摘要
文章介绍了证明一个曲面方程表示柱面的两种有效途径:一种是根据方程的特点在空间中构造一族平行直线,使得它能够生成该曲面;另一种是在空间中构造一个柱面,使得该柱面就是所给的曲面.
In this paper,we introduced two effective ways of proving a surface equation to present the cylinder. One was structuring parallel straight lines which can form the curved surface. Another one was to create a cylinder which is just the giving curved surface.
出处
《怀化学院学报》
2017年第11期41-42,共2页
Journal of Huaihua University
基金
怀化学院一般项目"非线性奇异微分方程周期解的存在性及多重性研究"(HHUY2015-07)
关键词
柱面
准线
母线
cylinder
directrix
generatrix
