The Agda Universal Algebra Library (html docs available at the url below)

Lean project for Fall 2020

A Crèche Course in Model Theory. Lecture notes for an introductory (under)graduate couse in model theory

A Lean library for descriptive complexity: NP-completeness and the polynomial hierarchy by first-order reductions, stronger than polynomial-time (Karp) reductions. Machine-free Cook–Levin, all 21 Karp problems, on Mathlib's ModelTheory

The Agda Universal Algebra Library (html docs available at the url below)

A Maxima CAS package for finite model theory

Formalizing the clone theory in type theory and Agda

Experimental formal-methods framework for generating finite semantic path-equivalence theorem artifacts in Lean/Mathlib from Python witness records.

Lean 4 formalization of infinitary logic and model theory: Scott/Karp, Morley–Hanf, Craig interpolation, López–Escobar, etc.

Canonical-lane closure package for Schanuel's conjecture: admissible-class formulation, projection gates, local-to-global bridge, and carried remainder.

My mathematical enquires

A JavaScript library for experimenting with concepts from first order logic, description logic, model theory, type theory, set theory, RDF, OWL, SKOS, etc. Aspires to be "standard" open source javascript by using npm, jest, standardjs, EcmaScript modules accessible from both HTML and server-side nodejs.

Volume VIII of Learning Real Analysis: Model theory, type theory, lambda calculus, and foundations of computation.