EVENT DETAILS AND ABSTRACT

Title: Geometric cycles and manifold bundles
Speaker: Bena Tshishiku
Speaker Info: Harvard University
Brief Description:
Special Note:
Abstract:

Much recent work has gone toward computing the ring H*( BDiff(M) ) of characteristic classes of smooth fiber bundles with fiber M. For some M we have a good understanding of the cohomology in the "stable range," but very little is known beyond that. In this talk I will discuss a construction of classes outside the stable range (for some special M) that come from "geometric cycles" in the cohomology of arithmetic groups.