Letters in Mathematical Physics 49: 351—352, 1999 Contents of Volume 49 Volume 49 No.1 July (1) 1999 PAOLO ASCHIERI / Real Forms of Quantum Orthogonal Groups, qg-Lorentz Groups in any Dimension F. BONECHI, N. CICCOLI, R. GIACHETTI, E. SORACE and M. TARLINI / Unitarity of Induced Representations from Coisotropic Quantum Subgroups MING-HSIEN TU, JIEN-CHANG SHAW and CHIN-RONG LEE / On Darboux-—Backlund Transformations for the Q-Deformed Korteweg-de Vries Hierarchy V. K. DOBREVand M. EL FALAKI / Quantum Group U,(A,) Singular Vectors in Poincare— Birkhoff—Witt Basis J. BASTO-GONCALVES and I. CRUZ / Analytic k-Linearizability of Some Resonant Poisson Structures P. A. HORVATHY / The Topology of Nontopological Chern—Simons Vortices IOSIF POLTEROVICH / From Agmon-—Kannai_ Expansion _ to Korteweg-de Vries Hierarchy ALEXANDER I. BOBENKO and YURI B. SURIS / Discrete Lagrangian Reduction, Discrete Euler— Poincare Equations, and Semidirect Products Volume 49 No. 2 July (11) 1999 MING-HSIEN TU / Q-Deformed KP Hierarchy: Its Additional Symmetries and Infinitesimal Backlund Transformations R. J. FINKELSTEIN / Observable Properties of g-Deformed Physical Systems ALBERT SCHWARZ / Quantum Observables, Lie Algebra Homology and TQFT G. A. VILKOVISKY / Master Equation in the General Gauge: On the Problem of Infinite Reducibility EMIL HOROZOV and ALEX KASMAN / Darboux Transformations of Bispectral Quantum Integrable Systems D. A. KOROTKIN and V. B. MATVEEV / Schlesinger System, Einstein Equations and Hyperelliptic Curves JINTAL DING /A Remark on the FRTS Realization and Drinfeld Realization of Quantum Affine Superalgebra U,(osp(1, 2)) LETTERS IN MATHEMATICAL PHYSICS Volume 49 No.3 August 1999 P. B. A. LECOMTE and V. YU. OVSIENKO / Projectively Equivariant Symbol Calculus H. D. CORNEAN / On the Essential Spectrum of Two-Dimensional Peri- odic Magnetic Schrodinger Operators D. B. FAIRLIE and A. N. LEZNOV / The Complex Bateman Equation MICHAEL BAAKE / A Note on Palindromicity PAUL FENDLEY / Airy Functions in the Thermodynamic Bethe Ansatz A. IFTIMOVICI and M. MANTOIU / Limiting Absorption Principle at Critical Values for the Dirac Operator MICHEL DUBOIS-VIOLETTE and MARC HENNEAUX / General- ized Cohomology for Irreducible Tensor Fields of Mixed Young Symmetry Type D. SHKLYAROV, S. SINELSHCHIKOV and L. VAKSMAN q-Analogue of the Berezin Quantization Method Volume 49 No.4 September 1999 XUFENG LIU / Some Tensor Product Representations of U,(sl>) at Roots of Unity SHIGERU FURUICHI and MASANORI OHYA / Entanglement Degree in the Time Development of the Jaynes—-Cummings Model AGAPITOS HATZINIKITAS / The Gravitational Chiral Anomaly of the Spin-1/2 Field in the Presence of Twisted Boundary Conditions for Ordinary Field Theory DONGHO CHAE and HEE-SEOK NAM / Multiple Existence of the Multivortex Solutions of the Self-Dual Chern—Simons CP(1) Model on a Doubly Periodic Domain ITALO GUARNERI and HERMANN SCHULZ-BALDES Intermittent Lower Bound on Quantum Diffusion ZOLTAN BAJNOK Defining Relations for W-Algebras from Singular Vectors DETLEV BUCHHOLZ, MARTIN FLORIG and STEPHEN J. SUMMERS / An Algebraic Characterization of Vacuum States in Minkowski Space. II. Continuity Aspects Ghe ena