Title: On a rational analogue of a conjecture of Singer
Speaker: Grigori Avramidi (University of Utah)
Abstract: For a closed manifold M with contractible universal cover, the Singer conjecture predicts that the L^2-Betti numbers of M are concentrated in the middle dimension. In this talk, I will show that there is a closed manifold with rationally acyclic universal cover whose L^2-Betti numbers are not concentrated in the middle dimension.
Seminar URL: https://research.math.osu.edu/ggt/
