Novikov-Betti numbers and the fundamental group

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We prove that nonvanishing of the first Novikov-Betti number implies that the fundamental group contains a nonabelian free subgroup.

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Algebraic Topology

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http://salesiana.dossiersoluciones.com/handle/123456789/116328

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0609004
 http://arxiv.org/abs/math/0609004

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arXiv