Born September 6, 1940, in Dover, Ohio. B.S. and M.S. (electrical engineering), Massachusetts Institute of Technology, 1962; Ph.D. 1964. Assistant Professor of Electrical Engineering, University of California, Berkeley, 1964-66. Visiting Assistant Professor of Statistics, University of North Carolina, 1966. Member of the Technical Staff, Bell Telephone Laboratories Mathematics Research Center 1966-71. Adjunct Assistant Professor of Electrical Engineering, Princeton University, 1969; Visiting Lecturer, Westfield College, University of London, 1970; Professor of Mathematics and of Electrical Engineering and Computer Science (EECS), University of California, Berkeley, 1971-1983; ; Associate Chairman of EECS for Computer Science, 1975-77. Founder and President, Cyclotomics, Inc. (became Kodak Berkeley Research), 1983-89. President, Axcom Trading Advisors (manager of "Medallion Fund", now Renaissance Technology), 1989-91; Visiting Professor of Mathematics and EECS, Massachusetts Institute of Technology, 1991-93; Chairman of the Board, Mathematical Sciences Research Institute, 1994-98; Chairman of the Board, International Computer Science Institute, 2000-2003. Professor of Mathematics, half-time, University of California, Berkeley, 1983-2002, Professor in the Graduate School, 2002-2006; PROFESSOR OF MATHEMATICS EMERITUS, UNIVERSITY OF CALIFORNIA, BERKELEY, 2006-PRESENT.