SITUATION EXPLAINED: An 87-year-old math conjecture was just disproven, using Claude Fable. • The Jacobian Conjecture, proposed in 1939, claims any polynomial function with a constant, non-zero Jacobian determinant must have a polynomial inverse • Anthropic mathematician Levent Alpöge posted a concrete 3D counterexample on July 19, crediting Claude Fable with finding it, while working on the problem during the World Cup final • How it breaks the conjecture: the counterexample's Jacobian…