Projective generation and smoothness of congruences of order 1
Algebraic Geometry
2007-05-23 v1
Abstract
In this paper we give the projective generation of congruences of order 1 of r-dimensional projective spaces in P^N from their focal loci. In a natural way, this construction shows that the corresponding surfaces in the grassmannian are the Veronese surface, and rational ruled surfaces eventually with singularities. We characterize when these surfaces are smooth, recovering and generalizing a Ziv Ran's result.
Keywords
Cite
@article{arxiv.math/0003048,
title = {Projective generation and smoothness of congruences of order 1},
author = {Manuel Pedreira-Perez and Luis-Eduardo Sola-Conde},
journal= {arXiv preprint arXiv:math/0003048},
year = {2007}
}
Comments
Latex2e, 18 pages