O. Rojo

most citedComputing the

A_{α} -

eigenvalues of a bug

1 citations · 1 across the 2 of their papers we have counts for

collaborators

3 papers

math.RA2019

Centrosymmetric nonnegative realization of spectra

Ana I. Julio, Oscar Rojo, Ricardo L. Soto

A list $Λ = {λ_{1}, λ_{2}, \dots, λ_{n}}$ of complex numbers is said to be realizable if it is the spectrum of an entrywise nonnegative matrix. In this paper we intent to characteri…

math.CO2017

On the $α$ -index of graphs with pendent paths

Vladimir Nikiforov, Oscar Rojo

Let $G$ be a graph with adjacency matrix $A (G)$ and let $D (G)$ be the diagonal matrix of the degrees of $G$ . For every real $α \in [0, 1]$ , write $A_{α} (G)$ fo…

math.CO2017★ 1 cited

Computing the $A_{α} -$ eigenvalues of a bug

Oscar Rojo

Let $G$ be a simple undirected graph. For $α \in [0, 1]$ , let \begin{equation*} A_α\left( G\right) =αD\left( G\right) +(1-α)A\left( G\right) , \end{equation*} where $A (G)$ is the adj…

Centrosymmetric nonnegative realization of spectra

On the α-index of graphs with pendent paths

Computing the Aα​− eigenvalues of a bug

On the $α$ -index of graphs with pendent paths

Computing the $A_{α} -$ eigenvalues of a bug