K-Theory for Group C*-Algebras and Semigroup C*-Algebras

This book introduces the reader to the necessary technical background to study C*-algebras arising from actions of groups or semigroups
The text focuses on recent examples and techniques developed in K-Theory It contains an introduction to Baum-Connes methods as well as a concise description of the Mackey-Rieffel-Green machine for crossed products

Much of the material is available here for the first time in book form