F-index of graphs based on four operations related to the lexicographic product
Authors :
Nilanjan De 1 *
Author Address :
1 Calcutta Institute of Engineering and Management, Kolkata, India.
Abstract :
A new branch of mathematical chemistry, known as chemical graph theory which deals with the non trivial applications of graph theory to solve molecular problems. A topological index of a graph is a real number which is fixed under graph isomorphism. The forgotten topological index or F-index of a graph is defined as the sum of cubes of the degree of all the vertices of the graph. In this paper we study the F-index of four operations related to the lexicographic product on graphs
Keywords :
Topological indices, Graph operations, Lexicographic product.
DOI :
Article Info :
Received : October 15, 2019; Accepted : March 11, 2020.
