Óscar Rojo

most citedEigenvalues of a H-generalized join graph operation constrained by vertex subsets

1 citations · 2 across the 3 of their papers we have counts for

collaborators

3 papers

math.CO2016

A note on the positive semidefinitness of $A_{α} (G)$

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.CO2016★ 1 cited

On the $A_{α}$ -spectra of trees

Vladimir Nikiforov, Germain Pastén, Oscar Rojo +1

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 $α \in [0, 1],$ define the matrix $A_α\left(G\r…

math.CO2012★ 1 cited

Eigenvalues of a H-generalized join graph operation constrained by vertex subsets

Domingos M. Cardoso, Enide A. Martins, Maria Robbiano +1

Considering a graph $H$ of order $p$ , a generalized $H$ -join operation of a family of graphs $G_{1}, ..., G_{p}$ , constrained by a family of vertex subsets $S_{i} \subseteq V (G_{i})$ , $i=1,…

A note on the positive semidefinitness of Aα​(G)

On the Aα​-spectra of trees

Eigenvalues of a H-generalized join graph operation constrained by vertex subsets

A note on the positive semidefinitness of $A_{α} (G)$

On the $A_{α}$ -spectra of trees