This is the repository for Lean 4.
We provide nightly releases and have just begun regular stable point releases.
- 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
See Setting Up Lean.
Please read our Contribution Guidelines first.
See Building Lean.