Geodesic
The maximum clique and the signless Laplacian eigenvalues
Czechoslovak Mathematical Journal, Tome 58 (2008) no. 4, pp. 1233-1240.

Voir la notice de l'article provenant de la source Czech Digital Mathematics Library

Lower and upper bounds are obtained for the clique number $\omega (G)$ and the independence number $\alpha (G)$, in terms of the eigenvalues of the signless Laplacian matrix of a graph $G$.
Classification : 05C50, 05C69
Keywords: bound; clique number; independence number; signless Laplacian eigenvalues 
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     author = {Liu, Jianping and Liu, BoLian},
     title = {The maximum clique and the signless {Laplacian} eigenvalues},
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Liu, Jianping; Liu, BoLian. The maximum clique and the signless Laplacian eigenvalues. Czechoslovak Mathematical Journal, Tome 58 (2008) no. 4, pp. 1233-1240. http://geodesic.mathdoc.fr/item/CMJ_2008__58_4_a26/