RT Journal Article
T1 The irregularity of ruled surfaces in P 3
A1 Sols Lucía, Ignacio
A1 Giraldo Suárez, Luis
AB 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  .
PB Springer
SN 0010-0757
YR 1998
FD 1998
LK https://hdl.handle.net/20.500.14352/58402
UL https://hdl.handle.net/20.500.14352/58402
LA eng
NO DGICYT
DS Docta Complutense
RD 10 abr 2025