%0 Journal Article
%T A Note on the First Geometric-Arithmetic Index of Hexagonal Systems and Phenylenes
%J Iranian Journal of Mathematical Chemistry
%I University of Kashan
%Z 2228-6489
%A YARAHMADI, Z.
%D 2011
%\ 12/01/2011
%V 2
%N 2
%P 101-108
%! A Note on the First Geometric-Arithmetic Index of Hexagonal Systems and Phenylenes
%K Geometric-arithmetic index
%K Hexagonal system
%K Phenylenes
%R 10.22052/ijmc.2011.5217
%X The first geometric-arithmetic index was introduced in the chemical theory as the summation of 2 du dv /(du dv ) overall edges of the graph, where du stand for the degree of the vertex u. In this paper we give the expressions for computing the first geometric-arithmetic index of hexagonal systems and phenylenes and present new method for describing hexagonal system by corresponding a simple graph to each hexagonal system.
%U http://ijmc.kashanu.ac.ir/article_5217_cf559f5adb428efd20c49b760ad4806e.pdf