/Topology/UniformSpace/Cauchy.lean,Mathlib/Topology/UniformSpace/Defs.lean,Mathlib/Topology/UniformSpace/UniformConvergenceTopology.lean,Mathlib/Topology/VectorBundle/Basic.lean,Mathlib/Topology/VectorBundle/Hom.lean 88 0 [] nobody
90-70346
2 months ago
90-70346
2 months ago
0-1
1 second
7596 alreadydone
author:alreadydone
feat: covering maps from properly discontinuous actions and discrete subgroups --- - [x] depends on: #23236 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-topology merge-conflict 350/21 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Complex/Circle.lean,Mathlib/Topology/Algebra/ConstMulAction.lean,Mathlib/Topology/Algebra/Group/Pointwise.lean,Mathlib/Topology/Covering/AddCircle.lean,Mathlib/Topology/Covering/Basic.lean,Mathlib/Topology/Covering/Galois.lean,Mathlib/Topology/Homotopy/Lifting.lean,Mathlib/Topology/Instances/AddCircle/Defs.lean 9 18 ['ADedecker', 'alreadydone', 'digama0', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'tb65536'] nobody
90-34579
2 months ago
90-34580
2 months ago
73-67280
73 days
24405 mcdoll
author:mcdoll
refactor(Topology/Algebra/Module/WeakDual): Clean up - Move `Dual` and `dualPairing` lower in the import-hierachy - deduplicate `dualPairing` - Make `WeakDual` and `WeakSpace` reducible --- New version of #11500 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-topology merge-conflict 146/162 Mathlib.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/LocallyConvex/WeakSpace.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Analysis/Normed/Module/WeakDual.lean,Mathlib/Analysis/VonNeumannAlgebra/Basic.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Measure/FiniteMeasure.lean,Mathlib/Topology/Algebra/Module/Dual.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,docs/overview.yaml,docs/undergrad.yaml 14 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
89-47832
2 months ago
89-47833
2 months ago
69-52361
69 days
26647 b-mehta
author:b-mehta
feat(Data/Sym/Sym2): lift commutative operations to sym2 While we have `Sym2.lift`, it's often useful to lift operations which are known to be commutative to the typeclass system. Indeed, the existing `Sym2.mul` witnesses this already. Thus, this PR can also be seen as generalising `Sym2.mul`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict WIP 48/28 Mathlib/Data/Sym/Sym2.lean,Mathlib/Data/Sym/Sym2/Finsupp.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/QuadraticForm/Basis.lean 4 12 ['b-mehta', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] nobody
88-85993
2 months ago
88-85994
2 months ago
3-73380
3 days
26067 mapehe
author:mapehe
feat(Topology/StoneCech): exists_continuous_surjection_from_StoneCech_to_dense_range This lemma formalises the following version of the maximality property of the Stone–Čech compactification: If `f : α → β` is a continuous map from a topological space `α` to a Hausdorff space `β` with dense range, then there exists a continuous surjection from `StoneCech α` to `β` extending `f`. In particular, `StoneCech α` is the “largest” compact Hausdorff space into which `α` densely embeds, in the sense that any other such space is a continuous image of it. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 18/0 Mathlib/Topology/StoneCech.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
87-63781
2 months ago
87-63781
2 months ago
20-8582
20 days
23990 robertmaxton42
author:robertmaxton42
feat (Types.Colimits): Quot is functorial and colimitEquivQuot is natural Add `Functor.quotFunctor` to parallel `Functor.sectionsFunctor`, witnessing that `Quot` is functorial; add `colimNatIsoQuotFunctor` to parallel `limNatIsoSectionsFunctor`, witnessing that `colimitEquivQuot` is natural in the diagram $F$. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory merge-conflict awaiting-author 33/0 Mathlib/CategoryTheory/Limits/Types/Colimits.lean 1 5 ['github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'robertmaxton42'] nobody
87-4124
2 months ago
87-4125
2 months ago
8-28043
8 days
10541 Louddy
author:Louddy
feat(Algebra/SkewMonoidAlgebra/Basic): add SkewMonoidAlgebra # Skew Monoid algebras This file presents a skewed version of `Mathlib.Algebra.MonoidAlgebra.Basic`. ## Definition We define `SkewMonoidAlgebra k G := G →₀ k` attached with a skewed convolution product. Here, the product of two elements `f g : SkewMonoidAlgebra k G` is the finitely supported function whose value at `a` is the sum of `f x * (x • g y)` over all pairs `x, y` such that `x * y = a`. This will be used in a later PR to define skew polynomial rings. Co-authored-by: María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)> --- - [x] depends on: #15878 - [x] depends on: #19084 - [x] depends on: #22078 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra merge-conflict WIP
label:t-algebra$
1624/0 Mathlib.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/Algebra/SkewMonoidAlgebra/Lift.lean 4 105 ['AntoineChambert-Loir', 'Louddy', 'YaelDillies', 'eric-wieser', 'fpvandoorn', 'github-actions', 'mariainesdff', 'mathlib4-dependent-issues-bot', 'mattrobball'] AntoineChambert-Loir
assignee:AntoineChambert-Loir
86-51790
2 months ago
86-51792
2 months ago
179-12934
179 days
24103 plp127
author:plp127
feat(Topology/UniformSpace/OfCompactT2): generalize theorem Generalize `uniformSpaceOfCompactT2` to `uniformSpaceOfCompactR1`. --- - [ ] depends on: #24098 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 48/24 Mathlib/Topology/Separation/Regular.lean,Mathlib/Topology/UniformSpace/OfCompactT2.lean 2 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
86-39556
2 months ago
86-39557
2 months ago
76-65641
76 days
25999 bjoernkjoshanssen
author:bjoernkjoshanssen
feat(Topology/Compactification): projective line over ℝ is homeomorphic to the one-point compactification of ℝ This PR continues the work from #18306. Original PR: https://github.com/leanprover-community/mathlib4/pull/18306 t-topology merge-conflict 920/0 Mathlib.lean,Mathlib/Topology/Compactification/OnePointHomeomorph.lean,Mathlib/Topology/Compactification/OnePointRealLemmas.lean 3 3 ['bjoernkjoshanssen', 'github-actions', 'leanprover-community-bot-assistant'] nobody
85-69855
2 months ago
87-63783
2 months ago
21-20473
21 days
24096 plp127
author:plp127
feat(Topology): Completely Regular Space iff Uniformizable Proves that `CompletelyRegularSpace`s are uniformizable and that `UniformSpace`s are completely regular. --- - [x] depends on: #24179 - [x] depends on: #24173 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 339/1 Mathlib.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/UniformSpace/Basic.lean,Mathlib/Topology/UniformSpace/Defs.lean,Mathlib/Topology/UniformSpace/Uniformizable.lean 5 10 ['alreadydone', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'plp127'] nobody
84-37083
2 months ago
84-82500
2 months ago
2-8297
2 days
25710 Paul-Lez
author:Paul-Lez
feat(Mathlib/Analysis/PDE/Quasilinear/Characteristics): the method of characteristics for first order quasilinear PDEs --- - [x] depends on: #25708 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict WIP 531/0 Mathlib/Analysis/Calculus/TangentCone.lean,Mathlib/Analysis/ODE/Gronwall.lean,Mathlib/Analysis/PDE/Quasilinear/Characteristics.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean,Mathlib/Topology/Separation/Basic.lean 5 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
84-35276
2 months ago
84-35277
2 months ago
0-1343
22 minutes
21039 eric-wieser
author:eric-wieser
hack: override `instance` to insert `fast_instance%` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict please-adopt 40/4 Mathlib/Algebra/Equiv/TransferInstance.lean,Mathlib/RingTheory/Ideal/Maximal.lean,Mathlib/Tactic/FastInstance.lean,Mathlib/Topology/FiberBundle/Basic.lean 4 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
84-26483
2 months ago
84-26483
2 months ago
0-0
0 seconds
26911 JovanGerb
author:JovanGerb
chore: fix naming of `mono` and `monotone` The naming convention says: "We use `_mono` for `a ≤ b → f a ≤ f b` and `_anti` for `a ≤ b → f b ≤ f a`, so we also use `_monotone` for `Monotone f`, `_antitone` for `Antitone f`, `_strictMono` for `StrictMono f`, `_strictAnti` for `StrictAnti f`, etc..." This PR swaps `mono`/`anti` and `monotone`/`antitone` where required so that `monotone` refers to `Monotone`, while `mono` refers to a lemma that might be tagged with `@[gcongr]` This PR does not address - `mul_left_monotone` and `mul_right_monotone` are exactly the wrong way around - `monotone_right`/`mono_right` vs `right_monotone`/`right_mono` - `monotone_arcsin` vs `arcsin_monotone` edit: TODO: `ideal_mono` and friends --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict delegated 238/171 Archive/Imo/Imo1962Q1.lean,Archive/Wiedijk100Theorems/AbelRuffini.lean,Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Counterexamples/DiscreteTopologyNonDiscreteUniformity.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Group/Basic.lean,Mathlib/Algebra/Order/Group/Finset.lean,Mathlib/Algebra/Order/Group/PosPart.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Pow.lean,Mathlib/Algebra/Order/ToIntervalMod.lean,Mathlib/Algebra/Polynomial/Degree/CardPowDegree.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Convex/Deriv.lean,Mathlib/Analysis/Normed/Order/UpperLower.lean,Mathlib/Analysis/PSeries.lean,Mathlib/Analysis/SpecialFunctions/Pow/Continuity.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Analysis/SpecificLimits/Basic.lean,Mathlib/Analysis/SpecificLimits/FloorPow.lean,Mathlib/Combinatorics/SetFamily/Kleitman.lean,Mathlib/Combinatorics/SimpleGraph/Girth.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Chunk.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Lemma.lean,Mathlib/Computability/Ackermann.lean,Mathlib/Data/ENNReal/Inv.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/Nat/Choose/Factorization.lean,Mathlib/Data/Real/Pi/Bounds.lean,Mathlib/LinearAlgebra/AffineSpace/AffineMap.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Basic.lean,Mathlib/MeasureTheory/Constructions/Polish/Basic.lean,Mathlib/MeasureTheory/MeasurableSpace/MeasurablyGenerated.lean,Mathlib/MeasureTheory/OuterMeasure/Operations.lean,Mathlib/NumberTheory/Bertrand.lean,Mathlib/NumberTheory/FermatPsp.lean,Mathlib/NumberTheory/Padics/Hensel.lean,Mathlib/Order/Concept.lean,Mathlib/Order/Filter/AtTopBot/Defs.lean,Mathlib/Order/Fin/Basic.lean,Mathlib/Order/Heyting/Basic.lean,Mathlib/Order/Heyting/Boundary.lean,Mathlib/Order/Heyting/Regular.lean,Mathlib/Order/Hom/Set.lean,Mathlib/Order/Interval/Set/Fin.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Order/UpperLower/Closure.lean,Mathlib/Probability/StrongLaw.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/DedekindDomain/Ideal.lean,Mathlib/RingTheory/FractionalIdeal/Basic.lean,Mathlib/RingTheory/FractionalIdeal/Operations.lean,Mathlib/Topology/EMetricSpace/Lipschitz.lean,Mathlib/Topology/MetricSpace/Antilipschitz.lean,Mathlib/Topology/MetricSpace/Holder.lean 59 8 ['JovanGerb', 'bryangingechen', 'github-actions', 'leanprover-community-bot-assistant', 'linesthatinterlace', 'mathlib-bors'] bryangingechen
assignee:bryangingechen
84-5188
2 months ago
84-34212
2 months ago
2-60107
2 days
21838 joneugster
author:joneugster
feat(Cache): Allow arguments of the form `Mathlib.Data` which correspond to a folder but not a file --- - [x] depends on: #21834 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI t-meta merge-conflict awaiting-author 34/11 Cache/IO.lean,Cache/Main.lean 2 11 ['eric-wieser', 'github-actions', 'joneugster', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mergify'] nobody
82-27340
2 months ago
82-27341
2 months ago
50-67617
50 days
25611 erdOne
author:erdOne
chore(RingTheory): add `Algebra (FractionRing R) (FractionRing S)` Co-authored-by: Yakov Pechersky --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
152/108 Mathlib.lean,Mathlib/Algebra/Algebra/NonZeroDivisors.lean,Mathlib/NumberTheory/RamificationInertia/Galois.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/DedekindDomain/IntegralClosure.lean,Mathlib/RingTheory/Ideal/Norm/RelNorm.lean,Mathlib/RingTheory/IntegralClosure/IntegralRestrict.lean,Mathlib/RingTheory/Localization/FractionRing.lean,Mathlib/RingTheory/Localization/FractionRingAlgebra.lean,Mathlib/RingTheory/Localization/Integral.lean 10 20 ['alreadydone', 'erdOne', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'pechersky'] nobody
80-52599
2 months ago
80-52600
2 months ago
36-35321
36 days
27310 ADedecker
author:ADedecker
chore: semilinearize LinearAlgebra.TensorProduct.Basic This PR continues the work from #24208. Original PR: https://github.com/leanprover-community/mathlib4/pull/24208 t-algebra merge-conflict
label:t-algebra$
191/138 Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Closed.lean,Mathlib/Algebra/Lie/TensorProduct.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/LinearAlgebra/BilinearForm/TensorProduct.lean,Mathlib/LinearAlgebra/BilinearMap.lean,Mathlib/LinearAlgebra/Dual/Lemmas.lean,Mathlib/LinearAlgebra/TensorPower/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Associator.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean,Mathlib/RingTheory/Coalgebra/Hom.lean 12 0 [] nobody
75-40197
2 months ago
75-40197
2 months ago
0-49
49 seconds
25284 alreadydone
author:alreadydone
feat(LinearAlgebra/Contraction): bijectivity of `dualTensorHom` + generalize to CommSemiring --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author
label:t-algebra$
167/32 Mathlib/Data/Finsupp/Defs.lean,Mathlib/LinearAlgebra/Contraction.lean,Mathlib/LinearAlgebra/Pi.lean,Mathlib/LinearAlgebra/Trace.lean,Mathlib/RingTheory/Finiteness/Finsupp.lean 5 16 ['alreadydone', 'eric-wieser', 'github-actions', 'kckennylau', 'leanprover-bot', 'leanprover-community-bot-assistant'] nobody
73-17139
2 months ago
73-17139
2 months ago
47-45899
47 days
22749 joelriou
author:joelriou
feat(CategoryTheory/Abelian): the Gabriel-Popescu theorem as a localization with respect to a Serre class This PR introduces a structure `GabrielPopescuPackage C` which contains the information to say that the abelian category `C` is a localization of a category of modules with respect to a suitable Serre class. --- - [x] depends on: #26033 - [ ] depends on: #26663 - [x] depends on: #22733 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict WIP 202/6 Mathlib.lean,Mathlib/CategoryTheory/Abelian/GrothendieckCategory/ModuleEmbedding/GabrielPopescu.lean,Mathlib/CategoryTheory/Abelian/SerreClass/Bousfield.lean,Mathlib/CategoryTheory/Abelian/SerreClass/MorphismProperty.lean,Mathlib/CategoryTheory/ObjectProperty/ContainsZero.lean 5 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
72-60425
2 months ago
72-60427
2 months ago
0-10930
3 hours
26784 eric-wieser
author:eric-wieser
chore: remove suppress_compilation Still not exhaustive. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 0/37 Mathlib/Algebra/Category/CoalgCat/ComonEquivalence.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/Colimit/DirectLimit.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/Colimit/Ring.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/Analysis/Normed/Algebra/Unitization.lean,Mathlib/Analysis/NormedSpace/Multilinear/Basic.lean,Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Basic.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Bilinear.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Completeness.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Mul.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/NNNorm.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/NormedSpace.lean,Mathlib/CategoryTheory/Abelian/Projective/Resolution.lean,Mathlib/CategoryTheory/Monoidal/Internal/Module.lean 18 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
72-32686
2 months ago
72-32687
2 months ago
0-0
0 seconds
26804 kckennylau
author:kckennylau
(WIP) feat(SetTheory): ZFSet is a model of ZFC --- Depends on: * [ ] #26644 `Mathlib/SetTheory/ZFC/Model.lean` is the main file, and it starts at Line 346. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory merge-conflict WIP 1245/0 Mathlib.lean,Mathlib/SetTheory/ZFC/Axioms.lean,Mathlib/SetTheory/ZFC/Model.lean,docs/references.bib 4 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
71-70544
2 months ago
71-70545
2 months ago
0-163
2 minutes
20428 madvorak
author:madvorak
feat(Data/Sign): lemmas about `∈ Set.range SignType.cast` --- Perhaps `in_set_range_singType_cast_iff_abs` needs to be moved somewhere downstream. t-data merge-conflict WIP 40/0 Mathlib/Data/Sign.lean 1 10 ['eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'madvorak'] nobody
71-63037
2 months ago
71-63038
2 months ago
0-0
0 seconds
26608 vihdzp
author:vihdzp
feat(SetTheory/Cardinal/Aleph): `o.card ≤ ℵ_ o` and variants --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory merge-conflict 24/0 Mathlib/SetTheory/Cardinal/Aleph.lean 1 3 ['github-actions', 'kckennylau', 'leanprover-community-bot-assistant'] nobody
70-27056
2 months ago
70-27057
2 months ago
23-63406
23 days
20029 FrederickPu
author:FrederickPu
Allow for Config attributes to be set directly Allow for Config attributes to be set directly when using initialize_simp_projection as per issue #19895 Basically modified initialize_simp_projection so that the user has the option of specifying a tuple of config option values. Ex: ``` initialize_simp_projection MulEquiv (toFun → apply, invFun → symm_apply) (fullyApplied := false) ``` These config options are then converted into projections.  --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-meta merge-conflict WIP 34/4 Mathlib/Tactic/Simps/Basic.lean 1 11 ['FrederickPu', 'YaelDillies', 'fpvandoorn', 'github-actions', 'leanprover-community-bot-assistant'] nobody
70-23737
2 months ago
70-23738
2 months ago
0-34081
9 hours
13973 digama0
author:digama0
feat: lake exe refactor, initial framework This is the initial framework code for `lake exe refactor`. To use it, you add your refactoring to `Refactor/Main.lean` (note, you have to actually write some metaprogramming code here for the refactoring itself), and the harness will run it on specified files and apply the generated edits. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict awaiting-author 139/0 Refactor/Main.lean,lakefile.lean 2 11 ['adomani', 'digama0', 'eric-wieser', 'github-actions', 'joneugster', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
66-44598
2 months ago
66-44599
2 months ago
4-80741
4 days
26498 EtienneC30
author:EtienneC30
feat: projections and injections for WithLp Introduce `WithLp.fst` and `WithLp.snd` to avoid defeq abuse by writing `x.1` when `x : WithLp p (α × β)`. Also add a `ContinuousLinearMap` version. Introduce `WithLp.inl` (resp. `WithLp.inr`) as a linear isometry from `α` (resp. β) to `WithLp p (α × β)`. Introduce `PiLp.single` as a linear isometry from `β i` to `PiLp p β`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict 107/7 Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/Normed/Lp/WithLp.lean,Mathlib/LinearAlgebra/Pi.lean 4 11 ['EtienneC30', 'b-mehta', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] nobody
64-55484
2 months ago
64-55484
2 months ago
5-313
5 days
12181 adomani
author:adomani
lint also `let` vs `have` This PR is symmetrical to #12157: here we lint for non-`Type`-valued `let`s. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict 797/544 Archive/Imo/Imo1962Q1.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Mathlib.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/DirectLimit.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/Homology/HomologicalComplexBiprod.lean,Mathlib/Algebra/Homology/HomologySequence.lean,Mathlib/Algebra/Homology/HomotopyCategory/Pretriangulated.lean,Mathlib/Algebra/Homology/Localization.lean,Mathlib/Algebra/Homology/ShortComplex/Abelian.lean,Mathlib/Algebra/Homology/ShortComplex/ConcreteCategory.lean,Mathlib/Algebra/Homology/ShortComplex/Exact.lean,Mathlib/Algebra/Homology/ShortComplex/ExactFunctor.lean,Mathlib/Algebra/Homology/ShortComplex/Homology.lean,Mathlib/Algebra/Homology/ShortComplex/LeftHomology.lean,Mathlib/Algebra/Homology/ShortComplex/Linear.lean,Mathlib/Algebra/Homology/ShortComplex/Preadditive.lean,Mathlib/Algebra/Homology/ShortComplex/PreservesHomology.lean,Mathlib/Algebra/Homology/ShortComplex/QuasiIso.lean,Mathlib/Algebra/Homology/ShortComplex/RightHomology.lean,Mathlib/Algebra/Lie/Engel.lean,Mathlib/Algebra/Lie/Killing.lean,Mathlib/Algebra/Module/PID.lean,Mathlib/Algebra/Module/Submodule/Localization.lean,Mathlib/Algebra/Module/Zlattice.lean,Mathlib/Algebra/MonoidAlgebra/Grading.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/Algebra/Polynomial/RingDivision.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiCompact.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiSeparated.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/AlgebraicGeometry/Pullbacks.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/DoldKan/Homotopies.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/FDeriv/Comp.lean,Mathlib/Analysis/Calculus/Rademacher.lean,Mathlib/Analysis/Complex/Tietze.lean,Mathlib/Analysis/Convex/Between.lean,Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/Rayleigh.lean,Mathlib/Analysis/NormedSpace/ContinuousAffineMap.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Completeness.lean,Mathlib/Analysis/NormedSpace/Spectrum.lean,Mathlib/Analysis/SpecialFunctions/Integrals.lean,Mathlib/CategoryTheory/Abelian/Basic.lean,Mathlib/CategoryTheory/Abelian/Exact.lean,Mathlib/CategoryTheory/Abelian/Pseudoelements.lean,Mathlib/CategoryTheory/Abelian/Transfer.lean,Mathlib/CategoryTheory/Adhesive.lean,Mathlib/CategoryTheory/Closed/Cartesian.lean,Mathlib/CategoryTheory/Closed/Monoidal.lean,Mathlib/CategoryTheory/Comma/Arrow.lean,Mathlib/CategoryTheory/EffectiveEpi/Extensive.lean,Mathlib/CategoryTheory/Extensive.lean,Mathlib/CategoryTheory/Functor/EpiMono.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Galois/Basic.lean,Mathlib/CategoryTheory/Galois/Decomposition.lean,Mathlib/CategoryTheory/Galois/Examples.lean,Mathlib/CategoryTheory/GradedObject/Trifunctor.lean,Mathlib/CategoryTheory/IsConnected.lean,Mathlib/CategoryTheory/Limits/ConcreteCategory.lean,Mathlib/CategoryTheory/Limits/Constructions/EpiMono.lean,Mathlib/CategoryTheory/Limits/Constructions/WeaklyInitial.lean,Mathlib/CategoryTheory/Limits/FilteredColimitCommutesFiniteLimit.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Limits/FintypeCat.lean,Mathlib/CategoryTheory/Limits/Fubini.lean,Mathlib/CategoryTheory/Limits/IsLimit.lean,Mathlib/CategoryTheory/Limits/Preserves/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/FiniteLimits.lean,Mathlib/CategoryTheory/Limits/VanKampen.lean,Mathlib/CategoryTheory/Localization/LocalizerMorphism.lean,Mathlib/CategoryTheory/Localization/Pi.lean,Mathlib/CategoryTheory/Localization/Resolution.lean,Mathlib/CategoryTheory/Monad/Monadicity.lean,Mathlib/CategoryTheory/PUnit.lean,Mathlib/CategoryTheory/Sites/Coherent/CoherentSheaves.lean,Mathlib/CategoryTheory/Sites/Coherent/RegularSheaves.lean,Mathlib/CategoryTheory/Sites/Coverage.lean,Mathlib/CategoryTheory/Sites/LeftExact.lean,Mathlib/CategoryTheory/Sites/Preserves.lean,Mathlib/CategoryTheory/Sites/Pullback.lean,Mathlib/CategoryTheory/Sites/Sheaf.lean,Mathlib/CategoryTheory/Triangulated/Pretriangulated.lean,Mathlib/Combinatorics/Colex.lean,Mathlib/Combinatorics/SetFamily/Kleitman.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/Coloring.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity.lean 271 0 [] nobody
64-54914
2 months ago
64-54914
2 months ago
0-0
0 seconds
11021 jstoobysmith
author:jstoobysmith
feat(AlgebraicTopology) : add join of augmented SSets This pull-request adds the definition of the join of augmented SSets defined as contravariant functors from `WithInitial SimplexCategory` to `Type u`. In addition it shows that the join of two standard augmented SSets is again an augmented SSets. From this the definition of the join of simplicial sets should follow easily. To aid the above theory, an api for `WithInitial SimplexCategory` has been created, with the notion of the `join` and `split` (forming a sort of inverse to join) of objects in this category are defined. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology new-contributor merge-conflict WIP 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
64-54896
2 months ago
64-54896
2 months ago
1-20125
1 day
10190 jstoobysmith
author:jstoobysmith
feat(AlgebraicTopology): add Augmented Simplex Category - Added the definition of the category FinLinOrd of finite linear ordered sets. - Added the definition of the augmented simplex category `AugmentedSimplexCategory`, and showed it is the Skeleton of FinLinOrd. - Showed that the category of augmented simplicial objects defined as a comma category is equivalent to the category of functors from `AugmentedSimplexCategory^\op` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology new-contributor t-category-theory merge-conflict WIP 720/0 Mathlib.lean,Mathlib/AlgebraicTopology/AugmentedSimplexCategory.lean,Mathlib/AlgebraicTopology/SimplicialObject.lean,Mathlib/Order/Category/FinLinOrd.lean 4 5 ['TwoFX', 'YaelDillies', 'joelriou', 'jstoobysmith'] nobody
64-54852
2 months ago
64-54852
2 months ago
7-63215
7 days
10084 alreadydone
author:alreadydone
draft for Van Kampen The part about the homotopy lifting property for covering maps has been extracted to #22649 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology merge-conflict WIP 91/24 Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/VanKampen.lean 2 1 ['leanprover-community-bot-assistant'] nobody
64-54761
2 months ago
64-54761
2 months ago
0-0
0 seconds
26303 joelriou
author:joelriou
feat(AlgebraicTopology): the fundamental lemma of homotopical algebra Given a model category `C`, the fundamental lemma of homotopical algebra (Quillen) shows that it is possible to compute morphisms in the homotopy category of `C` (the localized category with respect to weak equivalences) from `X` to `Y` as a quotient of the type of morphisms from `X` to `Y` in `C` modulo an homotopy relation, when `X` is cofibrant and `Y` is fibrant. In particular, we obtain a version of the Whitehead theorem: a weak equivalence between bifibrant objects (both cofibrant and fibrant) is a homotopy equivalence. We also show that we obtain equivalent categories if we localize `C` or various fullsubcategories (cofibrant objetss, fibrant objects, bifibrant objects) with respect to weak equivalences. (This improves the first formalization I made in 2022 in Lean 3.) (This is sorry-free, but still WIP. In order to do clean proofs, we shall also need the refactor of fullsubcategories...) --- - [x] depends on: #26171 - [x] depends on: #26166 - [x] depends on: #26365 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology large-import t-category-theory merge-conflict WIP 3174/31 Mathlib.lean,Mathlib/AlgebraicTopology/ModelCategory/Basic.lean,Mathlib/AlgebraicTopology/ModelCategory/Bifibrant.lean,Mathlib/AlgebraicTopology/ModelCategory/BrownLemma.lean,Mathlib/AlgebraicTopology/ModelCategory/CategoryWithCofibrations.lean,Mathlib/AlgebraicTopology/ModelCategory/Cylinder.lean,Mathlib/AlgebraicTopology/ModelCategory/DerivabilityStructure.lean,Mathlib/AlgebraicTopology/ModelCategory/FundamentalLemma1.lean,Mathlib/AlgebraicTopology/ModelCategory/FundamentalLemma2.lean,Mathlib/AlgebraicTopology/ModelCategory/FundamentalLemma3.lean,Mathlib/AlgebraicTopology/ModelCategory/Homotopy.lean,Mathlib/AlgebraicTopology/ModelCategory/Instances.lean,Mathlib/AlgebraicTopology/ModelCategory/IsCofibrant.lean,Mathlib/AlgebraicTopology/ModelCategory/PathObject.lean,Mathlib/CategoryTheory/Localization/CalculusOfFractions/OfAdjunction.lean,Mathlib/CategoryTheory/Localization/Opposite.lean,Mathlib/CategoryTheory/Localization/Predicate.lean,Mathlib/CategoryTheory/Localization/Quotient.lean,Mathlib/CategoryTheory/MorphismProperty/Quotient.lean 19 n/a ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
64-54687
2 months ago
unknown
unknown
20719 gio256
author:gio256
feat(AlgebraicTopology): delaborators for truncated simplicial notations We add delaborators for the following notations, introduced in #20688: - `⦋m⦌ₙ`, which denotes the `m`-dimensional simplex in the `n`-truncated simplex category. - `X _⦋m⦌ₙ`, which denotes the `m`-th term of an `n`-truncated simplicial object `X`. - `X ^⦋m⦌ₙ`, which denotes the `m`-th term of an `n`-truncated cosimplicial object `X`. If `pp.proofs` is set to `true`, we also pretty-print the proof `p : m ≤ n` for all three notations as `⦋m, p⦌ₙ`, `X _⦋m, p⦌ₙ`, and `X ^⦋m, p⦌ₙ`, respectively. Credit to @kmill for one piece of code and much metaprogramming inspiration. --- - [x] depends on: #20688 - [x] depends on: #23018 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology infinity-cosmos t-meta merge-conflict 525/33 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/AlgebraicTopology/SimplicialObject/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/SimplexCategory.lean,Mathlib/Util/Superscript.lean,MathlibTest/SimplexCategory.lean,MathlibTest/SimplicialObject.lean,MathlibTest/superscript.lean,scripts/noshake.json 11 23 ['eric-wieser', 'gio256', 'github-actions', 'kim-em', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] eric-wieser
assignee:eric-wieser
64-54658
2 months ago
64-54658
2 months ago
88-84229
88 days
26926 adomani
author:adomani
draft: `commandStart` more --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-linter merge-conflict awaiting-author WIP 3160/1085 Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/MonCat/Adjunctions.lean,Mathlib/Algebra/Divisibility/Basic.lean,Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Algebra/Group/Commute/Defs.lean,Mathlib/Algebra/Group/Commute/Units.lean,Mathlib/Algebra/Group/Hom/CompTypeclasses.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Semiconj/Basic.lean,Mathlib/Algebra/Group/Semiconj/Units.lean,Mathlib/Algebra/Group/UniqueProds/Basic.lean,Mathlib/Algebra/Homology/ComplexShape.lean,Mathlib/Algebra/Homology/Embedding/Boundary.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplex.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexShift.lean,Mathlib/Algebra/Lie/LieTheorem.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Algebra/Notation/Lemmas.lean,Mathlib/Algebra/Notation/Pi.lean,Mathlib/Algebra/Order/Antidiag/Pi.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Polynomial/CoeffList.lean,Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/Algebra/Polynomial/Sequence.lean,Mathlib/Algebra/Polynomial/Smeval.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/AlgebraicTopology/DoldKan/Degeneracies.lean,Mathlib/AlgebraicTopology/DoldKan/FunctorGamma.lean,Mathlib/AlgebraicTopology/DoldKan/Homotopies.lean,Mathlib/AlgebraicTopology/DoldKan/HomotopyEquivalence.lean,Mathlib/AlgebraicTopology/DoldKan/NCompGamma.lean,Mathlib/AlgebraicTopology/DoldKan/Normalized.lean,Mathlib/AlgebraicTopology/DoldKan/Projections.lean,Mathlib/AlgebraicTopology/DoldKan/SplitSimplicialObject.lean,Mathlib/Analysis/InnerProductSpace/Laplacian.lean,Mathlib/Analysis/Normed/Field/Lemmas.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Analysis/SpecialFunctions/Gaussian/FourierTransform.lean,Mathlib/CategoryTheory/ComposableArrows.lean,Mathlib/CategoryTheory/Extensive.lean,Mathlib/CategoryTheory/FiberedCategory/Cocartesian.lean,Mathlib/CategoryTheory/Functor/Basic.lean,Mathlib/CategoryTheory/Functor/KanExtension/Preserves.lean,Mathlib/CategoryTheory/Functor/OfSequence.lean,Mathlib/CategoryTheory/Limits/Bicones.lean,Mathlib/CategoryTheory/Limits/Constructions/Over/Products.lean,Mathlib/CategoryTheory/Limits/Final/ParallelPair.lean,Mathlib/CategoryTheory/Limits/Preserves/Bifunctor.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Kernels.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Pullbacks.lean,Mathlib/CategoryTheory/Limits/Shapes/Equalizers.lean,Mathlib/CategoryTheory/Limits/Shapes/FiniteLimits.lean,Mathlib/CategoryTheory/Limits/Shapes/Multiequalizer.lean,Mathlib/CategoryTheory/Limits/Shapes/WideEqualizers.lean,Mathlib/CategoryTheory/Limits/Types/Shapes.lean,Mathlib/CategoryTheory/Localization/Construction.lean,Mathlib/CategoryTheory/Localization/Pi.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Sites/MayerVietorisSquare.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/Computability/TuringMachine.lean,Mathlib/Control/ULiftable.lean,Mathlib/Data/Bool/Basic.lean,Mathlib/Data/Fin/Fin2.lean,Mathlib/Data/Finmap.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Finset/Insert.lean,Mathlib/Data/Finset/Lattice/Basic.lean,Mathlib/Data/Finsupp/Option.lean,Mathlib/Data/Fintype/Fin.lean,Mathlib/Data/Int/Bitwise.lean,Mathlib/Data/Int/Cast/Defs.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Chain.lean,Mathlib/Data/List/Destutter.lean,Mathlib/Data/List/Indexes.lean,Mathlib/Data/List/Nodup.lean,Mathlib/Data/List/Perm/Basic.lean,Mathlib/Data/List/Rotate.lean,Mathlib/Data/List/TakeWhile.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Multiset/UnionInter.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Cast/Defs.lean,Mathlib/Data/Nat/Cast/Order/Ring.lean,Mathlib/Data/Nat/Choose/Basic.lean,Mathlib/Data/Nat/Factorial/SuperFactorial.lean,Mathlib/Data/Nat/Fib/Basic.lean,Mathlib/Data/Nat/Find.lean,Mathlib/Data/Nat/Init.lean 266 18 ['MichaelStollBayreuth', 'adomani', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
64-54523
2 months ago
64-54523
2 months ago
0-0
0 seconds
9935 jstoobysmith
author:jstoobysmith
feat(AlgebraicTopology): add constructors for horns Added a function that given a simplicial set S and a set of n-1 simplexes satisfying certain conditions, creates a morphism in SSet from a n horn to a simplicial set S. Included also are a series of lemmas and definitions used in this construction. In particular I define a function that takes a m-simplex in a horn, and returns the smallest 'index' of face it factors through, and give a series of lemmas related to this. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology new-contributor merge-conflict awaiting-author 462/2 Mathlib/AlgebraicTopology/SimplicialSet.lean 1 15 ['YaelDillies', 'jcommelin', 'jstoobysmith', 'kim-em', 'linesthatinterlace'] nobody
64-54253
2 months ago
64-54253
2 months ago
14-58814
14 days
25914 eric-wieser
author:eric-wieser
feat: add an ext lemma for the opposite category This powers up `aesop_cat`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-CI merge-conflict awaiting-author 18/56 Mathlib/AlgebraicTopology/SimplicialObject/Basic.lean,Mathlib/CategoryTheory/Abelian/Opposite.lean,Mathlib/CategoryTheory/Category/RelCat.lean,Mathlib/CategoryTheory/GuitartExact/Opposite.lean,Mathlib/CategoryTheory/Limits/Opposites.lean,Mathlib/CategoryTheory/Limits/Shapes/Products.lean,Mathlib/CategoryTheory/Opposites.lean,Mathlib/CategoryTheory/Triangulated/Opposite/Functor.lean,Mathlib/Combinatorics/Quiver/Basic.lean 9 7 ['eric-wieser', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'robin-carlier'] nobody
64-52495
2 months ago
90-82415
2 months ago
1-77289
1 day
20208 js2357
author:js2357
feat: Define the localization of a fractional ideal at a prime ideal Define the localization of a fractional ideal at a prime ideal, and prove some basic properties. --- Alternate version of #14237 generalized to use `IsLocalization` and `IsFractionRing` rather than `Localization.AtPrime` and `FractionRing` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict WIP
label:t-algebra$
248/0 Mathlib.lean,Mathlib/RingTheory/FractionalIdeal/LocalizedAtPrime.lean 2 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
64-37738
2 months ago
64-37739
2 months ago
0-21
21 seconds
19415 vihdzp
author:vihdzp
chore: move results on `Σ i : Fin n, f i` earlier --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-CI merge-conflict 131/145 Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/Order/Antidiag/Pi.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/AlgebraicTopology/AlternatingFaceMapComplex.lean,Mathlib/Combinatorics/Enumerative/Catalan.lean,Mathlib/Combinatorics/Optimization/ValuedCSP.lean,Mathlib/Data/Fin/Tuple/NatAntidiagonal.lean,Mathlib/Data/Fin/Tuple/Reflection.lean,Mathlib/Data/Fintype/BigOperators.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/LinearAlgebra/LinearIndependent.lean 13 4 ['YaelDillies', 'github-actions', 'grunweg', 'vihdzp'] nobody
64-28040
2 months ago
305-66178
10 months ago
0-0
0 seconds
24260 plp127
author:plp127
feat(Topology): add API for Hereditarily Lindelof spaces Copies the stuff about Lindelof spaces to Hereditarily Lindelof spaces. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict awaiting-author 222/42 Mathlib/Topology/Compactness/Lindelof.lean 1 15 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'urkud'] urkud
assignee:urkud
64-7310
2 months ago
64-7311
2 months ago
29-42365
29 days
27181 ADedecker
author:ADedecker
chore: more conceptual definition of `ValuativeRel.ValueGroupWithZero` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra merge-conflict
label:t-algebra$
685/467 Mathlib.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/GroupWithZero.lean,Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/OreLocalization/NonZeroDivisors.lean,Mathlib/RingTheory/OreLocalization/Ring.lean,Mathlib/RingTheory/Valuation/ValuativeRel.lean 9 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
64-7299
2 months ago
64-7300
2 months ago
0-0
0 seconds
27608 RemyDegenne
author:RemyDegenne
feat(MeasureTheory): typeclasses for measures with finite moments WIP because it seems useful for #26291 but I want to investigate more. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability merge-conflict WIP 97/17 Mathlib.lean,Mathlib/MeasureTheory/Measure/Typeclasses/FiniteMoments.lean,Mathlib/Probability/Moments/CovarianceBilin.lean 3 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
63-42175
2 months ago
63-42176
2 months ago
0-1
1 second
26306 j-loreaux
author:j-loreaux
refactor: make `IsSelfAdjoint` and `IsIdempotentElem` one-field structures. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict 222/224 Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/DirectSum/Idempotents.lean,Mathlib/Algebra/Group/Idempotent.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/GroupWithZero/Idempotent.lean,Mathlib/Algebra/Order/Ring/Idempotent.lean,Mathlib/Algebra/Order/Ring/Star.lean,Mathlib/Algebra/Order/Star/Basic.lean,Mathlib/Algebra/Ring/BooleanRing.lean,Mathlib/Algebra/Ring/Idempotent.lean,Mathlib/Algebra/Star/Module.lean,Mathlib/Algebra/Star/SelfAdjoint.lean,Mathlib/Algebra/Star/StarProjection.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/AlgebraicGeometry/Morphisms/FormallyUnramified.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/CStarAlgebra/Module/Defs.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/LinearPMap.lean,Mathlib/Analysis/InnerProductSpace/Positive.lean,Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Analysis/Normed/Algebra/Exponential.lean,Mathlib/Analysis/NormedSpace/MStructure.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Data/Complex/Module.lean,Mathlib/LinearAlgebra/Matrix/Hermitian.lean,Mathlib/LinearAlgebra/Matrix/HermitianFunctionalCalculus.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/LinearAlgebra/Projection.lean,Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/NumberTheory/NumberField/Completion.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Basic.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Embeddings.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Ramification.lean,Mathlib/RingTheory/DedekindDomain/Ideal.lean,Mathlib/RingTheory/Filtration.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/IdempotentFG.lean,Mathlib/RingTheory/Ideal/Span.lean,Mathlib/RingTheory/Idempotents.lean,Mathlib/RingTheory/Localization/Away/Basic.lean,Mathlib/RingTheory/Spectrum/Prime/Topology.lean,Mathlib/RingTheory/Unramified/Field.lean,Mathlib/RingTheory/Unramified/Finite.lean,Mathlib/RingTheory/Unramified/Pi.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean 48 6 ['github-actions', 'j-loreaux', 'leanprover-community-bot-assistant', 'themathqueen'] nobody
63-41941
2 months ago
64-74420
2 months ago
37-45446
37 days
25726 tb65536
author:tb65536
(WIP) Galois group of `x ^ n - x - 1` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra merge-conflict WIP
label:t-algebra$
512/145 Archive/Wiedijk100Theorems/AbelRuffini.lean,Mathlib/RingTheory/Polynomial/Selmer.lean 2 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
61-63265
2 months ago
61-63265
2 months ago
0-1
1 second
26344 mans0954
author:mans0954
feature(Analysis/NormedSpace/MStructure): The component projections on WithLp 1 (α × β) are L-projections This PR continues the work from #20380. Original PR: https://github.com/leanprover-community/mathlib4/pull/20380 file-removed t-analysis merge-conflict WIP 20/1 Mathlib.lean,Mathlib/Analysis/Normed/Lp/MStructure.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean 3 3 ['github-actions', 'mans0954', 'mathlib4-merge-conflict-bot'] nobody
61-63017
2 months ago
61-63018
2 months ago
5-43696
5 days
27870 grunweg
author:grunweg
draft: commandStart more --- fixing grounds A version of #26926 where I can slowly work towards fixing some violations. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict WIP 2981/906 Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Divisibility/Basic.lean,Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Algebra/Group/Commute/Defs.lean,Mathlib/Algebra/Group/Hom/CompTypeclasses.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Semiconj/Basic.lean,Mathlib/Algebra/Group/Semiconj/Units.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplex.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexShift.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Algebra/Notation/Pi.lean,Mathlib/Algebra/Order/Antidiag/Pi.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/Algebra/Polynomial/Sequence.lean,Mathlib/Algebra/Polynomial/Smeval.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Analysis/InnerProductSpace/Laplacian.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Analysis/SpecialFunctions/Gaussian/FourierTransform.lean,Mathlib/CategoryTheory/FiberedCategory/Cocartesian.lean,Mathlib/CategoryTheory/Functor/Basic.lean,Mathlib/CategoryTheory/Functor/KanExtension/Preserves.lean,Mathlib/CategoryTheory/Limits/Preserves/Bifunctor.lean,Mathlib/CategoryTheory/Limits/Types/Shapes.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.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/Computability/TuringMachine.lean,Mathlib/Control/ULiftable.lean,Mathlib/Data/Bool/Basic.lean,Mathlib/Data/Fin/Fin2.lean,Mathlib/Data/Finmap.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Finset/Lattice/Basic.lean,Mathlib/Data/Fintype/Fin.lean,Mathlib/Data/Int/Bitwise.lean,Mathlib/Data/Int/Cast/Defs.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Chain.lean,Mathlib/Data/List/Destutter.lean,Mathlib/Data/List/Indexes.lean,Mathlib/Data/List/Nodup.lean,Mathlib/Data/List/Perm/Basic.lean,Mathlib/Data/List/Rotate.lean,Mathlib/Data/List/TakeWhile.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Multiset/UnionInter.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Cast/Defs.lean,Mathlib/Data/Nat/Choose/Basic.lean,Mathlib/Data/Nat/Factorial/SuperFactorial.lean,Mathlib/Data/Nat/Log.lean,Mathlib/Data/Option/Basic.lean,Mathlib/Data/PSigma/Order.lean,Mathlib/Data/Part.lean,Mathlib/Data/Prod/Basic.lean,Mathlib/Data/Real/Pi/Bounds.lean,Mathlib/Data/Seq/Computation.lean,Mathlib/Data/Seq/Seq.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Defs.lean,Mathlib/Data/Set/Function.lean,Mathlib/Data/Sigma/Order.lean,Mathlib/Data/Stream/Init.lean,Mathlib/Data/Sum/Basic.lean,Mathlib/Data/Sym/Sym2.lean,Mathlib/Data/TypeVec.lean,Mathlib/Data/Vector/Basic.lean,Mathlib/Geometry/Manifold/PoincareConjecture.lean,Mathlib/Geometry/Manifold/VectorBundle/SmoothSection.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/GroupTheory/CoprodI.lean,Mathlib/GroupTheory/Coxeter/Basic.lean,Mathlib/GroupTheory/Coxeter/Inversion.lean,Mathlib/GroupTheory/Coxeter/Length.lean,Mathlib/GroupTheory/FixedPointFree.lean,Mathlib/GroupTheory/GroupAction/Blocks.lean,Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/GroupTheory/GroupAction/Primitive.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfFixingSubgroup.lean,Mathlib/GroupTheory/HNNExtension.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/GroupTheory/Perm/Centralizer.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean,Mathlib/GroupTheory/Perm/DomMulAct.lean,Mathlib/GroupTheory/PushoutI.lean,Mathlib/GroupTheory/SpecificGroups/Dihedral.lean,Mathlib/GroupTheory/SpecificGroups/Quaternion.lean,Mathlib/LinearAlgebra/BilinearForm/TensorProduct.lean,Mathlib/LinearAlgebra/CliffordAlgebra/EvenEquiv.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Prod.lean,Mathlib/LinearAlgebra/Eigenspace/Matrix.lean 202 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
61-59174
2 months ago
61-59175
2 months ago
0-0
0 seconds
27445 erdOne
author:erdOne
chore(RingTheory/LocalRing): fix problematic instance We shouldn't use `RingHom.toAlgebra` for `Algebra (ResidueField R) (ResidueField S)`. The smul should come from the smul field in `Algebra`. - Redefined `Algebra (ResidueField R) (ResidueField S)` via `Ideal.Quotient.algebraOfLiesOver`, and provided missing `IsScalarTower` instances for it. - Added missing `IsScalarTower` for `Localization.AtPrime`. - Removed `Algebra p.ResidueField q.ResidueField` and the `IsScalarTower` instances coming with it (because there are `inferInstance` now) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
37/37 Mathlib/Algebra/Order/Archimedean/Submonoid.lean,Mathlib/RingTheory/LocalRing/ResidueField/Algebraic.lean,Mathlib/RingTheory/LocalRing/ResidueField/Basic.lean,Mathlib/RingTheory/LocalRing/ResidueField/Ideal.lean,Mathlib/RingTheory/LocalRing/ResidueField/Instances.lean,Mathlib/RingTheory/Localization/AtPrime.lean,Mathlib/RingTheory/Unramified/LocalRing.lean 7 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
61-27307
2 months ago
61-27307
2 months ago
9-82484
9 days
27267 JovanGerb
author:JovanGerb
chore(Order): refactor in preparation for `to_dual` WIP --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict 60/52 Mathlib/Data/Nat/Find.lean,Mathlib/Order/Basic.lean,Mathlib/Order/Defs/LinearOrder.lean,Mathlib/Order/Defs/PartialOrder.lean,Mathlib/Tactic/Linarith/Frontend.lean,Mathlib/Tactic/Positivity/Core.lean 6 2 ['github-actions', 'leanprover-community-bot-assistant'] bryangingechen
assignee:bryangingechen
60-61871
1 month ago
60-61876
1 month ago
0-0
0 seconds
26383 eric-wieser
author:eric-wieser
feat: `Real.sin_eq_one_iff` and similar --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict 155/101 Mathlib/Algebra/ModEq.lean,Mathlib/Analysis/SpecialFunctions/Complex/Log.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Complex.lean 5 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
60-61403
1 month ago
60-61403
1 month ago
0-0
0 seconds
25991 Multramate
author:Multramate
feat(AlgebraicGeometry/EllipticCurve): generalise nonsingular condition This PR continues the work from #25219. Original PR: https://github.com/leanprover-community/mathlib4/pull/25219 t-algebraic-geometry merge-conflict 2127/1561 Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/Module/PID.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Point.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Point.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Span.lean 15 n/a ['github-actions', 'leanprover-community-bot-assistant'] nobody
60-61285
1 month ago
unknown
unknown
25985 Multramate
author:Multramate
feat(AlgebraicGeometry/EllipticCurve/Jacobian): add equivalences between points and explicit WithZero types This PR continues the work from #14923. Original PR: https://github.com/leanprover-community/mathlib4/pull/14923 t-algebraic-geometry merge-conflict 262/66 Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian.lean,scripts/style-exceptions.txt 4 1 ['Multramate'] nobody
60-61273
1 month ago
60-61273
1 month ago
0-48
48 seconds
25984 Multramate
author:Multramate
feat(AlgebraicGeometry/EllipticCurve/Affine): add equivalences between points and explicit WithZero types This PR continues the work from #14627. Original PR: https://github.com/leanprover-community/mathlib4/pull/14627 t-algebraic-geometry merge-conflict 159/52 Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean 2 1 ['Multramate'] nobody
60-61269
1 month ago
60-61269
1 month ago
0-55
55 seconds
25983 Multramate
author:Multramate
feat(AlgebraicGeometry/EllipticCurve/Scheme): define the affine scheme associated to an elliptic curve This PR continues the work from #14130. Original PR: https://github.com/leanprover-community/mathlib4/pull/14130 t-algebraic-geometry merge-conflict 557/22 Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Scheme.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean 6 1 ['Multramate'] nobody
60-61264
1 month ago
60-61264
1 month ago
0-0
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25982 Multramate
author:Multramate
feat(AlgebraicGeometry/EllipticCurve/Group): compute range of baseChange This PR continues the work from #10142. Original PR: https://github.com/leanprover-community/mathlib4/pull/10142 t-algebraic-geometry merge-conflict 421/212 Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Weierstrass.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/Subgroup/Basic.lean,Mathlib/GroupTheory/Submonoid/Operations.lean 6 1 ['Multramate'] nobody
60-61259
1 month ago
60-61259
1 month ago
0-57
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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 merge-conflict 81/12 Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/Subgroup/Basic.lean,Mathlib/GroupTheory/Submonoid/Operations.lean 3 0 [] nobody
60-61253
1 month ago
60-61253
1 month ago
0-52
52 seconds
25980 Multramate
author:Multramate
feat(GroupTheory/Submonoid/Operations): define homomorphisms of subgroups induced by homomorphisms of groups This PR continues the work from #10113. Original PR: https://github.com/leanprover-community/mathlib4/pull/10113 t-group-theory merge-conflict 29/6 Mathlib/GroupTheory/Subgroup/Basic.lean,Mathlib/GroupTheory/Submonoid/Operations.lean 2 0 [] nobody
60-61248
1 month ago
60-61248
1 month ago
0-54
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25485 VTrelat
author:VTrelat
feat(SetTheory/ZFC/Naturals): define natural numbers in ZFC Extend the model of ZFC with naturals: - define a set `Nat` of naturals following the usual construction (∅, {∅}, {∅, {∅}}, ...) - define a proper type `ZFNat` representing naturals - add theorems on usual algebraic properties of naturals - provide a recursor and induction schemes to define/prove by induction --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depend on: #25483 t-set-theory new-contributor merge-conflict 2095/0 Mathlib/Data/Set/Prod.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Booleans.lean,Mathlib/SetTheory/ZFC/Naturals.lean 4 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
60-61073
1 month ago
60-61073
1 month ago
29-51653
29 days
25474 adomani
author:adomani
test for .lean/.md check A test PR for #25473. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-linter merge-conflict 10/1 .github/workflows/lint_and_suggest_pr.yml,Mathlib.lean,Mathlib/NumberTheory/NumberField/CMField.Lean 3 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
60-61062
1 month ago
60-61062
1 month ago
29-67280
29 days
25425 Paul-Lez
author:Paul-Lez
feat(LinearAlgebra/Basis/HasCanonicalBasis): propose `HasCanonicalBasis` class Context: in some cases, e.g. writing down PDEs, having a notion of partial derivatives can be useful. In an ideal world (as mentioned by @ocfnash in [this Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Partial.20derivatives/with/463936246)), one could write something along the lines of `open scoped PartialDerivatives` in order to access nice notation for this. This PR introduces a notion of a canonical basis for a module in order to allow taking partial derivatives with respect to it. A later PR (which I am about open) would then propose a notation for taking partial derivatives (defined using `lineDeriv` in order to avoid requiring Frechet-differentiability assumptions). The goal here is to have notation that works equally well on e.g. `𝕜 × 𝕜` and `EuclideanSpace 𝕜 (Fin 2)` and so on. I've opened this PR as a draft in order to get some initial feedback on the content (and whether this is considered appropriate for Mathlib!); the file itself would need to be split (e.g. the instances defined should probably go in different files) Co-authored-by: Eric Wieser --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
105/0 Mathlib.lean,Mathlib/LinearAlgebra/Basis/HasCanonicalBasis.lean 2 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
60-61053
1 month ago
60-61053
1 month ago
0-0
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25362 adomani
author:adomani
feat: a linter for duplicated `open` This linter warns when a namespace is repeated. It makes an effort to report only the problematic namespaces, but is not especially robust. The linter has some awareness of the `namespace` command, so ```lean def X.Y := 0 open X namespace X open Y ``` will flag both `namespace X` and `open Y` as problematic, even though it was the `open `X` that became redundant with `namespace X`. However, I will not have much time to devote to polishing this and there are quite a few exception in Mathlib before a better version could be seriously considered for adoption. [#mathlib4 > linter requests @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/linter.20requests/near/520273644) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-linter merge-conflict please-adopt 191/94 Mathlib.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/GroupWithZero/Pi.lean,Mathlib/Algebra/Order/Ring/InjSurj.lean,Mathlib/CategoryTheory/Functor/ReflectsIso/Basic.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Finite/Defs.lean,Mathlib/Data/Ineq.lean,Mathlib/Data/List/Lemmas.lean,Mathlib/Data/List/NatAntidiagonal.lean,Mathlib/Data/Nat/Choose/Basic.lean,Mathlib/Data/Nat/Prime/Basic.lean,Mathlib/Data/Nat/Prime/Defs.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Init.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/Embedding/Set.lean,Mathlib/Logic/Pairwise.lean,Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/Order/WithBot.lean,Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ApplyFun.lean,Mathlib/Tactic/Bound.lean,Mathlib/Tactic/CongrM.lean,Mathlib/Tactic/Find.lean,Mathlib/Tactic/Lift.lean,Mathlib/Tactic/Linarith/Oracle/FourierMotzkin.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/DupOpen.lean,Mathlib/Tactic/NormNum/PowMod.lean,Mathlib/Tactic/Recover.lean,Mathlib/Tactic/ReduceModChar.lean,Mathlib/Tactic/Widget/Calc.lean,Mathlib/Tactic/Widget/SelectInsertParamsClass.lean,Mathlib/Tactic/Widget/StringDiagram.lean,Mathlib/Topology/CWComplex/Abstract/Basic.lean,Mathlib/Topology/ContinuousMap/Interval.lean,Mathlib/Topology/Germ.lean,Mathlib/Topology/Homotopy/HSpaces.lean,Mathlib/Topology/Order/LowerUpperTopology.lean,Mathlib/Topology/Order/PartialSups.lean,Mathlib/Topology/Separation/DisjointCover.lean,Mathlib/Topology/Sheaves/Sheafify.lean,Mathlib/Util/CountHeartbeats.lean,MathlibTest/DupOpen.lean 47 14 ['adomani', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
60-61048
1 month ago
60-61048
1 month ago
0-0
0 seconds
25238 Hagb
author:Hagb
feat(Tactic/ComputeDegree): add support for scalar multiplication with different types It would be able to deal with `a • (X : R[X])` where `a : S` is in a different type `S` with `[SMulZeroClass S R]`. --- - [x] depends on: #25237 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-meta merge-conflict 17/5 Mathlib/Tactic/ComputeDegree.lean,MathlibTest/ComputeDegree.lean 2 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
60-61043
1 month ago
60-61043
1 month ago
38-26044
38 days
17145 Command-Master
author:Command-Master
feat(Archive/Ioi/Ioi2024Q2): a proof of the solution of question 2 from IOI 2024. --- - [x] depends on: #17189 - [x] depends on: #17190 - [x] depends on: #17191 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import IMO merge-conflict WIP 1013/1 Archive.lean,Archive/Ioi/Ioi2024Q2.lean,Mathlib.lean,Mathlib/Combinatorics/Orbits.lean,Mathlib/Data/List/SplitLengths.lean,Mathlib/Data/List/Transpose.lean,Mathlib/Data/List/Zip.lean,Mathlib/Data/Vector/Basic.lean,Mathlib/Data/Vector/Defs.lean,Mathlib/Data/Vector/MapLemmas.lean,Mathlib/Data/Vector/Transpose.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/Logic/Function/Iterate.lean,Mathlib/Order/Antisymmetrization.lean,Mathlib/Order/Partition/Finpartition.lean 15 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
60-61003
1 month ago
60-61003
1 month ago
0-0
0 seconds
14137 mattrobball
author:mattrobball
chore(Algebra.Basic): postpone importing algebra instances for `Nat`, `Int`, and `Rat` This should help typeclass synthesis by avoiding these instances unless absolutely necessary. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
678/356 Counterexamples/Pseudoelement.lean,Mathlib.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom/Basic.lean,Mathlib/Algebra/Algebra/Hom/Int.lean,Mathlib/Algebra/Algebra/Hom/Nat.lean,Mathlib/Algebra/Algebra/Hom/Rat.lean,Mathlib/Algebra/Algebra/Int.lean,Mathlib/Algebra/Algebra/Nat.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Prod.lean,Mathlib/Algebra/Algebra/Rat.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Int.lean,Mathlib/Algebra/Algebra/Subalgebra/Nat.lean,Mathlib/Algebra/Algebra/Subalgebra/Unitization.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/FreeAlgebra.lean,Mathlib/Algebra/Group/AddChar.lean,Mathlib/Algebra/Module/Bimodule.lean,Mathlib/Algebra/Module/Zlattice/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MvPolynomial/Counit.lean,Mathlib/Algebra/MvPolynomial/NatInt.lean,Mathlib/Algebra/MvPolynomial/Supported.lean,Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Polynomial/DenomsClearable.lean,Mathlib/Algebra/Polynomial/Int.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/Analysis/NormedSpace/Basic.lean,Mathlib/CategoryTheory/Galois/Examples.lean,Mathlib/Data/Complex/Module.lean,Mathlib/Data/Real/Irrational.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/FieldTheory/SplittingField/Construction.lean,Mathlib/LinearAlgebra/Matrix/Adjugate.lean,Mathlib/LinearAlgebra/Prod.lean,Mathlib/NumberTheory/ClassNumber/AdmissibleAbs.lean,Mathlib/NumberTheory/NumberField/Basic.lean,Mathlib/NumberTheory/NumberField/Embeddings.lean,Mathlib/RingTheory/Adjoin/Basic.lean,Mathlib/RingTheory/Adjoin/FG.lean,Mathlib/RingTheory/Adjoin/NatInt.lean,Mathlib/RingTheory/AlgebraTower.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/Coalgebra/Hom.lean,Mathlib/RingTheory/IntegralClosure.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/FractionRing.lean,Mathlib/RingTheory/Localization/FractionRingInt.lean,Mathlib/RingTheory/Localization/Int.lean,Mathlib/RingTheory/Localization/Nat.lean,Mathlib/RingTheory/Polynomial/GaussLemma.lean,Mathlib/RingTheory/Polynomial/Pochhammer.lean,Mathlib/RingTheory/PowerSeries/WellKnown.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/WittVector/MulCoeff.lean,Mathlib/Topology/Algebra/Algebra.lean,Mathlib/Topology/Instances/Real.lean,test/infer_instance.lean,test/instance_diamonds.lean 64 7 ['fpvandoorn', 'github-actions', 'grunweg', 'leanprover-bot', 'mattrobball'] nobody
60-60999
1 month ago
60-60999
1 month ago
0-0
0 seconds
11632 mattrobball
author:mattrobball
chore(Group/RingTheory.Congruence): make `Quotient`'s reducible These are essentially wrappers and should not expose any data when made reducible. Their use in constructing typeclass instances makes reducible transparency desirable. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory merge-conflict 16/35 Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/RingTheory/Congruence/Basic.lean 2 14 ['eric-wieser', 'fpvandoorn', 'github-actions', 'grunweg', 'kmill', 'leanprover-bot', 'mattrobball'] nobody
60-60990
1 month ago
60-60990
1 month ago
2-10495
2 days
3171 eric-wieser
author:eric-wieser
refactor: make the algebra hierarchy use flat structures By introducing a `FlatHack` base class and using it as the first parent of every algebra typeclass, it causes the typeclasses to all overlap and so we emulate flat structures. Most of the pain here comes from `to_additive` not generating any of the ancestor projections properly; this was already a bug present for `n + 1` parents, but now the `1` is taken up This is one workaround for leanprover/lean4#2074: don't let the eta-diamonds appear in the first place. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict WIP
label:t-algebra$
328/240 .github/workflows/build.yml,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Category/GroupCat/Basic.lean,Mathlib/Algebra/Category/GroupCat/EquivalenceGroupAddGroup.lean,Mathlib/Algebra/Category/MonCat/FilteredColimits.lean,Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/GroupPower/Lemmas.lean,Mathlib/Algebra/Hom/Group.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/Order/Chebyshev.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Module.lean,Mathlib/Algebra/Order/Rearrangement.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Quandle.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/TrivSqZeroExt.lean,Mathlib/CategoryTheory/Endomorphism.lean,Mathlib/CategoryTheory/Preadditive/Basic.lean,Mathlib/CategoryTheory/Preadditive/SingleObj.lean,Mathlib/Data/Finsupp/Multiset.lean,Mathlib/Data/Int/LeastGreatest.lean,Mathlib/Data/Int/Order/Basic.lean,Mathlib/Data/Int/Order/Lemmas.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/Data/Real/CauSeqCompletion.lean,Mathlib/Data/ZMod/Defs.lean,Mathlib/LinearAlgebra/AffineSpace/Ordered.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/RingTheory/Ideal/Quotient.lean,Mathlib/Tactic/Positivity/Core.lean,Mathlib/Tactic/Ring/Basic.lean 42 14 ['eric-wieser', 'gebner', 'harahu'] nobody
60-60985
1 month ago
60-60985
1 month ago
0-0
0 seconds
27643 ADedecker
author:ADedecker
Ad bdd unif conv --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 111/26 Mathlib/Analysis/LocallyConvex/Bounded.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean,Mathlib/Topology/Algebra/Module/UniformConvergence.lean,Mathlib/Topology/Bornology/Absorbs.lean 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
60-39762
1 month ago
60-39762
1 month ago
0-0
0 seconds
26385 jjdishere
author:jjdishere
feat(RingTheory/Perfectoid): define integral perfectoid rings This PR continues the work from #22331. Original PR: https://github.com/leanprover-community/mathlib4/pull/22331 t-ring-theory merge-conflict WIP 1081/15 Mathlib.lean,Mathlib/Algebra/Ring/Aut.lean,Mathlib/FieldTheory/Perfect.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Quotient/Defs.lean,Mathlib/RingTheory/Ideal/Quotient/PowTransition.lean,Mathlib/RingTheory/Perfection.lean,Mathlib/RingTheory/Perfectoid/BDeRham.lean,Mathlib/RingTheory/Perfectoid/FontaineTheta.lean,Mathlib/RingTheory/Perfectoid/IntergalPerfectoid.lean,Mathlib/RingTheory/Perfectoid/Untilt.lean,Mathlib/RingTheory/WittVector/Basic.lean,Mathlib/RingTheory/WittVector/Complete.lean,Mathlib/RingTheory/WittVector/TeichmullerSeries.lean,docs/references.bib 16 3 ['github-actions', 'jjdishere', 'leanprover-community-bot-assistant'] nobody
59-63470
1 month ago
59-63471
1 month ago
0-79
1 minute
22898 AntoineChambert-Loir
author:AntoineChambert-Loir
feat(RingTheory/TensorProduct/DirectLimit/FG): direct limit of finitely generated submodules and tensor product --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict WIP 399/0 Mathlib.lean,Mathlib/RingTheory/Adjoin/FG.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/DirectLimit/FG.lean 5 9 ['AntoineChambert-Loir', 'alreadydone', 'github-actions', 'leanprover-community-bot-assistant'] nobody
59-63130
1 month ago
59-63130
1 month ago
11-9349
11 days
21255 chrisflav
author:chrisflav
feat(RingTheory/Smooth): smooth is equivalent to locally standard smooth This is only a container to not lose the branch name. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 1740/11 Mathlib.lean,Mathlib/RingTheory/Kaehler/Localization.lean,Mathlib/RingTheory/Presentation.lean,Mathlib/RingTheory/Smooth/FreeKaehler.lean,Mathlib/RingTheory/Smooth/StandardSmoothCotangent.lean,Mathlib/RingTheory/Smooth/StandardSmoothSmooth.lean 6 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
59-63093
1 month ago
59-63093
1 month ago
0-0
0 seconds
20431 erdOne
author:erdOne
feat(RingTheory/AdicCompletion): monotonicity of adic-completeness --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict awaiting-author 206/16 Mathlib.lean,Mathlib/Algebra/Module/Submodule/Defs.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Mono.lean,Mathlib/RingTheory/Finiteness/Ideal.lean 7 13 ['chrisflav', 'erdOne', 'github-actions'] nobody
59-63086
1 month ago
59-63086
1 month ago
35-86379
35 days
20424 erdOne
author:erdOne
feat(RingTheory): evaluation of power series --- - [ ] depends on: #20425 - [x] depends on: #20426 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 425/8 Mathlib.lean,Mathlib/RingTheory/AdicCompletion/Noetherian.lean,Mathlib/RingTheory/Filtration.lean,Mathlib/RingTheory/PowerSeries/Basic.lean,Mathlib/RingTheory/PowerSeries/Eval.lean,Mathlib/RingTheory/PowerSeries/Trunc.lean 6 11 ['AntoineChambert-Loir', 'alreadydone', 'erdOne', 'eric-wieser', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
59-63079
1 month ago
59-63079
1 month ago
0-3944
1 hour
19596 Command-Master
author:Command-Master
feat(RingTheory/Valuation/PrimeMultiplicity): define `WithTop ℤ`-valued prime multiplicity on a fraction field Moves: - `multiplicity_addValuation` -> `AddValuation.multiplicity` - `multiplicity_addValuation_apply` -> `AddValuation.multiplicity_apply` --- - [x] depends on: #19149 - [x] depends on: #18786 - [x] depends on: #19122 - [x] depends on: #18954 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import merge-conflict awaiting-author 101/37 Mathlib/Data/ENat/Basic.lean,Mathlib/RingTheory/DiscreteValuationRing/Basic.lean,Mathlib/RingTheory/Valuation/PrimeMultiplicity.lean 3 11 ['ChrisHughes24', 'Command-Master', 'Vierkantor', 'faenuccio', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
59-63071
1 month ago
59-63071
1 month ago
8-2214
8 days
18646 jxjwan
author:jxjwan
feat(RingTheory): isotypic components --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor merge-conflict 308/0 Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/RingTheory/Isotypic.lean,Mathlib/RingTheory/SimpleModule.lean 3 1 ['github-actions'] nobody
59-63064
1 month ago
59-63064
1 month ago
20-16585
20 days
17246 pechersky
author:pechersky
feat(RingTheory/PrimaryDecomposition): PIR of Noetherian under jacobson condition --- - [x] depends on: #17634 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict awaiting-author 653/1 Mathlib.lean,Mathlib/NumberTheory/KummerDedekind.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/PrimaryDecomposition.lean,docs/references.bib 8 8 ['erdOne', 'github-actions', 'mathlib4-dependent-issues-bot'] erdOne
assignee:erdOne
59-63058
1 month ago
59-63058
1 month ago
13-7138
13 days
12744 chrisflav
author:chrisflav
feat(RingTheory/Smooth): Noetherian ring of definition We show that given a smooth `A`-algebra `B`, there exists a subring `A₀` of `A` of finite type over `ℤ` and a smooth `A₀`-algebra `B₀` such that `B = A ⊗[A₀] B₀`. A reference is https://stacks.math.columbia.edu/tag/00TP. This is also a test case for the ring of definition API. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 1212/0 Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/RingTheory/FiniteType.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,Mathlib/RingTheory/RingOfDefinition/BaseChange.lean,Mathlib/RingTheory/RingOfDefinition/Basic.lean,Mathlib/RingTheory/RingOfDefinition/Relations.lean,Mathlib/RingTheory/Smooth/Descent.lean,Mathlib/ToBeMoved.lean 10 0 [] nobody
59-63033
1 month ago
59-63033
1 month ago
0-0
0 seconds
12743 chrisflav
author:chrisflav
feat(RingTheory/RingOfDefinition): basic API Given a finitely presented algebra `A` over a ring `R`, we may descend to a Noetherian subring `R₀` of `R` and a model of `A` over `R₀`. In this PR we provide basic API for working with polynomial rings over subrings. In particular we provide infrastructure for producing `R₀` and descending polynomials in `R` to polynomials in `R₀` given containment of the coefficients. Notation: `R` is a ring, `R₀` a subring, `p : MvPolynomial ι R` and `s : Set (MvPolynomial ι R)`. ## Main definitions For producing subrings containing a set of polynomials of interest, we provide the following: - `HasCoefficients p R₀`: typeclass expressing that the coefficients of `p` are contained in `R₀`. - `core s`: adjoin the coefficients of a set of polynomials `s` to `ℤ`. - `adjoinCoefficients s R₀`: adjoin the coefficients of a set of polynomials `s` to `R₀`. - `repr p R₀`: Given `[HasCoefficients p R₀]` and a polynomial `p`, this is the representative of `p` as a polynomial over `R₀`. Instances for `HasCoefficients` are provided to ensure that the following facts are automatically inferred: - the coefficients of any polynomial in `s` are contained in `core s`. - if the coefficients of `p` are in `R₀` and we adjoin the coefficients of `s`, then the coefficients of `p` are also in `adjoinCoefficients s R₀`. Now, given a (finitely) presented `R` algebra, expressed through an ideal `I : Ideal R`, a `Model` of `I` is a structure containing - a set `s` of generators of `I` - a subring `R₀` - a proof that the coefficients of `s` are contained in `R₀` Given such a model `M`, we expose: - `M.s₀`: the intersection of `s` with `MvPolynomial ι R₀`. Informally this is simply `s`. - `M.I₀`: the ideal generated by `M.s₀` - `M.A₀`: the quotient `MvPolynomial ι M.R₀ ⧸ MvPolynomial ι M.I₀` In `RingOfDefinition/BaseChange` we show that `R ⊗[R₀] M.A₀` is `R`-isomorphic to `MvPolynomial ι R ⧸ I` (this is done in a more general setting and then specialized to this situation). Since `M.I₀` is not equal to `I` intersected with `R₀`, more technical difficulties arise. To work around these, we introduce - `Relation A`: For an arbitrary `A : Set R`, this is simply `MvPolynomial A R`. In the following we are particularly interested in the case where `A = s = Set (MvPolynomial ι R)` is a set of generators of `I`. An equation `x = y` in `MvPolynomial ι R ⧸ I` can be expressed as `x - y ∈ I`. In this case there exists a `r : Relation s` such that `eval r = x - y`. Here `eval` is a shortcut for `MvPolynomial.eval Subtype.val`, i.e. we evaluate the formal expression `r` in the ring `MvPolynomial ι R`. To preserve this equation in `MvPolynomial ι R₀ ⧸ I₀`, we need to adjoin the coefficients of `r` to `R₀`. For this a similar API is provided, in particular: - `HasRelation r R₀`: a typeclass expressing that the coefficients of `r` are contained in `R₀`. - `adjoinRelations rs R₀`: adjoin the coefficients of a set of relations to `R₀`. - `repr r M`: Given `[HasRelation r M.R₀]`, this is the representative of `r` over `R₀`, i.e. an element of `Relation M.s₀` that is mapped to `r` under the canonical map `Relation M.s₀ → Relation M.s`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 797/0 Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/RingTheory/FiniteType.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,Mathlib/RingTheory/RingOfDefinition/BaseChange.lean,Mathlib/RingTheory/RingOfDefinition/Basic.lean 7 0 [] nobody
59-63025
1 month ago
59-63025
1 month ago
0-0
0 seconds
12695 chrisflav
author:chrisflav
feat(RingTheory/Smooth): smooth morphisms are flat We show that smooth ring homomorphisms are flat. The strategy for a smooth `A`-algebra `B` is the following: - first we find a model of `B` over a Noetherian base ring - if `A` is Noetherian, we identify `B` as a retract of the adic completion of a polynomial ring over `A`, which is flat This is the summary PR which will be split in several parts. Co-authored-by: Judith Ludwig --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 2767/1 Mathlib.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/Exact.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/LinearAlgebra/SModEq.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/AdicCompletion/AsTensorProduct.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Exactness.lean,Mathlib/RingTheory/AdicCompletion/Functoriality.lean,Mathlib/RingTheory/RingOfDefinition.lean,Mathlib/RingTheory/RingOfDefinition/RingModel.lean,Mathlib/RingTheory/RingOfDefinition/Utils.lean,Mathlib/RingTheory/RingOfDefinitionIdeal.lean,Mathlib/RingTheory/Smooth/Descent.lean,Mathlib/RingTheory/Smooth/Flat.lean 16 0 [] nobody
59-63017
1 month ago
59-63017
1 month ago
0-0
0 seconds
12294 AntoineChambert-Loir
author:AntoineChambert-Loir
feat(Mathlib.RingTheory.TensorProduct.Polynomial) : tensor product of a (univariate) polynomial ring We define a linear equivalence of a polynomial ring by a module with a finsupp type. We prove lemmas that allow to manipulate this equivalence. This is adapted from the content of #12293, but since `Polynomial` is a structure containing a `Finsupp`, these functions can't be applied directly to `Polynomial`. Some linear equivs need to be added to mathlib for that. --- - [x] depends on: #12293 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict WIP 484/0 Mathlib.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean,Mathlib/RingTheory/TensorProduct/Polynomial.lean 7 1 ['leanprover-community-mathlib4-bot'] nobody
59-63010
1 month ago
59-63010
1 month ago
0-79429
22 hours
21474 erdOne
author:erdOne
feat(RingTheory): replace `Ring.DimensionLEOne` with `Ring.KrullDimLE` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import merge-conflict 285/170 Mathlib.lean,Mathlib/RingTheory/DedekindDomain/Basic.lean,Mathlib/RingTheory/DedekindDomain/Dvr.lean,Mathlib/RingTheory/DedekindDomain/Ideal.lean,Mathlib/RingTheory/DiscreteValuationRing/TFAE.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/KrullDimension/Basic.lean,Mathlib/RingTheory/KrullDimension/Localization.lean,Mathlib/RingTheory/KrullDimension/Polynomial.lean,Mathlib/RingTheory/KrullDimension/Quotient.lean,Mathlib/RingTheory/LocalRing/ResidueField/Basic.lean,Mathlib/RingTheory/Nilpotent/End.lean,Mathlib/RingTheory/Nilpotent/Lemmas.lean,Mathlib/RingTheory/PID/Quotient.lean,Mathlib/RingTheory/PrincipalIdealDomain.lean,Mathlib/RingTheory/Spectrum/Maximal/Localization.lean 16 1 ['github-actions'] nobody
59-63002
1 month ago
59-63002
1 month ago
2-7106
2 days
12292 AntoineChambert-Loir
author:AntoineChambert-Loir
feat(Mathlib.RingTheory.TensorProduct.MonoidAlgebra) : tensor product of a monoid algebra * `MonoidAlgebra.rTensorAlgEquiv`: the tensor product of `MonoidAlgebra M α` with `N` is `R`-linearly equivalent to `MonoidAlgebra (M ⊗[R] N) α` * `MonoidAlgebra.scalarRTensorAlgEquiv`, the tensor product of `MonoidAlgebra R α` with `N` is `R`-linearly equivalent to `MonoidAlgebra N α` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict WIP 447/0 Mathlib.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/RingTheory/TensorProduct/MonoidAlgebra.lean 3 23 ['AntoineChambert-Loir', 'eric-wieser', 'github-actions'] nobody
59-62979
1 month ago
59-62979
1 month ago
6-28213
6 days
11575 ScottCarnahan
author:ScottCarnahan
feat (RingTheory/HahnSeries/Addition): Lemmas on leading terms The main result of this PR is that when the exponent set is linearly ordered, then removing the leading term in a Hahn series `x` yields a Hahn series `y` that is, if nonzero, of strictly higher order. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict WIP 39/0 Mathlib/RingTheory/HahnSeries/Addition.lean 1 0 [] nobody
59-62972
1 month ago
59-62972
1 month ago
10-75677
10 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 --- - [ ] depends on:#18728 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 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
59-62965
1 month ago
59-62965
1 month ago
172-57747
172 days
9339 FMLJohn
author:FMLJohn
feat (RingTheory/GradedAlgebra/HomogeneousIdeal): given a finitely generated homogeneous ideal of a graded semiring, construct a finite spanning set for the ideal which only contains homogeneous elements --- - [ ] depends on: #8187 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 402/4 Mathlib.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Module/GradeZeroModule.lean,Mathlib/RingTheory/Finiteness.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousIdeal.lean,Mathlib/RingTheory/GradedAlgebra/Noetherian.lean 8 11 ['FMLJohn', 'github-actions', 'jjaassoonn', 'leanprover-community-mathlib4-bot'] nobody
59-62958
1 month ago
59-62958
1 month ago
0-0
0 seconds
8195 newell
author:newell
feat: add a group presentation of the `DihedralGroup n` Add group presentation $\< a, b\ |\ a ^ 2 = 1, b ^ 2 = 1, (a * b) ^ n = 1 \>$ for `DihedralGroup n`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory merge-conflict WIP 206/2 Mathlib/GroupTheory/PresentedGroup.lean,Mathlib/GroupTheory/SpecificGroups/Dihedral.lean 2 6 ['kbuzzard', 'newell'] nobody
59-62801
1 month ago
59-62801
1 month ago
0-0
0 seconds
11212 shuxuezhuyi
author:shuxuezhuyi
feat(GroupTheory/GroupAction): instance `MulAction (β ⧸ H) α` We instance this naturally from `MulAction β α` when `H` is a normal subgroup and acts trivially on `α`. We also instance `IsometricSMul (M ⧸ N) X` in this way. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory large-import merge-conflict awaiting-author 53/1 Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/Topology/MetricSpace/IsometricSMul.lean 2 6 ['YaelDillies', 'github-actions', 'grunweg', 'urkud'] eric-wieser
assignee:eric-wieser
59-62794
1 month ago
59-62794
1 month ago
193-70524
193 days
27886 alreadydone
author:alreadydone
feat(Algebra): (Mv)Polynomial.X is irreducible assuming NoZeroDivisors --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author
label:t-algebra$
178/66 Archive/Examples/Eisenstein.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Domain.lean,Mathlib/Algebra/Polynomial/Degree/Units.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/Polynomial/RingDivision.lean,Mathlib/Combinatorics/Nullstellensatz.lean,Mathlib/RingTheory/MvPolynomial/Groebner.lean,Mathlib/RingTheory/MvPolynomial/MonomialOrder.lean,Mathlib/RingTheory/MvPolynomial/MonomialOrder/DegLex.lean,Mathlib/RingTheory/Polynomial/Content.lean,Mathlib/RingTheory/Polynomial/Eisenstein/Criterion.lean 13 3 ['alreadydone', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
59-60529
1 month ago
59-60530
1 month ago
1-36700
1 day
26200 adomani
author:adomani
fix: add label when landrun fails Adds the `permission-denied` label on PRs that get blocked by landrun. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI merge-conflict 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
59-11996
1 month ago
59-11996
1 month ago
46-52210
46 days
17469 joelriou
author:joelriou
feat(Algebra/ModuleCat/Differentials/Presheaf): the presheaf of relative differentials Given a functor `F : C ⥤ D`, presheaves of commutative rings `S`, `R` and a morphism `φ : S ⟶ F.op ⋙ R`, we show that derivations relative to `φ` are representable by a presheaf of `R`-modules. This is obtained by reducing to the case of absolute differentials. The construction shall allow to deduce the presheaf version of the cokernel sequence $$f^\star \Omega_{Y/S} ⟶ \Omega_{X/S} ⟶ \Omega_{X/Y} ⟶ 0$$ when `f : X ⟶ Y` and `g : Y ⟶ S` are morphisms of schemes. --- - [x] depends on: #17366 - [x] depends on: #19507 - [x] depends on: #17388 - [x] depends on: #16755 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebraic-geometry t-category-theory merge-conflict WIP 391/10 Mathlib/Algebra/Category/ModuleCat/Differentials/Presheaf.lean 1 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
59-7345
1 month ago
59-7346
1 month ago
0-530
8 minutes
18254 callesonne
author:callesonne
feat(Bicategory/Modification/Pseudo): define modifications between strong natural transformations of pseudofunctors This PR adds modifications between strong natural transformations of pseudofunctors. At the same time, it improves the existing code on modifications between oplax natural tranformations of oplax functors (by removing some simp lemmas). --- - [x] depends on: #18250 - [x] depends on: #18252 - [x] depends on: #18253 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict awaiting-author 335/55 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Modification/Oplax.lean,Mathlib/CategoryTheory/Bicategory/Modification/Pseudo.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Oplax.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Pseudo.lean 5 26 ['callesonne', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'robin-carlier', 'yuma-mizuno'] nobody
59-7344
1 month ago
59-7345
1 month ago
36-5602
36 days
24620 mattrobball
author:mattrobball
chore(CategoryTheory.Basic): change `aesop_cat`'s intro transparency level to `instances` from `default` Let's see if this helps much. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict 93/88 Mathlib/Algebra/Homology/HomologicalComplex.lean,Mathlib/Algebra/Homology/Homotopy.lean,Mathlib/Algebra/Homology/ShortComplex/Preadditive.lean,Mathlib/Algebra/Homology/Single.lean,Mathlib/CategoryTheory/Abelian/GrothendieckCategory/ModuleEmbedding/GabrielPopescu.lean,Mathlib/CategoryTheory/Adjunction/Comma.lean,Mathlib/CategoryTheory/Adjunction/Mates.lean,Mathlib/CategoryTheory/Bicategory/LocallyDiscrete.lean,Mathlib/CategoryTheory/Category/Basic.lean,Mathlib/CategoryTheory/Category/GaloisConnection.lean,Mathlib/CategoryTheory/CodiscreteCategory.lean,Mathlib/CategoryTheory/CommSq.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Discrete/Basic.lean,Mathlib/CategoryTheory/EssentiallySmall.lean,Mathlib/CategoryTheory/FintypeCat.lean,Mathlib/CategoryTheory/Functor/EpiMono.lean,Mathlib/CategoryTheory/Functor/FullyFaithful.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/HomCongr.lean,Mathlib/CategoryTheory/Iso.lean,Mathlib/CategoryTheory/LiftingProperties/Adjunction.lean,Mathlib/CategoryTheory/Limits/ConeCategory.lean,Mathlib/CategoryTheory/Limits/HasLimits.lean,Mathlib/CategoryTheory/Limits/IsLimit.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Terminal.lean,Mathlib/CategoryTheory/Limits/Shapes/ZeroMorphisms.lean,Mathlib/CategoryTheory/MorphismProperty/OverAdjunction.lean,Mathlib/CategoryTheory/Preadditive/Opposite.lean,Mathlib/CategoryTheory/SingleObj.lean,Mathlib/Topology/Sheaves/Sheaf.lean 31 8 ['github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot', 'mattrobball'] nobody
58-84549
1 month ago
58-84549
1 month ago
0-0
0 seconds
25288 robertmaxton42
author:robertmaxton42
feat(CategoryTheory): generalize `Discrete` to arbitrary morphism levels Using an unused `let`, add an 'anchor' to the definition of `Discrete`, allowing it to carry a second universe level that is then used to permit discrete categories to live in any `Cat.{v, u}`. (This trick was borrowed from the code of `ULiftHom`.) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict 38/32 Mathlib/CategoryTheory/Bicategory/LocallyDiscrete.lean,Mathlib/CategoryTheory/Discrete/Basic.lean,Mathlib/CategoryTheory/IsConnected.lean 3 3 ['github-actions', 'joelriou', 'mathlib4-merge-conflict-bot'] nobody
58-83104
1 month ago
58-83105
1 month ago
0-0
0 seconds
27709 kckennylau
author:kckennylau
