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arXiv 1306.6682math.OA
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具有图拟Rokhlin性质的自同构交叉积

Crossed Products by Automorphisms with the Tracial Quasi-Rokhlin Property

Julian Buck

摘要:

引入了非单单位C* 代数A的自同构α的迹拟Rokhlin性质.证明了在适当的假设下,相关的交叉积C* 代数-代数C*(Z,A,alpha)是简单的,C*(Z,A,alpha)$上的迹态空间与A上的alpha不变迹态空间之间存在一个双射.我们证明了,对于极小动力系统(X,h)和一个简单的、可分的、有单位元的C* 代数A,扩展h在C(X)上作用的自同构β具有迹拟Rokhlin性质,从而C*(Z,C(X,A),β)具有上述结构性质.

英文摘要:

We introduce the tracial quasi-Rokhlin property for an automorphism alpha of a unital C*-algebra A, which is not assumed to be simple. We show that under suitable hypotheses, the associated crossed product C*-algebra C*(Z,A,alpha) is simple, and there is a bijection between the space of tracial states on C*(Z,A,alpha)$ and the alpha-invariant tracial states on A. We show that, for a minimal dynamical system (X,h) and a simple, separable, unital C*-algebra A, the automorphism beta which extends the action of h on C(X) has the tracial quasi-Rokhlin property, and hence that C*(Z,C(X,A),beta) has the structural properties described above.

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