Paul Halmos, Hungarian-American mathematician (born 1916)

Paul Richard Halmos was a Hungarian-born American mathematician and probabilist who made fundamental advances in the areas of mathematical logic, probability theory, operator theory, ergodic theory, and functional analysis. He was also recognized as a great mathematical expositor. He has been described as one of The Martians.

October 2 is the 275th day of the year in the Gregorian calendar; 90 days remain until the end of the year.