chore: fix links --- See https://github.com/leanprover-community/mathlib4/pull/27545#discussion_r2238206933 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 269/256 Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/GCDMonoid/Multiset.lean,Mathlib/Algebra/Group/Even.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/Module/Hom.lean,Mathlib/Algebra/Module/Submodule/Bilinear.lean,Mathlib/Algebra/Order/Field/Pi.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Basic.lean,Mathlib/Algebra/Order/Hom/Basic.lean,Mathlib/Algebra/Order/Monovary.lean,Mathlib/Algebra/Order/Ring/Unbundled/Basic.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Ring/Basic.lean,Mathlib/Algebra/Squarefree/Basic.lean,Mathlib/Algebra/Star/BigOperators.lean,Mathlib/Algebra/Star/Free.lean,Mathlib/Algebra/Star/SelfAdjoint.lean,Mathlib/Analysis/Analytic/RadiusLiminf.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/Calculus/Conformal/NormedSpace.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/Deriv/Inverse.lean,Mathlib/Analysis/Calculus/Deriv/Linear.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Complex/Circle.lean,Mathlib/Analysis/Complex/OperatorNorm.lean,Mathlib/Analysis/Convex/Function.lean,Mathlib/Analysis/Convex/Jensen.lean,Mathlib/Analysis/Meromorphic/IsolatedZeros.lean,Mathlib/Analysis/Normed/Operator/BoundedLinearMaps.lean,Mathlib/Analysis/SpecialFunctions/Exponential.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Bounds.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/EulerSineProd.lean,Mathlib/CategoryTheory/Abelian/Opposite.lean,Mathlib/CategoryTheory/Adjunction/Opposites.lean,Mathlib/CategoryTheory/Bicategory/Functor/Pseudofunctor.lean,Mathlib/CategoryTheory/Closed/Monoidal.lean,Mathlib/CategoryTheory/Limits/Shapes/Kernels.lean,Mathlib/CategoryTheory/Localization/Equivalence.lean,Mathlib/CategoryTheory/Localization/Trifunctor.lean,Mathlib/CategoryTheory/ObjectProperty/Basic.lean,Mathlib/CategoryTheory/Sites/Coherent/SheafComparison.lean,Mathlib/Combinatorics/Colex.lean,Mathlib/Combinatorics/Hall/Finite.lean,Mathlib/Combinatorics/Pigeonhole.lean,Mathlib/Combinatorics/Quiver/Covering.lean,Mathlib/Combinatorics/Quiver/Path.lean,Mathlib/Control/LawfulFix.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/Fin/Pigeonhole.lean,Mathlib/Data/FinEnum/Option.lean,Mathlib/Data/Finset/Filter.lean,Mathlib/Data/Finsupp/Fin.lean,Mathlib/Data/Fintype/BigOperators.lean,Mathlib/Data/Fintype/Defs.lean,Mathlib/Data/Int/Basic.lean,Mathlib/Data/Int/Cast/Basic.lean,Mathlib/Data/Int/Cast/Lemmas.lean,Mathlib/Data/Int/Lemmas.lean,Mathlib/Data/Int/Order/Lemmas.lean,Mathlib/Data/Int/Range.lean,Mathlib/Data/List/Chain.lean,Mathlib/Data/List/Dedup.lean,Mathlib/Data/List/Destutter.lean,Mathlib/Data/List/Forall2.lean,Mathlib/Data/List/Lattice.lean,Mathlib/Data/List/Lemmas.lean,Mathlib/Data/List/Nodup.lean,Mathlib/Data/List/Pairwise.lean,Mathlib/Data/List/Permutation.lean,Mathlib/Data/List/ProdSigma.lean,Mathlib/Data/List/Sections.lean,Mathlib/Data/List/Sublists.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matroid/Minor/Restrict.lean,Mathlib/Data/Multiset/FinsetOps.lean,Mathlib/Data/Nat/Basic.lean,Mathlib/Data/Nat/Cast/WithTop.lean,Mathlib/Data/Nat/Choose/Basic.lean,Mathlib/Data/Nat/Factorization/Basic.lean,Mathlib/Data/Nat/Factorization/LCM.lean,Mathlib/Data/PSigma/Order.lean,Mathlib/Data/Prod/Lex.lean,Mathlib/Data/Rat/Encodable.lean,Mathlib/Data/Set/Card.lean,Mathlib/Data/Set/Defs.lean,Mathlib/Data/Set/Finite/Basic.lean,Mathlib/Data/Set/Finite/Lattice.lean,Mathlib/Data/Set/Functor.lean,Mathlib/Data/Set/Notation.lean,Mathlib/Data/Set/Pairwise/Basic.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Data/Sigma/Lex.lean 157 87 ['github-actions', 'kbuzzard', 'kckennylau', 'mathlib4-merge-conflict-bot'] nobody
58-81315
1 month ago
58-81315
1 month ago
0-9
9 seconds
10345 newell
author:newell
feat(Algebra.Module.Zlattice): Add Voronoi Domain Adds the definition for a Voronoi Domain in regards to the $\mathbb{Z}$-lattice: $$C := \lbrace\mathbf{w} \in \mathbb{V}^n\ :\ |\mathbf{w}| \leq |\mathbf{w} - \mathbf{v}|\ \text{for all}\ \mathbf{v} \in \mathbf{L} \rbrace$$ where $\mathbf{L}\$ is the $\mathbb{Z}$-lattice. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict WIP
label:t-algebra$
17/0 Mathlib/Algebra/Module/Zlattice.lean 1 3 ['alreadydone', 'newell'] nobody
58-12803
1 month ago
58-12803
1 month ago
0-0
0 seconds
27286 edegeltje
author:edegeltje
refactor(OrderDual): make a one-field structure and remove defeq abuse --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict WIP 683/426 Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Order/Group/Action/Synonym.lean,Mathlib/Algebra/Order/Group/Synonym.lean,Mathlib/Algebra/Order/GroupWithZero/Action/Synonym.lean,Mathlib/Algebra/Order/GroupWithZero/Synonym.lean,Mathlib/Algebra/Order/Module/Synonym.lean,Mathlib/Algebra/Order/Monoid/Unbundled/OrderDual.lean,Mathlib/Algebra/Order/Ring/Synonym.lean,Mathlib/Data/Nat/Cast/Synonym.lean,Mathlib/Logic/Function/Iterate.lean,Mathlib/Order/Basic.lean,Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/Order/BoundedOrder/Lattice.lean,Mathlib/Order/BoundedOrder/Monotone.lean,Mathlib/Order/Circular.lean,Mathlib/Order/Compare.lean,Mathlib/Order/Disjoint.lean,Mathlib/Order/GaloisConnection/Defs.lean,Mathlib/Order/Iterate.lean,Mathlib/Order/Lattice.lean,Mathlib/Order/Max.lean,Mathlib/Order/MinMax.lean,Mathlib/Order/Monotone/Basic.lean,Mathlib/Order/RelClasses.lean,Mathlib/Order/Synonym.lean,Mathlib/Order/WithBot.lean 26 2 ['alreadydone', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
58-12525
1 month ago
58-12526
1 month ago
0-0
0 seconds
27378 peakpoint
author:peakpoint
refactor(Geometry/Euclidean/Projection): redefine projection and reflection for affine subspaces This PR continues the work from #25578. Original PR: https://github.com/leanprover-community/mathlib4/pull/25578 new-contributor t-euclidean-geometry merge-conflict 316/317 Mathlib/Analysis/Normed/Affine/ContinuousAffineMap.lean,Mathlib/Analysis/Normed/Affine/Isometry.lean,Mathlib/Geometry/Euclidean/Circumcenter.lean,Mathlib/Geometry/Euclidean/Projection.lean 4 7 ['github-actions', 'jsm28', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot', 'peakpoint'] nobody
56-37206
1 month ago
56-37207
1 month ago
15-31164
15 days
20671 thefundamentaltheor3m
author:thefundamentaltheor3m
feat(Analysis/Asymptotics/SpecificAsymptotics): Proving that 𝛔ₖ(n) = O(nᵏ⁺¹) This PR proves a result about the $\sigma_k(n)$ arithmetic function, namely, that it is $O\left(n^{k+1}\right)$. Main theorem: `theorem sigma_asymptotic (k : ℕ) : (fun n ↦ (σ k n : ℝ)) =O[atTop] (fun n ↦ (n ^ (k + 1) : ℝ))` This result was proved as part of the sphere packing project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-number-theory merge-conflict awaiting-author 29/0 Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean 1 3 ['b-mehta', 'github-actions', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
54-66605
1 month ago
54-66605
1 month ago
9-59130
9 days
20267 joelriou
author:joelriou
feat(CategoryTheory): comma categories are accessible --- (I shall probably not work on this PR in the near future.) - [ ] depends on: #19937 - [ ] depends on: #19945 - [ ] depends on: #19959 - [ ] depends on: #20005 - [ ] depends on: #19955 - [x] depends on: #20263 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict awaiting-author WIP 1513/7 Mathlib.lean,Mathlib/CategoryTheory/Comma/Arrow.lean,Mathlib/CategoryTheory/Comma/CardinalArrow.lean,Mathlib/CategoryTheory/EssentiallySmall.lean,Mathlib/CategoryTheory/Limits/Comma.lean,Mathlib/CategoryTheory/Limits/TypesFiltered.lean,Mathlib/CategoryTheory/Presentable/Basic.lean,Mathlib/CategoryTheory/Presentable/CardinalFilteredPresentation.lean,Mathlib/CategoryTheory/Presentable/Comma.lean,Mathlib/CategoryTheory/Presentable/IsCardinalFiltered.lean,Mathlib/CategoryTheory/Presentable/Limits.lean,Mathlib/CategoryTheory/Presentable/LocallyPresentable.lean,Mathlib/CategoryTheory/Presentable/ParallelMaps.lean,Mathlib/SetTheory/Cardinal/HasCardinalLT.lean,docs/references.bib 15 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
54-59572
1 month ago
54-59573
1 month ago
0-0
0 seconds
27451 kckennylau
author:kckennylau
feat(RingTheory/Valuation): define ball, closed ball, and sphere *From the 2025 Local Class Field Theory Workshop.* --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 27/0 Mathlib/RingTheory/Valuation/Basic.lean 1 13 ['JovanGerb', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'pechersky', 'wwylele'] nobody
53-44499
1 month ago
53-44500
1 month ago
17-52359
17 days
27987 kckennylau
author:kckennylau
feat(RingTheory/Valuation): define ball, closed ball, and sphere --- The pullback PR of #26827 and #27451. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import merge-conflict 73/0 Mathlib/RingTheory/Valuation/Basic.lean 1 4 ['JovanGerb', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] nobody
53-44128
1 month ago
53-44129
1 month ago
6-6455
6 days
24862 grunweg
author:grunweg
feat(LocallyIntegrable): generalise more to enorms --- Note: github's diff is very confused; it includes changes which very clearly are already on the master branch. I'll see which of the remaining changes after the dependencies have landed is already polished enough. - [x] depends on: #24352 - [x] depends on: #27457 (this half is settled already) - [ ] open question: filter lemmas; IsBoundedUnder is not the right condition as-is; need to think (or just not generalise) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) carleson t-measure-probability merge-conflict WIP 171/88 Mathlib/MeasureTheory/Function/L1Space/HasFiniteIntegral.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean 3 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
53-37849
1 month ago
53-37850
1 month ago
0-1
1 second
25978 Bergschaf
author:Bergschaf
feat(Order/Sublocale): Open Sublocales --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #25089 t-order merge-conflict 377/8 Mathlib.lean,Mathlib/Order/Hom/Lattice.lean,Mathlib/Order/Nucleus.lean,Mathlib/Order/Sublocale.lean,Mathlib/Order/Synonym.lean,docs/references.bib 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
52-75690
1 month ago
52-75691
1 month ago
0-1908
31 minutes
27197 alreadydone
author:alreadydone
feat(Topology): `IsCoveringMapOn` open set --- - [x] depends on: #25044 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict WIP 282/28 Mathlib/Topology/Covering.lean,Mathlib/Topology/FiberBundle/Trivialization.lean,Mathlib/Topology/Homeomorph/Lemmas.lean,Mathlib/Topology/Maps/Basic.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
52-51399
1 month ago
52-52104
1 month ago
0-0
0 seconds
25133 erdOne
author:erdOne
feat(Tactic/NormNum): support positive characteristic Co-authored-by: Heather Macbeth --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-meta merge-conflict WIP 250/39 Mathlib/Tactic/NormNum/CharP.lean,Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/NormNum/Eq.lean,Mathlib/Tactic/NormNum/Inv.lean,Mathlib/Tactic/NormNum/Test.lean 5 5 ['erdOne', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
51-59288
1 month ago
51-59289
1 month ago
0-0
0 seconds
27003 eric-wieser
author:eric-wieser
chore: use `Simp.ResultQ` more often Also uses `~q` in place of manual `isDefEq` matching. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 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
51-58752
1 month ago
51-58753
1 month ago
32-70098
32 days
26374 joelriou
author:joelriou
feat(CategoryTheory): existence of right derived functors using derivability structures In this PR, we formalize an existence theorem for right derived functors which appeared in the article _Structures de dérivabilité_ by Bruno Kahn and Georges Maltsiniotis, Adv. Math. 218 (2008). --- - [ ] depends on: #26036 This PR continues the work from #22508. Original PR: https://github.com/leanprover-community/mathlib4/pull/22508 t-category-theory merge-conflict WIP 326/2 Mathlib.lean,Mathlib/CategoryTheory/Functor/Derived/PointwiseRightDerived.lean,Mathlib/CategoryTheory/Iso.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Localization/DerivabilityStructure/Basic.lean,Mathlib/CategoryTheory/Localization/DerivabilityStructure/PointwiseRightDerived.lean 6 4 ['github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
51-49586
1 month ago
51-49586
1 month ago
0-53
53 seconds
25483 VTrelat
author:VTrelat
chore(Data/Set/Prod, SetTheory/ZFC/Basic): add theorem prod_subset_of_prod and extend ZFC model Required by @eric-wieser in #24281 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor merge-conflict 103/0 Mathlib/Data/Set/Prod.lean,Mathlib/SetTheory/ZFC/Basic.lean 2 10 ['Ruben-VandeVelde', 'VTrelat', 'github-actions', 'leanprover-community-bot-assistant'] nobody
51-48395
1 month ago
90-82702
2 months ago
29-56208
29 days
16150 urkud
author:urkud
feat(Dynamics): Hopf decomposition Prove Hopf decomposition. - [ ] rewrite to work with the saturations right away, not with a wandering set. - [ ] generalize to an action of a countable group, use fundamental domains. --- - [ ] depends on: #16146 - [ ] depends on: #16126 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-dynamics t-measure-probability merge-conflict 212/0 Mathlib.lean,Mathlib/Dynamics/Ergodic/Dissipative.lean,Mathlib/MeasureTheory/MeasurableSpace/Basic.lean 3 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
51-26724
1 month ago
51-26725
1 month ago
0-0
0 seconds
25401 digama0
author:digama0
feat(Util): SuppressSorry option See also leanprover/lean4#8611 and [#lean4 > Silent sorry @ 💬](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/Silent.20sorry/near/503537964). This is a stop-gap solution while leanprover/lean4#8611 is underway, but it works about as well as any other built in option. Hooking declaration elaborators turns out to be a very powerful technique. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 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
51-13548
1 month ago
51-13548
1 month ago
71-28549
71 days
26394 winstonyin
author:winstonyin
feat: existence of local flows on manifolds This PR continues the work from #21777. Original PR: https://github.com/leanprover-community/mathlib4/pull/21777 Transfer the existence theorem of local flows on vector spaces to manifolds. The precise statement is: > If a vector field `v` on a manifold `M` is continuously differentiable at an interior point `x₀`, then for a given `t₀` there exists a neighbourhood `u` of `x₀`, a positive `ε`, and `γ : M → ℝ → M` such that `γ x` is an integral curve of `v` on `(t₀ - ε, t₀ + ε)` for all `x ∈ u`. This is powerful because all curves `γ x` (each with initial condition `x ∈ u`) share the same existence time interval `(t₀ - ε, t₀ + ε)`, rather than each curve having its own `ε`. This will allow us to show that $C^1$ vector fields on compact manifolds always have global integral curves / global flows. Any suggestions to shorten the proof or split out useful lemmas are welcome! - [x] depends on: #26392 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict WIP 154/52 Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Order/Filter/Prod.lean 3 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'winstonyin'] nobody
51-13109
1 month ago
51-13110
1 month ago
0-70
1 minute
26446 joelriou
author:joelriou
refactor(CategoryTheory): make morphisms in full subcategories a 1-field structure This PR refactors the definition of morphisms in full subcategories (and induced categories), by making them a 1-field structure. This prevents certain defeq abuse, and improves automation. (The only issue is that this adds an extra layer: `f` sometimes becomes `f.hom`, etc.) --- (This time, I will try to complete this refactor. I very much need this for application to homotopical algebra, where full subcategories of cofibrant/fibrant/bifibrant are used.) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict WIP 1741/1418 Mathlib/Algebra/Category/CommAlgCat/FiniteType.lean,Mathlib/Algebra/Category/FGModuleCat/Basic.lean,Mathlib/Algebra/Category/FGModuleCat/EssentiallySmall.lean,Mathlib/Algebra/Category/Grp/FiniteGrp.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/ModuleCat/Tannaka.lean,Mathlib/Algebra/Homology/LocalCohomology.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/Cover/Open.lean,Mathlib/AlgebraicGeometry/FunctionField.lean,Mathlib/AlgebraicGeometry/GammaSpecAdjunction.lean,Mathlib/AlgebraicGeometry/Gluing.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiSeparated.lean,Mathlib/AlgebraicGeometry/Morphisms/Separated.lean,Mathlib/AlgebraicGeometry/Noetherian.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean,Mathlib/AlgebraicGeometry/Scheme.lean,Mathlib/AlgebraicGeometry/Spec.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/AlgebraicTopology/SimplexCategory/MorphismProperty.lean,Mathlib/AlgebraicTopology/SimplicialNerve.lean,Mathlib/AlgebraicTopology/SimplicialSet/Coskeletal.lean,Mathlib/AlgebraicTopology/SimplicialSet/HomotopyCat.lean,Mathlib/AlgebraicTopology/SimplicialSet/NerveAdjunction.lean,Mathlib/AlgebraicTopology/SimplicialSet/Path.lean,Mathlib/CategoryTheory/Abelian/GrothendieckCategory/ColimCoyoneda.lean,Mathlib/CategoryTheory/Abelian/GrothendieckCategory/EnoughInjectives.lean,Mathlib/CategoryTheory/Abelian/GrothendieckCategory/Subobject.lean,Mathlib/CategoryTheory/Action/Concrete.lean,Mathlib/CategoryTheory/Action/Continuous.lean,Mathlib/CategoryTheory/Adjunction/PartialAdjoint.lean,Mathlib/CategoryTheory/Category/TwoP.lean,Mathlib/CategoryTheory/ConcreteCategory/Basic.lean,Mathlib/CategoryTheory/ConnectedComponents.lean,Mathlib/CategoryTheory/Countable.lean,Mathlib/CategoryTheory/Endomorphism.lean,Mathlib/CategoryTheory/EqToHom.lean,Mathlib/CategoryTheory/EssentialImage.lean,Mathlib/CategoryTheory/EssentiallySmall.lean,Mathlib/CategoryTheory/Filtered/Small.lean,Mathlib/CategoryTheory/FinCategory/AsType.lean,Mathlib/CategoryTheory/FintypeCat.lean,Mathlib/CategoryTheory/Galois/Basic.lean,Mathlib/CategoryTheory/Galois/Decomposition.lean,Mathlib/CategoryTheory/Galois/Equivalence.lean,Mathlib/CategoryTheory/Galois/EssSurj.lean,Mathlib/CategoryTheory/Galois/Examples.lean,Mathlib/CategoryTheory/Galois/GaloisObjects.lean,Mathlib/CategoryTheory/Galois/IsFundamentalgroup.lean,Mathlib/CategoryTheory/Galois/Prorepresentability.lean,Mathlib/CategoryTheory/Galois/Topology.lean,Mathlib/CategoryTheory/InducedCategory.lean,Mathlib/CategoryTheory/Limits/ExactFunctor.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Limits/Indization/LocallySmall.lean,Mathlib/CategoryTheory/Linear/Basic.lean,Mathlib/CategoryTheory/Localization/Construction.lean,Mathlib/CategoryTheory/Localization/LocallySmall.lean,Mathlib/CategoryTheory/Localization/Predicate.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Basic.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Grp_.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/CommGrp_.lean,Mathlib/CategoryTheory/Monoidal/CommMon_.lean,Mathlib/CategoryTheory/Monoidal/Grp_.lean,Mathlib/CategoryTheory/Monoidal/Internal/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/Internal/Types/Basic.lean,Mathlib/CategoryTheory/Monoidal/Internal/Types/CommGrp_.lean,Mathlib/CategoryTheory/Monoidal/Internal/Types/Grp_.lean,Mathlib/CategoryTheory/Monoidal/Subcategory.lean,Mathlib/CategoryTheory/MorphismProperty/IsInvertedBy.lean,Mathlib/CategoryTheory/ObjectProperty/FullSubcategory.lean,Mathlib/CategoryTheory/Preadditive/AdditiveFunctor.lean,Mathlib/CategoryTheory/Preadditive/Basic.lean,Mathlib/CategoryTheory/Preadditive/CommGrp_.lean,Mathlib/CategoryTheory/Simple.lean,Mathlib/CategoryTheory/Sites/Coherent/RegularSheaves.lean,Mathlib/CategoryTheory/Sites/EffectiveEpimorphic.lean,Mathlib/CategoryTheory/Sites/Sheaf.lean,Mathlib/CategoryTheory/Sites/SheafHom.lean,Mathlib/CategoryTheory/Sites/SheafOfTypes.lean,Mathlib/CategoryTheory/Skeletal.lean,Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/CategoryTheory/Subobject/Comma.lean,Mathlib/CategoryTheory/Subobject/FactorThru.lean,Mathlib/CategoryTheory/Subobject/Lattice.lean,Mathlib/CategoryTheory/Subobject/MonoOver.lean,Mathlib/CategoryTheory/Subobject/NoetherianObject.lean,Mathlib/CategoryTheory/Subobject/Types.lean,Mathlib/CategoryTheory/Subpresheaf/Subobject.lean,Mathlib/CategoryTheory/Subterminal.lean,Mathlib/CategoryTheory/Topos/Classifier.lean,Mathlib/Condensed/Discrete/Colimit.lean,Mathlib/Condensed/Discrete/LocallyConstant.lean,Mathlib/Condensed/Discrete/Module.lean,Mathlib/Condensed/Light/TopCatAdjunction.lean,Mathlib/Condensed/TopCatAdjunction.lean,Mathlib/Condensed/TopComparison.lean 141 7 ['erdOne', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'smorel394'] nobody
50-77493
1 month ago
70-4115
2 months ago
0-2
2 seconds
28298 thorimur
author:thorimur
chore: dedent `to_additive` docstrings This PR uses automation to dedent `to_additive` docstrings throughout Mathlib. It does not lint against indentation or in any way enforce indentation standards for future docstrings. The convention was chosen in accordance with the discussion and polls at [this Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Poll.3A.20Indentation.20style.20for.20.60to_additive.60.20docstrings/with/534285603). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip merge-conflict documentation 949/949 Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Defs.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/Category/Grp/Basic.lean,Mathlib/Algebra/Category/Grp/FilteredColimits.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/Grp/Ulift.lean,Mathlib/Algebra/Category/MonCat/Basic.lean,Mathlib/Algebra/Category/MonCat/FilteredColimits.lean,Mathlib/Algebra/Category/MonCat/Limits.lean,Mathlib/Algebra/Category/Semigrp/Basic.lean,Mathlib/Algebra/Free.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/Pi.lean,Mathlib/Algebra/Group/Action/Pointwise/Finset.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Embedding.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Algebra/Group/Equiv/Opposite.lean,Mathlib/Algebra/Group/Even.lean,Mathlib/Algebra/Group/Hom/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Hom/Instances.lean,Mathlib/Algebra/Group/Indicator.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/Group/Pi/Units.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Group/Subgroup/Lattice.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Group/Subgroup/Pointwise.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Group/Submonoid/BigOperators.lean,Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Submonoid/MulAction.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/Subsemigroup/Basic.lean,Mathlib/Algebra/Group/Subsemigroup/Operations.lean,Mathlib/Algebra/Group/UniqueProds/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Group/Units/Equiv.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/Group/Units/Opposite.lean,Mathlib/Algebra/Notation/Pi/Basic.lean,Mathlib/Algebra/Opposites.lean,Mathlib/Algebra/Order/BigOperators/Group/List.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Basic.lean,Mathlib/Algebra/Order/Group/Cone.lean,Mathlib/Algebra/Order/Group/OrderIso.lean,Mathlib/Algebra/Order/Group/Units.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Submonoid.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Monoid/Units.lean,Mathlib/Algebra/Order/Pi.lean,Mathlib/Algebra/Regular/Defs.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Data/Finset/NoncommProd.lean,Mathlib/Data/Fintype/BigOperators.lean,Mathlib/Data/Set/MulAntidiagonal.lean,Mathlib/Data/Set/SMulAntidiagonal.lean,Mathlib/Data/Vector/Basic.lean,Mathlib/Dynamics/Ergodic/Action/OfMinimal.lean,Mathlib/Dynamics/FixedPoints/Prufer.lean,Mathlib/Geometry/Manifold/Algebra/SmoothFunctions.lean,Mathlib/GroupTheory/Complement.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Coprod/Basic.lean,Mathlib/GroupTheory/Coset/Basic.lean,Mathlib/GroupTheory/Divisible.lean,Mathlib/GroupTheory/EckmannHilton.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/GroupTheory/FreeGroup/Reduce.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/Blocks.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/FixedPoints.lean,Mathlib/GroupTheory/GroupAction/Hom.lean,Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/GroupTheory/GroupAction/Primitive.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean 141 10 ['eric-wieser', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'thorimur'] nobody
50-24806
1 month ago
51-12178
1 month ago
0-61617
17 hours
27953 CoolRmal
author:CoolRmal
feat(ProbabilityTheory): Conditional Jensen's Inequality This PR adds conditional Jensen's inequality. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability merge-conflict 526/14 Mathlib.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Separation.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Basic.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondJensen.lean,Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean 5 3 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
50-22791
1 month ago
50-22792
1 month ago
8-36460
8 days
27759 plp127
author:plp127
chore(FreeAbelianGroup): deprecate multiplication Deprecate multiplication on `FreeAbelianGroup` in favor of using `MonoidAlgebra`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra merge-conflict
label:t-algebra$
176/86 Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/MonoidAlgebra/MapDomain.lean,Mathlib/GroupTheory/FreeAbelianGroup.lean,Mathlib/RingTheory/FreeCommRing.lean,Mathlib/RingTheory/FreeRing.lean 5 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
49-66394
1 month ago
49-66395
1 month ago
14-59974
14 days
8102 miguelmarco
author:miguelmarco
feat(Tactic): add `unify_denoms` and `collect_signs` tactics This PR adds four new tactics: - `unify_denoms` tries to put expressions with several divisions in a form with only one division. In the case of fields, it works similarly to `field_simp`, but if the hypothesis about denominators being nonzero are not present, it assumes them, and leaves them as new goals to prove. In that sense, it is an "unsafe" tactic (but can be useful nevertheless, for example when you can't find which exact hypothesis is missing). It also works with expressions of naturals and Euclidean domains, assuming the corresponding hypothesis about the denominators dividing the numerators. - `unify_denoms!` extends `unify_denoms` to work with (in)equalities, assuming also that the denominators, once in normal form, are positive. - `collect_signs` works similarly with expressions using sums and substractions: it tries to put them in a form of one sum minus other sum. In the case of working with naturals, it assumes that we never substract a bigger number from a smaller one. Both are implemented essentially as a macro that combines several rewriting rules. Some new lemmas with the corresponding rules are added. --- new-contributor t-meta merge-conflict please-adopt modifies-tactic-syntax good first issue 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
49-63863
1 month ago
49-73619
1 month ago
22-16933
22 days
14203 dagurtomas
author:dagurtomas
feat(Algebra/ModuleCat): descent data Co-authored-by: Jack McKoen Co-authored-by: Christian Merten Co-authored-by: Joël Riou Co-authored-by: Adam Topaz --- - [ ] depends on: #24530 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) workshop-AIM-AG-2024 t-algebra t-algebraic-geometry t-category-theory merge-conflict WIP
label:t-algebra$
253/15 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Descent.lean,Mathlib/Algebra/Homology/ShortComplex/ExactFunctor.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/RingTheory/Flat/FaithfullyFlat/Basic.lean,Mathlib/RingTheory/LocalProperties/Basic.lean,Mathlib/RingTheory/RingHom/FaithfullyFlat.lean,Mathlib/RingTheory/RingHom/Finite.lean,Mathlib/RingTheory/RingHom/Flat.lean,Mathlib/RingTheory/RingHom/Integral.lean,Mathlib/RingTheory/RingHom/Locally.lean,Mathlib/RingTheory/RingHom/Surjective.lean,Mathlib/RingTheory/RingHom/Unramified.lean,Mathlib/RingTheory/RingHomProperties.lean 16 4 ['dagurtomas', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
49-36964
1 month ago
49-36966
1 month ago
0-0
0 seconds
21776 alreadydone
author:alreadydone
Invertible modules --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
571/26 Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Module/Submodule/Equiv.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/RingTheory/FractionalIdeal/Operations.lean,Mathlib/RingTheory/PicardGroup.lean 5 3 ['alreadydone', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
48-65943
1 month ago
48-65944
1 month ago
0-0
0 seconds
20722 ctchou
author:ctchou
feat(Counterexamples): the Vitali set is non-measurable --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability merge-conflict please-adopt awaiting-author 258/3 Counterexamples.lean,Counterexamples/VitaliSetNotMeasurable.lean,Mathlib/MeasureTheory/Measure/NullMeasurable.lean,docs/1000.yaml 4 76 ['ctchou', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'vihdzp'] vihdzp
assignee:vihdzp
48-56289
1 month ago
48-71177
1 month ago
0-0
0 seconds
27446 grunweg
author:grunweg
chore: more enorm lemmas Nothing to see yet: this is a big mess! Start unrolling at `eLpNorm_le_eLpNorm_top_mul_eLpNorm_enorm`; that proof could be a good next target. Need a version of `eLpNorm'_const_smul' which applies to NNReal (or ENNReal, I guess): need to generalise a bunch of lemmas for that. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) carleson merge-conflict WIP 107/9 Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean 3 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
48-47803
1 month ago
48-47804
1 month ago
0-172
2 minutes
14583 lecopivo
author:lecopivo
fix: make concrete cycle notation local fix: make c[...] notation for concrete cycles local --- The notation for concrete cycles prevents you using `c[i]` notation for `c : Array _` This currently does not work ``` import Mathlib variable (c : Array Nat) (i : Fin c.size) #check c[i] -- breaks because of notation for concrete cycles ``` This PR just marks it as local to prevent this issue. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 1/1 Mathlib/GroupTheory/Perm/Cycle/Concrete.lean 1 3 ['eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
46-67117
1 month ago
46-67118
1 month ago
0-12793
3 hours
19097 Vierkantor
author:Vierkantor
chore(Algebra.Polynomial): split `Polynomial/Basic.lean` into smaller files This PR splits `Mathlib.Algebra.Polynomial.Basic` into the following files: * `Polynomial/Defs.lean`: definition and ring structure on `R[X]` * `Polynomial/Module.lean`: module structure on `R[X]` * `Polynomial/Monomial.lean`: merged definition of `monomial`, `X`, `C` into the existing file (this is probably the file you want to import from now on) * `Polynomial/EraseUpdate.lean`: definition of `erase` and `update` * `Polynomial/Sum.lean`: definition of `sum` Initially I added the monomial results to a new file, but ended up merging it with `Monomial.lean` since the two of them merge cleanly. --- - [x] depends on: #28030 (going to resurrect this PR on top of that one later) - [x] depends on: #19095 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
3109/2500 Mathlib.lean,Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MonoidAlgebra/Division.lean,Mathlib/Algebra/MonoidAlgebra/Lift.lean,Mathlib/Algebra/MonoidAlgebra/MapDomain.lean,Mathlib/Algebra/MonoidAlgebra/Module.lean,Mathlib/Algebra/MonoidAlgebra/Opposite.lean,Mathlib/Algebra/MonoidAlgebra/Support.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Cardinal.lean,Mathlib/Algebra/Polynomial/Coeff.lean,Mathlib/Algebra/Polynomial/Defs.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Degree/TrailingDegree.lean,Mathlib/Algebra/Polynomial/EraseUpdate.lean,Mathlib/Algebra/Polynomial/Eval/Defs.lean,Mathlib/Algebra/Polynomial/Eval/Degree.lean,Mathlib/Algebra/Polynomial/Module.lean,Mathlib/Algebra/Polynomial/Monomial.lean,Mathlib/Algebra/Polynomial/Sum.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Finsupp/Ext.lean,Mathlib/Data/Finsupp/Fintype.lean,Mathlib/Data/Finsupp/Indicator.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Finsupp/Pointwise.lean,Mathlib/Data/Finsupp/SMulWithZero.lean,Mathlib/Data/Finsupp/Single.lean,Mathlib/Data/List/ToFinsupp.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Eigs.lean,Mathlib/RingTheory/KrullDimension/Basic.lean,Mathlib/RingTheory/Polynomial/Opposites.lean,Mathlib/RingTheory/PowerSeries/Basic.lean,Mathlib/Tactic/ExtractGoal.lean,MathlibTest/Polynomial.lean,MathlibTest/instance_diamonds.lean,scripts/noshake.json 40 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
45-56549
1 month ago
51-49334
1 month ago
0-0
0 seconds
28054 EtienneC30
author:EtienneC30
feat: an abbreviation for sesquilinear forms Define `SesquilinForm R M := M →ₗ⋆[R] M →ₗ[R] R`. Prove that a `SesquilinForm R M` is symmetric if and only if the corresponding matrix is Hermitian. --- - [ ] depends on: #27873 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
181/39 Counterexamples/QuadraticForm.lean,Mathlib.lean,Mathlib/Algebra/Lie/TraceForm.lean,Mathlib/LinearAlgebra/BilinearForm/Properties.lean,Mathlib/LinearAlgebra/BilinearForm/TensorProduct.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/QuadraticForm/Dual.lean,Mathlib/LinearAlgebra/RootSystem/Finite/CanonicalBilinear.lean,Mathlib/LinearAlgebra/RootSystem/OfBilinear.lean,Mathlib/LinearAlgebra/RootSystem/RootPositive.lean,Mathlib/LinearAlgebra/SesquilinearForm.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean 12 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
45-53877
1 month ago
45-53878
1 month ago
0-0
0 seconds
28622 alreadydone
author:alreadydone
chore(Mathlib): replace `=>` by `↦` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 51792/51792 Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Hom/Rat.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Opposite.lean,Mathlib/Algebra/Algebra/Prod.lean,Mathlib/Algebra/Algebra/Rat.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Spectrum/Pi.lean,Mathlib/Algebra/Algebra/Spectrum/Quasispectrum.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Centralizer.lean,Mathlib/Algebra/Algebra/Subalgebra/Directed.lean,Mathlib/Algebra/Algebra/Subalgebra/IsSimpleOrder.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/Subalgebra/Matrix.lean,Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/Algebra/Subalgebra/Prod.lean,Mathlib/Algebra/Algebra/Subalgebra/Unitization.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Algebra/TransferInstance.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/AlgebraicCard.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Expect.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/BigOperators/Finsupp/Fin.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/Group/Finset/Sigma.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Defs.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Defs.lean,Mathlib/Algebra/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Algebra/BigOperators/Ring/Multiset.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/AlgCat/Monoidal.lean,Mathlib/Algebra/Category/BialgCat/Basic.lean,Mathlib/Algebra/Category/BoolRing.lean,Mathlib/Algebra/Category/CoalgCat/Basic.lean,Mathlib/Algebra/Category/CoalgCat/ComonEquivalence.lean,Mathlib/Algebra/Category/FGModuleCat/Limits.lean,Mathlib/Algebra/Category/Grp/AB.lean,Mathlib/Algebra/Category/Grp/Adjunctions.lean,Mathlib/Algebra/Category/Grp/Basic.lean,Mathlib/Algebra/Category/Grp/Biproducts.lean,Mathlib/Algebra/Category/Grp/CartesianMonoidal.lean,Mathlib/Algebra/Category/Grp/Colimits.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/Category/Grp/FilteredColimits.lean,Mathlib/Algebra/Category/Grp/Images.lean,Mathlib/Algebra/Category/Grp/Kernels.lean,Mathlib/Algebra/Category/Grp/LargeColimits.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Category/Grp/ZModuleEquivalence.lean,Mathlib/Algebra/Category/Grp/Zero.lean,Mathlib/Algebra/Category/GrpWithZero.lean,Mathlib/Algebra/Category/HopfAlgCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Biproducts.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/FilteredColimits.lean,Mathlib/Algebra/Category/ModuleCat/Images.lean,Mathlib/Algebra/Category/ModuleCat/Injective.lean,Mathlib/Algebra/Category/ModuleCat/Kernels.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Closed.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Symmetric.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pushforward.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafify.lean,Mathlib/Algebra/Category/ModuleCat/Products.lean 3838 4 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
45-17028
1 month ago
45-17029
1 month ago
0-83357
23 hours
24793 tristan-f-r
author:tristan-f-r
feat: trace of unitarily similar matrices adds a theorem relating trace to unitarily similar matrices used in the easy direction of specht's theorem --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author
label:t-algebra$
7/0 Mathlib/LinearAlgebra/UnitaryGroup.lean 1 4 ['github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot', 'tristan-f-r'] nobody
45-12667
1 month ago
45-12668
1 month ago
1-55872
1 day
28532 alreadydone
author:alreadydone
chore(Algebra/Ring/Defs): add two classes and extend more Add the missing `NonAssocComm(Semi)ring` and modify existing classes to `extends` more to remove some manual instances. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
89/70 Mathlib/Algebra/Colimit/DirectLimit.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Analysis/Normed/Unbundled/SpectralNorm.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Basic.lean,Mathlib/NumberTheory/SelbergSieve.lean,Mathlib/RingTheory/Localization/Integral.lean,Mathlib/RingTheory/PowerSeries/GaussNorm.lean,Mathlib/RingTheory/Valuation/Discrete/Basic.lean,Mathlib/Tactic/Ring/Basic.lean,MathlibTest/TCSynth.lean 10 17 ['alreadydone', 'eric-wieser', 'github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] nobody
44-36891
1 month ago
44-36892
1 month ago
2-77063
2 days
28675 vihdzp
author:vihdzp
chore: deprecate `bsup`, `lsub`, `blsub` This PR formally deprecates `Ordinal.bsup`, `Ordinal.lsub`, and `Ordinal.blsub`. These arose as ways to construct suprema of ordinals, before we realized it was a much better idea to simply work with the `ConditionallyCompleteLinearOrderBot` structure of `Ordinal`. As a consequence, it gets rid of some longstanding non-deprecated material depending on deprecated material. --- - [x] depends on: #28677 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory merge-conflict 315/130 Mathlib/Order/IsNormal.lean,Mathlib/SetTheory/Cardinal/Regular.lean,Mathlib/SetTheory/Game/Birthday.lean,Mathlib/SetTheory/Ordinal/Family.lean,Mathlib/SetTheory/Ordinal/NaturalOps.lean,Mathlib/SetTheory/Ordinal/Topology.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
44-30839
1 month ago
44-44512
1 month ago
0-0
0 seconds
27872 JovanGerb
author:JovanGerb
chore(gcongr): clean up imports This PR removes redundant `gcongr` imports. And when we do import `gcongr`, we now also import the core `@[gcongr]` tags, and also `grw`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict delegated 7/23 Archive/Imo/Imo2019Q4.lean,Mathlib/Algebra/ContinuedFractions/Computation/ApproximationCorollaries.lean,Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/MvPolynomial/SchwartzZippel.lean,Mathlib/Algebra/Order/BigOperators/Expect.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Order/Chebyshev.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Convex/Star.lean,Mathlib/Combinatorics/Additive/PluenneckeRuzsa.lean,Mathlib/Combinatorics/Enumerative/Catalan.lean,Mathlib/Combinatorics/SetFamily/FourFunctions.lean,Mathlib/Combinatorics/SimpleGraph/Density.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/Basic.lean,Mathlib/Data/Nat/Basic.lean,Mathlib/NumberTheory/FLT/Polynomial.lean,Mathlib/NumberTheory/FermatPsp.lean,Mathlib/Order/Basic.lean,Mathlib/Order/Filter/AtTopBot/Archimedean.lean,Mathlib/Tactic/GCongr/CoreAttrs.lean,Mathlib/Topology/EMetricSpace/Paracompact.lean 21 11 ['JovanGerb', 'bryangingechen', 'github-actions', 'grunweg', 'mathlib-bors', 'mathlib4-merge-conflict-bot'] nobody
43-79609
1 month ago
43-79609
1 month ago
4-34325
4 days
28626 alreadydone
author:alreadydone
chore(Archive, Counterexamples): replace => by ↦ --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 288/288 Archive/Arithcc.lean,Archive/Examples/IfNormalization/Result.lean,Archive/Examples/IfNormalization/WithoutAesop.lean,Archive/Examples/PropEncodable.lean,Archive/Imo/Imo1959Q1.lean,Archive/Imo/Imo1960Q1.lean,Archive/Imo/Imo1962Q4.lean,Archive/Imo/Imo1972Q5.lean,Archive/Imo/Imo1977Q6.lean,Archive/Imo/Imo1981Q3.lean,Archive/Imo/Imo1987Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo1998Q2.lean,Archive/Imo/Imo2001Q2.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2006Q5.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q4.lean,Archive/Imo/Imo2011Q3.lean,Archive/Imo/Imo2013Q1.lean,Archive/Imo/Imo2019Q1.lean,Archive/Imo/Imo2024Q5.lean,Archive/MiuLanguage/Basic.lean,Archive/MiuLanguage/DecisionSuf.lean,Archive/OxfordInvariants/Summer2021/Week3P1.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/AbelRuffini.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/AscendingDescendingSequences.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/BirthdayProblem.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Archive/Wiedijk100Theorems/Konigsberg.lean,Archive/Wiedijk100Theorems/Partition.lean,Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Archive/ZagierTwoSquares.lean,Counterexamples/AharoniKorman.lean,Counterexamples/CanonicallyOrderedCommSemiringTwoMul.lean,Counterexamples/CharPZeroNeCharZero.lean,Counterexamples/CliffordAlgebraNotInjective.lean,Counterexamples/DirectSumIsInternal.lean,Counterexamples/GameMultiplication.lean,Counterexamples/Girard.lean,Counterexamples/HomogeneousPrimeNotPrime.lean,Counterexamples/MapFloor.lean,Counterexamples/MonicNonRegular.lean,Counterexamples/Phillips.lean,Counterexamples/Pseudoelement.lean,Counterexamples/QuadraticForm.lean,Counterexamples/SorgenfreyLine.lean,Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean 54 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
43-46154
1 month ago
43-46155
1 month ago
2-48353
2 days
7300 ah1112
author:ah1112
feat: synthetic geometry This is adding synthetic geometry using Avigad's axioms and formalizing Euclid Book I, through the Pythagorean theorem. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry merge-conflict awaiting-author help-wanted 2661/0 Mathlib.lean,Mathlib/Geometry/Synthetic/Avigad/Axioms.lean,Mathlib/Geometry/Synthetic/Avigad/EuclidBookI.lean,Mathlib/Geometry/Synthetic/Avigad/Tactics.lean 4 74 ['ah1112', 'alreadydone', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'plp127', 'tb65536', 'urkud'] nobody
43-4840
1 month ago
72-39798
2 months ago
0-0
0 seconds
13795 astrainfinita
author:astrainfinita
perf(Algebra/{Group, GroupWithZero, Ring}/InjSurj): reduce everything --- - [ ] depends on: #15192 - [ ] depends on: #15476 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
340/194 Mathlib/Algebra/Equiv/TransferInstance.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/End.lean,Mathlib/Algebra/GroupWithZero/InjSurj.lean,Mathlib/Algebra/Module/Defs.lean,Mathlib/Algebra/Module/RingHom.lean,Mathlib/Algebra/Ring/InjSurj.lean,scripts/noshake.json 9 37 ['MichaelStollBayreuth', 'astrainfinita', 'eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mattrobball'] nobody
42-52225
1 month ago
171-67230
5 months ago
52-31623
52 days
24095 lecopivo
author:lecopivo
feat: `fun_prop` for Is(Bounded)LinearMap + notation `fun x ↦L[R] f x` Sets up `fun_prop` for `IsLinearMap` and `IsBoundedLinearMap` also adds notation `fun x ↦ₗ[R] f x` and `fun x ↦L[R] f x` to write bundled versions like lambda function instead of the currently used pointfree notation. large-import t-algebra merge-conflict
label:t-algebra$
352/22 Mathlib.lean,Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/Module/LinearMap/Pi.lean,Mathlib/Algebra/Module/LinearMap/Prod.lean,Mathlib/Analysis/Normed/Operator/BoundedLinearMaps.lean,scripts/noshake.json 8 24 ['dagurtomas', 'eric-wieser', 'github-actions', 'lecopivo', 'mathlib4-merge-conflict-bot'] dagurtomas
assignee:dagurtomas
42-31226
1 month ago
42-31227
1 month ago
85-19916
85 days
25775 emilyriehl
author:emilyriehl
feat(AlgebraicTopology/SimplicialSet/NerveAdjunction): to Strict Segal 2 Under a suitable hypothesis, a map of 2-truncated simplicial sets can be generated from a refl prefunctor between the underlying reflexive quivers --- provided the codomain is `StrictSegal`. This abstracts a previously formalized result that requires the codomain to be the 2-truncated nerve of a category. Co-authored-by: Aaron Liu --- The current draft displays the old code for comparison with new versions labeled ALT. After initial review this will be cut. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #23848.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/23848* t-algebraic-topology infinity-cosmos t-category-theory merge-conflict awaiting-author 457/206 Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/AlgebraicTopology/SimplicialSet/HomotopyCat.lean,Mathlib/AlgebraicTopology/SimplicialSet/NerveAdjunction.lean,Mathlib/AlgebraicTopology/SimplicialSet/StrictSegal.lean,Mathlib/CategoryTheory/ComposableArrows.lean,Mathlib/CategoryTheory/EqToHom.lean 7 38 ['emilyriehl', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot', 'robin-carlier'] robin-carlier
assignee:robin-carlier
42-23853
1 month ago
42-23854
1 month ago
17-16247
17 days
28095 Equilibris
author:Equilibris
Univ generic corec Draft PR: Adding variable universe corecursor for PFunctor --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict 321/70 Mathlib/Data/PFunctor/Multivariate/Basic.lean,Mathlib/Data/PFunctor/Multivariate/M.lean,Mathlib/Data/TypeVec.lean 3 7 ['Equilibris', 'alexkeizer', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
42-13471
1 month ago
42-13472
1 month ago
0-0
0 seconds
28150 Equilibris
author:Equilibris
chore: clean up proofs typevec proofs While adding variable universe corecs I found a lot of theorems in typevec that could do with a bit of a clean-up --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor merge-conflict 24/26 Mathlib/Data/TypeVec.lean 1 7 ['Equilibris', 'alexkeizer', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
42-13470
1 month ago
42-13471
1 month ago
13-49738
13 days
26478 JovanGerb
author:JovanGerb
chore(LibraryRewrite): replace `rw??` with `rw?` As suggested by @YaelDillies, now `rw?` overwrites Lean core's implementation of `rw?`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 56/49 Mathlib/Tactic/Widget/LibraryRewrite.lean,MathlibTest/LibraryRewrite.lean,MathlibTest/rewrites.lean 3 6 ['YaelDillies', 'erdOne', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] alexjbest
assignee:alexjbest
41-83625
1 month ago
41-83625
1 month ago
41-80687
41 days
27868 grunweg
author:grunweg
linter indentation playground --- Trying out the changes in #27525. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict WIP 413/0 Mathlib/AlgebraicTopology/SimplexCategory/Augmented.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/Basic.lean,Mathlib/CategoryTheory/Sites/Coherent/Basic.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/EReal/Basic.lean,Mathlib/Data/Nat/Prime/Defs.lean,Mathlib/FieldTheory/RatFunc/Basic.lean,Mathlib/Init.lean,Mathlib/ModelTheory/Algebra/Ring/Basic.lean,Mathlib/ModelTheory/Arithmetic/Presburger/Basic.lean,Mathlib/ModelTheory/Basic.lean,Mathlib/ModelTheory/Graph.lean,Mathlib/ModelTheory/Order.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Util/Notation3.lean 15 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
41-83064
1 month ago
41-83065
1 month ago
0-1
1 second
27403 MoritzBeroRoos
author:MoritzBeroRoos
fix: replace probably erroneous usage of ⬝ (with old \cdot) by · (with \centerdot) Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot). Currently the abbreviations \cdot and \centerdot resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for center..). This pr replaces instances of ⬝ where · was probably meant. All of the replacement is in comments, except for the file bench_summary.lean which is used for priting the github benchmark results. Since this file is about scientific notation of numbers, sure · was meant to be used, not a rectangle. [Related](https://github.com/leanprover-community/mathlib4/pull/27399) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict 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
41-79190
1 month ago
64-55112
2 months ago
7-54661
7 days
28042 kckennylau
author:kckennylau
feat(Topology/ValuativeRel): a topological basis indexed by pairs of elements --- The pullback PR of #27314 and #27163. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 140/23 Mathlib/RingTheory/Valuation/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 2 3 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
41-79144
1 month ago
41-79144
1 month ago
7-4998
7 days
26015 linesthatinterlace
author:linesthatinterlace
feat: Add high-level generalizations from `MonoidHom` lifts This PR continues the work from #25296. Original PR: https://github.com/leanprover-community/mathlib4/pull/25296 migrated-from-branch t-algebra merge-conflict
label:t-algebra$
1251/156 Mathlib/Algebra/Category/Ring/FinitePresentation.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Hom/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/Ring/Hom/Basic.lean,Mathlib/Algebra/Ring/Hom/Defs.lean,Mathlib/Data/ZMod/Basic.lean,Mathlib/NumberTheory/DirichletCharacter/Basic.lean,Mathlib/RingTheory/Ideal/Maps.lean 12 3 ['github-actions', 'leanprover-community-bot-assistant', 'linesthatinterlace'] nobody
41-41047
1 month ago
41-41047
1 month ago
17-68720
17 days
27399 MoritzBeroRoos
author:MoritzBeroRoos
chore: replace every usage of ⬝ᵥ (with old \cdot) by ·ᵥ (with \centerdot) Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot). Currently the abbreviations `\cdot` and `\centerdot` resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for `center`..): - `\cdot` gives ⬝ [U+2B1D](https://www.compart.com/en/unicode/U+2B1D) "Black Very Small Square" - `\centerdot` gives · [U+00B7](https://www.compart.com/en/unicode/U+00B7) "Middle Dot" Mathlib mostly uses the `\centerdot` variant, except for the dotProduct notation and some probably unsuspecting people wanting \centerdot but getting \cdot in their comments and 6 uses of a notation using the raw `\cdot` without any subscript at `Mathlib\Topology\Homotopy\Product.lean`. This PR replaces the dot product `⬝ᵥ` with its `\centerdot` counterpart `·ᵥ`. The related PR [here](https://github.com/leanprover/vscode-lean4/pull/639) can then overwrite the `\cdot` abbreviation, to produce the same symbol as the `centerdot` abbreviation does. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict 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
41-41022
1 month ago
64-55113
2 months ago
7-62439
7 days
27835 edegeltje
author:edegeltje
feat(Tactic): ring modulo a given characteristic This PR extends the `ring` tactic with a new config argument `char` which will try to reduce all constant terms modulo the given characteristic. This allows `ring` to prove e.g. `(x + y)^3 = x^3 + y^3` in characteristic 3. This is a simpler and faster way to do so than what we had before: `repeat { ring; reduce_mod_char }` becomes `ring (config := { char := 3 })`. The first step is to split off the required `CharP` definitions, since `Mathlib.Algebra.CharP.Basic` already requires the `ring` tactic. To perform the reduction modulo the given characteristic, I implemented `reduceCast` which reduces a raw integer, and wrapped it in `reduceResult` that takes a `NormNum.Result` for easy use. We need to pass through quite a few parameters into `reduceResult` so maybe it's worth defining a structure, or reusing `Cache` for this. Then it's basically a case of replacing every place where `ring` constructs a numeral with a call to `reduceResult`. Limitations: * `ring` doesn't attempt to detect the characteristic by itself, you need to pass it in explicitly. Trying to infer a `CharP` instance at each point sounds quite expensive. * Since the support for `%` in `NormNum` only exists for integers, I implemented the reduction only when a `Ring` instance is available. It is still sound in the semiring case, just not complete. * We could optimize exponentiation in the specific case where the characteristic `p` is a prime that divides the exponent `n`: `(x + y)^n = x^n + y^n`. I'll leave that to future work. --- This used to be #10765 by Anne Baanen before the great forkening. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) migrated-from-branch large-import t-meta merge-conflict 312/133 Mathlib/LinearAlgebra/Eigenspace/Basic.lean,Mathlib/RingTheory/MvPolynomial/Basic.lean,Mathlib/Tactic/LinearCombination.lean,Mathlib/Tactic/Module.lean,Mathlib/Tactic/Polyrith.lean,Mathlib/Tactic/Ring/Basic.lean,Mathlib/Tactic/Ring/Compare.lean,Mathlib/Tactic/Ring/RingNF.lean,MathlibTest/ring_compare.lean,MathlibTest/ring_mod_char.lean 10 4 ['edegeltje', 'github-actions', 'mathlib4-merge-conflict-bot'] joneugster
assignee:joneugster
40-44858
1 month ago
51-12615
1 month ago
11-83928
11 days
25889 plp127
author:plp127
fix(Tactic/Widget/Conv): fix various issues Fixes various issues with the `conv?` widget. Closes #25162. ([Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/bug.20in.20.60conv.3F.60)) Specifically, fixes issues with `conv?` where - when converting a `SubExpr.Pos` to conv directions, it always uses the goal expression as reference, even when working on a hypothesis, this often leads to bad results and makes it unusable on hypotheses - it refuses to go all the way in to a function (for example in `Nat.succ 0`, you can't access `Nat.succ`) - it refuses to enter binders where the name of the bound variable contains the character `0` (try it on `∀ (x0 : Nat), x0 = x0`) - it panics if it can't find a binder name instead of just coming up with one itself, this also means usually you can't enter either side of a non-dependent arrow since those usually don't have binder names (try it on `False → False`) - you can't enter the type of a binder, you end up going into the body instead (try it on `fun (x : False) => (x.elim : False → Nat) x.elim`) - you can't partially enter a function, you end up going to the top argument after instead (for example, in the expression `id (id id) 0`, when you click on `id (id id)`, you end up going to `id id`) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 419/84 Mathlib/Tactic/Widget/Conv.lean,MathlibTest/conv?.lean 2 5 ['bryangingechen', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127'] bryangingechen and kmill
assignee:kmill assignee:bryangingechen
40-29315
1 month ago
40-29316
1 month ago
70-58775
70 days
23621 astrainfinita
author:astrainfinita
chore: deprecate `LinearOrderedComm{Monoid, Group}WithZero` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #20676 t-order t-algebra merge-conflict
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 n/a ['astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] kbuzzard
assignee:kbuzzard
40-24312
1 month ago
unknown
unknown
28863 yury-harmonic
author:yury-harmonic
ignore: make CI build oleans It looks like CI doesn't build oleans unless I open a PR. Or I can't see this workflow. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict 1123/100 Mathlib.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Finsupp.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Nat/Defs.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/Torsion.lean,Mathlib/Algebra/MvPolynomial/Eval.lean,Mathlib/Algebra/MvPolynomial/Expand.lean,Mathlib/Algebra/Order/Floor/Semiring.lean,Mathlib/Algebra/Order/Group/Basic.lean,Mathlib/Algebra/Order/Positive/Field.lean,Mathlib/Algebra/Order/Positive/Ring.lean,Mathlib/Algebra/Polynomial/Eval/Defs.lean,Mathlib/Algebra/Ring/Periodic.lean,Mathlib/Algebra/Ring/Torsion.lean,Mathlib/AlgebraicTopology/DoldKan/Decomposition.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Data/DFinsupp/NeLocus.lean,Mathlib/Data/Finset/Defs.lean,Mathlib/Data/Finset/Filter.lean,Mathlib/Data/Finset/Option.lean,Mathlib/Data/Finsupp/NeLocus.lean,Mathlib/Data/Multiset/Defs.lean,Mathlib/Data/Multiset/Filter.lean,Mathlib/Data/NNRat/Floor.lean,Mathlib/Data/Nat/Count.lean,Mathlib/Data/Nat/Factorial/Basic.lean,Mathlib/Data/Nat/NthRoot/Defs.lean,Mathlib/Data/Nat/NthRoot/Lemmas.lean,Mathlib/Data/Nat/Totient.lean,Mathlib/Data/PNat/Factors.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Data/Rat/Lemmas.lean,Mathlib/Data/ZMod/ValMinAbs.lean,Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/GroupTheory/OrderOfElement.lean,Mathlib/LinearAlgebra/LinearIndependent/Basic.lean,Mathlib/LinearAlgebra/Matrix/SemiringInverse.lean,Mathlib/Logic/Function/Defs.lean,Mathlib/NumberTheory/ArithmeticFunction.lean,Mathlib/Order/Partition/Finpartition.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Basic.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Expand.lean,Mathlib/Tactic/NormNum/Basic.lean,Mathlib/Tactic/Positivity/Basic.lean,MathlibTest/norm_num_ext.lean,MathlibTest/positivity.lean 49 3 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
39-64145
1 month ago
39-64146
1 month ago
0-0
0 seconds
28933 artie2000
author:artie2000
WIP chore(Data): correct definition for `single_apply` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 101/98 Counterexamples/DirectSumIsInternal.lean,Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/Group/Finsupp.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Analysis/InnerProductSpace/Projection/FiniteDimensional.lean,Mathlib/Combinatorics/Nullstellensatz.lean,Mathlib/Data/DFinsupp/Defs.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/DFinsupp/Sigma.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Finsupp/SMul.lean,Mathlib/Data/Finsupp/Single.lean,Mathlib/Data/Finsupp/ToDFinsupp.lean,Mathlib/LinearAlgebra/Basis/Basic.lean,Mathlib/LinearAlgebra/Basis/Defs.lean,Mathlib/LinearAlgebra/Basis/Prod.lean,Mathlib/LinearAlgebra/DFinsupp.lean,Mathlib/LinearAlgebra/Finsupp/Defs.lean,Mathlib/LinearAlgebra/Finsupp/LinearCombination.lean,Mathlib/LinearAlgebra/Finsupp/Supported.lean,Mathlib/LinearAlgebra/FreeModule/Basic.lean,Mathlib/LinearAlgebra/FreeModule/Finite/CardQuotient.lean,Mathlib/LinearAlgebra/LinearIndependent/Defs.lean,Mathlib/LinearAlgebra/Matrix/ToLin.lean,Mathlib/LinearAlgebra/Multilinear/DFinsupp.lean,Mathlib/LinearAlgebra/StdBasis.lean,Mathlib/RingTheory/MvPolynomial/Groebner.lean 31 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
38-12816
1 month ago
38-12817
1 month ago
0-75271
20 hours
27437 kckennylau
author:kckennylau
feat(RingTheory/Valuation): some lemmas about comparing with 1 and 0 and with each other *From the 2025 Local Class Field Theory Workshop.* --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict WIP 109/22 Mathlib/NumberTheory/Padics/ValuativeRel.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/Extension.lean,Mathlib/RingTheory/Valuation/ValuativeRel.lean 4 20 ['erdOne', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'matthewjasper', 'pechersky'] nobody
37-43603
1 month ago
37-43604
1 month ago
14-30610
14 days
28708 sjh227
author:sjh227
feat (Data) : edit DoublyStochastic, add Stochastic to matrix edit DoublyStochastic add Stochastic --- Add the file Stochastic to matrix. Edit DoublyStochastic so that it depends on Stochastic along with a new lemma t-data new-contributor merge-conflict 249/1 Mathlib.lean,Mathlib/Data/Matrix/DoublyStochastic.lean,Mathlib/Data/Matrix/Stochastic.lean 3 26 ['github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot', 'sjh227'] nobody
37-31734
1 month ago
37-31734
1 month ago
0-78027
21 hours
6042 MohanadAhmed
author:MohanadAhmed
feat(LinearAlgebra/Matrix/SVD): Singular Value Decomposition of R or C Matrices This file provides proves the SVD theorem which decomposes a real/complex matrix into left eigenvectors, singular values block diagonal matrix and right eigenvectors. Any matrix A (M × N) with rank r = A.rank and with elements in ℝ or ℂ fields can be decompsed into the product of three matrices: $$A = USV$$ * The three matrices are defined as - $U$: an M × M matrix containing the left eigenvectors of the matrix - $S$: an M × N matrix with an r × r block in the upper left corner with nonzero singular values - $V$: an N × N matrix containing the right eigenvectors of the matrix Note that * $S$ is a block matrix $S = [S₁₁, S₁₂; S₂₁, S₂₂]$ with - $S₁₁$: a diagonal r × r matrix and - $S₁₂$ : r × (N - r) zero matrix, S₂₁ : (M - r) × r zero matrix and - $S₂₂$: (M - r) × (N - r) zero matrix * $U$ is a block column matrix U = [U₁ U₂] with - $U₁$ : a M × r containing left eigenvectors with nonzero singular values. - $U₂$ : a M × (M - r) containing left eigenvectors with zero singular values. * $V$ is a block column matrix V = [V₁ V₂] with - $V₁$ : a N × r containing right eigenvectors with nonzero singular values. - $V₂$ : a M × (M - r) containing right eigenvectors with zero singular values. Since in mathlib the eigenvalues of hermitian matrices are defined in an "arbitrary" undetermined order, we begin by partition the singular values into zero and non-zero values. We partition the corresponding eigenvectors from AᴴA and AAᴴ using similar rearrangements. These are included in `SVD.svdReindex`. The basic API for Column and Row partitioned matrices is from `ColumnRowPartitioned`. We then proceed to transfer some of the lemmas we need about eigenvector matrices (for example that they are unitary: i.e. inverse is conjugate transpose.). Note that since invertibility in mathlib is defined for square matrices while our matrices are partitioned i.e. N × (N₁ ⊕ N₂) and N ≃ (N ⊕ N₂), Lean cannot apply the Invertible definition. We workaround this were necessary. Lemma `reduced_spectral_theorem` (`reduced_spectral_theorem'`) shows that AᴴA and AAᴴ, can be reduced to products containing only the non-zero singular eigenvectors. This is later used in proving the main SVD theroem. A few lemmas are provided about the invertibility of the non-zero singular values matrix: `svdσ_inv`, `σ_inv_μ_σ_inv_eq_one`, `IsUnit_det_svdσ`, `IsUnit_det_svdσ_mapK` and `svdσ_inv_mapK`. To make relating left eigenvectors to right eigenvectors easier we define U₁ = AV₁σ⁻¹ while U₂ is obtained from the eigenvectors of (AAᴴ). This avoid a lengthy reindexing operation with many proofs. The vectors in U₂ have no such issue since they are multiplied by zero singular values anyway. Co-authored-by: Mohanad Ahmed --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict please-adopt WIP
label:t-algebra$
588/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/SVD/Defs.lean,Mathlib/LinearAlgebra/Matrix/SVD/Reindex.lean 3 115 ['MohanadAhmed', 'Vierkantor', 'alexjbest', 'eric-wieser', 'j-loreaux', 'jcommelin', 'mathlib4-merge-conflict-bot', 'sgouezel'] nobody
37-14743
1 month ago
37-14744
1 month ago
181-72917
181 days
28826 alreadydone
author:alreadydone
feat(Category): add `SemimoduleCat` + introduce Presemiadditive categories, which generalizes Preadditive categories: the Hom sets are commutative monoids rather than groups, and `comp_zero` and `zero_comp` is no longer automatic. The new file Preadditive/Semi.lean is adapted from Preadditive/Basic.lean, though many contents can't be generalized. + generalize Functor.Additive and Functor.Linear to take Presemiadditive categories instead. The former needs a `map_zero` field since it's not automatic for Presemiadditive categories. + introduce SemimoduleCat, the category of semimodules (mathlib's Module) over a Semiring. The new file ModuleCat/Semi.lean is copied from ModuleCat/Basic.lean. TODOs: additive/linear equivalence between SemimoduleCat and ModuleCat and use it to transfer results; monoidal structure on SemimoduleCat; change `CommRing.Pic` to use SemimoduleCat. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-CI merge-conflict 978/123 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/Category/MonCat/Presemiadditive.lean,Mathlib/CategoryTheory/Linear/Basic.lean,Mathlib/CategoryTheory/Preadditive/AdditiveFunctor.lean,Mathlib/CategoryTheory/Preadditive/Basic.lean,Mathlib/CategoryTheory/Preadditive/Biproducts.lean,Mathlib/CategoryTheory/Preadditive/FunctorCategory.lean,Mathlib/CategoryTheory/Preadditive/Semi.lean 9 4 ['alreadydone', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127'] nobody
37-9382
1 month ago
37-23621
1 month ago
0-1
1 second
27785 staroperator
author:staroperator
chore(Algebra/Group/Submonoid): golf `Nat.addSubmonoidClosure_one` using `simp` This should improve the proof readability. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra merge-conflict
label:t-algebra$
8/15 Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Order/Star/Basic.lean 3 9 ['github-actions', 'joneugster', 'leanprover-bot', 'mathlib4-merge-conflict-bot', 'staroperator'] joneugster
assignee:joneugster
36-84485
1 month ago
36-84486
1 month ago
26-34065
26 days
28148 kckennylau
author:kckennylau
feat(Matrix): Simproc and Rw-proc for Matrix Transpose Co-authored by Aaron Liu. ```lean example : !![1, 2, 3; 4, 5, 6]ᵀ = !![1, 4; 2, 5; 3, 6] := by rw [transpose_of% 2 3] example : !![1, 2, 3; 4, 5, 6]ᵀ = !![1, 4; 2, 5; 3, 6] := by rw [transpose_of] example : !![1, 2, 3; 4, 5, 6]ᵀ = !![1, 4; 2, 5; 3, 6] := by simp only [matrix_transpose] ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 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
36-84356
1 month ago
36-84357
1 month ago
16-54453
16 days
20850 vihdzp
author:vihdzp
chore(Logic/Equiv/Basic): extend `sumCompl` API We make a couple of redundant arguments implicit, rename two misnamed theorems, and add two new ones. --- I'm not sure if the theorems I renamed actually had the correct name; if they did, then [`Equiv.Set.sumCompl_symm_apply_of_mem`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Logic/Equiv/Set.html#Equiv.Set.sumCompl_symm_apply_of_mem) and [`Equiv.Set.sumCompl_symm_apply_of_not_mem`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Logic/Equiv/Set.html#Equiv.Set.sumCompl_symm_apply_of_not_mem) should be renamed instead to match. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data t-logic merge-conflict awaiting-author 21/6 Mathlib/Logic/Equiv/Basic.lean,Mathlib/Logic/Equiv/Fintype.lean 2 6 ['eric-wieser', 'github-actions', 'grunweg', 'kbuzzard', 'vihdzp'] nobody
36-84351
1 month ago
197-79158
6 months ago
28-73677
28 days
26510 alreadydone
author:alreadydone
feat(Matroid): exchange lemmas involving closure --- for #24350 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data t-combinatorics merge-conflict 37/0 Mathlib/Data/Matroid/Closure.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] kmill
assignee:kmill
36-20132
1 month ago
36-20133
1 month ago
60-26324
60 days
26097 adomani
author:adomani
dev: the relative linter --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict awaiting-author WIP 316/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/Local.lean,Mathlib/Util/ParseGit.lean 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
35-83052
1 month ago
35-83053
1 month ago
0-0
0 seconds
26337 mans0954
author:mans0954
feat(Analysis/NormedSpace/MStructure): M-ideals This PR continues the work from #14369. Original PR: https://github.com/leanprover-community/mathlib4/pull/14369 large-import t-analysis merge-conflict WIP 857/40 Mathlib/Algebra/Module/End.lean,Mathlib/Algebra/Module/Hom.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Analysis/Normed/Module/Complemented.lean,Mathlib/Analysis/NormedSpace/MStructure.lean 5 n/a ['github-actions', 'mans0954', 'mathlib4-merge-conflict-bot'] nobody
35-16490
1 month ago
unknown
unknown
26343 mans0954
author:mans0954
feat(Analysis/Normed/Module/Complemented): The idempotent associated with a complemented subspace Given a complemented subspace `p` of a Banach space `E`, with complement `q`, there exists an idempotent `P` in the ring `E →L[𝕜] E` such that `P` has range `p` and kernel `q`. Similarly `1-P` has range `q` and kernel `p`. See Rudin, Functional Analysis, Theorem 5.16. --- This PR continues the work from #20330. Original PR: https://github.com/leanprover-community/mathlib4/pull/20330 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-analysis awaiting-CI merge-conflict WIP 185/3 Mathlib/Algebra/Module/End.lean,Mathlib/Algebra/Module/Hom.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Analysis/Normed/Module/Complemented.lean,Mathlib/RingTheory/Idempotents.lean 5 3 ['github-actions', 'mans0954', 'mathlib4-merge-conflict-bot'] nobody
35-16489
1 month ago
35-16490
1 month ago
0-0
0 seconds
28743 vihdzp
author:vihdzp
refactor: `Ordinal.IsNormal` → `Order.IsNormal` We deprecate `Ordinal.IsNormal` in favor of the more general `Order.IsNormal`. --- - [ ] depends on: #28740 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 280/156 Mathlib.lean,Mathlib/Order/IsNormal.lean,Mathlib/SetTheory/Cardinal/Aleph.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Enum.lean,Mathlib/SetTheory/Ordinal/Exponential.lean,Mathlib/SetTheory/Ordinal/Family.lean,Mathlib/SetTheory/Ordinal/FixedPoint.lean,Mathlib/SetTheory/Ordinal/Topology.lean,Mathlib/SetTheory/Ordinal/Veblen.lean,Mathlib/Topology/Order/Basic.lean,Mathlib/Topology/Order/IsNormal.lean 12 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
34-16008
1 month ago
34-16010
1 month ago
0-0
0 seconds
26931 javra
author:javra
feat(CategoryTheory/Enriched): `V`-enriched isomorphisms Defines isomorphisms in `V`-enriched categories and relate them to ordinary isomorphisms in the case of ordinary enriched categories. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) infinity-cosmos t-category-theory merge-conflict awaiting-author 211/14 Mathlib.lean,Mathlib/CategoryTheory/Enriched/Basic.lean,Mathlib/CategoryTheory/Enriched/Iso.lean,Mathlib/CategoryTheory/Enriched/Opposite.lean,Mathlib/CategoryTheory/Enriched/Ordinary/Basic.lean,Mathlib/CategoryTheory/Enriched/Ordinary/Iso.lean 6 21 ['emilyriehl', 'github-actions', 'javra', 'joelriou', 'mathlib4-merge-conflict-bot', 'mckoen'] nobody
32-59462
1 month ago
32-59463
1 month ago
19-77946
19 days
26912 pechersky
author:pechersky
chore(Algebra/Ring/Subring): simp tag `Subring.smul_def` s-multiplying by a subtype is easiest to manipulate when both terms are in the ambient type. Many places that had to use the _def lemma for a rewrite, or to include it in a simp set, no longer have to. Ported from #25308 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) I found this being not-simp frustrating when talking about submodules over a valuation subring. maintainer-merge t-algebra merge-conflict
label:t-algebra$
68/67 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/RootPositive.lean,Mathlib/LinearAlgebra/RootSystem/WeylGroup.lean,Mathlib/RingTheory/Etale/Kaehler.lean,Mathlib/RingTheory/LocalProperties/Projective.lean,Mathlib/RingTheory/Localization/InvSubmonoid.lean,Mathlib/RingTheory/OreLocalization/Basic.lean 25 19 ['artie2000', 'eric-wieser', 'github-actions', 'j-loreaux', 'linesthatinterlace', 'mathlib4-merge-conflict-bot', 'pechersky'] joelriou
assignee:joelriou
32-49917
1 month ago
32-49918
1 month ago
51-74059
51 days
22782 alreadydone
author:alreadydone
feat(Topology): étalé space associated to a predicate on sections --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 886/160 Mathlib.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/StructureSheaf.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Geometry/Manifold/Sheaf/Smooth.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Topology/EtaleSpace.lean,Mathlib/Topology/IsLocalHomeomorph.lean,Mathlib/Topology/Sheaves/LocalPredicate.lean,Mathlib/Topology/Sheaves/Sheafify.lean,Mathlib/Topology/Sheaves/Stalks.lean 10 16 ['AntoineChambert-Loir', 'alreadydone', 'github-actions', 'jcommelin', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] PatrickMassot
assignee:PatrickMassot
32-48286
1 month ago
59-12642
1 month ago
30-3459
30 days
25208 erdOne
author:erdOne
feat(LinearAlgebra): `tensor_induction` macro --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra RFC merge-conflict WIP
label:t-algebra$
87/116 Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Central/TensorProduct.lean,Mathlib/LinearAlgebra/DirectSum/Finsupp.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/RingTheory/Flat/Equalizer.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/Finite.lean,Mathlib/RingTheory/Unramified/Finite.lean 8 8 ['chrisflav', 'eric-wieser', 'github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] nobody
31-80829
1 month ago
31-80829
1 month ago
0-600
10 minutes
28803 astrainfinita
author:astrainfinita
refactor: unbundle algebra from `ENormed*` Further speed up the search in the algebraic typeclass hierarchy by avoiding searching for `TopologicalSpace`. This PR continues the work from #23961. - Change `ESeminormed(Add)Monoid` and `ENormed(Add)Monoid` so they no longer carry algebraic data. - Deprecate `ESeminormed(Add)CommMonoid` and `ENormed(Add)CommMonoid` in favor of `ESeminormed(Add)Monoid` and `ENormed(Add)Monoid` with a commutative algebraic typeclass. |Old|New| |---|---| | `[ESeminormed(Add)(Comm)Monoid E]` | `[(Add)(Comm)Monoid E] [ESeminormed(Add)Monoid E]` | | `[ENormed(Add)(Comm)Monoid]` | `[(Add)(Comm)Monoid E] [ENormed(Add)Monoid]` | See [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2328803.20refactor.3A.20unbundle.20algebra.20from.20.60ENormed*.60/with/536024350) ------------ - [x] depends on: #28813 awaiting-zulip slow-typeclass-synthesis t-algebra t-analysis merge-conflict
label:t-algebra$
80/63 Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/Normed/Group/InfiniteSum.lean,Mathlib/Analysis/NormedSpace/IndicatorFunction.lean,Mathlib/MeasureTheory/Function/L1Space/AEEqFun.lean,Mathlib/MeasureTheory/Function/L1Space/HasFiniteIntegral.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean 14 28 ['astrainfinita', 'bryangingechen', 'github-actions', 'grunweg', 'kbuzzard', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] grunweg
assignee:grunweg
31-11957
1 month ago
31-11958
1 month ago
0-20585
5 hours
26603 vihdzp
author:vihdzp
refactor(SetTheory/Ordinal/FixedPoint): redefine `Ordinal.deriv` We previously defined the [ordinal derivative](https://en.wikipedia.org/wiki/Normal_function#Properties) of a function as the unique normal function satisfying `deriv f 0 = nfp f 0` and `deriv f (o + 1) = nfp f (deriv f o)` (where `nfp f a` is the next fixed point of `f` that's `≥ a`). The motivation here was to give a "nice" junk value on non-normal functions (the derivative is normal no matter what). However, in practice, this definition makes it unwieldy to prove things, by either requiring a tedious zero/successor/limit argument, or requiring one to rewrite `deriv f = enumOrd (fixedPoints f)`. We can instead define `deriv f = enumOrd (fixedPoints f)`. At the cost of giving "worse" junk values (which we have no legitimate uses of), we're able to much more easily prove all the expected properties in the standard case where `f` is a normal function. Finally, we do some drive-by API cleanup. --- The GitHub diff is a bit messy, I made my best to clean it up. Moved from #21858. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory merge-conflict 173/200 Mathlib/SetTheory/Cardinal/Regular.lean,Mathlib/SetTheory/Ordinal/FixedPoint.lean,Mathlib/SetTheory/Ordinal/Veblen.lean 3 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
30-84045
1 month ago
30-84046
1 month ago
12-50686
12 days
25662 erdOne
author:erdOne
chore: redefine `LocalizedModule` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
196/228 Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/GroupTheory/OreLocalization/Basic.lean,Mathlib/GroupTheory/OreLocalization/OreSet.lean,Mathlib/RingTheory/OreLocalization/Ring.lean,Mathlib/RingTheory/TensorProduct/Nontrivial.lean 6 14 ['erdOne', 'eric-wieser', 'github-actions', 'kckennylau', 'leanprover-bot', 'leanprover-community-bot-assistant', 'vihdzp'] nobody
30-80769
1 month ago
30-81452
1 month ago
45-34308
45 days
29345 adomani
author:adomani
test: automatically remove deprecations from before 2025-02-31 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 201/1358 Mathlib/Algebra/Category/Grp/Basic.lean,Mathlib/Algebra/Category/MonCat/Basic.lean,Mathlib/Algebra/Order/Field/Canonical.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Analysis/InnerProductSpace/Positive.lean,Mathlib/Analysis/InnerProductSpace/Projection/Basic.lean,Mathlib/Combinatorics/Matroid/Circuit.lean,Mathlib/Combinatorics/Matroid/Closure.lean,Mathlib/Combinatorics/Matroid/Minor/Restrict.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/Primrec.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Fin/SuccPred.lean,Mathlib/Data/Finite/Card.lean,Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Fintype/BigOperators.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Cycle.lean,Mathlib/Data/List/GetD.lean,Mathlib/Data/List/MinMax.lean,Mathlib/Data/List/ModifyLast.lean,Mathlib/Data/List/Nodup.lean,Mathlib/Data/List/NodupEquivFin.lean,Mathlib/Data/List/OfFn.lean,Mathlib/Data/List/ReduceOption.lean,Mathlib/Data/List/Rotate.lean,Mathlib/Data/List/Scan.lean,Mathlib/Data/List/TakeDrop.lean,Mathlib/Data/List/Zip.lean,Mathlib/Data/Matrix/ColumnRowPartitioned.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Seq/Defs.lean,Mathlib/Data/Set/Finite/Basic.lean,Mathlib/Data/Set/List.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Data/Stream/Init.lean,Mathlib/Data/String/Lemmas.lean,Mathlib/Data/Sum/Basic.lean,Mathlib/Geometry/Manifold/ContMDiff/Constructions.lean,Mathlib/Geometry/RingedSpace/Basic.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/Pointwise.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Basic.lean,Mathlib/LinearAlgebra/Dimension/Constructions.lean,Mathlib/LinearAlgebra/Dimension/RankNullity.lean,Mathlib/LinearAlgebra/LinearIndependent/Basic.lean,Mathlib/LinearAlgebra/LinearIndependent/Defs.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Matrix/Hermitian.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/LinearAlgebra/Matrix/Spectrum.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Logic/Equiv/List.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/AEMeasurable.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Basic.lean,Mathlib/MeasureTheory/Function/ContinuousMapDense.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Function/LpSeminorm/ChebyshevMarkov.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Defs.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Trim.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/Complete.lean,Mathlib/MeasureTheory/Function/LpSpace/Indicator.lean,Mathlib/MeasureTheory/Function/StronglyMeasurable/Lp.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Integral/CircleTransform.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Countable.lean,Mathlib/MeasureTheory/Measure/Content.lean,Mathlib/MeasureTheory/Measure/Count.lean,Mathlib/ModelTheory/Basic.lean,Mathlib/ModelTheory/Definability.lean,Mathlib/ModelTheory/ElementarySubstructures.lean,Mathlib/ModelTheory/LanguageMap.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Substructures.lean,Mathlib/ModelTheory/Syntax.lean,Mathlib/NumberTheory/Divisors.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/IsBoundedAtImInfty.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/Basic.lean,Mathlib/NumberTheory/NumberField/FinitePlaces.lean,Mathlib/NumberTheory/NumberField/House.lean,Mathlib/Order/Filter/AtTopBot/Monoid.lean,Mathlib/Order/Filter/AtTopBot/Ring.lean,Mathlib/Order/GaloisConnection/Basic.lean,Mathlib/Order/Max.lean,Mathlib/Order/WithBot.lean,Mathlib/Probability/IdentDistrib.lean,Mathlib/Probability/Independence/Integrable.lean,Mathlib/Probability/Kernel/Composition/IntegralCompProd.lean,Mathlib/Probability/Kernel/Invariance.lean 132 0 [] nobody
29-45353
29 days ago
29-45353
29 days ago
0-49
49 seconds
27566 wwylele
author:wwylele
feat(Data/Real): Archimedean.embedReal is a ring hom when M is an ordered ring Also shows that this ends up the same as `LinearOrderedField.inducedOrderRingHom` for fields --- This is a spin-off from #27268 ~~because I got bored~~ . This is not in a high priority as I don't need it for anything yet, but the last lemma shows that `embedReal` is a generalization of `LinearOrderedField.inducedOrderRingHom` (which is only stated for field, and I didn't find when I was making the group embedding). Perhaps we should refactor `Mathlib/Algebra/Order/CompleteField.lean` with the definition here. Indeed, if we replace every `ℝ` with `(R : Type*)[ConditionallyCompleteLinearOrderedField R]` in `Data/Real/Embedding.lean`, the proof still works. What do you think? [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-data merge-conflict 220/3 Mathlib/Data/Real/Embedding.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
27-77475
27 days ago
27-77476
27 days ago
40-32085
40 days
28151 iehality
author:iehality
feat(Computability): r.e. sets are closed under inter/union/projection/composition Prove that r.e. sets are closed under intersections, unions, projection and composition. --- This PR continues the work from #16705. Original PR: https://github.com/leanprover-community/mathlib4/pull/16705 t-computability merge-conflict awaiting-author 120/0 Mathlib/Computability/Halting.lean 1 13 ['YaelDillies', 'github-actions', 'iehality', 'mathlib4-merge-conflict-bot'] YaelDillies
assignee:YaelDillies
25-64020
25 days ago
25-64021
25 days ago
9-70671
9 days
12143 adomani
author:adomani
feat: generic linter, absorbing `cdot` linter and `attribute [instance] in` linter A "generic" syntax linter that can be configured using a function `Syntax → Array Syntax`. The expectations is that the function returns sub-syntax extracted from the input that should be flagged by the linter. This PR provides two examples. * Flags uses of `cdot` that are not typed as `·`. * #12137 is a PR that inspired this one. * Flag uses of `attribute [instance] in` that is not limited to the next declaration * Inspired by the existing PR by Michael Rothgang #13190 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict 210/2 Mathlib.lean,Mathlib/Combinatorics/Colex.lean,Mathlib/NumberTheory/LegendreSymbol/AddCharacter.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/GenericSyntaxLinter.lean,test/GenericSyntaxLinter.lean 7 19 ['adomani', 'github-actions', 'grunweg', 'leanprover-bot'] nobody
25-52609
25 days ago
417-40744
1 year ago
41-49960
41 days
26908 robin-carlier
author:robin-carlier
feat(CategoryTheory/Monoidal/DayConvolution): alternative ext principle for unitors Currently, our infrastructure for left/right unitors for Day convolution of functors `C ⥤ V` do not have satisfactory extensionality principle: the current way to characterize morphisms out of `U ⊛ F` is the default extensionality principle for Day convolution, which characterizes first such functors via functors out of `U ⊠ F`. Left unitors are then obtained using the fact `U ⊠ F` is a left Kan extension of a functor from `PUnit × C` (which is equivalent to `C`) but we did not record on its own this principle. Using the transitivity of left Kan extensions proved in #26899, we directly exhibit `U ⊛ F` as a left Kan extension of `F ⋙ tensorLeft (𝟙_ V)` along `tensorLeft (𝟙_ C)`. The unit of this Kan extension is composed exactly of the morphisms that appear in the [characterization of left unitors](https://leanprover-community.github.io/mathlib4_docs/Mathlib/CategoryTheory/Monoidal/DayConvolution.html#CategoryTheory.MonoidalCategory.DayConvolutionUnit.leftUnitor_hom_unit_app). We also slightly generalize the instances that express that external products with unitors are left Kan extensions, so that they can be used when taking external products with more complicated functors than currently. This is again useful when chaining extensionality lemmas for morphisms out of terms of the form `(F ⊛ U) ⊛ G`. We prove a similar thing for right unitors With this, it should be possible to have a much more satisfactory way of working with Day convolutions: this allows to "elimiinate" units without ending up with terms in an external product. --- - [ ] depends on: #26899 - [ ] depends on: #26906 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict 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
