
arXiv: 1608.06998
The atom-bond connectivity (ABC) index is a degree-based topological index. It was introduced due to its applications in modeling the properties of certain molecular structures and has been since extensively studied. In this note, we examine the influence on the extremal values of the ABC index by various graph parameters. More specifically, we consider the maximum ABC index of connected graphs of given order, with fixed independence number, number of pendent vertices, chromatic number and edge-connectivity respectively. We provide characterizations of extremal structures as well as some conjectures. Numerical analysis of the extremal values are also presented.
16 pages, 4figures
Connectivity, Extremal problems in graph theory, Vertex degrees, Vertex subsets with special properties (dominating sets, independent sets, cliques, etc.), Coloring of graphs and hypergraphs, atom-bond connectivity index, chromatic number, FOS: Mathematics, Mathematics - Combinatorics, Combinatorics (math.CO), independence number, edge-connectivity, 05C05, 05C30, pendent vertices
Connectivity, Extremal problems in graph theory, Vertex degrees, Vertex subsets with special properties (dominating sets, independent sets, cliques, etc.), Coloring of graphs and hypergraphs, atom-bond connectivity index, chromatic number, FOS: Mathematics, Mathematics - Combinatorics, Combinatorics (math.CO), independence number, edge-connectivity, 05C05, 05C30, pendent vertices
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