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    78 repositories

    • mathlib4

      Public
      The math library of Lean 4
      lean4
      Lean
      •
      Apache License 2.0
      •576•2.1k•270•1.6k•Updated Jun 26, 2025Jun 26, 2025

    • queueboard

      Public
      Mathlib4 review and triage dashboard
      Python
      •
      Apache License 2.0
      •9•8•27•3•Updated Jun 26, 2025Jun 26, 2025

    • mathlib4-nightly-testing

      Public
      nightly-testing and lean-pr-testing branches of Mathlib
      Lean
      •
      Apache License 2.0
      •576•0•0•0•Updated Jun 26, 2025Jun 26, 2025

    • lean4-mode

      Public
      Emacs major mode for Lean 4
      emacslean4
      Emacs Lisp
      •
      Apache License 2.0
      •32•95•22•3•Updated Jun 26, 2025Jun 26, 2025

    • blog

      Public
      Source for the community blog
      Python
      •23•7•4•9•Updated Jun 26, 2025Jun 26, 2025

    • batteries

      Public
      The "batteries included" extended library for the Lean programming language and theorem prover
      leanlean4
      Lean
      •
      Apache License 2.0
      •120•312•24•58•Updated Jun 25, 2025Jun 25, 2025

    • iris-lean

      Public
      Lean 4 port of Iris, a higher-order concurrent separation logic framework
      Lean
      •
      Apache License 2.0
      •12•102•20•18•Updated Jun 25, 2025Jun 25, 2025

    • leanprover-community.github.io

      Public
      Hosts the website for mathlib and other Lean community infrastructure.
      CSS
      •
      MIT License
      •149•63•18•9•Updated Jun 25, 2025Jun 25, 2025

    • mathlib_stats

      Public
      Display gitstats output on the mathlib website
      Python
      •6•2•0•0•Updated Jun 25, 2025Jun 25, 2025

    • lean4game

      Public
      Server to host lean games.
      reactlean4
      TypeScript
      •
      GNU General Public License v3.0
      •47•279•94•7•Updated Jun 24, 2025Jun 24, 2025

    • aesop

      Public
      White-box automation for Lean 4
      lean4
      Lean
      •
      Apache License 2.0
      •33•278•36•1•Updated Jun 24, 2025Jun 24, 2025

    • quote4

      Public
      Intuitive, type-safe expression quotations for Lean 4.
      lean4
      Lean
      •
      Apache License 2.0
      •14•87•14•6•Updated Jun 23, 2025Jun 23, 2025

    • flt-regular

      Public
      Fermat's Last Theorem for regular primes
      Lean
      •
      Apache License 2.0
      •3•61•0•0•Updated Jun 23, 2025Jun 23, 2025

    • lean4web

      Public
      The Lean 4 web editor
      lean4
      TypeScript
      •
      Apache License 2.0
      •34•95•7•3•Updated Jun 21, 2025Jun 21, 2025

    • docgen-action

      Public
      Action to generate Lean documentation pages
      JavaScript
      •0•0•0•0•Updated Jun 20, 2025Jun 20, 2025

    • lint-style-action

      Public
      Mathlib style linter
      0•1•0•0•Updated Jun 20, 2025Jun 20, 2025

    • azure-scripts

      Public
      scripts and cron jobs for Azure
      Python
      •5•1•0•0•Updated Jun 19, 2025Jun 19, 2025

    • lean-auto

      Public
      Experiments in automation for Lean
      Lean
      •
      Apache License 2.0
      •19•115•8•2•Updated Jun 19, 2025Jun 19, 2025

    • con-nf

      Public
      A formal consistency proof of Quine's set theory New Foundations
      set-theorylean4new-foundations
      Lean
      •
      Apache License 2.0
      •8•72•1•0•Updated Jun 18, 2025Jun 18, 2025

    • lean-release-tag

      Public
      Action that creates a Git tag when updating to a new Lean release.
      Shell
      •0•0•1•0•Updated Jun 18, 2025Jun 18, 2025

    • mathlib-update-action

      Public
      Action for automatically updating to Mathlib releases
      JavaScript
      •
      MIT License
      •0•1•0•0•Updated Jun 18, 2025Jun 18, 2025

    • duper

      Public
      lean4
      Lean
      •
      Apache License 2.0
      •12•81•0•1•Updated Jun 12, 2025Jun 12, 2025

    • sphere-eversion

      Public
      Formalization of the existence of sphere eversions
      Lean
      •
      Apache License 2.0
      •15•43•0•0•Updated Jun 10, 2025Jun 10, 2025

    • import-graph

      Public
      Tool to analyse the import structure of lean projects.
      lean4
      Lean
      •
      Apache License 2.0
      •12•14•2•1•Updated Jun 5, 2025Jun 5, 2025

    • repl

      Public
      A simple REPL for Lean 4, returning information about errors and sorries.
      Lean
      •55•132•20•14•Updated Jun 4, 2025Jun 4, 2025

    • ProofWidgets4

      Public
      Helper toolkit for creating your own Lean 4 UserWidgets
      leanlean4visualization
      Lean
      •
      Apache License 2.0
      •39•144•13•0•Updated Jun 4, 2025Jun 4, 2025

    • plausible

      Public
      Lean
      •
      Apache License 2.0
      •8•46•1•2•Updated Jun 4, 2025Jun 4, 2025

    • tutorials4

      Public
      Lean 4 tutorial files
      Lean
      •
      Apache License 2.0
      •8•39•0•1•Updated Jun 3, 2025Jun 3, 2025

    • mathematics_in_lean

      Public
      The user home repository for the Mathematics in Lean tutorial.
      HTML
      •259•373•0•0•Updated Jun 3, 2025Jun 3, 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
      •6•23•3•0•Updated May 26, 2025May 26, 2025