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Pull requests: leanprover-community/mathlib4
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chore: update Archive, Counterexamples, docs to module format
#35791
opened Feb 26, 2026 by
kim-em
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feat(CategoryTheory/Algebra): Flasque Sheaves have vanishing cohomology
blocked-by-other-PR
This PR depends on another PR (this label is automatically managed by a bot)
large-import
Automatically added label for PRs with a significant increase in transitive imports
new-contributor
This PR was made by a contributor with at most 5 merged PRs. Welcome to the community!
WIP
Work in progress
#35790
opened Feb 26, 2026 by
Brian-Nugent
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3 tasks
feat(RingTheory): add some easy lemmas
new-contributor
This PR was made by a contributor with at most 5 merged PRs. Welcome to the community!
t-ring-theory
Ring theory
#35789
opened Feb 26, 2026 by
BryceT233
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feat(Analysis/SchwartzSpace): post composition with continuous linear map
t-analysis
Analysis (normed *, calculus)
#35787
opened Feb 25, 2026 by
mcdoll
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feat(Order): Add simp lemma for Order theory
IsRelUpperSet and IsRelLowerSet
t-order
#35786
opened Feb 25, 2026 by
DavidLedvinka
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feat(CategoryTheory/Topology): Add Flasque Sheaves
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!
#35785
opened Feb 25, 2026 by
Brian-Nugent
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1 task
feat(MeasureTheory): Add Measure theory / Probability theory
MeasurableSingletonClass version of Measure.map_dirac
t-measure-probability
#35784
opened Feb 25, 2026 by
DavidLedvinka
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refactor(Combinatorics): move This PR depends on another PR (this label is automatically managed by a bot)
t-combinatorics
Combinatorics
WIP
Work in progress
Dart from SimpleGraph to HasAdj
blocked-by-other-PR
#35783
opened Feb 25, 2026 by
IvanRenison
•
Draft
1 task
feat(MeasureTheory): Add an AEMeasurable version of Measure theory / Probability theory
Measure.map_add
t-measure-probability
#35782
opened Feb 25, 2026 by
DavidLedvinka
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feat(Analysis/SchwartzMap): translation of arguments
t-analysis
Analysis (normed *, calculus)
#35781
opened Feb 25, 2026 by
mcdoll
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feat: more lemmas about This PR depends on another PR (this label is automatically managed by a bot)
Order.cof
blocked-by-other-PR
refactor(Combinatorics): move This PR depends on another PR (this label is automatically managed by a bot)
WIP
Work in progress
Walk from SimpleGraph to HasAdj
blocked-by-other-PR
#35777
opened Feb 25, 2026 by
IvanRenison
•
Draft
3 tasks
feat(Combinatorics): define Combinatorics
WIP
Work in progress
HasAdj for capturing the common structure of different kinds of (simple) graphs
t-combinatorics
#35776
opened Feb 25, 2026 by
IvanRenison
•
Draft
feat(Data/List): add theorem Data (lists, quotients, numbers, etc)
length_eq_two'
t-data
#35775
opened Feb 25, 2026 by
IvanRenison
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chore: use Order theory
IsLUB IsGLB in ConditionallyCompleteLattice
t-order
#35774
opened Feb 25, 2026 by
astrainfinita
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refactor(Algebra/Category/ModuleCat): another approach to the module structure on stalks
blocked-by-other-PR
This PR depends on another PR (this label is automatically managed by a bot)
t-algebra
Algebra (groups, rings, fields, etc)
t-category-theory
Category theory
WIP
Work in progress
#35773
opened Feb 25, 2026 by
joelriou
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1 task
feat(RingTheory/Localization/FractionRing): add DecidableEq instance
t-ring-theory
Ring theory
#35770
opened Feb 25, 2026 by
mariainesdff
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feat(Order/WellFounded): the cardinality of a set is an upper-bound for the amount of elements before the set's mex
t-order
Order theory
#35769
opened Feb 25, 2026 by
SnirBroshi
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feat(RingTheory/DividedPowers/Basic): add lemmas
t-ring-theory
Ring theory
#35768
opened Feb 25, 2026 by
mariainesdff
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feat: asymptotics of the Analysis (normed *, calculus)
logCounting function of Value Distribution Theory
t-analysis
#35767
opened Feb 25, 2026 by
kebekus
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feat(Probability): add Monotonicity of setBernoulli on IsUpperSet
#35766
opened Feb 25, 2026 by
DavidLedvinka
•
Draft
feat(Data/Finsupp): characterise when Data (lists, quotients, numbers, etc)
Finsupp is Nontrivial
t-data
#35764
opened Feb 25, 2026 by
YaelDillies
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