摘要
本文首先把一元函数极值从本质上推广到多元函数极值 ,进一步给出了以往教材中没有提到的 ,关于三元函数极值的有效的具体判别方法 .
In this paper,extremum of function of a single variable is essentially expanded to extremum of function of many variables. Furthermore,the auther gives a speific method of extremum of function of three variables that was not mentioned in the former teaching materials.
关键词
极值
向量函数
算子
范数
extremum
vector function
operator
norm
