No CrossRef data available.
Published online by Cambridge University Press: 20 November 2018
A surface of order three F in the real projective three-space P3 is met by every line, not in F, in at most three points.
In the present paper, we determine the existence and examine the distribution of elliptic, parabolic and hyperbolic points; that is, the differentiable points of F which do not lie on any line contained in F.