This is the repository for Lean 4.

About

• Quickstart
• Homepage
• Theorem Proving Tutorial
• Functional Programming in Lean
• Documentation Overview
• Language Reference
• 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 (documentation source: doc/make/index.md).