Topics

Sources by mathematical topic. A source may appear under more than one topic.

Foundations and type theory

Category theory 32 sources

SourceMathematical content
ImperialCollegeLondon/condensed-setsEarly condensed mathematics (Lean 3)
Mizar Mathematical LibraryMizar Mathematical Library: a centrally maintained collection of formal definitions and proofs across mainstream mathematics
Paul-Lez/PersistentDecompStructure theorem for persistence modules
UniMath/UniMathUnivalent mathematics in Rocq/Coq; large formal category-theory corpus
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
Verified-zkEVM/PolyFunPolynomial functors and interaction trees
YellPika/quasi-borel-spacesQuasi-Borel spaces
YijunYuan/HarderNarasimhanHarder–Narasimhan theory
agda/agda-categoriesCategory theory in Agda: limits, adjunctions, monoidal/enriched and higher categorical structures, fibrations and topoi
agda/cubicalCubical type theory, homotopy type theory, and related mathematics in Agda
alexkeizer/QPFTypesQuotients of polynomial functors; definitional (co)datatypes
awodey/joyalJoyal's representation theorem
dagurtomas/LeanCondensedAdditional work on condensed mathematics by the author of Mathlib's condensed-mathematics library
dagurtomas/lean-solidSolid abelian groups
emilyriehl/infinity-cosmos∞-cosmos theory over Mathlib's quasicategories; formal ∞-category theory
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
ivankobe/FactorizationSystemsFactorization systems
jwiegley/category-theoryLarge axiom-free category-theory development: categories, functors, adjunctions, (co)limits, Kan constructions, monads/comonads and related structures
kim-em/lean-category-theoryEarly category-theory development later incorporated into Mathlib
leanprover-community/lean-liquidLiquid Tensor Experiment (Lean 3; condensed foundations now in Mathlib)
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
mariovagomarzal/higher_category_theoryHigher-order categories after Cosme Llópez
mattrobball/BridgelandStabilityBridgeland stability conditions on triangulated categories
peabrainiac/lean-catdgCategorical differential geometry
riccardobrasca/SDGSynthetic differential geometry
rkirov/category-theory-in-context-leanLean companion to Riehl's Category Theory in Context
sinhp/HoTTLeanGroupoid and natural models of HoTT; semantics of type theory
sinhp/LeanFibredCategoriesFibred categories; this development is inactive and has been superseded by the corresponding Mathlib material
sinhp/PolyPolynomial functors and locally cartesian closed categories
sinhp/displayed_categoriesDisplayed categories, including fibers, cartesian lifts, and Street fibrations
standardml/twelfTwelf/LF examples and case studies: lambda calculi, Cartesian closed categories, Church–Rosser, cut elimination, Mini-ML, logic programming and metatheory
the1lab/1labCross-linked HoTT reference in cubical Agda

Higher category theory 7 sources

SourceMathematical content
UniMath/UniMathUnivalent mathematics in Rocq/Coq; large formal category-theory corpus
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
agda/agda-categoriesCategory theory in Agda: limits, adjunctions, monoidal/enriched and higher categorical structures, fibrations and topoi
agda/cubicalCubical type theory, homotopy type theory, and related mathematics in Agda
emilyriehl/infinity-cosmos∞-cosmos theory over Mathlib's quasicategories; formal ∞-category theory
mariovagomarzal/higher_category_theoryHigher-order categories after Cosme Llópez
the1lab/1labCross-linked HoTT reference in cubical Agda

Logic 35 sources

SourceMathematical content
CakeML/candleFormal definitions and proofs for Candle, a verified implementation of HOL Light developed within CakeML
FormalizedFormalLogic/FoundationMathematical logic: completeness, incompleteness, provability logic
FormalizedFormalLogic/IncompletenessIncompleteness theorems; with FormalizedFormalLogic/ProvabilityLogic
HOL-Theorem-Prover/HOLHOL4 libraries covering higher-order logic, algebra, analysis, semantics, and large formal developments
HOLMS-lib/HOLMSHOL Light Library for Modal Systems: Kripke semantics, normal modal logics, labelled calculi, completeness and verified proof search
Mathias-Stout/Many-sorted-model-theoryMany-sorted logic toward the model theory of valued fields
Mizar Mathematical LibraryMizar Mathematical Library: a centrally maintained collection of formal definitions and proofs across mainstream mathematics
PierreSenellart/descriptive-complexityDescriptive complexity: NP-completeness via first-order reductions
SRI-CSL/PVSPVS and its standard libraries, including the formal definitions used by NASALib
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
VTrelat/ZFLeanSet-theoretic development framework
acl2/acl2ACL2 Community Books: arithmetic, algebra, data structures, formal models of hardware and software, verified algorithms, and reusable definitions
agda/agda-stdlibAgda standard library: algebraic structures, orders, relations, finite structures, and data types
avigad/lamrLogic and Mechanized Reasoning textbook and code
codyroux/traat-leanSelected lemmas from Term Rewriting and All That
digama0/mm0Metamath Zero/One formal specifications and examples, including arithmetic and metatheory
flypitch/flypitchIndependence of the continuum hypothesis (Lean 3)
iris/irisIris higher-order concurrent separation logic and program logic, including ghost-state constructions and proof automation
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
isabelle-prover/mirror-isabelleIsabelle/HOL libraries covering logic, sets, algebra, analysis, topology, number theory, probability, and foundational theories
jrh13/hol-lightHOL Light and its mathematical library: analysis, topology, geometry, algebra, number theory, and related foundational material
leanprover-community/con-nfConsistency of Quine's New Foundations
leanprover-community/iris-leanIris separation logic port
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
martinescardo/TypeTopologyTopology and logic from the univalent point of view, in Agda
metamath/set.mmMetamath Proof Explorer and companion databases: ZFC mathematics plus intuitionistic set theory, NF, higher-order and quantum logic databases
nasa/pvslibNASALib: PVS formalizations spanning algebra, analysis, geometry, numerical methods, decision procedures, and applications
rocq-community/cornConstructive mathematics library in Rocq/Coq
rocq-prover/rocqRocq core library: elementary logic, basic data types, equality, arithmetic foundations, and well-founded recursion
rocq-prover/stdlibRocq standard mathematical library: sets, lists, sorting, arithmetic, numbers, relations, and general-purpose definitions and theorems
seL4/l4vIsabelle/HOL formal specifications and proofs for seL4, with reusable theories for machine words, state monads, separation logic, refinement, and program verification
standardml/twelfTwelf/LF examples and case studies: lambda calculi, Cartesian closed categories, Church–Rosser, cut elimination, Mini-ML, logic programming and metatheory
sven-manthe/A-formalization-of-Borel-determinacy-in-LeanBorel determinacy
teorth/equational_theoriesImplication graph between magma equational laws
ufmg-smite/lean-smtAutomated proof tactics using satisfiability-modulo-theories solvers

Set theory 13 sources

SourceMathematical content
Mizar Mathematical LibraryMizar Mathematical Library: a centrally maintained collection of formal definitions and proofs across mainstream mathematics
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
VTrelat/ZFLeanSet-theoretic development framework
YnirPaz/PCF-TheoryPCF theory
digama0/mm0Metamath Zero/One formal specifications and examples, including arithmetic and metatheory
flypitch/flypitchIndependence of the continuum hypothesis (Lean 3)
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
isabelle-prover/mirror-isabelleIsabelle/HOL libraries covering logic, sets, algebra, analysis, topology, number theory, probability, and foundational theories
leanprover-community/con-nfConsistency of Quine's New Foundations
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
metamath/set.mmMetamath Proof Explorer and companion databases: ZFC mathematics plus intuitionistic set theory, NF, higher-order and quantum logic databases
rocq-prover/stdlibRocq standard mathematical library: sets, lists, sorting, arithmetic, numbers, relations, and general-purpose definitions and theorems
sven-manthe/A-formalization-of-Borel-determinacy-in-LeanBorel determinacy

