Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
Cloud releases will now properly be re-unpacked if the build directory is removed. This fixes [an issue reported on Zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Some.20files.20not.20found.20in.20the.20cache/near/402921424) with the new `.lake` directory that broke Mathlib's ProofWidgets cache. |
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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 | ||
| LICENSE | ||
| LICENSES | ||
| README.md | ||
| RELEASES.md | ||
| shell.nix | ||
This is the repository for Lean 4.
We provide nightly releases and have just begun regular stable point releases.
About
- Quickstart
- Walkthrough installation video
- Quick tour video
- 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.