Semigroup C*-algebras and toric varieties

Abstract

Let S be a finitely generated subsemigroup of Z^2. We derive a general formula for the K-theory of the left regular C*-algebra for S.

To be published as a chapter in a book on 'K-Theory for Group C*-Algebras and Semigroup C*-Algebras' jointly authored with Siegfried Echterhoff, Xin Li and Guoliang Yu