Projective normality of special scrolls

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We study the projective normality of a linearly normal special scroll R of degree d and speciality i over a smooth curve of genus g. If d>=4g-2i+1, we prove that the projective normality of the scroll is equivalent to the projective normality of its directrix curve of minimum degree.
Latex2.09; 9 pages

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Algebraic Geometry, Primary, 14J26; Secondary, 14H25, 14H45

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http://salesiana.dossiersoluciones.com/handle/123456789/63651

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0203257
 http://arxiv.org/abs/math/0203257

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arXiv