Hellmut Baumgärtel
Papers
Duality of compact groups and Hilbert C*-systems for C*-algebras with a nontrivial center Hellmut Baumgärtel, Fernando Lledó open access link
Int.J.Math. 15 (2004) 759-812
Twisted duality of the CAR-Algebra Hellmut Baumgärtel, Matthias Jurke, Fernando Lledó open access link J.Math.Phys. 43 (2002) 4158-4179
An application of the DR-duality theory for compact groups to endomorphism categories of C*-algebras with nontrivial center Hellmut Baumgärtel, Fernando Lledó open access link
Fields Inst.Commun. 30 (2001) 1-10
Hilbert C*-systems for actions of the circle group Hellmut Baumgärtel, Alan L. Carey open access link doi:10.1016/S0034-4877(01)80048-3
Dual group actions on C*-algebras and their description by Hilbert extensions Hellmut Baumgärtel, F. Lledo open access link
Math.Nachr. 239 (2002) 11-27