BALKAN JOURNAL OF GEOMETRY AND ITS APPLICATIONS, cilt.11, sa.2, ss.88-100, 2006 (SCI-Expanded)
In this paper, we introduce the lightlike ruled surfaces in semi-Euclidean space R-1(4) and classify the lightlike ruled surfaces in R-1(4). It is also investigated that their induced connection is a metric connection. Furthermore, we give the conditions of becoming striction line of base (directrix) curve.