The Randi(c) Index of Chain Polyomino Systems with the Number of Turned Squares Being Two
Xiaoling Ke · Journal of Sanming University · 2011
The Randi(c) index of a(molecular) graph G is the sum of the weights(d(u)d(ν))■of all edges of,uν of G,where d(u)and d(ν)are the degrees of the vertex u and ν in G.Randi(c) index is one of the ordinary and important topological indices considered in chemical graph theory.In the paper,we obtain the Randi(c) index for chain polyomino systems with the number of turned squares being two.