| 1992--Present |
Professor |
Department of Mathematics, University of California, San
Diego |
| 1988--1992 |
Associate Professor |
Department of Mathematics, University of California, San
Diego |
| 1987--1988 |
Assistant Professor |
Department of Mathematics, University of California, San
Diego |
| 1987 |
Visiting Assistant Professor |
Department of Mathematics, University of California, San
Diego |
| 1986 |
Visiting Scholar |
Department of Mathematics, Cornell University |
| 1983--1986 |
Assistant Professor |
Department of Mathematical Sciences, University of Akron |
| 1982--1983 |
Assistant Professor |
Department of Mathematics, State University of New York,
Plattsburgh |
| 1981--1982 |
Instructor |
Department of Mathematics and Statistics, Case Western Reserve
University |