Projection volumes of hyperplane arrangements

Details Projection volumes of hyperplane arrangements Projection volumes of hyperplane arrangements

2010-01-28

arxiv.org/abs/1001.5095v1

Mathematics

Combinatorics

Scientific paper

We prove that for any finite real hyperplane arrangement the average projection volumes of the maximal cones is given by the coefficients of the characteristic polynomial of the arrangement. This settles the conjecture of Drton and Klivans that this held for all finite real reflection arrangements. The methods used are geometric and combinatorial. As a consequence we determine that the angle sums of a zonotope are given by the characteristic polynomial of the order dual of the intersection lattice of the arrangement.

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