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arXiv 1306.3170math.GT
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大平底鞋在裤子图

Large flats in the pants graph

José L. Estévez

摘要:

本文讨论裤子图P(S)的几何性质,P(S)是一个与有限型拓扑曲面S相关联的自然单纯图,其顶点表示裤子分解.本文的主要结果是:对于复曲线Q,其补曲面是复杂度至多为1的子曲面。我们证明了相应的子图P(Q)在P中是全测地的,以前认为这是一个度量空间,每个边的长度为1。平坦图是同构于有限秩交换无挠的群的凯莱图的图。作为主要定理的一个结果,我们明确了裤子图中存在最大尺寸的平面(大平面)。

英文摘要:

This note is about the geometry of the pants graph P(S), a natural simplicial graph associated to a finite type topological surface S where vertices represents pants decompositions. The main result in this note ascserts that for a multicurve Q whose complement is a number of subsurfaces of complexity at most 1. We prove that the corresponding subgraph P(Q) is totally geodesic in P, previously considering this as a metric space assigning length one to each edge. A flat is a graph isomorphic to the Cayley graph of an abelian torsion free group of finite rank. As a consequence of the main theorem we make explicit the existence of maximal size flats (large flats) in the pants 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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