B.A. Harvard 1973 (Mathematics)
Ph.D. Stanford 1976 (Mathematics) 
Employment
University of Chicago (Instructor)
University of California, San Diego (Professor)
Princeton University (Professor)
Stanford University (Professor)

Invited Address International Congress of Mathematicians, Berkeley, 1986
Sloan Foundation Research Fellow
Rademacher Lecture Series (U. Penn.)
Pitcher Lecture Series (Lehigh)
Wing Lecture Series (U. of Rochester)

P.I. on DARPA effort on topological data analysis, 2005-2010.  

I have been working on topological methods for analyzing and searching large and complex data sets over the last 15 years.