Srimathy Srinivasan (University of Colorado) Good reduction of unitary groups of quaternionic skew-hermitian forms
Tue, Jan. 28 4pm (MATH 350)
Bob Gompf (University of Texas at Austin) Exotic Smooth Structures on R^4
One of the most surprising discoveries in 4-manifold topology was the existence of smooth manifolds homeomorphic, but not diffeomorphic, to Euclidean 4-space. For fundamental reasons, this phenomenon can only occur in 4 dimensions. We will survey the subject, from its origin to recent developments regarding symmetries of such manifolds. This talk should be accessible to a broad audience.