矩阵的crout分解，将矩阵分解为下三角矩阵和上三角矩阵的乘积，其中上三角矩阵为单位上三角矩阵。-Matrix crout decomposition, the matrix into a lower triangular matrix and upper triangular matrices, in which the upper triangular matrix is ​ ​ the upper triangular matrix.