Ronald Graham

Ronald Lewis Graham was an American mathematician, born on 31 October 1935 and died on 6 July 2020, whom the American Mathematical Society credited as one of the principal architects of the rapid development of discrete mathematics worldwide. He was president of both the American Mathematical Society and the Mathematical Association of America, and his honors included the Leroy P. Steele Prize for lifetime achievement and election to the National Academy of Sciences. He worked at Bell Labs for many years and later at the University of California, San Diego, and he published the original Graham scan algorithm in 1972.