University of Toronto professor Jacob Tsimerman has been awarded the Fields Medal, becoming the first scholar based at a Canadian institution to receive the prestigious honor.
The announcement was made on July 23, 2026, at the International Congress of Mathematicians in Philadelphia.
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Often referred to as the Nobel Prize of mathematics, the Fields Medal is awarded every four years to mathematicians under the age of 40.
Tsimerman shares the 2026 prize with Yu Deng, John Pardon, and Hong Wang. Each recipient receives a $15,000 award.
A Breakthrough Proof of the André-Oort Conjecture
The 38-year-old mathematician was recognized primarily for his groundbreaking proof of the André-Oort conjecture, a complex arithmetic geometry problem that had remained unsolved for nearly four decades.
His recent research has also resolved the Griffiths conjecture and expanded functional transcendence theory.
Reflecting on his achievement, Tsimerman emphasized the collaborative nature of mathematical discoveries.
“It’s an incredible honour to win this award – not just for me, but for all my collaborators without whom this truly would not be possible,” said Tsimerman, a U of T alumnus.
“Math is such a team sport that it becomes impossible to disentangle who contributed what on projects.
I'm lucky to have many of my collaborators as close friends, which helps work feel fun and playful.”
Early Passion for Puzzles
Tsimerman’s fascination with mathematical puzzles began in early childhood.
He went on to win two gold medals at the International Mathematical Olympiad, including a perfect score in 2004.
