, Volume 322, Issue 2, pp 421-422
Date: 18 Jan 2002

Erratum to Integrality of L2-Betti numbers

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A gap has been found in the proof of Proposition 3 of [3]. Consequently, this result and the consequences drawn in the paper have to be considered as conjectures. In particular, it is not proved that the Atiyah conjecture is stable under extensions with free quotient groups and under free products with free groups..

The original online version for this chapter can be found at http://dx.doi.org/10.1007/PL00004421