1. Visiting Research Professor, Univ. of Sussex, (Sponsored by Univ. of Sussex and LMS) and London Mathematical Society Lecturer (Summer 1994).
   
   
2. SERC fellow, Univ. of Sussex, Fall 1993.
   
   
3. SERC fellow, Univ. of Wales, Cardiff, Spring-Summer 1987.
   
   
4. Professor of Mathematics, 1983-present, Univ. of Alabama at Birmingham.
   
   
5. Mathematics Graduate Program Director, UAB, 1984-1991.
   
   
6. Professor of Mathematics, 1976-83, Western Washington University, Bellingham, WA.
   
   
7. Visiting Professor of Mathematics, 1978-9, Univ. of Tennessee, Knoxville.
   
   
8. Associate Professor of Mathematics, 1972-6, Western Washington University.
   
   
9. Assistant Professor of Mathematics, Western Washington University, 1967-72.

1. LMS Durham Symposium in Spectral Theory and Differential Operators, Durham, UK, June 25-July 4, 1996.
   
   
2. AMS special session in nonlinear partial differential equations, Baton Rouge, La, April 1996.
   
   
3. International Conference on Evolution Equations, Univ. of Strathclyde, July 1994. (This was one of my LMS lectures; the other two were at Sussex and Cardiff.)
   
   
4. Special Session in PDE, American Mathematical Society, Memphis (Mar. 1997).
   
   
   

I am interested in spectral geometry and also its relationships with such areas as number theory. My particular interest is generalized eigenfunction expansions. I am working with one PhD student, Mayumi Sakata, in this area; she was also my number theory student as a fast-track undergraduate. I am teaching number theory and also differential geometry this year and am giving a faculty-student seminar in relations between differential geometry and classical mechanics. I gave directed reading in geometric measure theory to MS students Sabine Franz and Zonya Leonard all year last year, and gave directed reading in operator theory and operator algebras to EPSCOR scholar Milton Nash three years ago all year. He went on to do graduate work at Princeton.