On the largest eigenvalue of non-regular graphs

On the largest eigenvalue of non-regular graphs
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DOI:
10.1016/j.jctb.2007.02.008
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发表时间:
2007-11
期刊:
J. Comb. Theory B
影响因子:
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通讯作者:
Bolian Liu;Jian Shen;Xinmao Wang
Bolian Liu;Jian Shen;Xinmao Wang
中科院分区:
其他
文献类型:
--
作者:
Bolian Liu;Jian Shen;Xinmao Wang

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研究了连通非正则图的谱半径。设λ1(n,Δ)为所有有n个顶点和最大度的连通非正则图的最大谱半径Δ。证明了Δ−λ1(n,Δ)=Θ(Δ/n2)。这改进了斯特瓦诺维奇和张最近分别得出的两个结果。
We study the spectral radius of connected non-regular graphs. Let λ1(n,Δ) be the maximum spectral radius among all connected non-regular graphs with n vertices and maximum degree Δ. We prove that Δ−λ1(n,Δ)=Θ(Δ/n2). This improves two recent results by Stevanović and Zhang, respectively.