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Pull requests: leanprover-community/mathlib4
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chore(Data/Set/Lattice): Order theory
Sort* polymorphism
t-order
#41304
opened Jul 2, 2026 by
plp127
Contributor
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1 task
chore(Topology/Algebra/Valued/WithVal): clean up instances
t-topology
Topological spaces, uniform spaces, metric spaces, filters
#41302
opened Jul 2, 2026 by
JovanGerb
Contributor
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feat(CategoryTheory): (co)kernels in functor categories/homological complexes
t-category-theory
Category theory
#41301
opened Jul 2, 2026 by
joelriou
Contributor
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feat(EllipticCurve): the universal elliptic curve
t-algebra
Algebra (groups, rings, fields, etc)
t-algebraic-geometry
Algebraic geometry
#41300
opened Jul 2, 2026 by
alreadydone
Contributor
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chore(DomAct): clean up Automatically added label for PRs with a significant increase in transitive imports
t-group-theory
Group theory
DomMulAct/DomAddAct instances
large-import
#41299
opened Jul 2, 2026 by
JovanGerb
Contributor
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chore: fix Algebra (groups, rings, fields, etc)
Additive/Multiplicative order instances
t-algebra
#41298
opened Jul 2, 2026 by
JovanGerb
Contributor
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feat: cardinality of Order theory
Ultrafilter
t-order
#41297
opened Jul 2, 2026 by
plp127
Contributor
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chore(CategoryTheory/Adjunction/Basic): This PR is currently being built by bors on the staging branch.
ready-to-merge
This PR has been sent to bors.
t-category-theory
Category theory
to_dual for Adjunction.comp
bors-staging
#41296
opened Jul 2, 2026 by
JovanGerb
Contributor
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feat(CategoryTheory/Preadditive/FreydCategory/RightFreyd): the right Freyd category has cokernels
blocked-by-other-PR
This PR depends on another PR (this label is automatically managed by a bot)
t-category-theory
Category theory
#41295
opened Jul 2, 2026 by
smorel394
Collaborator
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2 tasks
feat(CategoryTheory/Preadditive/FreydCategory/RightFreyd): right Freyd category of a preadditive category
blocked-by-other-PR
This PR depends on another PR (this label is automatically managed by a bot)
t-category-theory
Category theory
#41294
opened Jul 2, 2026 by
smorel394
Collaborator
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1 task
feat: add WeierstrassCurve.exists_variableChange_lift
t-algebraic-geometry
Algebraic geometry
#41293
opened Jul 2, 2026 by
riccardobrasca
Member
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feat(Category/Preadditive/FreydCategory/Homotopy): homotopies on the category of arrows
ready-to-merge
This PR has been sent to bors.
t-category-theory
Category theory
#41292
opened Jul 2, 2026 by
smorel394
Collaborator
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refactor(RingTheory/IntegralClosure/IsIntegral/Basic): use Algebra (groups, rings, fields, etc)
t-ring-theory
Ring theory
FaithfulSMul in isIntegral_algebraMap_iff
t-algebra
#41291
opened Jul 2, 2026 by
tb65536
Contributor
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feat: implement LMFDB attribute
t-meta
Tactics, attributes or user commands
#41290
opened Jul 2, 2026 by
Paul-Lez
Collaborator
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feat(EReal): add_eq_top_iff_eq_top_*
t-data
Data (lists, quotients, numbers, etc)
#41288
opened Jul 2, 2026 by
lua-vr
Contributor
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feat(EReal): addition of real as an orderIso
t-topology
Topological spaces, uniform spaces, metric spaces, filters
#41286
opened Jul 2, 2026 by
lua-vr
Contributor
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feat(AlgebraicTopology/SimplicialSet): relative homology
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
#41285
opened Jul 2, 2026 by
joelriou
Contributor
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2 tasks
feat(Tactic/ComputablePolynomial): computable multivariate polynomials and mv_decide
t-meta
Tactics, attributes or user commands
#41283
opened Jul 2, 2026 by
mkaratarakis
Contributor
•
Draft
feat(Tactic/ComputablePolynomial): computable univariate polynomials and poly_decide
t-meta
Tactics, attributes or user commands
#41282
opened Jul 2, 2026 by
mkaratarakis
Contributor
•
Draft
doc(NumberTheory/ModularForms): remove a TODO which is done
easy
< 20s of review time. See the lifecycle page for guidelines.
t-number-theory
Number theory (also use t-algebra or t-analysis to specialize)
#41281
opened Jul 2, 2026 by
loefflerd
Contributor
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feat(Geometry/Manifold): C^n smoothness of the inverse of a bundle trivialization
t-differential-geometry
Manifolds etc
#41280
opened Jul 2, 2026 by
Deicyde
Contributor
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feat(NumberTheory): the identity of the abstract Hecke ring
blocked-by-other-PR
This PR depends on another PR (this label is automatically managed by a bot)
t-number-theory
Number theory (also use t-algebra or t-analysis to specialize)
feat(NumberTheory): the convolution product on abstract Hecke rings
blocked-by-other-PR
This PR depends on another PR (this label is automatically managed by a bot)
t-group-theory
Group theory
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