Remarks on the existence of Cartier divisors

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Given an invertible sheaf, does it come from a Cartier divisor? This might fail in presence of embedded components. I give some examples and characterize those invertible sheaves that allow a Cartier divisor.
5 pages, to appear in Arch. Math

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Algebraic Geometry, 14C20

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http://salesiana.dossiersoluciones.com/handle/123456789/58546

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0001104
 http://arxiv.org/abs/math/0001104
 Arch. Math. 75, 35-38 (2000)

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arXiv