(1) Institut für Mathematik, Technische Universität München, Arcisstraße 21, D-8000 München 2, Bundesrepublik Deutschland
Abstract:
Let ={e(u)|uI} be a one-parameter family of straight lines forming a ruledCr-2-surface En (n2,r1) without singular generatorse(u) (uI). As a synopsis, a generalization and an improvement of various results already known about the strictional properties of ruled surfaces En (especially in the casen=3) the author demonstrates a uniform geometrical way of defining and uniquely obtaining thestriction point S(u) and theparameter of distribution d(u) of a generatore(u) under the minimal assumptions thate(u)En (n2) be noncylindrical andr1. Other methods of obtainingS(u) andd(u) are discussed in comparison, and special strictional properties ofskew ruled surfaces En are proved.Herrn Prof. Dr. H. R. Müller zum 65. Geburtstag