Impacto
Downloads
Downloads per month over past year
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 |
---|---|
Subjects: | Sciences > Mathematics > Algebra |
ID Code: | 20876 |
Deposited On: | 16 Apr 2013 16:21 |
Last Modified: | 13 Sep 2018 17:14 |
Origin of downloads
Repository Staff Only: item control page