Kaya, EzgiMaden, A. Dilek2020-03-262020-03-2620170340-6253https://hdl.handle.net/20.500.12395/35342The Co-PI eigenvalues of a connected graph G are the eigenvalues of its Co-PI matrix. In this study, Co-PI energy of a graph is defined as the sum of the absolute values of Co-PI eigenvalues of G. We also give some bounds for the Co-PI spectral radius and the Co-PI energy of graphs.eninfo:eu-repo/semantics/closedAccessArticle773691700Q1WOS:000403523400010Q1