Dartmouth Dartmouth Mathematics Colloquium MATH



Thursday, May 15, 1997

4:00-5:00 pm

102 Bradley Hall


Professor Wolfgang Ziller


University of Pennsylvania


speaks on

Manifolds with positive and nonnegative sectional curvature



Abstract. An important class of manifolds in Riemannian geometry are those with positive curvature (or more generally nonnegative curvature). In spite of much work on this subject, very few examples are known, all of which are closely related to Lie groups and Lie group actions. We will discuss known examples among homogeneous spaces, biquotients of Lie groups, and cohomogeneity one manifolds.


Tea. High tea will be served at 3:30 pm in the Bradley Lounge.
Emmy's. Certain refreshments will be available at Emmy's after the talk.
Hostess. Megan Kerr is the hostess. Anybody who is interested in having dinner with the speaker should contact Megan at 646-1614.