Large sets of Hamilton cycle decompositions of complete bipartite graphs

Let K"2"t"+"1","2"t"+"1-I denote the complete bipartite graph K"2"t"+"1","2"t"+"1 minus a 1-factor. In this paper, we prove that there exist a large set of Hamilton cycle decomposition of K"2"t","2"t and a large set of Hamilton cycle decomposition of K"2"t"+"1","2"t"+"1-I.