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arXiv 0906.4087math.ATmath.CT
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等谱图的同伦等价

Homotopy equivalence of isospectral graphs

Terrence Bisson, Aristide Tsemo

摘要:

本文研究了由Bisson和Tsemo在有向图Gph范畴中定义的Quillen模型结构。特别是,我们给出了一个精确的描述与此模型结构的同伦类图。我们赋予N-集和Z-集范畴相关的模型结构,并证明它们的同伦范畴与同伦范畴Ho(Gph)是Quillen等价的.这使我们能够证明Ho(Gph)等价于周期Z-集的范畴cZSet,并证明两个有限有向图几乎等谱当且仅当它们在我们的意义下同伦等价。

英文摘要:

In this paper, we investigate the Quillen model structure defined by Bisson and Tsemo in the category of directed graphs Gph. In particular, we give a precise description of the homotopy category of graphs associated to this model structure. We endow the categories of N-sets and Z-sets with related model structures, and show that their homotopy categories are Quillen equivalent to the homotopy category Ho(Gph). This enables us to show that Ho(Gph) is equivalent to the category cZSet of periodic Z-sets, and to show that two finite directed graphs are almost-isospectral if and only if they are homotopy-equivalent in our sense.

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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