摘要
将一元函数的单调性推广到多元函数上,给出了多元函数单调性的定义,利用方向导数探讨了多元函数关于方向导数的中值公式与多元函数单调性的判定法则,并利用该法则推出了求多元函数的极值的方法.
The monotone of one variable was extended to the multi-function to define the multi-function monotone,and the formula of directional derivative and the rule of judging multi-function monotone were explored via directional derivative to get the way of finding the extreme of multi function.
出处
《宜宾学院学报》
2010年第6期23-25,共3页
Journal of Yibin University
关键词
多元函数
方向导数
单调性
极值
multi-function
directional derivative
monotone
extreme
