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Bisubmodular polyhedra, simplicial divisions, and discrete convexity

机译:双亚模多面体,简单除法和离散凸

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摘要

We consider a class of integer-valued discrete convex functions, called BS-convex functions, defined on integer lattices whose affinity domains are sets of integral points of integral bisubmodular polyhedra. We examine discrete structures of BS-convex functions and give a characterization of BS-convex functions in terms of their convex conjugate functions by means of (discordant) Freudenthal simplicial divisions of the dual space.
机译:我们考虑一类整数值离散凸函数,称为BS凸函数,定义在其亲和力域为整体双子模多面体的积分点集的整数晶格上。我们研究了BS凸函数的离散结构,并通过对偶空间的(不一致)Freudenthal单纯除法给出了BS凸函数的凸共轭函数表征。

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