M. Freitas

collaborators

2 papers

math.SP2018

Lower bounds for Laplacian spread and relations with invariant parameters revisited

Enide Andrade, Maria Aguieiras A. de Freitas, María Robbiano +1

Let $G = (V (G), E (G))$ be an $(n, m)$ -graph and $X$ a nonempty proper subset of $V (G)$ . Let $X^{c}=V\left( G\right) \ba…

math.CO2015

Maxima of the Q-index: graphs with no K_s,t

Maria Aguieiras A. de Freitas, Vladimir Nikiforov, Laura Patuzzi

This note presents a new spectral version of the graph Zarankiewicz problem: How large can be the maximum eigenvalue of the signless Laplacian of a graph of order $n$ that does not…