2 papers
math.CO2025
A family of regular integral graphs and its application to the -Queens' graph
Domingos M. Cardoso, Inês Serôdio Costa, Rui Duarte
A family of regular integral graphs introduced in [I.F.S. Costa, The -Queens graph and its generalizations, Ph.D. Thesis, University of Aveiro 2024], denoted by an…
math.CO2025
Lexicographic products and lexicographic powers of graphs -- a walk matrix approach
Domingos M. Cardoso, Paula Carvalho, Helena Gomes +2
The characteristic polynomial and the spectrum of the lexicographic product of graphs , a specific instance of the generalized composition (also called -join), are explici…