<p align=center><a href="https://leanprover.github.io"><img src="https://leanprover.github.io/images/lean_logo.svg" alt="logo" width="300px"/></a></p>
<table>
  <tr>
    <th>License</th><th>Windows</th><th>Linux / macOS</th><th>Test Coverage</th><th>Chat</th>
  </tr>
  <tr>
    <td><a href="LICENSE"><img src="https://img.shields.io/badge/license-APACHE_2-green.svg?dummy" title="License"/></a></td>
    <td><a href="https://ci.appveyor.com/project/leodemoura/lean/branch/lean4"><img src="https://ci.appveyor.com/api/projects/status/lush6vyy1m0qg6vc/branch/lean4"/></a></td>
    <td><a href="https://travis-ci.org/leanprover/lean/branches"><img src="https://travis-ci.org/leanprover/lean.png?branch=lean4"/></a></td>
    <td><a href="https://codecov.io/gh/leanprover/lean/branch/lean4"><img src="https://codecov.io/gh/leanprover/lean/branch/lean4/graph/badge.svg" alt="Codecov"/></a></td>
    <td><a href="https://leanprover.zulipchat.com"><img src="https://img.shields.io/badge/zulip-join_chat-brightgreen.svg" alt="Join the Zulip chat"/></a></td>
  </tr>
</table>

About
-----

- [Homepage](http://leanprover.github.io)
- [Theorem Proving in Lean](https://leanprover.github.io/theorem_proving_in_lean/index.html)
- [Core library](library/library.md)
- [Change Log](doc/changes.md)
- [FAQ](doc/faq.md)
- For HoTT mode, please use [Lean2](https://github.com/leanprover/lean2).

Installation
------------

Stable and nightly binary releases of Lean are available on the [homepage](https://leanprover.github.io/download/). For building Lean from source, see the [build instructions](doc/make/index.md).

Miscellaneous
-------------

- Building Doxygen Documentation: `doxygen src/Doxyfile`
- [Coding Style](doc/coding_style.md)
- [Library Style Conventions](doc/lean/library_style.org)
- [Git Commit Conventions](doc/commit_convention.md)
- [Automatic Builds](doc/make/travis.md)
- [Syntax Highlight Lean Code in LaTeX](doc/syntax_highlight_in_latex.md)
- [Exporting, and reference type-checkers](doc/export_format.md)

Roadmap
-------------

- [Open RFC issues](https://github.com/leanprover/lean/issues?q=is%3Aissue+is%3Aopen+label%3ARFC)
- [Features](https://github.com/leanprover/lean/issues?q=is%3Aissue+is%3Aopen+label%3AFeature)
- [Wish list](https://github.com/leanprover/lean/issues?q=is%3Aissue+is%3Aopen+label%3AI-wishlist)
- [High priority issues](https://github.com/leanprover/lean/issues?q=is%3Aissue+is%3Aopen+label%3AP-high)
- [Medium priority issues](https://github.com/leanprover/lean/issues?q=is%3Aissue+is%3Aopen+label%3AP-medium)
