摘要
将多元函数在有向光滑曲线上的增量与在某点处的方向导数联系起来得到一个多元函数的中值定理。
In this paper, a m idvalue theorem offunction ofm ultivariables is proposed byconnecting the increm ent of the function w ith directional derivative in a directed sm oothcurve, and som e results ofstudying properties of function are obtained by use of directionalderivative.
出处
《西安文理学院学报（社会科学版）》
1999年第2期54-57,共4页
Journal of Xi’an University(Social Sciences Edition)
关键词
中值定理
方向导数
Midvalue Theorem
Directional Derivative
