On The Group Theory Of The Characteristic π - Theory

Based on existing results in the literature, the characteristics of the group theory of characters are further discussed. First of all, the definition of ?? special characters have given us enlightment, we obtain the characteristics of ?? special characters. Secondly, we obtain the characteristics of B??characters on the basis of the conclusions in the second chapter. The maximal subnormal pair generalizes the definition of B?? characters, in the end, so we discus characteristics of maximal ?-factorable subnormal pair(for details see theorem F).