Skip to content

Pull requests: leanprover-community/mathlib4

New pull request New
2,397 Open 35,375 Closed
2,397 Open 35,375 Closed
Author
Filter by author
Loading
Label
Filter by label
Loading
Use alt + click/return to exclude labels
or ⇧ + click/return for logical OR
Projects
Filter by project
Loading
Milestones
Filter by milestone
Loading
Reviews
Filter by reviews
No reviews Review required Approved review Changes requested
Assignee
Filter by who’s assigned
Assigned to nobody Loading
Sort
Sort by
Newest Oldest Most commented Least commented Recently updated Least recently updated Best match
Most reactions
👍 👎 😄 🎉 😕 ❤️ 🚀 👀

Pull requests list

feat(Data/Set): add Set.diag API
#38380 opened Apr 22, 2026 by linesthatinterlace Collaborator Loading…
1
feat: missing lemmas for ContT.run easy < 20s of review time. See the lifecycle page for guidelines. t-data Data (lists, quotients, numbers, etc) t-meta Tactics, attributes or user commands
#38379 opened Apr 22, 2026 by eric-wieser Member Loading…
4
refactor(CategoryTheory/Limits): redefine IsIPC in terms of IsIPCOfShape blocked-by-other-PR This PR depends on another PR (this label is automatically managed by a bot) t-category-theory Category theory
#38378 opened Apr 22, 2026 by chrisflav Member Loading…
1 task
2
feat(RingTheory/Localization, FieldTheory/Galois): refactor fraction field action API and add fixingSubgroup lemmas
#38377 opened Apr 22, 2026 by xroblot Collaborator Loading…
@riccardobrasca
1
draft: semialghom WIP Work in progress
#38376 opened Apr 22, 2026 by smmercuri Collaborator Loading…
2
feat(MvPowerSeries): some lemmas truncTotal of subst t-ring-theory Ring theory
#38375 opened Apr 22, 2026 by WenrongZou Contributor Loading…
1
Fundamental Vector Fields are Vertical new-contributor This PR was made by a contributor with at most 5 merged PRs. Welcome to the community! t-differential-geometry Manifolds etc
#38374 opened Apr 22, 2026 by idontgetoutmuch Collaborator • Draft
2
feat (Algebra/FreeAbelianGroup /Finsupp) : The support of non zero element in a freeabeliangroup is non empty new-contributor This PR was made by a contributor with at most 5 merged PRs. Welcome to the community! t-algebra Algebra (groups, rings, fields, etc)
#38373 opened Apr 22, 2026 by Nicola9Falciola Loading…
3
feat(Order): add eq_of_sdiff_right_eq, rename eq_of_sdiff_eq_sdiff new-contributor This PR was made by a contributor with at most 5 merged PRs. Welcome to the community! t-order Order theory
#38371 opened Apr 22, 2026 by MaltyBlanket Loading…
2
feat(Data.Finset.Powerset): add powerset_filter_sdiff and powersetCard_filter_sdiff new-contributor This PR was made by a contributor with at most 5 merged PRs. Welcome to the community! t-data Data (lists, quotients, numbers, etc)
#38370 opened Apr 22, 2026 by FordUniver Collaborator Loading…
14
feat(AlgebraicTopology): Eilenberg steenrod axioms blocked-by-other-PR This PR depends on another PR (this label is automatically managed by a bot) new-contributor This PR was made by a contributor with at most 5 merged PRs. Welcome to the community!
#38369 opened Apr 22, 2026 by quantumsnow Contributor Loading…
1 task
3
chore(CategoryTheory/Limits): make Pi.mapIso a def t-category-theory Category theory
#38368 opened Apr 22, 2026 by chrisflav Member Loading…
3
feat(AlgebraicTopology/SimplicialSet): morphisms from horns t-algebraic-topology Algebraic topology
#38367 opened Apr 22, 2026 by joelriou Contributor Loading…
1
feat(CategoryTheory/Monoidal): definition of ring objects t-category-theory Category theory
#38366 opened Apr 22, 2026 by joelriou Contributor Loading…
1
feat: #Ordinal = univ easy < 20s of review time. See the lifecycle page for guidelines. t-set-theory Set theory
#38365 opened Apr 22, 2026 by vihdzp Collaborator Loading…
1
feat: create Order/DirectedCompletePartialOrder/Defs.lean new-contributor This PR was made by a contributor with at most 5 merged PRs. Welcome to the community! t-order Order theory
#38364 opened Apr 22, 2026 by openendings Loading…
2
chore: split SetTheory.Cardinal.Cofinality file-removed A Lean module was (re)moved without a `deprecated_module` annotation
#38363 opened Apr 22, 2026 by vihdzp Collaborator Loading…
1
feat: cofinal subset of regular cardinal is isomorphic to it blocked-by-other-PR This PR depends on another PR (this label is automatically managed by a bot) file-removed A Lean module was (re)moved without a `deprecated_module` annotation
#38362 opened Apr 22, 2026 by vihdzp Collaborator Loading…
1 task
2
chore(Tactic/Zify): remove lemmas t-meta Tactics, attributes or user commands
#38361 opened Apr 22, 2026 by mcdoll Member Loading…
1
feat(AlagebraicTopology/SimplexCategory): iterations of δ 0 and σ 0 t-algebraic-topology Algebraic topology
#38360 opened Apr 22, 2026 by joelriou Contributor Loading…
2
feat: custom simp sets for translating between Equiv and algebraic notation t-algebra Algebra (groups, rings, fields, etc) t-meta Tactics, attributes or user commands
#38359 opened Apr 22, 2026 by mcdoll Member • Draft
1
doc(1000.yaml): note more formalised theorems awaiting-author A reviewer has asked the author a question or requested changes. documentation Improvements or additions to documentation
#38358 opened Apr 22, 2026 by yuanyi-350 Collaborator Loading…
4
feat(Combinatorics/SimpleGraph/Coloring/Greedy): Greedy coloring blocked-by-other-PR This PR depends on another PR (this label is automatically managed by a bot) large-import Automatically added label for PRs with a significant increase in transitive imports t-combinatorics Combinatorics
#38357 opened Apr 22, 2026 by SnirBroshi Collaborator Loading…
4 tasks
2
feat(Order/ConditionallyCompleteLattice/Finset): sSup s ≠ ⊤ in a CompleteLinearOrder for a finite set without ⊤ t-order Order theory
#38356 opened Apr 22, 2026 by SnirBroshi Collaborator Loading…
1
feat(Combinatorics/SimpleGraph/Copy): maxDegree is monotonic, and minDegree is monotonic over a surjective Copy t-combinatorics Combinatorics
#38355 opened Apr 22, 2026 by SnirBroshi Collaborator Loading…
2
ProTip! Adding no:label will show everything without a label.