关于可展曲面定义的一点注记  

A Note on the Definition of Developable Surface

作　　者：马淑云[1] 

机构地区：[1]南阳师范学院数学系,河南南阳473061

出　　处：《南阳师范学院学报》2004年第9期21-22,共2页Journal of Nanyang Normal University

摘　　要：探讨了满足条件 (a′(u) ,b(u) ,b′(u) ) =0的直纹面r(u ,v) =a(u) +vb(u)为可展曲面的合理性 。This article discussed the rationalization which ruled surface satisfied (a′(u),b(u),b′(u))=0 is developable surface r(u,v)=a(u)+vb(u) and verifies that only bunch of ruling of a ruled surface is essential condition but not full condition of developable surface.

关 键 词：直纹面 直母线 可展曲面 渐近方向 渐近曲线 

分 类 号：O186.11[理学—数学]