光滑曲面的角型鞍点存在与判定条件

The Condition of Existance And Determination of The Anglar Saddle Point of The Smooth Curved Surface

本文给出了较[1]更一般的曲面鞍点概念,得到了曲面的角型鞍点存在的必要条件和判定鞍点的充分条件。

The paper gives a definition on saddle point of the curved surface,and it makes the condition of existance and determination of the anglar saddle point of the smooth curved surface.