几个简单的计算线性方程系数矩阵分解的算法，包括cholesky、doolittle、等-The calculation of a few simple linear equations coefficient matrix factorization algorithms, including cholesky, doolittle, etc.

一个很好的程序：高斯列选主元法解多元线性方程-A very good program: Gaussian out how the main multi-element method solution of linear equations