A view on contractions of higher dimensional varieties

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In this paper we discuss some recent results about extremal contractions of complex algebraic varieties. These are proper surjective maps, $ϕ: X\longrightarrow Z$, of normal varieties with connected fibers such that $X$ has mild singularities (in particular $X$ is $Q$-Gorenstein) and the anticanonical divisor of $X$ is $ϕ$ ample. It will appear on the Proceedings of AMS-SRI on Algebraic Geometry, Santa Cruz 1995.
AMS-TeX (pspum), 31 pages

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Algebraic Geometry, 14E30, 14J40 (Primary), 32H02 (Secondary)

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http://salesiana.dossiersoluciones.com/handle/123456789/150237

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/alg-geom/9611017
 http://arxiv.org/abs/alg-geom/9611017

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arXiv