https://mathlib-initiative.org/
Mathlib Initiative
The Mathlib Initiative supports the development of mathematical libraries in the Lean theorem prover.
mathlibinitiative
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/GroupWithZero/Pi.html
Mathlib.Algebra.GroupWithZero.Pi
mathlibalgebrapi
https://leanprover-community.github.io/mathlib4_docs/Mathlib/GroupTheory/Nilpotent.html
Mathlib.GroupTheory.Nilpotent
mathlib
https://cs.brown.edu/courses/cs1951x/docs/init/data/char/lemmas.html
core / init.data.char.lemmas - mathlib docs
coreinitdatacharlemmas
https://leanprover-community.github.io/queueboard/triage.html?search=whocares-abt
Mathlib review and triage dashboard
mathlibreviewtriagedashboard
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Combinatorics/SetFamily/Shatter.html
Mathlib.Combinatorics.SetFamily.Shatter
mathlibcombinatoricsshatter
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Tactic/SetLike.html
Mathlib.Tactic.SetLike
mathlibtactic
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Sign/Defs.html
Mathlib.Data.Sign.Defs
mathlibdatasigndefs
https://leanprover-community.github.io/mathlib4_docs/Mathlib/CategoryTheory/EpiMono.html
Mathlib.CategoryTheory.EpiMono
mathlib
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Separation/Regular.html
Mathlib.Topology.Separation.Regular
mathlibtopologyseparationregular
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/ZMod/Defs.html
Mathlib.Data.ZMod.Defs
mathlibdatadefs
https://leanprover-community.github.io/mathlib4_docs/Mathlib/LinearAlgebra/RootSystem/Irreducible.html
Mathlib.LinearAlgebra.RootSystem.Irreducible
mathlib
https://leanprover-community.github.io/mathlib4_docs/Mathlib/MeasureTheory/Integral/IntervalIntegral/LebesgueDifferentiationThm.html
Mathlib.MeasureTheory.Integral.IntervalIntegral.LebesgueDifferentiationThm
mathlibintegral
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Probability/Kernel/Composition/MapComap.html
Mathlib.Probability.Kernel.Composition.MapComap
mathlibprobabilitykernelcomposition
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Geometry/Manifold/VectorBundle/Basic.html
Mathlib.Geometry.Manifold.VectorBundle.Basic
mathlibgeometrymanifoldbasic
https://cs.brown.edu/courses/cs1951x/docs/init/meta/has_reflect.html
core / init.meta.has_reflect - mathlib docs
coreinitmetareflectmathlib
https://cs.brown.edu/courses/cs1951x/docs/data/finset/pointwise.html
data.finset.pointwise - mathlib docs
Pointwise operations of finsets: This file defines pointwise algebraic operations on finsets. Main declarations: For finsets `s` and `t`: `0`...
datapointwisemathlibdocs
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Normed/MulAction.html
Mathlib.Analysis.Normed.MulAction
mathlibanalysisnormed
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Connected/Basic.html
Mathlib.Topology.Connected.Basic
mathlibtopologyconnectedbasic
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Geometry/Euclidean/Angle/Unoriented/RightAngle.html
Mathlib.Geometry.Euclidean.Angle.Unoriented.RightAngle
mathlibgeometryeuclideanangle
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/GroupWithZero/Indicator.html
Mathlib.Algebra.GroupWithZero.Indicator
mathlibalgebraindicator
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/LocallyConstant/Basic.html
Mathlib.Topology.LocallyConstant.Basic
mathlibtopologybasic
https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/Extension/Cotangent/Basic.html
Mathlib.RingTheory.Extension.Cotangent.Basic
mathlibextensioncotangentbasic
https://cs.brown.edu/courses/cs1951x/docs/algebraic_topology/nerve.html
algebraic_topology.nerve - mathlib docs
The nerve of a category: This file provides the definition of the nerve of a category `C`, which is a simplicial set `nerve C` (see [goerss-jardine-2009],...
