On irreducible four--manifolds

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We show that minimal symplectic 4--manifolds with $b_2^+ >1$ and with residually finite fundamental groups are irreducible. We also give examples of irreducible orientable four--manifolds with indefinite intersection forms which are not almost complex with respect to either orientation.
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Algebraic Geometry, 57R55,57R57,53C15

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http://salesiana.dossiersoluciones.com/handle/123456789/150013

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/alg-geom/9504012
 http://arxiv.org/abs/alg-geom/9504012

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arXiv