Type theory 14 sources

SourceMathematical content
HoTT-Intro/AgdaSection-by-section Agda formalization of Rijke's Introduction to Homotopy Type Theory
HoTT/Coq-HoTTHomotopy type theory in Rocq/Coq
UniMath/UniMathUnivalent mathematics in Rocq/Coq; large formal category-theory corpus
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
agda/cubicalCubical type theory, homotopy type theory, and related mathematics in Agda
alexkeizer/QPFTypesQuotients of polynomial functors; definitional (co)datatypes
gebner/hott3HoTT (Lean 3)
martinescardo/TypeTopologyTopology and logic from the univalent point of view, in Agda
rocq-prover/rocqRocq core library: elementary logic, basic data types, equality, arithmetic foundations, and well-founded recursion
rzrn/ground_zeroHomotopy type theory in Lean 4
sinhp/HoTTLeanGroupoid and natural models of HoTT; semantics of type theory
sinhp/PolyPolynomial functors and locally cartesian closed categories
standardml/twelfTwelf/LF examples and case studies: lambda calculi, Cartesian closed categories, Church–Rosser, cut elimination, Mini-ML, logic programming and metatheory
the1lab/1labCross-linked HoTT reference in cubical Agda

Homotopy type theory 10 sources

SourceMathematical content
HoTT-Intro/AgdaSection-by-section Agda formalization of Rijke's Introduction to Homotopy Type Theory
HoTT/Coq-HoTTHomotopy type theory in Rocq/Coq
UniMath/UniMathUnivalent mathematics in Rocq/Coq; large formal category-theory corpus
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
agda/cubicalCubical type theory, homotopy type theory, and related mathematics in Agda
gebner/hott3HoTT (Lean 3)
martinescardo/TypeTopologyTopology and logic from the univalent point of view, in Agda
rzrn/ground_zeroHomotopy type theory in Lean 4
sinhp/HoTTLeanGroupoid and natural models of HoTT; semantics of type theory
the1lab/1labCross-linked HoTT reference in cubical Agda

Modal type theory 2 sources

SourceMathematical content
HOLMS-lib/HOLMSHOL Light Library for Modal Systems: Kripke semantics, normal modal logics, labelled calculi, completeness and verified proof search
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory

Model theory 2 sources

SourceMathematical content
Mathias-Stout/Many-sorted-model-theoryMany-sorted logic toward the model theory of valued fields
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects

Domain theory 3 sources

SourceMathematical content
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
martinescardo/TypeTopologyTopology and logic from the univalent point of view, in Agda
zilberstein/domain-theoryDomain theory

Order theory 5 sources

SourceMathematical content
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
agda/agda-stdlibAgda standard library: algebraic structures, orders, relations, finite structures, and data types
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
rocq-prover/stdlibRocq standard mathematical library: sets, lists, sorting, arithmetic, numbers, relations, and general-purpose definitions and theorems
zilberstein/domain-theoryDomain theory

Computability 12 sources

SourceMathematical content
FormalizedFormalLogic/FoundationMathematical logic: completeness, incompleteness, provability logic
PierreSenellart/descriptive-complexityDescriptive complexity: NP-completeness via first-order reductions
SamuelSchlesinger/sensitivity-conjectureHuang's proof of the sensitivity conjecture
Timeroot/ComputableRealComputable real numbers
acl2/acl2ACL2 Community Books: arithmetic, algebra, data structures, formal models of hardware and software, verified algorithms, and reusable definitions
avigad/lamrLogic and Mechanized Reasoning textbook and code
ctchou/AutomataTheoryAutomata theory
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
leanprover/cslibComputer science library
madvorak/chomskyChomsky hierarchy and formal grammars
rocq-prover/rocqRocq core library: elementary logic, basic data types, equality, arithmetic foundations, and well-founded recursion
shetzl/autthAutomata theory

Algebra

Universal algebra 3 sources

SourceMathematical content
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
agda/agda-stdlibAgda standard library: algebraic structures, orders, relations, finite structures, and data types
teorth/equational_theoriesImplication graph between magma equational laws

Finite algebraic structures 4 sources

SourceMathematical content
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
agda/agda-stdlibAgda standard library: algebraic structures, orders, relations, finite structures, and data types
iris/stdppGeneral-purpose Rocq definitions for data structures, finite maps, and algebra, used by Iris and independently reusable
math-comp/math-compMathematical Components: finite structures, algebra, finite group theory, field theory, matrices, and polynomials

Group theory 17 sources

SourceMathematical content
HOL-Theorem-Prover/HOLHOL4 libraries covering higher-order logic, algebra, analysis, semantics, and large formal developments
Luka-O/polya-enumeration-theoremPólya enumeration theorem
Mizar Mathematical LibraryMizar Mathematical Library: a centrally maintained collection of formal definitions and proofs across mainstream mathematics
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
chrisflav/bruhat-titsThe Bruhat–Tits tree
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
isabelle-prover/mirror-isabelleIsabelle/HOL libraries covering logic, sets, algebra, analysis, topology, number theory, probability, and foundational theories
jrh13/hol-lightHOL Light and its mathematical library: analysis, topology, geometry, algebra, number theory, and related foundational material
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
math-comp/math-compMathematical Components: finite structures, algebra, finite group theory, field theory, matrices, and polynomials
math-comp/odd-orderFeit–Thompson Odd Order Theorem and the supporting finite-group theory developed for its proof
metamath/set.mmMetamath Proof Explorer and companion databases: ZFC mathematics plus intuitionistic set theory, NF, higher-order and quantum logic databases
npflueger/demazureDemazure products
siddhartha-gadgil/PolyleanGroup extensions and torsion-freeness with computational proofs
singerng/steinberg-formalizationSteinberg groups
wupr/order-p-qClassification of groups of order pq
yawara/odd-orderFeit–Thompson odd order theorem in Lean 4, with the finite group theory library it required

Finite group theory 7 sources

SourceMathematical content
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
inQWIRE/QuantumLibReusable quantum-computing mathematics in Rocq/Coq: complex matrices, finite groups, subspaces, permutations, measurement and quantum operations
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
math-comp/math-compMathematical Components: finite structures, algebra, finite group theory, field theory, matrices, and polynomials
math-comp/odd-orderFeit–Thompson Odd Order Theorem and the supporting finite-group theory developed for its proof
wupr/order-p-qClassification of groups of order pq
yawara/odd-orderFeit–Thompson odd order theorem in Lean 4, with the finite group theory library it required

Higher group theory 2 sources

SourceMathematical content
HoTT/Coq-HoTTHomotopy type theory in Rocq/Coq
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory

