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Pull requests: leanprover-community/mathlib4

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refactor(Mathlib/Data/Set): split up Lattice.lean file-removed A Lean module was (re)moved without a `deprecated_module` annotation tech debt Tracking cross-cutting technical debt, see e.g. the "Technical debt counters" stream on zulip
#43030 opened Aug 21, 2026 by loefflerd Contributor Loading…
chore(RingTheory): tidy markdown headers t-ring-theory Ring theory
#43029 opened Aug 21, 2026 by harahu Contributor Loading…
feat(Analysis/CStarAlgebra): @[congr] lemmas for cfc t-analysis Analysis (normed *, calculus)
#43028 opened Aug 21, 2026 by j-loreaux Contributor Loading…
chore: topologicalGroup -> isTopologicalGroup in names
#43027 opened Aug 21, 2026 by ADedecker Member Loading…
chore(IsTopologicalBasis): review naming t-topology Topological spaces, uniform spaces, metric spaces, filters
#43026 opened Aug 21, 2026 by ADedecker Member Loading…
feat(Analysis/CStarAlgebra): grind patterns for cfc junk values t-analysis Analysis (normed *, calculus)
#43025 opened Aug 21, 2026 by j-loreaux Contributor Loading…
feat: isMulCommutative_mono for subobjects easy < 20s of review time. See the lifecycle page for guidelines. t-algebra Algebra (groups, rings, fields, etc)
#43024 opened Aug 21, 2026 by j-loreaux Contributor Loading…
feat(Order/RelSeries): change FiniteDimensional to allow empty types t-order Order theory
#43023 opened Aug 21, 2026 by SnirBroshi Collaborator Loading…
refactor(MeasureTheory/Integral): split SetToL1.lean t-measure-probability Measure theory / Probability theory tech debt Tracking cross-cutting technical debt, see e.g. the "Technical debt counters" stream on zulip
#43021 opened Aug 21, 2026 by loefflerd Contributor Loading…
feat(Geometry/Manifold): add induced covariant derivative for Hom-bundles 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! t-differential-geometry Manifolds etc
#43020 opened Aug 21, 2026 by mpacholski Contributor Loading…
1 task
refactor(Analysis/Normed/Unbundled/SpectralNorm): extract, generalize, and golf algNormFromConst t-analysis Analysis (normed *, calculus)
#43019 opened Aug 21, 2026 by tb65536 Contributor Loading…
1 task done
feat(Combinatorics): define network flows t-combinatorics Combinatorics WIP Work in progress
#43017 opened Aug 21, 2026 by felixpernegger Contributor Loading…
feat(Analysis/Matrix/Normed): norm of block diagonal matrix t-analysis Analysis (normed *, calculus)
#43016 opened Aug 21, 2026 by tb65536 Contributor Loading…
refactor(CategoryTheory/Sites): split long file Sieves.lean t-category-theory Category theory tech debt Tracking cross-cutting technical debt, see e.g. the "Technical debt counters" stream on zulip
#43014 opened Aug 21, 2026 by loefflerd Contributor Loading…
feat: diffeomorphisms are smooth embeddings t-differential-geometry Manifolds etc
#43013 opened Aug 21, 2026 by grunweg Contributor Loading…
chore(RingTheory/Valuation): remove all set_options in RingTheory/Valuation tech debt Tracking cross-cutting technical debt, see e.g. the "Technical debt counters" stream on zulip
#43011 opened Aug 21, 2026 by Whysoserioushah Collaborator Loading…
refactor(Topology/Algebra/Group): split long file Basic.lean t-topology Topological spaces, uniform spaces, metric spaces, filters tech debt Tracking cross-cutting technical debt, see e.g. the "Technical debt counters" stream on zulip
#43010 opened Aug 21, 2026 by loefflerd Contributor Loading…
refactor(CategoryTheory): use quadrifunctors for the localized pentagon blocked-by-other-PR This PR depends on another PR (this label is automatically managed by a bot) LLM-generated PRs with substantial input from LLMs - review accordingly t-category-theory Category theory tech debt Tracking cross-cutting technical debt, see e.g. the "Technical debt counters" stream on zulip WIP Work in progress
#43009 opened Aug 21, 2026 by dagurtomas Contributor Loading…
2 tasks
feat(CategoryTheory): express monoidal pentagons using quadrifunctors blocked-by-other-PR This PR depends on another PR (this label is automatically managed by a bot) LLM-generated PRs with substantial input from LLMs - review accordingly t-category-theory Category theory WIP Work in progress
#43008 opened Aug 21, 2026 by dagurtomas Contributor Loading…
1 task
feat(CategoryTheory): localize quadrifunctors blocked-by-other-PR This PR depends on another PR (this label is automatically managed by a bot) LLM-generated PRs with substantial input from LLMs - review accordingly t-category-theory Category theory WIP Work in progress
#43007 opened Aug 21, 2026 by dagurtomas Contributor Loading…
1 task
feat(CategoryTheory): add functor API for quadrifunctors LLM-generated PRs with substantial input from LLMs - review accordingly t-category-theory Category theory WIP Work in progress
#43006 opened Aug 21, 2026 by dagurtomas Contributor Loading…
chore(Logic/Equiv): swap the names of Equiv.setCongr and Equiv.Set.congr t-data Data (lists, quotients, numbers, etc)
#43005 opened Aug 21, 2026 by YaelDillies Contributor Loading…
ProTip! Updated in the last three days: updated:>2026-08-18.