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arXiv · 2409.14138

A Brualdi-Hoffman-Tur\'{a}n problem for friendship graph

Fan Chen·Xiying Yuan
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Abstract

A graph is said to be $H$-free if it does not contain $H$ as a subgraph. Brualdi-Hoffman-Tur\'{a}n type problem is to determine the maximum spectral radius of an $H$-free graph $G$ with give size $m$. The $F_k$ is the graph consisting of $k$ triangles that intersect in exactly one common vertex, which is known as the friendship graph. In this paper, we resolve a conjecture (the Brualdi-Hoffman-Tur\'{a}n-type problem for $F_k$) of Li, Lu and Peng [Discrete Math. 346 (2023) 113680] by using the $k$-core technique presented in Li, Zhai and Shu [European J. Combin, 120 (2024) 103966].

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Fan Chen, Xiying Yuan. 2024-09-21. A Brualdi-Hoffman-Tur\'{a}n problem for friendship graph. https://arxiv.org/abs/2409.14138

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