2000 character limit reached
Finite index quantum subgroups of discrete quantum groups (2503.14044v1)
Published 18 Mar 2025 in math.OA and math.QA
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.