Maxima of the Q-index: Abstract graph properties
Let q (G) denote the spectral radius of the signless Laplacian matrix of a graph G, also known as the Q-index of G. The aim of this note is to study a general extremal problem.
Electronic Journal of Linear Algebra
De Abreu, N., & Nikiforov, V. (2012). Maxima of the Q-index: Abstract graph properties. Electronic Journal of Linear Algebra, 23, 782-789. https://doi.org/10.13001/1081-3810.1556