Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
If the `LEAN_GITHASH` environment variable is set, Lake will now use it instead of the detected Lean's githash when computing traces for builds and the elaborated Lake configuration. This override allows one to replace the Lean version used by a library (e.g., Mathlib) without completely rebuilding it, which is useful for testing custom builds of Lean. |
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| nix | ||
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| src | ||
| stage0 | ||
| tests | ||
| .gitattributes | ||
| .gitignore | ||
| .ignore | ||
| CMakeLists.txt | ||
| CODEOWNERS | ||
| CONTRIBUTING.md | ||
| default.nix | ||
| flake.lock | ||
| flake.nix | ||
| lean-toolchain | ||
| lean.code-workspace | ||
| LICENSE | ||
| LICENSES | ||
| README.md | ||
| RELEASES.md | ||
| shell.nix | ||
This is the repository for Lean 4.
About
- Quickstart
- Homepage
- Theorem Proving Tutorial
- Functional Programming in Lean
- Manual
- Release notes starting at v4.0.0-m3
- Examples
- External Contribution Guidelines
- FAQ
Installation
See Setting Up Lean.
Contributing
Please read our Contribution Guidelines first.
Building from Source
See Building Lean.