The adjacency spectrum of two new operations of graphs

Let be a graph and be its adjacency matrix. The eigenvalues of are the eigenvalues of and form the adjacency spectrum, denoted by . In this paper, we introduce two new operations and , and describe the adjacency spectra of and of regular graphs , and arbitrarily graphs , in terms of their adjacency...

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Bibliographic Details
Main Authors: Dijian Wang, Yaoping Hou, Zikai Tang
Format: Article
Language:English
Published: Taylor & Francis Group 2018-12-01
Series:AKCE International Journal of Graphs and Combinatorics
Subjects:
Online Access:http://dx.doi.org/10.1016/j.akcej.2017.10.004
Description
Summary:Let be a graph and be its adjacency matrix. The eigenvalues of are the eigenvalues of and form the adjacency spectrum, denoted by . In this paper, we introduce two new operations and , and describe the adjacency spectra of and of regular graphs , and arbitrarily graphs , in terms of their adjacency spectra. As the applications, we obtain some new integral spectrum graphs.
ISSN:0972-8600