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arXiv 2110.04501math.OAmath.DSmath.GR
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Garside范畴的左正则表示I. C* 代数与广群

Left regular representations of Garside categories I. C*-algebras and groupoids

Xin Li

摘要:

我们开始研究C* 代数和群胚产生于左正则表示的Garside范畴,这一概念起源于研究辫群。每个高阶图都是Garside范畴。我们开发了一个一般的分类结果,我们的广群的封闭不变子空间以及标准的拓扑自由性和局部收缩性,属性是相关的结构,相应的C* 代数。我们的结果从概念上解释了高秩图C* 代数规范不变理想的已有结果。作为另一个应用,我们给出了由Artin-Tits幺半群的左正则表示生成的C* 代数的理想结构的完整分析.

英文摘要:

We initiate the study of C*-algebras and groupoids arising from left regular representations of Garside categories, a notion which originated from the study of Braid groups. Every higher rank graph is a Garside category in a natural way. We develop a general classification result for closed invariant subspaces of our groupoids as well as criteria for topological freeness and local contractiveness, properties which are relevant for the structure of the corresponding C*-algebras. Our results provide a conceptual explanation for previous results on gauge-invariant ideals of higher rank graph C*-algebras. As another application, we give a complete analysis of the ideal structures of C*-algebras generated by left regular representations of Artin-Tits monoids.

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