A note on rational surfaces in projective four-space

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It is proved that a smooth rational surface in projective four-space, which is ruled by cubics or quartics has degree at most 12. It is also proved that a smooth rational surface in projective four-space which is the image of Fn by a linear system with "simple base points" (see text) has degree at most 12.
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Algebraic Geometry, 14J26

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http://salesiana.dossiersoluciones.com/handle/123456789/78550

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/9905148
 http://arxiv.org/abs/math/9905148

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arXiv