Bordemann, Martin; Neumaier, Nikolai; Waldmann, Stefan Homogeneous Fedosov star products on cotangent bundles. II: GNS representations, the WKB expansion, traces, and applications. (English) Zbl 0989.53060 J. Geom. Phys. 29, No. 3, 199-234 (1999). MSC: 53D55 81S10 37J05 81Q20 PDF BibTeX XML Cite \textit{M. Bordemann} et al., J. Geom. Phys. 29, No. 3, 199--234 (1999; Zbl 0989.53060) Full Text: DOI arXiv OpenURL
Bordemann, Martin; Waldmann, Stefan Formal GNS construction and WKB expansion in deformation quantization. (English) Zbl 1166.53321 Sternheimer, Daniel (ed.) et al., Deformation theory and symplectic geometry. Proceedings of the Ascona meeting, Switzerland, June 17–21, 1996. Dordrecht: Kluwer Academic Publishers (ISBN 0-7923-4525-8/hbk). Math. Phys. Stud. 20, 315-319 (1997). MSC: 53D55 81Q20 81S10 PDF BibTeX XML Cite \textit{M. Bordemann} and \textit{S. Waldmann}, Math. Phys. Stud. 20, 315--319 (1997; Zbl 1166.53321) Full Text: arXiv OpenURL