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    83 repositories

    • queueboard

      Public
      AspectJ
      •
      Apache License 2.0
      •0•0•0•3•Updated Jan 7, 2026Jan 7, 2026

    • blog

      Public
      Source for the community blog
      Python
      •26•7•4•4•Updated Jan 7, 2026Jan 7, 2026

    • mathlib4

      Public
      The math library of Lean 4
      lean4
      Lean
      •
      Apache License 2.0
      •981•2.7k•260•2k•Updated Jan 7, 2026Jan 7, 2026

    • mathlib-changelog

      Public
      Lean
      •
      MIT License
      •0•12•3•0•Updated Jan 7, 2026Jan 7, 2026

    • mathlib4-nightly-testing

      Public
      nightly-testing and lean-pr-testing branches of Mathlib
      Lean
      •
      Apache License 2.0
      •981•0•0•10•Updated Jan 7, 2026Jan 7, 2026

    • mathlib_stats

      Public
      Display gitstats output on the mathlib website
      Python
      •6•2•0•0•Updated Jan 7, 2026Jan 7, 2026

    • batteries

      Public
      The "batteries included" extended library for the Lean programming language and theorem prover
      leanlean4
      Lean
      •
      Apache License 2.0
      •131•354•27•45•Updated Jan 7, 2026Jan 7, 2026

    • lean4game

      Public
      Server to host lean games.
      reactlean4
      TypeScript
      •
      GNU General Public License v3.0
      •68•376•104•10•Updated Jan 6, 2026Jan 6, 2026

    • lean4web

      Public
      Lean web editor
      lean4
      TypeScript
      •
      Apache License 2.0
      •46•126•7•5•Updated Jan 6, 2026Jan 6, 2026

    • flt-regular

      Public
      Fermat's Last Theorem for regular primes
      Lean
      •
      Apache License 2.0
      •3•61•0•0•Updated Jan 6, 2026Jan 6, 2026

    • leanprover-community.github.io

      Public
      Hosts the website for mathlib and other Lean community infrastructure.
      CSS
      •
      MIT License
      •169•70•18•6•Updated Jan 6, 2026Jan 6, 2026

    • azure-scripts

      Public
      scripts and cron jobs for Azure
      Python
      •5•1•0•0•Updated Jan 6, 2026Jan 6, 2026

    • aesop

      Public
      White-box automation for Lean 4
      lean4
      Lean
      •
      Apache License 2.0
      •46•329•37•2•Updated Jan 5, 2026Jan 5, 2026

    • docgen-action

      Public
      Action to generate Lean documentation pages
      JavaScript
      •4•4•7•2•Updated Jan 4, 2026Jan 4, 2026

    • lean-auto

      Public
      Experiments on automation for Lean
      Lean
      •
      Apache License 2.0
      •24•152•10•0•Updated Jan 3, 2026Jan 3, 2026

    • queueboard-core

      Public
      testing a split of code and data for the queueboard
      Python
      •
      Apache License 2.0
      •6•2•25•2•Updated Jan 1, 2026Jan 1, 2026

    • iris-lean

      Public
      Lean 4 port of Iris, a higher-order concurrent separation logic framework
      Lean
      •
      Apache License 2.0
      •26•136•22•17•Updated Jan 1, 2026Jan 1, 2026

    • mathlib-manual

      Public
      Lean
      •
      Apache License 2.0
      •47•1•0•0•Updated Dec 28, 2025Dec 28, 2025

    • NNG4

      Public
      Natural Number Game
      lean4
      Lean
      •
      Apache License 2.0
      •56•273•26•3•Updated Dec 27, 2025Dec 27, 2025

    • mathlib4_docs

      Public
      lean4
      5•9•0•0•Updated Dec 25, 2025Dec 25, 2025

    • ProofWidgets4

      Public
      Helper toolkit for creating your own Lean 4 UserWidgets
      visualizationleanlean4
      Lean
      •
      Apache License 2.0
      •42•172•13•1•Updated Dec 23, 2025Dec 23, 2025

    • sphere-eversion

      Public
      Formalization of the existence of sphere eversions
      Lean
      •
      Apache License 2.0
      •14•46•0•1•Updated Dec 16, 2025Dec 16, 2025

    • plausible

      Public
      Lean
      •
      Apache License 2.0
      •17•74•0•7•Updated Dec 16, 2025Dec 16, 2025

    • quote4

      Public
      Intuitive, type-safe expression quotations for Lean 4.
      lean4
      Lean
      •
      Apache License 2.0
      •19•101•16•8•Updated Dec 16, 2025Dec 16, 2025

    • import-graph

      Public
      Tool to analyse the import structure of lean projects.
      lean4
      Lean
      •
      Apache License 2.0
      •13•16•2•0•Updated Dec 16, 2025Dec 16, 2025

    • LeanSearchClient

      Public
      Syntax for searching with natural language from Lean, using https://leansearch.net/ (may extend to other services)
      Lean
      •
      Apache License 2.0
      •7•27•4•1•Updated Dec 16, 2025Dec 16, 2025

    • repl

      Public
      A simple REPL for Lean 4, returning information about errors and sorries.
      Lean
      •
      Apache License 2.0
      •64•177•25•18•Updated Dec 14, 2025Dec 14, 2025

    • duper

      Public
      lean4
      Lean
      •
      Apache License 2.0
      •12•97•1•0•Updated Dec 14, 2025Dec 14, 2025

    • hammer-bench

      Public
      Benchmark suite for hammer tactics
      Python
      •0•0•0•0•Updated Dec 9, 2025Dec 9, 2025

    • lean-update

      Public
      GitHub Action which automatically updates Lean projects
      github-actionslean4
      JavaScript
      •
      MIT License
      •5•5•5•0•Updated Dec 7, 2025Dec 7, 2025