二次曲面的切平面

Construction of a Plane Tangent to a Quadratic Surface

本文探讨了在没有给出椭球面、双叶双曲面,椭圆抛物面图形的条件下,过曲面外一给定直线作该曲面切平面和作与该曲面相切且与给定平面平行的切平面的问题。

Discusses the construction,under the condition that no ellipsoid, two-sheet hyperboloid or(?)elliptic paraboloid is given,of a plane tangent to a quadratic surface through a given line outside the surface,or of a plane tangent to the surface and parallel to a given plane.