An AI called Claude Fable 5 has produced a counterexample that appears to disprove the Jacobian conjecture, open since 1939. The maths is short enough to check by hand. The story of how it was found is not.

Mathematicians have been trying to prove the Jacobian conjecture for nearly a century, but now the Claude Fable 5 AI has apparently found a counterexample that disproves it

The Jacobian conjecture has bedeviled math experts for nearly 90 years.

An 87-year-old mathematical puzzle was solved using AI, surprising experts and marking the most complex problem yet tackled by artificial intelligence.

An AI called Claude Fable 5 has produced a counterexample that appears to disprove the Jacobian conjecture, open since 1939. The maths is short enough to check by hand. The story…

Anthropic’s Fable 5 found a 216-character counterexample to the Jacobian conjecture, an 87-year-old maths problem. Experts are split on what it means.

Anthropic's Levant Alpöge, a former Harvard valedictorian, used Claude's Fable 5 to find something that mathematicians have failed to since 1939.

Claude Fabel 5 disproved the Jacobian conjecture over the weekend, landing days after the capabilities of China's Kimi AI became the biggest force moving bitcoin markets.