Graphs of groups and the Atiyah conjecture for one-relator groups

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Paper withdrawn because of a gap in the proof of Proposition 3 of Thomas Schick: "Integrality of L2-Betti numbers", Math. Ann. 317, 727-750 (arXiv.org/abs/math.gt/0001101). Most results of the withdrawn paper were based on this proposition.
Paper withdrawn by the authors because of a gap in the proof of a result of Thomas Schick: "Integrality of L2-Betti numbers", which was crucially used in the withdrawn paper

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Geometric Topology, Group Theory, K-Theory and Homology, Operator Algebras

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http://salesiana.dossiersoluciones.com/handle/123456789/59070

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0004156
 http://arxiv.org/abs/math/0004156

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arXiv