设PAP=J=dig(J1,/2,…,J) f(z)=∑ak k=1 k 1k-1 12k-(m;-1) k/i ∑ak ckai-i=   =1 ( ) k k Ji ak Ji f ( , , , ) 1 2 1 s P AP = J = diag J J  J 设 −                =  = − − − − − 1 1 1 1 1 1 ( 1) k k i k k i k i k m i m k k k i k i k C C C a i i         