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Elsevier, Linear Algebra and its Applications, 7(438), p. 2861-2879, 2013

DOI: 10.1016/j.laa.2012.11.032

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On graphs with exactly three Q-eigenvalues at least two

Journal article published in 2013 by JianFeng Wang, Francesco Belardo ORCID, Wei Wang, QiongXiang Huang
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

For a graph G, we here investigate its signless Laplacian matrix Q(G)Q(G) and the corresponding Q-eigenvalues. By considering the relation between the Q-spectrum and the circumference of G, we characterize all connected graphs with exactly three Q-eigenvalues at least two.