STRINGS AND PIONS
Q-OPERATOR AND THE DRINFELD EQUATION
EXPLICIT FORMULAS FOR GENERALIZED ACTION–ANGLE VARIABLES IN A NEIGHBORHOOD OF AN ISOTROPIC TORUS AND THEIR APPLICATION
CONSTRUCTING SOLUTIONS FOR THE GENERALIZED HÉNON–HEILES SYSTEM THROUGH THE PAINLEVÉ TEST
COMMUTATION RELATIONS IN AN INDEFINITE-METRIC SPACE
COULOMB PROBLEM IN A ONE-DIMENSIONAL SPACE WITH CONSTANT POSITIVE CURVATURE
INTEGRABILITY IN STRING/FIELD THEORIES AND HAMILTONIAN FLOWS IN THE SPACE OF PHYSICAL SYSTEMS
INTEGRAL REPRESENTATIONS FOR CORRELATION FUNCTIONS OF THE X X Z HEISENBERG CHAIN
MODULARITY AND TOTAL ELLIPTICITY OF SOME MULTIPLE SERIES OF HYPERGEOMETRIC TYPE
ESSENTIAL AND DISCRETE SPECTRA OF THE THREE-PARTICLE SCHRÖDINGER OPERATOR ON A LATTICE
MULTIPOLE PSEUDOPOTENTIAL METHOD FOR SOME PROBLEMS IN QUANTUM SCATTERING THEORY
PERIODIC GIBBS MEASURES FOR THE ISING MODEL WITH COMPETING INTERACTIONS
A WEAKLY NONIDEAL BOSE GAS MODEL LEADING TO THE FOUNTAIN EFFECT