| LECTURES |
| Art & Mathematics, Venice, Italy, 2002 |
| Art & Mathematics, Cooper Union, Nyc. 2000 |
|
Mathematics and Culture, Bologna, Italy 2000 |
| Colloque Mathematiques et Arts, Maubeuge, France 2000 |
| Wenner-Gren Foundation, Stockholm, Sweden 2000 |
| University of California, Berkeley, CA 1998 |
| Southwestern College, Winfield, Kansas 1998 |
| University of the Basque Country, San Sebastian, Spain 1998 |
| Smithsonian Institution, Washington, DC 1996 |
| The Century Association, New York City, NY 1995 |
| American Ass. for the Advancement of Science, San Francisco 1994 |
| Yale University, New Haven, CT 1993 |
| Silvermine Guild, New Canaan, 1993 |
| SUNY, Albany, NY 1992 & 1993 |
| Lecture tour, (six cities) Australia, 1992 |
| Scripps College, Claremont, CA 1991 |
| Cummer Gallery of Art, Jacksonville, FL1990 |
| State University of New York, Stonybrook, NY 1989 |
| New Canaan Library, New Canaan, CT1989 |
| Rhode Island College, RI, 1988 |
| Silvermine Guild for Arts, New Canaan, 1986 |
| Katonah Gallery, Katonah, N.Y., 1985 |
| Westport Center of Arts,Westport, CT, 1985 |
| Darien Library, Darien, CT, 1984 |
| Stamford Library, Stamford, CT, 1983 |
| The New School, New York City, NY, 1982 |
| Boston Visual Artists Union, Boston, MA, 1981 |
| Columbia University, New York City, NY, 1981 |
| Hunter College, New York City, NY, 1981 |
|
Yale University, New Haven, CT (architectural jury)1981 and 1986 |