=ADD= =reftype= 14 =number= 99-29 =url= ftp://ftp.risc.uni-linz.ac.at/pub/techreports/1999/99-29.ps.gz =year= 1999 =month= 10 =author= Schicho; Josef =title= The Multiple Conical Surfaces =abstract= A pencil of conics is a one-parameter family of conics. A conical surface is a surface which is generated as the union of conics in a pencil. A multiple conical surface is a surface which is a conical surface in more than one way. In this paper, we give a complete classification of the multiple conical surfaces. =keywords= conic, cyclide =note= submitted to Beitr. Alg. Geom. =sponsor= FWF