Misc,

Tropical hyperplane arrangements and oriented matroids

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(2007)cite arxiv:0706.2920 Comment: 20 pages, 7 figures, best viewed in color.

Abstract

We study the combinatorial properties of a tropical hyperplane arrangement. We define tropical oriented matroids, and prove that they share many of the properties of ordinary oriented matroids. We show that a tropical oriented matroid determines a subdivision of a product of two simplices, and conjecture that this correspondence is a bijection.

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