fortran CG-FFT程序 Conjugate gradient package for solving complex matrix equations -fortran CG-FFT procedures Conjugate gradient pack age for solving complex matrix equations

采用CG法求解稀疏对称非奇异矩阵得到的线性系统Ax=b-Implementation of a conjugate-gradient type method for solving sparse linear equations: Solve Ax = b or (A- sI)x = b. The matrix A- sI must be symmetric and nonsingular, but it may be definite or indefinite. The scal

利用共轭梯度法（CG+）求解大规模无约束最优化问题，代代码所用语言为Fortran77.， -The conjugate gradient method (CG+) for solving large-scale unconstrained optimization problems, the generation of code language is Fortran 77.

代码中有Jacobi, Gauss-Seidel,SSOR ,CG, Steppest descent 的fortran实现(this file tell you how to implement Jacobi, Gauss-Seidel,SSOR ,CG, Steppest descent by fortran)