All properties of organic moleculessphysical, chemical, biological, and
technologicalsdepend on their chemical structure and vary with it in a systematic way. The …

Zagreb indices were reformulated in terms of the edge-degrees instead of the vertex-
degrees as the original Zagreb indices. Three types of Zagreb indices were considered …

In theoretical medicine, topological indices are defined to test the medicine and pharmacy
characteristics, such as melting point, boiling point, toxicity and other biological activities. As …

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

A new class of distance-based molecular structure descriptors is put forward, aimed at
eliminating a general shortcoming of the Wiener and Wiener-type indices, namely that the …

The Estrada index of a graph/network is defined as the trace of the adjacency matrix
exponential. It has been extended to other graph-theoretic matrices, such as the Laplacian …

This book covers the basic aspects of mathematical chemistry involving chemical graph
theory, with special emphasis and reference to the work of Prof. Milan Randić. It presents the …

The Harary index is defined as the sum of reciprocals of distances between all pairs of
vertices of a connected graph. For a connected graph G=(V, E) and two nonadjacent vertices …

On Topological Indices and Their Reciprocals 1 Introduction Page 1 MATCH Communications
in Mathematical and in Computer Chemistry MATCH Commun. Math. Comput. Chem. 91 …

In this paper, we study a new graph invariant named reciprocal degree distance (RDD),
defined for a connected graph G as vertex-degree-weighted sum of the reciprocal distances …