Mathematics Department Colloquium
Spring 2005

Date: Thursday, March 3
Time: 4:00 p.m.
Location: 215 Thomas Building
Name: Yongbin Ruan
Affiliation: University of Wisconsin
Title: Topology of orbifolds

Abstract: There is an increasing interest on studying topology and geometry of singular spaces. Orbifolds are simplest examples. Comparing to the classical theory, new development emphasis on the "stringy" aspect or the contribution of singularities in an essential way. In the talk, we will first describe a "stringy" orbifold cohomology and its application. Then, we will switch to K-theoretic aspect. We will end the talk on an outlook on quantum cohomology of orbifold.