f(1;)f(41) f(41) f(4;) ( (m2-2) f(1) f(A)=ΣaPP=P∑akJ k=0 =0                  − − = − − ( ) ( ) ( 2)! 1 ( ) ( ) ( 1)! 1 ( ) 1! 1 ( ) ( 2) ' ( 1) i i m i i i m i i i f f m f f m f f i i           =   = − 0 1 ( ) k k f A ak PJ P 1 0 −  =         = P a J P k k k