Ring theory 21 sources

SourceMathematical content
AntoineChambert-Loir/DividedPowers4Divided power structures and the divided-power algebra
HOL-Theorem-Prover/HOLHOL4 libraries covering higher-order logic, algebra, analysis, semantics, and large formal developments
Hagb/lean-groebnerGröbner bases, independent development
JJYYY-JJY/lean-normal-formsExecutable Hermite and Smith normal forms over Euclidean domains, with proofs relating them to Mathlib's definitions
JobPetrovcic/ArtinWedderburnArtin–Wedderburn theorem
Mizar Mathematical LibraryMizar Mathematical Library: a centrally maintained collection of formal definitions and proofs across mainstream mathematics
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
Verified-zkEVM/CompPolyComputable polynomials
Whysoserioushah/BrauerGroupBrauer groups
WuProver/groebner_projGröbner basis theory; companions WuProver/MonomialOrderedPolynomial and WuProver/GroebnerTactic
girving/seriesPower series arithmetic, with related formalizations of Böttcher series and verified Mandelbrot rendering
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
isabelle-prover/mirror-isabelleIsabelle/HOL libraries covering logic, sets, algebra, analysis, topology, number theory, probability, and foundational theories
jrh13/hol-lightHOL Light and its mathematical library: analysis, topology, geometry, algebra, number theory, and related foundational material
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
leanprover/sosSum-of-squares tactic for nonlinear real arithmetic
math-comp/math-compMathematical Components: finite structures, algebra, finite group theory, field theory, matrices, and polynomials
metamath/set.mmMetamath Proof Explorer and companion databases: ZFC mathematics plus intuitionistic set theory, NF, higher-order and quantum logic databases
pitmonticone/QuadraticIntegersRings of integers of quadratic fields
riccardobrasca/kaplanski4Kaplansky's criterion for unique factorization domains
singerng/steinberg-formalizationSteinberg groups

Commutative algebra 16 sources

SourceMathematical content
AntoineChambert-Loir/DividedPowers4Divided power structures and the divided-power algebra
AxiomMath/fel-polynomialFel's conjecture on syzygies of numerical semigroups
BochaoKong/nullstellensatzLocal complex-analytic geometry: Rückert Nullstellensatz and foundations
CBirkbeck/uniform-sheafy-tate-domains-leanUniform sheafy Tate rings that are not stably uniform; Huber/Tate ring examples
Hagb/lean-groebnerGröbner bases, independent development
ImperialCollegeLondon/FLTOngoing Fermat's Last Theorem formalization with substantial commutative algebra, dimension theory, and number theory
Mizar Mathematical LibraryMizar Mathematical Library: a centrally maintained collection of formal definitions and proofs across mainstream mathematics
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
Whysoserioushah/BrauerGroupBrauer groups
WuProver/groebner_projGröbner basis theory; companions WuProver/MonomialOrderedPolynomial and WuProver/GroebnerTactic
acmepjz/lean-iwasawaIwasawa theory
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
leanprover-community/flt-regularFLT for regular primes; cyclotomic-field material
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
mariainesdff/LocalClassFieldTheoryLocal fields toward local class field theory, including discrete valuation rings, uniformizers, and completions at height-one primes
riccardobrasca/kaplanski4Kaplansky's criterion for unique factorization domains

Field theory 9 sources

SourceMathematical content
Mathias-Stout/Many-sorted-model-theoryMany-sorted logic toward the model theory of valued fields
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
alok/lean-infLevi-Civita field for infinitesimal computation
kbuzzard/ClassFieldTheory2025 Clay Summer School project on class field theory
leanprover-community/flt-regularFLT for regular primes; cyclotomic-field material
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
mariainesdff/HassePrincipleHilbert symbols and the Hasse–Minkowski invariant over general fields (Women in Numbers 7)
mariainesdff/LocalClassFieldTheoryLocal fields toward local class field theory, including discrete valuation rings, uniformizers, and completions at height-one primes
math-comp/math-compMathematical Components: finite structures, algebra, finite group theory, field theory, matrices, and polynomials

Linear algebra 30 sources

SourceMathematical content
FredRaj3/SemicircleLawWigner's semicircle law
HOL-Theorem-Prover/HOLHOL4 libraries covering higher-order logic, algebra, analysis, semantics, and large formal developments
JJYYY-JJY/lean-normal-formsExecutable Hermite and Smith normal forms over Euclidean domains, with proofs relating them to Mathlib's definitions
JobPetrovcic/ArtinWedderburnArtin–Wedderburn theorem
LieLean/LowDimSolvClassificationClassification of solvable Lie algebras of dimension at most three
LionSR/TNLeanTensor networks: fundamental theorem of matrix product states, canonical forms
MichaelStollBayreuth/LegendreQFLegendre's theorem on diagonal ternary quadratic forms; complete but defines no Hilbert symbol, Hasse invariant, or lattice notion
Mizar Mathematical LibraryMizar Mathematical Library: a centrally maintained collection of formal definitions and proofs across mainstream mathematics
Paul-Lez/PersistentDecompStructure theorem for persistence modules
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
dududuguo/HighDimProbHigh-dimensional probability, random matrices, concentration
eric-wieser/lean-matrix-cookbookThe Matrix Cookbook, proved
flyspeck/flyspeckHOL Light formalization of the Kepler conjecture, together with the supporting geometry and analysis
inQWIRE/QuantumLibReusable quantum-computing mathematics in Rocq/Coq: complex matrices, finite groups, subspaces, permutations, measurement and quantum operations
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
isabelle-prover/mirror-isabelleIsabelle/HOL libraries covering logic, sets, algebra, analysis, topology, number theory, probability, and foundational theories
jonhanke/quadratic_forms_in_leanQuadratic forms, with Cassels references and a small collection of definitions
jrh13/hol-lightHOL Light and its mathematical library: analysis, topology, geometry, algebra, number theory, and related foundational material
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
leanprover/TensorLibVerified tensor library
leanprover/hex-lllVerified LLL lattice-basis reduction with a proved short-vector bound; a companion library proves correspondence with Mathlib's lattice definitions
lecopivo/LeanBLASBLAS bindings and specification
madvorak/dualityLinear-programming duality
mariainesdff/HassePrincipleHilbert symbols and the Hasse–Minkowski invariant over general fields (Women in Numbers 7)
math-comp/math-compMathematical Components: finite structures, algebra, finite group theory, field theory, matrices, and polynomials
metamath/set.mmMetamath Proof Explorer and companion databases: ZFC mathematics plus intuitionistic set theory, NF, higher-order and quantum logic databases
nasa/pvslibNASALib: PVS formalizations spanning algebra, analysis, geometry, numerical methods, decision procedures, and applications
oliver-butterley/SpectralThmSpectral theorem
thefundamentaltheor3m/Sphere-Packing-LeanViazovska's dimension-8 sphere-packing theorem and the E8 lattice
thery/SelingerLaurent Théry's formalization of Selinger's quantum-gate synthesis proof, combining number-theoretic and linear-algebraic definitions over Mathematical Components

Representation theory 3 sources

SourceMathematical content
JobPetrovcic/ArtinWedderburnArtin–Wedderburn theorem
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects

Homological algebra 7 sources

SourceMathematical content
ImperialCollegeLondon/condensed-setsEarly condensed mathematics (Lean 3)
dagurtomas/LeanCondensedAdditional work on condensed mathematics by the author of Mathlib's condensed-mathematics library
dagurtomas/lean-solidSolid abelian groups
kkytola/VirasoroProjectWitt algebra cohomology and the Virasoro algebra
leanprover-community/lean-liquidLiquid Tensor Experiment (Lean 3; condensed foundations now in Mathlib)
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
mattrobball/BridgelandStabilityBridgeland stability conditions on triangulated categories

Lie theory 3 sources

SourceMathematical content
LieLean/LowDimSolvClassificationClassification of solvable Lie algebras of dimension at most three
kkytola/VirasoroProjectWitt algebra cohomology and the Virasoro algebra
leanprover-community/physlibFormalized mathematical physics in Lean, including Riemannian and pseudo-Riemannian geometry, tensor calculus, relativity, distributions, Lie groups, crystal lattices, topological field theory, and lattice quantum…

