$\ell^2$-invariants and generalisations in positive characteristic

Seminar series

Junior Topology and Group Theory Seminar

Date

Wed, 19 Oct 2022
16:00

Location

Speaker

Sam Fisher

Organisation

University of Oxford

We survey the theory of $\ell^2$-invariants, their applications in group theory and topology, and introduce a positive characteristic version of $\ell^2$-theory. We also discuss the Atiyah and Lück approximation conjectures, two of the central problems in this area.