Classification of the crossed product $C(M)\times_θ\Z_p$ for certain pairs $(M,θ)$

Details Classification of the crossed product $C(M)\times_θ\Z_p$ for certain pairs $(M,θ)$ Classification of the crossed product $C(M)\times_θ\Z_p$ for certain pairs $(M,θ)$

2010-02-21

arxiv.org/abs/1002.3959v1

Mathematics

Operator Algebras

11 pages. Filomat 2010 (to appear)

Scientific paper

Let $M$ be a separable compact Hausdorff space with $\dim M\le 2$ and $\theta\colon M\to M$ be a homeomorphism with prime period $p$ ($p\ge 2$). Set $M_\theta=\{x\in M| \theta(x)=x\}\not=\varnothing$ and $M_0=M\backslash M_\theta$. Suppose that $M_0$ is dense in $M$ and $\mathrm H^2(M_0/\theta,\Z)\cong 0$, $\mathrm H^2(\chi(M_0/\theta),\Z)\cong 0$. Let $M'$ be another separable compact Hausdorff space with $\dim M'\le 2$ and $\theta'$ be the self--homeomorphism of $M'$ with prime period $p$. Suppose that $M_0'=M'\backslash M_{\theta'}'$ is dense in $M'$. Then $C(M)\times_\theta\Z_p\cong C(M')\times_{\theta'}\Z_p$ iff there is a homeomorphism $F$ from $M/\theta$ onto $M'/\theta'$ such that $F(M_\theta)=M'_{\theta'}$. Thus, if $(M,\theta)$ and $(M',\theta')$ are orbit equivalent, then $C(M)\times_\theta\Z_p\cong C(M')\times_{\theta'}\Z_p$.

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