Group Theory Seminar
On the Singer conjecture for some virtually special groups
Speaker: Grigiri Avramidi ()Date: Thursday, 20 March 2025 - 11:00Place: Aula Naranja, ICMAT
Abstract:
The Singer conjecture predicts concentration of L^2-Betti numbers for closed aspherical manifolds. I'll discuss recent progress on this conjecture for Tomei manifolds and some Gromov-Thurston branched covers, exploiting the fact that these manifolds have virtually special fundamental groups. One consequence is a counterexample to Lueck's homology torsion growth conjecture. Joint work with Boris O
