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Pull requests: leanprover-community/mathlib4

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chore(FieldTheory/AbelRuffini): simpler definition of solvableByRad t-algebra Algebra (groups, rings, fields, etc)
#35908 opened Mar 1, 2026 by vihdzp Loading…
fix(Topology/Defs/Basic): preserve noncanonical topology instances in delaboration new-contributor This PR was made by a contributor with at most 5 merged PRs. Welcome to the community! t-topology Topological spaces, uniform spaces, metric spaces, filters
#35907 opened Mar 1, 2026 by JJYYY-JJY Loading…
feat(Combinatorics/SimpleGraph/Walks): add Walk.IsChord and Walk.IsChordless new-contributor This PR was made by a contributor with at most 5 merged PRs. Welcome to the community! t-combinatorics Combinatorics
#35906 opened Mar 1, 2026 by scp020 Draft
feat(CategoryTheory/Sites): the maximal 1-hypercover containing a 0-hypercover blocked-by-other-PR This PR depends on another PR (this label is automatically managed by a bot) t-category-theory Category theory
#35904 opened Mar 1, 2026 by chrisflav Loading…
1 task
chore: make CompleteLattice helpers instance reducible new-contributor This PR was made by a contributor with at most 5 merged PRs. Welcome to the community! t-order Order theory
#35903 opened Mar 1, 2026 by matthewjasper Loading…
chore: Fix non-defeq diamonds on OrderDual new-contributor This PR was made by a contributor with at most 5 merged PRs. Welcome to the community!
#35900 opened Feb 28, 2026 by matthewjasper Loading…
feat(Analysis): extremePoints 𝕜 (closedBall 0 1) ⊆ sphere 0 1 t-analysis Analysis (normed *, calculus)
#35899 opened Feb 28, 2026 by themathqueen Loading…
feat(Algebra/Star/StarProjection): add IsStarProjection.map easy < 20s of review time. See the lifecycle page for guidelines. t-algebra Algebra (groups, rings, fields, etc)
#35898 opened Feb 28, 2026 by themathqueen Loading…
feat(Algebra/Ring/Subring): the equivalence between two equal subrings maintainer-merge A reviewer has approved the changed; awaiting maintainer approval. t-algebra Algebra (groups, rings, fields, etc)
#35897 opened Feb 28, 2026 by joelriou Loading…
chore(misc): fix typos
#35896 opened Feb 28, 2026 by harahu Loading…
feat(Data/Nat/Choose/Lucas): add choose_mul_mul and choose_pow_mul_pow_mul modular congruence lemmas t-data Data (lists, quotients, numbers, etc)
#35893 opened Feb 28, 2026 by b-mehta Loading…
feat(Data): lemmas for List.bagInter t-data Data (lists, quotients, numbers, etc)
#35892 opened Feb 28, 2026 by vlad902 Loading…
chore: move differential geometry elaborators tests into a separate d… easy < 20s of review time. See the lifecycle page for guidelines. file-removed A Lean module was (re)moved without a `deprecated_module` annotation
#35891 opened Feb 28, 2026 by grunweg Loading…
chore: delete deprecated module Topology/PartialHomeomorph easy < 20s of review time. See the lifecycle page for guidelines. t-topology Topological spaces, uniform spaces, metric spaces, filters
#35890 opened Feb 28, 2026 by grunweg Loading…
test: set proj := .no in RefinedDiscrTree t-meta Tactics, attributes or user commands
#35889 opened Feb 28, 2026 by JovanGerb Draft
chore(LinearAlgebra): reduce defeq abuse of Set α = α → Prop t-algebra Algebra (groups, rings, fields, etc)
#35888 opened Feb 28, 2026 by urkud Loading…
chore(CategoryTheory): reduce defeq abuse about Sets
#35885 opened Feb 28, 2026 by urkud Loading…
chore: fix induction and recursor names tech debt Tracking cross-cutting technical debt, see e.g. the "Technical debt counters" stream on zulip
#35884 opened Feb 28, 2026 by Parcly-Taxel Loading…
chore(RingTheory/Adjoin/Polynomial): move to Basic.lean delegated This pull request has been delegated to the PR author (or occasionally another non-maintainer). file-removed A Lean module was (re)moved without a `deprecated_module` annotation t-algebra Algebra (groups, rings, fields, etc)
#35883 opened Feb 28, 2026 by xgenereux Loading…
feat(Algebra/ModuleCat): API on short complex in ModuleCat t-algebra Algebra (groups, rings, fields, etc)
#35882 opened Feb 28, 2026 by Thmoas-Guan Loading…
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