OpenAI says an AI swarm solved the 90-year-old Navier-Stokes puzzle, but NYU mathematician Tristan Buckmaster says he and a collaborator reached a related result first.

Mathematicians at OpenAI showed that the Navier-Stokes equations, which describe how fluids flow, can sometimes “blow up.” But the massive result is not without controversy.

A mathematician compared the feat to the history-making chess competition in which IBM’s Deep Blue computer beat Garry Kasparov in 1997