Kevin Buzzard
Professor of pure mathematics, Imperial College London · as of 2026-10-04 · source
Leads the Lean formalisation of Fermat's Last Theorem, which Claude completed in 11 days in September 2026.
News mentioning Kevin Buzzard (4)
- Claude produces the first complete machine-checked proof of Fermat's Last Theorem in Lean, in 11 days ★★★★★
Anthropic reported that a Claude model (roughly comparable to Claude Fable 5.1), running for 11 days (7–18 Aug 2026) using the Prove2Me multi-agent platform, produced a complete Lean formalisation of Fermat's Last Theorem using only Lean's three standard axioms: about 13 million lines and 30,300…
- AI-assisted counterexample answers Grothendieck's question on finite flat group schemes, merged into Mathlib ★★★
Akhil Mathew, using OpenAI's and Anthropic's models, found a finite locally free group scheme of order 4 over a non-reduced finite ring with 2⁹ elements that is not killed by 4 (it is killed by 8). This answers Grothendieck's question negatively. The Lean proof was merged into Mathlib on 3 Aug 2026.
- Leiden Declaration on Artificial Intelligence and Mathematics sets community norms for AI in maths (4,000+ signatories) ★★★
The Leiden Declaration on Artificial Intelligence and Mathematics, dated 2 Jun 2026 (Zenodo DOI 10.5281/zenodo.20302944), came out of a September 2025 Lorentz Center meeting in Leiden. It asks for transparent disclosure of AI use, proper attribution, peer-review standards, author rights over…
- OpenAI model disproves Erdős's 80-year-old unit distance conjecture ★★★★★
On 2026-05-20 OpenAI announced that an internal model found a counterexample to Erdős's 1946 unit-distance conjecture using algebraic number theory — widely described as the first historically significant proof produced by an AI; Timothy Gowers said he would recommend it to the Annals of…
Posts (3)
- Anthropic: Claude completes first formalized proof of Fermat's Last Theorem original ↗ Anthropic @AnthropicAI · x · 2026-09-04
Announces a 13-million-line Lean 4 formalization of FLT done in 11 days, which experts had expected to take years. - FLT: Anthropic has beaten me to it original ↗ Kevin Buzzard @XenaProject · blog · 2026-09-04
The leader of the human Lean FLT project confirms Anthropic's 11-day AI formalisation of Fermat's Last Theorem is real, and says it tells us 'essentially nothing' mathematically. - A digestion of the Jacobian conjecture counterexample original ↗ Terence Tao · blog · 2026-07-21
Tao's expert explanation of the 3D Jacobian conjecture counterexample found with Claude Fable 5, the most-cited human 'digestion' of an AI-found disproof.
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