Periodic problem for KP-type equations, perturbation theory for flnite-zone solutions of KP-2 73
Periodic problem for KP-type equations, quasiclassical limit of two-dimensional integrable equations, Khokhlov — Zabolotskaya equation 82
Periodic problem for KP-type equations, Whitham equations for spatially two-dimensional integrable systems 78
Perturbation theory of finite-zone solutions of evolution Lax-type equations 8
Perturbation theory of finite-zone solutions of evolution Lax-type equations, KdV equation 13
Perturbation theory of finite-zone solutions of evolution Lax-type equations, Sine — Gordon equation 27
Spectral theory of non-stationary Schroedinger operators, finite-zone case 38
| Spectral theory of non-stationary Schroedinger operators, perturbation theory for formal Bloch solutions 46
Spectral theory of non-stationary Schroedinger operators, structure of Riemann surface for Bloch functions 53
Spectral theory of non-stationary Schroedinger operators, theorem on approximation 63
Spectral theory of non-stationary Schroedinger operators, theorem on completeness for products of Bloch functions 66
Spectral theory of two-dimensional periodic Schroedinger operators, perturbation theory for formal Bloch solutions 83
Spectral theory of two-dimensional periodic Schroedinger operators, structure of complex ‘Fermi curves’ 90
Spectral theory of two-dimensional periodic Schroedinger operators, ‘finite zone with respect to level  ’ two-dimensional periodic Schroedinger operators 93
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