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北美退伍军人节(Veterans Day),12 日无更新
arXiv 2212.01017math.CO
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具有给定控制数的图的最小谱半径

The minimum spectral radius of graphs with a given domination number

Chang Liu, Jianping Li

摘要:

设$\mathbb{G}_{n,γ}$是控制数为$γ$且顶点数为$n$的简单连通图的集合.在$\mathbb{G}_{n,γ}$中具有最小谱半径的图称为极小图。本文首先证明了$\mathbb{G}_{n,γ}$的极小图必为树。此外,对于$γ\in\{1,2,3,\lceil\frac{n}{3}\rceil,\lfloor\frac{n}{2}\rfloor\}$,我们刻画了$\mathbb{G}_{n,γ}$中的所有极小图.

英文摘要:

Let $\mathbb{G}_{n,γ}$ be the set of simple and connected graphs on $n$ vertices and with domination number $γ$. The graph with minimum spectral radius among $\mathbb{G}_{n,γ}$ is called the minimizer graph. In this paper, we first prove that the minimizer graph of $\mathbb{G}_{n,γ}$ must be a tree. Moreover, for $γ\in\{1,2,3,\lceil\frac{n}{3}\rceil,\lfloor\frac{n}{2}\rfloor\}$, we characterize all minimizer graphs in $\mathbb{G}_{n,γ}$.

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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