Non-Hausdorff groupoids, proper actions and -theory.
Nonstable K-Theory Results for Some AH-Algebras.
Notes on a class of simple C*-algebras with real rank zero.
A construction method is presented for a class of simple C*-algebras whose basic properties -including their real ranks- can be computed relatively easily, using linear algebra. A numerival invariant attached to the construction determines wether a given algebra has real rank 0 or 1. Moreover, these algebras all have stable rank 1, and each nonzero hereditary sub-C*-algebra contains a nonzero projection, yet there are examples in which the linear span of the projections is not dense. (This phenomenon...