包括插值，函数逼近，矩阵特征值计算，数值微分，数值积分，方程求根， 非线性方程组求解， 解线性方程组的直接法，解线性方程组的迭代法，随机数生成等-Including interpolation, function approximation, eigenvalue computation, numerical differentiation, numerical integration, equation Root, non-linear equations to solve the direc