algebraic topologynervemathlibdocs
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Logic/IsEmpty/Basic.html
Mathlib.Logic.IsEmpty.Basic
mathliblogicisemptybasic
https://leanprover-community.github.io/queueboard/triage.html?search=Yaohua-Leo
Mathlib review and triage dashboard
mathlibreviewtriagedashboard
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/DirectSum/AddChar.html
Mathlib.Algebra.DirectSum.AddChar
mathlibalgebra
https://leanprover-community.github.io/mathlib4_docs/Mathlib/CategoryTheory/Monoidal/Category.html
Mathlib.CategoryTheory.Monoidal.Category
mathlibcategory
https://leanprover-community.github.io/mathlib4_docs/Mathlib/LinearAlgebra/ExteriorAlgebra/Basic.html
Mathlib.LinearAlgebra.ExteriorAlgebra.Basic
mathlibbasic
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/CharZero/Quotient.html
Mathlib.Algebra.CharZero.Quotient
mathlibalgebraquotient
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/Notation.html
Mathlib.Order.Notation
mathlibordernotation
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Order/LowerUpperTopology.html
Mathlib.Topology.Order.LowerUpperTopology
mathlibtopologyorder
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Combinatorics/Additive/FreimanHom.html
Mathlib.Combinatorics.Additive.FreimanHom
mathlibcombinatoricsadditive
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/GroupWithZero/Basic.html
Mathlib.Algebra.GroupWithZero.Basic
mathlibalgebrabasic
https://leanprover-community.github.io/mathlib4_docs/Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.html
Mathlib.AlgebraicTopology.FundamentalGroupoid.Basic
mathlibbasic
https://leanprover-community.github.io/queueboard/triage.html?search=alok
Mathlib review and triage dashboard
mathlibreviewtriagedashboard
https://leanprover-community.github.io/mathlib4_docs/Mathlib/MeasureTheory/MeasurableSpace/Defs.html
Mathlib.MeasureTheory.MeasurableSpace.Defs
mathlibdefs
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Logic/Nontrivial/Basic.html
Mathlib.Logic.Nontrivial.Basic
mathliblogicbasic
https://leanprover-community.github.io/mathlib4_docs/Mathlib/ModelTheory/Bundled.html
Mathlib.ModelTheory.Bundled
mathlibbundled
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Calculus/InverseFunctionTheorem/FDeriv.html
Mathlib.Analysis.Calculus.InverseFunctionTheorem.FDeriv
mathlibanalysiscalculus
https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/Lasker.html
Mathlib.RingTheory.Lasker
mathliblasker
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Ring/Pow.html
Mathlib.Algebra.Order.Ring.Pow
order ringmathlibalgebrapow
https://leanprover-community.github.io/blog/posts/mathlib-reviewer-bootcamp/
Our Experience at the Mathlib Reviewer Bootcamp 2026 | Lean community blog
Apr 25, 2026 - Hear about our experience at the Mathlib Reviewer Bootcamp.