Quadratic forms 3 sources

SourceMathematical content
MichaelStollBayreuth/LegendreQFLegendre's theorem on diagonal ternary quadratic forms; complete but defines no Hilbert symbol, Hasse invariant, or lattice notion
jonhanke/quadratic_forms_in_leanQuadratic forms, with Cassels references and a small collection of definitions
mariainesdff/HassePrincipleHilbert symbols and the Hasse–Minkowski invariant over general fields (Women in Numbers 7)

Lattices 2 sources

SourceMathematical content
leanprover/hex-lllVerified LLL lattice-basis reduction with a proved short-vector bound; a companion library proves correspondence with Mathlib's lattice definitions
thefundamentaltheor3m/Sphere-Packing-LeanViazovska's dimension-8 sphere-packing theorem and the E8 lattice

Number theory

Elementary number theory 16 sources

SourceMathematical content
CBirkbeck/AINTLIBAtlas of formalized number theory
MichaelStollBayreuth/LegendreQFLegendre's theorem on diagonal ternary quadratic forms; complete but defines no Hilbert symbol, Hasse invariant, or lattice notion
Mizar Mathematical LibraryMizar Mathematical Library: a centrally maintained collection of formal definitions and proofs across mainstream mathematics
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
b-mehta/PrimeCertFormal prime certificates
hanwenzhu/miller-rabinMiller–Rabin primality test
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
isabelle-prover/mirror-isabelleIsabelle/HOL libraries covering logic, sets, algebra, analysis, topology, number theory, probability, and foundational theories
jrh13/hol-lightHOL Light and its mathematical library: analysis, topology, geometry, algebra, number theory, and related foundational material
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
metamath/set.mmMetamath Proof Explorer and companion databases: ZFC mathematics plus intuitionistic set theory, NF, higher-order and quantum logic databases
riccardobrasca/flt3Fermat's Last Theorem for exponent 3
rocq-prover/stdlibRocq standard mathematical library: sets, lists, sorting, arithmetic, numbers, relations, and general-purpose definitions and theorems
thery/SelingerLaurent Théry's formalization of Selinger's quantum-gate synthesis proof, combining number-theoretic and linear-algebraic definitions over Mathematical Components
thery/coqprimeNumber theory, elliptic curves, modular arithmetic, and primality certification
wwylele/PentagonalNumberTheoremEuler's pentagonal number theorem

Algebraic number theory 15 sources

SourceMathematical content
CBirkbeck/AINTLIBAtlas of formalized number theory
ImperialCollegeLondon/FLTOngoing Fermat's Last Theorem formalization with substantial commutative algebra, dimension theory, and number theory
MichaelStollBayreuth/HeightsTheory of heights
Mizar Mathematical LibraryMizar Mathematical Library: a centrally maintained collection of formal definitions and proofs across mainstream mathematics
acmepjz/lean-iwasawaIwasawa theory
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
kbuzzard/ClassFieldTheory2025 Clay Summer School project on class field theory
leanprover-community/flt-regularFLT for regular primes; cyclotomic-field material
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
mariainesdff/HassePrincipleHilbert symbols and the Hasse–Minkowski invariant over general fields (Women in Numbers 7)
mariainesdff/LocalClassFieldTheoryLocal fields toward local class field theory, including discrete valuation rings, uniformizers, and completions at height-one primes
pitmonticone/QuadraticIntegersRings of integers of quadratic fields
riccardobrasca/KummerCriterionKummer's criterion for regular primes
riccardobrasca/flt3Fermat's Last Theorem for exponent 3
smmercuri/adele-ring_locally-compactLocal compactness of the adele ring of a number field

Analytic number theory 11 sources

SourceMathematical content
AlexKontorovich/PrimeNumberTheoremAndPrime Number Theorem and related analytic number theory
CBirkbeck/AINTLIBAtlas of formalized number theory
CBirkbeck/DirichletNonvanishingNonvanishing of Dirichlet L-functions
MichaelStollBayreuth/EulerProductsEuler products and L-series
ahhwuhu/zeta_3_irrationalIrrationality of ζ(3)
amellendijk/selberg-sieve4The Selberg sieve
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
jrh13/hol-lightHOL Light and its mathematical library: analysis, topology, geometry, algebra, number theory, and related foundational material
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
math-inc/strongpntStrong prime number theorem with the required complex analysis
teorth/expdbExponent-pair database for analytic number theory

Arithmetic geometry 11 sources

SourceMathematical content
ANR-FALSE/PadicModFormsp-adic modular forms
CBirkbeck/ModularForms_Lean4Modular forms
ImperialCollegeLondon/FLTOngoing Fermat's Last Theorem formalization with substantial commutative algebra, dimension theory, and number theory
KisaraBlue/ec-tate-leanTate's algorithm for elliptic curves, executable
MichaelStollBayreuth/HeightsTheory of heights
b-mehta/ABC-ExceptionsExceptions to the ABC conjecture
kckennylau/EllipticCurveToward a general definition of elliptic curves over schemes
leanprover-community/lean-perfectoid-spacesPerfectoid spaces (Lean 3)
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
loefflerd/ModularFormDimensionsFinite-dimensionality of modular-form spaces
thery/coqprimeNumber theory, elliptic curves, modular arithmetic, and primality certification

p-adic number theory and geometry 9 sources

SourceMathematical content
ANR-FALSE/PadicModFormsp-adic modular forms
CBirkbeck/uniform-sheafy-tate-domains-leanUniform sheafy Tate rings that are not stably uniform; Huber/Tate ring examples
KisaraBlue/ec-tate-leanTate's algorithm for elliptic curves, executable
acmepjz/lean-iwasawaIwasawa theory
chrisflav/bruhat-titsThe Bruhat–Tits tree
kbuzzard/ClassFieldTheory2025 Clay Summer School project on class field theory
leanprover-community/lean-perfectoid-spacesPerfectoid spaces (Lean 3)
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
mariainesdff/LocalClassFieldTheoryLocal fields toward local class field theory, including discrete valuation rings, uniformizers, and completions at height-one primes

Modular forms 3 sources

SourceMathematical content
ANR-FALSE/PadicModFormsp-adic modular forms
CBirkbeck/ModularForms_Lean4Modular forms
loefflerd/ModularFormDimensionsFinite-dimensionality of modular-form spaces

Elliptic curves 3 sources

SourceMathematical content
KisaraBlue/ec-tate-leanTate's algorithm for elliptic curves, executable
kckennylau/EllipticCurveToward a general definition of elliptic curves over schemes
thery/coqprimeNumber theory, elliptic curves, modular arithmetic, and primality certification

Geometry and topology

Algebraic geometry 16 sources

SourceMathematical content
AntoineChambert-Loir/DividedPowers4Divided power structures and the divided-power algebra
BochaoKong/nullstellensatzLocal complex-analytic geometry: Rückert Nullstellensatz and foundations
CBirkbeck/uniform-sheafy-tate-domains-leanUniform sheafy Tate rings that are not stably uniform; Huber/Tate ring examples
DhyeyMavani2003/chip-firing-with-leanChip-firing games and Riemann–Roch for graphs
GeoCoq/GeoCoqSynthetic geometry from Tarski-style axioms, with Euclidean, Hilbert, parallel-postulate, and algebraic geometry developments
ImperialCollegeLondon/FLTOngoing Fermat's Last Theorem formalization with substantial commutative algebra, dimension theory, and number theory
MichaelStollBayreuth/WeightsMinimization of hypersurfaces (Elsenhans–Stoll)
Mizar Mathematical LibraryMizar Mathematical Library: a centrally maintained collection of formal definitions and proofs across mainstream mathematics
Whysoserioushah/BrauerGroupBrauer groups
YaelDillies/toricToric varieties over Mathlib's schemes
YijunYuan/HarderNarasimhanHarder–Narasimhan theory
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
kckennylau/EllipticCurveToward a general definition of elliptic curves over schemes
leanprover-community/lean-perfectoid-spacesPerfectoid spaces (Lean 3)
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
mattrobball/BridgelandStabilityBridgeland stability conditions on triangulated categories

