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lean4

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Lean is a functional programming language that makes it easy to write correct

and maintainable code. You can also use Lean as an interactive theorem prover.

Lean programming primarily involves defining types and functions. This allows

your focus to remain on the problem domain and manipulating its data, rather

than the details of programming.

Here are 18 public repositories matching this topic...

The Role of Thoughts: a Dynamic Cognitive Mixture-of-Experts router for Claude Code. 9 expert lenses, 10 routing lanes, an R/s+ divergence gauge -- specified in 1770 machine-checked Lean 4 theorems across 99 modules, with 797 mutants applied and 797 killed, and 84 checkers behind 83 release gates.

  • Updated Aug 30, 2026
  • Shell

Created by Leonardo de Moura

Released 2013

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Repository
leanprover/lean
Website
github.com/topics/lean
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