25-44302
25 days ago
25-44303
25 days ago
0-1812
30 minutes
27150 robin-carlier
author:robin-carlier
feat(CategoryTheory/Monoidal/DayConvolution): constructors for braided and symmetric structure on day convolutions monoidal categories Following the pattern in #27119, we give API to construct `BraidedCategory` and `SymmetricCategory` structures on a monoidal category equipped with a `LawfulDayConvolutionMonoidalCategoryStruct`. To achieve this, we introduce an other type class `LawfulDayConvolutionBraidedCategoryStruct` that bundles an associator isomorphism that behaves like the one constructed for functors in #27067. We provide a noncomputable constructor for this typeclass that takes as input fullness of the "realization" functor to a category of functors, and we show that the typeclasses are sufficient to define the desired structures. --- - [x] depends on: #27067 - [x] depends on: #26820 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict 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
25-39341
25 days ago
25-40129
25 days ago
0-1002
16 minutes
27119 robin-carlier
author:robin-carlier
feat(CategoryTheory/Monoidal/DayConvolution): constructors for closed monoidal day convolution monoidal structures Following the pattern introduced in #26798 and #26820 and using results of #26879, we introduce a typeclass `LawfulDayConvolutionClosedMonoidalCategoryStruct` that encodes the data needed on a `LawfulDayConvolutionMonoidalCategoryStruct` to define well-behaved internal homs. We give a constructor assuming existence of relevant ends, and prove that this data defines a `MonoidalClosed` instance on the monoidal category structures one can deduce from `LawfulDayConvolutionMonoidalCategoryStruct`. --- - [x] depends on: #27079 - [x] depends on: #27091 - [x] depends on: #26879 - [x] depends on: #26820 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict 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
24-53192
24 days ago
25-40126
25 days ago
0-1
1 second
28411 zcyemi
author:zcyemi
feat(LinearAlgebra/AffineSpace/Simplex/Centroid): define centroid and medians --- This file proves several lemmas involving the centroids and medians of a simplex in affine space. definitions: - `centroid` is the centroid of a simplex, defined as abbreviation of the `Finset.univ.centroid`. - `faceOppositeCentroid` is the centroid of the facet obtained as `(Simplex.faceOpposite i).centroid` - `median` is the line connecting a vertex to the faceOppositeCentroid. Main Results: - Commandino's theorem - The medians of a simplex are concurrent at the centroid - [ ] depends on #29128 large-import t-algebra merge-conflict
label:t-algebra$
463/5 Mathlib/Geometry/Euclidean/MongePoint.lean,Mathlib/Geometry/Euclidean/Simplex.lean,Mathlib/LinearAlgebra/AffineSpace/Independent.lean,Mathlib/LinearAlgebra/AffineSpace/Simplex/Centroid.lean,docs/1000.yaml 5 9 ['github-actions', 'jsm28', 'mathlib4-merge-conflict-bot', 'zcyemi'] nobody
24-47177
24 days ago
24-47178
24 days ago
25-79919
25 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 --- new-contributor t-logic merge-conflict 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
24-47053
24 days ago
24-47054
24 days ago
21-3001
21 days
24692 ScottCarnahan
author:ScottCarnahan
feat (RingTheory/HahnSeries/Basic): isomorphism of Hahn series induced by order isomorphism This PR introduces an isomorphism of Hahn series induced by an order isomorphism on the exponent posets. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict WIP 35/0 Mathlib/RingTheory/HahnSeries/Basic.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
24-23433
24 days ago
24-23434
24 days ago
31-47622
31 days
28737 astrainfinita
author:astrainfinita
refactor: deprecate `MulEquivClass` This PR continues the work from #18806. Original PR: https://github.com/leanprover-community/mathlib4/pull/18806 maintainer-merge t-algebra merge-conflict awaiting-author
label:t-algebra$
67/77 Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Algebra/Group/Irreducible/Lemmas.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/Units/Equiv.lean,Mathlib/Algebra/GroupWithZero/Equiv.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Prime/Lemmas.lean,Mathlib/Algebra/Ring/Divisibility/Basic.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/Star/MonoidHom.lean,Mathlib/Combinatorics/Additive/FreimanHom.lean,Mathlib/GroupTheory/GroupExtension/Defs.lean,Mathlib/GroupTheory/Submonoid/Center.lean,Mathlib/LinearAlgebra/FreeModule/Finite/CardQuotient.lean,Mathlib/RingTheory/Bialgebra/Equiv.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/RingTheory/UniqueFactorizationDomain/NormalizedFactors.lean,Mathlib/Topology/Algebra/ContinuousMonoidHom.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean 26 20 ['Vierkantor', 'alreadydone', 'astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] Vierkantor
assignee:Vierkantor
23-53777
23 days ago
23-53778
23 days ago
4-17723
4 days
13036 joelriou
author:joelriou
feat(CategoryTheory/Sites): under certain conditions, cover preserving functors preserve 1-hypercovers Previously, in order to show that a functor between Grothendieck sites was continuous, it was necessary to show that it was "cover preserving" and "compatible preserving". There were two lemmas which could be used in order to show that a functor was "compatible preserving". Since #13012, the better condition of "1-hypercover preserving" functor was introduced and it implies that the functor is continuous. In this PR, under the same assumptions as in the two lemmas mentionned above, we show that cover preserving functors are 1-hypercover preserving functors. This gives slightly better criteria in order to show that a functor is continuous. --- - [x] depends on: #13004 - [x] depends on: #13011 - [x] depends on: #13012 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict WIP 94/7 Mathlib/CategoryTheory/Sites/Continuous.lean,Mathlib/CategoryTheory/Sites/CoverPreserving.lean,Mathlib/CategoryTheory/Sites/Over.lean,Mathlib/CategoryTheory/Sites/Sieves.lean 4 3 ['github-actions', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] nobody
23-16377
23 days ago
23-16378
23 days ago
0-0
0 seconds
27335 eric-wieser
author:eric-wieser
chore(Data/List): use simp-normal-form for boolean equalities This replaces `¬(p x = true)` with `p x = false`. It also makes explicit some adjacent `h : p x` spellings for symmetry, but the `= true`s were already implied by the coercion. Zulip: [#lean4 > `h : ¬(b = true)` vs `h : b = false` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.60h.20.3A.20.C2.AC.28b.20.3D.20true.29.60.20vs.20.60h.20.3A.20b.20.3D.20false.60/near/529976237) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 38/32 Mathlib/Data/List/DropRight.lean,Mathlib/Data/List/SplitOn.lean,Mathlib/Data/List/TakeWhile.lean 3 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
23-19
23 days ago
23-20
22 days ago
4-31215
4 days
29499 chrisflav
author:chrisflav
feat(CategoryTheory/Sites): sheafification via hypercovers This is very much WIP, but I need a fresh cache. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict WIP 2121/1 Mathlib.lean,Mathlib/CategoryTheory/Sites/HomotopyOneHypercover.lean,Mathlib/CategoryTheory/Sites/Hypercover/Refinement.lean,Mathlib/CategoryTheory/Sites/Hypercover/Sheafification.lean,Mathlib/CategoryTheory/Sites/OneHypercover.lean,Mathlib/CategoryTheory/Sites/ZeroHypercover.lean 6 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
22-56925
22 days ago
22-56926
22 days ago
0-0
0 seconds
29484 eric-wieser
author:eric-wieser
refactor: switch to [] notation for Stream' I'll continue fixing this only if people agree this is a good use of this notation. [#mathlib4 > Changing `Stream.Seq` to use `GetElem` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Changing.20.60Stream.2ESeq.60.20to.20use.20.60GetElem.60/near/538548680) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-data merge-conflict 195/173 Mathlib/Algebra/ContinuedFractions/Basic.lean,Mathlib/Algebra/ContinuedFractions/Computation/Basic.lean,Mathlib/Algebra/ContinuedFractions/Translations.lean,Mathlib/Combinatorics/Hindman.lean,Mathlib/Control/Fix.lean,Mathlib/Control/LawfulFix.lean,Mathlib/Data/Seq/Computation.lean,Mathlib/Data/Seq/Defs.lean,Mathlib/Data/Stream/Defs.lean,Mathlib/Data/Stream/Init.lean,Mathlib/Data/WSeq/Basic.lean,Mathlib/Data/WSeq/Productive.lean 12 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
22-15038
22 days ago
22-56927
22 days ago
0-0
0 seconds
22517 j-loreaux
author:j-loreaux
feat: `ℕ+` powers in semigroups --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict WIP 275/28 Mathlib.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/PNatPowAssoc.lean,Mathlib/Algebra/Group/PPow.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/Ring/ULift.lean,Mathlib/Data/Num/Lemmas.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Data/ZMod/Defs.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/NumberTheory/Dioph.lean,Mathlib/Tactic/ToAdditive/Frontend.lean 14 6 ['eric-wieser', 'github-actions', 'j-loreaux', 'leanprover-bot', 'mattrobball'] nobody
21-20360
21 days ago
203-71970
6 months ago
0-27
27 seconds
26857 Thmoas-Guan
author:Thmoas-Guan
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. Further results would be given in #26858 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) migrated from #22631 t-algebra merge-conflict awaiting-author
label:t-algebra$
153/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean 2 12 ['Thmoas-Guan', 'chrisflav', 'github-actions', 'mathlib4-merge-conflict-bot'] chrisflav
assignee:chrisflav
20-86080
20 days ago
20-86081
20 days ago
18-81638
18 days
27933 grunweg
author:grunweg
chore(OrdNode): format code example in code blocks Wrap them in code blocks (and unindent them; that indentation is not needed any more). This also avoids warnings from the linter in #27898. ------- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 459/212 Mathlib/Data/Ordmap/Ordnode.lean 1 4 ['eric-wieser', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
20-84086
20 days ago
20-84087
20 days ago
39-69478
39 days
28802 grunweg
author:grunweg
feat: a tactic linter for continuity/measurability which can be `fun_prop` --- Let's see if this finds further locations in mathlib :tada: This PR also runs the linter in mathlib by default. I strongly think this is a good idea --- but leaves all kinds of fun questions around "where do you import this linter best". Opinions on this welcome; this PR is a first start (but no more). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import awaiting-CI t-meta merge-conflict 144/26 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Basic.lean,Mathlib/Tactic/TacticAnalysis/Declarations.lean,Mathlib/Tactic/TacticAnalysis/FunProp.lean,MathlibTest/TacticAnalysis2.lean 6 12 ['Vierkantor', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
20-46344
20 days ago
20-46345
20 days ago
0-260
4 minutes
27508 chrisflav
author:chrisflav
feat(RingTheory): height under ring homomorphism We show that if `P` lies over `p`, the height of `P` is bounded by the height of `p` plus the height of the image of `P` in `S ⧸ p S`. In a follow-up PR, we show that equality holds if `S` satisfies going-down as an `R`-algebra. Co-authored by: Sihan Su Co-authored by: Yi Song --- - [x] depends on: #28520 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import merge-conflict 118/1 Mathlib/Data/Set/Finite/Basic.lean,Mathlib/Data/Set/Function.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Basic.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean 7 13 ['YaelDillies', 'chrisflav', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
20-26388
20 days ago
37-29309
1 month ago
1-25924
1 day
29633 sgouezel
author:sgouezel
Just for bench --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1046/690 .github/actionlint.yml,.github/workflows/nightly-docgen.yml,.github/workflows/nightly_detect_failure.yml,.github/workflows/report-grind-regressions.yml,Cache/Requests.lean,Mathlib.lean,Mathlib/Algebra/Field/Rat.lean,Mathlib/Algebra/Homology/ExactSequence.lean,Mathlib/Algebra/Order/Ring/Rat.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/Algebra/Polynomial/Eval/Defs.lean,Mathlib/Algebra/Polynomial/Eval/SMul.lean,Mathlib/Algebra/Ring/Rat.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/SpecialFunctions/Log/Summable.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/Computability/TMToPartrec.lean,Mathlib/Data/DFinsupp/Notation.lean,Mathlib/Data/FP/Basic.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Int/Bitwise.lean,Mathlib/Data/Int/GCD.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/Nat/GCD/Basic.lean,Mathlib/Data/Nat/GCD/BigOperators.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Nat/Prime/Defs.lean,Mathlib/Data/Rat/Cast/Defs.lean,Mathlib/Data/Rat/Defs.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Data/Rat/Lemmas.lean,Mathlib/Data/Seq/Basic.lean,Mathlib/Data/UInt.lean,Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/GroupTheory/Perm/Centralizer.lean,Mathlib/Init.lean,Mathlib/Lean/Expr/Rat.lean,Mathlib/Lean/Meta/CongrTheorems.lean,Mathlib/LinearAlgebra/PID.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/LinearAlgebra/Vandermonde.lean,Mathlib/Logic/Equiv/Prod.lean,Mathlib/NumberTheory/Ostrowski.lean,Mathlib/NumberTheory/Padics/PadicVal/Basic.lean,Mathlib/Order/Defs/LinearOrder.lean,Mathlib/Order/Defs/PartialOrder.lean,Mathlib/Order/Disjoint.lean,Mathlib/Order/Filter/Defs.lean,Mathlib/Probability/Distributions/Pareto.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Reassoc.lean,Mathlib/Tactic/CategoryTheory/Refs.lean,Mathlib/Tactic/DeriveFintype.lean,Mathlib/Tactic/FieldSimp.lean,Mathlib/Tactic/Hint.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm/Datatypes.lean,Mathlib/Tactic/Linter/DeprecatedModule.lean,Mathlib/Tactic/Linter/Header.lean,Mathlib/Tactic/Linter/Lint.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Tactic/NormNum/GCD.lean,Mathlib/Tactic/StacksAttribute.lean,Mathlib/Tactic/SuppressCompilation.lean,Mathlib/Tactic/ToAdditive/Frontend.lean,Mathlib/Tactic/WLOG.lean,Mathlib/Testing/Plausible/Sampleable.lean,Mathlib/Util/Notation3.lean,Mathlib/Util/ParseCommand.lean,Mathlib/Util/Superscript.lean,MathlibTest/AssertExists.lean,MathlibTest/CalcQuestionMark.lean,MathlibTest/Change.lean,MathlibTest/DeprecateTo.lean,MathlibTest/FieldSimp.lean,MathlibTest/FindSyntax.lean,MathlibTest/LibrarySearch/basic.lean,MathlibTest/LibrarySearch/mathlib.lean,MathlibTest/LibrarySearch/observe.lean,MathlibTest/MinImports.lean,MathlibTest/RewriteSearch/Basic.lean,MathlibTest/RewriteSearch/Polynomial.lean,MathlibTest/StacksAttribute.lean,MathlibTest/Subsingleton.lean,MathlibTest/Use.lean,MathlibTest/Variable.lean,MathlibTest/hint.lean,MathlibTest/lift.lean,MathlibTest/linarith.lean,MathlibTest/notation3.lean,MathlibTest/propose.lean,MathlibTest/renameBvar.lean,MathlibTest/rewrites.lean,MathlibTest/ring.lean,MathlibTest/says.lean,MathlibTest/success_if_fail_with_msg.lean,MathlibTest/toAdditive.lean,lake-manifest.json 103 1 ['sgouezel'] nobody
19-68328
19 days ago
19-68380
19 days ago*
0-0
0 seconds*
25069 erdOne
author:erdOne
feat(EllipticCurve): rational points of singular nodal cubics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry merge-conflict awaiting-author 251/0 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Singular/Node.lean 3 14 ['Multramate', 'acmepjz', 'chrisflav', 'erdOne', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] chrisflav
assignee:chrisflav
19-35561
19 days ago
19-35561
19 days ago
100-22151
100 days
25070 erdOne
author:erdOne
feat(EllipticCurve): rational points on singular cuspidal cubics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry merge-conflict awaiting-author 123/0 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Singular/Cusp.lean 2 12 ['Multramate', 'acmepjz', 'adamtopaz', 'erdOne', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] adamtopaz
assignee:adamtopaz
19-35560
19 days ago
19-35560
19 days ago
90-52970
90 days
29574 JarodUW
author:JarodUW
Regular local rings are domains We have added three new files in Mathlib/RingTheory/LocalRing * EmbeddingDimension.lean * LocalRingDimension.lean * RegularLocalRings.lean We have added two lemmas and an instance in Mathlib/RingTheory/LocalRing/RingHom/Basic.lean This work was done by Jarod Alper and Brian Nugent. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor merge-conflict 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
18-85402
18 days ago
18-85403
18 days ago
3-7974
3 days
26670 yu-yama
author:yu-yama
feat(GroupExtension/Abelian): define `conjClassesEquivH1` This PR continues the work from #21837. Original PR: https://github.com/leanprover-community/mathlib4/pull/21837 t-algebra merge-conflict awaiting-author
label:t-algebra$
162/5 Mathlib.lean,Mathlib/GroupTheory/GroupExtension/Abelian.lean,Mathlib/GroupTheory/GroupExtension/Basic.lean,Mathlib/GroupTheory/GroupExtension/Defs.lean,docs/references.bib 5 3 ['erdOne', 'github-actions', 'mathlib4-merge-conflict-bot', 'yu-yama'] erdOne
assignee:erdOne
18-63854
18 days ago
18-63854
18 days ago
49-15167
49 days
26154 ADedecker
author:ADedecker
refactor: add refactored APIs for algebraic filter bases This PR continues the work from #18437. Original PR: https://github.com/leanprover-community/mathlib4/pull/18437 t-topology merge-conflict 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
18-59297
18 days ago
18-59298
18 days ago
87-79752
87 days
27024 grunweg
author:grunweg
feat: Gram-Schmidt orthonormalisation for sections of a vector bundle Add a parametrised version of Gram-Schmidt, for sections of a topological vector bundle with a bundle metric. This will be used to define orthonormal local frames. From the path towards geodesics and the Levi-Civita connection. Co-authored-by: Patrick Massot --- - [x] depends on: #27023 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict awaiting-author 279/11 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Topology/VectorBundle/GramSchmidtOrtho.lean,scripts/noshake.json 4 71 ['faenuccio', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] sgouezel
assignee:sgouezel
18-49954
18 days ago
18-49955
18 days ago
28-73015
28 days
28580 kmill
author:kmill
refactor: simplify implementation of `filter_upwards` This PR makes a few changes to `filter_upwards`: - it uses `focus`, which prevents multiGoalLinter from ever blaming the tactics used inside its implementation - it constructs the whole proof syntax and elaborates it at once using `evalTactic` and `refine`, rather than using the lower-level TermElab API, which can lose track of goals - it's written in a way that doesn't require goals to be in some particular order This was motivated by some multiGoalLinter issues I ran into when working on https://github.com/leanprover/lean4/pull/9942 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order t-meta merge-conflict 14/16 Mathlib/Order/Filter/Defs.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
18-47913
18 days ago
18-47914
18 days ago
28-42873
28 days
29605 alreadydone
author:alreadydone
experiment(Algebra): unbundle npow/zpow from Monoid/InvDivMonoid --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-CI merge-conflict
label:t-algebra$
1527/1020 Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Defs.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Defs.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/BigOperators/Ring/Multiset.lean,Mathlib/Algebra/Category/MonCat/ForgetCorepresentable.lean,Mathlib/Algebra/Divisibility/Basic.lean,Mathlib/Algebra/Divisibility/Units.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Field/Power.lean,Mathlib/Algebra/Field/Rat.lean,Mathlib/Algebra/Group/Action/Basic.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/Commute/Basic.lean,Mathlib/Algebra/Group/Commute/Defs.lean,Mathlib/Algebra/Group/Commute/Units.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Group/Even.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Fin/Basic.lean,Mathlib/Algebra/Group/Finsupp.lean,Mathlib/Algebra/Group/Hom/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Hom/End.lean,Mathlib/Algebra/Group/Hom/Instances.lean,Mathlib/Algebra/Group/Idempotent.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/Group/Int/Defs.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Irreducible/Lemmas.lean,Mathlib/Algebra/Group/Nat/Defs.lean,Mathlib/Algebra/Group/Nat/Hom.lean,Mathlib/Algebra/Group/NatPowAssoc.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/PUnit.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/Semiconj/Basic.lean,Mathlib/Algebra/Group/Semiconj/Defs.lean,Mathlib/Algebra/Group/Semiconj/Units.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Group/Subgroup/Lattice.lean,Mathlib/Algebra/Group/Subgroup/ZPowers/Basic.lean,Mathlib/Algebra/Group/Submonoid/BigOperators.lean,Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Support.lean,Mathlib/Algebra/Group/Torsion.lean,Mathlib/Algebra/Group/TransferInstance.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Group/ULift.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Commute.lean,Mathlib/Algebra/GroupWithZero/Conj.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Divisibility.lean,Mathlib/Algebra/GroupWithZero/Hom.lean,Mathlib/Algebra/GroupWithZero/Indicator.lean,Mathlib/Algebra/GroupWithZero/InjSurj.lean,Mathlib/Algebra/GroupWithZero/Semiconj.lean,Mathlib/Algebra/GroupWithZero/ULift.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/GroupWithZero/Units/Lemmas.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/NoZeroSMulDivisors/Defs.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/BigOperators/Group/List.lean,Mathlib/Algebra/Order/BigOperators/Group/Multiset.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/List.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/Multiset.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Action.lean,Mathlib/Algebra/Order/Group/Basic.lean,Mathlib/Algebra/Order/Group/DenselyOrdered.lean,Mathlib/Algebra/Order/Group/Finset.lean,Mathlib/Algebra/Order/Group/Lattice.lean,Mathlib/Algebra/Order/Group/Multiset.lean,Mathlib/Algebra/Order/Group/PosPart.lean,Mathlib/Algebra/Order/Group/Synonym.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean 162 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
18-38548
18 days ago
18-38549
18 days ago
0-2
2 seconds
29614 sgouezel
author:sgouezel
Sg test4 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 2788/3328 .github/actionlint.yml,.github/workflows/nightly-docgen.yml,.github/workflows/nightly_detect_failure.yml,.github/workflows/report-grind-regressions.yml,Cache/Requests.lean,Mathlib.lean,Mathlib/Algebra/Algebra/RestrictScalars.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Field/Rat.lean,Mathlib/Algebra/Homology/ExactSequence.lean,Mathlib/Algebra/Order/Ring/Rat.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/Algebra/Polynomial/Eval/Defs.lean,Mathlib/Algebra/Polynomial/Eval/SMul.lean,Mathlib/Algebra/Ring/InjSurj.lean,Mathlib/Algebra/Ring/Rat.lean,Mathlib/Algebra/Ring/Subring/Defs.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/CStarAlgebra/ApproximateUnit.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/Classes.lean,Mathlib/Analysis/CStarAlgebra/CompletelyPositiveMap.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/CStarAlgebra/ContinuousLinearMap.lean,Mathlib/Analysis/CStarAlgebra/ContinuousMap.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Defs.lean,Mathlib/Analysis/CStarAlgebra/Multiplier.lean,Mathlib/Analysis/CStarAlgebra/Unitization.lean,Mathlib/Analysis/CStarAlgebra/lpSpace.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/DSlope.lean,Mathlib/Analysis/Calculus/Deriv/CompMul.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/DiffContOnCl.lean,Mathlib/Analysis/Calculus/FDeriv/Equiv.lean,Mathlib/Analysis/Calculus/FDeriv/Mul.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/LineDeriv/QuadraticMap.lean,Mathlib/Analysis/Calculus/MeanValue.lean,Mathlib/Analysis/Calculus/SmoothSeries.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Complex/Norm.lean,Mathlib/Analysis/Complex/Tietze.lean,Mathlib/Analysis/Fourier/FourierTransform.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/Calculus.lean,Mathlib/Analysis/InnerProductSpace/Completion.lean,Mathlib/Analysis/InnerProductSpace/Defs.lean,Mathlib/Analysis/InnerProductSpace/MulOpposite.lean,Mathlib/Analysis/InnerProductSpace/OfNorm.lean,Mathlib/Analysis/InnerProductSpace/Orthonormal.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/ProdL2.lean,Mathlib/Analysis/InnerProductSpace/Projection/Minimal.lean,Mathlib/Analysis/InnerProductSpace/Subspace.lean,Mathlib/Analysis/InnerProductSpace/l2Space.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Matrix.lean,Mathlib/Analysis/Meromorphic/Basic.lean,Mathlib/Analysis/Normed/Affine/ContinuousAffineMap.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/TrivSqZeroExt.lean,Mathlib/Analysis/Normed/Algebra/Unitization.lean,Mathlib/Analysis/Normed/Algebra/UnitizationL1.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Field/WithAbs.lean,Mathlib/Analysis/Normed/Group/AddCircle.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Completion.lean,Mathlib/Analysis/Normed/Group/Constructions.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/Normed/Group/Hom.lean,Mathlib/Analysis/Normed/Group/Int.lean,Mathlib/Analysis/Normed/Group/Quotient.lean,Mathlib/Analysis/Normed/Group/Rat.lean,Mathlib/Analysis/Normed/Group/SemiNormedGrp.lean,Mathlib/Analysis/Normed/Group/Subgroup.lean,Mathlib/Analysis/Normed/Group/Submodule.lean,Mathlib/Analysis/Normed/Group/Ultra.lean,Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Module/Completion.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/Normed/Operator/BoundedLinearMaps.lean,Mathlib/Analysis/Normed/Order/Hom/Basic.lean,Mathlib/Analysis/Normed/Order/Hom/Ultra.lean 251 1 ['sgouezel'] nobody
17-49475
17 days ago
20-68117
20 days ago*
0-0
0 seconds*
27843 JovanGerb
author:JovanGerb
chore(Algebra/Order/Sub/Defs): `@[gcongr low]` for `tsub_le_tsub` This PR explicitly lowers the `gcongr` priority of `tsub_le_tsub`. It also golfs some proofs using this `gcongr` lemma --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 33/36 Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/AlgebraicGeometry/EllipticCurve/DivisionPolynomial/Degree.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Metric.lean,Mathlib/Combinatorics/Hall/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Copy.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Uniform.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Nat/Squarefree.lean,Mathlib/MeasureTheory/Integral/Bochner/VitaliCaratheodory.lean,Mathlib/RingTheory/Polynomial/Pochhammer.lean,Mathlib/Topology/ContinuousMap/Polynomial.lean 14 10 ['JovanGerb', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
17-46192
17 days ago
17-46193
17 days ago
0-0
0 seconds
29741 JovanGerb
author:JovanGerb
trying #28803 using lean#10178 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1111/718 .github/actionlint.yml,.github/workflows/nightly-docgen.yml,.github/workflows/nightly_detect_failure.yml,.github/workflows/report-grind-regressions.yml,Cache/Requests.lean,Mathlib.lean,Mathlib/Algebra/Field/Rat.lean,Mathlib/Algebra/Homology/ExactSequence.lean,Mathlib/Algebra/Order/Ring/Rat.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/Algebra/Polynomial/Eval/Defs.lean,Mathlib/Algebra/Polynomial/Eval/SMul.lean,Mathlib/Algebra/Ring/Rat.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/SpecialFunctions/Log/Summable.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/Computability/TMToPartrec.lean,Mathlib/Data/DFinsupp/Notation.lean,Mathlib/Data/FP/Basic.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Int/Bitwise.lean,Mathlib/Data/Int/GCD.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/Nat/GCD/Basic.lean,Mathlib/Data/Nat/GCD/BigOperators.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Nat/Prime/Defs.lean,Mathlib/Data/Rat/Cast/Defs.lean,Mathlib/Data/Rat/Defs.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Data/Rat/Lemmas.lean,Mathlib/Data/Seq/Basic.lean,Mathlib/Data/UInt.lean,Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/GroupTheory/Perm/Centralizer.lean,Mathlib/Init.lean,Mathlib/Lean/Expr/Rat.lean,Mathlib/Lean/Meta/CongrTheorems.lean,Mathlib/LinearAlgebra/PID.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/LinearAlgebra/Vandermonde.lean,Mathlib/Logic/Equiv/Prod.lean,Mathlib/NumberTheory/Ostrowski.lean,Mathlib/NumberTheory/Padics/PadicVal/Basic.lean,Mathlib/Order/Defs/LinearOrder.lean,Mathlib/Order/Defs/PartialOrder.lean,Mathlib/Order/Disjoint.lean,Mathlib/Order/Filter/Defs.lean,Mathlib/Probability/Distributions/Pareto.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Reassoc.lean,Mathlib/Tactic/CategoryTheory/Refs.lean,Mathlib/Tactic/DeriveFintype.lean,Mathlib/Tactic/FieldSimp.lean,Mathlib/Tactic/Hint.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm/Datatypes.lean,Mathlib/Tactic/Linter/DeprecatedModule.lean,Mathlib/Tactic/Linter/Header.lean,Mathlib/Tactic/Linter/Lint.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Tactic/NormNum/GCD.lean,Mathlib/Tactic/StacksAttribute.lean,Mathlib/Tactic/SuppressCompilation.lean,Mathlib/Tactic/ToAdditive/Frontend.lean,Mathlib/Tactic/WLOG.lean,Mathlib/Testing/Plausible/Sampleable.lean,Mathlib/Util/Notation3.lean,Mathlib/Util/ParseCommand.lean,Mathlib/Util/Superscript.lean,MathlibTest/AssertExists.lean,MathlibTest/CalcQuestionMark.lean,MathlibTest/Change.lean,MathlibTest/DeprecateTo.lean,MathlibTest/FieldSimp.lean,MathlibTest/FindSyntax.lean,MathlibTest/LibrarySearch/basic.lean,MathlibTest/LibrarySearch/mathlib.lean,MathlibTest/LibrarySearch/observe.lean,MathlibTest/MinImports.lean,MathlibTest/RewriteSearch/Basic.lean,MathlibTest/RewriteSearch/Polynomial.lean,MathlibTest/StacksAttribute.lean,MathlibTest/Subsingleton.lean,MathlibTest/Use.lean,MathlibTest/Variable.lean,MathlibTest/hint.lean,MathlibTest/lift.lean,MathlibTest/linarith.lean,MathlibTest/notation3.lean,MathlibTest/propose.lean,MathlibTest/renameBvar.lean,MathlibTest/rewrites.lean,MathlibTest/ring.lean,MathlibTest/says.lean,MathlibTest/success_if_fail_with_msg.lean 105 n/a ['JovanGerb', 'leanprover-bot'] nobody
16-58099
16 days ago
unknown
unknown
29750 sgouezel
author:sgouezel
Branch just before the class_abbrev core PR, just for benching Branch just before the class_abbrev core PR, just for benching --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1041/684 .github/actionlint.yml,.github/workflows/nightly-docgen.yml,.github/workflows/nightly_detect_failure.yml,.github/workflows/report-grind-regressions.yml,Cache/Requests.lean,Mathlib.lean,Mathlib/Algebra/Field/Rat.lean,Mathlib/Algebra/Homology/ExactSequence.lean,Mathlib/Algebra/Order/Ring/Rat.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/Algebra/Polynomial/Eval/Defs.lean,Mathlib/Algebra/Polynomial/Eval/SMul.lean,Mathlib/Algebra/Ring/Rat.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/SpecialFunctions/Log/Summable.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/Computability/TMToPartrec.lean,Mathlib/Data/DFinsupp/Notation.lean,Mathlib/Data/FP/Basic.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Int/Bitwise.lean,Mathlib/Data/Int/GCD.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/Nat/GCD/Basic.lean,Mathlib/Data/Nat/GCD/BigOperators.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Nat/Prime/Defs.lean,Mathlib/Data/Rat/Cast/Defs.lean,Mathlib/Data/Rat/Defs.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Data/Rat/Lemmas.lean,Mathlib/Data/Seq/Basic.lean,Mathlib/Data/UInt.lean,Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/GroupTheory/Perm/Centralizer.lean,Mathlib/Init.lean,Mathlib/Lean/Expr/Rat.lean,Mathlib/LinearAlgebra/PID.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/LinearAlgebra/Vandermonde.lean,Mathlib/Logic/Equiv/Prod.lean,Mathlib/NumberTheory/Ostrowski.lean,Mathlib/NumberTheory/Padics/PadicVal/Basic.lean,Mathlib/Order/Defs/LinearOrder.lean,Mathlib/Order/Defs/PartialOrder.lean,Mathlib/Order/Disjoint.lean,Mathlib/Order/Filter/Defs.lean,Mathlib/Probability/Distributions/Pareto.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Reassoc.lean,Mathlib/Tactic/CategoryTheory/Refs.lean,Mathlib/Tactic/DeriveFintype.lean,Mathlib/Tactic/FieldSimp.lean,Mathlib/Tactic/Hint.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm/Datatypes.lean,Mathlib/Tactic/Linter/DeprecatedModule.lean,Mathlib/Tactic/Linter/Header.lean,Mathlib/Tactic/Linter/Lint.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Tactic/NormNum/GCD.lean,Mathlib/Tactic/StacksAttribute.lean,Mathlib/Tactic/SuppressCompilation.lean,Mathlib/Tactic/ToAdditive/Frontend.lean,Mathlib/Tactic/WLOG.lean,Mathlib/Testing/Plausible/Sampleable.lean,Mathlib/Util/Notation3.lean,Mathlib/Util/ParseCommand.lean,Mathlib/Util/Superscript.lean,MathlibTest/AssertExists.lean,MathlibTest/CalcQuestionMark.lean,MathlibTest/Change.lean,MathlibTest/DeprecateTo.lean,MathlibTest/FieldSimp.lean,MathlibTest/FindSyntax.lean,MathlibTest/LibrarySearch/basic.lean,MathlibTest/LibrarySearch/mathlib.lean,MathlibTest/LibrarySearch/observe.lean,MathlibTest/MinImports.lean,MathlibTest/RewriteSearch/Basic.lean,MathlibTest/RewriteSearch/Polynomial.lean,MathlibTest/StacksAttribute.lean,MathlibTest/Subsingleton.lean,MathlibTest/Use.lean,MathlibTest/Variable.lean,MathlibTest/hint.lean,MathlibTest/lift.lean,MathlibTest/linarith.lean,MathlibTest/notation3.lean,MathlibTest/propose.lean,MathlibTest/renameBvar.lean,MathlibTest/rewrites.lean,MathlibTest/ring.lean,MathlibTest/says.lean,MathlibTest/success_if_fail_with_msg.lean,MathlibTest/toAdditive.lean,lake-manifest.json,lakefile.lean,lean-toolchain 101 1 ['sgouezel'] nobody
16-44701
16 days ago
16-44760
16 days ago*
0-0
0 seconds*
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`. --- - [ ] depends on: #26824 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict 1372/19 Mathlib.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/DayFunctor.lean 4 n/a ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
16-23089
16 days ago
unknown
unknown
7125 eric-wieser
author:eric-wieser
feat: additive monoid structure via biproducts I suspect I'm missing a trick with these transport lemmas. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-CI merge-conflict WIP 237/0 Mathlib/CategoryTheory/Limits/Skeleton.lean 1 3 ['alreadydone', 'eric-wieser', 'mathlib4-merge-conflict-bot'] nobody
16-21018
16 days ago
16-21019
16 days ago
0-0
0 seconds
28769 chrisflav
author:chrisflav
feat(RingTheory/Extension/Cotangent): presentation is submersive if `I/I²` has a suitable basis Let `P` be a presentation of an algebra with kernel `I`. We show that if `I/I²` has a basis given by the images of the relations and the module of Kaehler differentials has a basis given by the differentials of the free generators (those that don't appear in the Jacobian matrix), then `P` is submersive. We will later deduce from this a presentation-independent characterization of standard smooth algebras. From Pi1. --- - [ ] depends on: #28767 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import merge-conflict 917/561 Mathlib.lean,Mathlib/Algebra/Module/Submodule/Ker.lean,Mathlib/Algebra/Module/Submodule/LinearMap.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Module/Submodule/Range.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/LinearAlgebra/Basis/Exact.lean,Mathlib/LinearAlgebra/Determinant.lean,Mathlib/LinearAlgebra/Finsupp/Defs.lean,Mathlib/LinearAlgebra/Finsupp/Span.lean,Mathlib/LinearAlgebra/Finsupp/Supported.lean,Mathlib/LinearAlgebra/Finsupp/VectorSpace.lean,Mathlib/LinearAlgebra/LinearIndependent/Defs.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Projection.lean,Mathlib/RingTheory/Extension/Cotangent/Basic.lean,Mathlib/RingTheory/Extension/Cotangent/Free.lean,Mathlib/RingTheory/Extension/Presentation/Submersive.lean,Mathlib/RingTheory/Smooth/StandardSmooth.lean 19 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
15-61807
15 days ago
15-61809
15 days ago
0-655
10 minutes
25138 chrisflav
author:chrisflav
chore(RingTheory/Ideal): make `RingHom.ker` take a `RingHom` instead of `RingHomClass` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
105/95 Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/Algebra/Category/CommAlgCat/FiniteType.lean,Mathlib/Algebra/Polynomial/Module/AEval.lean,Mathlib/Combinatorics/Nullstellensatz.lean,Mathlib/FieldTheory/Minpoly/Field.lean,Mathlib/LinearAlgebra/TensorProduct/RightExactness.lean,Mathlib/RingTheory/Algebraic/Basic.lean,Mathlib/RingTheory/FinitePresentation.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Localization/Algebra.lean,Mathlib/RingTheory/Nilpotent/Lemmas.lean,Mathlib/RingTheory/NoetherNormalization.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/Topology/Algebra/Module/CharacterSpace.lean,Mathlib/Topology/ContinuousMap/Ideals.lean,Mathlib/Topology/ContinuousMap/StoneWeierstrass.lean 18 6 ['chrisflav', 'erdOne', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
15-38446
15 days ago
15-38447
15 days ago
16-338
16 days
26983 mans0954
author:mans0954
feat(Order/LatticeElements): distributive, standard and neutral elements of a lattice Defines distributive, standard and neutral elements of a lattice and gives equivalent conditions. --- - [ ] depends on: #26836 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict 287/0 Mathlib.lean,Mathlib/Order/Lattice.lean,Mathlib/Order/LatticeElements.lean,docs/references.bib 4 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
14-26478
14 days ago
14-26479
14 days ago
0-1136
18 minutes
29281 plp127
author:plp127
docs: `Fin.natAdd_castLEEmb` Change the docstring of `Fin.natAdd_castLEEmb` which confused me when I read it so I rewrote it. PS. this doesn't really follow the naming convention since data should be in `camelCase` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 2/3 Mathlib/Data/Fin/Embedding.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
12-51590
12 days ago
12-51591
12 days ago
18-38918
18 days
27972 smmercuri
author:smmercuri
refactor: make `Valuation.Completion` a `def` and refactor more of `AdicValuation.lean` This PR continues the work from #24590. Original PR: https://github.com/leanprover-community/mathlib4/pull/24590 t-algebra t-number-theory merge-conflict WIP
label:t-algebra$
186/93 Mathlib/NumberTheory/NumberField/FinitePlaces.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 5 7 ['github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot', 'smmercuri'] nobody
12-14907
12 days ago
12-14908
12 days ago
3-83441
3 days
28908 joelriou
author:joelriou
feat(CategoryTheory): Pullback functors on `Over` categories in `Type` have right adjoints Given a map `f : E → B`, in order to show that `Over.pullback f : Over B ⥤ Over E` commutes with colimits, we show that it admits a right adjoint. In order to do that, we first construct a functor `overPullback f : Over B ⥤ Over E` whose definition involves explicit types rather than categorical pullbacks, and we define its right adjoint `overPushforward f : Over E ⥤ Over B`. (In a future PR, it will be shown that the `Over.pullback` also commutes with colimits in categories of presheaves, and hopefully this will be used in the construction of the Quillen model category structure on simplicial sets.) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict awaiting-author 103/0 Mathlib.lean,Mathlib/CategoryTheory/Limits/Types/OverPullback.lean,Mathlib/CategoryTheory/Limits/Types/Shapes.lean 3 10 ['emilyriehl', 'github-actions', 'joelriou', 'mathlib4-merge-conflict-bot', 'robin-carlier', 'sinhp'] nobody
11-30583
11 days ago
11-30583
11 days ago
13-55990
13 days
25480 ocfnash
author:ocfnash
feat: define a concrete model of the `𝔤₂` root system This is a bit of an experiment to test API but it should also make it easier to prove some properties of `𝔤₂`. --- - [x] depends on: #25477 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra merge-conflict WIP
label:t-algebra$
120/15 Mathlib/LinearAlgebra/RootSystem/Defs.lean,Mathlib/LinearAlgebra/RootSystem/Finite/G2.lean,Mathlib/LinearAlgebra/RootSystem/Reduced.lean 3 9 ['eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'ocfnash'] nobody
9-72783
9 days ago
9-72784
9 days ago
0-1
1 second
29330 plp127
author:plp127
chore: define `Fin.cycleIcc` with conditions Redefine `Fin.cycleIcc` using conditionals instead of composing existing `Fin` operations together. Its worst-case runtime drops from O(n) to O(1). As a bonus, the definition no longer needs explaining. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory merge-conflict 61/68 Mathlib/GroupTheory/Perm/Fin.lean 1 10 ['JovanGerb', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'tb65536'] nobody
9-70894
9 days ago
9-70895
9 days ago
20-39203
20 days
29430 RemyDegenne
author:RemyDegenne
refactor(Probability): change stopping times to take values in `WithTop` This PR changes stopping times to have type `Ω → WithTop ι` instead of `Ω → ι`. Previously, a stopping time for a filtration indexed by Nat had to have value in Nat. That's not representative of the way stopping times are used in probability. A typical stopping time is the first time at which we see a head in an infinite sequence of coin flips. That time could be infinite (although it is almost surely finite). We can't represent it with a `Ω → Nat` stopping time: if we choose an arbitrary value in Nat for the event that it is infinite, we destroy the stopping time property. We faced that issue in the `BorelCantelli` file, in which we avoided such a possibly infinite stopping time by introducing a sequence of bounded stopping times. We had to prove additional lemmas about them since we could not directly use the API for stopped processes. With the new type, that file is greatly simplified as the API is directly usable, and we can write the proof as we would on paper. The issue with the previous stopping time implementation was noted in [Ying and Degenne, A Formalization of Doob’s Martingale Convergence Theorems in mathlib, CPP 2023, https://dl.acm.org/doi/pdf/10.1145/3573105.3575675]. Other changes: - the sigma-algebra generated by a stopping time is now a sub-sigma algebra by definition - `measurableSet_eq_stopping_time` is generalized and the now useless `measurableSet_eq_stopping_time_of_countable` is removed - `hitting` is renamed to `hittingBtwn` - a new `hittingAfter` is introduced and used in the Borel-Cantelli proof. That proof is now much simpler since we can use a stopped process as intended instead of going around the limitations of the previous stopping time implementation. --- - [ ] depends on: #29466 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability merge-conflict WIP 1090/556 Mathlib/Probability/Martingale/Basic.lean,Mathlib/Probability/Martingale/BorelCantelli.lean,Mathlib/Probability/Martingale/OptionalSampling.lean,Mathlib/Probability/Martingale/OptionalStopping.lean,Mathlib/Probability/Martingale/Upcrossing.lean,Mathlib/Probability/Process/HittingTime.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/Topology/Order/WithTop.lean 8 11 ['RemyDegenne', 'github-actions', 'kex-y', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
9-70892
9 days ago
9-70893
9 days ago
0-1
1 second
29829 vihdzp
author:vihdzp
draft: more stuff on `standardPart` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 549/10 Mathlib.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/Archimedean/Hom.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Ring/Archimedean.lean,Mathlib/Data/Real/StandardPart.lean,Mathlib/Order/Quotient.lean 7 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
9-67334
9 days ago
9-67335
9 days ago
0-0
0 seconds
29118 edegeltje
author:edegeltje
chore(CategoryTheory): align `refl` and `rfl` declarations in CategoryTheory In general, theorems and declarations named `refl` take an explicit argument and prove/construct something of type `r X X`, whereas the `rfl` versions take the argument implicitly. This PR adds missing `rfl` declarations to the CategoryTheory library, and makes sure `Equivalence.refl` takes an explicit argument. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) will-close-soon t-category-theory merge-conflict awaiting-author 37/18 Mathlib/CategoryTheory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Enriched/Ordinary/Basic.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/IsConnected.lean,Mathlib/CategoryTheory/Iso.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Retract.lean,Mathlib/CategoryTheory/Shift/Adjunction.lean,Mathlib/CategoryTheory/Sums/Products.lean,Mathlib/CategoryTheory/Triangulated/Adjunction.lean,Mathlib/RingTheory/Morita/Basic.lean 11 7 ['Ruben-VandeVelde', 'edegeltje', 'github-actions', 'joelriou', 'mathlib4-merge-conflict-bot'] TwoFX
assignee:TwoFX
8-81276
8 days ago
8-81277
8 days ago
11-13051
11 days
29482 mattrobball
author:mattrobball
refactor (Algebra.Group.Defs): add npow/zpow/nsmul/zsmul as fields of new parents classes Adds ZPow G class and makes this a parent to DivInvMonoid and the corresponding additive versions. Updates zpow/zsmul operations to use the integrated power/scalar multiplication syntax. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
177/122 Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/Commute/Defs.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Int/Defs.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Ring/Unbundled/Basic.lean,Mathlib/Algebra/Ring/ULift.lean,Mathlib/Data/BitVec.lean,Mathlib/Tactic/Abel.lean,Mathlib/Tactic/NormNum/Pow.lean 21 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
8-81152
8 days ago
8-81153
8 days ago
0-0
0 seconds
29657 jcreinhold
author:jcreinhold
feat(CategoryTheory/MarkovCategory): add Markov categories This PR adds Markov categories to the category theory library. A Markov category is a symmetric monoidal category where every object has canonical copy and delete morphisms that form commutative comonoids. ## What this gives mathlib In a Markov category, morphisms model probabilistic processes. The copy morphism `X → X ⊗ X` creates perfect correlation (both outputs always equal). The delete morphism `X → I` marginalizes (sums/integrates out variables). This structure captures probability theory categorically. The same theorem proves results for: - Finite probability (stochastic matrices) - Measure theory (Markov kernels) - Kleisli categories of probability monads Fritz (2020) used this to prove categorical versions of Fisher-Neyman, Basu's theorem, and other core statistics results. ## Implementation - `MarkovCategory`: Extends `SymmetricCategory` with canonical comonoid structure - `copyMor X : X ⟶ X ⊗ X` and `delMor X : X ⟶ I` for each object - Coherence axioms: commutativity, counitality, coassociativity - Compatibility with tensor products Key design point: The comonoid structure is canonical (fields of the typeclass), not chosen. This matches the probability interpretation where there's exactly one way to copy/marginalize. ## Examples included 1. Cartesian categories: Every cartesian monoidal category forms a Markov category where copy is the diagonal `x ↦ (x,x)` and delete is the terminal morphism. All morphisms are deterministic. 2. FinStoch: Objects are finite types. Morphisms are stochastic matrices (rows sum to 1). This models finite probability spaces with the usual matrix multiplication for composition. ## Scope and review notes This PR provides the basic structure only. Future PRs would add: - Conditional independence - Sufficient statistics - Connection to measure-theoretic probability - More examples (Kleisli categories, Gaussian categories) I'm neither an expert in this material nor in Lean; I've only read a few papers on Markov categories and have gone through tutorial material in Lean. Please review for mathematical correctness and idiomatic Lean. I kept this PR small to check if mathlib wants this addition and to ensure it meets repository standards. ## Why add this now Markov categories provide a useful abstraction level for probability in type theory. Adding it to mathlib enables future work on categorical probability and statistics. In particular, I'm working on a probabilistic programming library and would like to write some proofs using these constructs. ## References - Fritz, T. (2020). [A synthetic approach to Markov kernels, conditional independence and theorems on sufficient statistics](https://arxiv.org/abs/1908.07021). *Advances in Mathematics*, 370, 107239. - Cho, K., & Jacobs, B. (2019). [Disintegration and Bayesian inversion via string diagrams](https://arxiv.org/abs/1709.00322). *Mathematical Structures in Computer Science*, 29(7), 938-971. --- All definitions include docstrings. The PR has tests for the core functionality. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory merge-conflict awaiting-author 2414/7 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Monad/Basic.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Basic.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Deterministic.lean,Mathlib/CategoryTheory/MarkovCategory/Basic.lean,Mathlib/CategoryTheory/MarkovCategory/Cartesian.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Basic.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Braided.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/CopyDiscard.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Markov.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Bimon_.lean,Mathlib/CategoryTheory/Monoidal/CommComon_.lean,Mathlib/CategoryTheory/Monoidal/Comon_.lean,MathlibTest/CategoryTheory/MarkovCategory.lean,docs/references.bib 16 28 ['github-actions', 'jcreinhold', 'joelriou', 'mathlib4-merge-conflict-bot'] nobody
8-47084
8 days ago
8-47085
8 days ago
0-0
0 seconds
29390 harahu
author:harahu
doc(Computability): documentation improvement suggestions from Junie Pro (LLM) I'm still in the process of self-reviewing the details here, but please shout out if there are any changes you don't like. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability merge-conflict 235/237 .gitignore,Mathlib/Computability/Ackermann.lean,Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Computability/AkraBazzi/GrowsPolynomially.lean,Mathlib/Computability/AkraBazzi/SumTransform.lean,Mathlib/Computability/ContextFreeGrammar.lean,Mathlib/Computability/DFA.lean,Mathlib/Computability/Encoding.lean,Mathlib/Computability/EpsilonNFA.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/MyhillNerode.lean,Mathlib/Computability/NFA.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/PostTuringMachine.lean,Mathlib/Computability/RegularExpressions.lean,Mathlib/Computability/TMComputable.lean,Mathlib/Computability/TMConfig.lean,Mathlib/Computability/TMToPartrec.lean,Mathlib/Computability/Tape.lean,Mathlib/Computability/TuringDegree.lean,Mathlib/Computability/TuringMachine.lean 22 9 ['github-actions', 'harahu', 'mathlib4-merge-conflict-bot'] nobody
8-1289
8 days ago
8-1290
8 days ago
0-0
0 seconds
21847 smmercuri
author:smmercuri
feat: `v.adicCompletionIntegers K` is compact --- - [x] depends on: #21844 - [x] depends on: #24872 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-number-theory merge-conflict WIP 459/4 Mathlib.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/NumberTheory/NumberField/AdeleRing.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Algebra/UniformRing.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/WithZeroMulInt.lean 11 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
7-63681
7 days ago
59-58722
1 month ago
0-0
0 seconds
27829 dupuisf
author:dupuisf
feat: modify `cfc_tac` to use `grind` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 60/50 Mathlib/Algebra/Order/Star/Basic.lean,Mathlib/Algebra/Star/SelfAdjoint.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Integral.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/NonUnital.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/PosPart/Basic.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Basic.lean,Mathlib/Tactic/ContinuousFunctionalCalculus.lean 9 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
7-48995
7 days ago
7-48996
7 days ago
0-1
1 second
21950 erdOne
author:erdOne
feat(NumberTheory/Padics): the completion of `ℚ` at a finite place is `ℚ_[p]` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory merge-conflict 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
7-46004
7 days ago
88-45941
2 months ago
79-1228
79 days
27668 IvanRenison
author:IvanRenison
feat(Analysis/InnerProductSpace): define outer product of linear maps Co-authored-by: Jam Kabeer Ali Khan --- I'm not completely sure if this is a good addition or not, and also, I was not sure if to call the definition `outerProduct` or only `outer`. - [ ] depends on: #28350 - [ ] depends on: #28344 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict 205/8 Mathlib.lean,Mathlib/Algebra/Module/LinearMap/Lemmas.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/InnerProductSpace/LinearMap.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/Positive.lean,Mathlib/Analysis/InnerProductSpace/Trace.lean,Mathlib/LinearAlgebra/Dual/Lemmas.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean 10 70 ['IvanRenison', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'themathqueen'] themathqueen
assignee:themathqueen
6-47834
6 days ago
6-47835
6 days ago
2-57966
2 days
12278 Rida-Hamadani
author:Rida-Hamadani
feat(Combinatorics/SimpleGraph): Provide iff statements for distance equal and greater than 2 I need these lemmas to prove that Moore graphs of girth 5 are strongly regular. --- - [x] depends on: #11945 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics merge-conflict awaiting-author 76/0 Mathlib/Combinatorics/SimpleGraph/Metric.lean 1 3 ['github-actions', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] nobody
5-47966
5 days ago
5-47967
5 days ago
1-68738
1 day
27353 themathqueen
author:themathqueen
chore(LinearAlgebra/TensorProduct/Basic): more semi-linearizing Co-authored-by: @ADedecker --- This continues the work from: #27310 (original PR: #24208). - [x] depends on: #27467 - [x] depends on: #27288 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
230/187 Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Closed.lean,Mathlib/Algebra/Lie/TensorProduct.lean,Mathlib/CategoryTheory/Monoidal/Internal/Module.lean,Mathlib/LinearAlgebra/BilinearForm/TensorProduct.lean,Mathlib/LinearAlgebra/Coevaluation.lean,Mathlib/LinearAlgebra/Contraction.lean,Mathlib/LinearAlgebra/DirectSum/TensorProduct.lean,Mathlib/LinearAlgebra/Dual/Lemmas.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean,Mathlib/LinearAlgebra/Trace.lean,Mathlib/RepresentationTheory/Rep.lean,Mathlib/RingTheory/Coalgebra/Hom.lean 15 15 ['eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'themathqueen'] nobody
5-37981
5 days ago
5-39020
5 days ago
2-62342
2 days
28001 daefigueroa
author:daefigueroa
feat(Dynamics): add results on topologically transitive flows We define topological transitivity for a flow and show that a factor of a topologically transitive flow is topologically transitive. --- This contribution was created as part of the Utrecht Summerschool "Formalizing Mathematics in Lean" in July 2025. - [ ] depends on: #28000 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-dynamics merge-conflict 68/3 Mathlib.lean,Mathlib/Dynamics/Flow.lean,Mathlib/Dynamics/Transitive.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
5-19522
5 days ago
5-19523
5 days ago
0-4581
1 hour
29092 zhuyizheng
author:zhuyizheng
feat(MeasureTheory): add absolutely continuous functions, FTC and integration by parts Add the ε-δ definition of absolutely continuous functions on a closed interval in ℝ. Prove Fundamental Theorem of Calculus and integration by parts for absolutely continuous functions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability merge-conflict awaiting-author 1376/0 Mathlib.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/MeasureTheory/Function/AbsolutelyContinuous.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/AbsContFunc.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/DerivIntegrable.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/LebesgueDifferetiationThm.lean,Mathlib/Topology/EMetricSpace/BoundedVariation.lean 7 6 ['Ruben-VandeVelde', 'fpvandoorn', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
5-19152
5 days ago
5-19153
5 days ago
0-24361
6 hours
26300 igorkhavkine
author:igorkhavkine
feat(Analysis/Calculus/FDeriv): continuous differentiability from continuous partial derivatives on an open domain in a product space If a function `f : E × F → G` is continuously differentiable, then its partial derivatives along `E` and `F` are also continuous. The non-trivial converse implication holds when the partial derivatives are continuous on an open domain, and they can be added together to give the total derivative of `f`. See this [#mathlib4 > Partial derivatives @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Partial.20derivatives/near/520995477) and the containing thread for some discussion. The PR creates a new import (`Mathlib.Analysis.Calculus.FDeriv.Partial`), where other results about partial derivatives could go in the future. --- *this is the migration of #25304 to the PR-from-fork workflow* - [x] depends on: #25564 - [x] depends on: #26273 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis merge-conflict awaiting-author WIP 497/0 Mathlib.lean,Mathlib/Analysis/Calculus/FDeriv/Partial.lean,Mathlib/Analysis/Normed/Module/Convex.lean,Mathlib/Analysis/Normed/Operator/BoundedLinearMaps.lean 4 20 ['YaelDillies', 'agjftucker', 'github-actions', 'igorkhavkine', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] sgouezel
assignee:sgouezel
4-69799
4 days ago
4-69800
4 days ago
50-22679
50 days
19860 YaelDillies
author:YaelDillies
refactor: review the `simps` projections of `OneHom`, `MulHom`, `MonoidHom` Make `simps` generate `coe_concreteHom` rather than`concreteHom_apply`. From FLT --- In fact, I would love to have both the `coe_` and `_apply` projections simultaneously and also to not have to specify ` simps (config := .asFn))` every single time we want to generate the `coe_` projection, but `simps ` seems to not be able to do that? cc @fpvandoorn I must say, after four years of working on mathlib, I still don't understand how one is supposed to use `simps`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict WIP
label:t-algebra$
104/119 Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/WithOne/Basic.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/Algebra/Module/End.lean,Mathlib/GroupTheory/NoncommCoprod.lean 8 11 ['fpvandoorn', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
4-61463
4 days ago
4-61464
4 days ago
0-17
17 seconds
21035 mattrobball
author:mattrobball
draft --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
3/3 Mathlib/RingTheory/Kaehler/JacobiZariski.lean 1 5 ['github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot', 'mattrobball'] nobody
4-61462
4 days ago
4-61462
4 days ago
0-0
0 seconds
26178 ppls-nd-prs
author:ppls-nd-prs
feat(CategoryTheory/Limits): Fubini for products We show that the product of products is a product indexed by the sigma type. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory merge-conflict awaiting-author 17/0 Mathlib/CategoryTheory/Limits/Shapes/Products.lean 1 6 ['chrisflav', 'github-actions', 'leanprover-community-bot-assistant', 'ppls-nd-prs', 'robin-carlier'] nobody
4-61297
4 days ago
90-80403
2 months ago
0-47665
13 hours
30066 Vierkantor
author:Vierkantor
for benchmarking: No cancellation inheritance for concrete subobjects Remove Is[Left,Right]Cancel[Add,Mul][Zero,] instances that can be inferred automatically. This is intended mostly to be benchmarked, for comparison with #27992 which keeps these instances. Our hypothesis is that this commit will see performance regressions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict WIP
label:t-algebra$
47/27 Mathlib.lean,Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/Algebra/Group/Subsemigroup/Defs.lean,Mathlib/Algebra/GroupWithZero/Submonoid/CancelMulZero.lean,Mathlib/Algebra/Module/Submodule/Defs.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean 6 4 ['github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] nobody
4-55277
4 days ago
4-55277
4 days ago
0-0
0 seconds
27214 robin-carlier
author:robin-carlier
feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): Categorical pullback squares In this PR, we give the definition and first basic properties of categorical pullback squares. Using our previous work on `CategoricalPullback`, we define a typeclass `CatPullbackSquare T L R B` that asserts that a given `CatCommSq T L R B` is a "pullback square": this is the data of a chosen adjoint equivalence to the canonical functor from the top left corner of the square to the categorical pulback of its leg. Using this equivalence, be derive a universal property for functors from `X`with values in the top left corner of the square: they are equivalent to `CatCommSqOver R B X`, the category of categorical commutative squares over the cospan `R, B` with top left corner `X`. We prove some coherence result for this equivalence, most notably an isomorphism that, given `S : CatCommSqOver R B X`, bundles the two commutative triangles formed by the induced functor, and the coherence between the squares that these isomorphisms satisfy: this is conveniently bundled in the data of a single isomorphisms of `CatCommSqOver R B X`. Finally, we provide a `Prop`-class `IsCatPullbackSquare` that merely asserts the existence (via `Nonempty`) of the relevant data: we show that it is tautotogically equivalent to the propopsition that the canonical functor to the categorical pullback is an equivalence. --- - [ ] depends on: #26679 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict 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
4-36086
4 days ago
4-36087
4 days ago
0-5521
1 hour
28807 alreadydone
author:alreadydone
experiment: Submodule with SMul only (no Semiring) --- `SubMulAction` already takes `SMul`. TODO: relax typeclass requirements of `Ideal` as well. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) bench-after-CI t-algebra awaiting-CI merge-conflict
label:t-algebra$
54/42 Mathlib/Algebra/Module/Submodule/Defs.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
3-85520
3 days ago
3-85520
3 days ago
0-0
0 seconds
25930 loefflerd
author:loefflerd
WIP towards Hecke bound for q-expansions The aim of this PR is to prove various statements about boundedness properties of modular forms. --- - [x] depends on: #29640 This PR continues the work from #24962. migrated-from-branch large-import t-number-theory merge-conflict WIP 710/143 Mathlib.lean,Mathlib/NumberTheory/ModularForms/Bounds.lean,Mathlib/NumberTheory/ModularForms/CongruenceSubgroups.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/IsBoundedAtImInfty.lean,Mathlib/NumberTheory/ModularForms/Identities.lean,Mathlib/NumberTheory/ModularForms/LevelOne.lean,Mathlib/NumberTheory/ModularForms/Petersson.lean,Mathlib/NumberTheory/ModularForms/QExpansion.lean 8 9 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
3-63499
3 days ago
3-63500
3 days ago
0-77
1 minute
26466 robin-carlier
author:robin-carlier
feat(AlgebraicTopology/SimplexCategory/Augmented): the canonical monoid object in the augmented simplex category Show that in the augmented simplex category, `⦋0⦌` is an internal monoid object. Future work will show that this is in fact the universal monoid object: for any monoidal category `C`, evaluation at `⦋0⦌` induces an equivalence of categories between `Mon_ C` and the category of monoidal functors from `AugmentedSimplexCategory` to `C`. The resulting augmented cosimplicial object one gets from this construction is sometimes called the "monoidal bar construction" attached to a monoid. This PR was split from #25743. --- - [ ] depends on: #25743 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology t-category-theory merge-conflict 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
3-55488
3 days ago
3-55490
3 days ago
0-1708
28 minutes
28074 grunweg
author:grunweg
Isbilinearmap TODO see if it builds, move everything to the right place, add docs. update Pr description - written by Patrick, part of #26221 (and prereq for #28056) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 64/0 Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/LinearAlgebra/BilinearMap.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
3-21855
3 days ago
3-21856
3 days ago
0-2
2 seconds
26578 robin-carlier
author:robin-carlier
feat(CategoryTheory/Limits/Pullbacks/Categorical/CatCospanTransform): adjunctions of categorical cospans We build upon the bicategory-like structure developed in #26447 and #26412 to define the notion of adjunctions of categorical cospans. This is a structure encoding the data of two `CatCospanTransform`s, along with the usual unit and counit morphisms as part of the data, satisfying the usual left and right triangle identities. We provide basic API for these, such as extracting adjunctions between individual components. We also provide a proof that the notion satisfies a "coherence": with our chosen constructor, the forward direction of the structure `CatCommSq` on the left adjoints correspond to the inverse of the square for the right adjoints through `mateEquiv`. These adjunctions will be used as a substrate for defining equivalences of categorical cospans in a future PR: such an equivalence will be a structure extending a `CatCospanAdjunction` with isomorphisms data on the unit and co-unit (we will however provide alternative constructors in sync with the constructor for equivalences of categories). --- - [x] depends on: #26447 - [x] depends on: #26547 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory merge-conflict 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
2-58713
2 days ago
2-61685
2 days ago
0-625
10 minutes
27970 smmercuri
author:smmercuri
feat: collections of distinct infinite places contain values that diverge around 1 This PR continues the work from #22147. Original PR: https://github.com/leanprover-community/mathlib4/pull/22147 --- - [ ] depends on: #27969 FLT t-algebra t-number-theory merge-conflict WIP
label:t-algebra$
461/44 Mathlib/Algebra/Order/AbsoluteValue/Basic.lean,Mathlib/Analysis/AbsoluteValue/Equivalence.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Basic.lean,Mathlib/NumberTheory/Ostrowski.lean 4 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
2-56967
2 days ago
2-56970
2 days ago
0-2827
47 minutes
22089 sgouezel
author:sgouezel
feat: composing a continuous multilinear map with continuous linear maps is analytic in both variables Also prove that the composition of continuously polynomial functions is continuously polynomial. --- - [x] depends on: #22102 - [x] depends on: #22789 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict awaiting-author 277/80 Mathlib/Analysis/Analytic/CPolynomial.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/NormedSpace/Multilinear/Basic.lean,Mathlib/Data/Multiset/DershowitzManna.lean,Mathlib/Order/KrullDimension.lean 5 14 ['github-actions', 'grunweg', 'loefflerd', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel', 'urkud'] loefflerd
assignee:loefflerd
2-55710
2 days ago
2-73652
2 days ago
122-9676
122 days
28962 grunweg
author:grunweg
chore: enable the flexible linter in mathlib Let's see what has regressed in the mean-time, and how many exceptions remain. We're somewhat liberal with disabling the linter when this doesn't make sense: let's see how close we are. --- TODO: should the `bicategory` tactic be considered flexible/normalising? - [x] depends on: #29027 - [x] depends on: #29174 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 389/133 Archive/Arithcc.lean,Archive/Examples/Eisenstein.lean,Archive/Examples/IfNormalization/Result.lean,Archive/Imo/Imo1997Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q4.lean,Archive/Imo/Imo2019Q4.lean,Archive/Imo/Imo2024Q5.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Counterexamples/MapFloor.lean,Counterexamples/Phillips.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/Category/ModuleCat/Subobject.lean,Mathlib/Algebra/Field/GeomSum.lean,Mathlib/Algebra/FreeAlgebra.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Homology/Augment.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Lie/Weights/RootSystem.lean,Mathlib/Algebra/LinearRecurrence.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Formula.lean,Mathlib/AlgebraicGeometry/Gluing.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicGeometry/ValuativeCriterion.lean,Mathlib/AlgebraicTopology/SimplicialSet/HomotopyCat.lean,Mathlib/AlgebraicTopology/SimplicialSet/NerveAdjunction.lean,Mathlib/Analysis/AbsoluteValue/Equivalence.lean,Mathlib/Analysis/Analytic/Binomial.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/OfScalars.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Basic.lean,Mathlib/Analysis/CStarAlgebra/SpecialFunctions/PosPart.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Calculus/FDeriv/Pow.lean,Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean,Mathlib/Analysis/Calculus/LHopital.lean,Mathlib/Analysis/Complex/Arg.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Complex/ValueDistribution/FirstMainTheorem.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/FunctionalSpaces/SobolevInequality.lean,Mathlib/Analysis/InnerProductSpace/Rayleigh.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/Meromorphic/NormalForm.lean,Mathlib/Analysis/Meromorphic/TrailingCoefficient.lean,Mathlib/Analysis/NormedSpace/MultipliableUniformlyOn.lean,Mathlib/Analysis/ODE/Gronwall.lean,Mathlib/Analysis/Real/Pi/Irrational.lean,Mathlib/Analysis/SpecialFunctions/BinaryEntropy.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/PosPart/Basic.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/IntegralRepresentation.lean,Mathlib/Analysis/SpecialFunctions/Gaussian/FourierTransform.lean,Mathlib/Analysis/SpecialFunctions/Log/PosLog.lean,Mathlib/Analysis/SpecialFunctions/MulExpNegMulSq.lean,Mathlib/Analysis/SpecialFunctions/MulExpNegMulSqIntegral.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Arctan.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Complex.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Inverse.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/Mate.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Dialectica/Monoidal.lean,Mathlib/CategoryTheory/Galois/Basic.lean,Mathlib/CategoryTheory/Limits/Constructions/Equalizers.lean,Mathlib/CategoryTheory/Limits/Shapes/BinaryProducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Equalizers.lean,Mathlib/CategoryTheory/Limits/Shapes/Grothendieck.lean,Mathlib/CategoryTheory/Limits/Shapes/Products.lean,Mathlib/CategoryTheory/Limits/VanKampen.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Braided.lean,Mathlib/CategoryTheory/Products/Basic.lean,Mathlib/CategoryTheory/SmallObject/Construction.lean,Mathlib/Combinatorics/Additive/Corner/Roth.lean,Mathlib/Combinatorics/Additive/FreimanHom.lean,Mathlib/Combinatorics/Additive/SmallTripling.lean,Mathlib/Combinatorics/Additive/VerySmallDoubling.lean,Mathlib/Combinatorics/Enumerative/Composition.lean,Mathlib/Combinatorics/SetFamily/FourFunctions.lean,Mathlib/Combinatorics/SetFamily/KruskalKatona.lean,Mathlib/Combinatorics/SimpleGraph/ConcreteColorings.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Uniform.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/Primrec.lean,Mathlib/Computability/TMConfig.lean,Mathlib/Computability/TMToPartrec.lean,Mathlib/Control/EquivFunctor/Instances.lean,Mathlib/Data/Bool/Count.lean,Mathlib/Data/ENNReal/BigOperators.lean 168 19 ['github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
2-43501
2 days ago
2-43502
2 days ago
3-66115
3 days
30081 adomani
author:adomani
test: remove deprecated declarations in Archive and Counterexamples Checks that the latest modifications in #30070 still work and allow the removal of deprecated declarations in `Archive` and `Counterexamples`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) test-ci merge-conflict 667/0 .github/workflows/remove_deprecated_decls.yml,Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/CommandRanges.lean,Mathlib/Tactic/Linter/FindDeprecations.lean,MathlibTest/FindDeprecations.lean,scripts/README.md,scripts/remove_deprecated_decls_CI.sh 8 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
2-42582
2 days ago
2-42583
2 days ago
0-0
0 seconds
27882 euprunin
author:euprunin
chore: golf using `grind [Nat.cast_*]` merge-conflict 6/18 Mathlib/Analysis/SpecialFunctions/Trigonometric/Cotangent.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/EulerSineProd.lean,Mathlib/GroupTheory/CommutingProbability.lean,Mathlib/RingTheory/ZMod/UnitsCyclic.lean 4 12 ['github-actions', 'kim-em', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] urkud
assignee:urkud
1-64737
1 day ago
1-64738
1 day ago
60-4294
60 days
25042 alreadydone
author:alreadydone
feat(Topology): restriction/extension of Trivialization and composition with Homeomorph --- - [x] depends on: #25041 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 148/2 Mathlib/Topology/FiberBundle/Trivialization.lean,Mathlib/Topology/Maps/Basic.lean 2 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] ADedecker
assignee:ADedecker
1-61157
1 day ago
1-61158
1 day ago
134-68375
134 days
26115 grunweg
author:grunweg
WIP/proof of concept,feat: the inverse function theorem for manifolds --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict WIP 348/0 Mathlib.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Geometry/Manifold/InverseFunctionTheorem.lean,Mathlib/Topology/PartialHomeomorph.lean 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
1-60600
1 day ago
1-60601
1 day ago
0-0
0 seconds
28243 robin-carlier
author:robin-carlier
chore(CategoryTheory/Bicategory): move some `eqToHom` lemmas The file `CategoryTheory/Bicategory/EqToHom.lean` introduced in #28242 is a more suitable hom for the lemmas `CategoryTheory.Bicategory.whiskerLeft_eqToHom` and `CategoryTheory.Bicategory.eqToHom_whiskerRight` than the current `CategoryTheory/Bicategory/Strict.lean`. We move these lemmas to the new file, and make `CategoryTheory/Bicategory/Strict` import these lemmas. --- - [ ] depends on: #28242 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict 165/23 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/EqToHom.lean,Mathlib/CategoryTheory/Bicategory/Strict.lean,Mathlib/CategoryTheory/EqToHom.lean,scripts/noshake.json 5 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'robin-carlier'] nobody
1-27226
1 day ago
1-27227
1 day ago
0-9063
2 hours
29012 grunweg
author:grunweg
chore: reduce `Topology` imports in `Data` Move Data.Real.Sqrt to Analysis. --- - [ ] depends on: #28966 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed merge-conflict 25/21 Archive/Imo/Imo1959Q2.lean,Archive/Imo/Imo1960Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2008Q4.lean,Archive/Sensitivity.lean,Mathlib.lean,Mathlib/Algebra/Star/CHSH.lean,Mathlib/Analysis/Complex/Norm.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Normed/Module/Ball/Homeomorph.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/Real/Sqrt.lean,Mathlib/Data/Rat/NatSqrt/Real.lean,Mathlib/Data/Real/CompleteField.lean,Mathlib/Data/Real/Irrational.lean,Mathlib/Data/Real/StarOrdered.lean,Mathlib/NumberTheory/Zsqrtd/ToReal.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Tactic/NormNum/RealSqrt.lean,MathlibTest/positivity.lean 20 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-54026
15 hours ago
0-54027
15 hours ago
6-26396
6 days
26601 yuma-mizuno
author:yuma-mizuno
feat(CategoryTheory): make `Functor.comp` irreducible [#mathlib4 > Functor identity `𝟭 _ ⋙ F = F` is definitional equality](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Functor.20identity.20.60.F0.9D.9F.AD.20_.20.E2.8B.99.20F.20.3D.20F.60.20is.20definitional.20equality/with/523978659) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict WIP 514/261 Mathlib/AlgebraicTopology/DoldKan/Compatibility.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/CategoryTheory/Adjunction/Basic.lean,Mathlib/CategoryTheory/CatCommSq.lean,Mathlib/CategoryTheory/Category/Cat.lean,Mathlib/CategoryTheory/Category/RelCat.lean,Mathlib/CategoryTheory/Category/ULift.lean,Mathlib/CategoryTheory/Core.lean,Mathlib/CategoryTheory/Discrete/Basic.lean,Mathlib/CategoryTheory/EqToHom.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/Functor/Basic.lean,Mathlib/CategoryTheory/Functor/Category.lean,Mathlib/CategoryTheory/Functor/Const.lean,Mathlib/CategoryTheory/Functor/Currying.lean,Mathlib/CategoryTheory/Functor/CurryingThree.lean,Mathlib/CategoryTheory/Functor/FullyFaithful.lean,Mathlib/CategoryTheory/Functor/Functorial.lean,Mathlib/CategoryTheory/Functor/ReflectsIso/Basic.lean,Mathlib/CategoryTheory/Functor/TwoSquare.lean,Mathlib/CategoryTheory/Groupoid/FreeGroupoid.lean,Mathlib/CategoryTheory/Join/Basic.lean,Mathlib/CategoryTheory/Limits/Cones.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/ObjectProperty/FullSubcategory.lean,Mathlib/CategoryTheory/Opposites.lean,Mathlib/CategoryTheory/PathCategory/Basic.lean,Mathlib/CategoryTheory/Pi/Basic.lean,Mathlib/CategoryTheory/Products/Associator.lean,Mathlib/CategoryTheory/Products/Basic.lean,Mathlib/CategoryTheory/Quotient.lean,Mathlib/CategoryTheory/Sigma/Basic.lean,Mathlib/CategoryTheory/Whiskering.lean,Mathlib/CategoryTheory/Yoneda.lean 34 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
0-41827
11 hours ago
0-41828
11 hours ago
0-10
10 seconds
29136 YaelDillies
author:YaelDillies
feat(CategoryTheory/Monoidal): `mapMon` of a lax-braided functor is lax-braided Also move the `BraidedCategory (Mon_ C)` instance earlier in the file to avoid splitting up the functor material. I think it makes more sense like this (defining `Mon_Class`, then `Mon_`, then `Functor.mapMon`). From Toric --- - [ ] depends on: #30157 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) toric t-category-theory merge-conflict 466/404 Mathlib/Algebra/Category/CoalgCat/ComonEquivalence.lean,Mathlib/CategoryTheory/Monoidal/Grp_.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean 3 12 ['YaelDillies', 'github-actions', 'joelriou', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] TwoFX
assignee:TwoFX
0-41126
11 hours ago
0-41127
11 hours ago
29-76830
29 days
29925 jcreinhold
author:jcreinhold
feat(CategoryTheory/MarkovCategory): Add Markov category This PR introduces Markov categories, extending copy-discard categories with natural discard to model categorical probability theory. This PR builds on #29939 and #29919 and was split up from #29657. ## Main additions ### 1. Markov categories (`MarkovCategory`) Extends `CopyDiscardCategory` where discard is natural: `f ≫ ε[Y] = ε[X]` for all morphisms `f : X → Y`. This forces a probabilistic interpretation where morphisms preserve normalization (probability measures sum to 1). ### 2. Cartesian categories as Markov categories Proves that every cartesian monoidal category forms a Markov category where: - Copy is the diagonal morphism `x ↦ (x, x)` - Discard is the unique morphism to terminal - All morphisms are deterministic (preserve copying perfectly) This shows cartesian categories model deterministic computation within the probability framework. ## Mathematical significance Markov categories capture probability theory categorically: - Morphisms: Stochastic processes/Markov kernels - Copy: Perfect correlation (both outputs always equal) - Discard: Marginalization (integrating out variables) - Natural discard: Preservation of total probability The same framework handles finite probability (stochastic matrices), measure-theoretic probability (Markov kernels), and quantum probability (completely positive maps). ## Design decisions - Terminal unit follows from axioms. We prove `unit_terminal` and `unit_isTerminal` rather than assuming them - Cartesian instance automation: The braiding, symmetric, copy-discard, and Markov instances for cartesian categories work automatically via type class inference ## Implementation notes - Built on top of `CopyDiscardCategory` per suggestion [#mathlib4 > Markov categories PR @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Markov.20categories.20PR/near/539656225) - Includes both computational (`unit_terminal`) and categorical (`unit_isTerminal`) characterizations of the terminal object ## References Cho & Jacobs (2019) and Fritz (2020) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #29939 new-contributor t-category-theory merge-conflict 476/0 Mathlib.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Basic.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Cartesian.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Deterministic.lean,Mathlib/CategoryTheory/MarkovCategory/Basic.lean,Mathlib/CategoryTheory/MarkovCategory/Cartesian.lean,MathlibTest/CategoryTheory/MarkovCategory.lean,docs/references.bib 8 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-28440
7 hours ago
0-28441
7 hours ago
0-0
0 seconds
13158 erdOne
author:erdOne
refactor(RingTheory/OreLocalization/Module): remove `LocalizedModule.mk`. --- - [x] depends on: #13151 - [ ] depends on: #13156 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
49/48 Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/OreLocalization/Module.lean 2 1 ['leanprover-community-mathlib4-bot'] nobody
451-49107
1 year ago
451-49130
1 year ago
0-0
0 seconds
14889 yuma-mizuno
author:yuma-mizuno
feat(CategoryTheory/Bicategory/Monad): define monad in bicategory --- - [ ] depends on: #12107 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict blocked-by-other-PR WIP 1566/12 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Functor/Oplax.lean,Mathlib/CategoryTheory/Bicategory/LocallyDiscrete.lean,Mathlib/CategoryTheory/Bicategory/Monad/Adjunction.lean,Mathlib/CategoryTheory/Bicategory/Monad/Basic.lean,Mathlib/CategoryTheory/Bicategory/Monad/Cat.lean,Mathlib/CategoryTheory/Monad/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Coherence.lean,Mathlib/Tactic/Widget/StringDiagram.lean,scripts/noshake.json,test/StringDiagram.lean,widget/src/penrose/monoidal.dsl,widget/src/penrose/monoidal.sty 14 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
429-68433
1 year ago
441-79671
1 year ago
0-0
0 seconds
12879 grunweg
author:grunweg
feat: port ge_or_gt linter from mathlib3 Code works and is essentially green: next step is to split up into separate PRs. Feedback welcome on whether: - all the test changes are good, or I should simply allow it in more cases - if calc blocks need to be explicitly exempt --- - [ ] depends on: #12933 - [ ] depends on: #12934 - [ ] depends on: #12931 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt t-linter merge-conflict 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 3 ['github-actions', 'grunweg', 'leanprover-community-mathlib4-bot'] nobody
429-68430
1 year ago
451-49130
1 year ago
0-15202
4 hours
13057 alreadydone
author:alreadydone
