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   A Note on the First Geometric-Arithmetic Index of Hexagonal Systems and Phenylenes  
نویسنده Yarahmadi Zahra
منبع Iranian Journal Of Mathematical Chemistry - 2011 - دوره : 2 - شماره : 2 - صفحه:101 -108
چکیده    The first geometric-arithmetic index was introduced in the chemical theory as the summation of 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.
کلیدواژه Geometric-Arithmetic Index ,Hexagonal System ,Phenylenes
آدرس Islamic Azad University, I. R. Iran
پست الکترونیکی z.yarahmadi@mail.iaukho.ir

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