Finite index quantum subgroups of discrete quantum groups
Abstract
We show that finite index quantum subgroups of a discrete quantum group are induced from finite index quantum subgroups of the unimodularization. As an application, we classify all finite index quantum subgroups of free products of the duals of connected simply-connected compact Lie groups. We also put proofs for some fundamental facts on finite index right coideals of compact quantum groups.
Fields of Study & Subjects
Advanced Operator Algebra Research
Advanced Topics in Algebra
Algebraic structures and combinatorial models
Publication details
- Journal / source
- Letters in Mathematical Physics
- Volume
- 116
- Issue
- 2
- Publication date
- 28 February 2026
- Language
- EN