Repositories list

• batteries

  Public
  The "batteries included" extended library for the Lean programming language and theorem prover

  leanlean4

  leanlean4

  Lean

  •

  Apache License 2.0

  •139•369•28•48•Updated Mar 22, 2026Mar 22, 2026

• mathlib4-nightly-testing

  Public
  nightly-testing and lean-pr-testing branches of Mathlib

  Lean

  •

  Apache License 2.0

  •1.2k•1•0•18•Updated Mar 22, 2026Mar 22, 2026

• blog

  Public
  Source for the community blog

  Python

  •28•8•4•3•Updated Mar 22, 2026Mar 22, 2026

• mathlib4

  Public
  The math library of Lean 4

  lean4

  lean4

  Lean

  •

  Apache License 2.0

  •1.2k•3k•269•2.3k•Updated Mar 22, 2026Mar 22, 2026

• mathlib-changelog

  Public

  leanprover-community/mathlib-changelog’s past year of commit activity
  Lean

  •

  MIT License

  •0•14•3•0•Updated Mar 22, 2026Mar 22, 2026

• leanprover-community.github.io

  Public
  Hosts the website for mathlib and other Lean community infrastructure.

  CSS

  •

  MIT License

  •174•75•18•7•Updated Mar 22, 2026Mar 22, 2026

• mathlib_stats

  Public

  leanprover-community/mathlib_stats’s past year of commit activity
  Display gitstats output on the mathlib website

  Python

  •6•2•0•0•Updated Mar 22, 2026Mar 22, 2026

• lean4game

  Public

  leanprover-community/lean4game’s past year of commit activity
  Server to host Lean games

  reactlean4

  reactlean4

  TypeScript

  •

  GNU General Public License v3.0

  •78•427•112•12•Updated Mar 22, 2026Mar 22, 2026

• physlib

  Public

  leanprover-community/physlib’s past year of commit activity
  A project to digitalise results from physics into Lean.

  physicstheorem-provinglean

  physicstheorem-provinglean

  Lean

  •

  Apache License 2.0

  •84•521•60•13•Updated Mar 21, 2026Mar 21, 2026

• SpliceBot

  Public

  leanprover-community/SpliceBot’s past year of commit activity
  JavaScript

  •

  MIT License

  •3•0•3•3•Updated Mar 21, 2026Mar 21, 2026

• SpliceBot-testing-fork

  Public
  MIT License

  •3•0•0•0•Updated Mar 21, 2026Mar 21, 2026

• privilege-escalation-bridge

  Public
  TypeScript

  •

  Apache License 2.0

  •0•0•0•0•Updated Mar 20, 2026Mar 20, 2026

• ProofWidgets4

  Public
  Helper toolkit for creating your own Lean 4 UserWidgets

  visualizationleanlean4

  visualizationleanlean4

  Lean

  •

  Apache License 2.0

  •44•192•13•0•Updated Mar 19, 2026Mar 19, 2026

• iris-lean

  Public
  Lean 4 port of Iris, a higher-order concurrent separation logic framework

  Lean

  •

  Apache License 2.0

  •31•163•15•16•Updated Mar 19, 2026Mar 19, 2026

• lean4web

  Public

  leanprover-community/lean4web’s past year of commit activity
  Lean web editor

  lean4

  lean4

  TypeScript

  •

  Apache License 2.0

  •50•133•6•5•Updated Mar 18, 2026Mar 18, 2026

• LeanProject

  Public template
  A template for blueprint-driven formalization projects in Lean.

  theorem-provingmathematicsproof-assistant+ 8

  theorem-provingmathematicsproof-assistantformal-mathematicsmathematical-programminglean-theorem-proverlean4formalisation-mathematicslean-blueprintformalised-mathematics+ 1

  Python

  •

  Apache License 2.0

  •15•103•1•0•Updated Mar 18, 2026Mar 18, 2026

• mathlib4_copy

  Public
  A fork of the mathlib4 repo with CI disabled

  Lean

  •

  Apache License 2.0

  •1.2k•0•0•0•Updated Mar 18, 2026Mar 18, 2026

• upstreaming-dashboard-action

  Public
  Action to generate an "upstreaming dashboard" for Lean projects

  JavaScript

  •0•3•0•0•Updated Mar 18, 2026Mar 18, 2026

• aesop

  Public
  White-box automation for Lean 4

  lean4

  lean4

  Lean

  •

  Apache License 2.0

  •50•345•37•6•Updated Mar 18, 2026Mar 18, 2026

• queueboard-core

  Public
  testing a split of code and data for the queueboard

  Python

  •

  Apache License 2.0

  •7•2•25•0•Updated Mar 18, 2026Mar 18, 2026

• mathlib-ci

  Public
  Scripts and utilities to support the mathlib repository's CI/CD operations

  Shell

  •

  Apache License 2.0

  •1•2•0•1•Updated Mar 16, 2026Mar 16, 2026

• NNG4

  Public
  Natural Number Game

  lean4

  lean4

  Lean

  •

  Apache License 2.0

  •67•296•26•3•Updated Mar 16, 2026Mar 16, 2026

• queueboard

  Public
  0•0•0•0•Updated Mar 15, 2026Mar 15, 2026

• queueboard-archive2

  Public
  AspectJ

  •

  Apache License 2.0

  •0•0•0•0•Updated Mar 14, 2026Mar 14, 2026

• flt-regular

  Public
  Fermat's Last Theorem for regular primes

  Lean

  •

  Apache License 2.0

  •3•62•0•0•Updated Mar 13, 2026Mar 13, 2026

• sphere-eversion

  Public
  Formalization of the existence of sphere eversions

  Lean

  •

  Apache License 2.0

  •14•47•0•2•Updated Mar 11, 2026Mar 11, 2026

• azure-scripts

  Public
  scripts and cron jobs for Azure

  Python

  •5•1•0•0•Updated Mar 10, 2026Mar 10, 2026

• repl

  Public
  A simple REPL for Lean 4, returning information about errors and sorries.

  Lean

  •

  Apache License 2.0

  •65•194•25•19•Updated Mar 10, 2026Mar 10, 2026

• plausible

  Public
  Lean

  •

  Apache License 2.0

  •19•83•0•7•Updated Mar 10, 2026Mar 10, 2026

• import-graph

  Public
  Tool to analyse the import structure of lean projects.

  lean4

  lean4

  Lean

  •

  Apache License 2.0

  •13•19•4•0•Updated Mar 10, 2026Mar 10, 2026