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arXiv 1408.6196cs.DS
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基于图划分的支配诱导匹配精确算法

Exact Algorithms for Dominating Induced Matching Based on Graph Partition

Mingyu Xiao, Hiroshi Nagamochi

摘要:

具有$n=|V|$顶点和$m=|E|$边的图$G=(V,E)$的支配诱导匹配,也称为有效边支配,是图中边的子集$F \subseteq E$,使得$F$中没有两条边共享公共端点,并且$E\setminus F$中的每条边与$F$中的一条边恰好关联。判定一个图是否存在支配诱导匹配是NP-困难的。本文针对这一问题设计了一个$1.1467^nn^{O(1)}$ -时间精确算法,改进了以往的结果.这个问题可以被重新定义为一个划分问题,即把一个图的顶点集划分为$I$和$F$两部分,其中$I$导出一个独立集(0-正则图),而$F$导出一个完美匹配(1-正则图).在给出问题的几个结构性质后,我们证明了问题总是包含一些“好顶点”,通过将它们分支到$I$或$F$,我们可以有效地减少图形。这导致了一个快速精确的算法来解决这个问题。

英文摘要:

A dominating induced matching, also called an efficient edge domination, of a graph $G=(V,E)$ with $n=|V|$ vertices and $m=|E|$ edges is a subset $F \subseteq E$ of edges in the graph such that no two edges in $F$ share a common endpoint and each edge in $E\setminus F$ is incident with exactly one edge in $F$. It is NP-hard to decide whether a graph admits a dominating induced matching or not. In this paper, we design a $1.1467^nn^{O(1)}$-time exact algorithm for this problem, improving all previous results. This problem can be redefined as a partition problem that is to partition the vertex set of a graph into two parts $I$ and $F$, where $I$ induces an independent set (a 0-regular graph) and $F$ induces a perfect matching (a 1-regular graph). After giving several structural properties of the problem, we show that the problem always contains some "good vertices", branching on which by including them to either $I$ or $F$ we can effectively reduce the graph. This leads to a fast exact algorithm to this problem.

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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