My other website.

This book will be a textbook written in the univalent style, taking advantage of the presence of symmetry in the logic at an early stage.

Ground Zero: Lean 4 HoTT Library

C++ solver for Great Orb Project puzzles

Main repository of SageMath

A JavaScript framework for interactive (mathematical) content.

RS dungeoneering map viewer

A free and strong UCI chess engine

Porting random files from Lean 3 mathlib into Lean 4, just for fun.

UCI chess engine

a language for fast, portable data-parallel computation

Chess analysis GUI for UCI engines, with extra features for Leela (Lc0) in particular.

Lean 4 programming language and theorem prover

A simple visual editor for creating commutative diagrams.

Great Orb Project website and emulator and other good stuff

Tone generator Windows app.