feat(NumberTheory): characterize elliptic divisibility sequences Main results: + Every `normEDS` is an elliptic divisibility sequence (EDS). The key proof is `rel₄_of_anti_oddRec_evenRec`, based on my original argument first published on [MathSE](https://math.stackexchange.com/a/4903422/12932) + Conversely, every EDS is equal to some `normEDS` (assuming that the first two terms are not zero divisors) --- - [ ] depends on: #13155 - [x] depends on: #13153 - [x] depends on: #10843 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-number-theory merge-conflict blocked-by-other-PR
label:t-algebra$
1032/55 Mathlib/Algebra/Ring/NegOnePow.lean,Mathlib/Data/Int/Defs.lean,Mathlib/Data/Int/Parity.lean,Mathlib/GroupTheory/Perm/Sign.lean,Mathlib/NumberTheory/EllipticDivisibilitySequence.lean 5 6 ['Multramate', 'alreadydone', 'kbuzzard', 'leanprover-community-mathlib4-bot'] nobody
429-68430
1 year ago
480-23418
1 year ago
0-34665
9 hours
10842 mcdoll
author:mcdoll
chore: simplify proofs using new positivity extensions and tests --- - [x] depends on: #10661 - [ ] depends on: #10796 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR WIP 98/50 Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/SpecialFunctions/Gaussian.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL1.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Real.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Unique.lean,Mathlib/MeasureTheory/Function/ContinuousMapDense.lean,Mathlib/MeasureTheory/Integral/Bochner.lean,Mathlib/MeasureTheory/Measure/Tilted.lean,Mathlib/Probability/Martingale/Upcrossing.lean,Mathlib/Probability/Moments.lean,Mathlib/Probability/Variance.lean,Mathlib/Tactic/Positivity/Core.lean,test/positivity.lean 14 1 ['leanprover-community-mathlib4-bot'] nobody
429-68428
1 year ago
493-71649
1 year ago
0-0
0 seconds
7564 shuxuezhuyi
author:shuxuezhuyi
feat(Topology/Algebra/Order): extend strictly monotone function on `Ioo` to homeomorphism on `Icc` A strictly monotone function between open intervals can be extended to a homeomorphism between the closed intervals. --- - [ ] depends on: #7351 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict blocked-by-other-PR 162/0 Mathlib.lean,Mathlib/Topology/Algebra/Order/IccExtendFromIoo.lean 2 1 ['leanprover-community-mathlib4-bot'] nobody
429-68426
1 year ago
451-49130
1 year ago
0-0
0 seconds
8364 thorimur
author:thorimur
feat: `refine?` This PR adds `refine? e`, which suggests replacing unsynthesized `_`'s in `e` with `?_` in order to make `refine e'` work: ```lean example : Nat → Nat := by refine? fun (_ : _) => _ -- Try this: refine fun (_ : _) => ?_ ``` Note that this only suggests replacements for `_`'s present in the syntax; to create goals for implicit or instance arguments, the user is expected to use `refine'`. --- I'm especially open to suggestions on the filename (currently `RefineFix`). I'm also curious if this behaves as expected! Feel free to try it out "in real life" and comment here on edge cases. - [ ] depends on: #8503 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict blocked-by-other-PR 684/5 Mathlib.lean,Mathlib/Lean/CoreM.lean,Mathlib/Lean/Elab/Tactic/ElabTerm.lean,Mathlib/Lean/Elab/Term.lean,Mathlib/Tactic.lean,Mathlib/Tactic/RefineFix.lean,Mathlib/Util/Delaborators.lean,Mathlib/Util/Syntax.lean,test/RefineFix.lean 9 5 ['j-loreaux', 'leanprover-community-mathlib4-bot', 'thorimur'] nobody
429-68426
1 year ago
451-49130
1 year ago
6-59794
6 days
7512 Komyyy
author:Komyyy
perf: override the data structures of coinductive types The data structures of the model of coinductive types (`Stream'`, `Computation`, `Stream'.Seq`) are inefficient, so we override their data structures. --- - [x] depends on: #7514 - [ ] depends on: leanprover/lean4#2292 - [x] depends on: leanprover/std4#371 - [x] depends on: #8460 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict blocked-by-core-PR blocked-by-other-PR WIP 6919/3700 Mathlib.lean,Mathlib/Algebra/ContinuedFractions/Basic.lean,Mathlib/Algebra/ContinuedFractions/Computation/ApproximationCorollaries.lean,Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/ContinuedFractions/Computation/Basic.lean,Mathlib/Algebra/ContinuedFractions/Computation/CorrectnessTerminating.lean,Mathlib/Algebra/ContinuedFractions/Computation/TerminatesIffRat.lean,Mathlib/Algebra/ContinuedFractions/Computation/Translations.lean,Mathlib/Algebra/ContinuedFractions/ContinuantRecurrence.lean,Mathlib/Algebra/ContinuedFractions/EvalEquiv.lean,Mathlib/Algebra/ContinuedFractions/Real.lean,Mathlib/Algebra/ContinuedFractions/TerminatedStable.lean,Mathlib/Algebra/ContinuedFractions/Translations.lean,Mathlib/Combinatorics/Hindman.lean,Mathlib/Control/Fix.lean,Mathlib/Control/LawfulFix.lean,Mathlib/Data/Seq/Computation.lean,Mathlib/Data/Seq/Parallel.lean,Mathlib/Data/Seq/Seq.lean,Mathlib/Data/Seq/WSeq.lean,Mathlib/Data/Stream.lean,lean-toolchain 22 2 ['digama0', 'leanprover-community-mathlib4-bot'] nobody
429-68426
1 year ago
491-46067
1 year ago
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 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict blocked-by-other-PR 491/1 Mathlib.lean,Mathlib/Lean/Meta/AppBuilder.lean,Mathlib/Lean/Meta/Basic.lean,Mathlib/Lean/Meta/ExprWithLevels.lean 4 1 ['kim-em'] nobody
429-68425
1 year ago
493-71649
1 year ago
0-0
0 seconds
13852 FR-vdash-bot
author:FR-vdash-bot
perf: skip some typeclasses in TC search --- - [ ] depends on: #7873 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) slow-typeclass-synthesis merge-conflict blocked-by-other-PR 45/33 Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/RingTheory/Norm.lean 3 21 ['FR-vdash-bot', 'MichaelStollBayreuth', 'github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] nobody
425-38414
1 year ago
425-38415
1 year ago
0-0
0 seconds
7565 shuxuezhuyi
author:shuxuezhuyi
feat(Topology/Algebra/Order): extend homeomorphism of `Ioo` to `Icc` We extend the homeomorphisms between open intervals to homeomorphisms between the closed intervals. --- - [ ] depends on: #7018 - [ ] depends on: #7351 - [ ] depends on: #7564 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order t-topology merge-conflict blocked-by-other-PR 389/5 Mathlib.lean,Mathlib/Data/Set/Intervals/Image.lean,Mathlib/Order/Directed.lean,Mathlib/Topology/Algebra/Order/IccExtendFromIoo.lean,Mathlib/Topology/Algebra/Order/IntermediateValue.lean 5 1 ['leanprover-community-mathlib4-bot'] nobody
415-62079
1 year ago
415-62079
1 year ago
0-0
0 seconds
11520 thorimur
author:thorimur
feat: `linting_rules` and deprecated syntax --- Experimental. WIP. Might not be performance-viable. - [ ] depends on: #11519 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict blocked-by-other-PR 1016/0 Mathlib.lean,Mathlib/Command/Linter.lean,Mathlib/Command/Linter/Deprecated.lean,Mathlib/Command/Linter/LintingRules.lean,Mathlib/Command/SyntaxRules.lean,Mathlib/Command/SyntaxRules/Attr.lean,Mathlib/Command/SyntaxRules/Elab.lean,Mathlib/Command/SyntaxRules/Header.lean,Mathlib/Command/SyntaxRules/Util.lean,Mathlib/Tactic/Common.lean,scripts/noshake.json 11 11 ['leanprover-bot', 'leanprover-community-mathlib4-bot', 'thorimur'] nobody
414-58284
1 year ago
414-58284
1 year ago
0-0
0 seconds
9154 FR-vdash-bot
author:FR-vdash-bot
feat: `npow` / `nsmul` / `Nat.cast`/ `zpow` / `zsmul` implemented using `Nat.binaryRec` --- - [ ] depends on: https://github.com/leanprover/lean4/pull/3756 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author 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 ['FR-vdash-bot', 'eric-wieser', 'kim-em', 'leanprover-community-mathlib4-bot'] nobody
414-57757
1 year ago
414-57757
1 year ago
0-0
0 seconds
7026 mo271
author:mo271
feat: toMonoidHom_coe - [ ] depends on: #6791 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory merge-conflict blocked-by-other-PR 16/0 Mathlib/NumberTheory/LegendreSymbol/MulCharacter.lean 1 3 ['leanprover-community-mathlib4-bot', 'mo271'] nobody
414-57720
1 year ago
414-57720
1 year ago
0-0
0 seconds
7861 shuxuezhuyi
author:shuxuezhuyi
feat(Geometry/Hyperbolic/UpperHalfPlane): instance IsometricSMul PSL(2, ℝ) ℍ --- - [ ] depends on: #7835 - [ ] depends on: #7791 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry merge-conflict blocked-by-other-PR 98/0 Mathlib.lean,Mathlib/Geometry/Hyperbolic/UpperHalfPlane/Basic.lean,Mathlib/LinearAlgebra/Matrix/ProjectiveSpecialLinearGroup.lean 3 1 ['leanprover-community-mathlib4-bot'] nobody
389-67756
1 year ago
389-67756
1 year ago
0-0
0 seconds
12087 JADekker
author:JADekker
feat : complete API for K-Lindelöf spaces --- - [ ] depends on: #11800 (which is now awaiting a design decision) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict please-adopt blocked-by-other-PR 789/17 Mathlib.lean,Mathlib/Order/Filter/CardinalInter.lean,Mathlib/Topology/Compactness/KLindelof.lean,Mathlib/Topology/Compactness/Lindelof.lean 4 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
382-80340
1 year ago
382-80340
1 year ago
1-72084
1 day
13782 alreadydone
author:alreadydone
feat(EllipticCurve): ZSMul formula in terms of division polynomials The formula $[n]P = (\phi_n(x,y) : \omega_n(x,y) : \psi_n(x,y))$ in Jacobian coordinates for $P=(x,y)$ a nonsingular point on a Weierstrass/elliptic curve. --- - [x] depends on: #12883 - [x] depends on: #13399 - [ ] depends on: #13057 - [ ] depends on: #13155 - [x] depends on: #13845 - [x] depends on: #13846 - [ ] depends on: #13847 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-algebraic-geometry t-number-theory merge-conflict blocked-by-other-PR
label:t-algebra$
2462/232 Mathlib.lean,Mathlib/Algebra/MvPolynomial/PDeriv.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/AlgebraicGeometry/EllipticCurve/DivisionPolynomial/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/DivisionPolynomial/ZSMul.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Universal.lean,Mathlib/NumberTheory/EllipticDivisibilitySequence.lean 10 n/a ['Multramate', 'alreadydone', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
377-11949
1 year ago
unknown
unknown
14242 js2357
author:js2357
feat: Prove equivalence of `isDedekindDomain` and `isDedekindDomainDvr` Prove that `isDedekindDomainDvr` is equivalent to both `isDedekindDomain` and `isDedekindDomainInv`. Specifically, prove `isDedekindDomainDvr A → isDedekindDomainInv A`, because `isDedekindDomain A → isDedekindDomainDvr A` and `IsDedekindDomain A ↔ IsDedekindDomainInv A` are already in Mathlib. - [x] depends on: #14099 - [x] depends on: #14216 - [ ] depends on: #14237 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
269/1 Mathlib.lean,Mathlib/RingTheory/DedekindDomain/Dvr.lean,Mathlib/RingTheory/FractionalIdeal/LocalizedAtPrime.lean,Mathlib/RingTheory/Localization/Basic.lean 4 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
374-31621
1 year ago
374-31621
1 year ago
0-0
0 seconds
16215 adomasbaliuka
author:adomasbaliuka
feat(Tactic/Linter): lint unwanted unicode Add a text-based style linter that checks all unicode characters. - Only allow whitelisted characters, with a suggestion to add the flagged character to the whitelist - Some characters are specified to use emoji-variant or text-variant. The linter ensures these variant-selectors only appear in the correct places and provides an auto-fix to clean them up. --- Discussed at [Zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Whitelist.20for.20Unicode.3F/near/448721083) The current proposal checks each character against a whitelist. There is also the question of what the whitelist should contain. A reasonable whitelist might be "all unicode currently in Mathlib" ∪ [Wikipedia/Mathematical_operators_and_symbols_in_Unicode](https://en.wikipedia.org/wiki/Mathematical_operators_and_symbols_in_Unicode) ∪ [EdAyers/mathlib3/docs/unicode.md](https://github.com/EdAyers/mathlib/blob/fb5c2ffe917049959597b0a93b872e91f4004922/docs/unicode.md). Currently implemented is a subset of this list closer to what's currently present in mathlib. - [x] depends on: #17068 - [x] depends on: #17116 - [ ] depends on: #17129 (part 1 of this PR) - [ ] depends on: #17131 (part 2 of this PR) - Future note: @adomasbaliuka says: "we might add something to the Mathlib 4 docs about this as well?" [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict blocked-by-other-PR 462/15 Mathlib/GroupTheory/GroupExtension/Defs.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Linter/UnicodeLinter.lean,Mathlib/Tactic/Widget/Calc.lean,Mathlib/Tactic/Widget/CongrM.lean,Mathlib/Tactic/Widget/Conv.lean,Mathlib/Tactic/Widget/GCongr.lean,Mathlib/Topology/ContinuousFunction/Weierstrass.lean,test/LintStyle.lean 9 51 ['adomasbaliuka', 'eric-wieser', 'github-actions', 'grunweg', 'joneugster', 'mathlib4-dependent-issues-bot'] nobody
368-86030
1 year ago
368-86030
1 year ago
12-19694
12 days
16888 metinersin
author:metinersin
feat(ModelTheory/Complexity): Define conjunctive and disjunctive normal forms Define `FirstOrder.Language.BoundedFormula.IsDNF` and `FirstOrder.Language.BoundedFormula.IsCNF`. --- - [ ] depends on: #16887 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-logic merge-conflict blocked-by-other-PR 415/7 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
366-27599
1 year ago
366-27599
1 year ago
0-1045
17 minutes
16887 metinersin
author:metinersin
feat(ModelTheory/Complexity): define conjunctive and disjunctive formulas Defines `FirstOrder.Language.BoundedFormula.IsConjunctive` and `FirstOrder.Language.BoundedFormula.IsDisjunctive`. --- - [ ] depends on: #16885 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-logic merge-conflict blocked-by-other-PR 300/7 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
366-27599
1 year ago
366-27600
1 year ago
0-1299
21 minutes
16889 metinersin
author:metinersin
feat(ModelTheory/Complexity): Normal forms Defines `FirstOrder.Language.BoundedFormula.toDNF` and `FirstOrder.Language.BoundedFormula.toCNF` - given a quantifier-free formula, these construct a semantically equivalent formula in disjunctive normal form and conjunctive normal form, respectively. --- - [ ] depends on: #16888 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-logic merge-conflict blocked-by-other-PR 525/7 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
366-27598
1 year ago
366-27598
1 year ago
0-613
10 minutes
13965 pechersky
author:pechersky
feat(Data/DigitExpansion): reals via digit expansion are complete --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #13964 t-data merge-conflict blocked-by-other-PR 3876/0 Mathlib.lean,Mathlib/Data/DigitExpansion/Add.lean,Mathlib/Data/DigitExpansion/Defs.lean,Mathlib/Data/DigitExpansion/Hensel.lean,Mathlib/Data/DigitExpansion/Integer/Basic.lean,Mathlib/Data/DigitExpansion/Integer/Mul.lean,Mathlib/Data/DigitExpansion/Real/Basic.lean,Mathlib/Data/DigitExpansion/Real/CompleteSpace.lean,Mathlib/Data/DigitExpansion/Real/ConditionallyComplete.lean,docs/references.bib 10 4 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
352-85740
11 months ago
352-85740
11 months ago
0-0
0 seconds
17519 grunweg
author:grunweg
feat: the `metrisableSpace` linter Similar to #10235, lint on occurrences of `MetricSpace` which should be `MetrisableSpace`. --- - [ ] depends on: #10235 (for all the details) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict blocked-by-other-PR 155/21 Mathlib.lean,Mathlib/Algebra/MvPolynomial/PDeriv.lean,Mathlib/AlgebraicGeometry/EllipticCurve/NormalForms.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/TuringMachine.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Data/MLList/Split.lean,Mathlib/GroupTheory/Perm/DomMulAct.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/MeasureTheory/Covering/VitaliFamily.lean,Mathlib/MeasureTheory/Measure/Doubling.lean,Mathlib/NumberTheory/JacobiSum/Basic.lean,Mathlib/Order/Heyting/Regular.lean,Mathlib/Tactic.lean,Mathlib/Tactic/FunProp/RefinedDiscrTree.lean,Mathlib/Tactic/Linter/UnusedAssumptionInType.lean,Mathlib/Util/Superscript.lean,scripts/noshake.json 19 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'urkud'] nobody
352-22254
11 months ago
361-22728
11 months ago*
361-22694
361 days*
12750 Command-Master
author:Command-Master
feat: define Gray code --- Define binary reflected gray code, both as a permutation of `Nat` and as a permutation of `BitVec n`, and prove some theorems about them. Additionally, remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`. - [ ] depends on: #12751 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor merge-conflict awaiting-author blocked-by-other-PR 226/0 Mathlib.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/GrayCode.lean,Mathlib/Data/Nat/Size.lean 5 5 ['Rida-Hamadani', 'alreadydone', 'github-actions', 'grunweg', 'leanprover-community-mathlib4-bot'] nobody
348-50256
11 months ago
348-50256
11 months ago
6-8380
6 days
13514 madvorak
author:madvorak
feat(Computability/ContextFreeGrammar): closure under union - [ ] depends on: #15895 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability merge-conflict blocked-by-other-PR 448/4 Mathlib/Computability/ContextFreeGrammar.lean 1 50 ['Rida-Hamadani', 'YaelDillies', 'github-actions', 'leanprover-community-mathlib4-bot', 'madvorak'] nobody
335-61584
11 months ago
335-61584
11 months ago
72-28392
72 days
17518 grunweg
author:grunweg
feat: lint on declarations mentioning `Invertible` or `Unique` Using the same infrastructure as for #10235. Depends on that PR to land first, and also (for the first lint) a zulip discussion if that change is desired/about the best way to enact it. --- - [ ] depends on: #10235 awaiting-zulip t-linter merge-conflict blocked-by-other-PR 149/7 Mathlib.lean,Mathlib/Algebra/MvPolynomial/PDeriv.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/TuringMachine.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/GroupTheory/Perm/DomMulAct.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/NumberTheory/JacobiSum/Basic.lean,Mathlib/Order/Heyting/Regular.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/FundamentalTheorem.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/UnusedAssumptionInType.lean 13 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mergify'] nobody
335-34317
11 months ago
361-22839
11 months ago*
0-0
0 seconds*
16428 FR-vdash-bot
author:FR-vdash-bot
test use `QuotLike` APIs --- - [ ] depends on: #16421 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict blocked-by-other-PR 1501/564 Mathlib.lean,Mathlib/Algebra/Associated/Basic.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Order/CauSeq/Completion.lean,Mathlib/Algebra/Quandle.lean,Mathlib/CategoryTheory/IsomorphismClasses.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Free/Coherence.lean,Mathlib/CategoryTheory/Skeletal.lean,Mathlib/Data/Finmap.lean,Mathlib/Data/Fintype/Quotient.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Multiset/Functor.lean,Mathlib/Data/QPF/Multivariate/Constructions/Fix.lean,Mathlib/Data/QPF/Univariate/Basic.lean,Mathlib/Data/Quot.lean,Mathlib/Data/QuotLike.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/Coset/Basic.lean,Mathlib/GroupTheory/Coset/Defs.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/ConjAct.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/GroupTheory/Subgroup/Center.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/LinearAlgebra/Quotient/Defs.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Logic/Relation.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Finite.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Lists.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/Topology/Inseparable.lean,test/QuotLike.lean 43 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
333-49396
10 months ago
333-49396
10 months ago
0-0
0 seconds
18716 jjaassoonn
author:jjaassoonn
feat(Algebra/Module/GradedModule): quotient and subgrading - [ ] depends on: #9820 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-CI merge-conflict blocked-by-other-PR WIP
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
329-34284
10 months ago
329-34284
10 months ago
0-0
0 seconds
18784 erdOne
author:erdOne
feat(AlgebraicGeometry) use `addMorphismPropertyInstances` --- - [ ] depends on: #18785 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry merge-conflict blocked-by-other-PR 435/91 Mathlib.lean,Mathlib/AlgebraicGeometry/Cover/Open.lean,Mathlib/AlgebraicGeometry/Morphisms/Affine.lean,Mathlib/AlgebraicGeometry/Morphisms/ClosedImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/FinitePresentation.lean,Mathlib/AlgebraicGeometry/Morphisms/FiniteType.lean,Mathlib/AlgebraicGeometry/Morphisms/OpenImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Proper.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiCompact.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiSeparated.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicGeometry/Morphisms/Smooth.lean,Mathlib/AlgebraicGeometry/Morphisms/UniversallyClosed.lean,Mathlib/AlgebraicGeometry/Restrict.lean,Mathlib/CategoryTheory/MorphismProperty/Composition.lean,Mathlib/CategoryTheory/MorphismProperty/Limits.lean,Mathlib/CategoryTheory/MorphismProperty/Tactic.lean,MathlibTest/AddMorphismPropertyInstances.lean 18 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
328-59705
10 months ago
328-59705
10 months ago
0-1869
31 minutes
16014 vihdzp
author:vihdzp
feat(SetTheory/Ordinal/Principal): even more lemmas on additively principal ordinals --- These are useful for my work on Cantor normal forms. - [ ] depends on: #15989 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory t-logic merge-conflict blocked-by-other-PR 99/60 Mathlib/SetTheory/Ordinal/Exponential.lean,Mathlib/SetTheory/Ordinal/Principal.lean 2 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
325-57747
10 months ago
325-57747
10 months ago
0-664
11 minutes
17593 FR-vdash-bot
author:FR-vdash-bot
chore(Algebra/Order/GroupWithZero/Unbundled): deprecate useless lemmas, use `ZeroLEOneClass` There are still some useless lemmas that were simply ported from `Algebra.Order.Monoid.Lemmas`, such as just chain an existing lemma with an assumption and lemmas whose assumptions imply `1 ≤ 0`. This PR removes them. Also, some lemmas have both assumptions like `1 < a` `0 < a`. This PR uses `ZeroLEOneClass` to remove redundant assumptions. --- - [ ] depends on: #17623 Ported from https://github.com/leanprover-community/mathlib/pull/16525 and https://github.com/leanprover-community/mathlib/pull/18158 Adapted from #9250. This version is easier to review. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order t-algebra merge-conflict blocked-by-other-PR
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 n/a ['FR-vdash-bot', 'github-actions', 'mathlib4-dependent-issues-bot', 'vihdzp'] nobody
317-53848
10 months ago
unknown
unknown
17624 FR-vdash-bot
author:FR-vdash-bot
feat(Algebra/Order/GroupWithZero/Unbundled): generalize lemmas --- - [ ] depends on: #17623 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
121/26 Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
314-4620
10 months ago
314-4620
10 months ago
0-465
7 minutes
17515 FR-vdash-bot
author:FR-vdash-bot
perf: do not need `simp low` now --- - [ ] depends on: #17513 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict 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
312-50041
10 months ago
312-50041
10 months ago
0-380
6 minutes
16210 FR-vdash-bot
author:FR-vdash-bot
Clean up quotient APIs ~~We may migrate to `Quot` and `IsEquiv` APIs in the future, but it might be a good start to clean up `Quotient` APIs anyway.~~ The diffs in this PR did not include `QuotLike` APIs, but eventually I decided to migrate to `QuotLike` before deprecating some old APIs. This is because some lemmas don't have alternatives that don't use `· ≈ ·`, and the alternatives that use `· ≈ ·` are in the core. See [Zulip](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/.60.28.C2.B7.20.E2.89.88.20.C2.B7.29.60.20in.20.60Quotient.60.20APIs/near/466970386). --- - [x] depends on: #16254 - [x] depends on: #16256 - [x] depends on: #16258 - [x] depends on: #16260 - [x] depends on: #16264 - [x] depends on: #16267 - [ ] depends on: #16314 - [x] depends on: #16410 - [x] depends on: #17588 - [x] depends on: #17594 - [x] depends on: #17940 - [ ] depends on: #17941 --- `QuotLike` - [ ] depends on: #16421 - [ ] depends on: #16428 --- [remaining diffs](https://github.com/leanprover-community/mathlib4/compare/FR_quot_now..FR_quot) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data tech debt merge-conflict blocked-by-other-PR 1015/1114 Counterexamples/CliffordAlgebraNotInjective.lean,Mathlib/Algebra/Associated/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset.lean,Mathlib/Algebra/CharZero/Quotient.lean,Mathlib/Algebra/DirectLimit.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Lie/Free.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/Module/Zlattice/Basic.lean,Mathlib/Algebra/Order/CauSeq/Completion.lean,Mathlib/Algebra/Periodic.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/StructureSheaf.lean,Mathlib/Analysis/Normed/Group/Quotient.lean,Mathlib/Analysis/Normed/Group/SemiNormedGrp/Kernels.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean,Mathlib/CategoryTheory/ConnectedComponents.lean,Mathlib/CategoryTheory/Limits/Shapes/SingleObj.lean,Mathlib/CategoryTheory/Limits/Types.lean,Mathlib/CategoryTheory/Skeletal.lean,Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/CategoryTheory/Subobject/FactorThru.lean,Mathlib/CategoryTheory/Subobject/Lattice.lean,Mathlib/Combinatorics/Quiver/ConnectedComponent.lean,Mathlib/Combinatorics/SimpleGraph/Path.lean,Mathlib/Computability/Reduce.lean,Mathlib/Computability/TuringMachine.lean,Mathlib/Data/Countable/Defs.lean,Mathlib/Data/FinEnum.lean,Mathlib/Data/Finite/Basic.lean,Mathlib/Data/Fintype/Basic.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Data/Fintype/Quotient.lean,Mathlib/Data/List/Cycle.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/Data/Setoid/Partition.lean,Mathlib/Data/Sym/Sym2.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/FieldTheory/PerfectClosure.lean,Mathlib/FieldTheory/SplittingField/Construction.lean,Mathlib/GroupTheory/Abelianization.lean,Mathlib/GroupTheory/Commensurable.lean,Mathlib/GroupTheory/CommutingProbability.lean,Mathlib/GroupTheory/Complement.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/Coprod/Basic.lean,Mathlib/GroupTheory/Coset/Basic.lean,Mathlib/GroupTheory/DoubleCoset.lean,Mathlib/GroupTheory/FreeAbelianGroup.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/ConjAct.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/Index.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/PGroup.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/SchurZassenhaus.lean,Mathlib/GroupTheory/Sylow.lean,Mathlib/GroupTheory/Transfer.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/LinearAlgebra/Dimension/Constructions.lean,Mathlib/LinearAlgebra/InvariantBasisNumber.lean,Mathlib/LinearAlgebra/Isomorphisms.lean,Mathlib/LinearAlgebra/Projectivization/Basic.lean,Mathlib/LinearAlgebra/Quotient.lean,Mathlib/LinearAlgebra/QuotientPi.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/MeasureTheory/Constructions/Polish/Basic.lean,Mathlib/MeasureTheory/Function/AEEqFun.lean,Mathlib/MeasureTheory/Group/FundamentalDomain.lean,Mathlib/MeasureTheory/MeasurableSpace/Basic.lean,Mathlib/MeasureTheory/Measure/Haar/Quotient.lean,Mathlib/ModelTheory/DirectLimit.lean,Mathlib/ModelTheory/Fraisse.lean,Mathlib/ModelTheory/Ultraproducts.lean,Mathlib/NumberTheory/NumberField/Embeddings.lean,Mathlib/NumberTheory/NumberField/Units/DirichletTheorem.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/RamificationInertia.lean,Mathlib/Order/Antisymmetrization.lean,Mathlib/Order/Category/PartOrd.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/Order/Partition/Finpartition.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/RepresentationTheory/GroupCohomology/Hilbert90.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Functoriality.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Congruence/Basic.lean,Mathlib/RingTheory/Flat/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousLocalization.lean 134 6 ['FR-vdash-bot', 'github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] nobody
308-38505
10 months ago
396-27586
1 year ago
0-0
0 seconds
19414 vihdzp
author:vihdzp
feat: Nesbitt's inequality We prove [Nesbitt's inequality](https://en.wikipedia.org/wiki/Nesbitt%27s_inequality) `3 / 2 ≤ a / (b + c) + b / (c + a) + c / (b + a)` for a linearly ordered semifield, by reduction to the AM-HM inequality. --- - [ ] depends on: #19415 - [ ] depends on: #19420 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra merge-conflict awaiting-author blocked-by-other-PR WIP
label:t-algebra$
192/142 Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Algebra/Order/Antidiag/Pi.lean,Mathlib/Algebra/Order/BigOperators/Ring/Finset.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Combinatorics/Enumerative/Catalan.lean,Mathlib/Data/Fin/Tuple/NatAntidiagonal.lean,Mathlib/Data/Fin/Tuple/Reflection.lean,Mathlib/Data/Fintype/BigOperators.lean 10 8 ['YaelDillies', 'github-actions', 'mathlib4-dependent-issues-bot', 'vihdzp'] nobody
306-365
10 months ago
306-365
10 months ago
0-481
8 minutes
18876 GabinKolly
author:GabinKolly
feat(ModelTheory/Fraisse): add proof that Fraïssé limits exist Fraïssé limits exist. --- All the preparatory work done in other files is contained in the pull request #18749, this pull request adds the work done in ModelTheory/Fraisse, the definition of the sequence of structures whose limit will be the Fraïssé limit, lemmas about this sequence, and then the proof that the limit is indeed a Fraïssé limit. - [ ] depends on: #18749 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic blocked-by-other-PR 666/5 Mathlib/ModelTheory/Bundled.lean,Mathlib/ModelTheory/DirectLimit.lean,Mathlib/ModelTheory/FinitelyGenerated.lean,Mathlib/ModelTheory/Fraisse.lean,Mathlib/ModelTheory/PartialEquiv.lean,Mathlib/ModelTheory/Substructures.lean 6 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
300-52080
9 months ago
326-42050
10 months ago
0-37
37 seconds
19281 Vierkantor
author:Vierkantor
chore(Algebra/{MonoidAlgebra,Polynomial}): algebra structure in `Basic.lean` [As discussed in PR 19205](https://github.com/leanprover-community/mathlib4/pull/19205#discussion_r1848539148) the Algebra structure on `Polynomial` and `MonoidAlgebra` is very fundamental and shouldn't be hidden away. So let's refactor the import hierarchy to make them available in `Basic.lean`. In addition to #19097, this moves the algebra structure on polynomials into `Algebra/Polynomial/Basic.lean` (which will import the other important instances on polynomials), and moves the algebra structure on `MonoidAlgebra`s into `Algebra/MonoidAlgebra/Basic.lean` (moving most of the existing results in that file into `Lemmas.lean`). --- - [ ] depends on: #19097 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
3506/2792 Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean,Mathlib.lean,Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Algebra/FreeAlgebra.lean,Mathlib/Algebra/FreeNonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MonoidAlgebra/Division.lean,Mathlib/Algebra/MonoidAlgebra/Lemmas.lean,Mathlib/Algebra/MonoidAlgebra/Lift.lean,Mathlib/Algebra/MonoidAlgebra/MapDomain.lean,Mathlib/Algebra/MonoidAlgebra/Module.lean,Mathlib/Algebra/MonoidAlgebra/Opposite.lean,Mathlib/Algebra/MonoidAlgebra/Support.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Cardinal.lean,Mathlib/Algebra/Polynomial/Coeff.lean,Mathlib/Algebra/Polynomial/Defs.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Degree/TrailingDegree.lean,Mathlib/Algebra/Polynomial/EraseUpdate.lean,Mathlib/Algebra/Polynomial/Eval/Defs.lean,Mathlib/Algebra/Polynomial/Eval/Degree.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/Algebra/Polynomial/Module.lean,Mathlib/Algebra/Polynomial/Monomial.lean,Mathlib/Algebra/Polynomial/Sum.lean,Mathlib/Algebra/Polynomial/Taylor.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Finsupp/Ext.lean,Mathlib/Data/Finsupp/Fintype.lean,Mathlib/Data/Finsupp/Indicator.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Finsupp/Pointwise.lean,Mathlib/Data/Finsupp/SMulWithZero.lean,Mathlib/Data/Finsupp/Single.lean,Mathlib/Data/List/ToFinsupp.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Eigs.lean,Mathlib/RepresentationTheory/Maschke.lean,Mathlib/RingTheory/FiniteType.lean,Mathlib/RingTheory/KrullDimension/Basic.lean,Mathlib/RingTheory/MvPolynomial/Basic.lean,Mathlib/RingTheory/Polynomial/Opposites.lean,Mathlib/RingTheory/Polynomial/Wronskian.lean,Mathlib/RingTheory/PowerSeries/Basic.lean,Mathlib/Tactic/ExtractGoal.lean,MathlibTest/Polynomial.lean,MathlibTest/instance_diamonds.lean,scripts/noshake.json 52 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
297-52210
9 months ago
307-29340
10 months ago
0-0
0 seconds
19621 Command-Master
author:Command-Master
feat: Multiplicity and prime-adic valuation of derivations --- - [ ] depends on: #19596 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra merge-conflict blocked-by-other-PR
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
287-48908
9 months ago
287-48908
9 months 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 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-category-theory merge-conflict blocked-by-other-PR WIP
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
287-40203
9 months ago
323-20268
10 months ago
0-0
0 seconds
11156 smorel394
author:smorel394
feat(LinearAlgebra/{TensorProductBasis,Dual}): basis and dual of `PiTensorProduct` Construct a basis of a `PiTensorProduct` of modules given bases of the modules, and relationship between the dual of a `PiTensorProduct` and the `PiTensorProduct` of the duals. Main results: * `Basis.piTensorProduct` (in `LinearAlgebra/TensorProductBasis.lean`): Let `ι` be a `Fintype` and `M` be a family of modules indexed by `ι`. If `b i : κ i → M i` is a basis for every `i` in `ι`, then `fun (p : Π i, κ i) ↦ ⨂ₜ[R] i, b i (p i)` is a basis of `⨂[R] i, M i`. * `PiTensorProduct.dualDistrib` (in `LinearAlgebra/Dual.lean`): The canonical linear map from `⨂[R] i, Dual R (M i)` to `Dual R (⨂[R] i, M i)`, sending `⨂ₜ[R] i, f i` to the composition of `PiTensorProduct.map f` with the linear equivalence `⨂[R] i, R →ₗ R` given by multiplication. * `PiTensorProduct.dualDistribEquiv` (also in `LinearAlgebra/Dual.lean`): A linear equivalence between `⨂[R] i, Dual R (M i)` and `Dual R (⨂[R] i, M i)` when all `M i` are finite free modules. If `f : (i : ι) → Dual R (M i)`, then this equivalence sends `⨂ₜ[R] i, f i` to the composition of `PiTensorProduct.map f` with the natural isomorphism `⨂[R] i, R ≃ R` given by multiplication. - [ ] depends on: #11155 (currently used as the base branch; do not merge without switching it back to `master`!) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-algebra merge-conflict please-adopt blocked-by-other-PR
label:t-algebra$
166/2 Mathlib/LinearAlgebra/DirectSum/Finsupp.lean,Mathlib/LinearAlgebra/Dual.lean,Mathlib/LinearAlgebra/TensorProduct/Basis.lean 3 4 ['eric-wieser', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
277-48333
9 months ago
322-63961
10 months ago
0-0
0 seconds
15269 kkytola
author:kkytola
feat: Add ENNReal.floor A right-continuous floor function on `ENNReal`. --- - [x] depends on: #13938 - [ ] depends on: #15773 (general type class for `ENat`-valued floor functions) - [x] depends on: #15380 (topology on `ENat` is needed to state right continuity of the floor function) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order t-algebra merge-conflict awaiting-author blocked-by-other-PR
label:t-algebra$
445/0 Mathlib.lean,Mathlib/Algebra/Order/EFloor.lean,Mathlib/Data/ENNReal/Floor.lean,Mathlib/Data/Nat/Lattice.lean 4 18 ['YaelDillies', 'github-actions', 'kkytola', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
274-21137
9 months ago
274-21137
9 months ago
0-3440
57 minutes
17471 joelriou
author:joelriou
feat(Algebra/ModuleCat/Differentials/Sheaf): the sheaf of relative differentials --- - [ ] depends on: #17366 - [x] depends on: #17388 - [x] depends on: #16755 - [ ] depends on: #17469 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebraic-geometry t-category-theory merge-conflict blocked-by-other-PR WIP 740/10 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Differentials/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Differentials/Sheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pullback.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/Ring/Hom/Defs.lean,Mathlib/AlgebraicGeometry/Modules/Differentials.lean,Mathlib/Geometry/RingedSpace/SheafedSpace.lean 9 n/a ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
265-35554
8 months ago
unknown
unknown
19462 joelriou
author:joelriou
feat(AlgebraicGeometry): étale sheafification After #19096 and #18945 are merged, if `S : Scheme.{u}`, we shall get instances like `HasSheafify (smallEtaleTopology S) (Type (u + 1))` which means that in order to sheafify preshaves over the small étale site of `S`, we need to assume a certain bump in the universe in the target category. With the main result in this PR (there are still a few sorries), we shall get `HasSheafify (smallEtaleTopology S) (Type u)`. Then, in the subsequent development of étale formalism, we can work in `Type u` (or `Ab.{u}`, etc). --- This is a draft. - [ ] depends on: #19444 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry merge-conflict blocked-by-other-PR WIP 1336/2 Mathlib.lean,Mathlib/AlgebraicGeometry/Sites/EtaleSheafification.lean,Mathlib/CategoryTheory/Sites/Continuous.lean,Mathlib/CategoryTheory/Sites/DenseSubsite.lean,Mathlib/CategoryTheory/Sites/LocallyFullyFaithful.lean,Mathlib/CategoryTheory/Sites/OneHypercover.lean,Mathlib/CategoryTheory/Sites/OneHypercoverDense.lean,Mathlib/CategoryTheory/Sites/Sieves.lean 8 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
263-48012
8 months ago
310-56149
10 months ago
0-200
3 minutes
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 new-contributor t-combinatorics merge-conflict blocked-by-other-PR 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', 'leanprover-community-mathlib4-bot'] YaelDillies
assignee:YaelDillies
260-50600
8 months ago
260-50600
8 months ago
0-1791
29 minutes
14412 jjaassoonn
author:jjaassoonn
feat: show stalk of presheaf of modules is a module over stalk of ring --- - [x] depends on: #14413 - [ ] depends on: #14501 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) workshop-AIM-AG-2024 t-algebraic-geometry merge-conflict blocked-by-other-PR 966/2 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/OverColimitsRing'.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/OverColimitsRing.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Limits/ConcreteCategory.lean,Mathlib/Geometry/RingedSpace/Basic.lean,Mathlib/Geometry/RingedSpace/Module.lean,Mathlib/Topology/Sheaves/Stalks.lean 8 5 ['github-actions', 'jjaassoonn', 'leanprover-community-mathlib4-bot', 'smorel394'] nobody
258-35102
8 months ago
414-58722
1 year ago
0-0
0 seconds
12670 trivial1711
author:trivial1711
feat: completion of a nonarchimedean multiplicative group We prove that the completion of a nonarchimedean multiplicative group is a nonarchimedean multiplicative group. --- - [x] depends on: #12669 - [ ] depends on: #11837 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-topology merge-conflict 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 n/a ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
246-23501
8 months ago
unknown
unknown
21277 GabinKolly
author:GabinKolly
feat(ModelTheory/PartialEquiv): Define the mapping of a self-partialEquiv through an embedding Define the mapping of a self-partialEquiv through an embedding and the notion of fully extendable partialEquiv. --- This is some preparatory work for #18876 - [ ] depends on: #21276 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic blocked-by-other-PR 215/5 Mathlib/ModelTheory/PartialEquiv.lean,Mathlib/ModelTheory/Substructures.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
246-20548
8 months ago
246-20550
8 months ago
0-668
11 minutes
20248 peabrainiac
author:peabrainiac
feat(Topology/Compactness): first-countable locally path-connected spaces are delta-generated Shows that all first-countable locally path-connected spaces are delta-generated (so in particular all normed spaces and convex subsets thereof are), and that delta-generated spaces are equivalently generated by the unit interval or standard simplices. --- - [ ] depends on: #21616 In principle, this should be close to all that's required to show that all simplicial complexes and CW-complexes are delta-generated; I just haven't done it yet because I'm not sure which file to best do it in. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-topology merge-conflict awaiting-author blocked-by-other-PR 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
236-12836
7 months ago
236-12836
7 months ago
39-21495
39 days
20956 tomaz1502
author:tomaz1502
feat(Computability/QueryComplexity/Sort.lean): Formalization of upper bound of queries for merge sort This PR builds on top of #20924 to prove that merge sort (as defined in Lean's library) never executes more than `3 * n * ceil_log2 n` comparisons, where `n` is the size of the input list and `ceil_log2` is the ceil of the logarithm in base 2, which is defined in this PR. Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2318629.20runtime.20complexity.20of.20sorting.20a.20list - [ ] depends on: #20924 Co-authored-by: Geoffrey Irving --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability blocked-by-other-PR 676/0 Mathlib.lean,Mathlib/Computability/QueryComplexity/Basic.lean,Mathlib/Computability/QueryComplexity/Defs.lean,Mathlib/Computability/QueryComplexity/Sort.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
225-25624
7 months ago
254-39137
8 months ago
0-41
41 seconds
22233 pechersky
author:pechersky
feat(Algebra/Valued): `AdicExpansion.evalAt` --- - [ ] depends on: #22231 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology blocked-by-other-PR 488/0 Mathlib.lean,Mathlib/Topology/Algebra/Valued/AdicExpansion.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
222-322
7 months ago
222-324
7 months ago
0-412
6 minutes
22232 pechersky
author:pechersky
feat(Algebra/Valued): `AdicExpansion.apprUpto` --- - [ ] depends on: #22231 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology blocked-by-other-PR 399/0 Mathlib.lean,Mathlib/Topology/Algebra/Valued/AdicExpansion.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
222-320
7 months ago
222-323
7 months ago
0-414
6 minutes
19372 Command-Master
author:Command-Master
find defeq abuse using diagnostics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #19177 large-import merge-conflict blocked-by-other-PR 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
214-56154
7 months ago
214-56154
7 months ago
0-0
0 seconds
14060 YnirPaz
author:YnirPaz
feat(SetTheory/Ordinal/Clubs): define club sets and prove basic properties Create a file where club sets are defined and their basic properties are proven. I also created a new recursion principle for ordinals, bounded recursion. --- - [ ] depends on: #19189 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-logic merge-conflict blocked-by-other-PR 315/3 Mathlib.lean,Mathlib/Order/SuccPred/Limit.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Club.lean,Mathlib/SetTheory/Ordinal/Topology.lean 6 93 ['YaelDillies', 'YnirPaz', 'alreadydone', 'dupuisf', 'github-actions', 'mathlib4-dependent-issues-bot', 'vihdzp', 'zeramorphic'] nobody
213-84357
6 months ago
213-84357
6 months ago
92-44198
92 days
17105 vihdzp
author:vihdzp
feat(Data/List/RunLength): run-length encoding We define the run-length encoding of a list. We provide a basic API, as well as a recursion principle. --- - [ ] depends on: #16837 - [x] depends on: #17106 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict blocked-by-other-PR 286/1 Mathlib/Data/List/Flatten.lean,Mathlib/Data/List/RunLength.lean,Mathlib/Data/List/SplitBy.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
213-84110
6 months ago
213-84110
6 months ago
0-0
0 seconds
16000 YaelDillies
author:YaelDillies
feat: Croot-Sisask Almost Periodicity Almost periodicity is nowadays a standard tool in additive combinatorics. From LeanAPAP --- - [ ] depends on: #15443 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis t-combinatorics blocked-by-other-PR 0/0 0 4 ['github-actions', 'leanprover-community-mathlib4-bot', 'mergify'] nobody
212-57944
6 months ago
212-57949
6 months ago
0-159
2 minutes
22340 sinhp
author:sinhp
feat(CategoryTheory): Locally Cartesian Closed Categories (Beck-Chevalley Conditions) Building on top of the API of `ExponentiableMorphism` in #22321, we state and prove Beck-Chevalley conditions. This will be crucial for our development of polynomial functors along exponentiable morphisms. Co-authored-by: Emily Riehl --- - [ ] depends on: #22321 - [ ] depends on: #22319 - [ ] depends on: #21525 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory merge-conflict blocked-by-other-PR WIP 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
212-45205
6 months ago
212-45205
6 months ago
0-17
17 seconds
21275 joneugster
author:joneugster
feat(Cache): decompress downloaded files directly Extract downloaded files directly. This increases parallelism as files are downloaded in parallel and downloading/decompressing use different hardware (network/cpu) --- - [ ] depends on: #21238 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI t-meta merge-conflict blocked-by-other-PR WIP 66/15 Cache/IO.lean,Cache/Lean.lean,Cache/Requests.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
210-59801
6 months ago
210-59801
6 months ago
0-0
0 seconds
20410 vihdzp
author:vihdzp
refactor: redefine `Equiv.Set.sumCompl = Equiv.sumCompl` It's still useful to have `Equiv.Set.sumCompl` around, as `simp` can't otherwise see through the def-eq `{x // x ∈ s} ⊕ {x // ¬ x ∈ s} = s ⊕ sᶜ`. --- - [ ] depends on: #20850 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-CI merge-conflict blocked-by-other-PR WIP 33/21 Mathlib/Logic/Equiv/Basic.lean,Mathlib/Logic/Equiv/Fintype.lean,Mathlib/Logic/Equiv/Set.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
197-79282
6 months ago
197-79282
6 months ago
0-0
0 seconds
23145 joneugster
author:joneugster
feat(CategoryTheory/Enriched/Limits): add IsConicalLimits --- - [ ] depends on: #23142 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) infinity-cosmos t-category-theory merge-conflict blocked-by-other-PR 221/9 Mathlib.lean,Mathlib/CategoryTheory/Enriched/Limits/HasConicalLimits.lean,Mathlib/CategoryTheory/Enriched/Limits/IsConicalLimit.lean 3 3 ['github-actions', 'joelriou', 'mathlib4-dependent-issues-bot'] nobody
196-32260
6 months ago
196-32260
6 months ago
0-806
13 minutes
20222 eric-wieser
author:eric-wieser
feat: generalize lemmas about derivatives Rather than creating a huge diff by shuffling things around, this generalizes everything in-place and swaps between `section`s for topological and normed vector spaces. The rationale for this approach is that: * we may further generalize the results of this file, and this avoids us jumbling up the order multiple times unnecessarily. * this greatly reduces the chance of merge conflicts --- - [ ] depends on: #21065 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict blocked-by-other-PR 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
186-64705
6 months ago
186-64705
6 months ago
16-16341
16 days
22321 sinhp
author:sinhp
feat(CategoryTheory): Locally Cartesian Closed Categories (Definition) This PR defines locally cartesian closed categories in terms of existence of the pushforward functors (right adjoint to the pullback functor) for all morphisms. We develop basic API and prove the following: 1. Existence of the pushforward functors is equivalent to cartesian closed slices. 2. Any locally cartesian closed category with a terminal object is cartesian closed. 3. The slices of a locally cartesian closed category are locally cartesian closed. Some of the content is based on the project of formalization of polynomial functors at the Trimester "Prospect of Formal Mathematics" at the Hausdorff Institute (HIM) in Bonn. https://github.com/sinhp/Poly I found this implementation of locally cartesian closed categories amenable to polynomial functors formalization. Co-authored-by: Emily Riehl --- - [ ] depends on: #21525 - [ ] depends on: #22319 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory merge-conflict blocked-by-other-PR 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
177-49420
5 months ago
177-49421
5 months ago
0-336
5 minutes
22319 sinhp
author:sinhp
feat(CategoryTheory): Locally Cartesian Closed Categories (Sections Right Adjoint) we define the `Over.sections` functor in the file `CategoryTheory.Comma.Over.Sections` and prove that it is a right adjoint to the `Over.star`, thereby solving an existing TODO in `Over.pullback` file. The `sections` functor is used to define the right adjoint to the pullback functor `Over.pullback` in the development of LCCCs. Moreover, the rest of added lemmas and theorems to `CategoryTheory.Comma.Over.Pullback` are crucial for the development of LCCCs in the next PR. --- - [ ] depends on: #21525 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory merge-conflict blocked-by-other-PR 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
177-49420
5 months ago
177-49422
5 months ago
0-2084
34 minutes
19475 YaelDillies
author:YaelDillies
feat: group markings From LeanCamCombi --- - [ ] depends on: #21342 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR WIP
label:t-algebra$
196/12 Mathlib.lean,Mathlib/Geometry/Group/Marking.lean,Mathlib/Topology/Algebra/ConstMulAction.lean,Mathlib/Topology/Algebra/Group/Quotient.lean 4 12 ['YaelDillies', 'b-mehta', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
175-70951
5 months ago
175-70970
5 months ago
22-16818
22 days
24010 grunweg
author:grunweg
feat(Counterexamples): a non-negative function, not a.e. zero, with vanishing lowe… …r Lebesgue integral. Came up in #23707, let's document this while we're at it. --- - [ ] depends on: #20722 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability please-adopt blocked-by-other-PR WIP 110/0 Counterexamples.lean,Counterexamples/LIntegralZero.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
173-24766
5 months ago
173-24768
5 months ago
0-22
22 seconds
24040 FR-vdash-bot
author:FR-vdash-bot
refactor: unbundle algebra from `(NonUnital){Seminormed, Normed}(Comm)Ring` --- - [ ] depends on: #23966 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) slow-typeclass-synthesis t-algebra t-analysis merge-conflict blocked-by-other-PR
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 n/a ['FR-vdash-bot', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
172-43380
5 months ago
unknown
unknown
24058 FR-vdash-bot
author:FR-vdash-bot
refactor: unbundle algebra from `*NormedField` --- - [ ] depends on: #24040 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) slow-typeclass-synthesis t-algebra t-analysis merge-conflict blocked-by-other-PR
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 ['FR-vdash-bot', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
171-38171
5 months ago
172-13990
5 months ago*
0-0
0 seconds*
24106 FR-vdash-bot
author:FR-vdash-bot
refactor: unbundle algebra from `*CStarAlgebra` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #24058 slow-typeclass-synthesis t-algebra t-analysis merge-conflict blocked-by-other-PR
label:t-algebra$
4702/4459 Archive/Hairer.lean,Archive/Imo/Imo1998Q2.lean,Counterexamples/LinearOrderWithPosMulPosEqZero.lean,Mathlib/Algebra/Algebra/RestrictScalars.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Covolume.lean,Mathlib/Algebra/Order/Field/Canonical.lean,Mathlib/Algebra/Order/Field/Rat.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Nonneg/Field.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Ring/Nat.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/CPolynomial.lean,Mathlib/Analysis/Analytic/CPolynomialDef.lean,Mathlib/Analysis/Analytic/ChangeOrigin.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/Analytic/Linear.lean,Mathlib/Analysis/Analytic/OfScalars.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Analytic/Polynomial.lean,Mathlib/Analysis/Analytic/RadiusLiminf.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Analytic/Within.lean,Mathlib/Analysis/Asymptotics/AsymptoticEquivalent.lean,Mathlib/Analysis/Asymptotics/Defs.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/Asymptotics/SuperpolynomialDecay.lean,Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/Asymptotics/Theta.lean,Mathlib/Analysis/BoundedVariation.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/DivergenceTheorem.lean,Mathlib/Analysis/BoxIntegral/Integrability.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Measure.lean,Mathlib/Analysis/CStarAlgebra/ApproximateUnit.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/Classes.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Integral.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Isometric.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/CStarAlgebra/ContinuousLinearMap.lean,Mathlib/Analysis/CStarAlgebra/ContinuousMap.lean,Mathlib/Analysis/CStarAlgebra/Exponential.lean,Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/Analysis/CStarAlgebra/Hom.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Defs.lean,Mathlib/Analysis/CStarAlgebra/Multiplier.lean,Mathlib/Analysis/CStarAlgebra/PositiveLinearMap.lean,Mathlib/Analysis/CStarAlgebra/SpecialFunctions/PosPart.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/CStarAlgebra/Unitization.lean,Mathlib/Analysis/CStarAlgebra/lpSpace.lean,Mathlib/Analysis/Calculus/AddTorsor/AffineMap.lean,Mathlib/Analysis/Calculus/AddTorsor/Coord.lean,Mathlib/Analysis/Calculus/BumpFunction/Basic.lean,Mathlib/Analysis/Calculus/BumpFunction/Convolution.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/BumpFunction/InnerProduct.lean,Mathlib/Analysis/Calculus/BumpFunction/Normed.lean,Mathlib/Analysis/Calculus/Conformal/InnerProduct.lean,Mathlib/Analysis/Calculus/Conformal/NormedSpace.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/ContDiff/CPolynomial.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/ContDiff/FiniteDimension.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Analysis/Calculus/ContDiff/WithLp.lean,Mathlib/Analysis/Calculus/DSlope.lean,Mathlib/Analysis/Calculus/Deriv/Abs.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/AffineMap.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Comp.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/Deriv/Inverse.lean,Mathlib/Analysis/Calculus/Deriv/Linear.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/Deriv/Pi.lean,Mathlib/Analysis/Calculus/Deriv/Polynomial.lean,Mathlib/Analysis/Calculus/Deriv/Pow.lean,Mathlib/Analysis/Calculus/Deriv/Prod.lean 670 5 ['FR-vdash-bot', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
170-77712
5 months ago
170-80019
5 months ago*
0-0
0 seconds*
24016 plp127
author:plp127
feat: fine uniformity Adds the fine uniformity, and proves some properties. --- - [ ] depends on: #24096 for showing the induced topology is equal on completely regular spaces [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology blocked-by-other-PR 283/0 Mathlib.lean,Mathlib/Topology/UniformSpace/FineUniformity.lean,Mathlib/Topology/UniformSpace/Uniformizable.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
170-10997
5 months ago
170-10999
5 months ago
2-85349
2 days
21238 joneugster
author:joneugster
feat(Cache): enable partial cache in downstream projects Add features to `cache` and cleanup code: * enable partial cache retrieval in downstream projects: `lake exe cache get MyProject.Basic` downloads only the relevant cache to build `MyProject/Basic.lean` * accept paths `Mathlib/Init.lean` and modules `Mathlib.Init` likewise #21822 * accept folders in the form `Mathlib/Data` or `Mathlib.Data` and does a directory walk to find all`.lean` files therein #21838 * throw error if sources contain a build loop. #21632 * cleanup * internally cache now works with the module names as keys (used paths before) #21834 * eliminate need of parsing the `lake_manifest.json`, use the Lean search path from `LEAN_SRC_PATH` instead. #21666 * eliminate most hard-coded file paths, generating them from the module name with `Lean.findLean` #21818 * add documentation --- - [x] depends on: #21834 - [ ] depends on: #21838 ### Follow-up PR: - #21842 ### Notes: - replaces: #21195 - should address: #8767 - should address: #20568 ### Completed: - [x] depends on: #21632 - [x] ~~depends on: #21663~~ - [x] depends on: #21666 - [x] depends on: #21701 - [x] depends on: #21703 - [x] depends on: #21704 - [x] depends on: #21705 - [x] depends on: #21707 - [x] depends on: #21711 - [x] depends on: #21750 - [x] depends on: #21815 - [x] depends on: #21816 - [x] depends on: #21817 - [x] depends on: #21818 - [x] depends on: #21822 - [x] depends on: #21830 - #21848 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI t-meta merge-conflict blocked-by-other-PR 231/118 Cache/Hashing.lean,Cache/IO.lean,Cache/Main.lean 3 n/a ['github-actions', 'grunweg', 'joneugster', 'kim-em', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
169-29825
5 months ago
unknown
unknown
21842 joneugster
author:joneugster
refactor(Cache): use module name for file hash instead of non-resolved file path This invalidates cache once, similarly to when the `lean-toolchain` gets bumped or the `lakefile` modified. --- - [ ] depends on: #21238 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI t-meta merge-conflict blocked-by-other-PR 284/139 Cache/Hashing.lean,Cache/IO.lean,Cache/Lean.lean,Cache/Main.lean 4 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
169-29701
5 months ago
232-26724
7 months ago*
0-0
0 seconds*
19467 quangvdao
author:quangvdao
feat(MvPolynomial/Equiv): Add `MvPolynomial.finSuccEquivNth` This PR adds `MvPolynomial.finSuccEquivNth`, which is the algebra isomorphism between `MvPolynomial (Fin (n + 1)) R` and `Polynomial (MvPolynomial (Fin n) R)` by identifying the `p`-th variable as the indeterminate. This generalizes `MvPolynomial.finSuccEquiv` which is only for the `0`-th variable. The supporting theorems for the `Nth` version are identical to the current version, with the `Nth` version deduced from the former. These changes require new definitions in `Finsupp/Fin`, which is a separate PR. Co-authored-by: Yaël Dillies --- - [ ] depends on: #19315 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
541/163 Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Fin/Tuple/Basic.lean,Mathlib/Data/Finsupp/Fin.lean,scripts/nolints_prime_decls.txt 7 9 ['acmepjz', 'github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'quangvdao'] nobody
169-23922
5 months ago
169-23922
5 months ago
0-790
13 minutes
22547 joelriou
author:joelriou
feat(CategoryTheory/Abelian): construction of reduced left resolutions The standard functorial free resolution of a `R`-module `M` does not directly extend to free resolutions of (bounded above) complexes because the free `R`-module functor does preserve zero morphisms. In this PR, we provide a general construction which takes functorial left resolutions and modify them by considering a suitable direct factor so that it preserves zero morphisms. --- - [ ] depends on: #22539 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory blocked-by-other-PR WIP 514/19 Mathlib.lean,Mathlib/Algebra/Homology/HomologicalComplex.lean,Mathlib/Algebra/Homology/LeftResolutions/Basic.lean,Mathlib/Algebra/Homology/LeftResolutions/Reduced.lean,Mathlib/Algebra/Homology/LeftResolutions/Transport.lean,Mathlib/CategoryTheory/Limits/Shapes/Kernels.lean 6 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
159-28233
5 months ago
213-50548
6 months ago
0-358
5 minutes
22556 joelriou
author:joelriou
feat(Algebra/Category/ModuleCat): a functorial projective resolution --- - [ ] depends on: #22539 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory blocked-by-other-PR 315/19 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/LeftResolutions.lean,Mathlib/Algebra/Homology/HomologicalComplex.lean,Mathlib/Algebra/Homology/LeftResolutions/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Kernels.lean 5 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
159-28103
5 months ago
213-44861
6 months ago
0-516
8 minutes
24549 grunweg
author:grunweg
feat: define embedded submanifolds, attempt 1 Not meant to be merged (I think a different design is better); opening this so I can find this more easily. --- - [ ] depends on: #23040 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict blocked-by-other-PR WIP 1445/2 Mathlib.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Splits.lean,Mathlib/Geometry/Manifold/Diffeomorph.lean,Mathlib/Geometry/Manifold/EmbeddedSubmanifold.lean,Mathlib/Geometry/Manifold/IsImmersionEmbedding.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/Manifold/MSplits.lean,Mathlib/LinearAlgebra/Prod.lean 8 2 ['leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
153-71190
5 months ago
153-71190
5 months ago
0-1
1 second
11003 thorimur
author:thorimur
chore: migrate to `tfae` block tactic Migrates to the `tfae` block tactic syntax, eliminating uses of `tfae_have` and `tfae_finish`. --- - [ ] depends on: #11000 - [ ] depends on: #10991 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict blocked-by-other-PR WIP 1267/1081 Mathlib/Algebra/Exact.lean,Mathlib/Algebra/Homology/ShortComplex/ExactFunctor.lean,Mathlib/Algebra/Order/ToIntervalMod.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/NormedSpace.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/CategoryTheory/Abelian/Exact.lean,Mathlib/CategoryTheory/Bicategory/Kan/Adjunction.lean,Mathlib/FieldTheory/Galois.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/LinearAlgebra/Eigenspace/Zero.lean,Mathlib/MeasureTheory/Group/Action.lean,Mathlib/NumberTheory/FLT/Basic.lean,Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/Order/Height.lean,Mathlib/Order/WellFoundedSet.lean,Mathlib/RingTheory/Bezout.lean,Mathlib/RingTheory/DiscreteValuationRing/TFAE.lean,Mathlib/RingTheory/Flat/EquationalCriterion.lean,Mathlib/RingTheory/Henselian.lean,Mathlib/RingTheory/LocalRing/RingHom/Basic.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/ValuationRing.lean,Mathlib/SetTheory/Ordinal/Topology.lean,Mathlib/Tactic/TFAE.lean,Mathlib/Topology/Algebra/Group/SubmonoidClosure.lean,Mathlib/Topology/Category/CompHaus/EffectiveEpi.lean,Mathlib/Topology/Category/Profinite/EffectiveEpi.lean,Mathlib/Topology/Category/Stonean/EffectiveEpi.lean,Mathlib/Topology/Inseparable.lean,Mathlib/Topology/LocallyClosed.lean,Mathlib/Topology/LocallyConstant/Basic.lean,Mathlib/Topology/NoetherianSpace.lean,Mathlib/Topology/Order/LeftRightNhds.lean,Mathlib/Topology/Separation.lean,Mathlib/Topology/UniformSpace/UniformConvergence.lean,scripts/noshake.json,test/tfae.lean 42 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
153-70006
5 months ago
153-70006
5 months ago
0-0
0 seconds
16186 joneugster
author:joneugster
chore: use emoji-variant-selector `\uFE0F` for emojis ✅️,❌️,💥️,🟡️ Append the emoji-variant selector `\uFE0F` to these 4 unicode symbols which should always be rendered as emojis. --- This has been done in core, so it makes sense to do the same in Mathlib. - [x] depends on: leanprover/lean4#5173 - [ ] depends on: #16215 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict awaiting-author blocked-by-other-PR 28/28 .github/workflows/lean4checker.yml,.github/workflows/nightly_detect_failure.yml,.github/workflows/update_dependencies_zulip.yml,scripts/lean-pr-testing-comments.sh,test/AssertExists.lean 5 3 ['github-actions', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
153-69690
5 months ago
153-69690
5 months ago
7-61243
7 days
21853 smmercuri
author:smmercuri
feat: the adele ring of a number field is locally compact --- - [ ] depends on: #21158 - [ ] depends on: #21847 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-number-theory merge-conflict blocked-by-other-PR WIP 398/3 Mathlib.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/NumberTheory/NumberField/AdeleRing.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/Valued/WithZeroMulInt.lean 9 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
151-35427
4 months ago
153-70828
5 months ago
0-0
0 seconds
15654 TpmKranz
author:TpmKranz
feat(Computability): language-preserving maps between NFA and RE Map REs to NFAs via Thompson's construction and NFAs to REs using GNFAs Last chunk of #12648 --- - [ ] depends on: #15651 - [ ] depends on: #15649 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-computability new-contributor merge-conflict blocked-by-other-PR 985/2 Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean,Mathlib/Computability/RegularExpressions.lean,Mathlib/Data/FinEnum/Option.lean,docs/references.bib 7 3 ['github-actions', 'leanprover-community-mathlib4-bot', 'meithecatte'] nobody
151-17125
4 months ago
151-17130
4 months ago
0-179
2 minutes
16553 grunweg
author:grunweg
WIP: tinkering with orientable manifolds - wait for Rida's PR to get merged - PR the "normed space" part separately - WIP: a linear isomorphism on a connected set is either orientation-preserving or orientation-preserving: this will require #8738, it seems - [ ] depends on: #16239 - [ ] depends on: #8738 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry blocked-by-other-PR WIP 287/0 Mathlib.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/Geometry/Manifold/Orientable.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
148-20303
4 months ago
386-69568
1 year ago
0-0
0 seconds
24550 grunweg
author:grunweg
feat: define `SliceModel` typeclass for models with corners for embedded submanifolds Still work in progress: TODO write a proper module doc-string and commit message. --- - [ ] depends on: #23040 (at least morally) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict blocked-by-other-PR WIP 1214/0 Mathlib.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Splits.lean,Mathlib/Geometry/Manifold/IsImmersionEmbedding.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/Manifold/MSplits.lean,Mathlib/Geometry/Manifold/SliceModel.lean 6 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
148-14388
4 months ago
148-14820
4 months ago
0-0
0 seconds
18755 FR-vdash-bot
author:FR-vdash-bot
refactor: deprecate `LinearIsometryClass` --- - [ ] depends on: #18748 - [ ] depends on: #18754 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-analysis merge-conflict blocked-by-other-PR
label:t-algebra$
243/116 Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/LocallyConvex/WeakOperatorTopology.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/Analysis/Normed/Operator/LinearIsometry.lean,Mathlib/Topology/Algebra/Module/Basic.lean,Mathlib/Topology/Algebra/Module/CharacterSpace.lean,Mathlib/Topology/Algebra/Module/FiniteDimension.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,Mathlib/Topology/Homeomorph.lean,Mathlib/Topology/MetricSpace/Isometry.lean,scripts/no_lints_prime_decls.txt 13 5 ['FR-vdash-bot', 'github-actions', 'leanprover-bot', 'mathlib4-dependent-issues-bot'] nobody
147-23834
4 months ago
322-66495
10 months ago
0-602
10 minutes
5863 eric-wieser
author:eric-wieser
feat: add elaborators for concrete matrices --- - [x] depends on: #5866 - [ ] depends on: #5897 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta blocked-by-other-PR help-wanted 257/7 Mathlib/Control/Monad/Cont.lean,Mathlib/Data/Matrix/Auto.lean,MathlibTest/matrix_auto.lean 3 7 ['eric-wieser', 'github-actions', 'kim-em', 'leanprover-community-bot-assistant'] nobody
132-18629
4 months ago
132-18650
4 months ago
0-0
0 seconds
25141 eric-wieser
author:eric-wieser
feat: basis for multilinear maps This attempts to tease an intermediate result out of #11155, which lets us show that multilinear maps are free even if their codomain is not finite. I guess this continues from https://github.com/leanprover-community/mathlib3/pull/10504 and https://github.com/leanprover-community/mathlib3/pull/14199. --- - [ ] depends on: #11155 - [ ] depends on: #25142 - [ ] depends on: #25169 - [ ] depends on: #25166 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
507/45 Mathlib.lean,Mathlib/LinearAlgebra/DFinsupp.lean,Mathlib/LinearAlgebra/DFinsupp/PiTensorProduct.lean,Mathlib/LinearAlgebra/DirectSum/Finsupp.lean,Mathlib/LinearAlgebra/DirectSum/PiTensorProduct.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basis.lean,Mathlib/LinearAlgebra/Multilinear/DFinsupp.lean,Mathlib/LinearAlgebra/Multilinear/DirectSum.lean,Mathlib/LinearAlgebra/Multilinear/FiniteDimensional.lean,Mathlib/LinearAlgebra/Multilinear/Pi.lean 11 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
127-38432
4 months ago
127-38433
4 months ago
0-0
0 seconds
25750 robin-carlier
author:robin-carlier
feat(Tactic/CategoryTheory): bicategory extension for `rotate_isos` This PR registers some lemmas to the `rotate_isos` tactic so that it applies in bicategorical contexts. For instance, if `α : g ⟶ h` is an invertible 2-cells, the term `f ◁ α ` is also recognized as invertible, with inverse `f ◁ α' `, where `α'` is the expression for the inverse constructed by the tactic. Without this extension, the tactic would only construct the generic `inv (f ◁ α)` as inverse for this term. --- - [ ] depends on: #25747 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24633.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24633* t-category-theory t-meta blocked-by-other-PR 1206/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Bicategory.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Cancelable.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Core.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Lemmas.lean,MathlibTest/CategoryTheory/RotateIsos.lean,scripts/noshake.json 8 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
113-67902
3 months ago
113-68071
3 months ago
0-0
0 seconds
25748 robin-carlier
author:robin-carlier
feat(Tactic/CategoryTheory): Initial lemmas for the `rotate_iso` tactic This PR records an initial set of lemmas to be used by the WIP `rotate_isos` tactic. --- - [ ] depends on: #25746 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24506.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24506* t-meta blocked-by-other-PR 496/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Cancelable.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Lemmas.lean,scripts/noshake.json 5 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
113-67901
3 months ago
113-67902
3 months ago
0-0
0 seconds
25747 robin-carlier
author:robin-carlier
feat(Tactic/CategoryTheory): the `rotate_isos` tactic We define a `rotate_isos` tactic for category theory in mathlib. At its core, the tactic transform terms of type `α(1) ≫ ⋯ ≫ α(k) = β(1) ≫ ⋯ ≫ β(l)` where `α` and `β` are families of morphisms in whith the first `i` morphisms of the left-hand side and the last `j` morphisms of the right-hand side are isomorhisms, into terms of type `α(k-i) ≫ ⋯ ≫ α(k) ≫ inv β(l) ≫ ⋯ ≫ β(l-j+1) = inv α(j) ≫ ⋯ ≫ inv α(1) ≫⋯ ≫ β(l-j)`. The construction of the inverses of expression are caried at the `Expr` levels are built out of the expressions of the morphisms, for instance, for this tactic, the inverse of `F.map (G.map (H.map f.hom)))` will directly be `F.map (G.map (H.map f.inv)))` (which would have to be re-simplified), rather than an `inv` term form an `IsIso` instance. The tactic can be applied at a local hypothesis or at the main goal, or can be used through a `rotate_isos%` term elaborator if e.g one wants to add such a "rotated" form to a `simp` or `rw` call. We also support removing morphisms "from the right" of the lhs, rather than from the right. --- The motivations behind this tactic are the following : - This tactic can "autogenerate" lemmas and terms generalizing lemmas such as [CategoryTheory.Iso.hom_inv_id_app_app_app](https://leanprover-community.github.io/mathlib4_docs/Mathlib/CategoryTheory/NatIso.html#CategoryTheory.Iso.hom_inv_id_app_app_app). This can also generate lemmas `F.map (G.map f.hom) ≫F.map (G.map f.inv) = 𝟙 _`, and can be used to unlock a `simp` call that blocks at an expression of the form `F.map (G.map f.hom) ≫F.map (G.map f.inv) `. - Currently, cancelling morphisms "from the right" in an expression in category theory is a bit of a pain. You have to first reassociate the expression, perform multiple calls to `Iso.inv_comp_eq`, reassociate, etc. This at least automates this process in a fairly straightforward way. - There are expressions in category theory that have no "right forms", e.g the pentagon axiom for monoidal categories, which has many variations in the way one can read the diagram of isomorphisms that represents it. Elaborators such as `rotate_iso%` easily generates all possible forms of such identities from one single form, and avoids having to state multiple forms of the same equality as individual lemmas. - I have been playing with medium-sized diagrams of isomorphisms recently (think for example vertical/horizontal compositions of `CatCommSq`, whiskering a corner of such diagrams, etc.), and it made me wish a lot of time that such easy way to transforms equalities to equivalent forms were available. - [ ] depends on: #25746 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24454.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24454* t-category-theory t-meta awaiting-author blocked-by-other-PR WIP 871/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Cancelable.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Core.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Lemmas.lean,MathlibTest/CategoryTheory/RotateIsos.lean,scripts/noshake.json 7 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
113-67901
3 months ago
113-68154
3 months ago
0-0
0 seconds
25751 robin-carlier
author:robin-carlier
feat(Tactic/CategoryTheory): monoidal extension of `rotate_isos` This PR registers some lemmas to the `rotate_isos` tactic so that it applies in monoidal contexts. For instance, if α : y ⟶ z is an invertible morphism, the term x ◁ α is also recognized as invertible, with inverse x ◁ α' , where α' is the expression for the inverse constructed by the tactic. Without this extension, the tactic would only construct the generic inv (x ◁ α) as inverse for this term. We also take care of terms of the form `f ⊗ g` --- - [ ] depends on: #25747 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24634.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24634* t-category-theory t-meta blocked-by-other-PR 1362/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Cancelable.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Core.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Lemmas.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Monoidal.lean,MathlibTest/CategoryTheory/RotateIsos.lean,scripts/noshake.json 8 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
113-66920
3 months ago
113-67766
3 months ago
0-0
0 seconds
25752 robin-carlier
author:robin-carlier
feat(Tactic/CategoryTheory): whiskering lemmas for `rotate_isos` This PR extends the base set of terms recognized by the `rotate_isos` tactic to include terms of the form `whiskerLeft F f`, `isoWhiskerLeft F e`, and `NatTrans.hcomp`/ `NatIso.hcomp`. --- - [ ] depends on: #25747 Technically, it could depend solely on #24506, but there’s not much point getting this merged if the base tactic is not there. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24650.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24650* t-meta blocked-by-other-PR 1365/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Cancelable.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Core.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Lemmas.lean,MathlibTest/CategoryTheory/RotateIsos.lean,scripts/noshake.json 7 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
113-66921
3 months ago
113-66922
3 months ago
0-0
0 seconds
25912 BoltonBailey
author:BoltonBailey
feat: add simp lemmas for trig functions on `π * 2⁻¹` This PR adds a number of simp lemmas to reduce trig functions evaluated on `π * 2⁻¹`. This allows `simp` to reduce expressions such as `sin (π * (1 / 2))` --- - [ ] depends on: #25911 [experiment with simp normal form] Original PR: #24213 t-analysis awaiting-author blocked-by-other-PR 45/0 Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean 1 3 ['BoltonBailey', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
110-42013
3 months ago
110-42609
3 months ago
0-136
2 minutes
18771 joelriou
author:joelriou
feat(LinearAlgebra/ExteriorPower): exterior powers of free modules are free Co-authored-by: sophie.morel@ens-lyon.fr --- - [ ] depends on: #18662 - [x] depends on: #18534 - [x] depends on: #18651 - [x] depends on: #18590 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict blocked-by-other-PR WIP
label:t-algebra$
1185/160 Mathlib.lean,Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/Sum/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Basis.lean,Mathlib/LinearAlgebra/ExteriorPower/Generators.lean,Mathlib/LinearAlgebra/ExteriorPower/Pairing.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Multilinear/TensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/LinearAlgebra/TensorAlgebra/ToTensorPower.lean,Mathlib/LinearAlgebra/TensorPower/Basic.lean,Mathlib/LinearAlgebra/TensorPower/Pairing.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean 19 3 ['alreadydone', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
106-64168
3 months ago
322-66494
10 months ago
0-0
0 seconds
25926 BoltonBailey
author:BoltonBailey
feat: add lemma about `degreeOf_eq_degree` Adds MvPolynomial.degreeOf_eq_degree, which states that the degree of a particular variable in a multivariate polynomial is equal to the degree of the single-variable polynomial obtained by treating the multivariable polynomial as a single variable polynomial over multivariable polynomials in the remaining variables. This PR continues the work from #12664. - [ ] depends on: #25920 depends on https://github.com/leanprover-community/mathlib4/pull/25920 t-algebra blocked-by-other-PR
label:t-algebra$
50/0 Mathlib/Algebra/MvPolynomial/Equiv.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
105-38123
3 months ago
105-38124
3 months ago
5-1720
5 days
25925 BoltonBailey
author:BoltonBailey
feat: file for lemmas about MvPolynomials over NoZeroDivisors This PR continues the work from #11106 and #11073 Original PR: https://github.com/leanprover-community/mathlib4/pull/11106 - [x] depends on: #11095 - [x] depends on: #11094 - [ ] depends on: #25926 [We need this lemma to establish fact about degreeOf n (p + q)] t-algebra blocked-by-other-PR
label:t-algebra$
85/0 Mathlib/Algebra/MvPolynomial/NoZeroDivisors.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
104-16724
3 months ago
104-16725
3 months ago
0-0
0 seconds
20051 Timeroot
author:Timeroot
feat: `Clone` and some instances Defines clones (`Clone`). And there is a file, `Instances.lean`, that gives several most important examples of Clones. In particular, it has all of the clones (in an appropriately general form) that occur in [Post's Lattice](https://en.wikipedia.org/wiki/Post%27s_lattice), and [later proving](https://github.com/leanprover-community/mathlib4/pull/24744) the completeness of Post's Lattice is why I'm making this PR. (Edit: Used to also say "Defined operads (`Operad`), symmetric operads (`SymmOperad`), and clones ... There is a proof that all clones have a natural operad structure.". This has been scrapped.) --- - [x] depends on: #20133 [basics and notations] - [x] depends on: #20134 [permutations] - [x] depends on: #20138 [operad] - [x] depends on: #20141 [clone] - [x] depends on: #23459 [defs] - [ ] depends on: #23460 [basic] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author blocked-by-other-PR
label:t-algebra$
623/0 Mathlib.lean,Mathlib/Algebra/Clone/Basic.lean,Mathlib/Algebra/Clone/Defs.lean,Mathlib/Algebra/Clone/Instances.lean,Mathlib/Data/Fin/Basic.lean 5 32 ['Timeroot', 'YaelDillies', 'eric-wieser', 'github-actions', 'jcommelin', 'kbuzzard', 'kim-em', 'mathlib4-dependent-issues-bot', 'wmacmil'] nobody
101-86393
3 months ago
187-27633
6 months ago
43-16103
43 days
26391 grunweg
author:grunweg
feat: immersed submanifolds Still under construction --- - [ ] depends on: #26087 - [ ] depends on: #23040 Better version of #24549. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry blocked-by-other-PR WIP 1418/0 Mathlib.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Splits.lean,Mathlib/Geometry/Manifold/EmbeddedSubmanifold.lean,Mathlib/Geometry/Manifold/IsImmersionEmbedding.lean,Mathlib/Geometry/Manifold/MSplits.lean 5 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
100-30552
3 months ago
100-82859
3 months ago
0-0
0 seconds
18662 joelriou
author:joelriou
feat(LinearAlgebra/ExteriorPower): generators of the exterior powers --- - [x] depends on: #18534 - [x] depends on: #18590 - [ ] depends on: #26464 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict blocked-by-other-PR WIP
label:t-algebra$
818/158 Mathlib.lean,Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/Sum/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Generators.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Multilinear/TensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/LinearAlgebra/TensorPower.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean 15 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
98-70623
3 months ago
322-66498
10 months ago
0-0
0 seconds
18735 joelriou
author:joelriou
feat(Algebra/Module): presentation of the exterior power Given a presentation of a `R`-module `M`, we obtain a presentation of `⋀[R]^n M`. --- (Still one sorry left.) - [ ] depends on: #18527 - [ ] depends on: #18432 - [ ] depends on: #26464 - [ ] depends on: #18534 - [ ] depends on: #18662 - [x] depends on: #18590 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict blocked-by-other-PR WIP
label:t-algebra$
1856/157 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Module/Presentation/Basic.lean,Mathlib/Algebra/Module/Presentation/ExteriorPower.lean,Mathlib/Algebra/Module/Presentation/PiTensor.lean,Mathlib/Algebra/Module/Presentation/Tensor.lean,Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/Sum/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Generators.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Multilinear/TensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/LinearAlgebra/TensorPower.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean 20 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
98-66597
3 months ago
322-66496
10 months ago
0-0
0 seconds
18551 joelriou
author:joelriou
feat(AlgebraicGeometry): the algebraic De Rham complex If `B` is an `A`-algebra, we construct the algebraic De Rham complex of `B` over `A`: it is a cochain complex of `A`-modules. --- - [ ] depends on: #18735 - [ ] depends on: #18662 - [ ] depends on: #26464 - [ ] depends on: #18534 - [ ] depends on: #18527 - [x] depends on: #18440 - [ ] depends on: #18432 - [x] depends on: #18408 - [x] depends on: #18389 - [x] depends on: #18374 - [x] depends on: #18359 - [x] depends on: #18332 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-algebraic-geometry merge-conflict blocked-by-other-PR WIP
label:t-algebra$
