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- W1984805903 abstract "Theorem: If W is a smooth complex projective variety with h^1 (O-script_W) = 0, then a sufficiently ample smooth divisor X on W cannot be a hyperplane section of a Calabi-Yau variety, unless W is itself a Calabi-Yau. Corollary: A smooth hypersurface of degree d in P^n (n >= 2) is a hyperplane section of a Calabi-Yau variety iff n+2 <= d <= 2n+2. The method is to construct out of the variety W a universal family of all varieties Z for which X is a hyperplane section with normal bundle K_X, and examine the bad singularities of such Z. A motivation is to show many curves cannot be divisors on a K-3 surface." @default.
- W1984805903 created "2016-06-24" @default.
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- W1984805903 date "2001-04-17" @default.
- W1984805903 modified "2023-09-27" @default.
- W1984805903 title "Hyperplane sections of Calabi-Yau varieties" @default.
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