$\ell^2$ and profinite invariants | Mathematical Institute

Seminar series

Junior Topology and Group Theory Seminar

Date

Wed, 26 Oct 2022
16:00

Location

Speaker

Ismael Morales

Organisation

University of Oxford

We review a few instances in which the first $\ell^2$ Betti number of a group is a profinite invariant and we discuss some applications and open problems.