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arXiv 2008.03131cs.DS
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次闭图族中$k$ -圈的$2^{O(k)}n$算法

A $2^{O(k)}n$ algorithm for $k$-cycle in minor-closed graph families

Raphael Yuster

摘要:

设${\mathcal C}$是一个真次闭图族。给出了一个随机算法,给定一个具有$n$顶点的图$G \in {\mathcal C}$,在$2^{O(k)}n$时间内在$G$(如果存在)中找到一个大小为$k$的简单圈.该算法适用于有向图和无向图。在以前的线性时间算法中,运行时间对$k$的依赖性是超指数的。该算法可以被去随机化,从而产生$2^{O(k)}n\log n$时间算法。

英文摘要:

Let ${\mathcal C}$ be a proper minor-closed family of graphs. We present a randomized algorithm that given a graph $G \in {\mathcal C}$ with $n$ vertices, finds a simple cycle of size $k$ in $G$ (if exists) in $2^{O(k)}n$ time. The algorithm applies to both directed and undirected graphs. In previous linear time algorithms for this problem, the runtime dependence on $k$ is super-exponential. The algorithm can be derandomized yielding a $2^{O(k)}n\log n$ time algorithm.

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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