西要毛子律技大学XIDIAN UNIVERSITY+000元A(2) =:. D,(a) = a(a+1).0 (a+1)0.又 D;(a)=[A(a)|=(+1)°.所以，A(α)的不变因子为:D,(a)d(a)=D(a)=1, d,(a)2+1D,(a)D,(a)a(a+1)d.(a)=D,(a)( ) ( ) 2  = + D    1 . 又 ( ) ( ) ( ) 3 2 3 D A     = = + 1 . 所以， A( ) 的不变因子为 ： ( ) ( ) ( ) ( ) ( ) ( ) 2 1 1 2 1 1, 1 , D d D d D        = = = = + ( ) ( ) ( ) ( ) 2 3 3 2 1 . D d D      = = + ( ) 2 2 0 0 ( ) 0 0 0 0 1 A        +   =     +  