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Sols, Ignacio and Giraldo Suárez, Luis
(1998)
*The irregularity of ruled surfaces in P 3.*
Collectanea mathematica, 49
(2-3).
pp. 325-334.
ISSN 0010-0757

PDF
Restringido a Repository staff only 89kB |

Official URL: http://www.collectanea.ub.edu/index.php/Collectanea/article/view/3945/4781

## Abstract

In this paper the authors determine which pairs of integers (d,q) appear as the degree and the irregularity of a ruled surface S in P 3 . The proof is based on the study of the base curve C of S in the Grassmannian G(1,3) ⊂P 5 : according to the dimension of the span of C some inequalities on d,q are given, and the existence of a curve C satisfying them follows from previous results of Rathmann and Pasarescu on curves in P 4 and in P 5 .

Item Type: | Article |
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Subjects: | Sciences > Mathematics > Algebra |

ID Code: | 20876 |

Deposited On: | 16 Apr 2013 16:21 |

Last Modified: | 13 Sep 2018 17:14 |

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