AnalysisAI ModelsJuly 20, 2026
Claude Fable 5 produces counterexample to 87-year-old Jacobian conjecture
The model produced a hand-checkable counterexample to the Jacobian conjecture (1939), an open problem on Smale's list of 18 mathematical problems for the 21st century. Terrence Tao discussed the result in a ChatGPT conversation.
Featured · Terrence Tao
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