Lean 4

MathCode is a terminal AI coding agent for mathematical formalization: it turns plain-language math problems into Lean 4 theorems and attempts formal proofs, with a persistent Lean REPL and supporting theorem/axiom libraries.

A benchmark for coding agents that tests whether they can formally verify properties of real-world Rust web apps in Lean 4. It includes upstream code, i5h ports, extracted Lean models, proof attempts, and task-by-task results.

A Lean 4 relational knowledge language for project relationships, rules, and queries, with a Clojure runtime/toolchain and examples inspired by Zanzibar.

A Lean 4 project for formally verified 3D mesh intersection and constructive solid geometry, with a browser demo for intersecting example meshes or STL imports.

An autonomous neuro-symbolic formal verification engine for Lean 4. The repository describes a proof workflow that generates tactics and then checks them deterministically in Lean, with example proofs, verification steps, and telemetry outputs.

A Lean 4 repository containing a machine-checked proof of Fermat’s Last Theorem, with build verification details and browsable HTML documentation for the proof structure.