11-square packing problem formalized in 400k lines of Lean
ctjlewis · x · 2026-10-07
The optimality proof for packing 11 squares — one of math's favorite problems — has been formalized in roughly 400,000 lines of Lean, with AI tools like Claude and Astra assisting the community-led effort.
Related event: Optimal 11-Square Packing Proven and Formalized in Lean with AI Assistance(17 posts)→
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