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• #### Classification of idempotent states on the compact quantum groups Uq(2), SUq(2) and SOq(3) ﻿

[OWP-2009-08] (Mathematisches Forschungsinstitut Oberwolfach, 2009-03-02)
We give a simple characterisation of those idempotent states on compact quantum groups which arise as Haar states on quantum subgroups, show that all idempotent states on quantum groups $U_q(2)$, $SU_q(2)$, and \$SO_q(3) ...