37J40 Perturbations, normal forms, small divisors, KAM theory, Arnol&apos;d diffusion

37J45 Periodic, homoclinic and heteroclinic orbits; variational methods, degree-theoretic methods

37J50 Action-minimizing orbits and measures

37J55 Contact systems [See also <a href="#code:53D10">53D10</a>]

37J60 Nonholonomic dynamical systems [See also <a href="#code:70F25">70F25</a>]

37J99 None of the above, but in this section

37Kxx Infinite-dimensional Hamiltonian systems [See also <a href="#code:35Axx">35Axx</a>, <a href="#code:35Qxx">35Qxx</a>]

37K05 Hamiltonian structures, symmetries, variational principles, conservation laws

37K10 Completely integrable systems, integrability tests, bi-Hamiltonian structures, hierarchies (KdV, KP, Toda, etc.)

37K15 Integration of completely integrable systems by inverse spectral and scattering methods

37K20 Relations with algebraic geometry, complex analysis, special functions [See also <a href="#code:14H70">14H70</a>]

37K25 Relations with differential geometry

37K30 Relations with infinite-dimensional Lie algebras and other algebraic structures

37K35 Lie-Bäcklund and other transformations

37K40 Soliton theory, asymptotic behavior of solutions

37K55 Perturbations, KAM for infinite-dimensional systems

37K60 Lattice dynamics [See also <a href="#code:37L60">37L60</a>]

37K65 Hamiltonian systems on groups of diffeomorphisms and on manifolds of mappings and metrics

37K99 None of the above, but in this section

37Lxx Infinite-dimensional dissipative dynamical systems [See also <a href="#code:35Bxx">35Bxx</a>, <a href="#code:35Qxx">35Qxx</a>]

37L05 General theory, nonlinear semigroups, evolution equations

37L10 Normal forms, center manifold theory, bifurcation theory

37L25 Inertial manifolds and other invariant attracting sets

37L30 Attractors and their dimensions, Lyapunov exponents

37L50 Noncompact semigroups; dispersive equations; perturbations of Hamiltonian systems

37L55 Infinite-dimensional random dynamical systems; stochastic equations [See also <a href="#code:35R60">35R60</a>, <a href="#code:60H10">60H10</a>, <a href="#code:60H15">60H15</a>]