Topological indices are numerical parameters derived from the structural information of
chemical compounds. By providing a quantitative description of molecular structures …

Extremal Sombor Indices of Tetracyclic (Chemical) Graphs Page 1 MATCH
Communications in Mathematical and in Computer Chemistry MATCH Commun. Math …

As a degree-based topological index, the arithmetic–geometric index was firstly introduced
by Shegehall and Kanabur and was defined as AG= AG (G)=∑ uv∈ EG d u+ dv 2 dudv for a …

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 …

The symmetric division deg (SDD) index of a simple graph G is defined as SDD (G)=∑ uv∈
E (G)(du dv+ dv du), where E (G) is the edge set of G and du denotes the degree of the …

For a graph G with vertex set VG and edge set EG, the symmetric division deg index is
defined as SDD (G)=∑ uv∈ EG (dudv+ dvdu), where du denotes the degree of vertex u in …

The subtree number index of a graph, defined as the number of subtrees, attracts much
attention recently. Finding a proper algorithm to compute this index is an important but …

Molecular descriptors are essential tools that bridge the gap between chemical structures
and their properties. Among these, the Randić index (R), geometric-arithmetic index (GA) …

The main concern of this article is to present the complete classification of tetracyclic
(chemical) graphs and establishing some extremal results with respect to the geometric …

The geometric–arithmetic index GA of a graph is defined as sum of weights of all edges of
graph. The weight of one edge is quotient of the geometric and arithmetic mean of degrees …