On the classification of defective threefolds

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We classify all irreducible projective threefolds $X$ which are $k$-defective, i.e. some $k$-secant variety of $X$ has dimension less than the expected value. This results extends the classical Scorza's classification of the case $k=1$.
AMSLaTeX, 30 pages

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Algebraic Geometry, 14J30

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http://salesiana.dossiersoluciones.com/handle/123456789/69750

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0312518
 http://arxiv.org/abs/math/0312518

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arXiv