Mathematics – Operator Algebras
Scientific paper
2002-11-08
Mathematics
Operator Algebras
13 pages, LaTeX
Scientific paper
For an arbitrary countable directed graph E we show that the only possible values of the stable rank of the associated Cuntz-Krieger algebra C*(E) are 1, 2 or \infty. Explicit criteria for each of these three cases are given. We characterize graph algebras of type I, and graph algebras which are inductive limits of C*-algebras of type I. We also show that a gauge-invariant ideal of a graph algebra is itself isomorphic to a graph algebra.
Deicke Klaus
Hong Jeong Hee
Szymanski Wojciech
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