REDUCED SECOND ZAGREB INDEX OF UNICYCLIC GRAPHS
Recently a novel degree based topological index, reduced second Zagrebindex, defined for any connected graph as follows:
where and are the number of edges incident to the vertices u andv,respectively.We determine the minimum and maximum reduced second Zagreb index in the class of n-vertex unicyclic graphs and characterize the corresponding extremal graphs.
reduced second Zagreb index, unicyclic graphs, Zagreb indices.
