Bachelor, Rice University, 1963. Doctor of Philosophy, Rice University, 1968.
Research mathematician, Esso Production Research, Houston, 1968; instructor, University of Chicago, 1968-1969; assistant professor, University of Chicago, 1969-1972; associate professor, University of Chicago, 1972-1975; professor mathematics, University of Chicago, since 1975; professor computer science, University of Chicago, since 1985; chairman computer science, University of Chicago, 1994-1997. Principal, officer, past board directors DREM (formerly Dupont-Rachford Engineering Mathematics Company), Houston, 1969-1992. Principal technical advisory Stoner Associations, Inc., since 1992.
Fellow American Association for the Advancement of Science. Member American Mathematics Society, Society Industrial and Applied Mathematics, Association Computing Machinery.
Married Judy Smith, August 20, 1964. Children: Michelle, Todd K.