Seminario Teoría de Grupos
On the Singer conjecture for some virtually special groups
Ponente: Grigiri Avramidi ()Fecha: jueves 20 de marzo de 2025 - 11:00Lugar: Aula Naranja, ICMAT
Resumen:
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