our experienceat thelean communitymathlib
https://leanprover-community.github.io/mathlib4_docs/Mathlib/CategoryTheory/ObjectProperty/LimitsOfShape.html
Mathlib.CategoryTheory.ObjectProperty.LimitsOfShape
mathlib
https://jmvdveer.home.xs4all.nl/en.vintage-fortran.mathlib-lapack-arpack.c.html
en.vintage-fortran.mathlib-lapack-arpack.c.html
envintagefortranmathliblapack
https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/Spectrum/Prime/Homeomorph.html
Mathlib.RingTheory.Spectrum.Prime.Homeomorph
mathlibspectrumprime
https://cs.brown.edu/courses/cs1951x/docs/init/meta/type_context.html
core / init.meta.type_context - mathlib docs
coreinitmetatypecontext
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Group/Units.html
Mathlib.Algebra.Order.Group.Units
mathlibalgebraordergroupunits
https://leanprover-community.github.io/mathlib4_docs/Mathlib/GroupTheory/Congruence/Basic.html
Mathlib.GroupTheory.Congruence.Basic
mathlibcongruencebasic
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Tactic/Field.html
Mathlib.Tactic.Field
mathlibtacticfield
https://leanprover-community.github.io/mathlib4_docs/Mathlib/CategoryTheory/Limits/Shapes/Reflexive.html
Mathlib.CategoryTheory.Limits.Shapes.Reflexive
mathliblimitsshapesreflexive
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Combinatorics/Additive/ETransform.html
Mathlib.Combinatorics.Additive.ETransform
mathlibcombinatoricsadditive
https://leanprover-community.github.io/mathlib4_docs/Mathlib/LinearAlgebra/PerfectPairing/Restrict.html
Mathlib.LinearAlgebra.PerfectPairing.Restrict
mathlibrestrict
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Multiset/Count.html
Mathlib.Data.Multiset.Count
mathlibdatamultisetcount
https://leanprover-community.github.io/mathlib4_docs/Mathlib/CategoryTheory/NatTrans.html
Mathlib.CategoryTheory.NatTrans
mathlib
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Category/ContinuousCohomology/Basic.html
Mathlib.Algebra.Category.ContinuousCohomology.Basic
mathlibalgebracategorybasic
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/GroupWithZero/Hom.html
Mathlib.Algebra.GroupWithZero.Hom
mathlibalgebrahom
https://leanprover-community.github.io/mathlib4_docs/Mathlib/NumberTheory/SumFourSquares.html
Mathlib.NumberTheory.SumFourSquares
mathlib
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Computability/DFA.html
Mathlib.Computability.DFA
mathlibcomputabilitydfa
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/Bounds/Image.html
Mathlib.Order.Bounds.Image
mathliborderboundsimage
https://leanprover-community.github.io/mathlib4_docs/Mathlib/NumberTheory/Padics/Hensel.html
Mathlib.NumberTheory.Padics.Hensel
mathlibhensel
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Nat/Cast/NeZero.html
Mathlib.Data.Nat.Cast.NeZero
mathlibdatanatcast
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Lie/Ideal.html
Mathlib.Algebra.Lie.Ideal
mathlibalgebralieideal
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Geometry/Convex/Cone/TensorProduct.html
Mathlib.Geometry.Convex.Cone.TensorProduct
mathlibgeometryconvexcone
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Lie/Basic.html
Mathlib.Algebra.Lie.Basic
mathlibalgebraliebasic
https://leanprover-community.github.io/mathlib4_docs/Mathlib/MeasureTheory/Measure/Decomposition/Lebesgue.html
Mathlib.MeasureTheory.Measure.Decomposition.Lebesgue
mathlibmeasuredecomposition
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/DirectedInverseSystem.html
Mathlib.Order.DirectedInverseSystem
mathliborder
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/SpecialFunctions/Log/NegMulLog.html
Mathlib.Analysis.SpecialFunctions.Log.NegMulLog
mathlibanalysislog
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/GroupWithZero/Action/Basic.html
Mathlib.Algebra.GroupWithZero.Action.Basic
mathlibalgebraactionbasic
https://cs.brown.edu/courses/cs1951x/docs/algebra/ring_quot.html
algebra.ring_quot - mathlib docs
Quotients of non-commutative rings: Unfortunately, ideals have only been developed in the commutative case as `ideal`, and it's not immediately clear how one...
