arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1707.02740cs.DS
收藏

长度为4的无圈图中导出匹配的有效计数

Efficient Enumeration of Induced Matchings in a Graph without Cycles with Length Four

Kazuhiro Kurita, Kunihiro Wasa, Takeaki Uno, Hiroki Arimura

摘要:

我们解决诱导匹配枚举问题。边集$M$是图$G =(V,E)$的导出匹配。匹配的计数在文献中得到了广泛的研究,但导出匹配却没有得到足够的重视。一个简单的算法需要$O(|V|)$时间来求解每个解,这是从生成一个子问题的时间开始的。我们研究了局部结构,使我们能够在短时间内产生的子问题,并证明了时间复杂度将是$O(1)$,如果输入图是$C_4$ -免费的。无$C_4$图是指其子图不是长度为4的圈的图.最后,我们证明了有界树宽图和平面图的诱导匹配计数的固定参数易处理性。

英文摘要:

We address the induced matching enumeration problem. An edge set $M$ is an induced matching of a graph $G =(V,E)$. The enumeration of matchings are widely studied in literature, but the induced matching has not been paid much attention. A straightforward algorithm takes $O(|V|)$ time for each solution, that is coming from the time to generate a subproblem. We investigated local structures that enables us to generate subproblems in short time, and proved that the time complexity will be $O(1)$ if the input graph is $C_4$-free. A $C_4$-free graph is a graph any whose subgraph is not a cycle of length four. Finally, we show the fixed parameter tractability of counting induced matchings for graphs with bounded tree-width and planar graphs.

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。

↑