Geodesic
To the theory of stability of Hamiltonian systems
Theoretical and applied mechanics, Tome 11 (1985) no. 1, p. 101 .

Voir la notice de l'article provenant de la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts

On the basis of the direct Lyapunov method, a method for calculating the energy value (called the critical value) for finite-dimensional Hamiltonian systems is indicated. Examples of the Hamiltonians of V. I. Arnold, G. Kontopoulos, and also the Yang-Mills modified by the Higgs mechanism are analyzed and compact invariant sets filled with regular4 trajectories are distinguished. 
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     title = {To the theory of stability of {Hamiltonian} systems},
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A. A. Martvnyuk. To the theory of stability of Hamiltonian systems. Theoretical and applied mechanics, Tome 11 (1985) no. 1, p. 101 . http://geodesic.mathdoc.fr/item/TAM_1985_11_1_a9/