2836/156 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Module/Presentation/Basic.lean,Mathlib/Algebra/Module/Presentation/Cokernel.lean,Mathlib/Algebra/Module/Presentation/Differentials.lean,Mathlib/Algebra/Module/Presentation/DirectSum.lean,Mathlib/Algebra/Module/Presentation/ExteriorPower.lean,Mathlib/Algebra/Module/Presentation/PiTensor.lean,Mathlib/Algebra/Module/Presentation/RestrictScalars.lean,Mathlib/Algebra/Module/Presentation/Tensor.lean,Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Sum/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Generators.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Multilinear/TensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/LinearAlgebra/TensorPower.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/RingTheory/DeRham/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean 26 n/a ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
98-66593
3 months ago
unknown
unknown
26149 vasnesterov
author:vasnesterov
feat(Topology): continuous surjection from Cantor set to Hilbert cube --- - [ ] depends on: #26136 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-topology merge-conflict blocked-by-other-PR 752/0 Mathlib.lean,Mathlib/Algebra/Order/Floor/Semiring.lean,Mathlib/Data/Nat/Cast/Order/Field.lean,Mathlib/Data/Real/OfDigits.lean,Mathlib/Topology/Homeomorph/Defs.lean,Mathlib/Topology/Instances/CantorSet.lean,Mathlib/Topology/MetricSpace/HausdorffAlexandroff.lean,scripts/noshake.json 8 5 ['alreadydone', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'vasnesterov'] nobody
90-80406
2 months ago
90-80407
2 months ago
0-2240
37 minutes
26184 vasnesterov
author:vasnesterov
feat(Topology): every compact metric space is image of Cantor set --- - [ ] depends on: #26027 - [ ] depends on: #26149 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-topology merge-conflict blocked-by-other-PR 869/0 Mathlib.lean,Mathlib/Algebra/Order/Floor/Semiring.lean,Mathlib/Data/Nat/Cast/Order/Field.lean,Mathlib/Data/Real/OfDigits.lean,Mathlib/Topology/Compactness/HilbertCubeEmbedding.lean,Mathlib/Topology/Homeomorph/Defs.lean,Mathlib/Topology/Instances/CantorSet.lean,Mathlib/Topology/MetricSpace/HausdorffAlexandroff.lean,scripts/noshake.json 9 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
90-80401
2 months ago
90-80402
2 months ago
0-602
10 minutes
26185 vasnesterov
author:vasnesterov
feat(Counterexamples): Peano curve Prove the existence of a continuous surjection from `unitInterval` onto `unitInterval × unitInterval`. --- - [ ] depends on: #26184 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-topology merge-conflict blocked-by-other-PR 927/0 Counterexamples.lean,Counterexamples/PeanoCurve.lean,Mathlib.lean,Mathlib/Algebra/Order/Floor/Semiring.lean,Mathlib/Data/Nat/Cast/Order/Field.lean,Mathlib/Data/Real/OfDigits.lean,Mathlib/Topology/Compactness/HilbertCubeEmbedding.lean,Mathlib/Topology/Homeomorph/Defs.lean,Mathlib/Topology/Instances/CantorSet.lean,Mathlib/Topology/MetricSpace/HausdorffAlexandroff.lean,scripts/noshake.json 11 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
90-80400
2 months ago
90-80401
2 months ago
0-1381
23 minutes
26395 winstonyin
author:winstonyin
feat: $C^1$ vector fields on compact manifolds define global flows This PR continues the work from #22254. Original PR: https://github.com/leanprover-community/mathlib4/pull/22254 Any $C^1$ vector field on a compact boundaryless manifold `M` defines a unique global flow `ℝ → M → M`. - [ ] depends on: #26394 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict blocked-by-other-PR WIP 841/406 Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Order/Filter/Prod.lean,docs/1000.yaml,docs/undergrad.yaml 7 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'winstonyin'] nobody
90-80264
2 months ago
90-80264
2 months ago
0-52
52 seconds
26465 joelriou
author:joelriou
feat(Algebra/Module): presentation of the `PiTensorProduct` Given a presentation of a finite number of `R`-modules `M i`, we obtain a presentation of the module `⨂[R] i, M i`. --- - [ ] depends on: #26464 This PR continues the work from #18527. Original PR: https://github.com/leanprover-community/mathlib4/pull/18527 file-removed t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
525/4 Mathlib.lean,Mathlib/Algebra/Module/Presentation/PiTensor.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/Set/ComplSingletonLift.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/TensorPower/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean,Mathlib/SetTheory/Cardinal/Finite.lean 10 4 ['github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
90-80134
2 months ago
90-80135
2 months ago
0-2063
34 minutes
26467 joelriou
author:joelriou
feat(LinearAlgebra): the tensor product of a finite family of free modules is free --- - [ ] depends on: #26464 - [ ] depends on: #26465 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-algebra merge-conflict blocked-by-other-PR WIP
label:t-algebra$
607/7 Mathlib.lean,Mathlib/Algebra/Module/Presentation/Free.lean,Mathlib/Algebra/Module/Presentation/PiTensor.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/Set/ComplSingletonLift.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basis.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/TensorPower/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean,Mathlib/SetTheory/Cardinal/Finite.lean 12 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
90-80132
2 months ago
90-80133
2 months ago
0-2
2 seconds
26168 oliver-butterley
author:oliver-butterley
feat(MeasureTheory.VectorMeasure) : variation defined as a supremum is equal to variation defined using the Hahn-Jordan decomposition. Add `signedMeasure_totalVariation_eq`: if `μ` is a `SignedMeasure` then variation defined as a supremum is equal to variation defined using the Hahn-Jordan decomposition. Co-authored-by: @yoh-tanimoto - [ ] depends on: #26165 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability blocked-by-other-PR 680/0 Mathlib.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Equiv.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Lemmas.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
90-64322
2 months ago
90-64851
2 months ago
15-65390
15 days
26165 oliver-butterley
author:oliver-butterley
feat(MeasureTheory.VectorMeasure): add lemma which shows that variation of a `ℝ≥0∞` VectorMeasure is equal to itself Add a lemma for the variation of a VectorMeasure which tells that if `μ` is `VectorMeasure X ℝ≥0∞` then `variation μ = μ`. Co-authored-by: @yoh-tanimoto - [ ] depends on: #26160 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability blocked-by-other-PR 467/0 Mathlib.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Lemmas.lean 3 1 ['github-actions'] nobody
90-64322
2 months ago
90-64878
2 months ago
15-66224
15 days
26160 oliver-butterley
author:oliver-butterley
feat(MeasureTheory.VectorMeasure): add several lemmas which characterize variation Add the following lemmas concerning variation of a VectorMeasure: * `norm_measure_le_variation`: `‖μ E‖ₑ ≤ variation μ E`. * `variation_neg`: `(-μ).variation = μ.variation`. * `variation_zero`: `(0 : VectorMeasure X V).variation = 0`. * `absolutelyContinuous` Co-authored-by: @yoh-tanimoto - [ ] depends on: #26156 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability blocked-by-other-PR 432/0 Mathlib.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Lemmas.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
90-64321
2 months ago
90-64930
2 months ago
15-68781
15 days
24912 YaelDillies
author:YaelDillies
feat: affine monoids Define affine monoids as finitely generated cancellative torsion-free commutative monoids and prove a few of their basic properties: * An affine monoid with no non-trivial unit is generated by its irreducible elements * An affine monoid embeds into `ℤⁿ` for some `n` * Let `M` be an affine monoid. If `R` is a domain, then so is `R[M]`. From Toric Co-authored-by: Patrick Luo --- - [x] depends on: #24913 - [x] depends on: #24914 - [ ] depends on: #26110 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) toric t-algebra blocked-by-other-PR
label:t-algebra$
214/0 Mathlib.lean,Mathlib/Algebra/AffineMonoid/Basic.lean,Mathlib/Algebra/AffineMonoid/Embedding.lean,Mathlib/Algebra/AffineMonoid/Irreducible.lean,Mathlib/Algebra/AffineMonoid/UniqueSums.lean 5 15 ['YaelDillies', 'b-mehta', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'smorel394'] nobody
90-56818
2 months ago
107-39030
3 months ago
7-26907
7 days
24627 pechersky
author:pechersky
feat(Topology/Algebra/Valued): `IsLinearTopology 𝒪[K] K` and `𝒪[K] 𝒪[K]` as well as `IsLinearTopology ℤ_[p] ℤ_[p]` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #26829 t-topology merge-conflict awaiting-author blocked-by-other-PR 376/30 Mathlib.lean,Mathlib/NumberTheory/Padics/LinearTopology.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/Integers.lean,Mathlib/Topology/Algebra/Valued/LinearTopology.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/ValuedField.lean 8 41 ['ADedecker', 'faenuccio', 'github-actions', 'leanprover-community-bot-assistant', 'loefflerd', 'mathlib4-dependent-issues-bot', 'pechersky'] nobody
89-19570
2 months ago
90-82963
2 months ago
19-50489
19 days
10654 smorel394
author:smorel394
feat(LinearAlgebra/{ExteriorPower,LinearIndependent,TensorPower}): define the exterior powers of a module and prove some of their basic properties This introduces the exterior powers of a module and proves some of their basic properties, in `LinearAlgebra/ExteriorPower/Basic.lean` and `LinearAlgebra/ExteriorPower/Generators.lean`. It also adds a lemma in `LinearAlgebra/LinearIndependent.lean` (`linearIndependent_of_dualFamily` : if a family of vectors admits a "dual" family of linear forms, then it is linearly independent) and a construction in `LinearAlgebra/TensorPower.lean` (`linearFormOfFamily` : the linear form on the tensor power of `M` obtained by multiplying a family of linear forms on `M`). # Main definitions ## In `LinearAlgebra/ExteriorPower/Basic.lean`: * `ExteriorPower R n M` is the `n`th exterior power of a `R`-module `M`, defined as `LinearMap.range (ExteriorAlgebra.ι R : M →ₗ[R] ExteriorAlgebra R M) ^ n`. We also introduce the notation `Λ[R]^n M` for `ExteriorPower R n M`. * `ExteriorPower.ιMulti` is the canonical alternating map on `M` with values in `Λ[R]^n M`. * `ExteriorPower.map`: functoriality of exterior powers with respect to linear maps between modules. * `ExteriorPower.toTensorPower`: linear map from the `n`th exterior power to the `n`th tensor power (coming from `MultilinearMap.alternatization` via the universal property of exterior powers). ## In `LinearAlgebra/ExteriorPower/Generators.lean`: * `ExteriorPower.BasisOfBasis`: If `b` is a basis of `M` (indexed by a linearly ordered type), the basis of the `n`th exterior power of `M` formed by the `n`-fold exterior products of elements of `b`. # Main theorems ## In `LinearAlgebra/ExteriorPower/Basic.lean`: * The image of `ExteriorPower.ιMulti` spans `Λ[R]^n M`. * `ExteriorPower.liftAlternatingEquiv` (universal property of the `n`th exterior power of `M`): the linear equivalence between linear maps from `Λ[R]^n M` to a module `N` and `n`-fold alternating maps from `M` to `N`. * `ExteriorPower.map_injective_field`: If `f : M →ₗ[R] N` is injective and `R` is a field, then `ExteriorPower.map n f` is injective. * `ExteriorPower.map_surjective`: If `f : M →ₗ[R] N` is surjective, then `ExteriorPower.map n f` is surjective. * `ExteriorPower.mem_exteriorPower_is_mem_finite`: Every element of `Λ[R]^n M` is in the image of `Λ[R]^n P` for some finitely generated submodule `P` of `M`. ## In `LinearAlgebra/ExteriorPower/Generators.lean`: * `ExteriorPower.Finite`: The `n`th exterior power of a finite module is a finite module. * `ExteriorPower.span_top_of_span_top` and `ExteriorPower.span_top_of_span_top'`: If a family of vectors spans `M`, then the family of its `n`-fold exterior products spans `Λ[R]^n M`. (We give versions in the exterior algebra and in the exterior power.) * `ExteriorPower.FreeOfFree`: If `M` is a free module, then so is its `n`th exterior power. * `ExteriorPower.FinrankOfFiniteFree`: If `R` satisfies the strong rank condition and `M` is finite free of rank `r`, then the `n`th exterior power of `M` is of finrank `Nat.choose r n`. * `ExteriorPower.ιMulti_family_linearIndependent_field`: If `R` is a field, and if `v` is a linearly independent family of vectors (indexed by a linearly ordered type), then the family of its `n`-fold exterior products is also linearly independent. - [x] depends on: #10744 - [ ] depends on: #11156 - [x] depends on: #18590 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra merge-conflict please-adopt blocked-by-other-PR
label:t-algebra$
739/0 Mathlib.lean,Mathlib/LinearAlgebra/ExteriorPower/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Generators.lean,Mathlib/LinearAlgebra/LinearIndependent.lean,Mathlib/LinearAlgebra/TensorPower.lean 5 46 ['Ruben-VandeVelde', 'YaelDillies', 'bustercopley', 'eric-wieser', 'github-actions', 'joelriou', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mattrobball', 'pink10000', 'smorel394'] eric-wieser
assignee:eric-wieser
80-78829
2 months ago
303-24211
9 months ago
22-67320
22 days
26884 alreadydone
author:alreadydone
Universal cover --- - [ ] depends on: #24983 - [ ] depends on: #22771 - [ ] depends on: #22782 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict blocked-by-other-PR WIP 1126/359 Mathlib.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/StructureSheaf.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean,Mathlib/CategoryTheory/Groupoid.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Geometry/Manifold/Sheaf/Smooth.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Topology/Covering.lean,Mathlib/Topology/EtaleSpace.lean,Mathlib/Topology/FiberBundle/Trivialization.lean,Mathlib/Topology/Homotopy/HomotopyGroup.lean,Mathlib/Topology/Homotopy/Lifting.lean,Mathlib/Topology/Homotopy/Product.lean,Mathlib/Topology/IsLocalHomeomorph.lean,Mathlib/Topology/Sheaves/LocalPredicate.lean,Mathlib/Topology/Sheaves/Sheafify.lean,Mathlib/Topology/Sheaves/Stalks.lean 20 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
80-64226
2 months ago
86-37676
2 months ago
0-0
0 seconds
26950 alreadydone
author:alreadydone
Primitives of holomorphic functions and path integral --- - [ ] depends on: #22782 - [x] depends on: #24983 - [ ] depends on: #22771 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis t-topology merge-conflict blocked-by-other-PR WIP 1288/361 Mathlib.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/StructureSheaf.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean,Mathlib/Analysis/Complex/Primitive.lean,Mathlib/CategoryTheory/Groupoid.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Geometry/Manifold/Sheaf/Smooth.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Topology/Covering.lean,Mathlib/Topology/EtaleSpace.lean,Mathlib/Topology/FiberBundle/Trivialization.lean,Mathlib/Topology/Homotopy/HomotopyGroup.lean,Mathlib/Topology/Homotopy/Lifting.lean,Mathlib/Topology/Homotopy/Product.lean,Mathlib/Topology/IsLocalHomeomorph.lean,Mathlib/Topology/Sheaves/LocalPredicate.lean,Mathlib/Topology/Sheaves/Sheafify.lean,Mathlib/Topology/Sheaves/Stalks.lean 21 n/a ['mathlib4-dependent-issues-bot'] nobody
80-60667
2 months ago
unknown
unknown
27070 vasnesterov
author:vasnesterov
golf: use `order` --- - [ ] depends on: #26580 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict blocked-by-other-PR WIP 619/466 Mathlib.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/ContinuedFractions/Computation/CorrectnessTerminating.lean,Mathlib/Algebra/ContinuedFractions/Computation/Translations.lean,Mathlib/Algebra/GeomSum.lean,Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Homology/ShortComplex/Ab.lean,Mathlib/Algebra/Lie/Ideal.lean,Mathlib/Algebra/Lie/IdealOperations.lean,Mathlib/Algebra/Lie/Semisimple/Basic.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/MvPolynomial/Division.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Indicator.lean,Mathlib/Algebra/Order/Rearrangement.lean,Mathlib/Algebra/Order/Ring/IsNonarchimedean.lean,Mathlib/Algebra/Order/Star/Prod.lean,Mathlib/Algebra/Order/ToIntervalMod.lean,Mathlib/Algebra/Polynomial/CoeffMem.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Inductions.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/Polynomial/Sequence.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean,Mathlib/AlgebraicGeometry/ValuativeCriterion.lean,Mathlib/AlgebraicTopology/SimplicialObject/Split.lean,Mathlib/Analysis/Calculus/Deriv/MeanValue.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/ConstantSpeed.lean,Mathlib/Analysis/Convex/StrictConvexBetween.lean,Mathlib/Analysis/Convex/Uniform.lean,Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Analysis/Matrix.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/MeanInequalitiesPow.lean,Mathlib/Analysis/Meromorphic/FactorizedRational.lean,Mathlib/Analysis/Meromorphic/NormalForm.lean,Mathlib/Analysis/Normed/Group/Seminorm.lean,Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean,Mathlib/Analysis/SpecialFunctions/Log/Base.lean,Mathlib/Analysis/SpecialFunctions/PolarCoord.lean,Mathlib/CategoryTheory/SmallObject/Iteration/ExtendToSucc.lean,Mathlib/CategoryTheory/Subpresheaf/Equalizer.lean,Mathlib/Combinatorics/Additive/Corner/Roth.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/Coloring.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Girth.lean,Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Computability/AkraBazzi/GrowsPolynomially.lean,Mathlib/Computability/Partrec.lean,Mathlib/Data/ENNReal/Inv.lean,Mathlib/Data/EReal/Operations.lean,Mathlib/Data/FinEnum/Option.lean,Mathlib/Data/Finset/Lattice/Fold.lean,Mathlib/Data/Fintype/Perm.lean,Mathlib/Data/Int/WithZero.lean,Mathlib/Data/List/MinMax.lean,Mathlib/Data/Matroid/Basic.lean,Mathlib/Data/Nat/Choose/Central.lean,Mathlib/Data/Nat/Digits/Defs.lean,Mathlib/Data/Nat/Factors.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Data/Set/MemPartition.lean,Mathlib/Data/Sign.lean,Mathlib/Dynamics/TopologicalEntropy/Subset.lean,Mathlib/FieldTheory/Relrank.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/RingedSpace/Basic.lean,Mathlib/GroupTheory/Perm/Sign.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Defs.lean,Mathlib/LinearAlgebra/AffineSpace/FiniteDimensional.lean,Mathlib/LinearAlgebra/ExteriorPower/Pairing.lean,Mathlib/LinearAlgebra/Matrix/Block.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Real.lean,Mathlib/MeasureTheory/Covering/Besicovitch.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Covering/LiminfLimsup.lean,Mathlib/MeasureTheory/Covering/Vitali.lean,Mathlib/MeasureTheory/Function/AEEqFun.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Function/AEEqOfLIntegral.lean,Mathlib/MeasureTheory/Function/ConvergenceInMeasure.lean,Mathlib/MeasureTheory/Function/Jacobian.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Integral/Bochner/VitaliCaratheodory.lean 224 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
80-44080
2 months ago
80-44081
2 months ago
0-10
10 seconds
26886 pechersky
author:pechersky
feat(NumberTheory/Padics/ValuativeRel): ValuativeRel ℚ_[p] as well as instances for IsRankLeOne, IsNontrivial, IsDiscrete --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #26827 t-algebra t-analysis t-number-theory merge-conflict blocked-by-other-PR WIP
label:t-algebra$
310/25 Mathlib.lean,Mathlib/Analysis/Normed/ValuativeRel.lean,Mathlib/NumberTheory/Padics/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 4 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
80-15697
2 months ago
80-15697
2 months ago
0-1386
23 minutes
25834 Rida-Hamadani
author:Rida-Hamadani
feat(SimpleGraph): girth-diameter inequality This is a useful inequality that comes up in proofs related to Moore graphs, cages, SRGs, and so on. --- - [x] depends on: #26380 - [x] depends on: #25650 - [ ] depends on: #26614 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics blocked-by-other-PR WIP 825/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/GirthDiam.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
77-60047
2 months ago
101-13441
3 months ago
0-28
28 seconds
26973 peabrainiac
author:peabrainiac
feat(Geometry/Diffeology): diffeologies generated from sets of plots Introduces diffeologies generated from sets of plots, shows that this defines a Galois insertion, and concludes that the diffeologies on a type form a complete lattice. --- This PR continues the work from #22724. - [ ] depends on: #26484 t-differential-geometry blocked-by-other-PR 629/0 Mathlib.lean,Mathlib/Geometry/Diffeology/Basic.lean,docs/references.bib 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'peabrainiac'] nobody
77-21663
2 months ago
85-37337
2 months ago
0-785
13 minutes
27274 peabrainiac
author:peabrainiac
feat(Geometry/Diffeology): continuous diffeologies & D-topology-lemmas Introduces the continuous diffeology on topological spaces and the Galois connection between it and the D-topology, and then uses it to prove a few more lemmas about the D-topology. --- Aside from being useful for defining a right adjoint of the D-topology functor later, this is a prerequisite for correctly defining coinduced diffeologies (namely in such a way that the D-topology is defeq to the coinduced topology) and thus also for most constructions of diffeological spaces. - [ ] depends on: #26973 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry blocked-by-other-PR 766/0 Mathlib.lean,Mathlib/Geometry/Diffeology/Basic.lean,Mathlib/Geometry/Diffeology/Continuous.lean,docs/references.bib 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
77-2356
2 months ago
77-2357
2 months ago
0-1796
29 minutes
25848 joelriou
author:joelriou
feat/refactor: redefinition of homology + derived categories This PR contains a redefinition of homology, theorems about localization of categories, including triangulated categories, a construction of the derived category of an abelian category, derived functors, spectral sequences, etc. (This is made a PR only to facilitate navigation in the code of this branch.) This formalization is outlined in the paper _Formalization of derived categories in Lean/mathlib_ https://hal.science/hal-04546712 The homology of `ShortComplex C` (diagrams of two composable morphisms whose composition is zero) is developed in `Algebra.Homology.ShortComplex`. The files in that folder have been added one by one in separate PRs, and then, the current definition of `homology` has been replaced by this new definition in a refactor PR.
Homology refactor: * #4203 * #4204 * #4388 * #4609 * #4645 * #4787 * #4853 * #5250 * #5674 * #6008 * #6039 * #6089 * #6227 * #6230 * #6231 * #6245 * #6267 * #6279 * #6324 * #6443 * #6586 * #6994 * #7042 * #7047 * #7052 * #7192 * #7193 * #7194 * #7195 * #7197 * #7256 * #7262 * #7280 * #7623 * #7624 * #7806 * #7816 * #7817 * #7821 * #7954 * #7966 * #7993 * #7995 * #7996 * #7997 * #8058 * #8060 * #8069 * #8079 * #8081 * #8084 * #8091 * #8113 * #8114 * #8152 * #8159 * #8174 * #8200 * #8206 * #8208 * #8472 * #8468 * #8475 * #8490 * #8491 * #8507 * #8512 * #8593 * #8595 * #8706 * #8765 * #8766 * #8845 * #9022 * #12649 * #12638
Homological complexes: * #9333 * #9335 * #9331
Localization of categories: * #6233 * #6235 * #6236 * #6867 * #6869 * #6887 * #6882 * #8041 * #8055 * #8069 * #8516 * #8864 * #8865 * #9702 * #9692 * #10606 * #10607 * #11721 * #11728 * #11737 * #12728
Shifts on categories: * #4429 * #6652 * #6653 * #6655 * #7268 * #7270 * #9001 * #11764
Triangulated categories: * #6377 * #6688 * #6815 * #7053 * #7324 * #7327 * #7336 * #7626 * #7641 * #9049 * #9073 * #10527 * #11738 * #11740 * #11759 * #11786 * #11789 * #11805 * #12619
Construction of the derived category: * #6626 * #6701 * #6720 * #6894 * #7048 * #7049 * #7050 * #7201 * #7656 * #8937 * #8966 * #8969 * #8970 * #9054 * #9447 * #8951 * #9483 * #9508 * #9509 * #9592 * #9614 * #9615 * #9032 * #9370 * #9550 * #9686 * #9660 * #11760 * #11782 * #11806
Derived functors: * #10195 * #10270 * #10301 * #10384 * #10413 * #12168 * #12627 * #12631 * #12633 * #12785 * #12788
Refactor of Ext-groups: * #12607
- [ ] depends on: #24309 - [ ] depends on: #24275 - [x] depends on: #24191 - [ ] depends on: #23797 - [x] depends on: #22586 - [ ] depends on: #22556 - [ ] depends on: #22547 - [ ] depends on: #22539 - [ ] depends on: #22508 - [ ] depends on: #22450 - [ ] depends on: #23915 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #4197.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/4197*
large-import t-topology t-category-theory merge-conflict blocked-by-other-PR WIP 41795/490 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Free.lean,Mathlib/Algebra/Category/ModuleCat/LeftResolutions.lean,Mathlib/Algebra/Homology/Additive.lean,Mathlib/Algebra/Homology/BicomplexColumns.lean,Mathlib/Algebra/Homology/BicomplexRows.lean,Mathlib/Algebra/Homology/Bifunctor.lean,Mathlib/Algebra/Homology/BifunctorColimits.lean,Mathlib/Algebra/Homology/BifunctorCommShift.lean,Mathlib/Algebra/Homology/BifunctorFlip.lean,Mathlib/Algebra/Homology/BifunctorHomotopy.lean,Mathlib/Algebra/Homology/BifunctorMappingCone.lean,Mathlib/Algebra/Homology/BifunctorShift.lean,Mathlib/Algebra/Homology/BifunctorSingle.lean,Mathlib/Algebra/Homology/BifunctorTriangulated.lean,Mathlib/Algebra/Homology/CategoryWithHomology.lean,Mathlib/Algebra/Homology/CochainComplexMinus.lean,Mathlib/Algebra/Homology/ComplexShape.lean,Mathlib/Algebra/Homology/ComplexShapeSigns.lean,Mathlib/Algebra/Homology/ConnectShortExact.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/DerivabilityStructureInjectives.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Fractions.lean,Mathlib/Algebra/Homology/DerivedCategory/FullyFaithful.lean,Mathlib/Algebra/Homology/DerivedCategory/HomologySequence.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Minus.lean,Mathlib/Algebra/Homology/DerivedCategory/Monoidal.lean,Mathlib/Algebra/Homology/DerivedCategory/Plus.lean,Mathlib/Algebra/Homology/DerivedCategory/RightDerivedFunctorPlus.lean,Mathlib/Algebra/Homology/DerivedCategory/SingleTriangle.lean,Mathlib/Algebra/Homology/DerivedCategory/SpectralObject.lean,Mathlib/Algebra/Homology/DerivedCategory/TStructure.lean,Mathlib/Algebra/Homology/Double.lean,Mathlib/Algebra/Homology/DoubleHomology.lean,Mathlib/Algebra/Homology/Embedding/CochainComplex.lean,Mathlib/Algebra/Homology/Embedding/CochainComplexTrunc.lean,Mathlib/Algebra/Homology/Embedding/ComplementaryTrunc.lean,Mathlib/Algebra/Homology/Embedding/ExtendMap.lean,Mathlib/Algebra/Homology/Embedding/HomEquiv.lean,Mathlib/Algebra/Homology/Embedding/RestrictionHomology.lean,Mathlib/Algebra/Homology/Embedding/StupidFiltration.lean,Mathlib/Algebra/Homology/Embedding/StupidTrunc.lean,Mathlib/Algebra/Homology/Embedding/TruncGE.lean,Mathlib/Algebra/Homology/Embedding/TruncLE.lean,Mathlib/Algebra/Homology/Embedding/TruncLEHomology.lean,Mathlib/Algebra/Homology/ExactSequence.lean,Mathlib/Algebra/Homology/ExactSequenceFour.lean,Mathlib/Algebra/Homology/Factorizations/Basic.lean,Mathlib/Algebra/Homology/Factorizations/CM5a.lean,Mathlib/Algebra/Homology/Factorizations/CM5b.lean,Mathlib/Algebra/Homology/HomologicalBicomplex.lean,Mathlib/Algebra/Homology/HomologicalComplex.lean,Mathlib/Algebra/Homology/HomologicalComplexFunctorEquiv.lean,Mathlib/Algebra/Homology/HomologicalComplexLimits.lean,Mathlib/Algebra/Homology/HomologicalComplexLimitsEventuallyConstant.lean,Mathlib/Algebra/Homology/Homology.lean,Mathlib/Algebra/Homology/HomologySequence.lean,Mathlib/Algebra/Homology/HomologySequenceLemmas.lean,Mathlib/Algebra/Homology/Homotopy.lean,Mathlib/Algebra/Homology/HomotopyCategory.lean,Mathlib/Algebra/Homology/HomotopyCategory/Cylinder.lean,Mathlib/Algebra/Homology/HomotopyCategory/DegreewiseSplit.lean,Mathlib/Algebra/Homology/HomotopyCategory/Devissage.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplex.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexShift.lean,Mathlib/Algebra/Homology/HomotopyCategory/KInjective.lean,Mathlib/Algebra/Homology/HomotopyCategory/MappingCone.lean,Mathlib/Algebra/Homology/HomotopyCategory/Minus.lean,Mathlib/Algebra/Homology/HomotopyCategory/Monoidal.lean,Mathlib/Algebra/Homology/HomotopyCategory/MonoidalTriangulated.lean,Mathlib/Algebra/Homology/HomotopyCategory/Plus.lean,Mathlib/Algebra/Homology/HomotopyCategory/PreservesQuasiIso.lean,Mathlib/Algebra/Homology/HomotopyCategory/Pretriangulated.lean,Mathlib/Algebra/Homology/HomotopyCategory/Shift.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShiftSequence.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShortExact.lean,Mathlib/Algebra/Homology/HomotopyCategory/SingleFunctors.lean,Mathlib/Algebra/Homology/HomotopyCategory/SpectralObject.lean,Mathlib/Algebra/Homology/HomotopyFiber.lean,Mathlib/Algebra/Homology/LeftResolutions/Basic.lean,Mathlib/Algebra/Homology/LeftResolutions/CochainComplex.lean,Mathlib/Algebra/Homology/LeftResolutions/CochainComplexMinus.lean,Mathlib/Algebra/Homology/LeftResolutions/Reduced.lean,Mathlib/Algebra/Homology/LeftResolutions/Transport.lean,Mathlib/Algebra/Homology/Localization.lean,Mathlib/Algebra/Homology/Monoidal.lean,Mathlib/Algebra/Homology/ObjectProperty.lean,Mathlib/Algebra/Homology/PreservesQuasiIso.lean,Mathlib/Algebra/Homology/QuasiIso.lean,Mathlib/Algebra/Homology/Refinements.lean,Mathlib/Algebra/Homology/ShortComplex/Abelian.lean,Mathlib/Algebra/Homology/ShortComplex/Basic.lean,Mathlib/Algebra/Homology/ShortComplex/Exact.lean,Mathlib/Algebra/Homology/ShortComplex/FiveLemma.lean,Mathlib/Algebra/Homology/ShortComplex/FourLemma.lean,Mathlib/Algebra/Homology/ShortComplex/HomologicalComplex.lean,Mathlib/Algebra/Homology/ShortComplex/Images.lean,Mathlib/Algebra/Homology/ShortComplex/Preadditive.lean 295 n/a ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
72-43708
2 months ago
unknown
unknown
19607 madvorak
author:madvorak
Block matrix totally unimodular --- Discussion: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/TU.20block.20matrix.20.2319607 - [ ] depends on: #19323 - [ ] depends on: #20428 - [ ] depends on: #20433 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR WIP 156/0 Mathlib.lean,Mathlib/Data/Sum/Decompose.lean,Mathlib/LinearAlgebra/Matrix/Determinant/TotallyUnimodular.lean 3 11 ['github-actions', 'jcommelin', 'leanprover-community-bot-assistant', 'madvorak', 'mathlib4-dependent-issues-bot'] nobody
71-63038
2 months ago
71-63039
2 months ago
0-0
0 seconds
26987 joelriou
author:joelriou
chore: deprecating module LinearAlgebra.PiTensorProduct --- - [ ] depends on: #26464 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict blocked-by-other-PR WIP
label:t-algebra$
1209/934 Mathlib.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/SubtypeNeLift.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/TensorPower/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean,Mathlib/SetTheory/Cardinal/Finite.lean 10 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
71-61438
2 months ago
71-61438
2 months ago
0-2
2 seconds
24668 robertmaxton42
author:robertmaxton42
feat(LinearAlgebra): add inductive principle for the free product of algebras * Add `FreeProduct.inductionOn` and `.asPowers.inductionOn`. - [ ] depends on: #24532 --- * `simp↓` on `empty_rel'_bot`: the LHS is indeed not in simp-normal form, but `simp` can't solve the full lemma (if only because `Function.onFun` isn't marked `@[simp]`) and the actual simp-normal form of `rel'` isn't terribly useful for humans. Since I do expect users to type `rel' R A` by hand, I claim this use of `simp↓` is justified. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
205/9 Mathlib/LinearAlgebra/FreeProduct/Basic.lean 1 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
70-4607
2 months ago
70-4608
2 months ago
0-333
5 minutes
27025 grunweg
author:grunweg
feat: Gram-Schmidt procedure on smooth vector bundles yields smooth sections For the Gram-Schmidt process on a vector bundle, deduce that smoothness of the bundle metric implies smoothness of the resulting sections. From the path towards geodesics and the Levi-Civita connection. Co-authored-by: Patrick Massot --- A few sorries remain to prove the continuous case. - [ ] depends on: #27021 - [x] depends on: #27023 - [ ] depends on: #27024 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry blocked-by-other-PR 927/11 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Geometry/Manifold/Elaborators.lean,Mathlib/Geometry/Manifold/Traces.lean,Mathlib/Geometry/Manifold/VectorBundle/GramSchmidtOrtho.lean,scripts/noshake.json 6 5 ['faenuccio', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
65-33760
2 months ago
66-46588
2 months ago
0-316
5 minutes
27694 grunweg
author:grunweg
feat: Gram-Schmidt orthonormalisation preserves continuity of sections provided the bundle metric used in the process is continuous. From the path towards geodesics and the Levi-Civita connection. Co-authored-by: Patrick Massot [patrickmassot@free.fr](mailto:patrickmassot@free.fr) --- - [ ] depends on: #27024 - [ ] depends on: #27021 Baby version of #27025. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry blocked-by-other-PR 390/11 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Geometry/Manifold/VectorBundle/GramSchmidtOrtho.lean,scripts/noshake.json 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
65-33031
2 months ago
65-33031
2 months ago
0-696
11 minutes
10006 jstoobysmith
author:jstoobysmith
feat(AlgebraicTopology): homotopy in quasicategories Defined a homotopy between two 1-simplicies in a quasicategories, and proved the property of being homotopic forms an equivalence relation. --- - [ ] depends on: #9935 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology new-contributor merge-conflict awaiting-author blocked-by-other-PR 898/1 Mathlib.lean,Mathlib/AlgebraicTopology/Homotopy.lean,Mathlib/AlgebraicTopology/SimplexCategory.lean,Mathlib/AlgebraicTopology/SimplicialSet.lean 4 3 ['joelriou', 'leanprover-community-mathlib4-bot'] nobody
64-54513
2 months ago
64-54513
2 months ago
0-0
0 seconds
25740 robin-carlier
author:robin-carlier
feat(AlgebraicTopology/SimplexCategory/GeneratorsRelations): `SimplexCategoryGenRel.toSimplexCategory` is an equivalence We use the normal forms for morphisms in `SimplexCategoryGenRel` to prove that `SimplexCategoryGenRel.toSimplexCategory` is an equivalence. We prove in order that there exists unique lifts in `SimplexCategoryGenRel` of mono (resp. epis) in `SimplexCategory`, and use this to deduce fully faithfulness of `SimplexCategoryGenRel.toSimplexCategory` thanks to the existing epi-mono factorisation in `SimplexCategory`. Part of a series of PR formalising that `SimplexCategoryGenRel` is equivalent to `SimplexCategory`. --- - [ ] depends on: #25737 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #21747.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/21747* t-algebraic-topology large-import blocked-by-other-PR 942/9 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/Equivalence.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
64-54472
2 months ago
64-54473
2 months ago
0-2
2 seconds
26399 ChrisHughes24
author:ChrisHughes24
refactor(ModelTheory): tidy up proof of Ax-Grothendieck with definable functions I migrated this PR by hand instead of using the script. --- - [x] depends on: #20166 - [x] depends on: #20161 - [x] depends on: #20115 - [x] depends on: #20174 - [x] depends on: #20175 - [x] depends on: #20180 - [x] depends on: #21948 - [ ] depends on: #26398 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic blocked-by-other-PR 639/60 Mathlib.lean,Mathlib/FieldTheory/AxGrothendieck.lean,Mathlib/ModelTheory/FunctionalFormula.lean 3 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
63-48714
2 months ago
63-48787
2 months ago
0-2300
38 minutes
20008 FLDutchmann
author:FLDutchmann
feat(NumberTheory): Selberg sieve This PR is a working draft of the full proof of the fundamental theorem of the Selberg sieve. I will create dependent PRs as I clean up the code. This work was used in the first proof of the prime number theorem in PNT+. --- - [x] depends on: #20025 - [x] depends on: #20026 - [x] depends on: #20779 - [x] depends on: #21880 - [ ] depends on: #27702 - [ ] depends on: #27707 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis t-number-theory merge-conflict awaiting-author blocked-by-other-PR 937/0 Mathlib/NumberTheory/SelbergSieve/Basic.lean,Mathlib/NumberTheory/SelbergSieve/Selberg.lean,docs/references.bib 3 3 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
63-40020
2 months ago
63-40021
2 months ago
0-0
0 seconds
25486 VTrelat
author:VTrelat
feat(SetTheory/ZFC/Integers): define integers in ZFC Extend the model of ZFC with integers following the converse direction as for naturals. We first define a type and then build a set. We finally show that both representations have coercions in both direction: - define a proper type `ZFInt` representing integers based on `ZFNat × ZFNat` and following the usual construction of integers - add theorems on usual algebraic properties of integers - define a set `Int` and show that it matches-i.e. that it is isomorphic to-the type `ZFInt` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #25483 - [ ] depends on: #25485 t-set-theory new-contributor merge-conflict blocked-by-other-PR 2003/0 Mathlib/Data/Set/Prod.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Booleans.lean,Mathlib/SetTheory/ZFC/Integers.lean 4 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
60-61077
1 month ago
60-61077
1 month ago
0-2067
34 minutes
25484 VTrelat
author:VTrelat
feat(SetTheory/ZFC/Booleans): define Boolean algebra in ZFC Extend the model of ZFC with Boolean algebra: - define a set 𝔹 of booleans - define a proper type `ZFBool` representing booleans - add theorems on usual algebraic properties of booleans - provide usual boolean notations like `⊤`, `⊥`, `∧`, `∨`, etc. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #25483 t-set-theory new-contributor merge-conflict blocked-by-other-PR 619/0 Mathlib/Data/Set/Prod.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Booleans.lean 3 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
60-61068
1 month ago
60-61068
1 month ago
0-1523
25 minutes
25427 Paul-Lez
author:Paul-Lez
feat(Analysis/Calculus/PartialDerivatives): Propose notation for partial derivatives. This PR introduces a notation for partial derivatives, taken with respect to a canonical basis. The idea here is that this might be useful for e.g. writing down PDEs. The notation allows use to write things like ```lean -- The canonical basis for `ℝ × ℝ` is indexed by `Fin 0` so `∂₀[ℝ]` corresponds to taking -- the first partial derivative example : (∂₀[ℝ] fun (x : ℝ × ℝ) => x.1) 0 = 1 := by simp [Pi.zero_def, lineDeriv] ``` This has already been discussed on Zulip [here](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Partial.20derivatives). I've opened this PR as a draft in order to get preliminary feedback on the contents (e.g. is this appropriate for Mathlib?); the file contains some demos of the notation in action. Co-authored-by: Eric Wieser --- - [ ] depends on: #25425 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict blocked-by-other-PR 195/0 Mathlib.lean,Mathlib/Analysis/Calculus/PartialDerivatives/Notation.lean,Mathlib/LinearAlgebra/Basis/HasCanonicalBasis.lean 3 16 ['Paul-Lez', 'github-actions', 'leanprover-community-bot-assistant', 'lecopivo', 'mathlib4-dependent-issues-bot', 'ocfnash'] nobody
60-61058
1 month ago
60-61058
1 month ago
0-0
0 seconds
25143 chrisflav
author:chrisflav
feat(RingTheory): smooth algebras have smooth Noetherian models Co-authored by: Judith Ludwig --- - [ ] depends on: #24794 - [ ] depends on: #25138 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict blocked-by-other-PR 596/45 Mathlib.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Tower.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Eval.lean,Mathlib/RingTheory/AlgebraicIndependent/Transcendental.lean,Mathlib/RingTheory/Extension/Presentation/Basic.lean,Mathlib/RingTheory/Extension/Presentation/Core.lean,Mathlib/RingTheory/FinitePresentation.lean,Mathlib/RingTheory/FiniteType.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,Mathlib/RingTheory/Smooth/Basic.lean,Mathlib/RingTheory/Smooth/Kaehler.lean,Mathlib/RingTheory/Smooth/NoetherianDescent.lean,Mathlib/RingTheory/Spectrum/Prime/ChevalleyComplexity.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean,Mathlib/RingTheory/Unramified/Basic.lean 21 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
59-63251
1 month ago
59-63251
1 month ago
0-713
11 minutes
22909 AntoineChambert-Loir
author:AntoineChambert-Loir
feat(RingTheory/Pure): pure submodules A submodule `N` of an `R`-module is *pure* if all maps `S ⊗[R] N → S ⊗[R] M` deduced by base change from the injection of `N` into `M` are injective, for all `R`-algebras `S`. This is expressed by the class `Submodule.IsPure`. For type theoretic reason, the definition of `Submodule.IsPure` only considers algebras `S` in the same universe as `R`, but `Submodule.IsPure.baseChange_injective` establishes the property for all universes. * `Submodule.IsComplemented.isPure` : a complemented submodule is pure. Co-authored with @mariainesdff --- - [ ] depends on: #22898 - [ ] depends on: #22908 - [x] depends on: #22911 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict blocked-by-other-PR 592/3 Mathlib.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/RingTheory/Adjoin/FG.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/Finiteness/Cardinality.lean,Mathlib/RingTheory/Finiteness/Small.lean,Mathlib/RingTheory/Pure.lean,Mathlib/RingTheory/Spectrum/Prime/RingHom.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/DirectLimit/FG.lean,Mathlib/RingTheory/TensorProduct/DirectLimit/Small.lean 11 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
59-63185
1 month ago
59-63185
1 month ago
0-1047
17 minutes
22908 AntoineChambert-Loir
author:AntoineChambert-Loir
feat(RingTheory/Finiteness/Small): tensor product of the system of small submodules The directed limit of a tensor product for the directed system of small submodules. Co-authored with @mariainesdff --- - [ ] depends on: #22898 - [x] depends on: #22911 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict blocked-by-other-PR 624/2 Mathlib.lean,Mathlib/RingTheory/Adjoin/FG.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/Finiteness/Cardinality.lean,Mathlib/RingTheory/Finiteness/Small.lean,Mathlib/RingTheory/Spectrum/Prime/RingHom.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/DirectLimit/FG.lean,Mathlib/RingTheory/TensorProduct/DirectLimit/Small.lean 9 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
59-63137
1 month ago
59-63137
1 month ago
0-3552
59 minutes
26377 Whysoserioushah
author:Whysoserioushah
feat(Mathlib/RingTheory/SimpleRing/TensorProduct): Tensor product of a simple algebra and a central simple algebra is simple co-authored-by: @jjaassoonn --- - [ ] depends on: #26368 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict blocked-by-other-PR 423/0 Mathlib.lean,Mathlib/RingTheory/SimpleRing/TensorProduct.lean,Mathlib/RingTheory/TwoSidedIdeal/SpanAsSum.lean 3 15 ['Whysoserioushah', 'eric-wieser', 'github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
59-50540
1 month ago
59-50541
1 month ago
0-2337
38 minutes
14089 callesonne
author:callesonne
feat(Bicategory/Functorbicategory): define bicategory of pseudofunctors This PR contains a definition of the bicategory of pseudofunctors, in the file `Bicategory/FunctorBicategory/Pseudo.lean`. It also moves the file `Bicategory/Functorbicategory.lean` to `Bicategory/FunctorBicategory/Oplax.lean`. --- - [x] depends on: #14028 - [x] depends on: #18250 - [x] depends on: #18252 - [x] depends on: #18253 - [ ] depends on: #18254 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict blocked-by-other-PR 385/70 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/FunctorBicategory/Oplax.lean,Mathlib/CategoryTheory/Bicategory/FunctorBicategory/Pseudo.lean,Mathlib/CategoryTheory/Bicategory/Modification/Oplax.lean,Mathlib/CategoryTheory/Bicategory/Modification/Pseudo.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Oplax.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Pseudo.lean 7 6 ['callesonne', 'github-actions', 'leanprover-community-bot-assistant', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] nobody
59-9033
1 month ago
59-9034
1 month ago
9-2320
9 days
25825 yuma-mizuno
author:yuma-mizuno
feat(CategoryTheory/Bicategory): define lax transformations between oplax functors and also define oplax transformations between lax functors. - [ ] depends on: #25779 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #25672.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/25672* large-import t-category-theory blocked-by-other-PR 431/10 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Lax.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Oplax.lean,scripts/noshake.json 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
57-61481
1 month ago
57-61500
1 month ago
0-1
1 second
28152 Sebi-Kumar
author:Sebi-Kumar
feat(AlgebraicTopology): characterize simply connectedness in terms of loops Show that a space is simply connected if and only if all loops within that space are homotopic to the constant loop. To be used in a proof that the `n`-sphere is simply connected for `n > 1`. --- This code was written at the University of Western Ontario as a part of the Fields Undergraduate Summer Research Program under the supervision of Chris Kapulkin and Daniel Carranza. - [ ] depends on: #28126 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology new-contributor blocked-by-other-PR 37/5 Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
55-41214
1 month ago
55-41215
1 month ago
0-2854
47 minutes
28208 Sebi-Kumar
author:Sebi-Kumar
feat(Topology): add the definition `foldTrans` to concatenate finite sequences of paths Add `foldTrans`, which folds the function `Path.trans` across a sequence of paths with compatible endpoints, corresponding to the concatenation of a finite sequence of paths. This is implemented with `Fin.dfoldl` from the Batteries library. Prove basic properties about `foldTrans` (i.e., how it behaves with respect to `Path.refl`, `Path.subpath`, and homotopies). --- To provide additional context, I am new to contributing to Mathlib, and I am doing so as a part of the Fields Undergraduate Summer Research Program at the University of Western Ontario under the supervision of Chris Kapulkin and Daniel Carranza. My goal is to prove that the `n`-sphere is simply connected for `n > 1`, following the proof from Hatcher's "Algebraic Topology." - [ ] depends on: #27261 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology blocked-by-other-PR 259/0 Mathlib.lean,Mathlib/Topology/FoldTrans.lean,Mathlib/Topology/Subpath.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
54-10854
1 month ago
54-10855
1 month ago
0-2340
39 minutes
27100 staroperator
author:staroperator
feat(ModelTheory): Presburger definability and semilinear sets This PR defines [semilinear sets](https://en.wikipedia.org/wiki/Semilinear_set) and formalizes their equivalence with Presburger definabilty. As an application of this result, we prove that the graph of multiplication is not Presburger definable in ℕ. --- - [x] depends on: #26896 - [x] depends on: #27081 - [x] depends on: #27087 - [ ] depends on: #27789 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic merge-conflict blocked-by-other-PR 1667/7 Mathlib.lean,Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/Algebra/Module/Submodule/Defs.lean,Mathlib/GroupTheory/Finiteness.lean,Mathlib/LinearAlgebra/LinearIndependent/Defs.lean,Mathlib/ModelTheory/Arithmetic/Presburger/Definability.lean,Mathlib/ModelTheory/Arithmetic/Presburger/Semilinear/Basic.lean,Mathlib/ModelTheory/Arithmetic/Presburger/Semilinear/Defs.lean,Mathlib/ModelTheory/Arithmetic/Presburger/Semilinear/Nat.lean,Mathlib/Order/WellFoundedSet.lean,Mathlib/RingTheory/Finiteness/Cardinality.lean,docs/references.bib 12 6 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
53-54048
1 month ago
53-54049
1 month ago
0-1811
30 minutes
27626 EtienneC30
author:EtienneC30
chore: turn covarianceBilin into a ContinuousBilinForm From BrownianMotion --- - [ ] depends on: #26315 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-measure-probability merge-conflict blocked-by-other-PR 275/2 Mathlib.lean,Mathlib/Analysis/NormedSpace/ContinuousBilinForm.lean,Mathlib/LinearAlgebra/BilinearForm/IsPosSemidef.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Hermitian.lean,Mathlib/Probability/Moments/CovarianceBilin.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
52-80926
1 month ago
52-80926
1 month ago
0-384
6 minutes
27645 bjornsolheim
author:bjornsolheim
feat(Geometry/Convex/Cone): add pointed cone tensor products Define the minimal and maximal tensor product of pointed cones. Prove that the minimal tensor product is less than or equal to the maximal tensor product. --- - [ ] depends on: #25292 - [ ] depends on: #27578 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry new-contributor blocked-by-other-PR 316/0 Mathlib.lean,Mathlib/Geometry/Convex/Cone/ConicalHull.lean,Mathlib/Geometry/Convex/Cone/TensorProduct.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
52-25397
1 month ago
52-29046
1 month ago
0-1828
30 minutes
28328 pechersky
author:pechersky
chore(Topology/Valued): golf using local finite order of WithZeroTopology have to juggle in a version of `mrangeRestrict` which works on valuations, and also juggle the scoped topology over the subtype topology --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #28325 large-import t-algebra t-topology t-number-theory blocked-by-other-PR
label:t-algebra$
187/88 Mathlib/Topology/Algebra/GroupWithZero.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean,Mathlib/Topology/Compactness/Compact.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
51-75061
1 month ago
51-75062
1 month ago
0-1600
26 minutes
23915 joelriou
author:joelriou
feat(CategoryTheory): deriving functors using a right derivability structure We develop the API for derived functors following the existence theorem obtained in #26374. If `Φ` is a localizer morphism, we introduce a predicate `Φ.Derives F` for a functor `F` saying that `Φ.functor ⋙ F` inverts the given class of morphisms, and in case `Φ` is a right derivability structure, we show that `F` admits a right derived functor, and we obtain a recognition lemma for this derived functor. (In the future, this will be applied to the injective/projective/flat derivability structures.) --- - [ ] depends on: #26374 - [ ] depends on: #22474 - [ ] depends on: #26036 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict blocked-by-other-PR WIP 599/10 Mathlib.lean,Mathlib/CategoryTheory/Functor/Derived/PointwiseRightDerived.lean,Mathlib/CategoryTheory/Functor/Derived/RightDerived.lean,Mathlib/CategoryTheory/Functor/KanExtension/Pointwise.lean,Mathlib/CategoryTheory/Iso.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Limits/HasLimits.lean,Mathlib/CategoryTheory/Limits/Opposites.lean,Mathlib/CategoryTheory/Limits/Shapes/Products.lean,Mathlib/CategoryTheory/Localization/DerivabilityStructure/Basic.lean,Mathlib/CategoryTheory/Localization/DerivabilityStructure/Derives.lean,Mathlib/CategoryTheory/Localization/DerivabilityStructure/PointwiseRightDerived.lean 12 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
51-54355
1 month ago
145-22879
4 months ago
0-0
0 seconds
27897 grunweg
author:grunweg
feat: check indentation of doc-strings Likely will require further adaptations to mathlib. May land piece-wise. But at first, let's see how big the overall fallout actually is. (So far: 100 lines of implementation and tests, and 170 lines of fix-ups; which are probably mostly complete, but not entirely.) --- - [ ] depends on: #27898 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter awaiting-CI merge-conflict blocked-by-other-PR 339/20 Mathlib/Algebra/Order/Hom/Basic.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Polynomial/Inductions.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Oplax.lean,Mathlib/CategoryTheory/ConcreteCategory/Basic.lean,Mathlib/CategoryTheory/Enriched/Opposite.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/Limits.lean,Mathlib/CategoryTheory/NatIso.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Finsupp/MonomialOrder.lean,Mathlib/Data/Finsupp/MonomialOrder/DegLex.lean,Mathlib/Data/List/EditDistance/Defs.lean,Mathlib/Data/PNat/Xgcd.lean,Mathlib/Data/Part.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/Order/Filter/Partial.lean,Mathlib/Order/Interval/Finset/Defs.lean,Mathlib/RingTheory/DividedPowers/Basic.lean,Mathlib/Tactic/ComputeDegree.lean,Mathlib/Tactic/FunProp/Decl.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/FunProp/Types.lean,Mathlib/Tactic/Linter/DocString.lean,Mathlib/Tactic/MinImports.lean,Mathlib/Tactic/MoveAdd.lean,Mathlib/Tactic/RewriteSearch.lean,Mathlib/Tactic/ToAdditive/Frontend.lean,MathlibTest/DocString.lean,MathlibTest/slow_simp.lean 37 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
50-75443
1 month ago
50-75444
1 month ago
0-1
1 second
27996 grunweg
author:grunweg
feat: check indentation in doc-strings, medium version --- - [ ] depends on: #27898 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR WIP 816/505 Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/ContinuedFractions/Basic.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Group/Subgroup/Finite.lean,Mathlib/Algebra/Lie/Classical.lean,Mathlib/Algebra/Lie/OfAssociative.lean,Mathlib/Algebra/Module/LinearMap/Polynomial.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Algebra/Order/Hom/Basic.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Polynomial/Inductions.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/CategoryTheory/Abelian/Basic.lean,Mathlib/CategoryTheory/Adjunction/AdjointFunctorTheorems.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Oplax.lean,Mathlib/CategoryTheory/Comma/Arrow.lean,Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/CategoryTheory/ConcreteCategory/Basic.lean,Mathlib/CategoryTheory/Enriched/Opposite.lean,Mathlib/CategoryTheory/EpiMono.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/EssentialImage.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Generator/Basic.lean,Mathlib/CategoryTheory/Limits/ConeCategory.lean,Mathlib/CategoryTheory/Limits/Filtered.lean,Mathlib/CategoryTheory/Limits/FullSubcategory.lean,Mathlib/CategoryTheory/Limits/HasLimits.lean,Mathlib/CategoryTheory/Limits/Over.lean,Mathlib/CategoryTheory/Limits/Shapes/IsTerminal.lean,Mathlib/CategoryTheory/Limits/Shapes/WideEqualizers.lean,Mathlib/CategoryTheory/Limits/Types/Yoneda.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/Limits.lean,Mathlib/CategoryTheory/NatIso.lean,Mathlib/CategoryTheory/ObjectProperty/FullSubcategory.lean,Mathlib/CategoryTheory/Sites/Grothendieck.lean,Mathlib/CategoryTheory/Sites/Pretopology.lean,Mathlib/CategoryTheory/Sites/Sheaf.lean,Mathlib/CategoryTheory/Sites/Sieves.lean,Mathlib/CategoryTheory/Subobject/Comma.lean,Mathlib/CategoryTheory/Thin.lean,Mathlib/CategoryTheory/Yoneda.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Combinatorics/Quiver/Symmetric.lean,Mathlib/Condensed/Equivalence.lean,Mathlib/Data/Bracket.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Finset/NatAntidiagonal.lean,Mathlib/Data/Finsupp/MonomialOrder.lean,Mathlib/Data/Finsupp/MonomialOrder/DegLex.lean,Mathlib/Data/List/Defs.lean,Mathlib/Data/List/EditDistance/Defs.lean,Mathlib/Data/List/Rotate.lean,Mathlib/Data/Matrix/Composition.lean,Mathlib/Data/Multiset/Antidiagonal.lean,Mathlib/Data/Multiset/NatAntidiagonal.lean,Mathlib/Data/Num/Basic.lean,Mathlib/Data/Num/Bitwise.lean,Mathlib/Data/Ordmap/Ordnode.lean,Mathlib/Data/PNat/Xgcd.lean,Mathlib/Data/Part.lean,Mathlib/Data/Vector/Basic.lean,Mathlib/Data/Vector/Defs.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/RingedSpace/PresheafedSpace/Gluing.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/LinearAlgebra/Finsupp/LinearCombination.lean,Mathlib/LinearAlgebra/InvariantBasisNumber.lean,Mathlib/LinearAlgebra/LinearIndependent/Basic.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Group/Action.lean,Mathlib/NumberTheory/FLT/Basic.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/Order/Filter/Partial.lean,Mathlib/Order/Interval/Finset/Defs.lean,Mathlib/RingTheory/DividedPowers/Basic.lean,Mathlib/RingTheory/Ideal/Maximal.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Prod.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Localization/Defs.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Ordinal/Family.lean,Mathlib/SetTheory/Ordinal/FixedPoint.lean,Mathlib/Tactic/Algebraize.lean,Mathlib/Tactic/Bound/Attribute.lean,Mathlib/Tactic/ComputeDegree.lean,Mathlib/Tactic/FunProp/Decl.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/FunProp/Types.lean,Mathlib/Tactic/Linter/DocString.lean,Mathlib/Tactic/MinImports.lean,Mathlib/Tactic/MoveAdd.lean,Mathlib/Tactic/RewriteSearch.lean 107 6 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
50-75318
1 month ago
50-75319
1 month ago
0-1
1 second
7873 astrainfinita
author:astrainfinita
perf: reorder `extends` and change instance priority in algebra hierarchy There are no strict rules, but in general `Cancel` is dropped first, then `Comm`, then `Neg / Inv`, then `Assoc`. Not sure if there's a better way. --- - [ ] depends on: #14712 - [x] depends on: #16638 - [ ] depends on: #18464 - [ ] depends on: #18468 - [ ] depends on: #18470 - [ ] depends on: #18472 - [ ] depends on: #18474 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) slow-typeclass-synthesis t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
494/204 Archive/Imo/Imo1998Q2.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Associated.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Limits.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/EuclideanDomain/Field.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/Field/IsField.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/InjSurj.lean,Mathlib/Algebra/GroupWithZero/Prod.lean,Mathlib/Algebra/GroupWithZero/Semiconj.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/Homology/HomotopyCategory/DegreewiseSplit.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShiftSequence.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Grading.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/Field/Canonical/Defs.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/BooleanRing.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/Ring/InjSurj.lean,Mathlib/Algebra/Ring/Rat.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/InnerProductSpace/Orientation.lean,Mathlib/Analysis/InnerProductSpace/Symmetric.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/NormedSpace/Star/Multiplier.lean,Mathlib/CategoryTheory/Preadditive/FunctorCategory.lean,Mathlib/CategoryTheory/Preadditive/SingleObj.lean,Mathlib/CategoryTheory/Triangulated/Functor.lean,Mathlib/Data/Finset/NoncommProd.lean,Mathlib/Data/Int/Cast/Defs.lean,Mathlib/Data/Nat/Cast/Defs.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/Data/Num/Lemmas.lean,Mathlib/Data/Rat/Denumerable.lean,Mathlib/Data/Real/ENatENNReal.lean,Mathlib/Dynamics/Ergodic/AddCircle.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/MonoidLocalization.lean,Mathlib/GroupTheory/SpecificGroups/Alternating.lean,Mathlib/GroupTheory/Torsion.lean,Mathlib/Init/ZeroOne.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/Orientation.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/TensorPower.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/External.lean,Mathlib/MeasureTheory/Decomposition/Jordan.lean,Mathlib/MeasureTheory/Decomposition/SignedLebesgue.lean,Mathlib/NumberTheory/ArithmeticFunction.lean,Mathlib/NumberTheory/LegendreSymbol/GaussEisensteinLemmas.lean,Mathlib/NumberTheory/RamificationInertia.lean,Mathlib/NumberTheory/WellApproximable.lean,Mathlib/NumberTheory/Zsqrtd/QuadraticReciprocity.lean,Mathlib/Order/Filter/Germ.lean,Mathlib/Order/Interval/Finset/Box.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/Coalgebra/Hom.lean,Mathlib/RingTheory/DiscreteValuationRing/Basic.lean,Mathlib/RingTheory/Filtration.lean,Mathlib/RingTheory/Henselian.lean,Mathlib/RingTheory/Ideal/IsPrincipal.lean,Mathlib/RingTheory/Ideal/LocalRing.lean,Mathlib/RingTheory/Ideal/Norm.lean,Mathlib/RingTheory/Localization/Integral.lean,Mathlib/RingTheory/MvPolynomial/Symmetric.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean,Mathlib/RingTheory/UniqueFactorizationDomain.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/Tactic/Positivity/Core.lean 104 84 ['MichaelStollBayreuth', 'astrainfinita', 'github-actions', 'kim-em', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mattrobball'] nobody
49-36898
1 month ago
445-8451
1 year ago
7-77799
7 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 new-contributor t-combinatorics blocked-by-other-PR 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 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
48-16658
1 month ago
48-23235
1 month ago
0-591
9 minutes
27557 chrisflav
author:chrisflav
feat(RingTheory/KrullDimension): dimension of `R / (x)` for a nonzerodivisor We show that if `R` is Noetherian and `x` is a nonzerodivisor contained in the Jacobson radical of `R`, then `dim R / (x) + 1 = dim R`. --- - [ ] depends on: #27538 - [ ] depends on: #27510 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import merge-conflict blocked-by-other-PR 509/1 Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Order/KrullDimension.lean,Mathlib/RingTheory/Ideal/GoingDown.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Basic.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/KrullDimension/Basic.lean,Mathlib/RingTheory/KrullDimension/NonZeroDivisors.lean,Mathlib/RingTheory/KrullDimension/PID.lean,Mathlib/RingTheory/Localization/AtPrime.lean,Mathlib/RingTheory/Spectrum/Prime/RingHom.lean 17 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
46-56375
1 month ago
60-34508
1 month ago
0-562
9 minutes
27542 chrisflav
author:chrisflav
feat(RingTheory/KrullDimension): dimension of polynomial ring We show that for a Noetherian ring `R`, `dim R[X] = dim R + 1`. Co-authored by: Sihan Su Co-authored by: Yi Song --- - [ ] depends on: #27520 - [ ] depends on: #27538 - [ ] depends on: #27510 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import merge-conflict blocked-by-other-PR 474/3 Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Order/KrullDimension.lean,Mathlib/RingTheory/Ideal/GoingDown.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Basic.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/KrullDimension/Basic.lean,Mathlib/RingTheory/KrullDimension/PID.lean,Mathlib/RingTheory/KrullDimension/Polynomial.lean,Mathlib/RingTheory/Localization/AtPrime/Basic.lean,Mathlib/RingTheory/Spectrum/Prime/RingHom.lean 17 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
46-56374
1 month ago
unknown
unknown
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 new-contributor t-logic merge-conflict awaiting-author blocked-by-other-PR 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
45-78101
1 month ago
45-78102
1 month ago
0-35689
9 hours
27198 robin-carlier
author:robin-carlier
feat(CategoryTheory/Monoidal/DayConvolution): the Yoneda embedding is monoidal (for Day convolution) We show that the Yoneda embedding is monoidal when we interpret its target category as Day presheaves (i.e presheaves with the Day convolution monoidal structure). The actual way we prove it is by registering a `LawfulDayConvolutionMonoidalCategoryStruct Cᵒᵖ (Type v₁) C`, for which the "interpretation" functor `C ⥤ Cᵒᵖ ⥤ Type v₁` is the Yoneda embedding. This allows to state a result independently of any size constraint on `C`. Then, we specialize to the case of a small category `C`, in this case, using the fact that the relevant colimit of preseaves exist, we use the fact that the interpretation functor induces a monoidal functor to put a `Monoidal` instance on the functor `dayYoneda : C ⥤ (Cᵒᵖ ⊛⥤ Type v₁) := yoneda ⋙ (equiv Cᵒᵖ _).inverse`. --- I was unsure about which form of simp lemmas we want for characterization of the monoidal structure on `dayYoneda`. I opted for making the "fully applied" lemmas simp, but still leaves the "unapplied" ones as non-simp just in case. - [ ] depends on: #27175 - [ ] depends on: #25732 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-category-theory merge-conflict blocked-by-other-PR 1847/26 Mathlib.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/DayFunctor.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Types.lean,Mathlib/CategoryTheory/Monoidal/Internal/Limits.lean,Mathlib/CategoryTheory/Monoidal/Limits/Basic.lean,Mathlib/CategoryTheory/Monoidal/Limits/Preserves.lean 8 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
44-76634
1 month ago
44-76634
1 month ago
0-21
21 seconds
23831 vasnesterov
author:vasnesterov
feat(Analysis): binomial series convergence Prove * `one_add_cpow_hasFPowerSeriesOnBall_zero`: for complex `a` and `|x| < 1`, the binomial series converges to `(1 + x).cpow a`. * `one_add_rpow_hasFPowerSeriesOnBall_zero`: the variant of the above for reals. --- - [x] depends on: #27537 - [ ] depends on: #26267 - [x] depends on: #26268 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict blocked-by-other-PR 606/6 Mathlib.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/Binomial.lean,Mathlib/Analysis/Analytic/ChangeOrigin.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Defs.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Lemmas.lean,Mathlib/Analysis/NormedSpace/Connected.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/Basic.lean,Mathlib/RingTheory/Binomial.lean,scripts/noshake.json 12 2 ['leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
44-62598
1 month ago
178-44416
5 months ago
0-822
13 minutes
26719 AntoineChambert-Loir
author:AntoineChambert-Loir
feat(RingTheory/PolynomialLaw/Basic): extends polynomial laws to arbitrary universes The definition of polynomial laws restricts its operations to a fixed universe. This PR constructs the extension to any universe. This is part of the project of studying divided powers on rings, in particular, for studying the universal divided power algebra of a module. Co-authored-by: María-Inés de Frutos Fernández @mariainesdff --- - [x] depends on: #26717 - [ ] depends on: #26277 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import blocked-by-other-PR 969/7 Mathlib.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean,Mathlib/RingTheory/Congruence/Basic.lean,Mathlib/RingTheory/Congruence/Defs.lean,Mathlib/RingTheory/Congruence/Hom.lean,Mathlib/RingTheory/PolynomialLaw/Basic.lean 8 4 ['acmepjz', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
44-59904
1 month ago
59-63554
1 month ago
0-1757
29 minutes
28499 yoh-tanimoto
author:yoh-tanimoto
feat(MeasureTheory/VectorMeasure): add integral of a vector-valued function against a vector measure add `VectorMeasureWithPairing.integral` for normed vector spaces `E`, `F`, a Banach space `G` , a continuous linear pairing `B : E →L[ℝ] F →L[ℝ] → G` and an `F`-valued vector measure `μ`, which should be informally written as `∫ B (f x) ∂μ x`. motivation: there are natural vector measures such as signed measures and complex measures, and their integrals appear naturally e.g. in a proof of the spectral theorem for general bounded normal operators on a Hilbert space. - [ ] depends on: #26160 for the definition and lemmas about the total variation of a vector measure. t-measure-probability blocked-by-other-PR 651/0 Mathlib.lean,Mathlib/MeasureTheory/VectorMeasure/Integral.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Lemmas.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
44-51615
1 month ago
49-12432
1 month ago
0-3692
1 hour
18805 astrainfinita
author:astrainfinita
refactor: deprecate `SemilinearMapClass` --- I'm not sure if we want to do this, but let's see if we can get a speed up from it first. - [ ] depends on: #18755 - [ ] depends on: #18756 - [ ] depends on: #18806 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-bench t-algebra merge-conflict blocked-by-other-PR WIP
label:t-algebra$
546/318 Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/Rat.lean,Mathlib/Algebra/BigOperators/Balance.lean,Mathlib/Algebra/BigOperators/Expect.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Units/Equiv.lean,Mathlib/Algebra/GroupWithZero/Hom.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LinearMap/Rat.lean,Mathlib/Algebra/Module/LocalizedModule/Int.lean,Mathlib/Algebra/Module/Submodule/EqLocus.lean,Mathlib/Algebra/Module/Submodule/Equiv.lean,Mathlib/Algebra/Module/Submodule/Ker.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Module/Submodule/Range.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Prime/Lemmas.lean,Mathlib/Algebra/Ring/Divisibility/Basic.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/LocallyConvex/WeakOperatorTopology.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/Analysis/Normed/Operator/LinearIsometry.lean,Mathlib/CategoryTheory/Limits/ConcreteCategory/WithAlgebraicStructures.lean,Mathlib/Combinatorics/Additive/FreimanHom.lean,Mathlib/Data/Complex/BigOperators.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/FieldTheory/SplittingField/Construction.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/GroupTheory/GroupAction/Hom.lean,Mathlib/LinearAlgebra/Ray.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/RingTheory/Bialgebra/Equiv.lean,Mathlib/RingTheory/Flat/Basic.lean,Mathlib/RingTheory/HahnSeries/Addition.lean,Mathlib/RingTheory/Ideal/Norm.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/RingTheory/Polynomial/Opposites.lean,Mathlib/RingTheory/RootsOfUnity/Basic.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean,Mathlib/Topology/Algebra/Module/Basic.lean,Mathlib/Topology/Algebra/Module/CharacterSpace.lean,Mathlib/Topology/Algebra/Module/FiniteDimension.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,Mathlib/Topology/Algebra/MulAction.lean,Mathlib/Topology/Homeomorph.lean,Mathlib/Topology/MetricSpace/Isometry.lean,scripts/no_lints_prime_decls.txt 55 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
43-43536
1 month ago
324-48205
10 months ago
0-0
0 seconds
25797 dagurtomas
author:dagurtomas
feat(Condensed): closed symmetric monoidal structure on light condensed modules --- - [ ] depends on: #25794 - [x] depends on: #24490 - [x] depends on: #24522 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24523.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24523* t-condensed merge-conflict blocked-by-other-PR WIP 906/427 Mathlib.lean,Mathlib/CategoryTheory/Localization/Monoidal.lean,Mathlib/CategoryTheory/Localization/Monoidal/Basic.lean,Mathlib/CategoryTheory/Localization/Monoidal/Braided.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Braided/Transport.lean,Mathlib/CategoryTheory/Sites/Monoidal.lean,Mathlib/Condensed/Light/Monoidal.lean,Mathlib/Condensed/Light/Small.lean 9 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
43-35834
1 month ago
43-35835
1 month ago
0-3
3 seconds
19582 yu-yama
author:yu-yama
feat(GroupExtension/Abelian): define `OfMulDistribMulAction.equivH2` Mainly defines: - `structure GroupExtension.OfMulDistribMulAction N G [MulDistribMulAction G N]`: group extensions of `G` by `N` where the multiplicative action of `G` on `N` is the conjugation - `structure GroupExtension.OfMulDistribMulActionWithSection N G [MulDistribMulAction G N]`: group extensions with specific choices of sections - `def GroupExtension.OfMulDistribMulAction.equivH2`: a bijection between the equivalence classes of group extensions and $H^2 (G, N)$ --- - [x] depends on: #20802 (split PR: contains changes to the `Defs` file) - [x] depends on: #20998 (split PR: mainly adds the `Basic` file) - [ ] depends on: #26670 (split PR: adds the first part of the `Abelian` file) Here is a relevant TODO in Mathlib: https://github.com/leanprover-community/mathlib4/blob/4e9fa40d7c480937e09cd6e47a591bd6f3b8be42/Mathlib/RepresentationTheory/GroupCohomology/LowDegree.lean#L46-L48 I would appreciate your comments. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra merge-conflict blocked-by-other-PR
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
43-28209
1 month ago
43-28210
1 month ago
43-26015
43 days
28246 Sebi-Kumar
author:Sebi-Kumar
feat(AlgebraicTopology/FundamentalGroupoid): the n-sphere is simply connected for n > 1 Prove that the `n`-dimensional sphere (i.e., the unit sphere centered at the origin in `(n + 1)`-dimensional real Euclidean space) is a simply connected space for `n > 1`. This proof follows Hatcher's "Algebraic Topology"; we first prove a general lemma about decomposing loops and then exploit the fact that non-surjective loops in the sphere are homotopically trivial. Note: To get this file to build, I edited `Mathlib/Tactic/Linter/DirectoryDependency.lean` to remove the restrictions on AlgebraicTopology files importing Geometry, NumberTheory, and SetTheory files. Thank you to those who shared their expertise [here](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Warning.20that.20AlgebraicTopology.20can't.20import.20SetTheory/with/533833638). As I understand it, this is just a short-term solution, so I would appreciate feedback on what to do about this situation. Note: I am unsure where exactly the file `SimplyConnectedSphere.lean` should go or whether that is an appropriate name for the file, so feedback there would be appreciated. --- To provide additional context, this code was written as a part of the Fields Undergraduate Summer Research Program at the University of Western Ontario under the supervision of Chris Kapulkin and Daniel Carranza. - [ ] depends on: #28208 - [ ] depends on: #28198 - [ ] depends on: #28185 - [ ] depends on: #28152 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology new-contributor blocked-by-other-PR 639/6 Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnectedSphere.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Topology/FoldTrans.lean,Mathlib/Topology/Path.lean,Mathlib/Topology/Subpath.lean 9 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
42-26817
1 month ago
53-24015
1 month ago
0-23
23 seconds
25488 VTrelat
author:VTrelat
feat(SetTheory/ZFC/Rationals): define rationals in ZFC Extend the model of ZFC with rationals: we define a proper type `ZFRat` representing integers based on pairs of `ZFInt` (enforcing the res to be nonzero) and following the usual construction of rationals. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #25483 - [ ] depends on: #25485 - [ ] depends on: #25486 t-set-theory new-contributor merge-conflict blocked-by-other-PR 2070/0 Mathlib/Data/Set/Prod.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Booleans.lean,Mathlib/SetTheory/ZFC/Integers.lean,Mathlib/SetTheory/ZFC/Rationals.lean 5 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
41-79227
1 month ago
41-79227
1 month ago
0-1808
30 minutes
23966 astrainfinita
author:astrainfinita
refactor: unbundle algebra from `{Seminormed, Normed}(Add)(Comm)Group` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #23621 - [ ] depends on: #23961 slow-typeclass-synthesis t-algebra t-analysis merge-conflict blocked-by-other-PR
label:t-algebra$
3233/2752 Archive/Imo/Imo1998Q2.lean,Counterexamples/LinearOrderWithPosMulPosEqZero.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Covolume.lean,Mathlib/Algebra/Order/Field/Canonical.lean,Mathlib/Algebra/Order/Field/Rat.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Nonneg/Field.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Ring/Nat.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/CPolynomial.lean,Mathlib/Analysis/Analytic/CPolynomialDef.lean,Mathlib/Analysis/Analytic/ChangeOrigin.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/Analytic/Linear.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Analytic/Polynomial.lean,Mathlib/Analysis/Analytic/RadiusLiminf.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Analytic/Within.lean,Mathlib/Analysis/Asymptotics/AsymptoticEquivalent.lean,Mathlib/Analysis/Asymptotics/Defs.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/Asymptotics/Theta.lean,Mathlib/Analysis/BoundedVariation.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/DivergenceTheorem.lean,Mathlib/Analysis/BoxIntegral/Integrability.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Measure.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/ContinuousLinearMap.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Defs.lean,Mathlib/Analysis/Calculus/AddTorsor/AffineMap.lean,Mathlib/Analysis/Calculus/AddTorsor/Coord.lean,Mathlib/Analysis/Calculus/BumpFunction/Basic.lean,Mathlib/Analysis/Calculus/BumpFunction/Convolution.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/BumpFunction/InnerProduct.lean,Mathlib/Analysis/Calculus/BumpFunction/Normed.lean,Mathlib/Analysis/Calculus/Conformal/InnerProduct.lean,Mathlib/Analysis/Calculus/Conformal/NormedSpace.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/ContDiff/CPolynomial.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/ContDiff/FiniteDimension.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Analysis/Calculus/ContDiff/WithLp.lean,Mathlib/Analysis/Calculus/DSlope.lean,Mathlib/Analysis/Calculus/Deriv/Abs.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/AffineMap.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Comp.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/Deriv/Inverse.lean,Mathlib/Analysis/Calculus/Deriv/Linear.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/Deriv/Prod.lean,Mathlib/Analysis/Calculus/Deriv/Shift.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/Deriv/Star.lean,Mathlib/Analysis/Calculus/Deriv/Support.lean,Mathlib/Analysis/Calculus/Deriv/ZPow.lean,Mathlib/Analysis/Calculus/DiffContOnCl.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Bilinear.lean,Mathlib/Analysis/Calculus/FDeriv/Comp.lean,Mathlib/Analysis/Calculus/FDeriv/Equiv.lean,Mathlib/Analysis/Calculus/FDeriv/Extend.lean,Mathlib/Analysis/Calculus/FDeriv/Linear.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Calculus/FDeriv/Mul.lean,Mathlib/Analysis/Calculus/FDeriv/Norm.lean,Mathlib/Analysis/Calculus/FDeriv/Pi.lean,Mathlib/Analysis/Calculus/FDeriv/Prod.lean,Mathlib/Analysis/Calculus/FDeriv/RestrictScalars.lean,Mathlib/Analysis/Calculus/FDeriv/Star.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/FDeriv/WithLp.lean,Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean 579 7 ['astrainfinita', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
41-54411
1 month ago
174-76361
5 months ago*
0-0
0 seconds*
22771 alreadydone
author:alreadydone
feat(Homotopy/Lifting): monodromy of covering maps and lifting criterion Define the monodromy of a covering map: given a path in the base space, lifting it through the covering map induces a bijection between the fibers at the two endpoints of the path. Definition 2.1 in https://ncatlab.org/nlab/show/monodromy. --- - [ ] depends on: #28234 - [x] depends on: #22649 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology blocked-by-other-PR 193/146 Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean,Mathlib/CategoryTheory/Groupoid.lean,Mathlib/Topology/Covering.lean,Mathlib/Topology/Homotopy/HomotopyGroup.lean,Mathlib/Topology/Homotopy/Lifting.lean,Mathlib/Topology/Homotopy/Product.lean 9 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] PatrickMassot
assignee:PatrickMassot
41-50196
1 month ago
41-56718
1 month ago
144-35711
144 days
28787 alreadydone
author:alreadydone
feat(Counterexamples): a domain whose ring of differences is not a domain Example produced by Gemini 2.5 Pro: https://gemini.google.com/share/9558539e1309 --- - [ ] depends on: #28468 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
1200/204 Counterexamples.lean,Counterexamples/GrothendieckAddGroupIsDomain.lean,Mathlib.lean,Mathlib/Algebra/Group/Subsemigroup/Defs.lean,Mathlib/Algebra/Module/End.lean,Mathlib/Algebra/Module/LocalizedModule/IsLocalization.lean,Mathlib/Algebra/Order/Nonneg/Basic.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Ring/Invertible.lean,Mathlib/GroupTheory/MonoidLocalization/Archimedean.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/Lemmas.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/RingTheory/IsTensorProduct.lean,Mathlib/RingTheory/Localization/Additive.lean,Mathlib/RingTheory/Localization/Away/Basic.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean,Mathlib/RingTheory/Localization/Ideal.lean,Mathlib/RingTheory/Localization/StrongRankCondition.lean,Mathlib/RingTheory/Smooth/StandardSmooth.lean,Mathlib/RingTheory/Trace/Quotient.lean 23 6 ['alreadydone', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'riccardobrasca'] nobody
40-44233
1 month ago
40-44233
1 month ago
1-48447
1 day
28475 astrainfinita
author:astrainfinita
chore(Analysis/SpecificLimits/Basic): generalize lemmas --- - [ ] depends on: #28472 - [ ] depends on: #28474 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict blocked-by-other-PR 131/98 Mathlib/Analysis/Normed/Algebra/Exponential.lean,Mathlib/Analysis/SpecificLimits/Basic.lean,Mathlib/Analysis/SpecificLimits/RCLike.lean,Mathlib/Data/Real/Hyperreal.lean,Mathlib/Topology/Algebra/Order/Field.lean,Mathlib/Topology/Instances/Rat.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
38-47708
1 month ago
38-47709
1 month ago
0-2105
35 minutes
27578 bjornsolheim
author:bjornsolheim
feat(Geometry/Convex/Cone): add conical combinations and conical hull - Prove closure properties of sequences with nonnegative coefficients - Define conical hull - Prove that the smallest pointed cone containing s is the conical hull of s - Implemented with Finsupp --- - [ ] depends on: #25292 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry new-contributor blocked-by-other-PR 188/0 Mathlib.lean,Mathlib/Geometry/Convex/Cone/ConicalHull.lean 2 8 ['YaelDillies', 'bjornsolheim', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
38-38382
1 month ago
52-34082
1 month ago
0-254
4 minutes
28596 CBirkbeck
author:CBirkbeck
Dedekind eta e2 We show that the logarithmic derivative of the Dedekind eta function equals the the Eisenstein series E2 (up to a constant). --- - [ ] depends on: #27606 - [ ] depends on: #26014 - [x] depends on: #28400 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict blocked-by-other-PR 1236/22 Mathlib.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/LogDeriv.lean,Mathlib/Analysis/Calculus/LogDerivUniformlyOn.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Complex/IntegerCompl.lean,Mathlib/Analysis/Complex/SummableUniformlyOn.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/SpecialFunctions/Log/Summable.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Cotangent.lean,Mathlib/NumberTheory/ArithmeticFunction.lean,Mathlib/NumberTheory/LSeries/RiemannZeta.lean,Mathlib/NumberTheory/ModularForms/DedekindEta.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/Defs.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/QExpansion.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/Summable.lean,Mathlib/NumberTheory/TsumDivsorsAntidiagonal.lean,Mathlib/RingTheory/EuclideanDomain.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean,Mathlib/Topology/Algebra/InfiniteSum/NatInt.lean 22 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
36-47922
1 month ago
unknown
unknown
28686 mitchell-horner
author:mitchell-horner
feat(Combinatorics/SimpleGraph): prove the Erdős-Stone theorem Proves the Erdős-Stone theorem: If `G` has at least `(1 - 1 / r + o(1)) * card V ^ 2 / 2` many edges, then `G` contains a copy of a `completeEquipartiteGraph (r + 1) t`. --- - [ ] depends on: #28685 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics merge-conflict blocked-by-other-PR WIP 757/14 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/ErdosStoneSimonovits.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Operations.lean,Mathlib/Data/Finset/Union.lean,Mathlib/Data/Nat/Cast/Order/Field.lean 10 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
