Extension of bridge graphs and their chemical applications

Abstract

Abstract A topological invariant is a numerical value which can be associated with a graph structure. These graph invariants are utilized for modeling information of molecules in structural chemistry and biology. Over the years many topological indices are proposed and studied based on degree, distance and other parameters of graph. Also graph invariants play a significant role in chemistry, especially, QSPR/QSAR studies. In this paper, we concentrate two graph invariants such as augmented Zagreb invariant and inverse sum indeg invariant of extended bridge graphs.