Quantum automorphism groups of finite quantum groups are classical
  In a recent paper of Bhowmick, Skalski and So{\l}tan the notion of a quantum group of automorphisms of a finite quantum group was introduced and, for a given finite quantum group G, existence of the universal quantum group acting on G by automorphisms was proved. We show that this universal quantum group is in fact a classical group. The key ingredient of the proof is the use of multiplicative unitary operators, and we include a thorough discussion of this notion in the context of finite quantum groups. 
Pawe{\l} Kasprzak, Piotr M. So{\l}tan, Stanis{\l}aw L. Woronowicz
math.OA math.QA