arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2001.08493math.GTmath.GR
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CAT(0)立方复形接触图的自同构

Automorphisms of contact graphs of ${\rm CAT(0)}$ cube complexes

Max Planck Institute for Mathematics(马克斯·普朗克数学研究所)

Elia Fioravanti

AI总结:

研究CAT(0)立方复形的自同构群与Hagen接触图的自同构群的等价性,揭示接触图与Kim-Koberda扩展图的差异。

摘要:

我们证明,在弱假设下,CAT(0)立方复形X的自同构群与Hagen的接触图C(X)的自同构群一致。特别地,对于Salvetti复形的 universal cover,这一结果提供了非 sporadic 表面曲线图的Ivanov定理的类比。这突显了接触图与Kim-Koberda扩展图之间的对比,后者具有更大的自同构群。我们还研究了Davis复形与右角Coxeter群相关的接触图。我们证明这些接触图行为较差,并描述了它们何时具有比Davis复形 universal cover 更多的自同构。

英文摘要:

We show that, under weak assumptions, the automorphism group of a ${\rm CAT(0)}$ cube complex $X$ coincides with the automorphism group of Hagen's contact graph $\mathcal{C}(X)$. The result holds, in particular, for universal covers of Salvetti complexes, where it provides an analogue of Ivanov's theorem on curve graphs of non-sporadic surfaces. This highlights a contrast between contact graphs and Kim-Koberda extension graphs, which have much larger automorphism group. We also study contact graphs associated to Davis complexes of right-angled Coxeter groups. We show that these contact graphs are less well-behaved and describe exactly when they have more automorphisms than the universal cover of the Davis complex.

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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