线性方程组迭代解法,包括SOR，CG ，BICG等-linear system iteration solver

BICG算法，是Krylov子空间的迭代方法之一-The BICG algorithm is one of the Krylov subspace iteration method

In numerical linear algebra, the biconjugate gradient stabilized method, often abbreviated as BiCGSTAB, is an iterative method developed by H. A. van der Vorst for the numerical solution of nonsymmetric linear systems. I

fortran程序包裹很多迭代法，BICG，GMRES等等，很有用。-Basic Iterative Solvers with Reverse Communication