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RECOGNIZING P-3-STRUCTURE - A SWITCHING APPROACH

机译:识别P-3结构 - 切换方法

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A P-3 is a set of three vertices of a graph that induces a chordless path: the P-3-structure of a graph is the set of all P-3's. Chvatal asked If there is a polynomial time algorithm to determine whether an arbitrary three-uniform hypergraph is the P-3-structure of some graph. The answer is yes: we describe such an algorithm. Our algorithm is based on switching (as defined by Seidel), a characterization of graphs with the same P-3-structure, a sufficient condition for P-3-structure uniqueness, and a reduction of a certain partitioning problem to two-satisfiability. (C) 1996 Academic Press, Inc. [References: 12]
机译:P-3是一个图形的三个顶点,它引起了赤弯路径:图的P-3结构是所有P-3的集合。 Chvatal询问是否存在多项式时间算法来确定任意三均匀图是否是某些图形的P-3结构。 答案是肯定的:我们描述了这种算法。 我们的算法基于切换(如Seidel所定义),表征具有相同P-3结构的图表,P-3结构唯一性的足够条件,以及对两个可靠性的某个分区问题的降低。 (c)1996年学术出版社,Inc。[参考文献:12]

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