This U of T professor just won math’s highest honour

AI News July 31, 2026 05:33 PM

University of Toronto professor and Fields Medal winner Jacob Tsimerman in his campus office. Tsimerman is taking a leave from academia and heading to San Francisco where he’ll join the safety division of OpenAI, the company behind ChatGPT.

Janet Hurley is a Toronto Star journalist and senior writer covering culture, education and societal trends. She is based in Toronto. Reach her via email: jhurley@thestar.ca.

This U of T professor just won math’s highest honour

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