A minimal development of SSA theory

A verifier for automated and interactive proofs about transition systems.

Rewriting Principia Mathematica in Lean

Loom is a framework for automated generation of foundational multi-modal verifiers. This repository is a mirror with stable snapshots. Submit issues and PRs here.

Canonical is a performant sound and complete type inhabitation solver for dependent type theory.

A prototype for a monadic program logic in Lean that has since been upstreamed into the Lean 4 repo

Effect monads with specifications (DIjkstra Monads) in Lean 4