Study of inverse sum indeg index

Document Type : Original Article


SRTT University


Abstract. Let MG(i,n) denote to the class of all n-vertex molecular graphs with minimum degree i, where 1≤ i ≤3. The inverse sum indeg index of a graph is defined as , where du denotes to the degree of vertex u. In this paper, we propose some extremal molecular graphs with the minimum and the maximum value of inverse sum indeg index in MG(i,n).
Keywords: inverse sum indeg index, molecular graphs, topological index.

Graphical Abstract

Study of inverse sum indeg index


Volume 7, Issue 2
March 2022
Pages 105-111
  • Receive Date: 08 April 2022
  • Revise Date: 15 April 2022
  • Accept Date: 10 May 2022
  • Publish Date: 01 June 2022