algebraringquotmathlibdocs
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Finset/Update.html
Mathlib.Data.Finset.Update
mathlibdataupdate
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Group/Equiv/Opposite.html
Mathlib.Algebra.Group.Equiv.Opposite
algebra groupmathlibequivopposite
https://leanprover-community.github.io/queueboard/triage.html?search=yu-yama
Mathlib review and triage dashboard
mathlibreviewtriagedashboard
https://leanprover-community.github.io/mathlib4_docs/Mathlib/MeasureTheory/Measure/Typeclasses/Probability.html
Mathlib.MeasureTheory.Measure.Typeclasses.Probability
mathlibmeasureprobability
https://leanprover-community.github.io/mathlib4_docs/Mathlib/MeasureTheory/Function/L2Space.html
Mathlib.MeasureTheory.Function.L2Space
mathlibfunction
https://leanprover-community.github.io/mathlib4_docs/Mathlib/GroupTheory/GroupAction/Hom.html
Mathlib.GroupTheory.GroupAction.Hom
mathlibgroupactionhom
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Monoid/Unbundled/ExistsOfLE.html
Mathlib.Algebra.Order.Monoid.Unbundled.ExistsOfLE
mathlibalgebraordermonoid
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Combinatorics/Additive/SmallTripling.html
Mathlib.Combinatorics.Additive.SmallTripling
mathlibcombinatoricsadditive
https://jmvdveer.home.xs4all.nl/en.vintage-fortran.mathlib-slatec-depac.c.html
en.vintage-fortran.mathlib-slatec-depac.c.html
envintagefortranmathlibdepac
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Array/Extract.html
Mathlib.Data.Array.Extract
mathlibdataarrayextract
https://leanprover-community.github.io/mathlib4_docs/Mathlib/AlgebraicGeometry/Morphisms/Constructors.html
Mathlib.AlgebraicGeometry.Morphisms.Constructors
mathlibconstructors
https://leanprover-community.github.io/mathlib-overview.html
Mathematics in mathlib
mathematicsmathlib
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Probability/HasLaw.html
Mathlib.Probability.HasLaw
mathlibprobability
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Group/Pointwise/Set/Basic.html
Mathlib.Algebra.Group.Pointwise.Set.Basic
algebra groupmathlibpointwisesetbasic
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Fintype/Units.html
Mathlib.Data.Fintype.Units
mathlibdataunits
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Normed/Module/Convex.html
Mathlib.Analysis.Normed.Module.Convex
mathlibanalysisnormedmoduleconvex
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Computability/ContextFreeGrammar.html
Mathlib.Computability.ContextFreeGrammar
mathlibcomputability
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Set/Constructions.html
Mathlib.Data.Set.Constructions
data setmathlibconstructions
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Category/ModuleCat/Subobject.html
Mathlib.Algebra.Category.ModuleCat.Subobject
mathlibalgebracategory
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Set/BooleanAlgebra.html
Mathlib.Data.Set.BooleanAlgebra
data setmathlib
https://leanprover-community.github.io/contribute/index.html
How to contribute to mathlib
how to contributemathlib
https://cs.brown.edu/courses/cs1951x/docs/linear_algebra/nonsingular_inverse.html
linear_algebra.nonsingular_inverse - mathlib docs
Nonsingular inverses. In this file, we define an inverse for square matrices of invertible determinant. For matrices that are not square or not of full rank,...
linear algebrainversemathlibdocs
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Combinatorics/SimpleGraph/Walk/Basic.html
Mathlib.Combinatorics.SimpleGraph.Walk.Basic
mathlibcombinatoricswalkbasic
https://leanprover-community.github.io/mathlib4_docs/Mathlib/NumberTheory/ADEInequality.html
Mathlib.NumberTheory.ADEInequality
mathlib
https://leanprover-community.github.io/queueboard/triage.html?search=casavaca
Mathlib review and triage dashboard
mathlibreviewtriagedashboard
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Probability/Distributions/Exponential.html
Mathlib.Probability.Distributions.Exponential
probability distributionsmathlibexponential
https://leanprover-community.github.io/mathlib4_docs/Mathlib/CategoryTheory/ObjectProperty/ClosedUnderIsomorphisms.html
Mathlib.CategoryTheory.ObjectProperty.ClosedUnderIsomorphisms
mathlib
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Combinatorics/Quiver/Basic.html
Mathlib.Combinatorics.Quiver.Basic
mathlibcombinatoricsquiverbasic
https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Seminorm.html
Mathlib.Analysis.Seminorm
mathlibanalysis
https://leanprover-community.github.io/mathlib4_docs/Mathlib/CategoryTheory/Closed/FunctorToTypes.html
Mathlib.CategoryTheory.Closed.FunctorToTypes
mathlibclosed