For a graph G, we here investigate its signless Laplacian matrix 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.
On graphs with exactly three Q-eigenvalues at least two / Wang, Jianfeng; Belardo, Francesco; Wang, Wei; Huang, Qiongxiang. - In: LINEAR ALGEBRA AND ITS APPLICATIONS. - ISSN 0024-3795. - 438:7(2013), pp. 2861-2879. [10.1016/j.laa.2012.11.032]
On graphs with exactly three Q-eigenvalues at least two
BELARDO, Francesco;
2013
Abstract
For a graph G, we here investigate its signless Laplacian matrix 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.File in questo prodotto:
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