使用：Gauss消元，列主元Gauss消元，平方根法（对称阵），改进的平方根法

解著名的病态矩阵Hilbert矩阵为系数的方程-Use: Gauss elimination, Gauss out PCA elimination, the square root law (symmetric matrix), the square root method for improved well-known pathological matrix for the coefficient matrix Hilbert equation