AX=b(M-NX=bMX=NX+b 计算格式：X+I)=BX+f(B=M1N) 设方程组的精确解为X*,则有 X*=BX*+f X+)-X*=BX内-X*) 记8因=X-X*(k=0,1,2,3,·) 则有 E(k+1)=B e(k) k=B6k-1)（k=1,2,3, … 33 A X = b  (M–N )X = b  M X = N X + b 记  (k) = X(k) – X* ( k = 0, 1, 2, 3, ······ ) 则有  (k+1) = B  (k)  (k) = B  (k-1) ( k = 1, 2, 3, ······ ) 计算格式: X(k+1) = B X(k) + f ( B = M-1N ) X(k+1) – X*= B(X(k) – X*) 设方程组的精确解为 X* ,则有 X* = B X* + f 