Columbia subject headings:
Celestial mechanics.
Hamilton-Jacobi equations.
Hamiltonian systems.
Perturbation (Astronomy)
Series, Lie.
Harvard subject headings:
Astronomy
Astrophysics
Celestial mechanics.
Hamilton-Jacobi equations.
Hamiltonian systems.
Mathematical physics
Mathematics
Perturbation (Astronomy)
Physics
Series, Lie.
Princeton subject headings:
Hamiltonian systems.
Perturbation (Astronomy)
Series, Lie.