The matchings and spectral radius of graphs involving minimum degree

The matchings and spectral radius of graphs involving minimum degree
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DOI:
10.1016/j.laa.2023.03.023
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发表时间:
2023-03
影响因子:
1.1
通讯作者:
Wenqian Zhang;Jianfeng Wang;Weifan Wang
Wenqian Zhang;Jianfeng Wang;Weifan Wang
中科院分区:
数学3区
文献类型:
--
作者:
Wenqian Zhang;Jianfeng Wang;Weifan Wang

文献摘要

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设n≥29,k≥2,δ≥1为三个正整数,其中n≥k+ 2, n≡k (mod 2)。本文刻画了n个最小度δ且匹配数最多为n−k 2的顶点上所有连通图中谱半径最大的极值图。这解决了b[10]中提出的一个开放问题。
Let n≥ 29, k≥ 2 and δ≥ 1 be three positive integers, where n≥ k+ 2 and n≡ k (mod 2). In this paper, we characterize the extremal graphs with maximum spectral radius among all connected graphs on n vertices with minimum degree δ and matching number at most n− k 2. This solves an open problem proposed in [10].