Seminar series
Date
Tue, 25 Oct 2022
14:00
14:00
Location
L6
Speaker
Piotr Nowak
Organisation
Institute of Mathematics - Polish Academy of Sciences
I will discuss algebraic conditions that for a given group guarantee or characterize the vanishing of cohomology in a given degree with coefficients in any unitary representation. These conditions will be expressed in terms positivity of certain elements over group algebras, where positivity is meant as being a sum of hermitian squares. I will explain how conditions like this can be used to give computer-assisted proofs of vanishing of cohomology.