This work was supported by the National Natural Science Foundation of China (Grant No.10271094);"Hundred Talent"Program of the Chinese Academy of Sciences
Let G be a finite abelian group and its Sylow p-subgroup a direct product of copies of a cyclic group of order p r , i.e., a finite homocyclic abelian group. Let Δ n (G) denote the n-th power of the augmentation ide...