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Coxeter complexes and graph-associahedra

机译:Coxeter复合体和图关联

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摘要

Given a graph Γ, we construct a simple, convex polytope, dubbed graph-associahedra, whose face poset is based on the connected subgraphs of Γ. This provides a natural generalization of the Stasheff associahedron and the Bott-Taubes cyclohedron. Moreover, we show that for any simplicial Coxeter system, the minimal blow-ups of its associated Coxeter complex has a tiling by graph-associahedra. The geometric and combinatorial properties of the complex as well as of the polyhedra are given. These spaces are natural generalizations of the Deligne-Knudsen-Mumford compactification of the real moduli space of curves.
机译:给定图Γ,我们构造了一个简单的凸多面体,称为图关联,其面姿态基于Γ的相连子图。这提供了Stasheff关联面体和Bott-Taubes旋面体的自然概括。此外,我们表明,对于任何简单的Coxeter系统,其关联的Coxeter复合体的最小爆炸都有图相关联的平铺。给出了配合物以及多面体的几何和组合性质。这些空间是曲线实模空间的Deligne-Knudsen-Mumford压缩的自然概括。

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