Twisted (equivariant) K-theory: what, why, howOberseminar Global Analysis and Operator Algebras

by Thomas Schick (Uni Göttingen)

Friday Jul 3, 2026, 2:00 PM → 3:00 PM Europe/Berlin

Lipschitzsaal (Mathezentrum)

Twisted K-theory and its equivariant version have seen numerous applications in
recent years, e.g. to model certain types of charges and fields in Quantum Field
Theories and to implement T-duality isomorphisms.
The talk will give a survey on models for the construction of such groups, test cases
for their use, and for computation tools. In the latter case, we will focus on geometric
constructions of twisted and equivariant Chern character maps.
The presentation will report among other things on recent work with Ulrich Pennig
and Valentin Marr as well as Tom Dove and Mario Velasquez.