Perturbation theory in periodic problems for two-dimensional integrable systems. (English) Zbl 1307.35260
Reprint of [Zbl 0847.35122].
MSC:
| 35Q53 | KdV equations (Korteweg-de Vries equations) |
| 37J35 | Completely integrable finite-dimensional Hamiltonian systems, integration methods, integrability tests |
| 37K10 | Completely integrable infinite-dimensional Hamiltonian and Lagrangian systems, integration methods, integrability tests, integrable hierarchies (KdV, KP, Toda, etc.) |
| 35B20 | Perturbations in context of PDEs |
| 01A75 | Collected or selected works; reprintings or translations of classics |
