二次曲面上二次曲线的透视对应及透视中心的确定

The Perspective Corresponding of Conics on Quadrics and Method of Fixing the Center of Perspectivity

根据射影几何学中的配极对应原理，提出并证明了任意一个二次曲面上的两条二次曲线为透视对应。给出了透视中心的确定方法，并介绍了其应用。

Based on the principle of polar transformation in projective geometry, the authorproposes and proves that two conics on any quadrics are perspective corresponding to each other.This paper also offers the method of fixing the center of perspectivity and introduces itsapplication.