Boris Tsirelson

Boris Semyonovich Tsirelson (May 4, 1950 – January 21, 2020) (, ) was a Russian–Israeli mathematician. He was a Professor of Mathematics at Tel Aviv University in Israel. He was born in Leningrad. He was known for his discoveries: Tsirelson's bound, Tsirelson space, Tsirelson drift and Gaussian isoperimetric inequality.
Tsirelson, who had cancer, was euthanized on January 21, 2020 in Basel, Switzerland at the age of 69.