On the Geometric-Arithmetic Index Articles uri icon

publication date

  • July 2015

start page

  • 103

end page

  • 120

issue

  • 1

volume

  • 74

international standard serial number (ISSN)

  • 0340-6253

abstract

  • The concept of geometric-arithmetic index was introduced in the chemical graph theory recently, but it has shown to be useful. The aim of this paper is to obtain new inequalities involving the geometric-arithmetic index GA1 and characterize graphs extremal with respect to them. In particular, we improve some known inequalities and we relate GA1 to other well known topological indices.