利用脐点的性质研究欧氏空间中二次曲面的圆截口问题

Research of Circle Section Quadric Surface in the Eududean Spure by the properties of the Umbilic Points

本文利用脐点的性质研究了二次曲面的圆截口问题 。

In this paper,we make use of the properties of the umbilic to research circle Section question of quadric in 3 dimensional eucliclean space. We give the equations of these circle sections.