36-47796
1 month ago
36-47797
1 month ago
0-10
10 seconds
28687 mitchell-horner
author:mitchell-horner
feat(Combinatorics/SimpleGraph): prove the Erdős-Stone-Simonovits theorem Proves the Erdős-Stone-Simonovits theorem: If the chromatic number of `H` equals `r + 1 > 0`, then the `extremalNumber` of `H` is greater than `(1 - 1 / r - o(1)) * card V ^ 2 / 2` and at most `(1 - 1 / r + o(1)) * card V ^ 2 / 2`. --- - [ ] depends on: #28686 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics merge-conflict blocked-by-other-PR WIP 879/14 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/ErdosStoneSimonovits.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Operations.lean,Mathlib/Data/Finset/Union.lean,Mathlib/Data/Nat/Cast/Order/Field.lean 10 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
36-47795
1 month ago
36-47796
1 month ago
0-74
1 minute
28689 mitchell-horner
author:mitchell-horner
feat(Combinatorics/SimpleGraph): prove well-known corollaries of the Erdős-Stone-Simonovits theorem Proves well-known corollaries of the Erdős-Stone-Simonovits theorem: E.g., if the chromatic number of `H` equals `r + 1 > 1`, then `extremalNumber n H` is asymptotically equivalent to `(1 - 1 / r) * n.choose 2` as `n → ∞` --- - [ ] depends on: #28687 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics merge-conflict blocked-by-other-PR WIP 958/14 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/ErdosStoneSimonovits.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Operations.lean,Mathlib/Data/Finset/Union.lean,Mathlib/Data/Nat/Cast/Order/Field.lean 10 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
36-47794
1 month ago
36-47795
1 month ago
0-45
45 seconds
23460 Timeroot
author:Timeroot
feat: Definition of `Clone` Basics about Clones. Part of #20051 --- - [ ] depends on: #26329 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR
label:t-algebra$
326/0 Mathlib.lean,Mathlib/Algebra/Clone/Basic.lean,Mathlib/Algebra/Clone/Defs.lean,Mathlib/Data/Fin/Basic.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] dagurtomas
assignee:dagurtomas
36-32772
1 month ago
36-32773
1 month ago
65-54988
65 days
29076 yury-harmonic
author:yury-harmonic
feat(BigOperators/ModEq): new file --- - [ ] depends on: #29072 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 319/15 Mathlib.lean,Mathlib/Algebra/BigOperators/ModEq.lean,Mathlib/Data/Int/ModEq.lean,Mathlib/Data/Nat/ModEq.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
36-26215
1 month ago
36-33053
1 month ago
0-726
12 minutes
26952 robin-carlier
author:robin-carlier
feat(CategoryTheory/DayConvolution): monoid objects internal to day convolutions In this file, given `F : C ⊛⥤ V`, we provide a bijective correspondence between lax monoidal structures on `F.functor` and `Mon_Class F` structures. We also prove that through this correspondance, monoidal natural transformations correspond to morphisms of internal monoid objects. --- - [ ] depends on: #26890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict blocked-by-other-PR 1574/19 Mathlib.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/DayFunctor.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Mon_.lean 5 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
36-20005
1 month ago
36-20006
1 month ago
0-584
9 minutes
27133 robin-carlier
author:robin-carlier
feat(CategoryTheory/Monoidal/DayConvolution): `C ⊛⥤ V` is monoidal closed when `V` is When `V` is a monoidal closed category admitting enough limits, we show that the type alias `C ⊛⥤ V` for functors `C ⥤ V` with Day convolution monoidal structure is monoidal closed using the API for `LawfulDayConvolutionClosedMonoidalCategoryStruct` developped in #27119. We expose the required data to exhibit (realization as a functor of) the internal hom as a suitable, and we port the lemmas that characterize its functoriality in that regard, as well as the evaluation and coevaluation morphisms. --- - [ ] depends on: #27119 - [ ] depends on: #26890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict blocked-by-other-PR 1706/20 Mathlib.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Closed.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/DayFunctor.lean 5 n/a ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
36-19880
1 month ago
unknown
unknown
27151 robin-carlier
author:robin-carlier
feat(CategoryTheory/Monoidal/DayConvolution): `C ⊛⥤ V` is braided/symmetric when `C` and `V` are braided/symmetric We use the machinery from #27150 to show that Day functors (the type alias for functors endowed with the Day convolution monoidal structure) are braided/symmetric when the base categories are. --- - [ ] depends on: #27150 - [ ] depends on: #26890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict blocked-by-other-PR 1591/20 Mathlib.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Braided.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/DayFunctor.lean 5 n/a ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
36-19878
1 month ago
unknown
unknown
27175 robin-carlier
author:robin-carlier
feat(CategoryTheory/Monoidal/DayConvolution): `LawfulDayConvolutionMonoidalCategoryStruct.ι C V D` is monoidal when the target is `C ⊛⥤ V` We prove a "soundness" result for our notion of `LawfulDayConvolutionMonoidalCategoryStruct`, i.e that when be interpret its field `ι` as valued in Day functors (the type alias for functors endowed with the Day convolution monoidal structure), the data from `LawfulDayConvolutionMonoidalCategoryStruct` turn `ι` in a monoidal functor, proving that the categories endowed with such a structure are precisely those that can be identified to monoidal (not necessarily full) subcategories of Day functors. Implicitly, the structure isomorphisms for this monoidal structure bundle isomorphisms asserting unicity up to isomorphisms of day convolutions. --- - [ ] depends on: #26890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict blocked-by-other-PR 1585/24 Mathlib.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/DayFunctor.lean 4 n/a ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
36-19877
1 month ago
unknown
unknown
28819 ScottCarnahan
author:ScottCarnahan
feat (Data/Finsupp): define convolution smul for finsupps on formal functions This is a generalization of the multiplication action of the ring of Laurent polynomials on the space of formal power series with unbounded pole terms. --- - [ ] depends on: #28876 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 127/15 Mathlib.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Order/AddTorsor.lean,Mathlib/Data/Finset/SMulAntidiagonal.lean,Mathlib/Data/Finsupp/PointwiseSMul.lean,Mathlib/Data/Set/SMulAntidiagonal.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean 7 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
34-57080
1 month ago
34-62474
1 month ago
1-6093
1 day
28013 astrainfinita
author:astrainfinita
feat: Lindemann-Weierstrass Theorem This PR continues the work from #6718. -------- - [x] depends on: #18693 - [ ] depends on: #29121 t-algebra t-analysis merge-conflict blocked-by-other-PR WIP
label:t-algebra$
1205/53 Mathlib.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/Polynomial/Splits.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/NumberTheory/Transcendental/Lindemann/AlgebraicPart.lean,Mathlib/NumberTheory/Transcendental/Lindemann/AnalyticalPart.lean,Mathlib/NumberTheory/Transcendental/Lindemann/Basic.lean,Mathlib/NumberTheory/Transcendental/Lindemann/SumAEvalARoots.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/Eval.lean,docs/100.yaml,docs/1000.yaml 11 n/a ['astrainfinita', 'github-actions', 'j-loreaux', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
33-83072
1 month ago
unknown
unknown
26413 michaellee94
author:michaellee94
feat(Analysis/ODE/MaximalSolution): Existence of maximal solutions for ODE meeting Picard-Lindelöf conditions Add existence proof for maximal solution of ODE using Picard-Lindelöf and a uniqueness theorem using Grönwall's lemma. --- - [x] depends on: #26382 - [ ] depends on: #29186 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis merge-conflict awaiting-author blocked-by-other-PR 746/1 Mathlib.lean,Mathlib/Analysis/ODE/MaximalSolution.lean,docs/undergrad.yaml 3 13 ['github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'winstonyin'] nobody
33-24612
1 month ago
33-24613
1 month ago
0-5139
1 hour
29203 Hagb
author:Hagb
(WIP) feat(RingTheory/MvPolynomial/Groebner) : Gröbner basis WIP Co-authored-by: Hao Shen [3118181069@qq.com](mailto:3118181069@qq.com) --- CC @tsuki8 - [ ] depends on: #26039 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import blocked-by-other-PR 507/3 Mathlib/RingTheory/MvPolynomial/Groebner.lean,Mathlib/RingTheory/MvPolynomial/MonomialOrder.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
32-64316
1 month ago
32-64317
1 month ago
0-0
0 seconds
28462 joelriou
author:joelriou
feat(AlgebraicTopology/SimplicialSet): the relative cell complex attached to a rank function for a pairing --- - [ ] depends on: #28351 - [ ] depends on: #28346 - [ ] depends on: #28336 - [ ] depends on: #28332 - [ ] depends on: #28330 - [ ] depends on: #28224 - [x] depends on: #27968 - [ ] depends on: #28034 - [ ] depends on: #26076 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology merge-conflict blocked-by-other-PR WIP 1442/5 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/IsUniquelyCodimOneFace.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/Pairing.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/PairingCore.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/Rank.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/RankNat.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/RelativeCellComplex.lean,Mathlib/AlgebraicTopology/SimplicialSet/Degenerate.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplicesSubcomplex.lean,Mathlib/AlgebraicTopology/SimplicialSet/Simplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/CategoryTheory/EpiMono.lean,docs/references.bib 15 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
32-63439
1 month ago
46-56312
1 month ago
0-1
1 second
28351 joelriou
author:joelriou
feat(AlgebraicTopology/SimplicialSet): the rank function with values in natural numbers of a regular pairing Given a regular pairing `P` for a subcomplex of a simplicial, following the work by Sean Moss, *Another approach to the Kan-Quillen model structure*, we show that the rank function relative to the well founded ancestrality relation has values in the type of natural numbers. --- - [ ] depends on: #28346 - [ ] depends on: #28336 - [ ] depends on: #28332 - [ ] depends on: #28330 - [ ] depends on: #28224 - [x] depends on: #27968 - [ ] depends on: #28034 - [ ] depends on: #26076 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology merge-conflict blocked-by-other-PR WIP 1316/5 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/IsUniquelyCodimOneFace.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/Pairing.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/PairingCore.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/Rank.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/RankNat.lean,Mathlib/AlgebraicTopology/SimplicialSet/Degenerate.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplicesSubcomplex.lean,Mathlib/AlgebraicTopology/SimplicialSet/Simplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/CategoryTheory/EpiMono.lean,docs/references.bib 14 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
32-63434
1 month ago
unknown
unknown
28346 joelriou
author:joelriou
feat(AlgebraicTopology/SimplicialSet): rank functions for pairings This PR introduces the type of (weak) rank functions for pairings, a notion introduced by Sean Moss, *Another approach to the Kan-Quillen model structure*. Rank functions can be used in order to show that certain pairings are regular (i.e. the ancestrality relation is well founded). In a future PR, it shall be shown that a regular pairing admits a rank function to the natural numbers, which shall be used to show that the corresponding inclusion of simplicial sets is a (strong) anodyne extension. --- - [ ] depends on: #28336 - [ ] depends on: #28332 - [ ] depends on: #28330 - [ ] depends on: #28224 - [x] depends on: #27968 - [ ] depends on: #28034 - [ ] depends on: #26076 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology merge-conflict blocked-by-other-PR WIP 1214/5 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/IsUniquelyCodimOneFace.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/Pairing.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/PairingCore.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/Rank.lean,Mathlib/AlgebraicTopology/SimplicialSet/Degenerate.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplicesSubcomplex.lean,Mathlib/AlgebraicTopology/SimplicialSet/Simplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/CategoryTheory/EpiMono.lean,docs/references.bib 13 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
32-63432
1 month ago
unknown
unknown
28336 joelriou
author:joelriou
feat(AlgebraicTopology/SimplicialSet): a helper structure to construct pairings In this PR, we introduce an helper structure `Subcomplex.PairingCore` in order to construct a pairing for a subcomplex of a simplicial set. The main differences with `Subcomplex.Pairing` are that we provide an index type `ι` in order to parametrize type (I) and type (II) simplices, and that the dimensions of these are definitionally `d` or `d + 1`. --- - [ ] depends on: #28332 - [ ] depends on: #28330 - [ ] depends on: #28224 - [x] depends on: #27968 - [ ] depends on: #28034 - [ ] depends on: #26076 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology merge-conflict blocked-by-other-PR WIP 1040/5 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/IsUniquelyCodimOneFace.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/Pairing.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/PairingCore.lean,Mathlib/AlgebraicTopology/SimplicialSet/Degenerate.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplicesSubcomplex.lean,Mathlib/AlgebraicTopology/SimplicialSet/Simplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/CategoryTheory/EpiMono.lean,docs/references.bib 12 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
32-63431
1 month ago
46-56511
1 month ago
0-2
2 seconds
28332 joelriou
author:joelriou
feat(AlgebraicTopology/SimplicialSet): pairings of non degenerate simplices, following Sean Moss In this PR, we introduce the notion of pairing for a subcomplex of a simplicial set. Following the work of Sean Moss, *Another approach to the Kan-Quillen model structure*, this is an essential tool in the study of (inner) anodyne extensions. --- - [ ] depends on: #28330 - [ ] depends on: #28224 - [x] depends on: #27968 - [ ] depends on: #28034 - [ ] depends on: #26076 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology merge-conflict blocked-by-other-PR WIP 796/5 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/IsUniquelyCodimOneFace.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/Pairing.lean,Mathlib/AlgebraicTopology/SimplicialSet/Degenerate.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplicesSubcomplex.lean,Mathlib/AlgebraicTopology/SimplicialSet/Simplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/CategoryTheory/EpiMono.lean,docs/references.bib 11 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
32-63430
1 month ago
46-56514
1 month ago
0-21
21 seconds
25741 robin-carlier
author:robin-carlier
feat(AlgebraicTopology/SimplexCategory/SimplicialObject): definitions of simplicial objects by generators and relation We leverage the equivalence between `SimplexCategory` and `SimplexCategoryGenRel` to give new constructors for (co)simplicial objects, as well as constructors for natural transformations (resp. isomorphism) between those. Final PR in the series of PR formalising the equivalence between `SimplexCategory` and `SimplexCategoryGenRel`. --- - [ ] depends on: #25740 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #21748.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/21748* t-algebraic-topology large-import t-category-theory merge-conflict blocked-by-other-PR 1363/9 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/Equivalence.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms.lean,Mathlib/AlgebraicTopology/SimplicialObject/GeneratorsRelations.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
32-60072
1 month ago
32-60073
1 month ago
11-15676
11 days
25273 YaelDillies
author:YaelDillies
refactor: make `MonoidAlgebra` into a one-field structure From Toric --- - [x] depends on: #26732 - [x] depends on: #28407 - [x] depends on: #28460 - [ ] depends on: #28511 - [ ] depends on: #29207 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) toric t-algebra blocked-by-other-PR WIP
label:t-algebra$
547/588 Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/Category/MonCat/Adjunctions.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Data/Finsupp/Multiset.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/LowDegree.lean 6 36 ['JovanGerb', 'YaelDillies', 'alreadydone', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
32-50940
1 month ago
33-52331
1 month ago
36-61320
36 days
27707 FLDutchmann
author:FLDutchmann
feat(NumberTheory/SelbergSieve): define Selberg's weights and prove basic results. This PR continues the work from #23635. Original PR: https://github.com/leanprover-community/mathlib4/pull/23635 - [ ] depends on: #27702 t-analysis t-number-theory merge-conflict blocked-by-other-PR 407/83 Mathlib/NumberTheory/Divisors.lean,Mathlib/NumberTheory/SelbergSieve.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
32-26722
1 month ago
32-26723
1 month ago
3-375
3 days
27898 grunweg
author:grunweg
feat: check indentation of doc-strings, basic version Basic version of #27897 (which still has some false positives): let's land this before weeding out the other errors. --- - [x] depends on: #27895 - [x] depends on: #27901 - [ ] depends on: #27933 - a PR for adding clarifying newlines - some miscellaneous indentation changes [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict blocked-by-other-PR 510/268 Mathlib/Algebra/ContinuedFractions/Basic.lean,Mathlib/Algebra/Lie/Classical.lean,Mathlib/Algebra/Lie/OfAssociative.lean,Mathlib/Algebra/Module/LinearMap/Polynomial.lean,Mathlib/Algebra/Order/Hom/Basic.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Polynomial/Inductions.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Oplax.lean,Mathlib/CategoryTheory/ConcreteCategory/Basic.lean,Mathlib/CategoryTheory/Enriched/Opposite.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/Limits/Basic.lean,Mathlib/CategoryTheory/NatIso.lean,Mathlib/CategoryTheory/Sites/Grothendieck.lean,Mathlib/CategoryTheory/Sites/Pretopology.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Data/Bracket.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Finsupp/MonomialOrder.lean,Mathlib/Data/Finsupp/MonomialOrder/DegLex.lean,Mathlib/Data/List/Defs.lean,Mathlib/Data/List/EditDistance/Defs.lean,Mathlib/Data/List/Rotate.lean,Mathlib/Data/Num/Basic.lean,Mathlib/Data/Num/Bitwise.lean,Mathlib/Data/Ordmap/Ordnode.lean,Mathlib/Data/PNat/Xgcd.lean,Mathlib/Data/Part.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/RingedSpace/PresheafedSpace/Gluing.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Group/Action.lean,Mathlib/NumberTheory/FLT/Basic.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/Order/Filter/Partial.lean,Mathlib/Order/Interval/Finset/Defs.lean,Mathlib/RingTheory/DividedPowers/Basic.lean,Mathlib/Tactic/Bound/Attribute.lean,Mathlib/Tactic/ComputeDegree.lean,Mathlib/Tactic/Linter/DocString.lean,Mathlib/Tactic/MinImports.lean,Mathlib/Tactic/MoveAdd.lean,Mathlib/Tactic/RewriteSearch.lean,Mathlib/Tactic/Sat/FromLRAT.lean,Mathlib/Tactic/TermCongr.lean,Mathlib/Tactic/ToAdditive/Frontend.lean,Mathlib/Util/Notation3.lean,Mathlib/Util/Superscript.lean,MathlibTest/DocString.lean,MathlibTest/slow_simp.lean 54 6 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
32-26721
1 month ago
32-26722
1 month ago
0-26
26 seconds
28126 Sebi-Kumar
author:Sebi-Kumar
feat(AlgebraicTopology/FundamentalGroupoid): relate equality in fundamental groupoid to homotopy Prove the theorem `fromPath_eq_iff_homotopic` which shows that two paths are equal in the fundamental groupoid if and only if they are homotopic. Also add simp lemmas `fromPath_refl`, `fromPath_symm`, and `fromPath_trans`. Together, these allow one to prove two paths are homotopic by transferring to the fundamental groupoid and using the `aesop_cat` tactic. --- I would like to thank Kenny Lau for inspiring this code on Zulip at [#Is there code for X? > Using aesop_cat to prove paths are homotopic](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Using.20aesop_cat.20to.20prove.20paths.20are.20homotopic). Also, I would like to note that I am a newcomer when it comes to contributing to Mathlib, and that this code was written as a part of a formalization project at the University of Western Ontario under the supervision of Chris Kapulkin and Daniel Carranza (which is happening through the Fields Undergraduate Summer Research Program). - [ ] depends on: #28234 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology new-contributor awaiting-author blocked-by-other-PR 121/141 Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean,Mathlib/CategoryTheory/Groupoid.lean,Mathlib/Topology/Covering.lean,Mathlib/Topology/Homotopy/HomotopyGroup.lean,Mathlib/Topology/Homotopy/Product.lean 8 10 ['Sebi-Kumar', 'alreadydone', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'mattrobball'] mattrobball
assignee:mattrobball
31-29360
1 month ago
31-29360
1 month ago
14-30316
14 days
28017 eric-wieser
author:eric-wieser
feat: generalize some opnorm lemmas to seminormed spaces --- - [ ] depends on: #28014 - [ ] depends on: #28101 - [ ] depends on: #29120 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict blocked-by-other-PR WIP 60/24 Mathlib/Analysis/NormedSpace/OperatorNorm/NNNorm.lean,Mathlib/Analysis/NormedSpace/Real.lean 2 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
31-12204
1 month ago
31-12205
1 month ago
0-0
0 seconds
27675 EtienneC30
author:EtienneC30
feat: introduce `covInnerBilin` `covInnerBilin` is the covariance bilinear form associated with a measure on an inner product space. from BrownianMotion --- - [ ] depends on: #27626 - [x] depends on: #27674 Co-authored-by: Rémy Degenne @RemyDegenne [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-measure-probability merge-conflict blocked-by-other-PR 695/2 Mathlib.lean,Mathlib/Analysis/NormedSpace/ContinuousBilinForm.lean,Mathlib/LinearAlgebra/BilinearForm/IsPosSemidef.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Hermitian.lean,Mathlib/MeasureTheory/Integral/Eval/Basic.lean,Mathlib/MeasureTheory/Integral/Eval/WithLp.lean,Mathlib/Probability/Moments/CovInnerBilin.lean,Mathlib/Probability/Moments/CovarianceBilin.lean 9 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
30-77948
1 month ago
52-80925
1 month ago
0-1309
21 minutes
25841 mitchell-horner
author:mitchell-horner
feat(Combinatorics/SimpleGraph): prove the Kővári–Sós–Turán theorem Prove the Kővári–Sós–Turán theorem for simple graphs: The `(completeBipartiteGraph α β).Free` simple graphs for `card α ≤ card β` on the vertex type `V` have at most `(card β-1)^(1/(card α))*(card V)^(2-1/(card α))/2 + (card V)*(card α-1)/2` edges. The double-counting construction from the proof is available in `namespace KovariSosTuran`. --- - [x] depends on: #19865 - [x] depends on: #20738 - [ ] depends on: #27602 I've tried to make as much of the double-counting construction not private as possible. I figure it is useful to borrow constructions between proofs. If this is just considered garbage and bloat and better left private. Please let me know. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #20240.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/20240* t-combinatorics blocked-by-other-PR WIP 283/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/KovariSosTuran.lean 3 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
30-42395
1 month ago
30-43803
1 month ago
45-15427
45 days
29357 eric-wieser
author:eric-wieser
refactor: generalize IsSimpleRing to semirings --- - [ ] depends on: #26277 - [ ] depends on: #22954 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 26/9 Mathlib/Data/Setoid/Basic.lean,Mathlib/RingTheory/SimpleRing/Basic.lean,Mathlib/RingTheory/SimpleRing/Defs.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
28-59914
28 days ago
28-59916
28 days ago
0-0
0 seconds
29393 staroperator
author:staroperator
feat(SetTheory/ZFC): `card (V_ o) = preBeth o` --- - [ ] depends on: #26544 - [ ] depends on: #29351 - [ ] depends on: #29365 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 231/41 Mathlib.lean,Mathlib/Data/W/Cardinal.lean,Mathlib/ModelTheory/Encoding.lean,Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Cardinal/Defs.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/SetTheory/Cardinal/Ordinal.lean,Mathlib/SetTheory/Cardinal/Pigeonhole.lean,Mathlib/SetTheory/Cardinal/Regular.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Cardinal.lean,Mathlib/SetTheory/ZFC/VonNeumann.lean 14 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'staroperator', 'vihdzp'] nobody
26-50154
26 days ago
27-4973
27 days ago
0-0
0 seconds
28865 grunweg
author:grunweg
feat: a map is smooth iff its post-composition with an immersion is The continuous case is mostly solved --- except for one detail where I'm not even sure if this is true. Maybe!, I need to require continuity, at least in general. (Perhaps not for interior points... we'll see!) A future PR will use this to golf the results in `Icc/Instances.lean`. --- - [ ] depends on: #28793 - [ ] depends on: #28796 - [ ] depends on: #28853 (for simplicity) - [ ] depends on: #28905 history bifurcates here: merge that PR first, then rebase this one [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict blocked-by-other-PR WIP 1026/7 Mathlib.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Geometry/Manifold/ContMDiff/Atlas.lean,Mathlib/Geometry/Manifold/ContMDiff/Defs.lean,Mathlib/Geometry/Manifold/IsImmersionEmbedding.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Topology/PartialHomeomorph.lean,docs/references.bib,temp_.sh 12 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
25-21074
25 days ago
25-21075
25 days ago
0-11
11 seconds
28905 grunweg
author:grunweg
feat: immersions are locally embeddings Hopefully, this can be used for the topological portion of #28865. (That part is not certain yet, the rest works.) --- TODO: move two helper results about embeddings to their proper place; perhaps even PR separately - [ ] depends on: #28793 - [ ] depends on: #28796 - [ ] depends on: #28853 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR 792/7 Mathlib.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Geometry/Manifold/ContMDiff/Atlas.lean,Mathlib/Geometry/Manifold/IsImmersionEmbedding.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Topology/PartialHomeomorph.lean,docs/references.bib,temp_.sh 10 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
25-21073
25 days ago
25-21074
25 days ago
0-617
10 minutes
29077 grunweg
author:grunweg
feat(Manifold/Instances/Icc): golf smoothness proof using immersions Prove that the inclusion of an interval into the real numbers is a smooth immersion, and use this to golf the proof that this inclusion is smooth. TODO: right now, the computation doesn't check out; I need to tweak the charts I have. But that is surely doable. A future PR will prove it is a smooth embedding. --- - [ ] depends on: #28865 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR 1122/56 Mathlib.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Geometry/Manifold/ContMDiff/Atlas.lean,Mathlib/Geometry/Manifold/ContMDiff/Defs.lean,Mathlib/Geometry/Manifold/Instances/Icc.lean,Mathlib/Geometry/Manifold/IsImmersionEmbedding.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Topology/PartialHomeomorph.lean,docs/references.bib,temp_.sh 13 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
25-21072
25 days ago
25-21072
25 days ago
0-309
5 minutes
25737 robin-carlier
author:robin-carlier
feat(AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms): Normal forms for `P_δ`s We prove that admissible lists indeed provide a normal form for morphisms of satisfying `P_δ`. To this end, we introduce `standardδ`, a construction that takes a list and turn it into a composition of `δ i`s in `SimplexCategoryGenRel`. We then prove that, thanks to the first simplicial identity, composition on the left corresponds to simplicial insertion in the list. This gives existence of a normal form for every morphism satisfying `P_δ`. For unicity, we introduce an auxiliary function `simplicialEvalδ : (List ℕ) → ℕ → ℕ` and show that for admissible lists, it lifts to `ℕ` the `orderHom` attached to `toSimplexCategory.map standardδ`, and that we can recover elements of the list only by looking at values of this function. Part of a series of PR formalising that `SimplexCategoryGenRel` is equivalent to `SimplexCategory`. --- - [ ] depends on: #25736 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #21746.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/21746* t-algebraic-topology large-import t-category-theory blocked-by-other-PR 380/9 Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
24-66433
24 days ago
24-67439
24 days ago
0-2
2 seconds
28804 grunweg
author:grunweg
feat: a few more tactic linters All analysis passes in this list have been suggested [on zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Tactic.20analysis.20framework/with/535766713). --- Untested, so may not work yet. - [ ] depends on: #28802 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict blocked-by-other-PR 204/26 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/TacticAnalysis/Declarations.lean,Mathlib/Tactic/TacticAnalysis/FunProp.lean,Mathlib/Tactic/TacticAnalysis/Misc.lean,MathlibTest/TacticAnalysis2.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
23-66617
23 days ago
23-66618
23 days ago
0-705
11 minutes
28968 linesthatinterlace
author:linesthatinterlace
refactor(Order/Hom/Basic): Replace `abbrev` with `def` in OrderEmbedding and OrderIso --- - [ ] depends on: #28944 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR 258/200 Mathlib/Data/Sum/Order.lean,Mathlib/Order/FixedPoints.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Hom/Order.lean 4 5 ['YaelDillies', 'github-actions', 'linesthatinterlace', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] b-mehta and linesthatinterlace
assignee:b-mehta assignee:linesthatinterlace
23-37590
23 days ago
23-37591
23 days ago
0-0
0 seconds
29519 joelriou
author:joelriou
feat(CategoryTheory): strong generators In this PR, we introduce a condition `IsStrongGenerator S` on a set `S` of objects in a category `C` which is stronger than `IsSeparating S` as we also require that for any proper subobject `A ⊂ X`, there exists a morphism `G ⟶ X` from an object in `S` which does not factor through `A`. In case coproducts exists, we give a characterization of `IsStrongSeparator S` (resp. `IsSeparating S`) in terms of the existence, for each object `X : C` of an extremal epi (resp. epi) to `X` from a coproduct of objects in `S`. In future works, this shall be used in order to characterize locally `κ`-presentable categories as cocomplete categories that have a strong generator consisting of `κ`-presentable objects. --- - [ ] depends on: #29518 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory blocked-by-other-PR WIP 281/0 Mathlib.lean,Mathlib/CategoryTheory/ExtremalEpi.lean,Mathlib/CategoryTheory/Generator/StrongGenerator.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
22-68641
22 days ago
23-10993
23 days ago
0-2
2 seconds
29543 joelriou
author:joelriou
feat(CategoryTheory): a set S of objects is a strong generator if any object is a colimit of objects in S --- - [ ] depends on: #29519 - [ ] depends on: #29518 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory blocked-by-other-PR 337/2 Mathlib.lean,Mathlib/CategoryTheory/ExtremalEpi.lean,Mathlib/CategoryTheory/Generator/StrongGenerator.lean,Mathlib/CategoryTheory/Presentable/CardinalFilteredPresentation.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
22-67056
22 days ago
22-67057
22 days ago
0-1700
28 minutes
29204 ShreckYe
author:ShreckYe
feat(GroupTheory/OrderOfElement): `Pi.orderOf_eq` and its related and depended-upon theorems related to `Pi`, `minimalPeriod`, and `IsPeriodicPt` The need for `Pi.orderOf_eq` comes in helping prove the value of the order of a `ZMod` number when used with `ZMod.prodEquivPi`. At first I was only trying to prove `(a : (i : Fin n) → α i) : orderOf a = Finset.univ.lcm (fun i => orderOf (a i))`, but after seeing the "Corresponding `pi` lemmas" comment, I realized that this could be generalized to Pi-types (`Pi`) and also some related and dependent theorems are not implemented yet, so I went on to add and prove these referring to those similar ones for product types (`Prod`). --- - [ ] depends on: #29530 t-group-theory large-import t-dynamics merge-conflict blocked-by-other-PR 153/10 Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/Dynamics/PeriodicPts/Lemmas.lean,Mathlib/GroupTheory/OrderOfElement.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Logic/Function/Iterate.lean 5 7 ['ShreckYe', 'github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
22-34312
22 days ago
22-34313
22 days ago
9-60153
9 days
29565 joelriou
author:joelriou
feat(CategoryTheory): dense functors A functor `F : C ⥤ D` is dense if any `Y : D` is a canonical colimit relatively to `F`. When `F` is full, we show that this is equivalent to saying that the restricted Yoneda functor `D ⥤ Cᵒᵖ ⥤ Type _` is fully faithful. We also show that the range of a dense functor is a strong generator. --- - [ ] depends on: #29556 - [ ] depends on: #29519 - [ ] depends on: #29518 - [ ] depends on: #29543 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory blocked-by-other-PR WIP 531/2 Mathlib.lean,Mathlib/CategoryTheory/ExtremalEpi.lean,Mathlib/CategoryTheory/Functor/Dense.lean,Mathlib/CategoryTheory/Generator/StrongGenerator.lean,Mathlib/CategoryTheory/Limits/Canonical.lean,Mathlib/CategoryTheory/Presentable/CardinalFilteredPresentation.lean 6 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
22-20667
22 days ago
22-20674
22 days ago
0-1
1 second
29243 yoh-tanimoto
author:yoh-tanimoto
feat(Analysis/InnerProductSpace/Projection/Submodule): add `sup_orthogonal` for `ClosedSubmodules` prove that the closed submodule generated by the orthogonal complements of two submodules is the orthogonal complement of the intersection. motivation: needed to define standard subspaces in a Hilbert space #29251 https://ems.press/content/serial-article-files/48171 - [ ] depends on: #29230 for `Lattice` `CompleteLattice` - [ ] depends on: #29241 for the definition of `orthogonal` merge-conflict blocked-by-other-PR 354/1 Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/InnerProductSpace/Projection/Submodule.lean,Mathlib/Topology/Algebra/Module/ClosedSubmodule.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
21-36146
21 days ago
21-36146
21 days ago
0-2553
42 minutes
29251 yoh-tanimoto
author:yoh-tanimoto
feat(Analysis/InnerProductSpace/): define standard subspaces of a complex Hilbert space define standard subspaces of a complex Hilbert space: a standard subspace `S` of `H` is a closed real subspace `S` such that `S ⊓ i S = ⊥` and `S ⊔ i S = ⊤`. prove that the symplectic complement of `S` is again a standard subspace and the double symplectic complement is itself. motivation: one can define a closable operator `x + i y ↦ x - i y` and develop an analogue of the Tomita-Takesaki modular theory for von Neumann algebras. By considering inclusions of standard subspaces, one can obtain unitary representations of various Lie groups. https://ems.press/content/serial-article-files/48171 - [ ] depends on: #29230 for `Lattice` `CompleteLattice` - [ ] depends on: #29241 for the definition of `orthogonal` - [ ] depends on: #29243 for `sup_orthogonal` - [ ] depends on: #29235 for `mapEquiv` merge-conflict blocked-by-other-PR 699/2 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/InnerProductSpace/Projection/Submodule.lean,Mathlib/Analysis/InnerProductSpace/StandardSubspace.lean,Mathlib/Topology/Algebra/Module/ClosedSubmodule.lean 5 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
21-36023
21 days ago
21-36024
21 days ago
0-3098
51 minutes
28733 CBirkbeck
author:CBirkbeck
E2 s transform --- - [ ] depends on : #29115 - [ ] depends on: #27606 - [ ] depends on" #26014 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict blocked-by-other-PR 2068/19 Mathlib.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Complex/IntegerCompl.lean,Mathlib/Analysis/Complex/Norm.lean,Mathlib/Analysis/Complex/SummableUniformlyOn.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Cotangent.lean,Mathlib/NumberTheory/ArithmeticFunction.lean,Mathlib/NumberTheory/IccSums.lean,Mathlib/NumberTheory/LSeries/RiemannZeta.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/Defs.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/QExpansion.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/Summable.lean,Mathlib/NumberTheory/TsumDivsorsAntidiagonal.lean,Mathlib/Topology/Algebra/InfiniteConditionalSum/Basic.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean,Mathlib/Topology/Algebra/InfiniteSum/NatInt.lean,Mathlib/Topology/Algebra/Monoid/Defs.lean,Mathlib/Topology/UniformSpace/LimUnder.lean 24 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
21-34511
21 days ago
unknown
unknown
26858 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra): Define the associated graded ring to filtered ring Define the associated graded ring to a filtered ring. --- - [ ] depends on: #26857 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) migrated from #20913 t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
436/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean 2 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
20-86079
20 days ago
unknown
unknown
26859 Thmoas-Guan
author:Thmoas-Guan
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: #26858 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) migrated from #21806 t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
547/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean 2 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
20-86078
20 days ago
unknown
unknown
26860 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra): Define associated graded module Define the associated graded module to a filtered module. --- - [ ] depends on: #26858 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) migrated from #20940 t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
651/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean 2 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
20-86076
20 days ago
unknown
unknown
26861 Thmoas-Guan
author:Thmoas-Guan
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 Co-authored-by: Yi Yuan @yuanyi-350 Co-authored-by: Weichen Jiao @AlbertJ-314 --- - [ ] depends on: #26857 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) migrated from #22632 t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
376/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
20-86075
20 days ago
20-86076
20 days ago
0-1200
20 minutes
26862 Thmoas-Guan
author:Thmoas-Guan
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 Co-authored-by: Yi Yuan @yuanyi-350 Co-authored-by: Weichen Jiao @AlbertJ-314 --- - [ ] depends on: #26858 - [ ] depends on: #26861 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) migrated from #22208 t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
806/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 3 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
20-86074
20 days ago
unknown
unknown
26863 Thmoas-Guan
author:Thmoas-Guan
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: #26859 - [ ] depends on: #26862 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) migrated from #22454 t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
1034/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 3 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
20-86073
20 days ago
unknown
unknown
26867 Thmoas-Guan
author:Thmoas-Guan
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: #26860 - [ ] depends on: #26862 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) migrated from #22893 t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
1182/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 3 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
20-86071
20 days ago
unknown
unknown
26868 Thmoas-Guan
author:Thmoas-Guan
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 Co-authored-by: Yi Yuan @yuanyi-350 Co-authored-by: Weichen Jiao @AlbertJ-314 --- - [ ] depends on: #26861 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) migrated from #22707 t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
532/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/Exactness.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 4 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
20-86070
20 days ago
unknown
unknown
26869 Thmoas-Guan
author:Thmoas-Guan
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 Co-authored-by: Yi Yuan @yuanyi-350 Co-authored-by: Weichen Jiao @AlbertJ-314 --- - [ ] depends on: #26868 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) migrated from #22972 t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
723/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/Exactness.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 4 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
20-86069
20 days ago
unknown
unknown
25903 pfaffelh
author:pfaffelh
feat(MeasureTheory): finite unions of sets in a semi-ring (in terms of measure theory) form a ring : Finite unions of sets in a semi-ring (in terms of measure theory) form a ring The set containing finite unions of sets in a semi-ring are a ring. Part of `MeasureTheory.SetSemiring` is moved to the new file `MeasureTheory.SetRing`. --- - [ ] depends on: #25902 [contains changes in `SetSemiring` as well] --- *This PR continues the work from #23117.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/23117* large-import t-measure-probability blocked-by-other-PR 648/131 Mathlib.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Module/Bimodule.lean,Mathlib/Data/Set/Lattice.lean,Mathlib/Data/Set/Pairwise/Lattice.lean,Mathlib/Data/Set/Prod.lean,Mathlib/MeasureTheory/MeasurableSpace/Pi.lean,Mathlib/MeasureTheory/Measure/AddContent.lean,Mathlib/MeasureTheory/PiSystem.lean,Mathlib/MeasureTheory/SetAlgebra.lean,Mathlib/MeasureTheory/SetRing.lean,Mathlib/MeasureTheory/SetSemiring.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ExtractLets.lean,lake-manifest.json,lakefile.lean 16 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
17-50448
17 days ago
unknown
unknown
27510 chrisflav
author:chrisflav
feat(RingTheory/Height): height of ideal is height of preimage plus height in quotient If `S` has going-down over `R`, the height of a prime `P` lying over `p` equals the height of `p` plus the height of the image of `P` in `S / p S`. Co-authored by: Sihan Su Co-authored by: Yi Song --- - [ ] depends on: #22300 - [ ] depends on: #27508 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import blocked-by-other-PR 192/1 Mathlib/Data/Finset/Card.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/RingTheory/Ideal/GoingDown.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Basic.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Spectrum/Prime/RingHom.lean 10 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
17-48843
17 days ago
60-34490
1 month ago
0-1531
25 minutes
28972 themathqueen
author:themathqueen
feat(LinearAlgebra/Matrix): star-algebra automorphisms on matrices are unitarily inner Characterization of star-algebra automorphisms on matrices: for any star-algebra automorphism `f` on matrices, there exists a unitary matrix `U` such that `f x = U * x * star U`. --- - [ ] depends on: #28100 - [x] depends on: #28182 - [x] depends on: #28881 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR
label:t-algebra$
155/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/GeneralLinearGroup/Basic.lean,Mathlib/LinearAlgebra/Matrix/StarAlgEquiv.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'themathqueen'] nobody
17-43445
17 days ago
38-41121
1 month ago
0-412
6 minutes
28291 vasnesterov
author:vasnesterov
feat(Tactic): tactic for computing asymptotics of real functions It's an auxiliary PR which implements the entire `compute_asymptotics` tactic. I will split it into multiple small PRs if it is decided that we will merge it. --- In this PR I implement the `compute_asymptotics` tactic. Its purpose is to compute asymptotics of functions from `ℝ` to `ℝ`. So far it is able to compute the limit of any function constructed using arithmetic operations (`+`, `-`, `*`, `/`, inversion), powers, logarithms, and exponents. ```lean import Mathlib.Tactic.ComputeAsymptotics open Real Filter Topology Asymptotics example : Tendsto (fun (x : ℝ) ↦ (1 + 6 * x⁻¹) ^ (7 * x)) atTop (𝓝 (exp 42)) := by compute_asymptotics example : (fun x ↦ x - 1 - log x) ~[𝓝[≠] 1] (fun x ↦ (x - 1) ^ 2 / 2) := by compute_asymptotics example (a b : ℝ) (h : a < b) : (fun x ↦ (x + x * log x) ^ a) =O[atTop] (fun x ↦ (x / log x) ^ b) := by compute_asymptotics example : (fun x ↦ log x) =o[𝓝[>] 0] (fun x ↦ Real.pi / (exp (Real.log 2 * x) - 1)) := by compute_asymptotics ``` For more examples see `compute_asymptotics.lean` in tests. ### TODO * Support different domains in `compute_limit` as well. * Support trigonometric functions and Gamma-function. ### References I am basically implementing [this article](https://www21.in.tum.de/~eberlm/pdfs/real_asymp.pdf) about computing asymptotics in Isabelle by Manuel Eberl. - [ ] depends on: #23831 - [ ] depends on: #28874 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis t-meta merge-conflict blocked-by-other-PR WIP 17665/340 Mathlib.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/OfScalars.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Defs.lean,Mathlib/Analysis/SpecialFunctions/Complex/Analytic.lean,Mathlib/Data/Nat/Factorial/Basic.lean,Mathlib/Data/Seq/Parallel.lean,Mathlib/Data/Seq/Seq.lean,Mathlib/Data/Set/Pointwise/Interval.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ComputeAsymptotics.lean,Mathlib/Tactic/ComputeAsymptotics/Lemmas.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/BasisM.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/CompareMS.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/CompareReal.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/ConstSimp.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/ConstSimpAttribute.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/ConvertDomain.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/Defs.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/Exp.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/LeadingTerm.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/Log.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/MS.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/Misc.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/Normalization.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/Trimming.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Basic.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Basis.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Defs.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/LeadingTerm.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/LogBasis.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Operations.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Operations/Add.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Operations/Basic.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Operations/Exp.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Operations/ForPow.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Operations/Inv.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Operations/Log.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Operations/Merge.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Operations/Mul.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Operations/Pow.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Operations/Powser.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Term.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Trimming.lean,Mathlib/Tactic/NormNum/NatFactorial.lean,Mathlib/Topology/Algebra/Order/Field.lean,MathlibTest/compute_asymptotics.lean,scripts/README.md,scripts/migrate_to_fork.py,scripts/noshake.json 53 1 ['mathlib4-dependent-issues-bot'] nobody
16-65130
16 days ago
52-49735
1 month ago
0-54
54 seconds
29282 Jlh18
author:Jlh18
feat(CategoryTheory): HasColimits instance onGrpd Show that the category of groupoids has all small colimits, as a coreflective subcategory of `Cat`, which has all small colimits. The right adjoint of the forgetful functor is the core functor `CategoryTheory.Core.functor`. - [ ] depends on: #29283 [Core of a category as a functor] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict blocked-by-other-PR 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
16-57975
16 days ago
16-57976
16 days ago
0-396
6 minutes
29283 Jlh18
author:Jlh18
feat(CategoryTheory): define forgetful-core adjunction between Cat and Grpd * Define `CategoryTheory.Core.functor`: the functor `Cat ⥤ Grpd` that on objects takes the core of a category * Define `CategoryTheory.Core.adjunction`: the adjunction with the forgetful functor `Grpd.forgetToCat` on the left, and the core functor `Core.functor` on the right. * Hence provide an instance that `Grpd.forgetToCat` is coreflective. - [ ] depends on: #29284 [Extra lemmas in CategoryTheory.Core] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict blocked-by-other-PR 104/4 Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/CategoryTheory/Category/Grpd.lean,Mathlib/CategoryTheory/Core.lean,Mathlib/CategoryTheory/Groupoid/Grpd/Core.lean 5 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
16-57974
16 days ago
16-57974
16 days ago
0-3572
59 minutes
26136 vasnesterov
author:vasnesterov
feat(Topology/Instances): Cantor set is homeomorphic to `ℕ → Bool` * Prove that `Real.ofDigits` is a continuous map from `ℕ → Fin b` to `ℝ`. * Prove that the Cantor set is homeomorphic to `ℕ → Bool`. --- - [ ] depends on: #26096 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-topology merge-conflict blocked-by-other-PR 614/0 Mathlib.lean,Mathlib/Algebra/Order/Floor/Semiring.lean,Mathlib/Data/Nat/Cast/Order/Field.lean,Mathlib/Data/Real/OfDigits.lean,Mathlib/Topology/Instances/CantorSet.lean,scripts/noshake.json 6 8 ['alreadydone', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'vasnesterov'] nobody
16-55179
16 days ago
90-80410
2 months ago
0-128
2 minutes
27950 alreadydone
author:alreadydone
feat(MonoidAlgebra): criteria for `single` to be a unit, irreducible or prime --- - [ ] depends on: #27936 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict blocked-by-other-PR WIP
label:t-algebra$
714/192 Mathlib.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/Divisibility/Basic.lean,Mathlib/Algebra/Divisibility/Finite.lean,Mathlib/Algebra/Divisibility/Hom.lean,Mathlib/Algebra/Divisibility/Prod.lean,Mathlib/Algebra/Divisibility/Units.lean,Mathlib/Algebra/Group/Action/Pointwise/Finset.lean,Mathlib/Algebra/Group/Irreducible/Lemmas.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/GroupWithZero/Associated.lean,Mathlib/Algebra/MonoidAlgebra/Divisibility.lean,Mathlib/Algebra/MonoidAlgebra/NoZeroDivisors.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Algebra/Prime/Defs.lean,Mathlib/Algebra/Prime/Lemmas.lean,Mathlib/Algebra/Prime/Prod.lean,Mathlib/Data/Nat/Init.lean,Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/GroupTheory/Coset/Card.lean,Mathlib/GroupTheory/Exponent.lean,Mathlib/GroupTheory/GroupAction/Blocks.lean,Mathlib/GroupTheory/GroupAction/Period.lean,Mathlib/GroupTheory/Index.lean,Mathlib/GroupTheory/OrderOfElement.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean,Mathlib/GroupTheory/Schreier.lean,Mathlib/GroupTheory/SpecificGroups/Cyclic.lean,Mathlib/Tactic/ToAdditive/Frontend.lean 33 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
15-52082
15 days ago
58-11990
1 month ago
0-53
53 seconds
29764 ScottCarnahan
author:ScottCarnahan
feat (Algebra/Vertex): API up to residue products (WIP) This PR contains definitions leading up to the residue product of vertex operators and some basic properties. Parts will be split off as smaller PRs when I have time. --- - [ ] depends on: #25831 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra blocked-by-other-PR
label:t-algebra$
894/16 Mathlib.lean,Mathlib/Algebra/Vertex/HVertexOperator.lean,Mathlib/Algebra/Vertex/VertexOperator.lean,Mathlib/RingTheory/Binomial.lean,Mathlib/RingTheory/HahnSeries/Addition.lean,Mathlib/RingTheory/HahnSeries/Binomial.lean,Mathlib/RingTheory/HahnSeries/HEval.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean 8 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
15-44854
15 days ago
15-44856
15 days ago
0-25208
7 hours
29790 robertmaxton42
author:robertmaxton42
feat (IsCoherentWith) : families of maps from a coherent collection of subspaces lift uniquely to maps from the total space * Adds `IsCoherentWith.liftCover`, which lifts a compatible family of continuous maps from each member of a coherent set of subspaces to a single continuous map on the whole space. * Adds `IsCoherentWith.liftCover'`, which does the same but for a set of coherent subspaces given as the range of a function into `Set X` rather than as an explicit `Set (Set X).` - [ ] depends on: #29788 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 350/3 Mathlib/Data/Set/Subset.lean,Mathlib/Data/Set/UnionLift.lean,Mathlib/Topology/Category/TopCat/Limits/Products.lean,Mathlib/Topology/Coherent.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/Constructions/SumProd.lean,Mathlib/Topology/ContinuousMap/Basic.lean 7 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
15-3616
15 days ago
15-4984
15 days ago
0-4627
1 hour
27047 YaelDillies
author:YaelDillies
feat: `MonoidHom.toAdditive''` as a `MulEquiv` From Toric --- - [ ] depends on: #29800 I haven't yet been very thorough with the new lemmas. I first want to hear thoughts about the names [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) toric t-algebra blocked-by-other-PR
label:t-algebra$
31/7 Mathlib/Algebra/Group/TypeTags/Hom.lean 1 5 ['Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'mathlib4-dependent-issues-bot'] adomani
assignee:adomani
14-73324
14 days ago
14-73325
14 days ago
68-33171
68 days
27821 BGuillemet
author:BGuillemet
feat(CategoryTheory/Sites/Sheaf): functorial version of Sheaf.homEquiv Add two functorial versions of Sheaf.homEquiv, one using `yoneda` and the other using `coyoneda`. --- - [ ] depends on: #27819 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory blocked-by-other-PR 174/19 Mathlib/CategoryTheory/Sites/Sheaf.lean,Mathlib/CategoryTheory/Yoneda.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
14-42738
14 days ago
14-42765
14 days ago
0-2066
34 minutes
26872 faenuccio
author:faenuccio
chore(RingTheory/Valuation/RankOne): modify the definition of Valuation.RankOne using its range rather than its codomain We modify the definition of `RankOne` for a valuation in terms of its `valueGroup` rather than its codomain. Co-authored by María Inés de Frutos Fernández @mariainesdff - [ ] depends on: #26588 - [x] depends on: #26980 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author blocked-by-other-PR
label:t-algebra$
257/34 Mathlib.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/Algebra/Order/GroupWithZero/Range.lean,Mathlib/Algebra/Order/GroupWithZero/WithZero.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/RankOne.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean 7 13 ['faenuccio', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] nobody
14-41060
14 days ago
14-41122
14 days ago
0-117
1 minute
29812 Jlh18
author:Jlh18
refactor: weaken HasPullbacks to HasPullback in MorphismProperty.Limits The `HasPullbacks` instance on a category `C` for defining the `baseChange` / pullback functor along a map `f : X -> Y` between their over categories can be weakened to just a `HasPullback` condition on `f`. - [ ] depends on: #29795 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory blocked-by-other-PR 31/22 Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/CommSq.lean,Mathlib/CategoryTheory/MorphismProperty/Limits.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
14-35391
14 days ago
14-43891
14 days ago
0-1983
33 minutes
29824 themathqueen
author:themathqueen
feat(Algebra/Order/Star): add `StarOrderedRing (Π i, A i)` --- - [ ] depends on: #29823 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR
label:t-algebra$
125/45 Mathlib.lean,Mathlib/Algebra/Group/Subgroup/Finite.lean,Mathlib/Algebra/Group/Submonoid/Finite.lean,Mathlib/Algebra/Order/Star/Pi.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
14-13870
14 days ago
14-17263
14 days ago
0-423
7 minutes
28067 grunweg
author:grunweg
Docstring enumerations Tracking PR; to be split. Audit all ocurrences of `^ \S`; exhaustive. --- - [x] depends on: #28068 - [x] depends on: #28069 - [ ] depends on: #28070 - [x] depends on: #28118 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR 264/263 Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/BrauerGroup/Defs.lean,Mathlib/Algebra/Module/LinearMap/Polynomial.lean,Mathlib/CategoryTheory/Abelian/NonPreadditive.lean,Mathlib/CategoryTheory/EqToHom.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Limits/Pi.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Sites/Grothendieck.lean,Mathlib/CategoryTheory/Sites/Pretopology.lean,Mathlib/Condensed/Discrete/Characterization.lean,Mathlib/FieldTheory/ChevalleyWarning.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/RootSystem/GeckConstruction/Basic.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/OuterMeasure/Basic.lean,Mathlib/MeasureTheory/OuterMeasure/Defs.lean,Mathlib/NumberTheory/FLT/Basic.lean,Mathlib/NumberTheory/LSeries/PrimesInAP.lean,Mathlib/RingTheory/Grassmannian.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean,Mathlib/RingTheory/WittVector/Teichmuller.lean,Mathlib/Tactic/Bound.lean,Mathlib/Tactic/Bound/Attribute.lean,Mathlib/Tactic/ENatToNat.lean,Mathlib/Tactic/FBinop.lean,Mathlib/Tactic/IntervalCases.lean,Mathlib/Tactic/TermCongr.lean,Mathlib/Util/Notation3.lean,Mathlib/Util/Superscript.lean,docs/Conv/Guide.lean 38 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
13-54217
13 days ago
13-54217
13 days ago
0-2904
48 minutes
29810 Jlh18
author:Jlh18
refactor: weaken HasPullbacks to HasPullback in MorphismProperty.OverAdjuction - [ ] depends on: #29795 - [ ] depends on: #29812 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory blocked-by-other-PR 56/35 Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/MorphismProperty/Limits.lean,Mathlib/CategoryTheory/MorphismProperty/OverAdjunction.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
13-5450
13 days ago
13-5450
13 days ago
0-0
0 seconds
27789 staroperator
author:staroperator
feat(ModelTheory): semilinear sets are closed under intersection and set difference These are generalizations of the same results on `ℕ ^ k` (in #27414) to any cancellative monoid (e.g. `ℤ ^ k`). - [ ] depends on: #27414 - [x] depends on: #27786 - [x] depends on: #27787 - [x] depends on: #27955 - [x] depends on: #29034 - [x] depends on: #29035 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic blocked-by-other-PR 764/4 Mathlib.lean,Mathlib/ModelTheory/Arithmetic/Presburger/Semilinear/Basic.lean,Mathlib/ModelTheory/Arithmetic/Presburger/Semilinear/Defs.lean,Mathlib/ModelTheory/Arithmetic/Presburger/Semilinear/Nat.lean 4 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
11-33334
11 days ago
11-33356
11 days ago
0-1510
25 minutes
29813 Jlh18
author:Jlh18
feat(CategoryTheory): define Over.pushforward A morphism property `P` is *stable* under pushforward if `Over.pullback` also a left adjoint between the subcategory `P.Over ⊤ X` of the over category of objects satisfying the morphism-property. This definition makes sense when `HasPullacks T` is generalized to `[∀ {W : T} (h : W ⟶ Y), HasPullback h f]` just for the morphism we take pullbacks of. See Joyal's pi-clans (https://arxiv.org/pdf/1710.10238) - [ ] depends on: #29795 - [ ] depends on: #29812 - [ ] depends on: #29810 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory blocked-by-other-PR 84/35 Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/MorphismProperty/Limits.lean,Mathlib/CategoryTheory/MorphismProperty/OverAdjunction.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
10-58031
10 days ago
10-58031
10 days ago
0-0
0 seconds
29770 xroblot
author:xroblot
feat(DedekindDomain): formulas for the different ideal in the compositum of disjoint extensions Let `A ⊆ B` be a finite extension of Dedekind domains and assume that `A ⊆ R₁, R₂ ⊆ B` are two subrings such that `R₁ ⊔ R₂ = B`, their fractions fields are linearly disjoint (over the fraction field of `A`) and that `𝓓(R₁/A)` and `𝓓(R₂/A)` are coprime, where `𝓓` denote the different ideal. We prove in particular: `𝓓(B/A) = 𝓓(R₁/A) * 𝓓(R₂/A)` --- - [ ] depends on: #26155 - [ ] depends on: #26396 large-import t-algebra blocked-by-other-PR
label:t-algebra$
430/44 Mathlib.lean,Mathlib/LinearAlgebra/BilinearForm/Properties.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/DedekindDomain/LinearDisjoint.lean,Mathlib/RingTheory/FractionalIdeal/Extended.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Trace/Basic.lean 7 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
9-54059
9 days ago
15-51818
15 days ago
0-1515
25 minutes
29940 xroblot
author:xroblot
feat(NumberTheory): basic results about discriminants in an extension --- - [ ] depends on: #26155 - [ ] depends on: #28797 t-number-theory blocked-by-other-PR 404/22 Mathlib/NumberTheory/NumberField/Discriminant/Different.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/DedekindDomain/IntegralClosure.lean,Mathlib/RingTheory/FractionalIdeal/Extended.lean,Mathlib/RingTheory/Ideal/GoingUp.lean,Mathlib/RingTheory/Ideal/Norm/RelNorm.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/FractionRing.lean,Mathlib/RingTheory/UniqueFactorizationDomain/NormalizedFactors.lean 9 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
9-50561
9 days ago
9-50589
9 days ago
0-91
1 minute
27980 smmercuri
author:smmercuri
feat: dimensions of completions at infinite place extensions This PR continues the work from #24853. Original PR: https://github.com/leanprover-community/mathlib4/pull/24853 --- - [x] depends on: #27977 - [ ] depends on: #27978 - [ ] depends on: #27974 - [x] depends on: #27975 - [ ] depends on: #27976 - [ ] depends on: #29942 - [ ] depends on: #29946 large-import FLT t-number-theory merge-conflict blocked-by-other-PR 619/2 Mathlib.lean,Mathlib/Analysis/Normed/Field/WithAbs.lean,Mathlib/Analysis/Normed/Ring/WithAbs.lean,Mathlib/NumberTheory/NumberField/Completion.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Dimension.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Embeddings.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Ramification.lean 7 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
9-39171
9 days ago
9-39171
9 days ago
0-3752
1 hour
25900 pfaffelh
author:pfaffelh
feat (Topology/Compactness/CompactSystem): Set system of finite unions of sets in a compact system is again a compact system feat (Topology/Compactness/CompactSystem): The set system of finite unions of sets in a compact system is a compact system A compact system is a set system with the following property: If all finite intersections of a sequence in the set system is non-empty, the countable intersection is not empty. Starting with a compact system, consider the finite unions of sets in the copact system. Such sets again form a compact system (`IsCompactSystem.union.isCompactSystem`). --- - [x] depends on: #24906 - [ ] depends on: #25899 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24543.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24543* t-topology merge-conflict blocked-by-other-PR 996/66 Mathlib.lean,Mathlib/Data/Set/Accumulate.lean,Mathlib/Data/Set/Dissipate.lean,Mathlib/Data/Set/Prod.lean,Mathlib/MeasureTheory/Constructions/Cylinders.lean,Mathlib/MeasureTheory/Constructions/ProjectiveFamilyContent.lean,Mathlib/MeasureTheory/PiSystem.lean,Mathlib/Topology/Compactness/CompactSystem.lean 8 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
9-4680
9 days ago
9-4680
9 days ago
0-850
14 minutes
25906 pfaffelh
author:pfaffelh
feat (Topology/Compactness/CompactSystem): Closed and compact square cylinders form a compact system. feat (Topology/Compactness/CompactSystem): Closed and compact square cylinders form a compact system. A square cylinder is a set of the form `s.pi t` in a product space. A closed compact square cylinder has `IsClosed (t i)` and `IsCompact (t i)` for all `i ∈ s`. This set system is a compact system (as introduced in PR #25899). Streamline the definition of square cylinders in MeasureTheory/Constructions/Cylinders on the way. Co-authors: Rémy Degenne remy.degenne@inria.fr --- - [ ] depends on: #25899 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24542.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24542* t-topology merge-conflict blocked-by-other-PR 716/65 Mathlib.lean,Mathlib/Data/Set/Accumulate.lean,Mathlib/Data/Set/Dissipate.lean,Mathlib/Data/Set/Prod.lean,Mathlib/MeasureTheory/Constructions/Cylinders.lean,Mathlib/MeasureTheory/Constructions/ProjectiveFamilyContent.lean,Mathlib/MeasureTheory/PiSystem.lean,Mathlib/Topology/Compactness/CompactSystem.lean 8 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
9-4678
9 days ago
9-4679
9 days ago
0-383
6 minutes
29151 yuanyi-350
author:yuanyi-350
feat: Corollary of Hahn–Banach theorem In this PR, I have proved [Rudin, *Functional Analysis* (Theorem 3.7)][rudin1991] which is a step in proving the Closed Range Theorem. Also, I have added tags for the corresponding theorems in Rudin to mathlib. 3.7 Theorem. Suppose B is a convex, balanced, closed set in a locally convex space $X, x_0 \in X$, but $x_0 \notin B$. Then there exists $\Lambda \in X^*$ such that $|\Lambda x| \leq 1$ for all $x \in B$, but $\Lambda x_0>1$ proof. Since $B$ is closed and convex, we can apply (b) of Theorem 3.4, with $A=\{ x_0 \}$ , to obtain $\Lambda_1 \in X^*$ such that $\Lambda_1 x_0=r e^{i \theta}$ lies outside the closure $K$ of $\Lambda_1(B)$. Since $B$ is balanced, so is $K$. Hence there exists $s, 0 List.Vector.* - ... Deletions: - Nat.bit1_add_bit1 - ... Any other comments you want to keep out of the PR commit should go below the `---`, and placed outside this HTML comment, or else they will be invisible to reviewers. If this PR depends on other PRs, please list them below this comment, using the following format: - [ ] depends on: #xyz [optional extra text] --> [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor awaiting-author blocked-by-other-PR 70/3 Mathlib/Analysis/NormedSpace/HahnBanach/Separation.lean,Mathlib/Analysis/RCLike/Lemmas.lean,Mathlib/Topology/Order/OrderClosed.lean 3 14 ['faenuccio', 'fpvandoorn', 'github-actions', 'mathlib4-dependent-issues-bot', 'mcdoll', 'themathqueen', 'yuanyi-350'] faenuccio
assignee:faenuccio
8-71452
8 days ago
8-71454
8 days ago
21-29486
21 days
26304 Raph-DG
author:Raph-DG
feat(AlgebraicGeometry): Definition of algebraic cycles In this PR we define algebraic cycles on a scheme X to be functions from the points of X to the integers with locally finite support. We introduce some API for this including grading by height in the specialization order, and a definition of the pushforward. - [ ] depends on: #26225 - [ ] depends on: #26259 --- Note there are a couple of things I'm not quite sure about which I've mentioned in the comments, like how I'm not sure how to make the proof of map_locally finite more manageable and so on. Any comment on these (or anything else!) would be greatly appreciated. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry RFC merge-conflict blocked-by-other-PR 439/22 Mathlib.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/AlgebraicCycle.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/AlgebraicGeometry/Scheme.lean,Mathlib/Topology/LocallyFinsupp.lean 6 6 ['Raph-DG', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
8-64982
8 days ago
60-61335
1 month ago
0-366
6 minutes
27579 RemyDegenne
author:RemyDegenne
feat: risk of an estimator, DeGroot statistical information, total variation distance This is an overview PR and will be cut into several pieces. It contains definitions and properties of: - the risk and Bayes risk of an estimator, in general and then specialized to binary hypothesis testing - the DeGroot statistical information between two measures, as well as a generalization for a kernel on more than two outcomes - the total variation distance between measures, defined as a special case of the DeGroot statistical information Co-authored-by: Lorenzo Luccioli @LorenzoLuccioli From the TestingLowerBounds project --- - [x] depends on: #27583 - [x] depends on: #27584 - [x] depends on: #27585 - [x] depends on: #27586 - [x] depends on: #27587 - [x] depends on: #27591 - [x] depends on: #28081 - [x] depends on: #28082 - [x] depends on: #28117 - [x] depends on: #28341 - [x] depends on: #29137 - [ ] depends on: #29143 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability merge-conflict blocked-by-other-PR WIP 1956/17 Mathlib.lean,Mathlib/InformationTheory/TotalVariation/Basic.lean,Mathlib/Probability/Decision/AuxLemmas.lean,Mathlib/Probability/Decision/BayesEstimator.lean,Mathlib/Probability/Decision/Binary.lean,Mathlib/Probability/Decision/BoolMeasure.lean,Mathlib/Probability/Decision/DeGrootInfo.lean,Mathlib/Probability/Decision/Risk/Basic.lean,Mathlib/Probability/Decision/Risk/Countable.lean,Mathlib/Probability/Decision/RiskIncrease.lean,Mathlib/Probability/Decision/ZeroOneLoss.lean,Mathlib/Probability/Kernel/Composition/Comp.lean,Mathlib/Probability/Kernel/Composition/MapComap.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/Probability/Kernel/RadonNikodym.lean 15 6 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
8-63157
8 days ago
21-37031
21 days ago
0-1
1 second
29610 llllvvuu
author:llllvvuu
feat(LinearAlgebra): define LinearMap.Eigenbasis Some theorems are left TODO for follow-up work. The definition is from @eric-wieser ([#Is there code for X? > diagonalizable linear maps @ 💬](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/diagonalizable.20linear.20maps/near/539163222)). Co-authored-by: Aristotle Harmonic --- - [x] depends on: #29420 (golfs some `[Nontrivial R]` assumptions) - [ ] depends on: #29791 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR
label:t-algebra$
458/5 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Spectrum.lean,Mathlib/LinearAlgebra/Eigenbasis.lean,Mathlib/LinearAlgebra/FreeModule/PID.lean,Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/Order/CompleteLattice/Basic.lean 6 29 ['github-actions', 'kckennylau', 'llllvvuu', 'mathlib4-dependent-issues-bot'] nobody
8-37101
8 days ago
15-4966
15 days ago
3-22329
3 days
29942 smmercuri
author:smmercuri
feat(InfinitePlace/Completion): embeddings of `w.Completion` factor through embeddings of `v.Completion` when `w` extends `v` If `w : v.Extension L` is an extension of `v : InfinitePlace K` to `L`, then `extensionEmbedding w : L →+* ℂ` factors through `extensionEmbedding v : K →+* ℂ`. --- - [ ] depends on: #27978 - [ ] depends on: #29969 - [x] depends on: #29944 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) FLT blocked-by-other-PR 199/58 Mathlib/Analysis/Normed/Field/WithAbs.lean,Mathlib/NumberTheory/NumberField/AdeleRing.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Completion.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Ramification.lean,Mathlib/Topology/MetricSpace/Completion.lean 5 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
8-35587
8 days ago
9-39223
9 days ago
0-1122
18 minutes
29934 smmercuri
author:smmercuri
feat(Field/WithAbs): the lift of a ring homomorphism from `WithAbs v` to `WithAbs w` to their completions If `σ` is a compatible ring homomomorphism between `WithAbs v` and `WithAbs w` then this extends to a natural ring homomorphism between completions `v.Completion` and `w.Completion`. Also fix some defeq abuse in `Field/WithAbs`. --- - [ ] depends on: #29969 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) FLT blocked-by-other-PR WIP 104/48 Mathlib/Analysis/Normed/Field/WithAbs.lean,Mathlib/NumberTheory/NumberField/AdeleRing.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Completion.lean,Mathlib/Topology/MetricSpace/Completion.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
8-35586
8 days ago
8-39049
8 days ago
0-2230
37 minutes
29997 xroblot
author:xroblot
feat(CyclotomicFields): general formula for the discriminant Add the general formula for the (absolute value of the) discriminant of a cyclotomic field: ```lean theorem natAbs_absdiscr (n : ℕ) [hn : NeZero n] [hK : IsCyclotomicExtension {n} ℚ K] : (discr K).natAbs = (n ^ n.totient / ∏ p ∈ n.primeFactors, p ^ (n.totient / (p - 1))) ``` --- - [ ] depends on: #29665 - [ ] depends on: #29943 large-import t-number-theory blocked-by-other-PR 1165/69 Mathlib.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/FieldTheory/LinearDisjoint.lean,Mathlib/FieldTheory/Minpoly/IsIntegrallyClosed.lean,Mathlib/LinearAlgebra/BilinearForm/Properties.lean,Mathlib/NumberTheory/Cyclotomic/Basic.lean,Mathlib/NumberTheory/Cyclotomic/Rat.lean,Mathlib/NumberTheory/NumberField/Discriminant/Different.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/DedekindDomain/IntegralClosure.lean,Mathlib/RingTheory/DedekindDomain/LinearDisjoint.lean,Mathlib/RingTheory/FractionalIdeal/Extended.lean,Mathlib/RingTheory/Ideal/GoingUp.lean,Mathlib/RingTheory/Ideal/Norm/RelNorm.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/FractionRing.lean,Mathlib/RingTheory/Trace/Basic.lean,Mathlib/RingTheory/UniqueFactorizationDomain/NormalizedFactors.lean 20 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
7-62854
7 days ago
7-62855
7 days ago
0-2027
33 minutes
29943 xroblot
author:xroblot
feat(NumberField): discriminant in disjoint extensions We prove the following results: - If `K₁` and `K₂` are linear disjoint number fields with coprime different ideals, then ``` (discr L).natAbs = (discr K₁).natAbs ^ Module.finrank ℚ K₂ * (discr K₂).natAbs ^ Module.finrank ℚ K₁ ``` where `L = K₁K₂`. - If `K₁` and `K₂` are number fields with coprime discriminant and `K₁/ℚ` Galois, then `K₁` and `K₂` are linear disjoint. --- - [ ] depends on: #29940 - [ ] depends on: #29885 - [ ] depends on: #27273 large-import t-number-theory merge-conflict blocked-by-other-PR 1022/67 Mathlib.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/FieldTheory/LinearDisjoint.lean,Mathlib/FieldTheory/Minpoly/IsIntegrallyClosed.lean,Mathlib/LinearAlgebra/BilinearForm/Properties.lean,Mathlib/NumberTheory/NumberField/Discriminant/Different.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/DedekindDomain/IntegralClosure.lean,Mathlib/RingTheory/DedekindDomain/LinearDisjoint.lean,Mathlib/RingTheory/FractionalIdeal/Extended.lean,Mathlib/RingTheory/Ideal/GoingUp.lean,Mathlib/RingTheory/Ideal/Norm/RelNorm.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/FractionRing.lean,Mathlib/RingTheory/Trace/Basic.lean,Mathlib/RingTheory/UniqueFactorizationDomain/NormalizedFactors.lean 18 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
7-61494
7 days ago
7-61495
7 days ago
0-3930
1 hour
30001 vihdzp
author:vihdzp
feat: concept generated by set of objects/attributes --- - [ ] depends on: #29996 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order blocked-by-other-PR 270/99 Mathlib/Order/Concept.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
7-59250
7 days ago
7-59251
7 days ago
0-375
6 minutes
26966 vihdzp
author:vihdzp
feat: the Dedekind-MacNeille completion We define the type of Dedekind cuts `DedekindCut α` as an abbreviation for `Concept α α (· ≤ ·)`. We prove that it's the smallest complete lattice containing a given partial order, in the sense that any embedding from `α` into a complete lattice factors through it. --- The idea here is that one should be able to work with Dedekind cuts without knowing what a concept lattice is; whence the abbreviation. See [Zulip](https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Dedekind-MacNeille.20completion.2E/near/528004148). - [ ] depends on: #30001 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order blocked-by-other-PR 500/104 Mathlib.lean,Mathlib/Order/Completion.lean,Mathlib/Order/Concept.lean 3 12 ['YaelDillies', 'github-actions', 'leanprover-community-bot-assistant', 'linesthatinterlace', 'mathlib4-dependent-issues-bot', 'vihdzp'] nobody
7-52929
7 days ago
7-54452
7 days ago
0-19769
5 hours
23124 YaelDillies
author:YaelDillies
feat(MetricSpace): nets Define nets, which are a quantitative notion of compactness in a metric space. From my PhD (MiscYD) --- - [x] depends on: #23180 - [ ] depends on: #23181 - [ ] depends on: #23920 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-CI blocked-by-other-PR 1011/695 Mathlib.lean,Mathlib/Data/Rel.lean,Mathlib/Data/Rel/Cover.lean,Mathlib/Data/Rel/Separated.lean,Mathlib/Dynamics/TopologicalEntropy/CoverEntropy.lean,Mathlib/Dynamics/TopologicalEntropy/DynamicalEntourage.lean,Mathlib/Dynamics/TopologicalEntropy/NetEntropy.lean,Mathlib/Dynamics/TopologicalEntropy/Semiconj.lean,Mathlib/Dynamics/TopologicalEntropy/Subset.lean,Mathlib/InformationTheory/Hamming.lean,Mathlib/MeasureTheory/Measure/RegularityCompacts.lean,Mathlib/Topology/MetricSpace/BundledFun.lean,Mathlib/Topology/MetricSpace/Cover.lean,Mathlib/Topology/MetricSpace/MetricSeparated.lean,Mathlib/Topology/MetricSpace/PiNat.lean,Mathlib/Topology/Metrizable/Uniformity.lean,Mathlib/Topology/UniformSpace/Ascoli.lean,Mathlib/Topology/UniformSpace/Basic.lean,Mathlib/Topology/UniformSpace/Cauchy.lean,Mathlib/Topology/UniformSpace/Compact.lean,Mathlib/Topology/UniformSpace/CompactConvergence.lean,Mathlib/Topology/UniformSpace/Completion.lean,Mathlib/Topology/UniformSpace/Defs.lean,Mathlib/Topology/UniformSpace/DiscreteUniformity.lean,Mathlib/Topology/UniformSpace/Equicontinuity.lean,Mathlib/Topology/UniformSpace/HeineCantor.lean,Mathlib/Topology/UniformSpace/OfCompactT2.lean,Mathlib/Topology/UniformSpace/OfFun.lean,Mathlib/Topology/UniformSpace/Separation.lean,Mathlib/Topology/UniformSpace/Ultra/Basic.lean,Mathlib/Topology/UniformSpace/Ultra/Completion.lean,Mathlib/Topology/UniformSpace/Ultra/Constructions.lean,Mathlib/Topology/UniformSpace/UniformApproximation.lean,Mathlib/Topology/UniformSpace/UniformConvergence.lean,Mathlib/Topology/UniformSpace/UniformEmbedding.lean 35 21 ['D-Thomine', 'YaelDillies', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
7-37460
7 days ago
7-37481
7 days ago
1-52822
1 day
27314 pechersky
author:pechersky
feat(TopologyValued): `Valued` based on a range topology Switch from a topology based on `fun γ : Γ₀ˣ => (v.ltAddSubgroup γ : AddSubgroup R)` to ``` fun rs : {rs : R × R // v rs.1 ≠ 0 ∧ v rs.2 ≠ 0} ↦ (v.ltAddSubgroup (Units.mk0 (v rs.val.2 / v rs.val.1) (by simp [rs.prop])) : AddSubgroup R) ``` This is in preparation for using `IsValuativeTopology` instead. In fact, that basis is precisely what `ValuativeTopology` asserts. `Valued.mk'` is kept, we do not yet rely on `IsValuativeTopology` and `UniformSpace`. The new `Valued` behaves the same way as it did before for `MulArchimedean` valuation codomains, which are all of the current in-mathlib uses of `Valued`. This is, for rank-one valuations. For valuations which rank one, but do not pass to the whole codomain, there are helper lemmas to discuss open/closed/clopen sets. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #27264 - [x] depends on: #27265 - [ ] depends on: #27163 - [ ] depends on: #27339 t-topology merge-conflict blocked-by-other-PR 733/259 Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/NumberTheory/FunctionField.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/Valuation/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuedField.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/Valued/WithZeroMulInt.lean 12 9 ['github-actions', 'kckennylau', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
7-20400
7 days ago
54-39882
1 month ago
0-22127
6 hours
29777 yuanyi-350
author:yuanyi-350
feat(Functional Analysis) : Closed Range Theorem - [ ] depends on: #29151 [Corollary of Hahn-Banach theorem] - [ ] depends on: #29776 [refactor ContinuousLinearMap.isOpenMap by separating it into sublemmas] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor t-analysis awaiting-author blocked-by-other-PR WIP 250/27 Mathlib.lean,Mathlib/Analysis/Normed/Operator/Banach.lean,Mathlib/Analysis/Normed/Operator/ClosedRange.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Separation.lean,Mathlib/Analysis/RCLike/Lemmas.lean,Mathlib/Topology/Order/OrderClosed.lean 6 2 ['github-actions', 'mathlib4-dependent-issues-bot'] faenuccio
assignee:faenuccio
6-74926
6 days ago
13-5886
13 days ago
0-634
10 minutes
30010 xroblot
author:xroblot
feat(CyclotomicFields): generalize `IsPrimitiveRoot.integralPowerBasis` to all (nonzero) integers --- - [ ] depends on: #29997 large-import t-number-theory blocked-by-other-PR 1278/87 Mathlib.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/FieldTheory/LinearDisjoint.lean,Mathlib/FieldTheory/Minpoly/IsIntegrallyClosed.lean,Mathlib/LinearAlgebra/BilinearForm/Properties.lean,Mathlib/NumberTheory/Cyclotomic/Basic.lean,Mathlib/NumberTheory/Cyclotomic/Rat.lean,Mathlib/NumberTheory/NumberField/Discriminant/Different.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/DedekindDomain/IntegralClosure.lean,Mathlib/RingTheory/DedekindDomain/LinearDisjoint.lean,Mathlib/RingTheory/FractionalIdeal/Extended.lean,Mathlib/RingTheory/Ideal/GoingUp.lean,Mathlib/RingTheory/Ideal/Norm/RelNorm.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/FractionRing.lean,Mathlib/RingTheory/Trace/Basic.lean,Mathlib/RingTheory/UniqueFactorizationDomain/NormalizedFactors.lean 20 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
6-69993
6 days ago
6-69994
6 days ago
0-1706
28 minutes
29992 vlad902
author:vlad902
feat(Order): finite (Max)Chains always contains a top/max element - [ ] depends on: #29835 [optional extra text] - [ ] depends on: #29993 [optional extra text] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-order blocked-by-other-PR 35/0 Mathlib/Order/Preorder/Chain.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
6-32925
6 days ago
7-70912
7 days ago
0-466
7 minutes
29980 mans0954
author:mans0954
refactor(RingTheory/Polynomial/Resultant/Quadratic): Re-implement QuadraticDiscriminant for R[X] Re-implement `Algebra/QuadraticDiscriminant` for polynomials. [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/discriminants.20of.20low.20degree.20polynomials/with/538010519) --- - [ ] depends on: #29981 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 214/0 Mathlib.lean,Mathlib/RingTheory/Polynomial/Resultant/Quadratic.lean,Mathlib/RingTheory/Polynomial/SmallDegreeVieta.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
