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

The open workbench for AI safety, made formal. Turn safety questions into machine-checked Lean proofs — a shared launchpad where researchers and AI agents build provable safety together.

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

A Lean companion to Analysis I

Formally Verified Arguments of Knowledge in Lean

A formalized proof of Artin-Wedderburn theorem in Lean4

repository for the collaborative formalization seminar in Analysis in Bonn

An Universe for Mitar —— Classical Calculus

Formalization of communication complexity in Lean

A formal consistency proof of Quine's set theory New Foundations

Formalisation of some facts about event structures and reversibility

A project to formalize Fisher-Tippett-Gnedenko theorem (default project of course MS-EV0029)

Machine-checked statistical learning theory in Lean 4: empirical-Bernstein and time-uniform PAC-Bayes, Markov risk, Rademacher/VC, and Dudley chaining.

Formalization of Mathematical Logic