The Laplacian spectral radius of graphs on surfaces

The Laplacian spectral radius of graphs on surfaces
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DOI:
10.1016/j.laa.2007.08.032
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发表时间:
2008-02
影响因子:
1.1
通讯作者:
Liang Lin
Liang Lin
中科院分区:
数学3区
文献类型:
--
作者:
Liang Lin

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设G是一个n顶点(n小于3)的简单图,可嵌入欧拉属γ的表面(交叉的数量加上手柄数量的两倍)。用Δ表示G的最大度。本文首先给出了G的拉普拉斯谱半径的两个上界,并给出了外平面图和Halin图的拉普拉斯谱半径的上界。
Let G be an n-vertex (n⩾3) simple graph embeddable on a surface of Euler genus γ (the number of crosscaps plus twice the number of handles). Denote by Δ the maximum degree of G. In this paper, we first present two upper bounds on the Laplacian spectral radius of G as follows: Some upper bounds on the Laplacian spectral radius of the outerplanar and Halin graphs are also given.