The Neron-Severi group of a proper seminormal complex variety

Details The Neron-Severi group of a proper seminormal complex variety The Neron-Severi group of a proper seminormal complex variety

2005-11-22

arxiv.org/abs/math/0511558v2

Math. Zeitschrift Vol. 261 N. 2 (2009) 261-276

Mathematics

Algebraic Geometry

16 pages; Mathematische Zeitschrift (2008)

Scientific paper

10.1007/s00209-008-0324-7

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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