程序采用梯度下降法求解函数最小值，函数系数矩阵分别为50x50和100x100，梯度下降法中，同时采用了精确直线搜索和回溯直线搜索，并比较了两种方法的收敛速度，用图形表示。文件里面有具体问题描述。-Program uses a gradient descent method for solving the minimum, function coefficient matrix are 50x50 and 100x100, gradient descent method, while using the precise linear search linear search and backtracking, and compare the convergence rate of the two methods, using a graphical representation. Documents which have specific descr iption of the problem.