Topology 17 sources

SourceMathematical content
AlexKontorovich/CoveringSpacesProjectCovering spaces and universal covers; overlaps the Tau Ceti universal-covers roadmap
Dominique-Lawson/Directed-Topology-Lean-4Directed topology
ImperialCollegeLondon/condensed-setsEarly condensed mathematics (Lean 3)
Mizar Mathematical LibraryMizar Mathematical Library: a centrally maintained collection of formal definitions and proofs across mainstream mathematics
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
dagurtomas/LeanCondensedAdditional work on condensed mathematics by the author of Mathlib's condensed-mathematics library
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
isabelle-prover/mirror-isabelleIsabelle/HOL libraries covering logic, sets, algebra, analysis, topology, number theory, probability, and foundational theories
jrh13/hol-lightHOL Light and its mathematical library: analysis, topology, geometry, algebra, number theory, and related foundational material
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
leanprover-community/sphere-eversionSphere eversion via convex integration; h-principle
martinescardo/TypeTopologyTopology and logic from the univalent point of view, in Agda
math-comp/analysisReal and classical analysis over Mathematical Components: topology, measure/integration, real numbers, sequences, and distributions
mccorvie/classification-of-surfacesClassification of compact surfaces
metamath/set.mmMetamath Proof Explorer and companion databases: ZFC mathematics plus intuitionistic set theory, NF, higher-order and quantum logic databases
rocq-community/cornConstructive mathematics library in Rocq/Coq
smmercuri/adele-ring_locally-compactLocal compactness of the adele ring of a number field

Algebraic topology 5 sources

SourceMathematical content
AlexKontorovich/CoveringSpacesProjectCovering spaces and universal covers; overlaps the Tau Ceti universal-covers roadmap
Paul-Lez/PersistentDecompStructure theorem for persistence modules
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
mccorvie/classification-of-surfacesClassification of compact surfaces

Homotopy theory 7 sources

SourceMathematical content
HoTT/Coq-HoTTHomotopy type theory in Rocq/Coq
UniMath/UniMathUnivalent mathematics in Rocq/Coq; large formal category-theory corpus
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
agda/cubicalCubical type theory, homotopy type theory, and related mathematics in Agda
emilyriehl/infinity-cosmos∞-cosmos theory over Mathlib's quasicategories; formal ∞-category theory
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
leanprover-community/sphere-eversionSphere eversion via convex integration; h-principle

Differential geometry 9 sources

SourceMathematical content
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
jrh13/hol-lightHOL Light and its mathematical library: analysis, topology, geometry, algebra, number theory, and related foundational material
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
leanprover-community/physlibFormalized mathematical physics in Lean, including Riemannian and pseudo-Riemannian geometry, tensor calculus, relativity, distributions, Lie groups, crystal lattices, topological field theory, and lattice quantum…
leanprover-community/sphere-eversionSphere eversion via convex integration; h-principle
nasa/pvslibNASALib: PVS formalizations spanning algebra, analysis, geometry, numerical methods, decision procedures, and applications
peabrainiac/lean-catdgCategorical differential geometry
riccardobrasca/SDGSynthetic differential geometry
urkud/SardMoreiraMoreira's version of Sard's theorem; with fpvandoorn/sard

Synthetic geometry 2 sources

SourceMathematical content
GeoCoq/GeoCoqSynthetic geometry from Tarski-style axioms, with Euclidean, Hilbert, parallel-postulate, and algebraic geometry developments
loganrjmurphy/LeanEuclidFormal System E for Euclidean geometry, Book I of Euclid's Elements, and the UniGeo formalized problem corpus

Discrete geometry 13 sources

SourceMathematical content
Antoine-dSG/frieze_patternsCoxeter's frieze patterns
Jun2M/Main-theorem-of-polytopesMain theorem of polytopes
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
YaelDillies/toricToric varieties over Mathlib's schemes
chrisflav/bruhat-titsThe Bruhat–Tits tree
dwrensha/Rupert.leanThe Rupert problem for convex polyhedra; with jcreedcmu/Noperthedron
flyspeck/flyspeckHOL Light formalization of the Kepler conjecture, together with the supporting geometry and analysis
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
jsm28/AperiodicMonotilesLeanFormalization of the aperiodic monotiles known as the hat and spectre
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
rocq-community/fourcolorFour Color Theorem, including the graph theory and real analysis needed for the proof
thefundamentaltheor3m/Sphere-Packing-LeanViazovska's dimension-8 sphere-packing theorem and the E8 lattice
vasnesterov/HadwigerNelsonHadwiger–Nelson bounds

Convex geometry 5 sources

SourceMathematical content
Jun2M/Main-theorem-of-polytopesMain theorem of polytopes
dwrensha/Rupert.leanThe Rupert problem for convex polyhedra; with jcreedcmu/Noperthedron
flyspeck/flyspeckHOL Light formalization of the Kepler conjecture, together with the supporting geometry and analysis
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
thefundamentaltheor3m/Sphere-Packing-LeanViazovska's dimension-8 sphere-packing theorem and the E8 lattice

Analysis and probability

Real analysis 24 sources

SourceMathematical content
HOL-Theorem-Prover/HOLHOL4 libraries covering higher-order logic, algebra, analysis, semantics, and large formal developments
Mizar Mathematical LibraryMizar Mathematical Library: a centrally maintained collection of formal definitions and proofs across mainstream mathematics
Timeroot/ComputableRealComputable real numbers
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
alerad/leancertVerified interval arithmetic: bounds on exp, sin, cos; root finding
alok/lean-infLevi-Civita field for infinitesimal computation
flyspeck/flyspeckHOL Light formalization of the Kepler conjecture, together with the supporting geometry and analysis
fpvandoorn/BonnAnalysisBonn collaborative analysis seminar (distributions, duality)
fpvandoorn/carlesonCarleson's theorem
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
isabelle-prover/mirror-isabelleIsabelle/HOL libraries covering logic, sets, algebra, analysis, topology, number theory, probability, and foundational theories
jrh13/hol-lightHOL Light and its mathematical library: analysis, topology, geometry, algebra, number theory, and related foundational material
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
leanprover/sosSum-of-squares tactic for nonlinear real arithmetic
lua-vr/pointwise-birkhoffPointwise Birkhoff ergodic theorem
math-comp/analysisReal and classical analysis over Mathematical Components: topology, measure/integration, real numbers, sequences, and distributions
metamath/set.mmMetamath Proof Explorer and companion databases: ZFC mathematics plus intuitionistic set theory, NF, higher-order and quantum logic databases
nasa/pvslibNASALib: PVS formalizations spanning algebra, analysis, geometry, numerical methods, decision procedures, and applications
rocq-community/cornConstructive mathematics library in Rocq/Coq
scottnarmstrong/DeGiorgiDe Giorgi–Nash–Moser theory
teorth/analysisLean companion to Tao's Analysis I
uda-lab/leray-hopfLeray–Hopf weak solutions of incompressible Navier–Stokes
urkud/SardMoreiraMoreira's version of Sard's theorem; with fpvandoorn/sard
weiran-sun/pdePDE formalizations

