This work was partially supported by the National Natural Science Foundation of China (Grant No. 10671114);the Natural Science Foundation of Shanxi Province (Grant No. 20051007)
Following Blackburn, Deaconescu and Mann, a group G is called an equilibrated group if for any subgroups H,K of G with HK = KH, either H≤NG(K) or K≤NG(H). Continuing their work and based on the classification of met...