AI formalizes 100-page Hopf problem proof into 250k lines of Lean
Levent Alpöge's claimed 100-page proof of the 78-year-old Hopf problem, written with Claude, was formalized into 250,000 lines of Lean code by Boris Alexeev using Codex in days. The formalization appears to check out.
Featured · Levent Alpöge, Boris Alexeev
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