矩阵和初等几何常用算法，包括高斯-约当法求逆矩阵、用乔里斯基分解法求对称正定阵的线性方程组等等的源代码-Matrix and elementary geometry commonly used algorithms, including Gaussian- about when the inverse matrix method, using乔里斯基decomposition method for symmetric positive definite matrix of linear equa