) 中图学技术大荸学系 University of Science and Technology of China DEPARTMENT OF MATHEMATICS 易知, Jacobi迭代有 (D-L-Ux=b Dx=(L+O)x+b DL+U)x+D b G=DL+0=I-DA,8=Db数 学 系 University of Science and Technology of China DEPARTMENT OF MATHEMATICS 易知，Jacobi迭代有 (D − L −U)x = b Dx = (L +U)x + b x D L U x D b 1 1 ( ) − − = + + G D L U I D A g D b 1 1 1 ( ) , − − −  = + = − =