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Pull requests: leanprover-community/mathlib4
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feat(LinearAlgebra/Alternating): add map_eq_zero_of_card_lt
t-algebra
Algebra (groups, rings, fields, etc)
#34052
opened Jan 16, 2026 by
JohnnyTeutonic
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feat(GraphTheory): Graham-Pollak theorem
awaiting-author
A reviewer has asked the author a question or requested changes.
t-combinatorics
Combinatorics
WIP
Work in progress
#34050
opened Jan 16, 2026 by
Julian
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feat(Algebra/Polynomial/Splits): generalize This PR doesn't pass CI yet. This label is automatically removed once it does.
t-algebra
Algebra (groups, rings, fields, etc)
t-ring-theory
Ring theory
Splits.of_splits_map to injective ring homomorphisms
awaiting-CI
#34048
opened Jan 16, 2026 by
tb65536
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chore: deprecate Analysis/Normed/Order/Basic
t-analysis
Analysis (normed *, calculus)
#34047
opened Jan 16, 2026 by
grunweg
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feat(Algebra/Polynomial/Splits): add This PR doesn't pass CI yet. This label is automatically removed once it does.
t-algebra
Algebra (groups, rings, fields, etc)
t-ring-theory
Ring theory
Splits.image_rootSet_of_monic
awaiting-CI
#34046
opened Jan 16, 2026 by
tb65536
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feat: This PR depends on another PR (this label is automatically managed by a bot)
FLT
part of the ongoing formalization of Fermat's Last Theorem
algebraMap K L is uniform continuous with respect to adic topologies, when the ideal w of L lies above v
blocked-by-other-PR
#34045
opened Jan 16, 2026 by
smmercuri
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1 task
feat(Chebyshev/RootsExtrema): Irrationality of roots of Chebyshev T (other than zero)
large-import
Automatically added label for PRs with a significant increase in transitive imports
#34044
opened Jan 16, 2026 by
YuvalFilmus
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chore: deprecate Data/Tree/RBMap
easy
< 20s of review time. See the lifecycle page for guidelines.
large-import
Automatically added label for PRs with a significant increase in transitive imports
t-data
Data (lists, quotients, numbers, etc)
tech debt
Tracking cross-cutting technical debt, see e.g. the "Technical debt counters" stream on zulip
#34043
opened Jan 16, 2026 by
grunweg
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feat(to_dual): use the new This PR depends on another PR (this label is automatically managed by a bot)
merge-conflict
The PR has a merge conflict with master, and needs manual merging. (this label is managed by a bot)
to_dual_cast framework
blocked-by-other-PR
#34042
opened Jan 16, 2026 by
JovanGerb
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1 task
feat(LinearAlgebra/Matrix/Permutation): This PR doesn't pass CI yet. This label is automatically removed once it does.
t-algebra
Algebra (groups, rings, fields, etc)
permMatrix as a homomorphism
awaiting-CI
#34041
opened Jan 16, 2026 by
tb65536
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feat: generalize HasCompl.compl image/preimage lemmas to Involutive
t-data
Data (lists, quotients, numbers, etc)
#34040
opened Jan 16, 2026 by
Ruben-VandeVelde
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feat(finiteness): support Tactics, attributes or user commands
finiteness [h, h'] syntax
t-meta
#34039
opened Jan 16, 2026 by
grunweg
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feat(scripts/autolabel): allow up to 3 topic labels to be added
CI
Modifies the continuous integration setup or other automation
#34038
opened Jan 16, 2026 by
joneugster
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doc(Chebyshev): update TODO
easy
< 20s of review time. See the lifecycle page for guidelines.
ready-to-merge
This PR has been sent to bors.
#34037
opened Jan 16, 2026 by
YuvalFilmus
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feat(Topology/Sets): range of < 20s of review time. See the lifecycle page for guidelines.
t-topology
Topological spaces, uniform spaces, metric spaces, filters
NonemptyCompacts.toCompacts
easy
#34036
opened Jan 16, 2026 by
gasparattila
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feat(Order): add This PR was made by a contributor with at most 5 merged PRs. Welcome to the community!
t-order
Order theory
OrderType definitions
new-contributor
#34034
opened Jan 16, 2026 by
YanYablonovskiy
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2 tasks
feat(Asymptotics/TVS): define A reviewer has asked the author a question or requested changes.
t-analysis
Analysis (normed *, calculus)
IsThetaTVS
awaiting-author
#34033
opened Jan 16, 2026 by
urkud
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feat(Order/Filter/Extr): local minimum and local maximum implies const
delegated
This pull request has been delegated to the PR author (or occasionally another non-maintainer).
easy
< 20s of review time. See the lifecycle page for guidelines.
ready-to-merge
This PR has been sent to bors.
t-order
Order theory
#34032
opened Jan 16, 2026 by
b-mehta
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feat(Dynamics/BirkhoffSum): add the maximal ergodic theorem
blocked-by-other-PR
This PR depends on another PR (this label is automatically managed by a bot)
t-dynamics
Dynamical Systems
#34031
opened Jan 16, 2026 by
lua-vr
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3 tasks
feat(Integral/Bochnet/Set): add setIntegral_compl₀
ready-to-merge
This PR has been sent to bors.
t-measure-probability
Measure theory / Probability theory
#34030
opened Jan 16, 2026 by
lua-vr
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feat(Order/PartialSups): add exists_partialSups_eq
t-order
Order theory
#34029
opened Jan 16, 2026 by
lua-vr
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feat(SimpleGraph): add max-flow/min-cut weak duality
new-contributor
This PR was made by a contributor with at most 5 merged PRs. Welcome to the community!
t-combinatorics
Combinatorics
#34028
opened Jan 16, 2026 by
floor-licker
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chore(Analysis/Distribution): split off derivatives from A Lean module was (re)moved without a `deprecated_module` annotation
t-analysis
Analysis (normed *, calculus)
tech debt
Tracking cross-cutting technical debt, see e.g. the "Technical debt counters" stream on zulip
SchwartzSpace and create new folder
file-removed
#34027
opened Jan 16, 2026 by
mcdoll
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