Number Operator Algebras and Deformations of ε-Poisson Algebras Fabien Besnard OriginalPaper Pages: 113 - 125
Bounds on One-Dimensional Exchange Energies with Application to Lowest Landau Band Quantum Mechanics Christian HainzlRobert Seiringer OriginalPaper Pages: 133 - 142
Hopf Solitons and Area-Preserving Diffeomorphisms of the Sphere L. A. FerreiraA. V. Razumov OriginalPaper Pages: 143 - 148
A Suggestion for an Integrability Notion for Two-Dimensional Spin Systems Harald GrosseKarl-Georg Schlesinger OriginalPaper Pages: 161 - 167
On the Classification of Admissible Representations of the Virasoro Algebra Jérôme Germoni OriginalPaper Pages: 169 - 177