Hal Schenck : On equivariant Chow cohomology of nonsimplicial toric varieties

Posted by , part of the Algebraic Geometry Seminar.

At

Oct. 29, 2009, 4 p.m.

In

SEO 636

Abstract

For a toric variety X determined by a polyhedral fan P in a lattice N, the (rational) equivariant Chow cohomology is a graded Sym(N) module. We study the Chern classes of the associated reflexive sheaf on Proj(N). The first two Chern classes depend only on the combinatorics of P, but c_3 depends on the geometry of codimension two intersections of facets of P.