Newton法的本质就是不断用切线来近似曲线，因此，Newton法也称为切线方法。本程序用Newton法求解n元正定函数的最小值，例子在程序中。-The essence of Newton method is used constantly to approximate tangent curve, therefore, Newton method, also known as tangent method. This procedure using Newton method to solve n-positive definite function of the minimum value, for example, in the proceedings.