Effective non-vanishing conjectures for projective threefolds
نویسندگان
چکیده
منابع مشابه
Factorial Threefolds and Shokurov Vanishing
Abstract. We apply the Shokurov vanishing theorem to prove the factoriality of the following nodal threefolds: a complete intersection of hypersurfaces F and G ⊂ P of degree n and k respectively, where G is smooth, |Sing(F∩G)| 6 (n+k−2)(n−1)/5, n > k; a double cover of a smooth hypersurface F ⊂ P of degree n branched over a surface that is cut out on F by a hypersurface G of degree 2r > n, and ...
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ژورنال
عنوان ژورنال: advg
سال: 2010
ISSN: 1615-7168,1615-715X
DOI: 10.1515/advgeom.2010.035