Exceptions to the ABC conjecture in Lean

The (currently unofficial) sublibrary of Mathlib dedicated to additive combinatorics

The proof that the adele ring of a number field is locally compact, formalised in Lean 4.

Verify Cairo contracts in Lean 4

Disproof of the Aharoni–Korman conjecture

Algorithms and Complexity Library using the lightweight query combinator framework called "Prog"

Verified efficient algorithms in Lean4.

Lean formalization of aperiodic monotiles papers (staging repository for material not yet in mathlib)

A Lean companion to Analysis I

tool for turning Lean proofs into Blender animations

Formalisation of the Kelley-Meka bound on Roth numbers

Formal verification of apportionment theory.

Don't disturb my circle!

Formalization of Arithmetization of Mathematics/Metamathematics

Formally Verified Arguments of Knowledge in Lean

Verified algorithms in Lean, implemented and proved by AIs

A formalized proof of Artin-Wedderburn theorem in Lean4

Automata theory in Lean