Preconditioned Sparse Iterative Ax=b Solver.Routine to solve a general linear system Ax = b using the Preconditioned method.-Preconditioned Sparse Iterative Ax=b Solver.Routine to solve a general linear system Ax = b using the Preconditioned method

高斯列主元素消去法求解矩阵方程AX B,其中A是N N的矩阵,B是N M矩阵 输入 n----方阵A的行数 a----矩阵()