On branched coverings of quadrics (Q1924950)

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scientific article; zbMATH DE number 938577
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On branched coverings of quadrics
scientific article; zbMATH DE number 938577

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    On branched coverings of quadrics (English)
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    14 January 1997
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    Using the ``\(k\)-ampleness'' (in the sense of Sommese) of the vector bundle associated with a branched covering, \(f : X \to {\mathcal Q}_n\), of the smooth quadric \({\mathcal Q}_n\), we prove that \(f\) induces \(\mathbb{C}\)-cohomology isomorphisms between \(X\) and \({\mathcal Q}_n\) in a certain range of cohomology and homotopy dimensions, provided the degree of the covering is small enough.
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    Lefschetz type theorems
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    \(k\)-ampleness
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    branched covering
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    smooth quadric
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