Novikov-Betti numbers and the fundamental group
Algebraic Topology
2007-05-23 v1
Abstract
We prove that nonvanishing of the first Novikov-Betti number implies that the fundamental group contains a nonabelian free subgroup.
Cite
@article{arxiv.math/0609004,
title = {Novikov-Betti numbers and the fundamental group},
author = {Michael Farber and Dirk Schuetz},
journal= {arXiv preprint arXiv:math/0609004},
year = {2007}
}