XXXIV Workshop on Geometric Methods in Physics | 28.06-4.07.2015 |

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## Yury Grigoryev## On bi-Hamiltonian formulation of the perturbed Kepler problemThe perturbed Kepler problem is shown to be a bi-Hamiltonian system in the domain of definition of the action-angle variables. The graph of the corresponding Hamilton function is not a hypersurface of translation and, therefore, it constitutes a counterexample to the original Fernandes theorem about the necessary and sufficient conditions for the existance of bi-Hamiltonian structures around a Liouville torus. |

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