On the prescribed-period problem for autonomous Hamiltonian systems.
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On the question of stability in a Hamiltonian system
A. D. Bruno (1989)
Banach Center Publications
On the Symplectic Structure of Coadjoint Orbits of (Solvable) Lie Groups and Applications. I.
Niels Vigand Pedersen (1988)
Mathematische Annalen
On the topological charge conservation in the three-dimensional -model.
Jaroslav Dittrich (1984)
Aplikace matematiky
A field of three-component unit vectors on the dimensional spacetime is considered. Two field configurations with different values of the topological charge cannot be connected by the path of field configurations with a finite Euclidean action. Therefore there is no transition between them. The initial and final configurations are assumed to be continuous at infinity. The asymptotic behaviour of intermediate configurations may be arbitrary. The proof is based on the properties of the degree of...
On the transversal distribution and the complete figure in the second order multiple integral problem in the calculus of variations.
I.M. Snyman (1983)
Aequationes mathematicae
On the Variation in the Cohomology of the Symplectic Form of the Reduced Phase Space.
J.J. Duistermaat, G.J. Heckman (1982)
Inventiones mathematicae
Orbites périodiques des systèmes hamiltoniens autonomes
Nicole Desolneux-Moulis (1979/1980)
Séminaire Bourbaki
Orbites périodiques d'un système hamiltonien du voisinage d'un point d'équilibre
Jacques Vey (1978)
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
Oscillations de systèmes hamiltoniens non linéaires. III
Ivar Ekeland (1981)
Bulletin de la Société Mathématique de France
Oscillations forcées de systèmes hamiltoniens non linéaires
I. Ekeland (1979/1980)
Séminaire Équations aux dérivées partielles (Polytechnique)
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