Weak perturbation of integrable Hamiltonian preserves most invariant tori — sufficiently irrational. Kolmogorov 1954, Arnold 1963, Moser 1962. Explains solar-system long-term stability.
Weak perturbation of integrable Hamiltonian preserves most invariant tori — sufficiently irrational. Kolmogorov 1954, Arnold 1963, Moser 1962. Explains solar-system long-term stability.