Complex analysis 16 sources

SourceMathematical content
AlexKontorovich/PrimeNumberTheoremAndPrime Number Theorem and related analytic number theory
BochaoKong/nullstellensatzLocal complex-analytic geometry: Rückert Nullstellensatz and foundations
CBirkbeck/DirichletNonvanishingNonvanishing of Dirichlet L-functions
Mizar Mathematical LibraryMizar Mathematical Library: a centrally maintained collection of formal definitions and proofs across mainstream mathematics
girving/rayMandelbrot-set results
girving/seriesPower series arithmetic, with related formalizations of Böttcher series and verified Mandelbrot rendering
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
isabelle-prover/mirror-isabelleIsabelle/HOL libraries covering logic, sets, algebra, analysis, topology, number theory, probability, and foundational theories
jrh13/hol-lightHOL Light and its mathematical library: analysis, topology, geometry, algebra, number theory, and related foundational material
kebekus/ProjectVDValue distribution theory (Nevanlinna)
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
math-inc/strongpntStrong prime number theorem with the required complex analysis
metamath/set.mmMetamath Proof Explorer and companion databases: ZFC mathematics plus intuitionistic set theory, NF, higher-order and quantum logic databases
samuelborza/IsTranscendentalPiTranscendence of π
teorth/sendovSendov's conjecture work
vbeffara/RMT4The Riemann mapping theorem

Functional analysis 11 sources

SourceMathematical content
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
fpvandoorn/BonnAnalysisBonn collaborative analysis seminar (distributions, duality)
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
jrh13/hol-lightHOL Light and its mathematical library: analysis, topology, geometry, algebra, number theory, and related foundational material
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
math-comp/analysisReal and classical analysis over Mathematical Components: topology, measure/integration, real numbers, sequences, and distributions
mrdouglasny/OSforGFFGaussian free field in d=4 and the Osterwalder–Schrader axioms
oliver-butterley/SpectralThmSpectral theorem
scottnarmstrong/DeGiorgiDe Giorgi–Nash–Moser theory
uda-lab/leray-hopfLeray–Hopf weak solutions of incompressible Navier–Stokes
weiran-sun/pdePDE formalizations

Harmonic analysis 3 sources

SourceMathematical content
fpvandoorn/carlesonCarleson's theorem
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
roos-j/lean-booleanfunAnalysis of Boolean functions, including Arrow's theorem

Measure theory 12 sources

SourceMathematical content
IBM/FormalMLGeneral probability in Rocq/Coq, including sigma-algebras, expectation, conditional expectation and martingales, with applications to stochastic approximation and reinforcement learning
Mizar Mathematical LibraryMizar Mathematical Library: a centrally maintained collection of formal definitions and proofs across mainstream mathematics
RemyDegenne/brownian-motionConstruction of Brownian motion; with RemyDegenne/kolmogorov_extension4
YellPika/quasi-borel-spacesQuasi-Borel spaces
cameronfreer/exchangeabilityExchangeability and three proofs of de Finetti's theorem
fpvandoorn/carlesonCarleson's theorem
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
isabelle-prover/mirror-isabelleIsabelle/HOL libraries covering logic, sets, algebra, analysis, topology, number theory, probability, and foundational theories
jrh13/hol-lightHOL Light and its mathematical library: analysis, topology, geometry, algebra, number theory, and related foundational material
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
lua-vr/pointwise-birkhoffPointwise Birkhoff ergodic theorem
math-comp/analysisReal and classical analysis over Mathematical Components: topology, measure/integration, real numbers, sequences, and distributions

Probability 21 sources

SourceMathematical content
FredRaj3/SemicircleLawWigner's semicircle law
IBM/FormalMLGeneral probability in Rocq/Coq, including sigma-algebras, expectation, conditional expectation and martingales, with applications to stochastic approximation and reinforcement learning
Lean-MoDS/StatsMLlibVerified probability, statistics, and learning theory; with Robby955/FormalSLT
LeanMachineLearning/LMLLean Machine Learning Library
Mizar Mathematical LibraryMizar Mathematical Library: a centrally maintained collection of formal definitions and proofs across mainstream mathematics
RemyDegenne/brownian-motionConstruction of Brownian motion; with RemyDegenne/kolmogorov_extension4
RemyDegenne/testing-lower-boundsInformation theory and hypothesis-testing bounds
YaelDillies/cam-combiCambridge Part II/III graph theory, combinatorics, extremal and probabilistic combinatorics
YellPika/quasi-borel-spacesQuasi-Borel spaces
cameronfreer/exchangeabilityExchangeability and three proofs of de Finetti's theorem
dududuguo/HighDimProbHigh-dimensional probability, random matrices, concentration
formal-applied-math/formal-mathfinMathematical finance: Black–Scholes, Itô calculus, FTAP, Girsanov
inQWIRE/QuantumLibReusable quantum-computing mathematics in Rocq/Coq: complex matrices, finite groups, subspaces, permutations, measurement and quantum operations
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
isabelle-prover/mirror-isabelleIsabelle/HOL libraries covering logic, sets, algebra, analysis, topology, number theory, probability, and foundational theories
jrh13/hol-lightHOL Light and its mathematical library: analysis, topology, geometry, algebra, number theory, and related foundational material
kkytola/ExtremeValueProjectFisher–Tippett–Gnedenko theorem
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
math-comp/analysisReal and classical analysis over Mathematical Components: topology, measure/integration, real numbers, sequences, and distributions
mrdouglasny/OSforGFFGaussian free field in d=4 and the Osterwalder–Schrader axioms
roos-j/lean-booleanfunAnalysis of Boolean functions, including Arrow's theorem

Stochastic processes 4 sources

SourceMathematical content
IBM/FormalMLGeneral probability in Rocq/Coq, including sigma-algebras, expectation, conditional expectation and martingales, with applications to stochastic approximation and reinforcement learning
RemyDegenne/brownian-motionConstruction of Brownian motion; with RemyDegenne/kolmogorov_extension4
formal-applied-math/formal-mathfinMathematical finance: Black–Scholes, Itô calculus, FTAP, Girsanov
kkytola/ExtremeValueProjectFisher–Tippett–Gnedenko theorem

Metric spaces 3 sources

SourceMathematical content
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
teorth/analysisLean companion to Tao's Analysis I

Spectral theory 4 sources

SourceMathematical content
FredRaj3/SemicircleLawWigner's semicircle law
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
oliver-butterley/SpectralThmSpectral theorem

Dynamical systems 4 sources

SourceMathematical content
girving/rayMandelbrot-set results
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
lua-vr/pointwise-birkhoffPointwise Birkhoff ergodic theorem

Partial differential equations 3 sources

SourceMathematical content
scottnarmstrong/DeGiorgiDe Giorgi–Nash–Moser theory
uda-lab/leray-hopfLeray–Hopf weak solutions of incompressible Navier–Stokes
weiran-sun/pdePDE formalizations

Statistics 4 sources

SourceMathematical content
IBM/FormalMLGeneral probability in Rocq/Coq, including sigma-algebras, expectation, conditional expectation and martingales, with applications to stochastic approximation and reinforcement learning
Lean-MoDS/StatsMLlibVerified probability, statistics, and learning theory; with Robby955/FormalSLT
LeanMachineLearning/LMLLean Machine Learning Library
or4nge19/NeuralNetworksNeural networks

Information theory 1 source

SourceMathematical content
RemyDegenne/testing-lower-boundsInformation theory and hypothesis-testing bounds

Financial mathematics 1 source

SourceMathematical content
formal-applied-math/formal-mathfinMathematical finance: Black–Scholes, Itô calculus, FTAP, Girsanov

