arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2301.09247cs.DScs.DM
收藏

最小权$(1,m)$的一种新的近似算法--连通支配集

A New Approximation Algorithm for Minimum-Weight $(1,m)$--Connected Dominating Set

Jiao Zhou, Yingli Ran, Panos M. Pardalos, Zhao Zhang, Shaojie Tang, Ding-Zhu Du

摘要:

考虑一个节点权重非负的图。一个顶点子集称为连通支配集(CDS),如果每隔一个节点至少有一个邻居的子集,并导致一个连通子图。此外,如果每隔一个节点在子集中至少具有$m$个邻居,则该节点子集被称为$(1,m)$ CDS。最小权值$(1,m)$ CDS问题的目标是找到一个具有最小总节点权值的$(1,m)$ CDS。本文对这一问题提出了一个新的多项式时间近似算法,其近似比为$2H(δ_{\max}+m-1)$,其中$δ_{\max}$是给定图的最大度,$H(\cdot)$是调和函数,即,$H(k)=\sum_{i=1}^k \frac{1}{i}$。

英文摘要:

Consider a graph with nonnegative node weight. A vertex subset is called a CDS (connected dominating set) if every other node has at least one neighbor in the subset and the subset induces a connected subgraph. Furthermore, if every other node has at least $m$ neighbors in the subset, then the node subset is called a $(1,m)$CDS. The minimum-weight $(1,m)$CDS problem aims at finding a $(1,m)$CDS with minimum total node weight. In this paper, we present a new polynomial-time approximation algorithm for this problem with approximation ratio $2H(δ_{\max}+m-1)$, where $δ_{\max}$ is the maximum degree of the given graph and $H(\cdot)$ is the Harmonic function, i.e., $H(k)=\sum_{i=1}^k \frac{1}{i}$.

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。

↑