Academic Positions:
University of Wisconsin-Madison, Professor Emeritus 2003-present
University of Wisconsin-Madison, John Bascom Professor of Mathematics 1995-2003
University of Wisconsin-Madison, Gabor Szegö Professor of Mathematics, 1986-1995
University of Wisconsin-Madison, Professor of Mathematics, 1968-1986
University of Wisconsin-Madison, Associate Professor of Mathematics, 1965-1968
University of Wisconsin-Madison, Assistant Professor of Mathematics, 1963-1965
University of Chicago, Instructor, 1961-1963
Washington University, Instructor, 1958-1961

Visiting Positions:
University of Paris VII, Physics Department, June 1993
University of Minnesota, March, 1988
University of Strasbourg, June, 1979
Mathematical Institute, Budapest, June 1973
Mathematical Center, Amsterdam, 1969-1970HONORS, AWARDS:

Guggenheim Fellow, 1969-1970
Honorary Fellow of Indian Academy of Sciences, Bangalore
Fellow of American Academy of Arts and Sciences