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    95 repositories

    • mathlib4-nightly-testing

      Public
      nightly-testing and lean-pr-testing branches of Mathlib
      Lean
      •
      Apache License 2.0
      •1.2k•1•0•20•Updated Apr 3, 2026Apr 3, 2026

    • 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•54•Updated Apr 3, 2026Apr 3, 2026

    • LeanProject

      Public template
      A template for blueprint-driven formalization projects in Lean.
      theorem-provingmathematicsproof-assistant
      theorem-provingmathematicsproof-assistantformal-mathematicsmathematical-programminglean-theorem-proverlean4formalisation-mathematicslean-blueprintformalised-mathematics
      Python
      •
      Apache License 2.0
      •15•103•1•0•Updated Apr 3, 2026Apr 3, 2026

    • blog

      Public
      Source for the community blog
      Python
      •28•9•4•3•Updated Apr 3, 2026Apr 3, 2026

    • mathlib4

      Public
      The math library of Lean 4
      lean4
      lean4
      Lean
      •
      Apache License 2.0
      •1.2k•3.1k•269•2.3k•Updated Apr 3, 2026Apr 3, 2026

    • physlib

      Public
      A project to digitalise results from physics into Lean.
      physicstheorem-provinglean
      physicstheorem-provinglean
      Lean
      •
      Apache License 2.0
      •88•535•60•14•Updated Apr 3, 2026Apr 3, 2026

    • bors-ng

      Public
      👁 A merge bot for GitHub Pull Requests
      Elixir
      •
      Apache License 2.0
      •184•2•0•0•Updated Apr 3, 2026Apr 3, 2026

    • leanprover-community.github.io

      Public
      Hosts the website for mathlib and other Lean community infrastructure.
      CSS
      •
      MIT License
      •174•75•18•7•Updated Apr 3, 2026Apr 3, 2026

    • mathlib_stats

      Public
      Display gitstats output on the mathlib website
      Python
      •6•2•0•0•Updated Apr 3, 2026Apr 3, 2026

    • hopscotch

      Public
      hopscotch is an interactive validation tool to assist in keeping your Lean dependencies up to date
      Lean
      •
      Apache License 2.0
      •0•2•0•0•Updated Apr 3, 2026Apr 3, 2026

    • ProofWidgets4

      Public
      Helper toolkit for creating your own Lean 4 UserWidgets
      visualizationleanlean4
      visualizationleanlean4
      Lean
      •
      Apache License 2.0
      •44•195•13•1•Updated Apr 3, 2026Apr 3, 2026

    • lean-auto

      Public
      Experiments on automation for Lean
      Lean
      •
      Apache License 2.0
      •27•165•10•0•Updated Apr 2, 2026Apr 2, 2026

    • aesop

      Public
      White-box automation for Lean 4
      lean4
      lean4
      Lean
      •
      Apache License 2.0
      •50•348•37•6•Updated Apr 2, 2026Apr 2, 2026

    • quote4

      Public
      Intuitive, type-safe expression quotations for Lean 4.
      lean4
      lean4
      Lean
      •
      Apache License 2.0
      •20•102•17•9•Updated Apr 2, 2026Apr 2, 2026

    • plausible

      Public
      Lean
      •
      Apache License 2.0
      •18•85•0•6•Updated Apr 2, 2026Apr 2, 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 Apr 2, 2026Apr 2, 2026

    • iris-lean

      Public
      Lean 4 port of Iris, a higher-order concurrent separation logic framework
      Lean
      •
      Apache License 2.0
      •32•166•16•16•Updated Apr 2, 2026Apr 2, 2026

    • queueboard

      Public
      0•0•0•0•Updated Apr 2, 2026Apr 2, 2026

    • queueboard-core

      Public
      testing a split of code and data for the queueboard
      Python
      •
      Apache License 2.0
      •8•2•25•1•Updated Apr 2, 2026Apr 2, 2026

    • mathlib4_copy

      Public
      A fork of the mathlib4 repo with CI disabled
      Lean
      •
      Apache License 2.0
      •1.2k•0•0•0•Updated Apr 2, 2026Apr 2, 2026

    • flt-regular

      Public
      Fermat's Last Theorem for regular primes
      Lean
      •
      Apache License 2.0
      •3•62•0•0•Updated Apr 2, 2026Apr 2, 2026

    • bundle

      Public
      Create self-contained Lean 4 bundles for offline use
      Python
      •
      Apache License 2.0
      •0•1•0•0•Updated Apr 2, 2026Apr 2, 2026

    • mathlib-ci

      Public
      Scripts and utilities to support the mathlib repository's CI/CD operations
      Shell
      •
      Apache License 2.0
      •2•2•0•1•Updated Apr 2, 2026Apr 2, 2026

    • duper

      Public
      lean4
      lean4
      Lean
      •
      Apache License 2.0
      •13•107•1•0•Updated Apr 2, 2026Apr 2, 2026

    • mathlib-changelog

      Public
      Lean
      •
      MIT License
      •0•15•3•2•Updated Apr 1, 2026Apr 1, 2026

    • lean4game

      Public
      Server to host Lean games
      reactlean4
      reactlean4
      TypeScript
      •
      GNU General Public License v3.0
      •81•432•107•11•Updated Apr 1, 2026Apr 1, 2026

    • repl

      Public
      A simple REPL for Lean 4, returning information about errors and sorries.
      Lean
      •
      Apache License 2.0
      •66•194•25•19•Updated Mar 31, 2026Mar 31, 2026

    • sphere-eversion

      Public
      Formalization of the existence of sphere eversions
      Lean
      •
      Apache License 2.0
      •14•47•0•2•Updated Mar 30, 2026Mar 30, 2026

    • logic_and_proof

      Public
      TeX
      •
      Apache License 2.0
      •5•15•3•1•Updated Mar 25, 2026Mar 25, 2026

    • SpliceBot

      Public
      JavaScript
      •
      MIT License
      •3•0•3•3•Updated Mar 21, 2026Mar 21, 2026
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