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Pull requests: leanprover-community/mathlib4
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doc: add theorem 8 (straightedge-and-compass construction) to 100.yaml
#41757
opened Jul 14, 2026 by
wwylele
Collaborator
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perf(LinearAlgebra/RootSystem/GeckConstruction/Semisimple):replace generic search with a more exp proof
new-contributor
This PR was made by a contributor with at most 5 merged PRs. Welcome to the community!
#41756
opened Jul 14, 2026 by
FawadHa1der
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feat(RingTheory/KrullAkizuki): add the Krull-Akizuki theorem
new-contributor
This PR was made by a contributor with at most 5 merged PRs. Welcome to the community!
t-ring-theory
Ring theory
#41755
opened Jul 14, 2026 by
Yangdx02
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feat(GroupTheory/GroupAction/DomAct): invariant functions are constant on orbits
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-group-theory
Group theory
#41754
opened Jul 14, 2026 by
SNAPKITTYWEST
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1 of 2 tasks
perf(Algebra/Category/ModuleCat/Presheaf): speed up the monoidal pushforward instance
LLM-generated
PRs with substantial input from LLMs - review accordingly
t-algebra
Algebra (groups, rings, fields, etc)
tech debt
Tracking cross-cutting technical debt, see e.g. the "Technical debt counters" stream on zulip
#41753
opened Jul 14, 2026 by
kbuzzard
Member
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feat(GroupTheory): extend DomMulAct API with core lemmas
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-group-theory
Group theory
#41751
opened Jul 14, 2026 by
SNAPKITTYWEST
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feat(CategoryTheory/MorphismProperty): trivial bundles
t-category-theory
Category theory
tech debt
Tracking cross-cutting technical debt, see e.g. the "Technical debt counters" stream on zulip
#41750
opened Jul 14, 2026 by
joelriou
Contributor
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feat(Counterexamples): a finite free group scheme of order four not killed by four
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!
#41748
opened Jul 14, 2026 by
j2d9w5xtjn-png
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chore(NumberTheory/NumberField/InfinitePlace/Basic): add abbrev of This PR does not pass CI yet. This label is automatically removed once it does.
delegated
This pull request has been delegated to the PR author (or occasionally another non-maintainer).
t-algebra
Algebra (groups, rings, fields, etc)
t-number-theory
Number theory (also use t-algebra or t-analysis to specialize)
LiesOver for InfinitePlace
awaiting-CI
#41747
opened Jul 14, 2026 by
tb65536
Contributor
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chore(RingTheory/IntegralClosure/Algebra/Basic): generalize Please do not add manually. Requests for a bot to merge automatically once CI is done.
awaiting-requeue
This PR was on the bors queue but came off after a build failure or other issue.
t-algebra
Algebra (groups, rings, fields, etc)
t-ring-theory
Ring theory
isIntegral_natCast and isIntegral_intCast
auto-merge-after-CI
#41746
opened Jul 14, 2026 by
tb65536
Contributor
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feat(AlgebraicGeometry/Proetale): generalize Algebraic geometry
ellAdicSheaf to general topological sheaf
t-algebraic-geometry
#41745
opened Jul 14, 2026 by
jjdishere
Collaborator
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feat(AlgebraicTopology): proper model categories
t-algebraic-topology
Algebraic topology
#41744
opened Jul 14, 2026 by
joelriou
Contributor
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chore: move Topological spaces, uniform spaces, metric spaces, filters
ContinuousLinearMap.extend from Analysis to Topology
t-topology
#41743
opened Jul 14, 2026 by
themathqueen
Collaborator
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feat(Data/ZMod): add This PR was made by a contributor with at most 5 merged PRs. Welcome to the community!
t-data
Data (lists, quotients, numbers, etc)
Unique (ZMod 2)ˣ instance
new-contributor
#41742
opened Jul 14, 2026 by
giuseppesorge
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chore(Algebra/*/NonUnital*): split nonassoc and assoc nonunital Algebra (groups, rings, fields, etc)
t-ring-theory
Ring theory
tech debt
Tracking cross-cutting technical debt, see e.g. the "Technical debt counters" stream on zulip
center instances
t-algebra
#41741
opened Jul 14, 2026 by
pechersky
Contributor
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chore(Topology/Algebra/LinearMapCompletion): generalize Topological spaces, uniform spaces, metric spaces, filters
UniformSpace.Completion.toComplL
t-topology
#41740
opened Jul 14, 2026 by
themathqueen
Collaborator
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feat(CategoryTheory/AB5): AB5 instance of Ab with universe variables
t-algebra
Algebra (groups, rings, fields, etc)
#41737
opened Jul 14, 2026 by
jjdishere
Collaborator
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feat: generalize SMul instances from DistribMulAction to DistribSMul
t-analysis
Analysis (normed *, calculus)
#41736
opened Jul 14, 2026 by
pechersky
Contributor
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feat(AlgebraicTopology): homotopy cartesian squares
blocked-by-other-PR
This PR depends on another PR (this label is automatically managed by a bot)
t-algebraic-topology
Algebraic topology
WIP
Work in progress
#41735
opened Jul 14, 2026 by
joelriou
Contributor
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1 task
feat(DiscreteConvolution): add ring convolution definitions and properties
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
#41734
opened Jul 14, 2026 by
IlPreteRosso
Contributor
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feat: versions for LocallyIntegrable of LocallyIntegrableOn and mul/smul lemmas
easy
< 20s of review time. See the lifecycle page for guidelines.
t-analysis
Analysis (normed *, calculus)
t-measure-probability
Measure theory / Probability theory
#41733
opened Jul 14, 2026 by
luigi-massacci
Collaborator
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feat(RingTheory/ClassGroup): add mulEquiv_mk0
new-contributor
This PR was made by a contributor with at most 5 merged PRs. Welcome to the community!
t-ring-theory
Ring theory
#41732
opened Jul 14, 2026 by
vaca22
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feat(Topology/Algebra/Module/Spaces/ContinuousLinearMap): convert A reviewer has asked the author a question or requested changes.
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
toLinearMap₁₂ to a linear map
awaiting-author
#41731
opened Jul 14, 2026 by
mpacholski
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feat(AlgebraicGeometry/Sites/Proetale): inclusion from small etale site to proetale site
t-algebraic-geometry
Algebraic geometry
#41730
opened Jul 14, 2026 by
jjdishere
Collaborator
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