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arXiv 1303.0944math.COcs.DM
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全域图:阈值图的推广及其与阈值超图的联系

Total Domishold Graphs: a Generalization of Threshold Graphs, with Connections to Threshold Hypergraphs

Nina Chiarelli, Martin Milanic

摘要:

一个图的全控制集是一个顶点的集合,使得图的每个顶点都有一个邻居。我们介绍和研究图,承认非负的实权重与它们的顶点,使得一组顶点是一个总的支配集,当且仅当相应的权重之和超过一定的阈值。我们表明,这些图,我们称之为全domishold图,形成一个非遗传类的图适当地包含阈值图和domishold图的补类,并密切相关的阈值布尔函数和阈值超图。本文给出了一个多项式时间的全域图的识别算法,并刻画了上述性质在遗传意义下成立的图。我们的特征是通过研究一个新的家庭的超图,定义类似的Sperner超图,这可能是独立的利益。

英文摘要:

A total dominating set in a graph is a set of vertices such that every vertex of the graph has a neighbor in the set. We introduce and study graphs that admit non-negative real weights associated to their vertices such that a set of vertices is a total dominating set if and only if the sum of the corresponding weights exceeds a certain threshold. We show that these graphs, which we call total domishold graphs, form a non-hereditary class of graphs properly containing the classes of threshold graphs and the complements of domishold graphs, and are closely related to threshold Boolean functions and threshold hypergraphs. We present a polynomial time recognition algorithm of total domishold graphs, and characterize graphs in which the above property holds in a hereditary sense. Our characterization is obtained by studying a new family of hypergraphs, defined similarly as the Sperner hypergraphs, which may be of independent interest.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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