Explicit Noether-Lefschetz for arbitrary threefolds

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We study the Noether-Lefschetz locus of a very ample line bundle L on an arbitrary smooth threefold Y. Building on results of Green, Voisin and Otwinowska, we give explicit bounds, depending only on the Castelnuovo-Mumford regularity properties of L, on the codimension of the components of the Noether-Lefschetz locus of |L|.
30 pages, Latex

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Algebraic Geometry, 14J10; 14J30

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http://salesiana.dossiersoluciones.com/handle/123456789/75823

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0507362
 http://arxiv.org/abs/math/0507362

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arXiv