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Interlacing eigenvalues on some operations of graphs

✍ Scribed by Bao-Feng Wu; Jia-Yu Shao; Yue Liu


Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
257 KB
Volume
430
Category
Article
ISSN
0024-3795

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✦ Synopsis


In this paper, we focus on some operations of graphs and give a kind of eigenvalue interlacing in terms of the adjacency matrix, standard Laplacian, and normalized Laplacian. Also, we explore some applications of this interlacing.


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Let \(G\) be a simple graph with \(p\) vertices and let \(A(G)\) be the adjacency matrix of \(G\). The characteristic polynomial of \(G\) is the characteristic polynomial of \(A(G)\) and roots of the characteristic equation are the eigenvalues of \(G\). In this paper we compute the characteristic po