A Congruence Relation for Wiener and Szeged Indices

Ivan Gutman, Kexiang Xu, Muhuo Liu

In a recent paper [H. Lin, MATCH Communications in Mathematical and in Computer Chemistry 70 (2013) 575–582], a congruence relation for Wiener indices of a class of trees was reported. We now show that Lin's congruence is a special case of a much more general result.