Elliptic Sombor Index of Graphs From Primary Subgraphs

Suppose that G is a connected graph constructed from pairwise disjoint connected graphs G1,... ,Gt by selecting a vertex of G1, a vertex of G2, and identifying these two vertices. Then continue in this manner inductively. The graphs G1,... ,Gk are the primary subgraphs of G. Some particular cases of these graphs are important in chemistry which we consider them in this paper and study their elliptic Sombor index.