An Existential Crisis in Math

AI just solved one of the world’s hardest math problems.

Illustration by Alisa Gao / The Atlantic September 15, 2026, 2:41 PM ET Share Save In late July, one of the world’s most famous mathematicians issued a warning to his field. Math is entering a “turbulent period,” the UCLA professor Terence Tao said in front of a packed lecture hall at the International Congress of Mathematicians. AI is getting so good at math, he said, that it’s causing a “crisis in our mathematical values and practices.”

Earlier in the same week that Tao gave his talk at math’s most prestigious conference, a researcher at Anthropic had used Claude to disprove an 87-year-old math conjecture. Still, when I asked mathematicians at the conference about their experiences with AI, most hadn’t thought deeply about the topic. Many seemed a little surprised that a journalist was asking them about it at all.