曲面交线的一种特例

A Special Example For Joint Line

空间两曲面的交线在一般情况下是空间曲线.利用解析的方法,证明了在特定情况下,球和椭圆锥的交线为平面曲线(圆).

<ABSTRACT> The joint line of two cambers is not curved-line in general. In this paper, analytic method is employed to prove that under special conditions,the joint line of a sphere and elliptic cone is a plane curved one.