A Note on the First Geometric-Arithmetic Index of Hexagonal Systems and Phenylenes
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Abstract:
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.
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a note on the first geometric-arithmetic index of hexagonal systems and phenylenes
the first geometric-arithmetic index was introduced in the chemical theory as the summationof 2 du dv /(du dv ) overall edges of the graph, where du stand for the degree of the vertexu. in this paper we give the expressions for computing the first geometric-arithmetic index ofhexagonal systems and phenylenes and present new method for describing hexagonal systemby corresponding a simple graph...
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Journal title
volume 2 issue 2
pages 101- 108
publication date 2011-12-01
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