EventScienceJuly 23, 2026
Claude Fable 5 disproves 87-year-old Jacobian Conjecture
Anthropic's Claude Fable 5 produced a hand-checkable counterexample to the Jacobian Conjecture, an open problem since 1939. Anthropic researcher Levent Alpöge announced the result on X, sparking widespread discussion among mathematicians including Terrence Tao.
Featured · Levent Alpöge
6 sources
LLMs break down in funny ways when told the Jacobian Conjecture counterargumentminimaxir.com
Claude Fable 5 has produced a hand-checkable counterexample to the Jacobian conjecture, an open...x.com
Human mathematicians are being outcounterexampledxenaproject.wordpress.com
Terrence Tao's ChatGPT Conversation about the Jacobian Conjecture Counterexamplechatgpt.com
Mathematicians grapple with a ‘very rapid and very unsettling change’ as AI cracks yet another century-old problemfortune.com
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