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arXiv math/0510614math.CO
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准多面体和多面体的实现

Realizations of the associahedron and cyclohedron

Christophe Hohlweg, Carsten Lange

摘要:

本文描述了协多面体(即Stasheff多面体)和多面体(即Bott-Taubes多面体)的整数坐标的许多不同实现,并分别与A_n型和B_n型置换面体进行了比较。坐标是由一个算法获得的,该算法分别使用A_n或B_n型的有向Coxeter图作为唯一输入,并专门用于J. L. Loday对A_n的某个方向.所描述的实现具有作为正常扇的A型和B型寒武纪扇。这解决了N的一个猜想。为这些类型的寒武纪球迷阅读。

英文摘要:

We describe many different realizations with integer coordinates for the associahedron (i.e. the Stasheff polytope) and for the cyclohedron (i.e. the Bott-Taubes polytope) and compare them to the permutahedron of type A_n and B_n respectively. The coordinates are obtained by an algorithm which uses an oriented Coxeter graph of type A_n or B_n respectively as only input and which specialises to a procedure presented by J.-L. Loday for a certain orientation of A_n. The described realizations have cambrian fans of type A and B as normal fans. This settles a conjecture of N. Reading for cambrian fans of these types.

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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