线性方程组求解

代码说明：

  利用hermite标准形和满秩分解求矩阵广义逆，并且利用广义逆求解线性方程组，可以判断解的形式(Using Hermite canonical form and full rank decomposition to find the generalized inverse of a matrix, and using the generalized inverse to solve a system of linear equations, the form of the solution can be judged)