Ronald Graham

American mathematician (1935-2020)
Ronald graham writing.jpg

Ronald Lewis Graham (October 31, 1935 – July 6, 2020) was an American mathematician. He was born in Taft, California.[1] He was known for his important work in scheduling theory, computational geometry, Ramsey theory, and quasi-randomness.[2] He discovered Graham's number.

He was the Chief Scientist at the California Institute for Telecommunications and Information Technology and the Irwin and Joan Jacobs Professor in Computer Science and Engineering at the University of California, San Diego (UCSD).

Graham died on July 6, 2020 in La Jolla, California from a rare form of a chronic pulmonary disease at the age of 84.[3][4]


  1. "2003 Steele Prizes" (PDF). Notices of the AMS. Vol. 50, no. 4. American Mathematical Society. April 2003. pp. 462–467. Archived from the original (PDF) on 26 December 2010. Retrieved 2 July 2014.
  2. Horgan, J. (1997). "Profile: Ronald L. Graham – Juggling Act". Scientific American. Nature Publishing Group. 276 (3): 28–30. doi:10.1038/scientificamerican0397-28.
  3. "The Latest: Ronald Graham, 1935–2020". American Mathematical Society. July 7, 2020. Retrieved July 7, 2020.
  4. "Ronald Lewis Graham, 2003-2004 MAA President". Mathematical Association of America. July 7, 2020. Retrieved July 7, 2020.