Viral claim: Claude Fable 5 may have cracked the Jacobian conjecture
kimmonismus · x · 2026-07-20
A viral thread claims **Claude Fable 5** produced a *hand-checkable counterexample* to the long-open **Jacobian conjecture**. - The conjecture, open since **1939**, says that a polynomial map with a constant non-zero Jacobian determinant must have a polynomial inverse. - The post frames this as an almost absurdly large breakthrough: an 87-year-old problem allegedly solved by a model on a Sunday evening. - The attached image shows multiple researchers reacting with disbelief and excitement, underscoring how shocking the claim is to the math/AI crowd. The key point is not a verified proof, but the reaction: if true, it would be one of the most extraordinary AI-math moments yet.
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