Combinatorics

Combinatorics 27 sources

SourceMathematical content
Antoine-dSG/frieze_patternsCoxeter's frieze patterns
AxiomMath/fel-polynomialFel's conjecture on syzygies of numerical semigroups
CakeML/game-of-lifeHOL4 formalization of Conway's Game of Life and verified compilation into Life circuits, including executable semantics and circuit definitions
DhyeyMavani2003/chip-firing-with-leanChip-firing games and Riemann–Roch for graphs
Jun2M/Main-theorem-of-polytopesMain theorem of polytopes
Mizar Mathematical LibraryMizar Mathematical Library: a centrally maintained collection of formal definitions and proofs across mainstream mathematics
SamuelSchlesinger/sensitivity-conjectureHuang's proof of the sensitivity conjecture
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
YaelDillies/cam-combiCambridge Part II/III graph theory, combinatorics, extremal and probabilistic combinatorics
YaelDillies/toricToric varieties over Mathlib's schemes
agda/agda-stdlibAgda standard library: algebraic structures, orders, relations, finite structures, and data types
b-mehta/AharoniKormanDisproof of the Aharoni–Korman conjecture
celioboulay/expander-graphsExpander graphs
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
isabelle-prover/mirror-isabelleIsabelle/HOL libraries covering logic, sets, algebra, analysis, topology, number theory, probability, and foundational theories
jsm28/AperiodicMonotilesLeanFormalization of the aperiodic monotiles known as the hat and spectre
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
madvorak/vcspGeneral-valued constraint satisfaction
math-comp/math-compMathematical Components: finite structures, algebra, finite group theory, field theory, matrices, and polynomials
math-inc/FrontierMathOpen-HypergraphsFormalization of a FrontierMath open problem on hypergraphs
mitchell-horner/ErdosStoneSimonovitsKovariSosTuranErdős–Stone–Simonovits and Kővári–Sós–Turán theorems
npflueger/demazureDemazure products
rocq-community/fourcolorFour Color Theorem, including the graph theory and real analysis needed for the proof
roos-j/lean-booleanfunAnalysis of Boolean functions, including Arrow's theorem
teorth/equational_theoriesImplication graph between magma equational laws
vihdzp/combinatorial-gamesCombinatorial game theory
wwylele/PentagonalNumberTheoremEuler's pentagonal number theorem

Graph theory 12 sources

SourceMathematical content
DhyeyMavani2003/chip-firing-with-leanChip-firing games and Riemann–Roch for graphs
Ivan-Sergeyev/seymourSeymour's decomposition theorem for regular matroids
Mizar Mathematical LibraryMizar Mathematical Library: a centrally maintained collection of formal definitions and proofs across mainstream mathematics
UniMath/agda-unimathUnivalent mathematics in Agda, including extensive category theory
YaelDillies/cam-combiCambridge Part II/III graph theory, combinatorics, extremal and probabilistic combinatorics
celioboulay/expander-graphsExpander graphs
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
math-inc/FrontierMathOpen-HypergraphsFormalization of a FrontierMath open problem on hypergraphs
mitchell-horner/ErdosStoneSimonovitsKovariSosTuranErdős–Stone–Simonovits and Kővári–Sós–Turán theorems
rocq-community/fourcolorFour Color Theorem, including the graph theory and real analysis needed for the proof
vasnesterov/HadwigerNelsonHadwiger–Nelson bounds

Matroid theory 3 sources

SourceMathematical content
Ivan-Sergeyev/seymourSeymour's decomposition theorem for regular matroids
apnelson1/MatroidMatroid theory over Mathlib
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects

Enumerative combinatorics 2 sources

SourceMathematical content
Luka-O/polya-enumeration-theoremPólya enumeration theorem
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects

Additive combinatorics 4 sources

SourceMathematical content
YaelDillies/apapKelley–Meka bound on Roth numbers
leanprover-community/add-combiMathlib's additive-combinatorics sublibrary
leanprover-community/mathlib4Large formal mathematics library covering algebra, number theory, topology, analysis, measure theory, geometry, combinatorics, and many other subjects
teorth/pfrPolynomial Freiman–Ruzsa conjecture and related additive combinatorics

Game theory 2 sources

SourceMathematical content
math-xmum/gametheoryNash equilibrium via Scarf and Brouwer
vihdzp/combinatorial-gamesCombinatorial game theory

Computation and verification

Optimization 12 sources

SourceMathematical content
Lean-MoDS/StatsMLlibVerified probability, statistics, and learning theory; with Robby955/FormalSLT
LeanMachineLearning/LMLLean Machine Learning Library
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
leanprover/sosSum-of-squares tactic for nonlinear real arithmetic
lecopivo/SciLeanScientific computing
madvorak/dualityLinear-programming duality
madvorak/vcspGeneral-valued constraint satisfaction
math-xmum/gametheoryNash equilibrium via Scarf and Brouwer
nasa/pvslibNASALib: PVS formalizations spanning algebra, analysis, geometry, numerical methods, decision procedures, and applications
optsuite/optlibOptimization algorithms and convergence proofs
or4nge19/NeuralNetworksNeural networks
verified-optimization/CvxLeanConvex optimization modeling

Numerical analysis 6 sources

SourceMathematical content
alerad/leancertVerified interval arithmetic: bounds on exp, sin, cos; root finding
girving/intervalVerified floating-point interval arithmetic
josephmckinsey/FleanFloating-point numbers, replacing Mathlib.Data.FP; with Beneficial-AI-Foundation/FloatSpec
lecopivo/LeanBLASBLAS bindings and specification
lecopivo/SciLeanScientific computing
nasa/pvslibNASALib: PVS formalizations spanning algebra, analysis, geometry, numerical methods, decision procedures, and applications

Scientific computing 4 sources

SourceMathematical content
leanprover/TensorLibVerified tensor library
lecopivo/SciLeanScientific computing
or4nge19/NeuralNetworksNeural networks
todbeibrot/Lean-OscarInterface between Lean 4 and the OSCAR computer-algebra system

Quantum information 6 sources

SourceMathematical content
Hayata-Yamasaki-Group/lean-quantumQuantum information and computation; with inQWIRE/quantumlib
LionSR/TNLeanTensor networks: fundamental theorem of matrix product states, canonical forms
Timeroot/Lean-QuantumInfoQuantum information theory
inQWIRE/QuantumLibReusable quantum-computing mathematics in Rocq/Coq: complex matrices, finite groups, subspaces, permutations, measurement and quantum operations
leanprover-community/physlibFormalized mathematical physics in Lean, including Riemannian and pseudo-Riemannian geometry, tensor calculus, relativity, distributions, Lie groups, crystal lattices, topological field theory, and lattice quantum…
thery/SelingerLaurent Théry's formalization of Selinger's quantum-gate synthesis proof, combining number-theoretic and linear-algebraic definitions over Mathematical Components

Mathematical physics 3 sources

SourceMathematical content
LionSR/TNLeanTensor networks: fundamental theorem of matrix product states, canonical forms
leanprover-community/physlibFormalized mathematical physics in Lean, including Riemannian and pseudo-Riemannian geometry, tensor calculus, relativity, distributions, Lie groups, crystal lattices, topological field theory, and lattice quantum…
mrdouglasny/OSforGFFGaussian free field in d=4 and the Osterwalder–Schrader axioms