6-27789
6 days ago
8-15079
8 days ago
0-3907
1 hour
29921 mans0954
author:mans0954
refactor(RingTheory/Polynomial/SmallDegreeVieta) : Convert to {p : R[X]} (hp : p.natDegree = 2) Convert `RingTheory/Polynomial/SmallDegreeVieta` from `{a b c : R} (C a * X ^ 2 + C b * X + C c)` to `{p : R[X]} (hp : p.natDegree = 2)` (see [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/discriminants.20of.20low.20degree.20polynomials/with/538010519)) --- - [ ] depends on: #29981 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR 81/60 Mathlib/RingTheory/Polynomial/SmallDegreeVieta.lean 1 6 ['JovanGerb', 'github-actions', 'kckennylau', 'mans0954', 'mathlib4-dependent-issues-bot', 'vihdzp'] nobody
6-22007
6 days ago
8-15070
8 days ago
1-7032
1 day
29985 urkud
author:urkud
feat: exterior derivative of a differential form --- - [ ] depends on: #29957 - [x] depends on: #29984 - [x] depends on: #29986 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis blocked-by-other-PR 362/0 Mathlib.lean,Mathlib/Analysis/Calculus/EDeriv/Basic.lean,Mathlib/Analysis/NormedSpace/Alternating/Basic.lean,Mathlib/Analysis/NormedSpace/Alternating/Uncurry/Fin.lean 4 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
6-8595
6 days ago
6-8620
6 days ago
0-1264
21 minutes
28786 mitchell-horner
author:mitchell-horner
feat(Combinatorics/SimpleGraph): restate Turán's theorem in terms of `extremalNumber` Restates the existing proof of Turán's theorem in terms of the extremal numbers of `⊤`: The `turanGraph` is, up to isomorphism, the unique extremal graph forbidding `⊤`. --- - [ ] depends on: #28719 - [x] depends on: #28785 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics blocked-by-other-PR 63/46 Mathlib/Combinatorics/SimpleGraph/Extremal/Turan.lean 1 6 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
5-64663
5 days ago
5-68121
5 days ago
2-84097
2 days
29868 themathqueen
author:themathqueen
feat(LinearAlgebra/Matrix/PosDef): add `posSemidef_sum` --- - [x] depends on: #29862 - [ ] depends on: #29864 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR
label:t-algebra$
84/53 Mathlib/Algebra/Order/BigOperators/Group/Finset.lean,Mathlib/Algebra/Order/BigOperators/Group/Multiset.lean,Mathlib/Algebra/Order/Group/Int/Sum.lean,Mathlib/Data/NNRat/BigOperators.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/Tactic/Positivity/Finset.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'themathqueen'] nobody
5-56055
5 days ago
12-25147
12 days ago
0-24
24 seconds
30050 themathqueen
author:themathqueen
chore(Analysis/Matrix/Order): `IsStrictlyPositive x` iff `x.PosDef` --- - [ ] depends on: #29896 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed large-import t-algebra blocked-by-other-PR
label:t-algebra$
311/278 Mathlib.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/Matrix/Order.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Basic.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,MathlibTest/PosDef.lean 7 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
5-53445
5 days ago
5-54579
5 days ago
0-12
12 seconds
26315 EtienneC30
author:EtienneC30
feat: continuous sesquilinear forms Introduce an abbreviation `ContinuousSesquilinForm` for `E →L⋆[𝕜] E →L[𝕜] 𝕜`. This is needed in the Brownian motion project, as a Gaussian measure is represented by its mean and its covariance bilinear form, which is a positive semidefinite bilinear form. --- - [x] depends on: #26274 - [ ] depends on: #28052 From Brownian motion [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis blocked-by-other-PR 432/0 Mathlib.lean,Mathlib/Analysis/NormedSpace/ContinuousSesquilinForm.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Hermitian.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean,Mathlib/LinearAlgebra/SesquilinearForm/IsPosSemidef.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean 7 10 ['EtienneC30', 'RemyDegenne', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
5-51915
5 days ago
5-51939
5 days ago
0-0
0 seconds
22059 grunweg
author:grunweg
feat: manifolds with smooth boundary Needs polish, and closing the remaining sorries (or deciding they can be postponed later). From my bordism theory project. --- - [x] depends on: #22070 - [x] depends on: #22128 - [x] depends on: #22131 - [x] depends on: #22082 - [x] depends on: #22113 - [x] depends on: #22105 - [x] depends on: #26099 - [x] depends on: #30049 (preliminary code clean-up) - [ ] depends on: #29589 - [ ] depends on the analogous result for direct sums, still to be written - [ ] depends on #23040 for the mathlib-level definition of smooth immersions and embeddings [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict blocked-by-other-PR WIP 603/0 Mathlib.lean,Mathlib/Geometry/Manifold/HasSmoothBoundary.lean 2 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
5-51463
5 days ago
175-45398
5 months ago
0-0
0 seconds
27493 themathqueen
author:themathqueen
feat(RingTheory/Coalgebra): define Frobenius algebra A Frobenius algebra `A` has the structure of both an algebra and a coalgebra such that: `(mul ⊗ id) ∘ assoc.symm ∘ (id ⊗ comul) = comul ∘ mul = (id ⊗ mul) ∘ assoc ∘ (comul ⊗ id)`. In diagrams this law looks like: ![](https://ncatlab.org/nlab/files/frobenius_laws.jpg) It suffices to show that `(mul ⊗ id) ∘ assoc.symm ∘ (id ⊗ comul) = (id ⊗ mul) ∘ assoc ∘ (comul ⊗ id)` (the proof of this is ugly). --- - [ ] depends on: #27567 - [x] depends on: #27569 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR 224/0 Mathlib.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean,Mathlib/RingTheory/Coalgebra/Frobenius.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
5-49565
5 days ago
60-34320
1 month ago
2-700
2 days
29274 Jlh18
author:Jlh18
feat(CategoryTheory): HasLimits instance on Grpd - Show that the quotient of a groupoid is a groupoid in `CategoryTheory.Quotient`. - Define the free groupoid on a category in `CategoryTheory.Category.FreeGroupoid` and hence define the free-forgetful adjunction between `Grpd` and `Cat`. - Use the free-forgetful adjunction to show that `Grpd` has all limits in `CategoryTheory.Category.Grpd.Limit`, as a reflective subcategory of `Cat`. - [ ] depends on: #29250[Renamings in Grpd file] - [ ] depends on: #29278[Quotient of a groupoid is a groupoid] - [ ] depends on: #29279[Free forgetful adjunction] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor blocked-by-other-PR 246/1 Mathlib.lean,Mathlib/CategoryTheory/Category/FreeGroupoid.lean,Mathlib/CategoryTheory/Category/Grpd.lean,Mathlib/CategoryTheory/Groupoid/Grpd/Limit.lean,Mathlib/CategoryTheory/Quotient.lean 5 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-57219
4 days ago
4-57227
4 days ago
0-340
5 minutes
28685 mitchell-horner
author:mitchell-horner
feat(Combinatorics/SimpleGraph): prove the minimal-degree version of the Erdős-Stone theorem Proves the minimal degree-version of the Erdős-Stone theorem: If `G` has a minimal degree of at least `(1 - 1 / r + o(1)) * card V`, then `G` contains a copy of a `completeEquipartiteGraph` in `r + 1` parts each of size `t`. The double-counting construction from the proof is available in `namespace ErdosStone`. --- - [ ] depends on: #25843 - [x] depends on: #27597 - [ ] depends on: #27599 - [x] depends on: #28443 - [x] depends on: #28445 - [x] depends on: #28446 - [x] depends on: #28447 Similar to #25841 I've tried to make as much of the double-counting construction *not* private as possible. I figure it is useful to borrow constructions between proofs. If this is just considered garbage and bloat and better left private. Please let me know. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics merge-conflict blocked-by-other-PR WIP 582/14 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/ErdosStoneSimonovits.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Operations.lean,Mathlib/Data/Finset/Union.lean,Mathlib/Data/Nat/Cast/Order/Field.lean 10 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-55756
4 days ago
36-47799
1 month ago
0-46
46 seconds
27706 xroblot
author:xroblot
feat(RingTheory/Localization/AtPrime): inertia degree and ramification index are preserved by localization Let `R ⊆ S` be an extension of rings and `p` be a prime ideal of `R`. Denote by `Rₚ` the localization of `R` at the complement of `p` and by `Sₚ` the localization of `S` at the (image) of the complement of `p`. In this PR, we prove that the bijection between the (nonzero) prime ideals of `Sₚ` and the prime ideals of `S` above `p` preserves the residual degree and the ramification index. --- - [x] depends on: #27794 - [x] depends on: #27796 - [x] depends on: #27798 - [x] depends on: #28526 - [ ] depends on: #29322 t-ring-theory blocked-by-other-PR 508/122 Mathlib.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/RingTheory/DedekindDomain/Instances.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/Localization/AtPrime/Basic.lean,Mathlib/RingTheory/Localization/AtPrime/Extension.lean,Mathlib/RingTheory/Trace/Quotient.lean 8 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-43314
4 days ago
4-43314
4 days ago
0-1400
23 minutes
28895 yury-harmonic
author:yury-harmonic
feat(NumberTheory): prove Zsigmondy's theorem --- - [x] depends on: #28879 - [x] depends on: #28825 - [ ] depends on: #28833 - [x] depends on: #28888 - [x] depends on: #28830 - [x] depends on: #28765 - [x] depends on: #28886 - [x] depends on: #28934 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 1412/18 Mathlib.lean,Mathlib/Algebra/MvPolynomial/Eval.lean,Mathlib/Algebra/MvPolynomial/Expand.lean,Mathlib/NumberTheory/Zsigmondy.lean 4 7 ['dupuisf', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'yury-harmonic'] nobody
4-42335
4 days ago
35-63144
1 month ago
0-0
0 seconds
29000 JovanGerb
author:JovanGerb
feat(Tactic/Push): add basic tags and tests This PR adds basic `@[push]` tags, and expands the `push` test file. --- - [ ] depends on: #21965 - [ ] depends on: #30038 - [ ] depends on: #30039 - [ ] depends on: #30042 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 290/196 Archive/Imo/Imo1988Q6.lean,Archive/ZagierTwoSquares.lean,Counterexamples/Phillips.lean,Mathlib/Algebra/Group/Action/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/ListOfFn.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Notation/Pi/Defs.lean,Mathlib/Algebra/Order/Module/HahnEmbedding.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Oscillation.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/Log/PosLog.lean,Mathlib/CategoryTheory/Galois/Basic.lean,Mathlib/Combinatorics/Colex.lean,Mathlib/Combinatorics/Enumerative/InclusionExclusion.lean,Mathlib/Combinatorics/Hall/Finite.lean,Mathlib/Combinatorics/Matroid/Dual.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Data/Analysis/Filter.lean,Mathlib/Data/Finset/BooleanAlgebra.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Finset/Defs.lean,Mathlib/Data/Finset/Empty.lean,Mathlib/Data/Finset/Filter.lean,Mathlib/Data/Finset/Insert.lean,Mathlib/Data/Finset/Lattice/Basic.lean,Mathlib/Data/Finset/Max.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Finset/SDiff.lean,Mathlib/Data/Finset/Sups.lean,Mathlib/Data/Finset/Union.lean,Mathlib/Data/Fintype/Defs.lean,Mathlib/Data/Nat/Cast/Basic.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Nat/PrimeFin.lean,Mathlib/Data/Real/Archimedean.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Data/Set/Prod.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Defs.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/RootSystem/Base.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Order.lean,Mathlib/MeasureTheory/Constructions/Cylinders.lean,Mathlib/MeasureTheory/Constructions/Polish/Basic.lean,Mathlib/MeasureTheory/Covering/Vitali.lean,Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/MeasureTheory/Measure/Typeclasses/Finite.lean,Mathlib/MeasureTheory/SetAlgebra.lean,Mathlib/NumberTheory/AbelSummation.lean,Mathlib/NumberTheory/Divisors.lean,Mathlib/NumberTheory/ModularForms/DedekindEta.lean,Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/Order/CompleteLatticeIntervals.lean,Mathlib/Order/Interval/Finset/Defs.lean,Mathlib/Order/Interval/Set/Defs.lean,Mathlib/Order/LiminfLimsup.lean,Mathlib/Order/PartialSups.lean,Mathlib/Order/SetNotation.lean,Mathlib/Order/UpperLower/Basic.lean,Mathlib/Probability/Moments/ComplexMGF.lean,Mathlib/Probability/ProductMeasure.lean,Mathlib/RingTheory/HahnSeries/Summable.lean,Mathlib/RingTheory/Nilpotent/Defs.lean,Mathlib/Topology/Algebra/ProperAction/ProperlyDiscontinuous.lean,Mathlib/Topology/Bornology/BoundedOperation.lean,Mathlib/Topology/Bornology/Constructions.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/Compactness/Lindelof.lean,Mathlib/Topology/Connected/Clopen.lean,Mathlib/Topology/ContinuousMap/BoundedCompactlySupported.lean,Mathlib/Topology/EMetricSpace/BoundedVariation.lean,Mathlib/Topology/GDelta/MetrizableSpace.lean,Mathlib/Topology/JacobsonSpace.lean,Mathlib/Topology/Order/Compact.lean,Mathlib/Topology/Order/HullKernel.lean,Mathlib/Topology/Perfect.lean,Mathlib/Topology/Sets/CompactOpenCovered.lean,MathlibTest/push.lean 87 6 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-36134
4 days ago
4-36406
4 days ago
4-45292
4 days
27391 robin-carlier
author:robin-carlier
feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): pseudofunctoriality structure of categorical pullback squares Using pseudofunctoriality of the construction `CatCommSqOver`, we show that categorical pullback squares have pseudofunctorial-like structures: given a `CatCommSq T L R B` and a `CatPullbackSq T' L' R' B'`, and a `CatCospanTransform R B R' B'`, there is a functor `CatPullbackSq.functorOfTransform` between the top left corners of the two squares. We give `CatCommSq` instances that relates this functor with other constructions such as `CatCommSqOver.transform`. Similarly, we construct `CatPullbackSq.functorOfTransform₂`, that maps morphisms of `CatCospanTransforms` to natural transformations. Finally, we show that `functorOfTransform` respects identities and compositions. We do not yet prove that all of this data satisfies all the expected properties of pseudofunctors: this will be the content of a follow-up PR. --- - [ ] depends on: #27214 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict blocked-by-other-PR 1090/1 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-36084
4 days ago
4-36085
4 days ago
0-264
4 minutes
27432 robin-carlier
author:robin-carlier
feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): pseudofunctoriality of categorical pulback squares In this PR, we show that the "unbundled pseudofunctor" data constructed in #27391 satisfy the axioms of an actual "unbundled pseudo-functor". This is intended to give all the required coherence for a formal bicategory-like proof of the fact that `CatCospanAdjunction`s from #26578 (resp. `CatCospanEquivalence`s from #26579) promote to adjunctions (resp. equivalences) between the top left corners of categorical pullback squares. --- - [ ] depends on: #27391 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict blocked-by-other-PR 1244/1 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-36082
4 days ago
4-36083
4 days ago
0-1056
17 minutes
27481 robin-carlier
author:robin-carlier
feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): adjunctions and equivalences of categorical pullback squares We show that a `CatCospanAdjunction` (resp `CatCospanEquivalence`) induces adjunctions (resp. equivalences) of the categories that sit at the top left corners of categorical pullback squares via the pseudofunctoriality proved in #27432. Thanks to the lemmas that proves that categorical pullback squares are fully pseudofunctorial, the proof is purely formal ("a pseudofunctor maps adjunctions (resp. equivalences) to adjunctions (resp. equivalences)"), rather than being a painful computation for the triangle equalities. In particular, the results here show that two categorical pullback squares with equivalent "underlying categorical cospan" are equivalent, which realizes the equivalence-invariance of the notion of categorical pullbacks. We do not yet show that a (not-necessarily pullback) `CatCommSq T L R B` equivalent to a `CatPullbackSquare T' L' R' B'` via a `CatCospanEquivalence R B R' B'` is also a `CatPullbackSquare`: this will be the content of a follow-up PR. --- - [ ] depends on: #27432 - [ ] depends on: #26579 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory merge-conflict blocked-by-other-PR 1829/1 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-36080
4 days ago
4-36081
4 days ago
0-49
49 seconds
27686 robin-carlier
author:robin-carlier
feat(CategoryTheory/Limits/Shapes/Pullback/Categorical/Square): more API for `CatPullbackSquare` In this PR, we provide more API around the notion of categorical pullback squares. Having established the pseudofunctoriality of the notion in #27432, we characterize the behaviour of the equivalence `CatPullbackSquare.functorEquiv (π₁ R B) (π₂ R B) R B X : X ⥤ R ⊡ B ≌ CatCommSqOver R B X` via various (d)simp lemmas. This ports all the pseudofunctoriality and equivalence-invariance results of `CatPullbackSquare` to `CategoricalPullback`. We also show this equivalence is isomorphic to the one from `CategoricalPullback.functorEquiv`. Unfortunately, this small duplication is necessary, as `CatPullbackSquare.functorEquiv` is bulit using `CategoricalPullback.functorEquiv`. The equivalence `CategoricalPullback.functorEquiv` is now an implementation detail, the idiomatic way is to use `CatPullbackSquare.functorEquiv`; docstrings are updated accordingly. This deprecates some constructions and lemmas for `CategoricalPullback`: they are now special case of the API that is available for any categorical pullback square. --- - [ ] depends on: #27481 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory merge-conflict blocked-by-other-PR 2245/74 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 4 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-35955
4 days ago
unknown
unknown
27687 robin-carlier
author:robin-carlier
feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): squares equivalent to a `CatPullbackSquare` We provide the last remaining piece of the "equivalence-invariance" of categorical pullback squares: given a `CatCommSq (T : C₁ ⥤ _) L R B`, a `CatPullbackSquare (T' : D₁ ⥤ _) L' R' B'`, a `ψ : CatCospanEquivalence R B R' B'` and an equivalence `C₁ ≌ D₁` that identifies to the functor induced by `ψ`, the `CatCommSq T L R B` can be promoted to a `CatPullbackSquare T L R B'`. In other words: a `CatCommSq` that is equivalent to a `CatPullbackSquare` is a `CatPullbackSquare`. --- - [ ] depends on: #27686 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory merge-conflict blocked-by-other-PR 2318/74 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 4 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-35953
4 days ago
unknown
unknown
27688 robin-carlier
author:robin-carlier
feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): coherence statement for `CatPullbackSquare.inverse` This PR records a "coherence" statement for `CatPullbackSquares`: it bridges the gap between the user-provided `inverse` field of the `CatPullbackSquare` structure, and the other way one can deduce an equivalence between the top left corner of the square and a categorical pullback (via the pseudofunctoriality of categorical pullback squares induced by the identity `CatCospanTransform`). We show the two possible natural isomorphisms on the inverses of the equivalences are in fact the same (hence the term "coherence"). --- - [ ] depends on: #27686 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory merge-conflict blocked-by-other-PR 2351/74 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 4 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-35952
4 days ago
unknown
unknown
27689 robin-carlier
author:robin-carlier
feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): horizontal pasting calculus for `CatPullbackSquare` Given two categorical commutative squares that can be horizontally pasted, we prove that if the rightmost square is a `CatPullbackSquare`, then the leftmost square is a `CatPullbackSquare` if and only if the horizontal composition of the squares is a `CatPullbackSquare`. This generalizes to `CatPullbackSquare` the well-known "pasting calculus" for pullback squares in a category. The statement is made available both in terms of the `Type`-class `CatPullbackSquare`, and in terms of the `Prop`-class `IsCatPullbackSquare`. --- - [ ] depends on: #27686 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory merge-conflict blocked-by-other-PR 2562/74 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Pasting.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 5 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-35950
4 days ago
unknown
unknown
27690 robin-carlier
author:robin-carlier
feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): vertical pasting calculus for `CatPullbackSquare` We mirror the constructions from #27689 to construct the vertical pasting calculus of `CatPullbackSquares`: given two vertically composable `CatCommSq` such that the bottom one is a `CatPullbackSquare`, the top square is a `CatPullbackSquare` if and only if the vertical composition (the "outer" square) is a `CatPullbackSquare`. --- - [ ] depends on: #27689 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory merge-conflict blocked-by-other-PR 2841/74 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Pasting.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 5 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-35948
4 days ago
unknown
unknown
27740 robin-carlier
author:robin-carlier
feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): pasting calculus for `CategoricalPullback` Specialize the pasting calculus for categorical pullback squares to `CategoricalPullback̀` by providing equivalences of categories `R ⊡ (B₁ ⋙ B₂) ≌ (π₂ R B₂) ⊡ B₁` and `(R₁ ⋙ R₂) ⊡ B ≌ R₁ ⊡ (π₁ R₂ B)`. The `@[simps!]` attribute works wonderfully on these equivalences so that their component all have the expected (d)simp lemmas. --- - [ ] depends on: #27690 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory merge-conflict blocked-by-other-PR 2872/75 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Pasting.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 5 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-35947
4 days ago
4-35948
4 days ago
0-1017
16 minutes
29885 xroblot
author:xroblot
feat(DedekindDomain): lift a basis in a disjoint extension when the different ideals are coprime --- - [ ] depends on: #29770 large-import t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
610/44 Mathlib.lean,Mathlib/FieldTheory/Minpoly/IsIntegrallyClosed.lean,Mathlib/LinearAlgebra/BilinearForm/Properties.lean,Mathlib/RingTheory/Adjoin/PowerBasis.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/DedekindDomain/LinearDisjoint.lean,Mathlib/RingTheory/FractionalIdeal/Extended.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/PowerBasis.lean,Mathlib/RingTheory/Trace/Basic.lean 11 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-34939
4 days ago
4-34940
4 days ago
0-330
5 minutes
30077 agjftucker
author:agjftucker
feat(Analysis/Calculus/ImplicitFunOfBivariate): define implicitFunOfBivariate In this specialization of the implicit function theorem, to an equation involving a curried bivariate function, we make assumptions on each of the partial derivatives individually. Consequently it requires import of results depending on the mean value theorem, and is sequestered to its own file apart from `Implicit.lean`. --- - [ ] depends on: #26985 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis blocked-by-other-PR 264/4 Mathlib.lean,Mathlib/Analysis/Calculus/FDeriv/Partial.lean,Mathlib/Analysis/Calculus/Implicit.lean,Mathlib/Analysis/Calculus/ImplicitFunOfBivariate.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
4-28021
4 days ago
4-28436
4 days ago
0-749
12 minutes
29948 mcdoll
author:mcdoll
feat(Analysis/Fourier): The Fourier transform on L^2 --- - [ ] depends on: #29888 - [ ] depends on: #29860 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR 600/118 Mathlib.lean,Mathlib/Analysis/Distribution/FourierSchwartz.lean,Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/Fourier/FourierTransform.lean,Mathlib/Analysis/Fourier/L2Space.lean,Mathlib/Analysis/InnerProductSpace/Extend.lean,Mathlib/Analysis/InnerProductSpace/LinearPMap.lean,Mathlib/Analysis/Normed/Operator/Completeness.lean,Mathlib/Analysis/Normed/Operator/Extend.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean,docs/undergrad.yaml 11 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-19031
4 days ago
4-19032
4 days ago
0-2667
44 minutes
29517 pechersky
author:pechersky
feat(RingTheory/Torsion): torsion = union of roots of unity with additional API for Associates and rootsOfUnity sups --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #29988 - [x] depends on: #29989 - [ ] depends on: #29990 - [x] depends on: #29991 t-algebra awaiting-author blocked-by-other-PR
label:t-algebra$
216/43 Mathlib.lean,Mathlib/Algebra/Group/Subgroup/Lattice.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/NumberTheory/Cyclotomic/CyclotomicCharacter.lean,Mathlib/NumberTheory/Cyclotomic/Rat.lean,Mathlib/NumberTheory/MulChar/Lemmas.lean,Mathlib/RingTheory/Frobenius.lean,Mathlib/RingTheory/RootsOfUnity/Basic.lean,Mathlib/RingTheory/RootsOfUnity/EnoughRootsOfUnity.lean,Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean,Mathlib/RingTheory/Torsion.lean 11 8 ['chrisflav', 'github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] chrisflav
assignee:chrisflav
4-5274
4 days ago
4-5400
4 days ago
12-51243
12 days
26942 pechersky
author:pechersky
feat(RingTheory/Valuation/ValueGroupIso): isomorphism of value groups when compatible and also to the ValuativeRel's value group by request from comment in https://github.com/leanprover-community/mathlib4/pull/26754#issuecomment-3051770901 - [ ] depends on: #26588 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #26939 - [x] depends on: #26940 - [x] depends on: #26941 t-ring-theory t-order blocked-by-other-PR 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 9 ['faenuccio', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] faenuccio
assignee:faenuccio
4-3139
4 days ago
4-5436
4 days ago
10-67838
10 days
28808 alreadydone
author:alreadydone
experiment: Ideal with Mul only (no Semiring) --- - [ ] depends on: #28807 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) bench-after-CI t-algebra awaiting-CI merge-conflict blocked-by-other-PR
label:t-algebra$
172/120 Mathlib/Algebra/Module/Submodule/Defs.lean,Mathlib/Algebra/Module/Submodule/Lattice.lean,Mathlib/LinearAlgebra/Matrix/Ideal.lean,Mathlib/LinearAlgebra/TensorProduct/Subalgebra.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/DividedPowers/SubDPIdeal.lean,Mathlib/RingTheory/Ideal/Defs.lean,Mathlib/RingTheory/Ideal/Lattice.lean,Mathlib/RingTheory/PrincipalIdealDomain.lean,Mathlib/RingTheory/Spectrum/Prime/RingHom.lean 10 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
3-85519
3 days ago
3-85519
3 days ago
0-0
0 seconds
29792 robertmaxton42
author:robertmaxton42
feat (RelCWComplex): a (relative, concrete) CW complex is the colimit of its skeleta Adds: * `RelCWComplex.Subcomplex.isCoherentWith_cover`: a (relative) CW complex is coherent with any collection of subcomplexes that cover. * `RelCWComplex.descBySkeletonLT` and `descBySkeleton`: construct a continuous map from a complex by providing a family of compatible maps from each skeleton and the base. `CWComplex.descBySkeleton` skips the base. - [ ] depends on: #29788 - [ ] depends on: #29790 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 672/31 Mathlib/Data/Set/Subset.lean,Mathlib/Data/Set/UnionLift.lean,Mathlib/Topology/CWComplex/Classical/Basic.lean,Mathlib/Topology/CWComplex/Classical/Finite.lean,Mathlib/Topology/CWComplex/Classical/Subcomplex.lean,Mathlib/Topology/Category/TopCat/Limits/Products.lean,Mathlib/Topology/Coherent.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/Constructions/SumProd.lean,Mathlib/Topology/ContinuousMap/Basic.lean 10 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'scholzhannah'] nobody
3-50226
3 days ago
15-7561
15 days ago
0-1375
22 minutes
29702 loefflerd
author:loefflerd
feat(Topology): arithmetic subgroups of GL(2, R) are discrete Show that arithmetic subgroups (subgroups of GL2R commensurable with SL2Z) are discrete --- - [x] depends on: #29648 - [x] depends on: #29707 - [ ] depends on: #29743 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR WIP 169/13 Mathlib.lean,Mathlib/Data/Set/Constructions.lean,Mathlib/NumberTheory/ModularForms/ArithmeticSubgroups.lean,Mathlib/Topology/Algebra/ContinuousMonoidHom.lean,Mathlib/Topology/Algebra/IsUniformGroup/DiscreteSubgroup.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/DiscreteSubset.lean 7 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
3-45900
3 days ago
11-26435
11 days ago
0-2
2 seconds
29774 Raph-DG
author:Raph-DG
feat(AlgebraicGeometry): Order of vanishing of elements of the function field of locally noetherian, integral schemes In this PR, we define the order of vanishing of elements of the function field of locally noetherian, integral schemes at points of codimension 1. This is essentially just a wrapper around the API for the order of vanishing for rings (i.e. Ring.ord and Ring.ordFrac), but I think it's good to have this too for usability. --- - [ ] depends on: #29550 - [ ] depends on: #26735 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed blocked-by-other-PR 770/4 Mathlib.lean,Mathlib/AlgebraicGeometry/OrderOfVanishing.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/Order/KrullDimension.lean,Mathlib/RingTheory/DiscreteValuationRing/Basic.lean,Mathlib/RingTheory/OrderOfVanishing/Basic.lean,Mathlib/RingTheory/OrderOfVanishing/Properties.lean,Mathlib/Topology/KrullDimension.lean 8 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
3-45153
3 days ago
3-45175
3 days ago
0-1197
19 minutes
27679 b-reinke
author:b-reinke
feat(GroupTheory/FreeGroup): add pow_left_inj This PR shows that taking n-th powers is an injective function on the free group, using the theory of cyclical reduction. It is the last part of a series of PR on the theory of cyclically reduced words, that were split from #22639. Upstreamed from the [EquationalTheories](https://github.com/teorth/equational_theories) project. - [ ] depends on: #25966 - [ ] depends on: #27672 - [ ] depends on: #27673 - [ ] depends on: #27678 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory merge-conflict blocked-by-other-PR 364/0 Mathlib.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/GroupTheory/FreeGroup/CyclicallyReduced.lean,Mathlib/GroupTheory/FreeGroup/Reduce.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
3-33874
3 days ago
51-38451
1 month ago
0-2410
40 minutes
27678 b-reinke
author:b-reinke
feat(GroupTheory/FreeGroup): reduction theorem for powers This PR adds the theorem `reduce_flatten_replicate`, it describes the reduction of a power of a reduced word in terms of its cyclic reduction. It is a part of a series of PR on the theory of cyclically reduced words. Upstreamed from the [EquationalTheories](https://github.com/teorth/equational_theories) project. - [ ] depends on: #25966 - [ ] depends on: #27672 - [ ] depends on: #27673 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory merge-conflict blocked-by-other-PR 286/0 Mathlib.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/GroupTheory/FreeGroup/CyclicallyReduced.lean,Mathlib/GroupTheory/FreeGroup/Reduce.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
3-33873
3 days ago
51-38452
1 month ago
0-19
19 seconds
26221 grunweg
author:grunweg
Mr. Covariant Derivatives This PR is a work in progress, and will land in individual pieces. Some contributions include - additional API for differentiability of vector bundle sections - finite sums, differences and scalar products of smooth sections are smooth - the same result for mdifferentiable - add missing mdifferentiable congruence lemmas - define smooth local frames of a vector bundle - a general tensoriality criterion (to be cleaned up!) - define covariant derivatives, proving their tensoriality and that convex combinations of these are covariant derivatives - the classification of covariant derivatives over a trivial bundle - additional API for the Lie bracket of vector fields: the product rule (one sorry left!), Lie bracket at zero vanishes - torsion of a connection, torsion-free connections - Gram-Schmidt procedure for sections of a Riemannian vector bundle - orthonormal frames on a Riemannian vector bundle - connections compatible with a metric; definition of the Levi-Civita connection - in progress: existence and uniqueness of the Levi-Civita connection - custom elaborators for sections in a vector bundle and for differentiability/smoothness in a mathlib (inferring the model with corners) --- experimental More to come soon! Joint work with @PatrickMassot; supported by the FMJH. --- - [x] depends on: #26360 - [x] depends on: #26672 - [x] depends on: #26673 - [x] depends on: #26674 - [x] depends on: #26864 (more of a by-product) - [x] depends on: #26865 - [x] depends on: #26866 - [x] depends on: #26870 - [x] depends on: #26871 - [x] depends on: #26671 - [x] depends on: #26676 - [x] depends on: #26677 - [x] depends on: #26678 - [x] depends on: #26686 - [x] depends on: #26687 - [x] depends on: #26688 - [x] depends on: #26702 - [x] depends on: #26709 - [x] depends on: #26734 - [ ] depends on: #26743 (still WIP) - [x] depends on: #26894 - [x] depends on: #26921 - [x] depends on: #26922 - [x] depends on: #27020 - [ ] depends on: #27021 - [x] depends on: #27023 - [ ] depends on: #27024 - [ ] depends on: #27025 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry blocked-by-other-PR 6132/26 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Geometry/Manifold/CheatSheet.md,Mathlib/Geometry/Manifold/Elaborators.lean,Mathlib/Geometry/Manifold/PartitionOfUnity.lean,Mathlib/Geometry/Manifold/Riemannian/ExistsRiemannianMetric.lean,Mathlib/Geometry/Manifold/Traces.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/LeviCivita.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Torsion.lean,Mathlib/Geometry/Manifold/VectorBundle/GramSchmidtOrtho.lean,Mathlib/Geometry/Manifold/VectorBundle/LocalFrame.lean,Mathlib/Geometry/Manifold/VectorBundle/MDifferentiable.lean,Mathlib/Geometry/Manifold/VectorBundle/Misc.lean,Mathlib/Geometry/Manifold/VectorBundle/OrthonormalFrame.lean,Mathlib/Geometry/Manifold/VectorBundle/SmoothSection.lean,Mathlib/Geometry/Manifold/VectorBundle/Tensoriality.lean,Mathlib/Geometry/Manifold/VectorField/LieBracket.lean,Mathlib/Geometry/Manifold/VectorField/Pullback.lean,MathlibTest/DifferentialGeometry/Elaborators.lean 21 n/a ['github-actions', 'grunweg', 'idontgetoutmuch', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
3-31009
3 days ago
unknown
unknown
30083 grunweg
author:grunweg
feat: local frames TODO: write a detailed description (and update the module doc-string) From the path towards geodesics and the Levi-Civita connection. Co-authored-by: Patrick Massot [patrickmassot@free.fr](mailto:patrickmassot@free.fr) --- - [ ] depends on: #27021 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry blocked-by-other-PR 2120/0 Mathlib.lean,Mathlib/Geometry/Manifold/Elaborators.lean,Mathlib/Geometry/Manifold/Traces.lean,Mathlib/Geometry/Manifold/VectorBundle/LocalFrame.lean,MathlibTest/DifferentialGeometry/Elaborators.lean,scripts/noshake.json 6 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
3-30900
3 days ago
3-61788
3 days ago
0-14
14 seconds
27268 wwylele
author:wwylele
feat: Hahn embedding theorem This proves [Hahn embedding theorem](https://en.wikipedia.org/wiki/Hahn_embedding_theorem), one among the 1000+ theorems project. --- This is migrated from #25140 to fork - [ ] depends on: #29275 - [ ] depends on: #30101 - [x] depends on: #26114 - [x] depends on: #27043 - [x] depends on: #29421 - [x] depends on: #29423 - [x] depends on: #29451 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra blocked-by-other-PR
label:t-algebra$
619/2 Mathlib.lean,Mathlib/Algebra/Order/Group/HahnEmbedding.lean,Mathlib/Algebra/Order/Module/HahnEmbedding.lean,Mathlib/Algebra/Order/Monoid/PNat.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/GroupTheory/DivisibleHull.lean,docs/1000.yaml,docs/references.bib 8 6 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
3-13870
3 days ago
19-46687
19 days ago
0-910
15 minutes
26579 robin-carlier
author:robin-carlier
feat(CategoryTheory/Limits/Pullbacks/Categorical/CatCospanTransform): equivalences of categorical cospans Building on the notion of adjunctions of categorical cospans, we define equivalences of categorical cospans as a structure extending that of an adjunction, with the extra data of a chosen inverse of the unit and counit morphisms. To mirror the design for usual equivalences of categories, we provide an alternative constructor that requires the forward and inverse direction of the equivalence, as well as unit and counits already as isomorphisms, and only a proof of the left triangle identity. Finally, we also provide a third constructor that builds such an equivalence out of the data of 3 component equivalences of categories, as well as chosen `CatCommSq` on the functors of the these equivalences. This notion of equivalence of categorical cospans is intended to encode the required data to show the full equivalence invariance of the categorical pullback defined in #26366. --- - [ ] depends on: #26578 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory merge-conflict blocked-by-other-PR 438/0 Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean 1 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
2-62352
2 days ago
2-62353
2 days ago
0-838
13 minutes
29508 zhuyizheng
author:zhuyizheng
feat(MeasureTheory): FTC and integration by parts for absolutely continuous functions Prove Fundamental Theorem of Calculus and integration by parts for absolutely continuous functions. Part of originally planned #29092. --- - [ ] depends on: #29503 - [ ] depends on: #29507 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability merge-conflict blocked-by-other-PR 1378/0 Mathlib.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/MeasureTheory/Function/AbsolutelyContinuous.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/AbsContFunc.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/DerivIntegrable.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/LebesgueDifferetiationThm.lean,Mathlib/Topology/EMetricSpace/BoundedVariation.lean 7 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
2-59081
2 days ago
2-59081
2 days ago
0-0
0 seconds
30110 ADedecker
author:ADedecker
feat: IsUniformGroup ↔ IsRightUniformGroup ∧ IsLeftUniformGroup --- - [ ] depends on: #30029 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology blocked-by-other-PR 275/36 Mathlib/Topology/Algebra/IsUniformGroup/Basic.lean,Mathlib/Topology/Algebra/IsUniformGroup/Defs.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
2-56481
2 days ago
2-61858
2 days ago
0-357
5 minutes
28796 grunweg
author:grunweg
feat: immersions are smooth The conventional textbook definition demands that an immersion be smooth. When asking for the immersion to have local slice charts (as we do), this implies smoothness automatically. --- - [x] depends on: #28701 - [ ] depends on: #28793 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry blocked-by-other-PR WIP 575/1 Mathlib.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Geometry/Manifold/ContMDiff/Atlas.lean,Mathlib/Geometry/Manifold/IsImmersionEmbedding.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,docs/overview.yaml,docs/references.bib 7 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
2-45032
2 days ago
2-45634
2 days ago
0-1
1 second
30092 grunweg
author:grunweg
feat: enable the flexible linter #28962 but with commits squashed: do not merge! --- - [x] depends on: #30091 - [x] depends on: #30106 - [ ] depends on: #28962 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 307/43 Archive/Arithcc.lean,Archive/Examples/Eisenstein.lean,Archive/Examples/IfNormalization/Result.lean,Archive/Imo/Imo1997Q3.lean,Archive/Imo/Imo2008Q4.lean,Archive/Imo/Imo2019Q4.lean,Archive/Imo/Imo2024Q5.lean,Counterexamples/MapFloor.lean,Mathlib/Algebra/Field/GeomSum.lean,Mathlib/Algebra/FreeAlgebra.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Homology/Augment.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/LinearRecurrence.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Formula.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented/Monoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/HomotopyCat.lean,Mathlib/AlgebraicTopology/SimplicialSet/NerveAdjunction.lean,Mathlib/Analysis/AbsoluteValue/Equivalence.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/LHopital.lean,Mathlib/Analysis/Complex/Arg.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Complex/JensenFormula.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/FunctionalSpaces/SobolevInequality.lean,Mathlib/Analysis/InnerProductSpace/Rayleigh.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/PosPart/Basic.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/IntegralRepresentation.lean,Mathlib/Analysis/SpecialFunctions/Gaussian/FourierTransform.lean,Mathlib/Analysis/SpecialFunctions/Log/PosLog.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Complex.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Inverse.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/Mate.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Dialectica/Monoidal.lean,Mathlib/CategoryTheory/Galois/Basic.lean,Mathlib/CategoryTheory/Limits/Constructions/Equalizers.lean,Mathlib/CategoryTheory/Limits/Shapes/BinaryProducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Equalizers.lean,Mathlib/CategoryTheory/Limits/Shapes/Grothendieck.lean,Mathlib/CategoryTheory/Limits/Shapes/Products.lean,Mathlib/CategoryTheory/Limits/VanKampen.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Braided.lean,Mathlib/CategoryTheory/Products/Basic.lean,Mathlib/Combinatorics/Additive/Corner/Roth.lean,Mathlib/Combinatorics/Additive/FreimanHom.lean,Mathlib/Combinatorics/Additive/SmallTripling.lean,Mathlib/Combinatorics/Additive/VerySmallDoubling.lean,Mathlib/Combinatorics/SetFamily/FourFunctions.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Uniform.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/Primrec.lean,Mathlib/Computability/TMConfig.lean,Mathlib/Computability/TMToPartrec.lean,Mathlib/Control/EquivFunctor/Instances.lean,Mathlib/Data/Bool/Count.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/EReal/Operations.lean,Mathlib/Data/Matrix/Basis.lean,Mathlib/Data/Nat/Digits/Defs.lean,Mathlib/Data/Nat/Digits/Lemmas.lean,Mathlib/Data/Num/Lemmas.lean,Mathlib/Data/PEquiv.lean,Mathlib/Data/Rat/Cast/CharZero.lean,Mathlib/Data/Seq/Basic.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Data/WSeq/Basic.lean,Mathlib/Geometry/Euclidean/Triangle.lean,Mathlib/Geometry/Manifold/ContMDiff/Constructions.lean,Mathlib/Geometry/Manifold/MFDeriv/Basic.lean,Mathlib/GroupTheory/Coxeter/Basic.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfStabilizer.lean,Mathlib/GroupTheory/HNNExtension.lean,Mathlib/GroupTheory/Perm/Fin.lean,Mathlib/Init.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Basic.lean,Mathlib/LinearAlgebra/Contraction.lean,Mathlib/Logic/Equiv/List.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Real.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Periodic.lean,Mathlib/MeasureTheory/Measure/Typeclasses/Probability.lean,Mathlib/NumberTheory/LucasLehmer.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Basic.lean 125 12 ['github-actions', 'grunweg', 'mathlib4-dependent-issues-bot'] nobody
2-44769
2 days ago
3-26850
3 days ago
0-0
0 seconds
28330 joelriou
author:joelriou
feat(AlgebraicTopology): the type of non degenerate simplices not in a given subcomplex --- - [ ] depends on: #28224 - [x] depends on: #27968 - [ ] depends on: #28034 - [ ] depends on: #26076 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology blocked-by-other-PR WIP 303/0 Mathlib.lean,Mathlib/AlgebraicTopology/SimplicialSet/Degenerate.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplicesSubcomplex.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/CategoryTheory/EpiMono.lean 6 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
2-36165
2 days ago
2-36196
2 days ago
0-2
2 seconds
28700 Timeroot
author:Timeroot
feat(ModelTheory): Set.Definable is transitive --- This PR continues the work from #19695. Original PR: https://github.com/leanprover-community/mathlib4/pull/19695 - [ ] depends on: #26332 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-logic blocked-by-other-PR 529/8 Mathlib/Data/Rel.lean,Mathlib/ModelTheory/Definability.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Syntax.lean,scripts/noshake.json 5 6 ['Timeroot', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'staroperator'] nobody
2-33032
2 days ago
2-33057
2 days ago
3-12935
3 days
27606 CBirkbeck
author:CBirkbeck
Eisenstein q exp identity --- - [x] depends on: #26016 - [x] depends on: #27212 - [x] depends on: #27837 - [x] depends on: #27839 - [x] depends on: #27840 - [x] depends on: #28690 - [ ] depends on: #27838 - [ ] depends on: #27841 - [ ] depends on: #27844 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict blocked-by-other-PR 824/13 Mathlib.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Complex/IntegerCompl.lean,Mathlib/Analysis/Complex/Norm.lean,Mathlib/Analysis/Complex/SummableUniformlyOn.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Cotangent.lean,Mathlib/NumberTheory/ArithmeticFunction.lean,Mathlib/NumberTheory/LSeries/RiemannZeta.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/Defs.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/QExpansion.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/Summable.lean,Mathlib/NumberTheory/TsumDivsorsAntidiagonal.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean,Mathlib/Topology/Algebra/InfiniteSum/NatInt.lean 19 6 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-66166
1 day ago
31-19160
1 month ago
0-0
0 seconds
23040 grunweg
author:grunweg
feat: define immersions and smooth embeddings in infinite dimensions Sadly, we cannot prove most nice things about them yet, as we don't have the inverse function theorem yet. TODO: prove the few things we can already say --- - [ ] depends on: #28796 - [ ] depends on: #28853 - [x] depends on: #23175 (preliminaries) - [x] depends on: #23186 - [ ] depends on: another PR, about `MSplitAt` (to be filed) - and perhaps some prerequisites about products of complemented modules etc. - [x] depends on: #23219 (preliminaries about local diffeomorphisms) - [ ] depends on: #8738 - in fact, #9273 is not a strict pre-requisite for this. It suffices to know "extended charts have invertible differentials", which [isInvertible_mfderiv_extChartAt](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Geometry/Manifold/MFDeriv/Atlas.html#isInvertible_mfderiv_extChartAt) mostly proves. (There's nothing wrong with completing that PR, for all interior points.) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict blocked-by-other-PR WIP 967/0 Mathlib.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Splits.lean,Mathlib/Geometry/Manifold/IsImmersionEmbedding.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/Manifold/MSplits.lean 5 4 ['github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
1-66006
1 day ago
1-68615
1 day ago
0-0
0 seconds
27634 agjftucker
author:agjftucker
fix(Analysis/Calculus/Implicit): consistently rename {`map`, `fun`, `function`} to `fun` There are several clear naming issues in the file Implicit.lean, such as ``` theorem prod_map_implicitFunction : ∀ᶠ p : F × G in 𝓝 (φ.prodFun φ.pt), φ.prodFun (φ.implicitFunction p.1 p.2) = p := ``` where `prod_map` and `prodFun` both refer to the same thing. In this PR I have done my best to resolve these as consistently as possible by renaming everything `map`, also everything `function`, to `fun`. This has the added benefit of making some long names a little shorter. In passing I rewrapped some comments and replaced `haveI` with `have` where it had been used like `haveI` in Lean 3. Moves: - ImplicitFunctionData -> ImplicitFunData - ImplicitFunctionData.implicitFunction -> ImplicitFunData.implicitFun - ImplicitFunctionData.prod_map_implicitFunction -> ImplicitFunData.prodFun_implicitFun - ImplicitFunctionData.left_map_implicitFunction -> ImplicitFunData.leftFun_implicitFun - ImplicitFunctionData.right_map_implicitFunction -> ImplicitFunData.rightFun_implicitFun - ImplicitFunctionData.implicitFunction_apply_image -> ImplicitFunData.implicitFun_apply_image - ImplicitFunctionData.implicitFunction_hasStrictFDerivAt -> ImplicitFunData.hasStrictFDerivAt_implicitFun - HasStrictFDerivAt.implicitFunctionDataOfComplemented -> HasStrictFDerivAt.implicitFunDataOfComplemented - HasStrictFDerivAt.implicitFunctionOfComplemented -> HasStrictFDerivAt.implicitFunOfComplemented - HasStrictFDerivAt.map_implicitFunctionOfComplemented_eq -> HasStrictFDerivAt.map_implicitFunOfComplemented_eq - HasStrictFDerivAt.eq_implicitFunctionOfComplemented -> HasStrictFDerivAt.eq_implicitFunOfComplemented - HasStrictFDerivAt.implicitFunctionOfComplemented_apply_image -> HasStrictFDerivAt.implicitFunOfComplemented_apply_image - HasStrictFDerivAt.to_implicitFunctionOfComplemented -> HasStrictFDerivAt.to_implicitFunOfComplemented - HasStrictFDerivAt.implicitFunction -> HasStrictFDerivAt.implicitFun - HasStrictFDerivAt.tendsto_implicitFunction -> HasStrictFDerivAt.tendsto_implicitFun - _root_.Filter.Tendsto.implicitFunction -> _root_.Filter.Tendsto.implicitFun - HasStrictFDerivAt.map_implicitFunction_eq -> HasStrictFDerivAt.map_implicitFun_eq - HasStrictFDerivAt.implicitFunction_apply_image -> HasStrictFDerivAt.implicitFun_apply_image - HasStrictFDerivAt.eq_implicitFunction -> HasStrictFDerivAt.eq_implicitFun - HasStrictFDerivAt.to_implicitFunction -> HasStrictFDerivAt.to_implicitFun --- - [ ] depends on: #26985 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict blocked-by-other-PR 271/123 Mathlib/Analysis/Calculus/Implicit.lean,docs/1000.yaml,docs/overview.yaml,docs/undergrad.yaml 4 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-58109
1 day ago
1-58110
1 day ago
23-28425
23 days
28853 grunweg
author:grunweg
feat: product of immersions is an immersion --- - [ ] depends on: #28793 - [x] depends on: #28840 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict blocked-by-other-PR 511/0 Mathlib.lean,Mathlib/Geometry/Manifold/IsImmersionEmbedding.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Topology/PartialHomeomorph.lean,docs/references.bib 6 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-57863
1 day ago
1-57864
1 day ago
0-1911
31 minutes
29481 llllvvuu
author:llllvvuu
feat(LinearAlgebra/Eigenspace): roots of matrix minpoly give spectrum This is derived from the corresponding result on linear maps. --- - [ ] depends on: #29478 for some simp lemmas [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
28/0 Mathlib/LinearAlgebra/Eigenspace/Minpoly.lean 1 4 ['github-actions', 'llllvvuu', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-57737
1 day ago
1-57738
1 day ago
0-0
0 seconds
30112 gaetanserre
author:gaetanserre
feat(Probability.Kernel): add representation of kernel as a map of a uniform measure Add results about isolation of kernels randomness. In particular, it shows that one can write a Markov kernel as the map by a deterministic of a uniform measure on `[0, 1]`. It corresponds to Lemma 4.22 in "[Foundations of Modern Probability](https://link.springer.com/book/10.1007/978-3-030-61871-1)" by Olav Kallenberg, 2021. --- I'm not 100% convinced by either the names of the entries or their placement. I imagine @RemyDegenne will have something to say about this. - [ ] depends on: #27516 For a rational approximation characterization of suprema in the unit interval [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability blocked-by-other-PR 172/0 Mathlib.lean,Mathlib/MeasureTheory/Constructions/UnitInterval.lean,Mathlib/Probability/Kernel/Representation.lean,Mathlib/Topology/UnitInterval.lean 4 4 ['RemyDegenne', 'gaetanserre', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
1-49714
1 day ago
2-52301
2 days ago
0-318
5 minutes
29903 joelriou
author:joelriou
chore(CategoryTheory): split Limits.Presentation The part of the code involving "set theory" (via finitely presentable objects) is moved to `CategoryTheory.Presentable.Presentation`. As `ColimitPresentation` is going to be used more widely, this will reduce dependencies to set theory for some files. - [ ] depends on: #29851 - [x] depends on: #29849 - [x] depends on: #29843 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory blocked-by-other-PR WIP 295/138 Mathlib.lean,Mathlib/CategoryTheory/Limits/Presentation.lean,Mathlib/CategoryTheory/ObjectProperty/ColimitsOfShape.lean,Mathlib/CategoryTheory/ObjectProperty/Ind.lean,Mathlib/CategoryTheory/ObjectProperty/LimitsOfShape.lean,Mathlib/CategoryTheory/Presentable/ColimitPresentation.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-44354
1 day ago
1-44375
1 day ago
0-2
2 seconds
27366 101damnations
author:101damnations
feat(RepresentationTheory/Homological/GroupCohomology/Hilbert90): add Hilbert 90 for cyclic groups Let `L/K` be a finite extension of fields. Before this PR, this file proves Noether's generalization of Hilbert's Theorem 90: that the 1st group cohomology $H^1(Aut_K(L), L^\times)$ is trivial. Hilbert's original statement was that if $L/K$ is Galois, and $Gal(L/K)$ is cyclic, generated by an element `σ`, then for every `x : L` such that $N_{L/K}(x) = 1,$ there exists `y : L` such that $x = y/σ(y).$ We prove that in this PR, using the fact that `H¹(G, A) ≅ Ker(N_A)/(ρ(g) - 1)(A)` for any finite cyclic group `G` with generator `g`, and then applying Noether's generalization. --- - [x] depends on: #27361 - [x] depends on: #27362 - [x] depends on: #27363 - [ ] depends on: #27364 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
417/8 Mathlib.lean,Mathlib/CategoryTheory/Action/Limits.lean,Mathlib/RepresentationTheory/Homological/FiniteCyclic.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/FiniteCyclic.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/Hilbert90.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/LowDegree.lean,Mathlib/RepresentationTheory/Invariants.lean,Mathlib/RepresentationTheory/Rep.lean 8 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-41067
1 day ago
41-40966
1 month ago
0-351
5 minutes
26831 AntoineChambert-Loir
author:AntoineChambert-Loir
feat(GroupTheory/SpecificGroups/Alternating/MaximalSubgroups): maximal subgroups of the alternating group This proves the first case (intransitive) of the O'Nan-Scott classification of maximal subgroups of the alternating group. --- - [ ] depends on: #26457 - [ ] depends on: #26282 - [x] depends on: #26281 - [x] depends on: #26280 - [x] depends on: #26279 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory large-import blocked-by-other-PR 2061/146 Mathlib.lean,Mathlib/Data/Set/Card.lean,Mathlib/GroupTheory/GroupAction/FixingSubgroup.lean,Mathlib/GroupTheory/GroupAction/Jordan.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/GroupTheory/GroupAction/Primitive.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfFixingSubgroup.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfStabilizer.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean,Mathlib/GroupTheory/Perm/MaximalSubgroups.lean,Mathlib/GroupTheory/SpecificGroups/Alternating.lean,Mathlib/GroupTheory/SpecificGroups/Alternating/MaximalSubgroups.lean,Mathlib/SetTheory/Cardinal/Embedding.lean,docs/references.bib 16 n/a ['AntoineChambert-Loir', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-40502
1 day ago
unknown
unknown
26457 AntoineChambert-Loir
author:AntoineChambert-Loir
feat(Mathlib/GroupTheory/Perm/MaximalSubgroups): maximal subgroups of the permutation group * `Equiv.Perm.isCoatom_stabilizer`: when `s : Set α` is not empty, nor its complementary subset, and if the cardinality of `s` is not half of that of `α`, then `MulAction.stabilizer (Equiv.Perm α) s` is a maximal subgroup of the symmetric group `Equiv.Perm α`. This is the *intransitive case* of the O'Nan-Scott classification. ## TODO * Appplication to primitivity of the action of `Equiv.Perm α` on finite combinations of `α`. * Finish the classification --- - [ ] depends on: #26282 - [x] depends on: #26281 - [x] depends on: #26280 - [x] depends on: #26279 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory large-import blocked-by-other-PR 1454/138 Mathlib.lean,Mathlib/Data/Set/Card.lean,Mathlib/GroupTheory/GroupAction/FixingSubgroup.lean,Mathlib/GroupTheory/GroupAction/Jordan.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/GroupTheory/GroupAction/Primitive.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfFixingSubgroup.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfStabilizer.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean,Mathlib/GroupTheory/Perm/MaximalSubgroups.lean,Mathlib/SetTheory/Cardinal/Embedding.lean,docs/references.bib 14 n/a ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-40489
1 day ago
unknown
unknown
29881 joelriou
author:joelriou
refactor(CategoryTheory/ObjectProperty): IsClosedUnderLimitsOfShape WIP. Rename `ClosedUnderLimitsOfShape` as `ObjectProperty.IsClosedUnderLimitsOfShape`, and make it a typeclass. --- - [ ] depends on: #29903 - [ ] depends on: #29851 - [x] depends on: #29843 - [x] depends on: #29849 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory blocked-by-other-PR WIP 552/304 Mathlib.lean,Mathlib/CategoryTheory/Limits/FullSubcategory.lean,Mathlib/CategoryTheory/Limits/Indization/Category.lean,Mathlib/CategoryTheory/Limits/Indization/Equalizers.lean,Mathlib/CategoryTheory/Limits/MorphismProperty.lean,Mathlib/CategoryTheory/Limits/Presentation.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Basic.lean,Mathlib/CategoryTheory/ObjectProperty/ColimitsOfShape.lean,Mathlib/CategoryTheory/ObjectProperty/Ind.lean,Mathlib/CategoryTheory/ObjectProperty/LimitsOfShape.lean,Mathlib/CategoryTheory/Presentable/ColimitPresentation.lean,Mathlib/CategoryTheory/Subobject/MonoOver.lean 12 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-29108
1 day ago
1-31054
1 day ago
0-1
1 second
28244 robin-carlier
author:robin-carlier
feat(CategoryTheory/Bicategory/NaturalTransformation): Icons We define icons (short for Identity Component Oplax Natural transformations) between lax functors in bicategories. Such transformations bundle an oplax natural transformation, along with the assertion that the source and target functor agree on objects, and the fact that the app-component of the underlying natural transformation is the `eqToHom` morphism along that equality. We define vertical composition of such natural transformations. Strict associativity and strict unitality of the composition of icons will be the content of a follow-up PR. In future work, icons will constitute the 2-cells of a strict bicategory structure on bicategories, with 1-cells (strictly unitary) pseudofunctors. This bicategory structure will define a category structure on strictly unitary pseudofunctors from `LocallyDiscrete (Fin n)` to a bicategory `C` (i.e "pseudo-composable arrows" in `C`), which will be part of the definition of the 2-nerve of `C`, which is a simplicial category that encodes higher compositions within a bicategory `C`. --- - [ ] depends on: #25825 - [ ] depends on: #28243 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory awaiting-CI merge-conflict blocked-by-other-PR WIP 816/33 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/EqToHom.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Icon.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Lax.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Oplax.lean,Mathlib/CategoryTheory/Bicategory/Strict.lean,Mathlib/CategoryTheory/EqToHom.lean,scripts/noshake.json 8 4 ['github-actions', 'joelriou', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-27225
1 day ago
1-27226
1 day ago
0-1160
19 minutes
28245 robin-carlier
author:robin-carlier
feat(CategoryTheory/Bicategory/NaturalTransformation/Icon): strict associativity and unitality of icon composition We show that the vertical composition of icons defined in #28244 satisfies strict associativity and strict unitality. This morally shows that icons are fit as the 2-cells of a bicategory structure on bicategories and lax functors, though we do not record an instance of this sort. --- - [ ] depends on: #28244 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory awaiting-CI merge-conflict blocked-by-other-PR WIP 975/33 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/EqToHom.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Icon.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Lax.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Oplax.lean,Mathlib/CategoryTheory/Bicategory/Strict.lean,Mathlib/CategoryTheory/EqToHom.lean,scripts/noshake.json 8 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-27224
1 day ago
1-27224
1 day ago
0-537
8 minutes
28893 joelriou
author:joelriou
refactor(AlgebraicTopology): redefine the topological simplex using the convexity API Before this PR, the n-dimensional topological simplex (in the `AlgebraicTopology` hierarchy) was defined as a subtype of `Fin (n + 1) → ℝ≥0`, which did not interact well with the convexity API which assumes the ambient type is a vector space. In this PR, we redefine the topological simplex functor (as a cosimplicial object in `TopCat`) using the already existing `stdSimplex` from `Analysis.Convex`. --- - [ ] depends on: #28891 - [x] depends on: #28869 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology t-convex-geometry large-import blocked-by-other-PR 283/109 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SingularSet.lean,Mathlib/AlgebraicTopology/TopologicalSimplex.lean,Mathlib/Analysis/Convex/StdSimplex.lean,Mathlib/LinearAlgebra/Finsupp/Pi.lean,Mathlib/Topology/Algebra/Monoid/FunOnFinite.lean 7 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-25650
1 day ago
34-39679
1 month ago*
0-2609
43 minutes*
30129 vlad902
author:vlad902
feat(SimpleGraph): define and prove basic theory of vertex covers Define a predicate `IsVertexCover G C` to state that `C` is a vertex cover of `G`. Furthermore, `G.minVertexCover` is the cardinality of the minimum vertex cover of G. Then prove the basic theory of how these definitions relate to the empty and complete graphs and their relationship with graph homs/isos. - [ ] depends on: #29833 - [ ] depends on: #30136 - [ ] depends on: #30137 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics blocked-by-other-PR 198/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/VertexCover.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
1-24735
1 day ago
1-41243
1 day ago
0-1068
17 minutes
30053 vlad902
author:vlad902
feat(SimpleGraph): only the complete graph has chromatic number equal to its cardinality Prove that only the (finite) complete graph has chromatic number equal to its cardinality, thereby finishing an iff fully characterizing graphs with chromatic number equal to their cardinality. - [ ] depends on: #30136 - [ ] depends on: #30137 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics blocked-by-other-PR 49/0 Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Coloring.lean 2 6 ['eric-wieser', 'github-actions', 'mathlib4-dependent-issues-bot', 'vlad902'] nobody
1-24724
1 day ago
1-24726
1 day ago
4-13647
4 days
29579 vlad902
author:vlad902
feat(SimpleGraph): characterize graphs with chromatic number 1 or 2 - [ ] depends on: #29578 - [ ] depends on: #30136 t-combinatorics blocked-by-other-PR 42/7 Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Coloring.lean,Mathlib/Combinatorics/SimpleGraph/ConcreteColorings.lean 3 7 ['github-actions', 'jt496', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vlad902'] nobody
1-24675
1 day ago
1-24676
1 day ago
15-56462
15 days
26212 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra): the Rees theorem for depth In this PR we proved the Rees theorem for depth. Co-authored-by: Hu Yongle --- - [ ] depends on: #27416 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra blocked-by-other-PR
label:t-algebra$
409/22 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean 9 n/a ['Thmoas-Guan', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
1-5553
1 day ago
unknown
unknown
26213 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra): Ext iso quotient regular sequence In this PR defined the `addequiv` between `Ext M N k` and `N =>[R] M/ rs * M` where `rs` is a regular sequence of length `k` Co-authored-by: Hu Yongle Co-authored-by: Wang Jingting --- - [ ] depends on: #26212 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra blocked-by-other-PR
label:t-algebra$
470/22 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean 9 n/a ['Thmoas-Guan', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
1-5371
1 day ago
unknown
unknown
26214 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra): definition of depth In this PR, we defined the depth of two modules as the minimal order of nonvanishing `Ext` and the `I-depth` for ideal `I` and some basic properties. Including the equivalence of the two in the condition of rees theorem. --- - [ ] depends on: #26212 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra blocked-by-other-PR
label:t-algebra$
829/22 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean 9 n/a ['Thmoas-Guan', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
1-3970
1 day ago
unknown
unknown
26215 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra): Auslander–Buchsbaum theorem This PR mainly proved the Auslander-Buchsbaum theorem stating for a noetherian local ring `R` and a finitely generated `R` module `M` , `proj.dim(M) + depth(M) = depth(R)`. Co-authored-by: Yongle Hu --- - [ ] depends on: #26214 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra blocked-by-other-PR
label:t-algebra$
1314/22 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Regular/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean 10 n/a ['Thmoas-Guan', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
1-3933
1 day ago
unknown
unknown
26216 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra): depth of QuotSMulTop In this PR, we proved for a local ring `R` and a finitely generated `R` module `M N`, `IsSMulRegular M x` and `x ∈ Module.annihilator R N`, then `depth(N, M/xM) + 1 = depth(N, M)`, and its corollary for quotient regular seqence. --- - [ ] depends on: #26214 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra blocked-by-other-PR
label:t-algebra$
1132/22 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean 9 n/a ['Thmoas-Guan', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
1-3922
1 day ago
unknown
unknown
26217 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra): Ischebeck theorem This PR mainly proved the Ischbecke theorem, stating that `depth(N,M)` is greater or equal to `depth(M) - dim(N)` for finitely generated module `N, M` over local ring. --- - [ ] depends on: #26214 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra blocked-by-other-PR
label:t-algebra$
1150/22 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean 10 n/a ['Thmoas-Guan', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
1-3878
1 day ago
unknown
unknown
26218 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra): definition of cohen macaulay In this PR, we added the definition of CM module, CM local ring (extending local ring), and CM ring. We also proved Theorem 30, Chater 6, _Commutative Algebra_, Matsumura. --- - [ ] depends on: #26219 - [ ] depends on: #26217 - [ ] depends on: #26216 - [ ] depends on: #28582 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra blocked-by-other-PR
label:t-algebra$
2365/57 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Localization.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/KrullDimension/Module.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/MaximalIdeal/Basic.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/Support.lean 20 n/a ['Thmoas-Guan', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-3599
1 day ago
unknown
unknown
26245 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra): cohen macaulay local ring is catenary We prove Cohen Macaulay local ring is catenary. Following Theorem 31, Chater 6, _Commutative Algebra_, Matsumura --- - [ ] depends on: #26218 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra blocked-by-other-PR WIP
label:t-algebra$
2757/57 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Catenary.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Localization.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/KrullDimension/Module.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/MaximalIdeal/Basic.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/Support.lean 21 n/a ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-3191
1 day ago
unknown
unknown
26957 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra): unmixed thm of Cohen-Macaulay ring In this PR we proved for a (comm)ring `R`, `R` is Cohen-Macaulay ring iff the unmixed theorem holds (for every ideal `I` of height `r` generated by `r` elements, all associated primes of `R/I` have height `r` ) --- - [ ] depends on: #26245 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra blocked-by-other-PR
label:t-algebra$
2933/57 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Catenary.lean,Mathlib/RingTheory/CohenMacaulay/Unmixed.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Localization.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/KrullDimension/Module.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/MaximalIdeal/Basic.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/Support.lean 22 n/a ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-3128
1 day ago
unknown
unknown
29937 Thmoas-Guan
author:Thmoas-Guan
feat(RingTheory): `ringKrullDim` of quotient via supportDim In this PR, we establish some lemma about `ringKrullDim` of quotient via lemmas of `supportDim`. Co-authored-by: Yongle Hu @mbkybky --- - [ ] depends on: #26219 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR 297/15 Mathlib.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Localization.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/KrullDimension/Module.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/MaximalIdeal/Basic.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Support.lean 9 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
1-2882
1 day ago
9-48162
9 days ago
0-2070
34 minutes
28683 Thmoas-Guan
author:Thmoas-Guan
feat(RingTheory) : regular local ring is domain In this PR, we proved for a regular local ring `R`, 1 : for a finite set `S` in the maximal Ideal of `R`, it can be extended to a regular system of parameters iff they are linear independent in the cotangent space iff `R/span S` is regular local ring of dimesion `dim R - |S|` 2 : is domain 3 : regular system of parameter form regular sequence. --- - [ ] depends on: #28682 - [ ] depends on: #28582 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR WIP 472/0 Mathlib.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean 4 3 ['Thmoas-Guan', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
1-2748
1 day ago
44-66296
1 month ago
0-111
1 minute
28684 Thmoas-Guan
author:Thmoas-Guan
feat(RingTheory) : definition of regular ring In this PR, we define regular ring as every localization is regular local ring, and proved polynomial over regular ring is regular. --- - [ ] depends on: #28682 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR WIP 158/0 Mathlib.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Basic.lean 3 3 ['Thmoas-Guan', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
1-2525
1 day ago
44-66297
1 month ago
0-153
2 minutes
29701 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra/RingTheory): polynomial over regular ring In this PR, we proved that polynomial over regular ring is regular. --- - [ ] depends on: #28684 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR 326/0 Mathlib.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Polynomial.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
1-2440
1 day ago
17-66275
17 days ago
0-10179
2 hours
29670 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra): projective dimension equal supremum of localized module In this PR, we proved that for a finitely generated module `M` over a noetherian ring `R`, `projdim_R(M)` is equal to the supremum `projdim (M_p)` (viewed as `R_p` module) as `p` run over all prime/maximal ideals. We also proved that the global dimension of `R` is equal to the supremeum of global dimension of `R_p` as p run over all prime/maximal ideals. --- - [ ] depends on: #29558 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR 564/0 Mathlib.lean,Mathlib/RingTheory/GlobalDimension.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-1579
1 day ago
9-52087
9 days ago
0-56
56 seconds
29533 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra): maximal Cohen Macaulay module In this PR, we defined the concept of maximal Cohen Macaulay module, and proved that finitely generated maximal Cohen Macaulay module over regular local ring is free. --- - [ ] depends on: #28683 - [ ] depends on: #26218 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 3001/57 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Localization.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/KrullDimension/Module.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/MaximalIdeal/Basic.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/Support.lean 23 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
1-912
1 day ago
23-4989
23 days ago*
0-88
1 minute*
29557 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra): finite projective dimension of regular In this PR, we proved every finitely generated module over regular local ring has finite projective dimension. With this and Auslander Buchsbaum theorem, we can obtain the global dimension of regular local ring is equal to its krull dimension. --- - [ ] depends on: #29533 - [ ] depends on: #26215 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 3572/57 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Localization.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/KrullDimension/Module.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/MaximalIdeal/Basic.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/GlobalDimension.lean,Mathlib/RingTheory/Support.lean 25 n/a ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
1-871
1 day ago
unknown
unknown
29534 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra): global dimension of regular local ring In this PR, we proved the global dimension of regular local ring is equal to its krull dimension via Auslander Buchsbaum theorem. --- - [ ] depends on: #29557 - [ ] depends on: #26215 - [ ] depends on: #29558 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 3832/57 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/GlobalDimension.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Localization.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/KrullDimension/Module.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/MaximalIdeal/Basic.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/GlobalDimension.lean,Mathlib/RingTheory/Support.lean 26 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-678
1 day ago
unknown
unknown
29703 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra/RingTheory): Hilbert's Syzygy theorem (projective version) In this PR, we proved for field `k`, `MvPolynomial (Fin n) k` has global dimension `n`. --- - [ ] depends on: #29701 - [ ] depends on: #29699 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 4532/57 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/GlobalDimension.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Localization.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/KrullDimension/Module.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/MaximalIdeal/Basic.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/GlobalDimension.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/GlobalDimension.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Polynomial.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Syzygy.lean,Mathlib/RingTheory/Support.lean 30 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-362
1 day ago
unknown
unknown
29699 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra/RingTheory) : Global dimension of regular ring In this PR, we proved that the global (homological dimension) of regular ring is equal to its krull dimension. --- - [ ] depends on: #28684 - [ ] depends on: #29670 - [ ] depends on: #29534 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 4285/57 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/GlobalDimension.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Localization.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/KrullDimension/Module.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/MaximalIdeal/Basic.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/GlobalDimension.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/GlobalDimension.lean,Mathlib/RingTheory/Support.lean 28 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-85900
23 hours ago
unknown
unknown
29796 Thmoas-Guan
author:Thmoas-Guan
feat(RingTheory) : regular of finite global dimension In this PR, we proved the other half of Auslander-Buchsbaum-Serre criterion, which states that a local ring is regular if it has finite global dimension, with results in #29557, we can obtain the full theorem. More APIs would be developed based on the two. --- - [ ] depends on: #26215 - [ ] depends on: #26217 - [ ] depends on: #29558 - [ ] depends on: #28683 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 3009/22 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/RingTheory/GlobalDimension.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Regular/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/RegularLocalRing/AuslanderBuchsbaumSerre.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean 16 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-85724
23 hours ago
unknown
unknown
29802 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra/RingTheory) : Auslander–Buchsbaum–Serre criterion and its corollaries In this PR, we proved that: 1: The full version of Auslander–Buchsbaum–Serre criterion 2: Localization of regular local ring is regular 3: Global dimension finite implies regular (doesn't need local) 4: Regular ring only need to be verified at maximal ideals. --- - [ ] depends on: #29534 - [ ] depends on: #29699 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 5085/57 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/GlobalDimension.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Localization.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/KrullDimension/Module.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/MaximalIdeal/Basic.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/RegularLocalRing/AuslanderBuchsbaumSerre.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/GlobalDimension.lean,Mathlib/RingTheory/RegularLocalRing/Localization.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/GlobalDimension.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Localization.lean,Mathlib/RingTheory/Support.lean 31 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-85702
23 hours ago
unknown
unknown
28718 imbrem
author:imbrem
Added 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 new-contributor t-category-theory awaiting-author blocked-by-other-PR 290/0 Mathlib.lean,Mathlib/CategoryTheory/ChosenFiniteCoproducts.lean 2 8 ['YaelDillies', 'github-actions', 'imbrem', 'mathlib4-dependent-issues-bot', 'robin-carlier'] nobody
0-67825
18 hours ago
0-67826
18 hours ago
0-24930
6 hours
28468 alreadydone
author:alreadydone
feat(Algebra): ring API for `AddLocalization` Extract `Submonoid.IsLocalizationMap` from `LocalizationMap` and use it in `IsLocalization`. Develop basic API for AddLocalization at a two-sided ideal; in the case of the top AddSubmonoid, show the localization has a Ring structure (Grothendieck ring). Show that a commuative semiring with cancellative addition satisfies the strong rank condition. --- - [x] depends on: #27842 - [x] depends on: #27862 - [ ] depends on: #29596 - [x] depends on: #29597 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author blocked-by-other-PR
label:t-algebra$
1000/120 Mathlib.lean,Mathlib/Algebra/Module/End.lean,Mathlib/Algebra/Module/LocalizedModule/IsLocalization.lean,Mathlib/Algebra/Order/Nonneg/Basic.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Ring/Invertible.lean,Mathlib/GroupTheory/MonoidLocalization/Archimedean.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/Lemmas.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/RingTheory/IsTensorProduct.lean,Mathlib/RingTheory/Localization/Additive.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean,Mathlib/RingTheory/Localization/StrongRankCondition.lean,Mathlib/RingTheory/Smooth/StandardSmooth.lean 17 6 ['alreadydone', 'chrisflav', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] chrisflav
assignee:chrisflav
0-49050
13 hours ago
20-83963
20 days ago
17-3113
17 days
23177 faenuccio
author:faenuccio
feat: more lemmas about ordered groups with zero We add some order properties (mainly some `lt`) for types of the form `WithZero α`. Co-authored-by: María Inés de Frutos Fernández --- - [x] depends on: #26665 - [x] depends on: #26724 - [x] depends on: #26761 - [x] depends on: #26762 - [x] depends on: #26763 - [ ] depends on: #26777 large-import t-order awaiting-CI blocked-by-other-PR WIP 13/1 Mathlib/Algebra/Order/GroupWithZero/Unbundled/Basic.lean 1 46 ['Vierkantor', 'YaelDillies', 'faenuccio', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-47907
13 hours ago
19-42583
19 days ago
5-22106
5 days
29854 joelriou
author:joelriou
feat(CategoryTheory/ObjectProperty): closure of a property under certain limits In this PR, given a property `P` of objects in a category `C` and family of categories `J : α → Type _`, we introduce the closure `P.limitsClosure J` of `P` under limits of shapes `J a` for all `a : α`, and under certain smallness circumstances, we show that its essentially small. - [ ] depends on: #29851 - [ ] depends on: #29881 - [ ] depends on: #29903 - [x] depends on: #29849 - [x] depends on: #29843 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory blocked-by-other-PR WIP 945/304 Mathlib.lean,Mathlib/CategoryTheory/Limits/FullSubcategory.lean,Mathlib/CategoryTheory/Limits/Indization/Category.lean,Mathlib/CategoryTheory/Limits/Indization/Equalizers.lean,Mathlib/CategoryTheory/Limits/MorphismProperty.lean,Mathlib/CategoryTheory/Limits/Presentation.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Basic.lean,Mathlib/CategoryTheory/ObjectProperty/ClosedUnderIsomorphisms.lean,Mathlib/CategoryTheory/ObjectProperty/ColimitsOfShape.lean,Mathlib/CategoryTheory/ObjectProperty/CompleteLattice.lean,Mathlib/CategoryTheory/ObjectProperty/Ind.lean,Mathlib/CategoryTheory/ObjectProperty/LimitsClosure.lean,Mathlib/CategoryTheory/ObjectProperty/LimitsOfShape.lean,Mathlib/CategoryTheory/ObjectProperty/Small.lean,Mathlib/CategoryTheory/Presentable/ColimitPresentation.lean,Mathlib/CategoryTheory/Subobject/MonoOver.lean 16 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-47656
