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Article
Exponential Stability in the Perturbed Central Force Problem
We consider the spatial central force problem with a real analytic potential. We prove that for all analytic potentials, but for the Keplerian and the harmonic ones, the Hamiltonian fulfills a nondegeneracy pr...
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Secular dynamics of a planar model of the Sun-Jupiter-Saturn-Uranus system; effective stability in the light of Kolmogorov and Nekhoroshev theories
We investigate the long-time stability of the Sun-Jupiter-Saturn-Uranus system by considering a planar secular model, which can be regarded as a major refinement of the approach first introduced by Lagrange. I...
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Improved convergence estimates for the Schröder–Siegel problem
We reconsider the Schröder–Siegel problem of conjugating an analytic map in \(\mathbb {C}\) ...