Finite dimensional Hopf actions on deformation quantizations
arXiv:1602.00532
Abstract
We study when a finite dimensional Hopf action on a quantum formal deformation A of a commutative domain A_0 (i.e., a deformation quantization) must factor through a group algebra. In particular, we show that this occurs when the Poisson center of the fraction field of A_0 is trivial.
v3. 9 pages. To appear in Proc. Amer. Math. Soc