2 papers
math.CO2021
Signed -graphs with few eigenvalues and a symmetric spectrum
Gary R. W. Greaves, Zoran Stanić
We investigate properties of signed graphs that have few distinct eigenvalues together with a symmetric spectrum. Our main contribution is to determine all signed -graphs wi…
math.CO2020
The main vertices of a star set and related graph parameters
Milica Anđelić, Domingos M. Cardoso, Slobodan K. Simi\' c +1
A vertex is called -main if it belongs to a star set of the eigenvalue of a graph and this eigenvalue is main for the graph obtained from $…