13 hours ago
1-26409
1 day ago
0-1
1 second
30160 joelriou
author:joelriou
feat(CategoryTheory/ObjectProperty): closure of a property under certain colimits In this PR, we dualize a few notions about `ObjectProperty` and we use this to dualize the main result about limits in #29854 for colimits: given a property `P` of objects in a category `C` and family of categories `J : α → Type _`, we introduce the closure `P.colimitsClosure J` of `P` under colimits of shapes `J a` for all `a : α`, and under certain smallness circumstances, we show that its essentially small. --- - [ ] depends on: #29851 - [ ] depends on: #29881 - [ ] depends on: #29903 - [ ] depends on: #29854 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory blocked-by-other-PR WIP 1370/305 Mathlib.lean,Mathlib/CategoryTheory/Limits/FullSubcategory.lean,Mathlib/CategoryTheory/Limits/Indization/Category.lean,Mathlib/CategoryTheory/Limits/Indization/Equalizers.lean,Mathlib/CategoryTheory/Limits/MorphismProperty.lean,Mathlib/CategoryTheory/Limits/Presentation.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Basic.lean,Mathlib/CategoryTheory/ObjectProperty/ClosedUnderIsomorphisms.lean,Mathlib/CategoryTheory/ObjectProperty/ColimitsClosure.lean,Mathlib/CategoryTheory/ObjectProperty/ColimitsOfShape.lean,Mathlib/CategoryTheory/ObjectProperty/CompleteLattice.lean,Mathlib/CategoryTheory/ObjectProperty/Ind.lean,Mathlib/CategoryTheory/ObjectProperty/LimitsClosure.lean,Mathlib/CategoryTheory/ObjectProperty/LimitsOfShape.lean,Mathlib/CategoryTheory/ObjectProperty/Opposite.lean,Mathlib/CategoryTheory/ObjectProperty/Small.lean,Mathlib/CategoryTheory/Presentable/ColimitPresentation.lean,Mathlib/CategoryTheory/Subobject/MonoOver.lean 18 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
0-47428
13 hours ago
0-55654
15 hours ago
0-1
1 second
26291 RemyDegenne
author:RemyDegenne
feat(Probability): Fernique's theorem and Cameron-Martin theorem - invariance by rotation of Gaussian measures - Fernique's theorem - Corollary: the identity is in Lp for all finite p - Definition of the Cameron-Martin space of a Gaussian measure - The Cameron-Martin theorem: shifting a Gaussian measure by an element of the Cameron-Martin space gives an equivalent measure, and shifting by an element which is not in the Cameron-Martin space gives a mutually singular measure. --- - [x] depends on: #24975 - [x] depends on: #24969 - [x] depends on: #24930 - [x] depends on: #24925 - [x] depends on: #24900 - [x] depends on: #25532 - [x] depends on: #27022 - [x] depends on: #27027 - [x] depends on: #27029 - [x] depends on: #27123 - [x] depends on: #27610 - [x] depends on: #28342 - [x] depends on: #28343 - [ ] depends on: #30167 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24430.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24430* t-measure-probability blocked-by-other-PR WIP 2059/5 Mathlib.lean,Mathlib/MeasureTheory/Measure/Portmanteau.lean,Mathlib/Probability/Distributions/Gaussian/Basic.lean,Mathlib/Probability/Distributions/Gaussian/CameronMartin.lean,Mathlib/Probability/Distributions/Gaussian/CameronMartinThm.lean,Mathlib/Probability/Distributions/Gaussian/Fernique.lean,Mathlib/Probability/Distributions/Gaussian/Real.lean,Mathlib/Probability/Moments/CovarianceBilin.lean,Mathlib/Probability/Moments/Variance.lean,Mathlib/Topology/MetricSpace/ThickenedIndicator.lean,docs/1000.yaml 11 6 ['github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-46094
12 hours ago
0-46097
12 hours ago
0-2
2 seconds
30168 joelriou
author:joelriou
feat(CategoryTheory): closure under bounded colimits In this PR, given `P : ObjectProperty C` and `κ : Cardinal.{w}`, we introduce the closure `P.colimitsCardinalClosure κ` of `P` under colimits of shapes given by categories `J` such that `HasCardinalLT (Arrow J) κ` holds. If `C` is locally `w`-small and `P` is essentially `w`-small, we show that this closure `P.colimitsCardinalClosure κ` is also essentially `w`-small. (In particular, if `κ = ℵ₀`, this is the closure of `P` under finite colimits.) --- - [ ] depends on: #29851 - [ ] depends on: #29881 - [ ] depends on: #29903 - [ ] depends on: #29854 - [ ] depends on: #30160 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-category-theory blocked-by-other-PR WIP 1495/307 Mathlib.lean,Mathlib/CategoryTheory/Limits/FullSubcategory.lean,Mathlib/CategoryTheory/Limits/Indization/Category.lean,Mathlib/CategoryTheory/Limits/Indization/Equalizers.lean,Mathlib/CategoryTheory/Limits/MorphismProperty.lean,Mathlib/CategoryTheory/Limits/Presentation.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Basic.lean,Mathlib/CategoryTheory/ObjectProperty/ClosedUnderIsomorphisms.lean,Mathlib/CategoryTheory/ObjectProperty/ColimitsCardinalClosure.lean,Mathlib/CategoryTheory/ObjectProperty/ColimitsClosure.lean,Mathlib/CategoryTheory/ObjectProperty/ColimitsOfShape.lean,Mathlib/CategoryTheory/ObjectProperty/CompleteLattice.lean,Mathlib/CategoryTheory/ObjectProperty/Ind.lean,Mathlib/CategoryTheory/ObjectProperty/LimitsClosure.lean,Mathlib/CategoryTheory/ObjectProperty/LimitsOfShape.lean,Mathlib/CategoryTheory/ObjectProperty/Opposite.lean,Mathlib/CategoryTheory/ObjectProperty/Small.lean,Mathlib/CategoryTheory/Presentable/ColimitPresentation.lean,Mathlib/CategoryTheory/SmallRepresentatives.lean,Mathlib/CategoryTheory/Subobject/MonoOver.lean 20 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
0-39394
10 hours ago
0-40267
11 hours ago
0-1
1 second
29378 mans0954
author:mans0954
feature(Analysis/LocallyConvex/AbsConvex): Balanced and AbsConvex sets under linear maps Provide `Balanced` and `AbsConvex` versions of `Convex.linear_image`, `Convex.linear_preimage` and the `is_linear` equivalents. --- - [ ] depends on: #29342 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis blocked-by-other-PR 133/68 Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/LocallyConvex/AbsConvex.lean,Mathlib/Analysis/LocallyConvex/AbsConvexOpen.lean,Mathlib/Analysis/LocallyConvex/BalancedCoreHull.lean,Mathlib/Analysis/LocallyConvex/Basic.lean,Mathlib/Analysis/Normed/Module/Dual.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-38503
10 hours ago
1-26118
1 day ago
0-424
7 minutes
29387 mans0954
author:mans0954
feature(Analysis/LocallyConvex/WeakSpace): toWeakSpace_closedAbsConvexHull_eq The closed absolutely convex hull taken in the weak topology coincides with the closed absolutely convex hull taken in the original topology. --- - [ ] depends on: #29378 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis blocked-by-other-PR 133/68 Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/LocallyConvex/AbsConvex.lean,Mathlib/Analysis/LocallyConvex/AbsConvexOpen.lean,Mathlib/Analysis/LocallyConvex/BalancedCoreHull.lean,Mathlib/Analysis/LocallyConvex/Basic.lean,Mathlib/Analysis/Normed/Module/Dual.lean 6 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-35792
9 hours ago
0-38389
10 hours ago
0-2474
41 minutes
29819 mcdoll
author:mcdoll
feat(Analysis/Distribution): Tempered distributions --- This is mainly a tracking PR: Most features will be PR'd separately. - [x] depends on: #29818 - [x] depends on: #29821 - [x] depends on: #29846 - [ ] depends on: #29860 - [ ] depends on: #30174 - [ ] depends on: #30175 - [ ] depends on: #30176 - [ ] depends on: #30180 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict blocked-by-other-PR WIP 770/21 Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Distribution/FourierMultiplier.lean,Mathlib/Analysis/Distribution/FourierSchwartz.lean,Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/Distribution/TemperedDistribution.lean 5 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-31859
8 hours ago
3-20962
3 days ago
0-2
2 seconds
30177 joelriou
author:joelriou
feat(CategoryTheory): prestacks Let `C` be a category and `F : Pseudofunctor (LocallyDiscrete Cᵒᵖ) Cat`. Given `S : C`, and objects `M` and `N` in `F.obj (.mk (op S))`, we define a presheaf of types `F.presheafHom M N` on the category `Over S`: its sections on a object `T : Over S` corresponding to a morphism `p : X ⟶ S` are the type of morphisms `p^* M ⟶ p^* N`. We shall say that `F` satisfies the descent of morphisms for a Grothendieck topology `J` (i.e. `F` is a prestack) if these presheaves are all sheaves (typeclass `F.HasDescentOfMorphisms J`). Co-authored-by: Christian Merten [christian@merten.dev](mailto:christian@merten.dev) --- - [x] depends on: #24382 - [ ] depends on: #25971 This PR continues the work from #24411. Original PR: https://github.com/leanprover-community/mathlib4/pull/24411 t-category-theory blocked-by-other-PR WIP 323/20 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Functor/Cat.lean,Mathlib/CategoryTheory/Bicategory/Grothendieck.lean,Mathlib/CategoryTheory/Bicategory/Strict/Pseudofunctor.lean,Mathlib/CategoryTheory/Sites/Descent/IsPrestack.lean,Mathlib/Tactic/CategoryTheory/ToApp.lean,MathlibTest/CategoryTheory/ToApp.lean 7 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
0-31231
8 hours ago
0-31892
8 hours ago
0-208
3 minutes
24434 joelriou
author:joelriou
feat(CategoryTheory): effectiveness of descent Co-authored-by: Christian Merten [christian@merten.dev](mailto:christian@merten.dev) --- - [x] depends on: #24411 - [x] depends on: #24382 - [ ] depends on: #25971 - [x] depends on: #13539 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict blocked-by-other-PR WIP 4052/66 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/Adj.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/BaseChange.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/Mate.lean,Mathlib/CategoryTheory/Bicategory/Functor/Cat.lean,Mathlib/CategoryTheory/Bicategory/Functor/LocallyDiscrete.lean,Mathlib/CategoryTheory/Bicategory/Functor/Strict.lean,Mathlib/CategoryTheory/Bicategory/Opposite.lean,Mathlib/CategoryTheory/CommSq.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/CommSq.lean,Mathlib/CategoryTheory/Sites/Descent/DescentData.lean,Mathlib/CategoryTheory/Sites/Descent/DescentDataAsCoalgebra.lean,Mathlib/CategoryTheory/Sites/Descent/DescentDataDoublePrime.lean,Mathlib/CategoryTheory/Sites/Descent/DescentDataPrime.lean,Mathlib/CategoryTheory/Sites/Descent/IsPrestack.lean,Mathlib/CategoryTheory/Sites/Descent/IsStack.lean,Mathlib/CategoryTheory/Sites/Descent/ModuleCat.lean,Mathlib/CategoryTheory/Sites/Descent/PullbackStruct.lean 19 n/a ['callesonne', 'chrisflav', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'yuma-mizuno'] nobody
0-31084
8 hours ago
unknown
unknown
29926 jcreinhold
author:jcreinhold
feat(CategoryTheory/MarkovCategory): add basic finite stochastic matrices definitions to Markov category This PR introduces FinStoch, the category of finite stochastic matrices, as a concrete example of a Markov category. This PR builds on #29925, #29939, and #29919 and was split up from #29657. ## Main additions ### 1. Core definitions (`FinStoch/Basic.lean`) - `StochasticMatrix m n`: Matrices where rows sum to 1, representing conditional probabilities P(j|i) - `FinStoch`: The category with finite types as objects and stochastic matrices as morphisms - `DetMorphism`: Deterministic matrices (exactly one 1 per row) with their underlying functions - Composition: Matrix multiplication preserves row-stochasticity via the Chapman-Kolmogorov equation Key design choices: - Row-stochastic convention: entry (i,j) is P(output=j | input=i) - Deterministic morphisms tracked separately for structural isomorphisms ### 2. Monoidal structure (`FinStoch/Monoidal.lean`) Implements tensor products modeling independent parallel processes: - Tensor on objects: Cartesian product of finite types - Tensor on morphisms: Kronecker product P((j₁,j₂)|(i₁,i₂)) = P(j₁|i₁) × P(j₂|i₂) - Structural morphisms: Associator, unitors use deterministic permutations - Coherence**: Pentagon and triangle identities verified computationally ## Mathematical significance FinStoch provides the canonical example of a Markov category: - Morphisms: Stochastic matrices/Markov chains - Composition: Chapman-Kolmogorov equation for multi-step transitions - Tensor: Independent parallel processes This models finite probability spaces categorically, where: - Objects represent sample spaces - Morphisms represent probabilistic transitions - Tensor products model independence ## References Fritz (2020) - [ ] depends on: #29925 new-contributor t-category-theory merge-conflict blocked-by-other-PR 1437/0 Mathlib.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Basic.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Deterministic.lean,Mathlib/CategoryTheory/MarkovCategory/Basic.lean,Mathlib/CategoryTheory/MarkovCategory/Cartesian.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Basic.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Monoidal.lean,MathlibTest/CategoryTheory/MarkovCategory.lean,docs/references.bib 9 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-28439
7 hours ago
0-28440
7 hours ago
0-0
0 seconds
30179 EtienneC30
author:EtienneC30
feat: uncurrying the product measure gives the product measure --- - [ ] depends on: #30161 - [ ] depends on: #30178 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability blocked-by-other-PR 150/0 Mathlib/Data/Set/Prod.lean,Mathlib/Data/Set/Sigma.lean,Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean,Mathlib/MeasureTheory/MeasurableSpace/Embedding.lean,Mathlib/Probability/ProductMeasure.lean 5 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
0-24899
6 hours ago
0-24899
6 hours ago
0-5
5 seconds
30184 EtienneC30
author:EtienneC30
Indep uncurry --- - [ ] depends on: #30179 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability blocked-by-other-PR 200/18 Mathlib/Data/Set/Prod.lean,Mathlib/Data/Set/Sigma.lean,Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean,Mathlib/MeasureTheory/MeasurableSpace/Embedding.lean,Mathlib/Probability/Independence/InfinitePi.lean,Mathlib/Probability/ProductMeasure.lean 6 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
0-18440
5 hours ago
0-19659
5 hours ago
0-0
0 seconds
30185 alreadydone
author:alreadydone
feat(AlgebraicGeometry): computable/reducible nsmul on elliptic curve --- - [ ] depends on: #30144 - [ ] depends on: #30181 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-algebraic-geometry t-number-theory awaiting-CI blocked-by-other-PR
label:t-algebra$
144/80 Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean,Mathlib/Data/Int/GCD.lean,Mathlib/Data/Nat/BinaryRec.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Init.lean,Mathlib/Data/Nat/Size.lean,MathlibTest/EllipticCurve.lean 10 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
0-5042
1 hour ago
0-5043
1 hour ago
0-1
1 second

Other lists of PRs

Some other lists of PRs which could be useful:

PRs with non-conforming titles

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
28215 5hv5hvnk
author:5hv5hvnk
Draft PR, for Strong and Weak connectivity for Digraphs strong and weak connectivity in Digraphs --- Should resolve a part of issue #26771 Main additions in the PR: 1. Walks in Digraphs (Walk.lean) - Basic walk structure with start and end vertices - Support for walk operations: append, reverse, length - Support functions: getVert, copy, support 2. Walk Decompositions (WalkDecomp.lean) - takeUntil and dropUntil functions to split walks - rotate operation for loop walks - Theorems relating to walk decomposition properties 3. Subgraphs (subgraph.lean) - Subgraph structure for digraphs - Induced and spanning subgraph predicates - Lattice structure (sup, inf, top, bot) - Coercion to standalone digraphs 4. Paths (Paths.lean) - Trail, Path, Circuit, Cycle definitions - Path structure with no repeating vertices - Theorems relating different path types - Basic connectivity definitions (reachable, weakly/strongly connected) 5. Connectivity (Connected.lean) - Reachability relations and properties - Strong and weak connectivity definitions - Connected component types: - StronglyConnectedComponent - WeaklyConnectedComponent - ConnectedComponent - Component properties and equivalence relations --> [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics awaiting-author 1216/0 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 5 3 ['github-actions', 'grunweg'] nobody
41-39366
1 month ago
41-39366
1 month ago
12-41939
12 days
28929 grunweg
author:grunweg
experiment: use `fun_prop` in Homeomorph Can we make the continuity auto-parameters use `fun_prop`? Or perhaps `first |fun_prop; |dsimp; fun_prop`? --- Compared to #13994, it seems this is a much smoother experience. I suspect the RefineDiscTree changes have helped (but that is pure speculation). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 13/5 Mathlib/MeasureTheory/Group/Measure.lean,Mathlib/Topology/Algebra/Algebra/Equiv.lean,Mathlib/Topology/Algebra/Constructions/DomMulAct.lean,Mathlib/Topology/Algebra/ContinuousMonoidHom.lean,Mathlib/Topology/Constructions/SumProd.lean,Mathlib/Topology/Homeomorph/Defs.lean 6 4 ['euprunin', 'github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] PatrickMassot
assignee:PatrickMassot
31-8007
1 month ago
39-12285
1 month ago
39-17599
39 days
27254 yuanyi-350
author:yuanyi-350
2025 imo problem3 - [x] depends on: #28788 - [x] depends on: #28790 - [x] depends on: #28829 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO 231/0 Archive.lean,Archive/Imo/Imo2025Q3.lean,Mathlib/NumberTheory/Padics/PadicVal/Basic.lean 3 28 ['github-actions', 'jsm28', 'kbuzzard', 'leanprover-community-bot-assistant', 'madvorak', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'themathqueen', 'wwylele', 'yuanyi-350'] jsm28
assignee:jsm28
29-60829
29 days ago
31-10095
1 month ago
64-71360
64 days
26310 kckennylau
author:kckennylau
Binary form This PR provides the basic definition of binary forms, which are homogeneous polynomials in two variables. --- - [ ] depends on: #26312 - [ ] depends on: #26313 - [ ] depends on: #26314 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
73/0 Mathlib.lean,Mathlib/RingTheory/MvPolynomial/BinaryForm.lean 2 13 ['MichaelStollBayreuth', 'github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot', 'ocfnash'] ocfnash
assignee:ocfnash
29-49210
29 days ago
45-38881
1 month ago
57-1104
57 days
29082 grunweg
author:grunweg
RFC: tag `IsInducing` and `Is{Open,Closed,}Embedding` with `fun_prop` I have not tested if this is usable in practice; perhaps it is not. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 37/5 Mathlib/Topology/Constructions.lean,Mathlib/Topology/Defs/Induced.lean,Mathlib/Topology/Maps/Basic.lean 3 1 ['github-actions'] jcommelin
assignee:jcommelin
28-8004
28 days ago
36-26656
1 month ago
36-26689
36 days
28219 joelriou
author:joelriou
feat(CategoryTheory): monomorphisms in Type are stable under transfinite compositions --- - [x] depends on: #26030 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 71/0 Mathlib.lean,Mathlib/CategoryTheory/Limits/Types/Shapes.lean,Mathlib/CategoryTheory/Types/Monomorphisms.lean 3 7 ['dagurtomas', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] TwoFX
assignee:TwoFX
8-17257
8 days ago
8-17257
8 days ago
27-18061
27 days
29769 Vierkantor
author:Vierkantor
CI: run a weekly linter workflow This PR adds a workflow analogous to the nightly regression lints, that reports possible refactors using the tactic analysis framework. Those would be too noisy or take too much time to run in regular CI. As a first linter, we have the `mergeWithGrind` linter that reports when a sequence of tactics followed by `grind` can become just `grind`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 102/1 .github/workflows/weekly-lints.yml,Mathlib/Init.lean 2 1 ['github-actions'] bryangingechen
assignee:bryangingechen
8-7993
8 days ago
15-58902
15 days ago
15-58881
15 days
29501 Vierkantor
author:Vierkantor
test(TacticAnalysis): ensure `classical`'s effects are picked up This test case used to fail, and needed a fix to the `classical` tactic in the standard library: - [x] depends on: https://github.com/leanprover/lean4/pull/10332 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge t-meta 10/0 MathlibTest/TacticAnalysis.lean 1 6 ['Vierkantor', 'github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-67319
4 days ago
6-59796
6 days ago
8-66691
8 days
27258 JovanGerb
author:JovanGerb
Imo2020 q6 Original PR: #23431 This PR adds a solution to IMO 2020 Q6. It follows the solution that I found when I was participating in the IMO. I used the statement formalization that was given by @jsm28. TODO: The function `project a b p` that is defined here should be replaced with `signedDist a p (b -ᵥ a)`. --- - [x] depends on: #27257 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO 346/0 Archive.lean,Archive/Imo/Imo2020Q6.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] dwrensha
assignee:dwrensha
4-8000
4 days ago
11-40087
11 days ago
11-41370
11 days
30121 idontgetoutmuch
author:idontgetoutmuch
Principal fiber bundle core A structure capturing what it means to be a principal fibre bundle. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-differential-geometry 227/0 Mathlib.lean,Mathlib/Geometry/Manifold/PrincipalFiberBundle/PrincipalGBundle.lean 2 5 ['github-actions', 'grunweg'] nobody
0-59090
16 hours ago
0-72064
20 hours ago
1-65019
1 day
30034 yonggyuchoimath
author:yonggyuchoimath
feat(Mathlib/AlgebraicGeometry/AffineScheme): add preservation of limits of affine schemes This PR adds simple results about affine schemes. Main changes: * `forgetToSchemeCreatesLimits`: The forgetful functor `AffineScheme ⥤ Scheme` creates small limits. * `forgetToSchemeCreatesColimits`: The dual statement * (written by @erdOne) `preservesLimit_rightOp_Γ`: Shows that `Scheme.Γ.rightOp : Scheme ⥤ CommRingCatᵒᵖ` preserves limits of diagrams consisting of affine schemes. * `preservesColimit_Γ`: The dual statement. This PR reopens #30015, which was acidentally closed by myself. --- - [ ] depends on: #30014 33/0 Mathlib/AlgebraicGeometry/AffineScheme.lean 1 16 ['erdOne', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'yonggyuchoimath'] nobody
0-56472
15 hours ago
5-40321
5 days ago
5-49914
5 days
30070 adomani
author:adomani
CI: remove deprecations automatically This workflow automates the removal of deprecated declarations. The action is currently configured to run once a week to automatically remove all deprecations older than 6 months. This is managed by the `remove_deprecated_decls` action and depends on the two files `Mathlib/Tactic/Linter/CommandRanges.lean` and `Mathlib/Tactic/Linter/FindDeprecations.lean`. The action can be manually triggered and there is the option of passing two dates in `YYYY-MM-DD` format or also the more human "3 months ago", as long as it is a valid input for `date -d`. The lean files take care of identifying the declarations with the deprecated attribute whose `since` field is between the given ranges. Those declarations then get automatically removed and, if there are no errors, the bot creates a PR with the changes. These PRs then go, naturally, through CI, where issues related to having removed the deprecated declarations will be picked up. The bot also posts a comment on Zulip mentioning when the PR has been opened. Co-authored-by: Bryan Gin-ge Chen --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 595/0 .github/workflows/remove_deprecated_decls.yml,Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/CommandRanges.lean,Mathlib/Tactic/Linter/FindDeprecations.lean,MathlibTest/FindDeprecations.lean 6 26 ['Vierkantor', 'adomani', 'bryangingechen', 'github-actions'] nobody
0-36780
10 hours ago
3-717
3 days ago
3-30076
3 days
30162 bryangingechen
author:bryangingechen
ci(label_new_contributor.yml): only trigger when PR is opened Currently, this is triggered even when new bots push a commit to a PR (e.g. the pre-commit.ci bot); adding the `types` filter will prevent the `new-contributor` label being added in such cases. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 8/1 .github/workflows/label_new_contributor.yml 1 4 ['bryangingechen', 'github-actions', 'pechersky'] nobody
0-27550
7 hours ago
0-50284
13 hours ago
0-50265
13 hours
27918 kim-em
author:kim-em
wip: refactor WithBot/WithTop as structures For now we are still relying on `WithBot` and `WithTop` being defeq, but there is no impossible obstacle to converting them *both* to the same structure. This PR begins this effort; the modified files are all compiling, but there are more files that still have problems. Help on this (either ask to push to my branch, PR to my branch, or just adopt the whole thing!) very much appreciated. file-removed 955/354 Mathlib.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Algebra/Order/Monoid/ToMulBot.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Degree/Operations.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/BoxIntegral/Partition/SubboxInduction.lean,Mathlib/Analysis/Meromorphic/Order.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Data/Countable/Basic.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/ENat/Defs.lean,Mathlib/Data/EReal/Operations.lean,Mathlib/Data/Finset/WithBot.lean,Mathlib/Data/Fintype/WithTopBot.lean,Mathlib/Data/List/MinMax.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Ordmap/Invariants.lean,Mathlib/Data/Ordmap/Ordset.lean,Mathlib/Data/Sum/Order.lean,Mathlib/Geometry/Manifold/PartitionOfUnity.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/Logic/Embedding/WithBot.lean,Mathlib/Logic/Equiv/WithBot.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Real.lean,Mathlib/MeasureTheory/Group/Measure.lean,Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean,Mathlib/Order/Category/BddLat.lean,Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/GaloisConnection/Basic.lean,Mathlib/Order/Hom/WithTopBot.lean,Mathlib/Order/Interval/Basic.lean,Mathlib/Order/Interval/Finset/Defs.lean,Mathlib/Order/Interval/Set/WithBotTop.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Order/Set.lean,Mathlib/Order/SuccPred/Basic.lean,Mathlib/Order/TypeTags.lean,Mathlib/Order/WithBot/Basic.lean,Mathlib/Order/WithBot/BooleanAlgebra.lean,Mathlib/Order/WithBot/NAry.lean,Mathlib/RingTheory/UniqueFactorizationDomain/FactorSet.lean,Mathlib/SetTheory/Cardinal/ENat.lean,Mathlib/Topology/Algebra/Ring/Real.lean,Mathlib/Topology/Category/LightProfinite/Sequence.lean,Mathlib/Topology/Compactification/OnePoint/Basic.lean,Mathlib/Topology/Instances/ENat.lean,MathlibTest/lift.lean 56 11 ['eric-wieser', 'github-actions', 'kim-em', 'mathlib4-merge-conflict-bot'] nobody
0-20266
5 hours ago
1-68935
1 day ago
48-79961
48 days
27844 CBirkbeck
author:CBirkbeck
Add q-expansion identities for Eisenstein series. This is PR contains some q-expansion identities that are needed to give the q-expansions of Eisenstein series, which will be added as part of #27606. --- - [x] depends on: #27212 - [x] depends on: #27837 - [x] depends on: #27839 - [x] depends on: #27840 - [x] depends on: #27841 - [x] depends on: #26016 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge t-number-theory 257/0 Mathlib.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Complex/SummableUniformlyOn.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/NumberTheory/LSeries/RiemannZeta.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/Defs.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/QExpansion.lean 7 44 ['CBirkbeck', 'MichaelStollBayreuth', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-15380
4 hours ago
0-26969
7 hours ago
0-61485
17 hours
25474 adomani
author:adomani
test for .lean/.md check A test PR for #25473. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-linter merge-conflict 10/1 .github/workflows/lint_and_suggest_pr.yml,Mathlib.lean,Mathlib/NumberTheory/NumberField/CMField.Lean 3 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
60-61062
1 month ago
60-61062
1 month ago
29-67280
29 days
28933 artie2000
author:artie2000
WIP chore(Data): correct definition for `single_apply` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 101/98 Counterexamples/DirectSumIsInternal.lean,Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/Group/Finsupp.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Analysis/InnerProductSpace/Projection/FiniteDimensional.lean,Mathlib/Combinatorics/Nullstellensatz.lean,Mathlib/Data/DFinsupp/Defs.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/DFinsupp/Sigma.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Finsupp/SMul.lean,Mathlib/Data/Finsupp/Single.lean,Mathlib/Data/Finsupp/ToDFinsupp.lean,Mathlib/LinearAlgebra/Basis/Basic.lean,Mathlib/LinearAlgebra/Basis/Defs.lean,Mathlib/LinearAlgebra/Basis/Prod.lean,Mathlib/LinearAlgebra/DFinsupp.lean,Mathlib/LinearAlgebra/Finsupp/Defs.lean,Mathlib/LinearAlgebra/Finsupp/LinearCombination.lean,Mathlib/LinearAlgebra/Finsupp/Supported.lean,Mathlib/LinearAlgebra/FreeModule/Basic.lean,Mathlib/LinearAlgebra/FreeModule/Finite/CardQuotient.lean,Mathlib/LinearAlgebra/LinearIndependent/Defs.lean,Mathlib/LinearAlgebra/Matrix/ToLin.lean,Mathlib/LinearAlgebra/Multilinear/DFinsupp.lean,Mathlib/LinearAlgebra/StdBasis.lean,Mathlib/RingTheory/MvPolynomial/Groebner.lean 31 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
38-12816
1 month ago
38-12817
1 month ago
0-75271
20 hours
29345 adomani
author:adomani
test: automatically remove deprecations from before 2025-02-31 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 201/1358 Mathlib/Algebra/Category/Grp/Basic.lean,Mathlib/Algebra/Category/MonCat/Basic.lean,Mathlib/Algebra/Order/Field/Canonical.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Analysis/InnerProductSpace/Positive.lean,Mathlib/Analysis/InnerProductSpace/Projection/Basic.lean,Mathlib/Combinatorics/Matroid/Circuit.lean,Mathlib/Combinatorics/Matroid/Closure.lean,Mathlib/Combinatorics/Matroid/Minor/Restrict.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/Primrec.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Fin/SuccPred.lean,Mathlib/Data/Finite/Card.lean,Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Fintype/BigOperators.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Cycle.lean,Mathlib/Data/List/GetD.lean,Mathlib/Data/List/MinMax.lean,Mathlib/Data/List/ModifyLast.lean,Mathlib/Data/List/Nodup.lean,Mathlib/Data/List/NodupEquivFin.lean,Mathlib/Data/List/OfFn.lean,Mathlib/Data/List/ReduceOption.lean,Mathlib/Data/List/Rotate.lean,Mathlib/Data/List/Scan.lean,Mathlib/Data/List/TakeDrop.lean,Mathlib/Data/List/Zip.lean,Mathlib/Data/Matrix/ColumnRowPartitioned.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Seq/Defs.lean,Mathlib/Data/Set/Finite/Basic.lean,Mathlib/Data/Set/List.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Data/Stream/Init.lean,Mathlib/Data/String/Lemmas.lean,Mathlib/Data/Sum/Basic.lean,Mathlib/Geometry/Manifold/ContMDiff/Constructions.lean,Mathlib/Geometry/RingedSpace/Basic.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/Pointwise.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Basic.lean,Mathlib/LinearAlgebra/Dimension/Constructions.lean,Mathlib/LinearAlgebra/Dimension/RankNullity.lean,Mathlib/LinearAlgebra/LinearIndependent/Basic.lean,Mathlib/LinearAlgebra/LinearIndependent/Defs.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Matrix/Hermitian.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/LinearAlgebra/Matrix/Spectrum.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Logic/Equiv/List.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/AEMeasurable.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Basic.lean,Mathlib/MeasureTheory/Function/ContinuousMapDense.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Function/LpSeminorm/ChebyshevMarkov.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Defs.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Trim.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/Complete.lean,Mathlib/MeasureTheory/Function/LpSpace/Indicator.lean,Mathlib/MeasureTheory/Function/StronglyMeasurable/Lp.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Integral/CircleTransform.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Countable.lean,Mathlib/MeasureTheory/Measure/Content.lean,Mathlib/MeasureTheory/Measure/Count.lean,Mathlib/ModelTheory/Basic.lean,Mathlib/ModelTheory/Definability.lean,Mathlib/ModelTheory/ElementarySubstructures.lean,Mathlib/ModelTheory/LanguageMap.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Substructures.lean,Mathlib/ModelTheory/Syntax.lean,Mathlib/NumberTheory/Divisors.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/IsBoundedAtImInfty.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/Basic.lean,Mathlib/NumberTheory/NumberField/FinitePlaces.lean,Mathlib/NumberTheory/NumberField/House.lean,Mathlib/Order/Filter/AtTopBot/Monoid.lean,Mathlib/Order/Filter/AtTopBot/Ring.lean,Mathlib/Order/GaloisConnection/Basic.lean,Mathlib/Order/Max.lean,Mathlib/Order/WithBot.lean,Mathlib/Probability/IdentDistrib.lean,Mathlib/Probability/Independence/Integrable.lean,Mathlib/Probability/Kernel/Composition/IntegralCompProd.lean,Mathlib/Probability/Kernel/Invariance.lean 132 0 [] nobody
29-45353
29 days ago
29-45353
29 days ago
0-49
49 seconds
29574 JarodUW
author:JarodUW
Regular local rings are domains We have added three new files in Mathlib/RingTheory/LocalRing * EmbeddingDimension.lean * LocalRingDimension.lean * RegularLocalRings.lean We have added two lemmas and an instance in Mathlib/RingTheory/LocalRing/RingHom/Basic.lean This work was done by Jarod Alper and Brian Nugent. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor merge-conflict 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
18-85402
18 days ago
18-85403
18 days ago
3-7974
3 days
29605 alreadydone
author:alreadydone
experiment(Algebra): unbundle npow/zpow from Monoid/InvDivMonoid --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-CI merge-conflict
label:t-algebra$
1527/1020 Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Defs.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Defs.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/BigOperators/Ring/Multiset.lean,Mathlib/Algebra/Category/MonCat/ForgetCorepresentable.lean,Mathlib/Algebra/Divisibility/Basic.lean,Mathlib/Algebra/Divisibility/Units.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Field/Power.lean,Mathlib/Algebra/Field/Rat.lean,Mathlib/Algebra/Group/Action/Basic.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/Commute/Basic.lean,Mathlib/Algebra/Group/Commute/Defs.lean,Mathlib/Algebra/Group/Commute/Units.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Group/Even.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Fin/Basic.lean,Mathlib/Algebra/Group/Finsupp.lean,Mathlib/Algebra/Group/Hom/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Hom/End.lean,Mathlib/Algebra/Group/Hom/Instances.lean,Mathlib/Algebra/Group/Idempotent.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/Group/Int/Defs.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Irreducible/Lemmas.lean,Mathlib/Algebra/Group/Nat/Defs.lean,Mathlib/Algebra/Group/Nat/Hom.lean,Mathlib/Algebra/Group/NatPowAssoc.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/PUnit.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/Semiconj/Basic.lean,Mathlib/Algebra/Group/Semiconj/Defs.lean,Mathlib/Algebra/Group/Semiconj/Units.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Group/Subgroup/Lattice.lean,Mathlib/Algebra/Group/Subgroup/ZPowers/Basic.lean,Mathlib/Algebra/Group/Submonoid/BigOperators.lean,Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Support.lean,Mathlib/Algebra/Group/Torsion.lean,Mathlib/Algebra/Group/TransferInstance.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Group/ULift.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Commute.lean,Mathlib/Algebra/GroupWithZero/Conj.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Divisibility.lean,Mathlib/Algebra/GroupWithZero/Hom.lean,Mathlib/Algebra/GroupWithZero/Indicator.lean,Mathlib/Algebra/GroupWithZero/InjSurj.lean,Mathlib/Algebra/GroupWithZero/Semiconj.lean,Mathlib/Algebra/GroupWithZero/ULift.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/GroupWithZero/Units/Lemmas.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/NoZeroSMulDivisors/Defs.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/BigOperators/Group/List.lean,Mathlib/Algebra/Order/BigOperators/Group/Multiset.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/List.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/Multiset.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Action.lean,Mathlib/Algebra/Order/Group/Basic.lean,Mathlib/Algebra/Order/Group/DenselyOrdered.lean,Mathlib/Algebra/Order/Group/Finset.lean,Mathlib/Algebra/Order/Group/Lattice.lean,Mathlib/Algebra/Order/Group/Multiset.lean,Mathlib/Algebra/Order/Group/PosPart.lean,Mathlib/Algebra/Order/Group/Synonym.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean 162 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
18-38548
18 days ago
18-38549
18 days ago
0-2
2 seconds
28067 grunweg
author:grunweg
Docstring enumerations Tracking PR; to be split. Audit all ocurrences of `^ \S`; exhaustive. --- - [x] depends on: #28068 - [x] depends on: #28069 - [ ] depends on: #28070 - [x] depends on: #28118 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR 264/263 Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/BrauerGroup/Defs.lean,Mathlib/Algebra/Module/LinearMap/Polynomial.lean,Mathlib/CategoryTheory/Abelian/NonPreadditive.lean,Mathlib/CategoryTheory/EqToHom.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Limits/Pi.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Sites/Grothendieck.lean,Mathlib/CategoryTheory/Sites/Pretopology.lean,Mathlib/Condensed/Discrete/Characterization.lean,Mathlib/FieldTheory/ChevalleyWarning.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/RootSystem/GeckConstruction/Basic.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/OuterMeasure/Basic.lean,Mathlib/MeasureTheory/OuterMeasure/Defs.lean,Mathlib/NumberTheory/FLT/Basic.lean,Mathlib/NumberTheory/LSeries/PrimesInAP.lean,Mathlib/RingTheory/Grassmannian.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean,Mathlib/RingTheory/WittVector/Teichmuller.lean,Mathlib/Tactic/Bound.lean,Mathlib/Tactic/Bound/Attribute.lean,Mathlib/Tactic/ENatToNat.lean,Mathlib/Tactic/FBinop.lean,Mathlib/Tactic/IntervalCases.lean,Mathlib/Tactic/TermCongr.lean,Mathlib/Util/Notation3.lean,Mathlib/Util/Superscript.lean,docs/Conv/Guide.lean 38 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
13-54217
13 days ago
13-54217
13 days ago
0-2904
48 minutes
28718 imbrem
author:imbrem
Added 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 new-contributor t-category-theory awaiting-author blocked-by-other-PR 290/0 Mathlib.lean,Mathlib/CategoryTheory/ChosenFiniteCoproducts.lean 2 8 ['YaelDillies', 'github-actions', 'imbrem', 'mathlib4-dependent-issues-bot', 'robin-carlier'] nobody
0-67825
18 hours ago
0-67826
18 hours ago
0-24930
6 hours

PRs without an area label

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
28833 yury-harmonic
author:yury-harmonic
feat(MvPolynomial/Expand): more lemmas --- - [x] depends on: #28832 - [x] depends on: #28830 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 88/18 Mathlib/Algebra/MvPolynomial/Eval.lean,Mathlib/Algebra/MvPolynomial/Expand.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] dwrensha
assignee:dwrensha
27-7996
27 days ago
40-24737
1 month ago
40-26487
40 days
29530 ShreckYe
author:ShreckYe
feat(Dynamics/PeriodicPts): some theorems for `Pi.map` in `Dynamics/PeriodicPts` analogous to those for `Prod.map` Split from #29204. Some namespace prefixes are added in `GroupTheory/OrderOfElement.lean` to distinguish the extra imports introduced. - [ ] depends on: #29528 large-import 77/8 Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/Dynamics/PeriodicPts/Lemmas.lean,Mathlib/GroupTheory/OrderOfElement.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] dupuisf
assignee:dupuisf
15-7993
15 days ago
22-33826
22 days ago
22-34480
22 days
29400 ShreckYe
author:ShreckYe
feat(`Algebra/BigOperators`): products of the results of insertion and removal on tuples and lists, and some needed lemmas large-import 102/0 Mathlib.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Defs.lean,Mathlib/Algebra/BigOperators/Group/Vector/Basic.lean,Mathlib/Data/Fin/Tuple/Basic.lean 6 6 ['ShreckYe', 'bryangingechen', 'eric-wieser', 'github-actions'] bryangingechen
assignee:bryangingechen
14-19837
14 days ago
26-55789
26 days ago
26-55834
26 days
29587 uniwuni
author:uniwuni
feat(GroupTheory/Finiteness): define finitely generated semigroups We define finitely generated semigroups and basics similarly to monoids and groups and prove that semigroups and monoids remain finitely generated when a congruence is quotiented out. This will be important when further developing semigroup theory. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 259/14 Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/GroupTheory/Finiteness.lean 2 3 ['github-actions', 'plp127', 'uniwuni'] dupuisf
assignee:dupuisf
14-8004
14 days ago
21-54188
21 days ago
21-54166
21 days
28026 kim-em
author:kim-em
feat: grind annotations for `Disjoint` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author 90/50 Archive/Imo/Imo2001Q3.lean,Mathlib/Data/Set/Disjoint.lean,Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/Order/BoundedOrder/Lattice.lean,Mathlib/Order/CompleteLattice/MulticoequalizerDiagram.lean,Mathlib/Order/Disjoint.lean,Mathlib/Order/Lattice.lean 7 17 ['chrisflav', 'github-actions', 'grunweg', 'kim-em', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] alexjbest
assignee:alexjbest
8-43935
8 days ago
8-43935
8 days ago
48-60022
48 days
28728 or4nge19
author:or4nge19
feat(PerronFrobenius): introduce Irreducible and Primitive Matrices and relations to Quiver This PR develops a graph-theoretic interface for studying nonnegative square matrices over `ℝ` through the quiver formed by their strictly positive entries. It shows the equivalence between positivity of suitable matrix powers and existence of directed paths in this quiver. ------------ - [ ] depends on: #28696 - [ ] depends on:#29754 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-author 289/0 Mathlib.lean,Mathlib/Combinatorics/Quiver/Path/StronglyConnected.lean,Mathlib/LinearAlgebra/Matrix/Irreducible/Defs.lean 3 6 ['github-actions', 'j-loreaux', 'mathlib4-dependent-issues-bot', 'or4nge19'] nobody
7-65014
7 days ago
20-29974
20 days ago
0-32474
9 hours
29241 yoh-tanimoto
author:yoh-tanimoto
feat(Analysis/InnerProductSpace/Orthogonal): add duplicates for `ClosedSubmodule` add duplicates of definitions and API's for `ClosedSubmodule` in an `InnerProductSpace`. motivation: when one considers a Hilbert space (`CompleteSpace`), it is more natural to consider `ClosedSubmodule`s. They form a complete lattice and satisfy `sup_orthogonal` #29243. - [x] depends on: #29230 for `Lattice` `CompleteLattice` awaiting-author 191/0 Mathlib/Analysis/InnerProductSpace/Orthogonal.lean 1 7 ['github-actions', 'mathlib4-dependent-issues-bot', 'sgouezel', 'yoh-tanimoto'] sgouezel
assignee:sgouezel
7-27991
7 days ago
8-50099
8 days ago
12-74361
12 days
29110 NotWearingPants
author:NotWearingPants
feat(Counterexamples): Euler's sum of powers conjecture feat(Counterexamples): Euler's sum of powers conjecture --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip maintainer-merge new-contributor 158/0 Counterexamples.lean,Counterexamples/EulerSumOfPowers.lean 2 43 ['MichaelStollBayreuth', 'NotWearingPants', 'eric-wieser', 'github-actions', 'tb65536', 'urkud'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
7-26967
7 days ago
7-27023
7 days ago
24-25032
24 days
30038 JovanGerb
author:JovanGerb
feat(push): `@[push]` annotations for `fun` This PR adds the annotations for the tactics `push fun _ ↦ _` and `pull fun _ ↦ _` and the simprocs `pushFun` and `pullFun`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 28/6 Mathlib/Algebra/Notation/Pi/Defs.lean,Mathlib/Data/Nat/Cast/Basic.lean,Mathlib/Order/Lattice.lean,MathlibTest/push.lean 4 1 ['github-actions'] nobody
6-11950
6 days ago
6-12018
6 days ago
6-11997
6 days
29512 grunweg
author:grunweg
feat: check for PR titles which do not start with "feat" etc. We ignore draft PRs and PRs with the WIP label. The set of checks is intentionally kept small, and could be expanded in the future. --- More basic version of #16303: given that mathlib's statistics will use the PR kind, let's make sure PR kinds are somewhat appropriate. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 365/0 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/ValidatePRTitle.lean,lakefile.lean,scripts/README.md,scripts/check_title_labels.lean 10 17 ['bryangingechen', 'eric-wieser', 'github-actions', 'grunweg'] bryangingechen
assignee:bryangingechen
5-75923
5 days ago
23-38358
23 days ago
23-38336
23 days
30042 JovanGerb
author:JovanGerb
feat(push): `@[push]` attributes for `∈` in `Set`, `Finset` and `Multiset` This PR adds `@[push]` annotations for the membership relations, for `Set`, `Finset` and `Multiset`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 169/104 Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/ListOfFn.lean,Mathlib/Algebra/Order/Group/Multiset.lean,Mathlib/Data/DFinsupp/Interval.lean,Mathlib/Data/Finmap.lean,Mathlib/Data/Finset/BooleanAlgebra.lean,Mathlib/Data/Finset/Dedup.lean,Mathlib/Data/Finset/Defs.lean,Mathlib/Data/Finset/Disjoint.lean,Mathlib/Data/Finset/Filter.lean,Mathlib/Data/Finset/Image.lean,Mathlib/Data/Finset/Insert.lean,Mathlib/Data/Finset/Lattice/Basic.lean,Mathlib/Data/Finset/Lattice/Fold.lean,Mathlib/Data/Finset/Pi.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Finset/Range.lean,Mathlib/Data/Finset/SDiff.lean,Mathlib/Data/Finset/Sigma.lean,Mathlib/Data/Finset/Sum.lean,Mathlib/Data/Finset/Sups.lean,Mathlib/Data/Finset/Union.lean,Mathlib/Data/Fintype/Defs.lean,Mathlib/Data/Multiset/AddSub.lean,Mathlib/Data/Multiset/Antidiagonal.lean,Mathlib/Data/Multiset/Bind.lean,Mathlib/Data/Multiset/Dedup.lean,Mathlib/Data/Multiset/Defs.lean,Mathlib/Data/Multiset/Filter.lean,Mathlib/Data/Multiset/FinsetOps.lean,Mathlib/Data/Multiset/MapFold.lean,Mathlib/Data/Multiset/Pi.lean,Mathlib/Data/Multiset/Range.lean,Mathlib/Data/Multiset/Replicate.lean,Mathlib/Data/Multiset/Sort.lean,Mathlib/Data/Multiset/Sum.lean,Mathlib/Data/Multiset/UnionInter.lean,Mathlib/Data/Multiset/ZeroCons.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Order/Interval/Finset/Defs.lean,Mathlib/Order/Interval/Multiset.lean,Mathlib/Order/Interval/Set/Defs.lean,Mathlib/Order/SetNotation.lean,MathlibTest/push.lean 48 1 ['github-actions'] nobody
5-63253
5 days ago
6-9064
6 days ago
6-9043
6 days
30039 JovanGerb
author:JovanGerb
feat(push): `@[push]` annotations for `Real.log` This PR adds `push` annotations, and tests for `Real.log`. It also updates the `#push` and `#pull` commands so that they can take a discharger, and can take any head. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 45/18 Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Tactic/Push.lean,MathlibTest/push.lean 4 1 ['github-actions'] nobody
5-62871
5 days ago
6-11955
6 days ago
6-11934
6 days
30037 linesthatinterlace
author:linesthatinterlace
feat: Fin.find update We currently define `Fin.find` in a way that is redundant (in the sense that it is just equivalent to `Fin.find?` in batteries). This PR replaces it with a definition that works closer to `Nat.find`, and links the new definition of `Fin.find` to `Fin.find?` in the natural way. --- - [ ] depends on: batteries#1431 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 137/103 Mathlib/Data/Fin/Tuple/Basic.lean,lake-manifest.json 2 6 ['github-actions', 'linesthatinterlace', 'llllvvuu', 'mathlib4-merge-conflict-bot'] nobody
4-35227
4 days ago
4-35245
4 days ago
6-4753
6 days
30073 JovanGerb
author:JovanGerb
feat: new `by_cases!` tactic This PR defines the `by_cases! h : p` tactic, which is a macro for `by_cases h : p` followed by a `try push_neg at h` in the second goal. We use `try push_neg` instead of `push_neg` to make the tactic also succeed when no negation is pushed. Should this maybe throw an warning? This PR also refactors many proofs to use `by_cases!` The tactic implementation can be found in the first commit. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import 574/717 Archive/Imo/Imo2024Q6.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Mathlib.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/Category/Grp/Adjunctions.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/GCDMonoid/Finset.lean,Mathlib/Algebra/GCDMonoid/Multiset.lean,Mathlib/Algebra/GCDMonoid/Nat.lean,Mathlib/Algebra/Group/UniqueProds/Basic.lean,Mathlib/Algebra/Homology/Embedding/TruncGE.lean,Mathlib/Algebra/Homology/HomotopyCofiber.lean,Mathlib/Algebra/Module/PID.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Polynomial/CoeffList.lean,Mathlib/Algebra/Polynomial/Degree/Lemmas.lean,Mathlib/Algebra/Polynomial/Degree/Operations.lean,Mathlib/Algebra/Polynomial/Degree/TrailingDegree.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Polynomial/HasseDeriv.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/Algebra/Polynomial/OfFn.lean,Mathlib/Algebra/Polynomial/Splits.lean,Mathlib/AlgebraicTopology/DoldKan/Decomposition.lean,Mathlib/AlgebraicTopology/DoldKan/Faces.lean,Mathlib/AlgebraicTopology/DoldKan/Projections.lean,Mathlib/AlgebraicTopology/SimplicialObject/II.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Asymptotics/SuperpolynomialDecay.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unique.lean,Mathlib/Analysis/CStarAlgebra/Unitization.lean,Mathlib/Analysis/Calculus/FDeriv/Extend.lean,Mathlib/Analysis/Calculus/FDeriv/Norm.lean,Mathlib/Analysis/Calculus/LocalExtr/Rolle.lean,Mathlib/Analysis/Calculus/SmoothSeries.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Complex/OpenMapping.lean,Mathlib/Analysis/Complex/PhragmenLindelof.lean,Mathlib/Analysis/Convex/Deriv.lean,Mathlib/Analysis/Convex/EGauge.lean,Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/Hofer.lean,Mathlib/Analysis/InnerProductSpace/Orientation.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/Meromorphic/NormalForm.lean,Mathlib/Analysis/Normed/Group/Ultra.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Unbundled/RingSeminorm.lean,Mathlib/Analysis/Normed/Unbundled/SeminormFromBounded.lean,Mathlib/Analysis/Normed/Unbundled/SmoothingSeminorm.lean,Mathlib/Analysis/NormedSpace/Multilinear/Basic.lean,Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Analysis/Polynomial/Basic.lean,Mathlib/Analysis/SpecialFunctions/Complex/Log.lean,Mathlib/Analysis/SpecialFunctions/Log/PosLog.lean,Mathlib/Analysis/SpecialFunctions/Log/Summable.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Complex.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/Analysis/SumOverResidueClass.lean,Mathlib/CategoryTheory/Limits/Shapes/Preorder/WellOrderContinuous.lean,Mathlib/Combinatorics/Additive/RuzsaCovering.lean,Mathlib/Combinatorics/Enumerative/Composition.lean,Mathlib/Combinatorics/HalesJewett.lean,Mathlib/Combinatorics/Hall/Finite.lean,Mathlib/Combinatorics/Matroid/IndepAxioms.lean,Mathlib/Combinatorics/Nullstellensatz.lean,Mathlib/Combinatorics/SetFamily/Intersecting.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Equitabilise.lean,Mathlib/Combinatorics/SimpleGraph/Tutte.lean,Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Control/LawfulFix.lean,Mathlib/Data/Finsupp/MonomialOrder/DegLex.lean,Mathlib/Data/Int/Order/Basic.lean,Mathlib/Data/List/Intervals.lean,Mathlib/Data/Nat/Choose/Factorization.lean,Mathlib/Data/Nat/Digits/Lemmas.lean,Mathlib/Data/Nat/Nth.lean,Mathlib/Data/Real/Embedding.lean,Mathlib/Data/Set/Card/Arithmetic.lean,Mathlib/Data/Set/Equitable.lean,Mathlib/Data/ZMod/Basic.lean,Mathlib/FieldTheory/JacobsonNoether.lean,Mathlib/Geometry/Euclidean/Angle/Oriented/Basic.lean,Mathlib/Geometry/Euclidean/Sphere/Tangent.lean,Mathlib/Geometry/Euclidean/Triangle.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Geometry/Manifold/IntegralCurve/UniformTime.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/LinearAlgebra/Basis/Defs.lean 203 2 ['JovanGerb', 'github-actions'] nobody
3-56076
3 days ago
4-36830
4 days ago
4-36874
4 days
29314 Louddy
author:Louddy
feat(SkewMonoidAlgebra): Lifts for skew monoid algebras Lemmas about different kinds of "lifts" to `SkewMonoidAlgebra` - Similar in spirit to the MonoidAlgebra.Lift file. Co-authored-by: María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)> --- - [x] depends on: #29310 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 238/2 Mathlib.lean,Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/Algebra/SkewMonoidAlgebra/Lift.lean 3 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] riccardobrasca
assignee:riccardobrasca
2-59654
2 days ago
4-27502
4 days ago
4-32922
4 days
30133 smmercuri
author:smmercuri
feat: `WithVal v` and `WithVal w` are isomorphic as uniform spaces when `v` and `w` are equivalent valuations --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 93/0 Mathlib/Algebra/Order/Hom/Ring.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 2 1 ['github-actions'] nobody
1-35815
1 day ago
1-35887
1 day ago
1-35866
1 day
29976 AntoineChambert-Loir
author:AntoineChambert-Loir
feat(Topology/Semicontinuous): lower bounds on compact sets Prove that lower semicontinuous functions attain their lower bound on nonempty compact sets, and the analogous lemma for upper semicontinuous functions. By the way, add several basic results for semicontinuous functions, relating the WithinAt, At, On versions. Co-authored with @ADedecker --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 300/1 Mathlib/Order/Filter/Extr.lean,Mathlib/Topology/Semicontinuous.lean 2 1 ['github-actions'] TwoFX
assignee:TwoFX
1-7998
1 day ago
8-27363
8 days ago
8-27342
8 days
30149 NotWearingPants
author:NotWearingPants
feat(Combinatorics/SimpleGraph/Hamiltonian): `p.support.get` and `p.getVert` define equivalences with `Fin` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 38/2 Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Walk.lean,Mathlib/Data/List/NodupEquivFin.lean 3 1 ['github-actions'] nobody
0-56266
15 hours ago
0-84573
23 hours ago
0-84560
23 hours
29960 yonggyuchoimath
author:yonggyuchoimath
feat(Algebra/Category/Ring): equalizers of pushout maps of tensor product inclusions This PR defines a ring map `S →ₗ[R] S ⊗[R] S : s ↦ (s ⊗ₜ[R] 1) - (1 ⊗ₜ[R] s)` for an `R`-algebra `S`, and show that its kernel is exactly (the image of) `R` if `S` is faithfully flat over `R`. Changes: * `TensorProduct.AlgebraTensorModule.distribBaseChange`: Origianlly takes `M` and `N`, where `M` is an `R`-module with an additional instance `IsScalarTower R A M`. This is unnecessary, so I changed the `M` and `N` into `N` and `Q`, now both of which are merely modules over `R`. Main results : * Add compatibility of `Algebra.TensorProduct.includeLeft` (or `Algebra.TensorProduct.includeRight`) with `TensorProduct.AlgebraTensorModule.distribBaseChange` and `LinearMap.lTensor` * Define `Algebra.TensorProduct.includeLeftSubRight`, which is the `R`-linear map `S →ₗ[R] S ⊗[R] S` sending `s : S` to `(s ⊗ₜ[R] 1) - (1 ⊗ₜ[R] s)`. * `Algebra.TensorProduct.exactIncludeLeftSubRight_of_faithfullyFlat`: the pair `algebraMap : R → S` and `includeLeftSubRight R S : S → S ⊗[R] S` is exact if `S` is a faithfully flat `R`-algebra. new-contributor 229/1 Mathlib.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/IncludeLeftSubRight.lean 4 3 ['erdOne', 'github-actions', 'yonggyuchoimath'] nobody
0-44399
12 hours ago
3-28285
3 days ago
5-62757
5 days
30150 imbrem
author:imbrem
feat(CategoryTheory/Monoidal): to_additive for MonoidalCategory Added `AddMonoidalCategory`, the additive version of `MonoidalCategory`. --- As discussed in #28718; I added an `AddMonoidalCategory` struct and tagged `MonoidalCategory` with `to_additive`, along with the lemmas in `Category.lean`. To get this to work, I needed to _remove_ the `to_additive` attributes in `Discrete.lean`, since otherwise the instances and lemmas within would be ill-typed (as MonoidalCategory would be replaced with AddMonoidalCategory). We simply implement the additive variants by hand instead. I think this is the right approach, since under this framework the "correct" additive version of `Discrete.lean` would be mapping an `AddMonoid` to an `AddMonoidalCategory`. Next steps would be to: - Make `monoidal_coherence` and `coherence` support `AddMonoidalCategory` - Add `CocartesianMonoidalCategory` extending `AddMonoidalCategory` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor 408/126 Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Tactic/ToAdditive/GuessName.lean 3 5 ['JovanGerb', 'YaelDillies', 'github-actions', 'imbrem'] nobody
0-11014
3 hours ago
0-83431
23 hours ago
0-83470
23 hours
29788 robertmaxton42
author:robertmaxton42
feat (Topology): adds bundled continuous maps for sum, sigma, subtype, mapsto, inclusion Adds a collection of bundled continuous maps and homeomorphisms, and helper lemmas for working with their compositions. Bundling of existing continuity lemmas: * `ContinuousMap.subtypeVal` * `ContinuousMap.inl` and `.inr`; `ContinuousMap.sum` bundles `Continuous.sumElim`; `ContinuousMap.sumMap`, which is a quotient map when both components are quotient maps * `ContinuousMap.sigmaMap`, which is a quotient map when given a family of quotient maps * `ContinuousMap.mapsTo` bundles `ContinuousOn.restrict_mapsTo` New functions: * `ContinuousMap.preimageValIncl : C(s ↓∩ t, t)` and `.inclPreimageVal C(s, t ↓∩ s)`, and their unbundled functions in `Set` * `Homeomorph.Set.preimageVal` witnesses that the two are opposite directions of a homeomorphism * Descending from a coherent set of subspaces is a quotient map The primary use for these bundled maps is easy composition and the ability to introduce them by rewriting right-to-left: it is much more convenient to write `subtypeVal.comp _` than to use either the anonymous constructor (which doesn't work in any position without an expected type) or `ContinuousMap.mk` (which will disappear as soon as it is coerced to a function, making it difficult to use in mixed-categorical contexts where many maps can only be reduced by introducing a composition with some other map.) This PR is part of a family of PRs that ultimately construct transformations in both directions between the concrete `Topology.RelCWComplex` and abstract `TopCat.RelativeCWComplex`. `.mapsTo` in particular bundles together a couple of potentially nontrivial proofs in a way that makes them easy to refer to later; I use it and `.subtypeVal` particularly heavily later in a dependent PR to build the cell inclusion maps on both sides of the equivalence. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import 226/3 Mathlib/Data/Set/Subset.lean,Mathlib/Topology/Category/TopCat/Limits/Products.lean,Mathlib/Topology/Coherent.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/Constructions/SumProd.lean,Mathlib/Topology/ContinuousMap/Basic.lean,scripts/noshake.json 7 6 ['adamtopaz', 'github-actions', 'robertmaxton42'] adamtopaz
assignee:adamtopaz
0-5488
1 hour ago
0-5508
1 hour ago
15-1590
15 days
24100 eric-wieser
author:eric-wieser
feat: restore some explicit binders from Lean 3 Part of #24099 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt merge-conflict awaiting-author 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
131-47183
4 months ago
131-47185
4 months ago
34-33204
34 days
29076 yury-harmonic
author:yury-harmonic
feat(BigOperators/ModEq): new file --- - [ ] depends on: #29072 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 319/15 Mathlib.lean,Mathlib/Algebra/BigOperators/ModEq.lean,Mathlib/Data/Int/ModEq.lean,Mathlib/Data/Nat/ModEq.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
36-26215
1 month ago
36-33053
1 month ago
0-726
12 minutes
28819 ScottCarnahan
author:ScottCarnahan
feat (Data/Finsupp): define convolution smul for finsupps on formal functions This is a generalization of the multiplication action of the ring of Laurent polynomials on the space of formal power series with unbounded pole terms. --- - [ ] depends on: #28876 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 127/15 Mathlib.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Order/AddTorsor.lean,Mathlib/Data/Finset/SMulAntidiagonal.lean,Mathlib/Data/Finsupp/PointwiseSMul.lean,Mathlib/Data/Set/SMulAntidiagonal.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean 7 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
34-57080
1 month ago
34-62474
1 month ago
1-6093
1 day
28905 grunweg
author:grunweg
feat: immersions are locally embeddings Hopefully, this can be used for the topological portion of #28865. (That part is not certain yet, the rest works.) --- TODO: move two helper results about embeddings to their proper place; perhaps even PR separately - [ ] depends on: #28793 - [ ] depends on: #28796 - [ ] depends on: #28853 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR 792/7 Mathlib.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Geometry/Manifold/ContMDiff/Atlas.lean,Mathlib/Geometry/Manifold/IsImmersionEmbedding.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Topology/PartialHomeomorph.lean,docs/references.bib,temp_.sh 10 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
25-21073
25 days ago
25-21074
25 days ago
0-617
10 minutes
29077 grunweg
author:grunweg
feat(Manifold/Instances/Icc): golf smoothness proof using immersions Prove that the inclusion of an interval into the real numbers is a smooth immersion, and use this to golf the proof that this inclusion is smooth. TODO: right now, the computation doesn't check out; I need to tweak the charts I have. But that is surely doable. A future PR will prove it is a smooth embedding. --- - [ ] depends on: #28865 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR 1122/56 Mathlib.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Geometry/Manifold/ContMDiff/Atlas.lean,Mathlib/Geometry/Manifold/ContMDiff/Defs.lean,Mathlib/Geometry/Manifold/Instances/Icc.lean,Mathlib/Geometry/Manifold/IsImmersionEmbedding.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Topology/PartialHomeomorph.lean,docs/references.bib,temp_.sh 13 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
25-21072
25 days ago
25-21072
25 days ago
0-309
5 minutes
29243 yoh-tanimoto
author:yoh-tanimoto
feat(Analysis/InnerProductSpace/Projection/Submodule): add `sup_orthogonal` for `ClosedSubmodules` prove that the closed submodule generated by the orthogonal complements of two submodules is the orthogonal complement of the intersection. motivation: needed to define standard subspaces in a Hilbert space #29251 https://ems.press/content/serial-article-files/48171 - [ ] depends on: #29230 for `Lattice` `CompleteLattice` - [ ] depends on: #29241 for the definition of `orthogonal` merge-conflict blocked-by-other-PR 354/1 Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/InnerProductSpace/Projection/Submodule.lean,Mathlib/Topology/Algebra/Module/ClosedSubmodule.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
21-36146
21 days ago
21-36146
21 days ago
0-2553
42 minutes
29251 yoh-tanimoto
author:yoh-tanimoto
feat(Analysis/InnerProductSpace/): define standard subspaces of a complex Hilbert space define standard subspaces of a complex Hilbert space: a standard subspace `S` of `H` is a closed real subspace `S` such that `S ⊓ i S = ⊥` and `S ⊔ i S = ⊤`. prove that the symplectic complement of `S` is again a standard subspace and the double symplectic complement is itself. motivation: one can define a closable operator `x + i y ↦ x - i y` and develop an analogue of the Tomita-Takesaki modular theory for von Neumann algebras. By considering inclusions of standard subspaces, one can obtain unitary representations of various Lie groups. https://ems.press/content/serial-article-files/48171 - [ ] depends on: #29230 for `Lattice` `CompleteLattice` - [ ] depends on: #29241 for the definition of `orthogonal` - [ ] depends on: #29243 for `sup_orthogonal` - [ ] depends on: #29235 for `mapEquiv` merge-conflict blocked-by-other-PR 699/2 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/InnerProductSpace/Projection/Submodule.lean,Mathlib/Analysis/InnerProductSpace/StandardSubspace.lean,Mathlib/Topology/Algebra/Module/ClosedSubmodule.lean 5 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
21-36023
21 days ago
21-36024
21 days ago
0-3098
51 minutes
29282 Jlh18
author:Jlh18
feat(CategoryTheory): HasColimits instance onGrpd Show that the category of groupoids has all small colimits, as a coreflective subcategory of `Cat`, which has all small colimits. The right adjoint of the forgetful functor is the core functor `CategoryTheory.Core.functor`. - [ ] depends on: #29283 [Core of a category as a functor] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict blocked-by-other-PR 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
16-57975
16 days ago
16-57976
16 days ago
0-396
6 minutes
29283 Jlh18
author:Jlh18
feat(CategoryTheory): define forgetful-core adjunction between Cat and Grpd * Define `CategoryTheory.Core.functor`: the functor `Cat ⥤ Grpd` that on objects takes the core of a category * Define `CategoryTheory.Core.adjunction`: the adjunction with the forgetful functor `Grpd.forgetToCat` on the left, and the core functor `Core.functor` on the right. * Hence provide an instance that `Grpd.forgetToCat` is coreflective. - [ ] depends on: #29284 [Extra lemmas in CategoryTheory.Core] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict blocked-by-other-PR 104/4 Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/CategoryTheory/Category/Grpd.lean,Mathlib/CategoryTheory/Core.lean,Mathlib/CategoryTheory/Groupoid/Grpd/Core.lean 5 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
16-57974
16 days ago
16-57974
16 days ago
0-3572
59 minutes
29790 robertmaxton42
author:robertmaxton42
feat (IsCoherentWith) : families of maps from a coherent collection of subspaces lift uniquely to maps from the total space * Adds `IsCoherentWith.liftCover`, which lifts a compatible family of continuous maps from each member of a coherent set of subspaces to a single continuous map on the whole space. * Adds `IsCoherentWith.liftCover'`, which does the same but for a set of coherent subspaces given as the range of a function into `Set X` rather than as an explicit `Set (Set X).` - [ ] depends on: #29788 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 350/3 Mathlib/Data/Set/Subset.lean,Mathlib/Data/Set/UnionLift.lean,Mathlib/Topology/Category/TopCat/Limits/Products.lean,Mathlib/Topology/Coherent.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/Constructions/SumProd.lean,Mathlib/Topology/ContinuousMap/Basic.lean 7 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
15-3616
15 days ago
15-4984
15 days ago
0-4627
1 hour
29151 yuanyi-350
author:yuanyi-350
feat: Corollary of Hahn–Banach theorem In this PR, I have proved [Rudin, *Functional Analysis* (Theorem 3.7)][rudin1991] which is a step in proving the Closed Range Theorem. Also, I have added tags for the corresponding theorems in Rudin to mathlib. 3.7 Theorem. Suppose B is a convex, balanced, closed set in a locally convex space $X, x_0 \in X$, but $x_0 \notin B$. Then there exists $\Lambda \in X^*$ such that $|\Lambda x| \leq 1$ for all $x \in B$, but $\Lambda x_0>1$ proof. Since $B$ is closed and convex, we can apply (b) of Theorem 3.4, with $A=\{ x_0 \}$ , to obtain $\Lambda_1 \in X^*$ such that $\Lambda_1 x_0=r e^{i \theta}$ lies outside the closure $K$ of $\Lambda_1(B)$. Since $B$ is balanced, so is $K$. Hence there exists $s, 0 List.Vector.* - ... Deletions: - Nat.bit1_add_bit1 - ... Any other comments you want to keep out of the PR commit should go below the `---`, and placed outside this HTML comment, or else they will be invisible to reviewers. If this PR depends on other PRs, please list them below this comment, using the following format: - [ ] depends on: #xyz [optional extra text] --> [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import new-contributor awaiting-author blocked-by-other-PR 70/3 Mathlib/Analysis/NormedSpace/HahnBanach/Separation.lean,Mathlib/Analysis/RCLike/Lemmas.lean,Mathlib/Topology/Order/OrderClosed.lean 3 14 ['faenuccio', 'fpvandoorn', 'github-actions', 'mathlib4-dependent-issues-bot', 'mcdoll', 'themathqueen', 'yuanyi-350'] faenuccio
assignee:faenuccio
8-71452
8 days ago
8-71454
8 days ago
21-29486
21 days
29942 smmercuri
author:smmercuri
feat(InfinitePlace/Completion): embeddings of `w.Completion` factor through embeddings of `v.Completion` when `w` extends `v` If `w : v.Extension L` is an extension of `v : InfinitePlace K` to `L`, then `extensionEmbedding w : L →+* ℂ` factors through `extensionEmbedding v : K →+* ℂ`. --- - [ ] depends on: #27978 - [ ] depends on: #29969 - [x] depends on: #29944 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) FLT blocked-by-other-PR 199/58 Mathlib/Analysis/Normed/Field/WithAbs.lean,Mathlib/NumberTheory/NumberField/AdeleRing.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Completion.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Ramification.lean,Mathlib/Topology/MetricSpace/Completion.lean 5 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
8-35587
8 days ago
9-39223
9 days ago
0-1122
18 minutes
29274 Jlh18
author:Jlh18
feat(CategoryTheory): HasLimits instance on Grpd - Show that the quotient of a groupoid is a groupoid in `CategoryTheory.Quotient`. - Define the free groupoid on a category in `CategoryTheory.Category.FreeGroupoid` and hence define the free-forgetful adjunction between `Grpd` and `Cat`. - Use the free-forgetful adjunction to show that `Grpd` has all limits in `CategoryTheory.Category.Grpd.Limit`, as a reflective subcategory of `Cat`. - [ ] depends on: #29250[Renamings in Grpd file] - [ ] depends on: #29278[Quotient of a groupoid is a groupoid] - [ ] depends on: #29279[Free forgetful adjunction] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor blocked-by-other-PR 246/1 Mathlib.lean,Mathlib/CategoryTheory/Category/FreeGroupoid.lean,Mathlib/CategoryTheory/Category/Grpd.lean,Mathlib/CategoryTheory/Groupoid/Grpd/Limit.lean,Mathlib/CategoryTheory/Quotient.lean 5 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-57219
4 days ago
4-57227
4 days ago
0-340
5 minutes
29000 JovanGerb
author:JovanGerb
feat(Tactic/Push): add basic tags and tests This PR adds basic `@[push]` tags, and expands the `push` test file. --- - [ ] depends on: #21965 - [ ] depends on: #30038 - [ ] depends on: #30039 - [ ] depends on: #30042 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 290/196 Archive/Imo/Imo1988Q6.lean,Archive/ZagierTwoSquares.lean,Counterexamples/Phillips.lean,Mathlib/Algebra/Group/Action/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/ListOfFn.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Notation/Pi/Defs.lean,Mathlib/Algebra/Order/Module/HahnEmbedding.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Oscillation.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/Log/PosLog.lean,Mathlib/CategoryTheory/Galois/Basic.lean,Mathlib/Combinatorics/Colex.lean,Mathlib/Combinatorics/Enumerative/InclusionExclusion.lean,Mathlib/Combinatorics/Hall/Finite.lean,Mathlib/Combinatorics/Matroid/Dual.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Data/Analysis/Filter.lean,Mathlib/Data/Finset/BooleanAlgebra.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Finset/Defs.lean,Mathlib/Data/Finset/Empty.lean,Mathlib/Data/Finset/Filter.lean,Mathlib/Data/Finset/Insert.lean,Mathlib/Data/Finset/Lattice/Basic.lean,Mathlib/Data/Finset/Max.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Finset/SDiff.lean,Mathlib/Data/Finset/Sups.lean,Mathlib/Data/Finset/Union.lean,Mathlib/Data/Fintype/Defs.lean,Mathlib/Data/Nat/Cast/Basic.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Nat/PrimeFin.lean,Mathlib/Data/Real/Archimedean.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Data/Set/Prod.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Defs.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/RootSystem/Base.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Order.lean,Mathlib/MeasureTheory/Constructions/Cylinders.lean,Mathlib/MeasureTheory/Constructions/Polish/Basic.lean,Mathlib/MeasureTheory/Covering/Vitali.lean,Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/MeasureTheory/Measure/Typeclasses/Finite.lean,Mathlib/MeasureTheory/SetAlgebra.lean,Mathlib/NumberTheory/AbelSummation.lean,Mathlib/NumberTheory/Divisors.lean,Mathlib/NumberTheory/ModularForms/DedekindEta.lean,Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/Order/CompleteLatticeIntervals.lean,Mathlib/Order/Interval/Finset/Defs.lean,Mathlib/Order/Interval/Set/Defs.lean,Mathlib/Order/LiminfLimsup.lean,Mathlib/Order/PartialSups.lean,Mathlib/Order/SetNotation.lean,Mathlib/Order/UpperLower/Basic.lean,Mathlib/Probability/Moments/ComplexMGF.lean,Mathlib/Probability/ProductMeasure.lean,Mathlib/RingTheory/HahnSeries/Summable.lean,Mathlib/RingTheory/Nilpotent/Defs.lean,Mathlib/Topology/Algebra/ProperAction/ProperlyDiscontinuous.lean,Mathlib/Topology/Bornology/BoundedOperation.lean,Mathlib/Topology/Bornology/Constructions.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/Compactness/Lindelof.lean,Mathlib/Topology/Connected/Clopen.lean,Mathlib/Topology/ContinuousMap/BoundedCompactlySupported.lean,Mathlib/Topology/EMetricSpace/BoundedVariation.lean,Mathlib/Topology/GDelta/MetrizableSpace.lean,Mathlib/Topology/JacobsonSpace.lean,Mathlib/Topology/Order/Compact.lean,Mathlib/Topology/Order/HullKernel.lean,Mathlib/Topology/Perfect.lean,Mathlib/Topology/Sets/CompactOpenCovered.lean,MathlibTest/push.lean 87 6 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-36134
4 days ago
4-36406
4 days ago
4-45292
4 days
29948 mcdoll
author:mcdoll
feat(Analysis/Fourier): The Fourier transform on L^2 --- - [ ] depends on: #29888 - [ ] depends on: #29860 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR 600/118 Mathlib.lean,Mathlib/Analysis/Distribution/FourierSchwartz.lean,Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/Fourier/FourierTransform.lean,Mathlib/Analysis/Fourier/L2Space.lean,Mathlib/Analysis/InnerProductSpace/Extend.lean,Mathlib/Analysis/InnerProductSpace/LinearPMap.lean,Mathlib/Analysis/Normed/Operator/Completeness.lean,Mathlib/Analysis/Normed/Operator/Extend.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean,docs/undergrad.yaml 11 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-19031
4 days ago
4-19032
4 days ago
0-2667
44 minutes
29792 robertmaxton42
author:robertmaxton42
feat (RelCWComplex): a (relative, concrete) CW complex is the colimit of its skeleta Adds: * `RelCWComplex.Subcomplex.isCoherentWith_cover`: a (relative) CW complex is coherent with any collection of subcomplexes that cover. * `RelCWComplex.descBySkeletonLT` and `descBySkeleton`: construct a continuous map from a complex by providing a family of compatible maps from each skeleton and the base. `CWComplex.descBySkeleton` skips the base. - [ ] depends on: #29788 - [ ] depends on: #29790 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 672/31 Mathlib/Data/Set/Subset.lean,Mathlib/Data/Set/UnionLift.lean,Mathlib/Topology/CWComplex/Classical/Basic.lean,Mathlib/Topology/CWComplex/Classical/Finite.lean,Mathlib/Topology/CWComplex/Classical/Subcomplex.lean,Mathlib/Topology/Category/TopCat/Limits/Products.lean,Mathlib/Topology/Coherent.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/Constructions/SumProd.lean,Mathlib/Topology/ContinuousMap/Basic.lean 10 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'scholzhannah'] nobody
3-50226
3 days ago
15-7561
15 days ago
0-1375
22 minutes
29774 Raph-DG
author:Raph-DG
feat(AlgebraicGeometry): Order of vanishing of elements of the function field of locally noetherian, integral schemes In this PR, we define the order of vanishing of elements of the function field of locally noetherian, integral schemes at points of codimension 1. This is essentially just a wrapper around the API for the order of vanishing for rings (i.e. Ring.ord and Ring.ordFrac), but I think it's good to have this too for usability. --- - [ ] depends on: #29550 - [ ] depends on: #26735 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed blocked-by-other-PR 770/4 Mathlib.lean,Mathlib/AlgebraicGeometry/OrderOfVanishing.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/Order/KrullDimension.lean,Mathlib/RingTheory/DiscreteValuationRing/Basic.lean,Mathlib/RingTheory/OrderOfVanishing/Basic.lean,Mathlib/RingTheory/OrderOfVanishing/Properties.lean,Mathlib/Topology/KrullDimension.lean 8 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
3-45153
3 days ago
3-45175
3 days ago
0-1197
19 minutes
29533 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra): maximal Cohen Macaulay module In this PR, we defined the concept of maximal Cohen Macaulay module, and proved that finitely generated maximal Cohen Macaulay module over regular local ring is free. --- - [ ] depends on: #28683 - [ ] depends on: #26218 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 3001/57 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Localization.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/KrullDimension/Module.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/MaximalIdeal/Basic.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/Support.lean 23 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
1-912
1 day ago
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29557 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra): finite projective dimension of regular In this PR, we proved every finitely generated module over regular local ring has finite projective dimension. With this and Auslander Buchsbaum theorem, we can obtain the global dimension of regular local ring is equal to its krull dimension. --- - [ ] depends on: #29533 - [ ] depends on: #26215 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 3572/57 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Localization.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/KrullDimension/Module.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/MaximalIdeal/Basic.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/GlobalDimension.lean,Mathlib/RingTheory/Support.lean 25 n/a ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
1-871
1 day ago
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29534 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra): global dimension of regular local ring In this PR, we proved the global dimension of regular local ring is equal to its krull dimension via Auslander Buchsbaum theorem. --- - [ ] depends on: #29557 - [ ] depends on: #26215 - [ ] depends on: #29558 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 3832/57 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/GlobalDimension.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Localization.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/KrullDimension/Module.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/MaximalIdeal/Basic.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/GlobalDimension.lean,Mathlib/RingTheory/Support.lean 26 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-678
1 day ago
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29703 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra/RingTheory): Hilbert's Syzygy theorem (projective version) In this PR, we proved for field `k`, `MvPolynomial (Fin n) k` has global dimension `n`. --- - [ ] depends on: #29701 - [ ] depends on: #29699 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 4532/57 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/GlobalDimension.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Localization.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/KrullDimension/Module.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/MaximalIdeal/Basic.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/GlobalDimension.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/GlobalDimension.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Polynomial.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Syzygy.lean,Mathlib/RingTheory/Support.lean 30 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-362
1 day ago
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29699 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra/RingTheory) : Global dimension of regular ring In this PR, we proved that the global (homological dimension) of regular ring is equal to its krull dimension. --- - [ ] depends on: #28684 - [ ] depends on: #29670 - [ ] depends on: #29534 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 4285/57 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/GlobalDimension.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Localization.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/KrullDimension/Module.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/MaximalIdeal/Basic.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/GlobalDimension.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/GlobalDimension.lean,Mathlib/RingTheory/Support.lean 28 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-85900
23 hours ago
unknown
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29796 Thmoas-Guan
author:Thmoas-Guan
feat(RingTheory) : regular of finite global dimension In this PR, we proved the other half of Auslander-Buchsbaum-Serre criterion, which states that a local ring is regular if it has finite global dimension, with results in #29557, we can obtain the full theorem. More APIs would be developed based on the two. --- - [ ] depends on: #26215 - [ ] depends on: #26217 - [ ] depends on: #29558 - [ ] depends on: #28683 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 3009/22 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/RingTheory/GlobalDimension.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Regular/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/RegularLocalRing/AuslanderBuchsbaumSerre.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean 16 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-85724
23 hours ago
unknown
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29802 Thmoas-Guan
author:Thmoas-Guan
feat(Algebra/RingTheory) : Auslander–Buchsbaum–Serre criterion and its corollaries In this PR, we proved that: 1: The full version of Auslander–Buchsbaum–Serre criterion 2: Localization of regular local ring is regular 3: Global dimension finite implies regular (doesn't need local) 4: Regular ring only need to be verified at maximal ideals. --- - [ ] depends on: #29534 - [ ] depends on: #29699 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 5085/57 Mathlib.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/GlobalDimension.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Localization.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/KrullDimension/Module.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/MaximalIdeal/Basic.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/RegularLocalRing/AuslanderBuchsbaumSerre.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/GlobalDimension.lean,Mathlib/RingTheory/RegularLocalRing/Localization.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/GlobalDimension.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Localization.lean,Mathlib/RingTheory/Support.lean 31 n/a ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-85702
23 hours ago
unknown
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