preconjgrad：预处理共轭梯度法求线性方程组Ax=b的解 conjgrad：共轭梯度法求线性方程组Ax=b的解 twostep:两部迭代法求线性方程组Ax=b的解 fastdown:快速下降法求线性方程组Ax=b的解-preconjgrad: preconditioned conjugate gradient method for solving linear equations Ax = b solution conjgrad: conjugate gradient met

对称GS迭代预处理共轭梯度法，数值分析方法之一，数值模拟-The symmetric GS iterative preconditioned conjugate gradient method, one of the methods of numerical analysis, numerical simulation

matlab 实现几个常用的解线性方程组的数值算法。包括共轭梯度法、预处理共轭梯度法、SOR、Lanczos.-matlab implementation of several commonly used numerical algorithm for solving linear equations. Including the conjugate gradient method, preconditioned conjugate gradient method, SOR, Lanczos.

Preconditioned conjugate gradient method for 2D poisson equation