Liliana Costa

collaborators

2 papers

math.CO2025

Bounds on $A_{I^} \pm$ -eigenvalues using graph invariants

JoÃ£o Domingos Gomes da Silva Junior, Carla Silva Oliveira, Liliana Manuela Gaspar Cerveira da Costa

In 2017, Nikiforov introduced the concept of the $A_{I^} \pm$ -matrix, as a linear convex combination of the adjacency matrix and the degree diagonal matrix of a graph. This matrix has at…

cs.DM2024

Some results involving the $A_{I^} \pm$ -eigenvalues for graphs and line graphs

Joao Domingos Gomes da Silva Junior, Carla Silva Oliveira, Liliana Manuela Gaspar C. da Costa

Let $G$ be a simple graph with adjacency matrix $A (G)$ , signless Laplacian matrix $Q (G)$ , degree diagonal matrix $D (G)$ and let $l (G)$ be the line graph of $G$ . In 2017, Nikiforov…

Bounds on AI^​±-eigenvalues using graph invariants

Some results involving the AI^​±-eigenvalues for graphs and line graphs

Bounds on $A_{I^} \pm$ -eigenvalues using graph invariants

Some results involving the $A_{I^} \pm$ -eigenvalues for graphs and line graphs