University of KashanIranian Journal of Mathematical Chemistry2228-64892Issue 1 (Special Issue on the Occasion of Mircea V. Diudea's Sixtieth Birthday)20110401The Eccentric Connectivity Index of Some Special Graphs6165516910.22052/ijmc.2011.5169ENM. A.IRANMANESHYazd University, IranR.HAFEZIEHYazd University, IranJournal Article20140422If is a connected graph with vertex set , then the eccentric connectivity index of , , is defined as Σ deg where deg is the degree of a vertex and is its eccentricity. Let A, B and C are families of graphs made by joining to , made by putting instead of each vertex in and made by putting instead of each vertex in , respectively. In this paper we compute the eccentric connectivity index of these families of graphs.https://ijmc.kashanu.ac.ir/article_5169_5b44cd85146f77aa944ddc562bf0add2.pdf