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arXiv 2006.13441math.OA
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保持Morita等价的$k$ -图的移动

Moves on $k$-graphs preserving Morita equivalence

Caleb Eckhardt, Kit Fieldhouse, Daniel Gent, Elizabeth Gillaspy, Ian Gonzales, David Pask

摘要:

我们启动了将有向图$C^*$ -代数的几何分类扩展到更高秩图($k$ -图)的程序,如Eilers,Restorff,Ruiz和Sorensen的2016年论文[ERRS 16]所述。为了更准确地说,我们确定了四个“移动”,或修改,一个可以执行的$k$ -图$Λ$,这使得不变的森田等价类的$C^*$ -代数$C^*(Λ)$。这些移动--分裂、延迟、汇删除和减少--受到Sorensen [S \o 13]和Bates-Pask [BP 04]描述的有向图移动的启发。正因为如此,我们对$k$ -图的观点集中在底层的有向图上。因此,我们包括两个新的结果,定理2.3和引理2.9,$k$ -图和它的基础有向图之间的关系。

英文摘要:

We initiate the program of extending to higher-rank graphs ($k$-graphs) the geometric classification of directed graph $C^*$-algebras, as completed in the 2016 paper of Eilers, Restorff, Ruiz, and Sorensen [ERRS16]. To be precise, we identify four "moves," or modifications, one can perform on a $k$-graph $Λ$, which leave invariant the Morita equivalence class of its $C^*$-algebra $C^*(Λ)$. These moves -- insplitting, delay, sink deletion, and reduction -- are inspired by the moves for directed graphs described by Sorensen [S\o13] and Bates-Pask [BP04]. Because of this, our perspective on $k$-graphs focuses on the underlying directed graph. We consequently include two new results, Theorem 2.3 and Lemma 2.9, about the relationship between a $k$-graph and its underlying directed graph.

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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