Classification of simple C*-algebras and higher dimensional noncommutative tori

Abstract

We show that unital simple C*-algebras with tracial topological rank zero which are locally approximated by subhomogeneous C^-algebras can be classified by their ordered $K$-theory. We apply this classification result to show that certain simple crossed products are isomorphic if they have the same ordered $K$-theory. In particular, irrational higher dimensional non-commutative tori of the form $C({\mathbb{T}}^k){\times }_{\theta }\mathbb{Z}$ are in fact inductive limits of circle algebras.

24 pages published version