# Parabolic Chern Character of the de Rham Bundles

 COMPLEX ALGEBRAIC GEOMETRY Topic: Parabolic Chern Character of the de Rham Bundles Speaker: Jaya Iyer Affiliation: Institute of Mathematical Sciences, India and Member, School of Mathematics Date: Wednesday, December 13 Time/Room: 11:00am - 12:00pm/S-101

Characteristic classes of Flat bundles on smooth algebraic varieties are defined in various cohomology theories. We consider the de Rham cohomology, the Deligne cohomology and the rational Chow groups and study the classes. We focus on the special flat bundles which arise from smooth families, namely the cohomology bundles or the de Rham bundles. We consider the parabolic canonical extensions of these bundles on a nonsingular compactification of the base and obtain a relation between the parabolic Chern character of the different weights de Rham bundles in the rational Chow groups. This is a joint work with C. Simpson.