Charleston Lean Proof Assistant Meetup

Lean is a functional programming language with a highly expressive type system. It can be used to produce performant programs that are guaranteed to meet their specifications, which proves that a large class of bugs cannot exist in your program. It can also be used to interactively prove theorems in mathematics. This meetup is for enthusiasts to join together to learn, code, and share their experiences with Lean.

During our December meeting we will be working together to solve some of the Advent of Code 2025 puzzles in Lean.