PSU Mark
Eberly College of Science Mathematics Department

Meeting Details

For more information about this meeting, contact Aissa Wade.

Title:Motivic cohomology operation II
Seminar:Topology/Geometry Seminar
Speaker:Zhaohu Nie, Penn State University
Motivic cohomology is the analogue in algebraic geometry of singular cohomology in algebraic topology. The corresponding motivic Borel-Moore homology groups are Bloch's higher Chow groups, which have Chow groups -- algebraic cycles modulo rational equivalence -- as special cases. As such, motivic cohomology enjoys close relationship with algebraic K-theory. Pushing this analogy further, there are reduced power operations in motivic cohomology as counterparts to the topological ones. Voevodsky constructed them following the classical construction of Steenrod. After describing these background briefly, we will present another construction of these operations, following a topological construction of Karoubi. The relation of the two approches is that of a fixed point set with the associated homotopy fixed point set.

Room Reservation Information

Room Number:MB315
Date:09 / 11 / 2008
Time:02:30pm - 03:30pm