Combinatorial aspects of K-theory of projective toric schemes

**Speaker**: Thomas Hüttemann (Queen's University Belfast)

**Time**: 3:00PM**Date**: Wed 2nd March 2011

**Location**: Mathematical Sciences Seminar Room

**Abstract**

A projective toric scheme X is completely specified by a (commutative) ring R, and a polytope P with integral vertex

coordinates. I will explain how to give a rather combinatorial description of "bundles of modules over X" (that is, I will demonstrate how to describe the category of quasi-coherent sheaves as a kind of diagram category), and then use this approach to prove a splitting result in K-theory. I will treat the rather involved K-theory machinery as a black box, discussing instead how the combinatorial setup allows to use descent to cover the cases of a ring R that is non-commutative but noetherian, or else commutative.

(This talk is part of the K-Theory, Quadratic Forms and Number Theory series.)

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