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has been cited by the following article:

• TITLE: On Harmonic Index and Diameter of Graphs

  AUTHORS: Jianxi Liu

  KEYWORDS: Harmonic Index; Diameter

  JOURNAL NAME: Journal of Applied Mathematics and Physics, Vol.1 No.3, August 23, 2013

  ABSTRACT: The harmonic index of a graph G is defined as , where d(u) denotes the degree of a vertex u in G. It has been found that the harmonic index correlates well with the Randi c' index and with the π-electronic energy of benzenoid hydrocarbons. In this work, we give several relations between the harmonic index and diameter of graphs.