Seminars & Colloquia Calendar
Lannes' T-functor and Chow rings of classifying spaces
David Hemminger (UCLA)
Location: Via zoom: https://rutgers.zoom.us/j/95075528338
Date & time: Wednesday, 18 November 2020 at 2:00PM - 3:00PM
Abstract: Equivariant Chow rings, including Chow rings of classifying spaces of algebraic groups, appear often in nature but are difficult to compute. Like singular cohomology in topology, these Chow rings modulo a prime p carry the additional structure of unstable modules over the Steenrod algebra. We utilize this extra structure to refine estimates of equivariant Chow rings mod p. As a special case, we prove an analog of Quillen's stratification theorem, generalizing and recovering prior results of Yagita and Totaro.