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arXiv 0901.0032math.OA
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$C^*$ -对应图与Fell丛

Graphs of $C^*$-correspondences and Fell bundles

Valentin Deaconu, Alex Kumjian, David Pask, Aidan Sims

摘要:

我们定义了一个$Λ$ -系统的$C^*$ -对应关系相关联的高秩图$Λ$的概念。粗略地说,这样一个系统分配给$Λ$的每个顶点一个$C^*$ -代数,并分配给$Λ$中的每条路径一个$C^*$ -对应,其方式是将路径的合成携带到$C^*$ -对应的平衡张量积。在某些简化的假设下,我们利用Fowler的Cuntz-Pimsner代数技术,将$C^*$ -对应的乘积系统与一个$C^*$ -代数关联到每个$Λ$ -系统上.然后,我们在路群胚$\Gg_Λ$上构造了一个Fell丛,并证明了$Λ$ -系统的$C^*$ -代数与Fell丛的约化截面代数一致.最后,我们讨论了我们的建设在文献中出现的几个例子。

英文摘要:

We define the notion of a $Λ$-system of $C^*$-correspondences associated to a higher-rank graph $Λ$. Roughly speaking, such a system assigns to each vertex of $Λ$ a $C^*$-algebra, and to each path in $Λ$ a $C^*$-correspondence in a way which carries compositions of paths to balanced tensor products of $C^*$-correspondences. Under some simplifying assumptions, we use Fowler's technology of Cuntz-Pimsner algebras for product systems of $C^*$-correspondences to associate a $C^*$-algebra to each $Λ$-system. We then construct a Fell bundle over the path groupoid $\Gg_Λ$ and show that the $C^*$-algebra of the $Λ$-system coincides with the reduced cross-sectional algebra of the Fell bundle. We conclude by discussing several examples of our construction arising in the literature.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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