lean
22 stories and discussions about lean, aggregated from every source we track.
Michael Spivak's Calculus formalized in Lean 4: every theorem and every problem of all 30 chapters and 9 appendices, in both the 3rd and 4th editions - stormj-UH/spivak-lean
Rational vectors, sequence models, and verified parallelism in Lean.
Free 6-max No-Limit Hold'em poker trainer that runs entirely in your browser (Pyodide/WebAssembly) + the open, measured poker-bot research lab behind it: 272 modules and every measurement docum...
We introduce FrontierMath Erdős (FME), a benchmark of 68 Erdős problems that are open as of August 2026. To solve a task in FME, AI systems must resolve (prove or disprove) one of the 68 conjectures in the proof…
Contribute to theoriclabs/leanapi development by creating an account on GitHub.
A synchronous HTTP client for Lean 4 backed by libcurl - theoriclabs/leanhttp
You’re reading a four-part series on how AI has impacted our Lean LaunchPad class and what we did about it. Part 1: The Year AI Came For Us Part 2: AI Killed the MVP – Long Live the IUP Part …
A general geometry library in LEAN 4. Contribute to qinz1yang/differential-geometry development by creating an account on GitHub.
AI-agent pipeline producing machine-verified Lean 4 proofs — four PRs merged into Google DeepMind's formal-conjectures - Sanexxxx777/ProofForge
Lean 4 formalization of Intrinsic Uniqueness and Reconstruction Across Mathematical Presentations - mripr-institute/intrinsic-uniqueness-reconstruction
It is somewhat strange, but I haven’t really spent much time working on proof production or recording out of egraphs.
Play proof golf in Lean 4. Solve theorem-proving challenges with the shortest valid proof, then compete on classic and term leaderboards.
In A Study of Spinoza's Ethics (1984, §17), Jonathan Bennett argues that the demonstration of Proposition V of Spinoza's Ethica contains identifiable invalid moves and that, even granted those moves, "cannot yield…
Arbitrary precision, custom formats, and fast software backends with Lean proofs connecting execution to the specification.
Complete production webapp in Lean. Contribute to paulbutcher/lean-todomvc-max development by creating an account on GitHub.
Claude agents wrote a 13-million-line Lean 4 proof of Fermat's Last Theorem in 11 days. How it was checked, what it cost, and why Kevin Buzzard shrugs.