Massachusetts Institute of Technology | Russian Academy of Sciences | California Institute of Technology | Art Institute of Chicago | National Academy of Sciences | American Academy of Arts and Sciences | Institute for Advanced Study | American Institute of Architects | Georgia Institute of Technology | Rensselaer Polytechnic Institute | Academy of Motion Picture Arts and Sciences | Rochester Institute of Technology | Franklin Institute | Royal Institute of Technology | Pasteur Institute | Institute of Contemporary Arts | BASIC | California Institute of the Arts | Institute of Electrical and Electronics Engineers | British Film Institute | Chinese Academy of Sciences | Pratt Institute | National Cancer Institute | Virginia Military Institute | Cato Institute | Australian Institute of Sport | Illinois Institute of Technology | Curtis Institute of Music | American Institute of Aeronautics and Astronautics | Visual Basic |
During 1997-1998 he was Research Associate at the Feza Gursey Institute for Basic Sciences in Istanbul and visiting professor of Mathematics at the Boğaziçi University, Istanbul and the University of Paris, Paris, France.