Representations of Higher Rank Graph Algebras

Details Representations of Higher Rank Graph Algebras Representations of Higher Rank Graph Algebras

2008-04-23

arxiv.org/abs/0804.3802v1

Mathematics

Operator Algebras

30 pages

Scientific paper

Let $\Fth$ be a $\Bk$-graph on a single vertex. We show that every irreducible atomic $*$-representation is the minimal $*$-dilation of a group construction representation. It follows that every atomic representation decomposes as a direct sum or integral of such representations. We characterize periodicity of $\Fth$ and identify a symmetry subgroup $H_\theta$ of $\bZ^\Bk$. If this has rank $s$, then $\ca(\Fth) \cong \rC(\bT^s) \otimes \fA$ for some simple C*-algebra $\fA$.

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