preconjgrad
代码说明：
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 method for solving linear equations Ax = b solution twostep: Two iterative methods for solving linear equations Ax = b, Solution fastdown: rapid descent method for solving linear equations Ax = b solution)
文件列表：
preconjgrad
...........\conjgrad.m,447,2008-04-10
...........\fastdown.m,289,2008-04-10
...........\preconjgrad.m,458,2008-04-10
...........\readme.txt,172,2011-05-23
...........\twostep.m,565,2006-11-04
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