University of KashanIranian Journal of Mathematical Chemistry2228-64896120150301Bounds for the Co-PI Index of a Graph113892310.22052/ijmc.2015.8923ENE. KayaIgdir University
Science and Literature Faculty
Department of MathematicsA. D. MadenSelcuk University
Science Faculty
Department of MathematicsJournal Article20141010In this paper, we present some inequalities for the Co-PI index involving the some topological indices, the number of vertices and edges, and the maximum degree. After that, we give a result for trees. In addition, we give some inequalities for the largest eigenvalue of the Co-PI matrix of G.https://ijmc.kashanu.ac.ir/article_8923_8d3d8f796557f8a3f0ae41e7b0dbc854.pdf