The Neron-Severi group of a proper seminormal complex variety
classification
🧮 math.AG
keywords
complexlefschetzproperseminormalappliedargumentassociatedclass
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We prove a Lefschetz (1,1)-Theorem for proper seminormal varieties over the complex numbers. The proof is a non-trivial geometric argument applied to the isogeny class of the Lefschetz 1-motive associated to the mixed Hodge structure on H^2.
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