The Number Of Unique-Sink Orientations of the Hypercube*

The Number Of Unique-Sink Orientations of the Hypercube*
复制标题

超立方体独特水槽方向的数量*

DOI:
10.1007/s00493-006-0007-0
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发表时间:
2006
期刊:
影响因子:
1.1
通讯作者:
J. Matoušek
J. Matoušek
中科院分区:
数学2区
文献类型:
--
作者:
J. Matoušek

文献摘要

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令Qd表示d维立方体的图。唯一汇方向(USO)是 Qd 的一种方向,使得 Qn 的每个面都恰好有一个汇(出度为 0 的顶点);它不必是非循环的。 USO 已作为许多几何优化问题的抽象模型进行研究,例如线性规划、查找给定点集的最小包围球、某些类别的凸规划以及某些线性互补问题。由此可见,USO 的数量为。
LetQddenote the graph of thed-dimensional cube. Aunique-sink orientation(USO) is an orientation ofQdsuch that every face ofQnhas exactly one sink (vertex of out degree 0); it does not have to be acyclic. USO have been studied as an abstract model for many geometric optimization problems, such as linear programming, finding the smallest enclosing ball of a given point set, certain classes of convex programming, and certain linear complementarity problems. It is shown that the number of USO is.