Threefolds of P^5 with one apparent quadruple point
Algebraic Geometry
2017-02-03 v1
Abstract
In this article we classify all the smooth threefolds of P^5 with an apparent quadruple point provided that the family of its 4-secant lines is an irreducible (first order) congruence. This is sufficient to conclude the classification of all the smooth codimension two varieties of P^n with one apparent (n-1)-point and with irreducible family of (n-1)-secant lines.
Keywords
Cite
@article{arxiv.math/0207104,
title = {Threefolds of P^5 with one apparent quadruple point},
author = {Pietro De Poi},
journal= {arXiv preprint arXiv:math/0207104},
year = {2017}
}
Comments
AMS-LaTeX2e, 14 pages