On adjacency and (signless) Laplacian spectra of centralizer and co-centralizer graphs of some finite non-abelian groups

Jharna Kalita, Somnath Paul

Let $G$ be a finite non abelian group. The centralizer graph of $G$ is a simple undirected graph ${\Gamma }_{cent}(G)$, whose vertices are the proper centralizers of $G$ and two vertices a…