On codimension two subvarieties of P6

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We prove the following: (a) Let X be a smooth, codimension two subvariety of P6. If X lies on a hyperquintic or if deg(X)<74, then X is a complete intersection. (b) Let X be a smooth, subcanonical threefold in P5. If X lies on a hyperquartic, then X is a complete intersection.
23 pages (Latex)

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Algebraic Geometry, 14J60;14J99

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http://salesiana.dossiersoluciones.com/handle/123456789/79140

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/9909137
 http://arxiv.org/abs/math/9909137

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arXiv