John Horton Conway

John Horton Conway FRS (26 December 1937 – 11 April 2020) was an English mathematician. He is known for his theory of finite groups, knot theory, number theory, combinatorial game theory and coding theory. 
He also worked in many branches of recreational mathematics, mainly for the invention of the cellular automaton called the Game of Life. 
Conway was a Professor Emeritus of Mathematics at Princeton University in New Jersey.
Conway died of COVID-19 on 11 April 2020 in New Brunswick, New Jersey at the age of 82. He was diagnosed with the infection three days before his death.