Narodna in univerzitetna knjižnica, Ljubljana (NUK)
  • Sharp spectral inequalities for connected bipartite graphs with maximal ▫$Q$▫-index
    Anđelić, Milica ...
    The ▫$Q$▫-index of a simple graph is the largest eigenvalue of its signless Laplacian. As for the adjacency spectrum, we will show that in the set of connected bipartite graphs with fixed order and ... size, the bipartite graphs with maximal ▫$Q$▫-index are the double nested graphs. We provide a sequence of (in)equalities regarding the principal eigenvector of the signless Laplacian of double nested graphs and apply these results to obtain some lower and upperbounds for their ▫$Q$▫-index. In the end, we give some computational results in order to compare these bounds.
    Vir: Ars mathematica contemporanea : special issue Bled'11 (Vol. 6, no. 1, 2013, str. 171-185)
    Vrsta gradiva - prispevek na konferenci ; neleposlovje za odrasle
    Leto - 2013
    Jezik - angleški
    COBISS.SI-ID - 16471641

vir: Ars mathematica contemporanea : special issue Bled'11 (Vol. 6, no. 1, 2013, str. 171-185)

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