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Pull requests: leanprover-community/mathlib4
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chore(CategoryTheory/Comma): more implicit_reducible definitions
t-category-theory
Category theory
#42762
opened Aug 14, 2026 by
joelriou
Contributor
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feat(CategoryTheory/Presentable): lemmas about sharply smaller regular cardinals
t-category-theory
Category theory
t-set-theory
Set theory
#42761
opened Aug 14, 2026 by
joelriou
Contributor
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feat(Analysis/SpecialFunction): bessel function of the first kind
t-analysis
Analysis (normed *, calculus)
#42760
opened Aug 14, 2026 by
wwylele
Collaborator
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feat(CategoryTheory/Subobject): extend image subobject API
blocked-by-other-PR
This PR depends on another PR (this label is automatically managed by a bot)
t-category-theory
Category theory
#42759
opened Aug 14, 2026 by
mckoen
Collaborator
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1 task
feat(ModelTheory): add syntax and semantics for infinitary logic
LLM-generated
PRs with substantial input from LLMs - review accordingly
new-contributor
This PR was made by a contributor with at most 5 merged PRs. Welcome to the community!
t-logic
Logic (model theory, etc)
#42758
opened Aug 14, 2026 by
cameronfreer
Contributor
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feat(CategoryTheory/Subobject): extend exists and pullback API
t-category-theory
Category theory
#42757
opened Aug 14, 2026 by
mckoen
Collaborator
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chore: get cache
large-import
Automatically added label for PRs with a significant increase in transitive imports
feat(GroupTheory/SpecificGroups/Cyclic): comparison and index of subgroups generated by powers
t-group-theory
Group theory
#42754
opened Aug 14, 2026 by
xroblot
Collaborator
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refactor: redefine The PR has a merge conflict with master, and needs manual merging. (this label is managed by a bot)
t-analysis
Analysis (normed *, calculus)
spectralRadius in terms of quasispectrum
merge-conflict
#42753
opened Aug 13, 2026 by
j-loreaux
Contributor
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fix(Cache): give each cache process its own temporary file names
CI
Modifies the continuous integration setup or other automation
#42752
opened Aug 13, 2026 by
kim-em
Contributor
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chore(Algebra/QuadraticAlgebra): rename map/mapEquiv to changeGenerator
t-algebra
Algebra (groups, rings, fields, etc)
#42751
opened Aug 13, 2026 by
xroblot
Collaborator
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feat(Topology): generalise IsometricSmul to This PR depends on another PR (this label is automatically managed by a bot)
LLM-generated
PRs with substantial input from LLMs - review accordingly
WeakPseudoEMetricSpace and friends
blocked-by-other-PR
#42750
opened Aug 13, 2026 by
felixpernegger
Contributor
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1 task
feat(RingTheory/Bialgebra): expose (Add)MonoidAlgebra.liftMulEquiv
t-ring-theory
Ring theory
#42749
opened Aug 13, 2026 by
kim-em
Contributor
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chore(LinearAlgebra): tidy markdown headers
t-algebra
Algebra (groups, rings, fields, etc)
#42748
opened Aug 13, 2026 by
harahu
Contributor
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feat(Topology): generalise Dilation to This PR depends on another PR (this label is automatically managed by a bot)
LLM-generated
PRs with substantial input from LLMs - review accordingly
WeakPseudoEMetricSpace and friends
blocked-by-other-PR
#42747
opened Aug 13, 2026 by
felixpernegger
Contributor
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1 task
chore: remove outdated adaptation notes after #42161
t-category-theory
Category theory
tech debt
Tracking cross-cutting technical debt, see e.g. the "Technical debt counters" stream on zulip
#42745
opened Aug 13, 2026 by
JovanGerb
Contributor
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feat(Analysis/InnerProductSpace): complexification of Hilbert spaces
t-analysis
Analysis (normed *, calculus)
tech debt
Tracking cross-cutting technical debt, see e.g. the "Technical debt counters" stream on zulip
#42744
opened Aug 13, 2026 by
themathqueen
Collaborator
•
Draft
chore(Tactic): mark two runtime-only imports as This pull request has been delegated to the PR author (or occasionally another non-maintainer).
LLM-generated
PRs with substantial input from LLMs - review accordingly
t-meta
Tactics, attributes or user commands
shake: keep
delegated
#42743
opened Aug 13, 2026 by
bryangingechen
Contributor
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feat: the set of Fredholm operators between two Banach spaces is open
blocked-by-other-PR
This PR depends on another PR (this label is automatically managed by a bot)
t-topology
Topological spaces, uniform spaces, metric spaces, filters
#42742
opened Aug 13, 2026 by
ADedecker
Member
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1 task
feat(Topology): generalise Isometry to PRs with substantial input from LLMs - review accordingly
t-topology
Topological spaces, uniform spaces, metric spaces, filters
WeakPseudoEMetricSpace and friends
LLM-generated
#42741
opened Aug 13, 2026 by
felixpernegger
Contributor
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1 task
chore: mark Algebraic geometry
tech debt
Tracking cross-cutting technical debt, see e.g. the "Technical debt counters" stream on zulip
AlgebraicGeometry.PrimeSpectrum.Top as implicit_reducible
t-algebraic-geometry
#42740
opened Aug 13, 2026 by
JovanGerb
Contributor
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chore(Order/Interval): define Tracking cross-cutting technical debt, see e.g. the "Technical debt counters" stream on zulip
Unique (Iic 0) directly, drop a defeq option in Traj
tech debt
#42739
opened Aug 13, 2026 by
FrankieNC
Collaborator
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chore(Data/Finset): mark Measure theory / Probability theory
tech debt
Tracking cross-cutting technical debt, see e.g. the "Technical debt counters" stream on zulip
Equiv.restrictPreimageFinset implicit_reducible
t-measure-probability
#42738
opened Aug 13, 2026 by
FrankieNC
Collaborator
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feat(Algebra/Order/Kleene): add Kleene algebra instances for MulOppos…
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)
#42737
opened Aug 13, 2026 by
Jack1320
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