Programming Language Theory λΠ

A modern proof language

Building a modern functional compiler from first principles. (http://dev.stephendiehl.com/fun/)

Agda is a dependently typed programming language / interactive theorem prover.

Lean Theorem Prover

A Coq library for Homotopy Type Theory

A friendly little systems language with first-class types. Very WIP! 🚧 🚧 🚧

Experimental implementation of Cubical Type Theory

Playing Sudoku in TypeScript while the type checker highlights mistakes.

Research on integrating datalog & lambda calculus via monotonicity types

A menagerie of cute implementations of modern typechecking algorithms

A fast functional language based on two level type theory

Programming language agnostic type construction language based on polynomials.

A garden of small programming language implementations 🪴

My personal repository of formally verified mathematics.

Logical manifestations of topological concepts, and other things, via the univalent point of view.

Research on theory of programming languages λ, compilers, interpreters, functional programming, formal methods, logic etc.

😎TT

Lecture notes on univalent foundations of mathematics with Agda

The People's Refinement Logic

"Between the darkness and the dawn, a red cube rises!": a proof assistant for cartesian cubical type theory

Exercises from Benjamin Pierce's "Types and Programming Languages" textbook + extras!

Variant types in TypeScript

A research project in path semantics, a re-interpretation of functions for expressing mathematics

List of resources about foundational knowledge for programmers (supposed to last a few decades)

A Super Kawaii Dependently Typed Programming Language

A curated list of awesome Category Theory resources.

Cicada Language (solo version)

📚 A collection of resources about supercompilation

An experimental language exploring computation and meaning through term unification, with logic-agnostic types.