二元函数的极值点和鞍点

The Point of Extreme value and Saddle Point in Duality Function

本文用一元函数求极值的方法,解决了二元函数极值问题,给出二元函数的鞍点概念及其鞍点存在的必要条件和判定鞍点的充分条件。

In the article, the teaching of senior I on mechanics is introduced, according to my own long experiecne. I believe that we should carry out aim-teaching, and teach students in accordance with their apititude, lecture slowly and easily, stimulate their interests on physics in order to improve the teaching quality.