Semantics of programming languages and systems 19 sources

SourceMathematical content
AbsInt/CompCertFormal definitions of C and assembly semantics, memory models and compiler passes, plus the correctness proofs of CompCert
CakeML/cakemlHOL4 definitions of CakeML syntax and semantics, compiler/intermediate languages, type systems and the verified compiler proofs
CakeML/candleFormal definitions and proofs for Candle, a verified implementation of HOL Light developed within CakeML
CakeML/game-of-lifeHOL4 formalization of Conway's Game of Life and verified compilation into Life circuits, including executable semantics and circuit definitions
HOL-Theorem-Prover/HOLHOL4 libraries covering higher-order logic, algebra, analysis, semantics, and large formal developments
HOLMS-lib/HOLMSHOL Light Library for Modal Systems: Kripke semantics, normal modal logics, labelled calculi, completeness and verified proof search
SRI-CSL/PVSPVS and its standard libraries, including the formal definitions used by NASALib
Verified-zkEVM/PolyFunPolynomial functors and interaction trees
acl2/acl2ACL2 Community Books: arithmetic, algebra, data structures, formal models of hardware and software, verified algorithms, and reusable definitions
codyroux/traat-leanSelected lemmas from Term Rewriting and All That
formal-land/rocq-of-rustFormal definitions of Rust types, traits, integer operations, and control flow in Rocq, used to verify Rust programs
iris/irisIris higher-order concurrent separation logic and program logic, including ghost-state constructions and proof automation
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
kth-step/HOL4P4HOL4 formal syntax, small-step semantics, type system, architecture models and symbolic execution for the P4 language
leanprover-community/iris-leanIris separation logic port
nasa/pvslibNASALib: PVS formalizations spanning algebra, analysis, geometry, numerical methods, decision procedures, and applications
seL4/l4vIsabelle/HOL formal specifications and proofs for seL4, with reusable theories for machine words, state monads, separation logic, refinement, and program verification
standardml/twelfTwelf/LF examples and case studies: lambda calculi, Cartesian closed categories, Church–Rosser, cut elimination, Mini-ML, logic programming and metatheory
uwplse/verdiFormal models and proofs for distributed systems, including reusable definitions for verified distributed algorithms

Programming languages 13 sources

SourceMathematical content
AbsInt/CompCertFormal definitions of C and assembly semantics, memory models and compiler passes, plus the correctness proofs of CompCert
CakeML/cakemlHOL4 definitions of CakeML syntax and semantics, compiler/intermediate languages, type systems and the verified compiler proofs
CakeML/candleFormal definitions and proofs for Candle, a verified implementation of HOL Light developed within CakeML
HOL-Theorem-Prover/HOLHOL4 libraries covering higher-order logic, algebra, analysis, semantics, and large formal developments
formal-land/rocq-of-rustFormal definitions of Rust types, traits, integer operations, and control flow in Rocq, used to verify Rust programs
iris/irisIris higher-order concurrent separation logic and program logic, including ghost-state constructions and proof automation
iris/stdppGeneral-purpose Rocq definitions for data structures, finite maps, and algebra, used by Iris and independently reusable
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
kth-step/HOL4P4HOL4 formal syntax, small-step semantics, type system, architecture models and symbolic execution for the P4 language
leanprover/cslibComputer science library
seL4/l4vIsabelle/HOL formal specifications and proofs for seL4, with reusable theories for machine words, state monads, separation logic, refinement, and program verification
standardml/twelfTwelf/LF examples and case studies: lambda calculi, Cartesian closed categories, Church–Rosser, cut elimination, Mini-ML, logic programming and metatheory
uwplse/verdiFormal models and proofs for distributed systems, including reusable definitions for verified distributed algorithms

Program verification 28 sources

SourceMathematical content
AbsInt/CompCertFormal definitions of C and assembly semantics, memory models and compiler passes, plus the correctness proofs of CompCert
CakeML/cakemlHOL4 definitions of CakeML syntax and semantics, compiler/intermediate languages, type systems and the verified compiler proofs
CakeML/candleFormal definitions and proofs for Candle, a verified implementation of HOL Light developed within CakeML
CakeML/game-of-lifeHOL4 formalization of Conway's Game of Life and verified compilation into Life circuits, including executable semantics and circuit definitions
GasStationManager/ArtificialAlgorithmsVerified algorithms implemented and proved by AIs
HOL-Theorem-Prover/HOLHOL4 libraries covering higher-order logic, algebra, analysis, semantics, and large formal developments
SRI-CSL/PVSPVS and its standard libraries, including the formal definitions used by NASALib
acl2/acl2ACL2 Community Books: arithmetic, algebra, data structures, formal models of hardware and software, verified algorithms, and reusable definitions
alerad/leancertVerified interval arithmetic: bounds on exp, sin, cos; root finding
astrainfinita/AlgorithmVerified efficient algorithms
b-mehta/PrimeCertFormal prime certificates
digama0/mm0Metamath Zero/One formal specifications and examples, including arithmetic and metatheory
formal-land/rocq-of-rustFormal definitions of Rust types, traits, integer operations, and control flow in Rocq, used to verify Rust programs
girving/intervalVerified floating-point interval arithmetic
hanwenzhu/miller-rabinMiller–Rabin primality test
iris/irisIris higher-order concurrent separation logic and program logic, including ghost-state constructions and proof automation
iris/stdppGeneral-purpose Rocq definitions for data structures, finite maps, and algebra, used by Iris and independently reusable
isabelle-prover/mirror-afp-develArchive of Formal Proofs (AFP): a large Isabelle library spanning pure mathematics, algorithms, semantics, verification, and scientific applications
josephmckinsey/FleanFloating-point numbers, replacing Mathlib.Data.FP; with Beneficial-AI-Foundation/FloatSpec
kth-step/HOL4P4HOL4 formal syntax, small-step semantics, type system, architecture models and symbolic execution for the P4 language
leanprover-community/iris-leanIris separation logic port
leanprover/cslibComputer science library
leanprover/hex-lllVerified LLL lattice-basis reduction with a proved short-vector bound; a companion library proves correspondence with Mathlib's lattice definitions
nasa/pvslibNASALib: PVS formalizations spanning algebra, analysis, geometry, numerical methods, decision procedures, and applications
seL4/l4vIsabelle/HOL formal specifications and proofs for seL4, with reusable theories for machine words, state monads, separation logic, refinement, and program verification
thery/coqprimeNumber theory, elliptic curves, modular arithmetic, and primality certification
ufmg-smite/lean-smtAutomated proof tactics using satisfiability-modulo-theories solvers
uwplse/verdiFormal models and proofs for distributed systems, including reusable definitions for verified distributed algorithms

Computer algebra 7 sources

SourceMathematical content
Hagb/lean-groebnerGröbner bases, independent development
JJYYY-JJY/lean-normal-formsExecutable Hermite and Smith normal forms over Euclidean domains, with proofs relating them to Mathlib's definitions
Verified-zkEVM/CompPolyComputable polynomials
WuProver/groebner_projGröbner basis theory; companions WuProver/MonomialOrderedPolynomial and WuProver/GroebnerTactic
acl2/acl2ACL2 Community Books: arithmetic, algebra, data structures, formal models of hardware and software, verified algorithms, and reusable definitions
leanprover/hex-lllVerified LLL lattice-basis reduction with a proved short-vector bound; a companion library proves correspondence with Mathlib's lattice definitions
todbeibrot/Lean-OscarInterface between Lean 4 and the OSCAR computer-algebra system

Automata theory 3 sources

SourceMathematical content
ctchou/AutomataTheoryAutomata theory
madvorak/chomskyChomsky hierarchy and formal grammars
shetzl/autthAutomata theory

Formal language theory 1 source

SourceMathematical content
madvorak/chomskyChomsky hierarchy and formal grammars