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arXiv 0908.2537math.COmath.MG
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关于次多面体的刻面

On the Facets of the Secondary Polytope

Sven Herrmann

摘要:

点构型A的次多面体是其面偏序集同构于A的所有正则剖分的偏序集的多面体。虽然次级多面体的顶点-对应于A的三角剖分-已经得到了很好的研究,但是关于次级多面体的小平面还没有太多的了解。一个多面体的分裂,正好有两个最大面的细分,是这种刻面的最简单的例子,也是第一个被系统研究的例子。本文可以看作是这些研究的继续,并作为一个起点,检查的细分相对应的方面的二级多面体一般。作为一个特殊的情况下,k-分裂的概念被引入作为一种可能性来分类多面体根据其次级多面体的方面的复杂性。应用于拟阵细分的超单形和热带几何。

英文摘要:

The secondary polytope of a point configuration A is a polytope whose face poset is isomorphic to the poset of all regular subdivisions of A. While the vertices of the secondary polytope - corresponding to the triangulations of A - are very well studied, there is not much known about the facets of the secondary polytope. The splits of a polytope, subdivisions with exactly two maximal faces, are the simplest examples of such facets and the first that were systematically investigated. The present paper can be seen as a continuation of these studies and as a starting point of an examination of the subdivisions corresponding to the facets of the secondary polytope in general. As a special case, the notion of k-split is introduced as a possibility to classify polytopes in accordance to the complexity of the facets of their secondary polytopes. An application to matroid subdivisions of hypersimplices and tropical geometry is given.

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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