The two Zagreb indices M 1=∑ vd (v) 2 and M 2=∑ uvd (u) d (v) are vertex-degree-based
graph invariants that have been introduced in the 1970s and extensively studied ever since …

The spread of novel virus SARS‐CoV‐2, well known as COVID‐19 has become a major
health issue currently which has turned up to a pandemic worldwide. The treatment …

Degree-Based Topological Indices† Page 1 † Dedicated to Professor Douglas Jay Klein on
the occasion of his 70th birthday. CROATICA CHEMICA ACTA CCACAA, ISSN 0011-1643 …

Özet If G is a graph on n vertices, and d (i) is the degree of its i-th vertex, then the Randic
matrix of G is the square matrix of order n whose (i, j)-entry is equal to 1/root d (i) d (j) di if the …

Divided into five sections, this book offers 200 graph-theoretical matrices covering
adjacency and related matrices, distance and related matrices, incidence matrices, and …

Topological indices (TIs) can be used to forecast molecules' biological activity,
physicochemical features, and toxicity. The use of topological indices and regression …

The first and second Zagreb indices of a graph are equal, respectively, to the sum of squares
of the vertex degrees, and the sum of the products of the degrees of pairs of adjacent …

A molecular structure can be described by a parameter, polynomial or matrix. The physico-
chemical features, bio-activities of a chemical compound are predicted using the numerical …

For a (molecular) graph G, the first and the second entire Zagreb indices are defined by the
formulas M 1 ε G=∑ x∈ VG∪ EG dx 2 and M 2 ε G=∑ x is either adjacent or incident to …

In the fields of chemical graph theory (CGT), mathematical chemistry and molecular
topology, a~ topological index (TI) also known as a connectivity~ index~ is a type of a …