Mathematics – Operator Algebras
Scientific paper
2009-02-17
Mathematics
Operator Algebras
10 pages, 0 figures. Minor corrections made and typos corrected. To appear in Rocky Mountain Journal of Mathematics
Scientific paper
Let $A$ be a stably finite simple unital $C^*$-algebra and suppose $\alpha $ is an action of a finite group $G$ with the tracial Rokhlin property. Suppose further $A$ has real rank zero and the order on projections over $A$ is determined by traces. Then the crossed product $C^*$-algebra $C^*(G,A, \alpha)$ also has real rank zero and order on projections over $A$ is determined by traces. Moreover, if $A$ also has stable rank one, then $C^*(G,A, \alpha)$ also has stable rank one.
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