CONTRIBUTIONS TO THE PROJECTIVE THEORY OF CURVES IN SPACE OF N DIMENSIONS(First Memoir)

<正> In the present paper we propose to establish certain theoremsconcerning plane sections of the circumscribed developable of a curvein the projective n-dimensional space s_n(（?）3).The planes in considera-tion are supposed to be in the osculating spaces s3 of the curve.Forthe planes of other kinds the corresponding sections must have a singularpoint of higher order and consequently require more complicated repre-sentation,as we have shown in other places.The allied problemwill be considered in a subsequent paper.