. "1927-02-17Z"^^ . "2010Z"^^ . . "John Selfridge"@en . "2010-10-31Z"^^ . "Selfridge, John"@en . "American mathematician" . "1927Z"^^ . . . . "John Lewis Selfridge (February 17, 1927 in Ketchikan, Alaska \u2013 October 31, 2010 in DeKalb, Illinois), was an American mathematician who contributed to the fields of analytic number theory, computational number theory, and combinatorics. He co-authored 14 papers with Paul Erd\u0151s (giving him an Erd\u0151s number of 1).Selfridge received his Ph.D."@en . .