La dynamique au voisinage d'un point fixe elliptique conservatif : de Poincaré et Birkhoff à Aubry et Mather
La théorie des catastrophes. V. Transformées de Legendre et thermodynamique
La trilogie du moment
A toute deux-forme fermée, sur une variété connexe, on associe une famille d’extensions centrales du groupe de ses automorphismes par son tore des périodes. On discute ensuite quelques propriétés de cette construction.
Lagrange schwarzian derivative and symplectic Sturm theory
Lagrangian embeddings and critical point theory
Lagrangian singularities of invariant tori of hamiltonian systems with two degrees of freedom.
Lagrangian theory for presymplectic systems
Lagrangian tori in a sympletic vector space and global symplectomorphisms.
Le «closing lemma» en topologie
Le formalisme de contact en mécanique classique et relativiste
Legendrian distributions with applications to relative Poincaré series.
Lemme de Moser feuilleté et clasifications des variétés de Poisson régulières.
Regular Poisson structures with fixed characteristic foliation F are described by means of foliated symplectic forms. Associated to each of these structures, there is a class in the second group of foliated cohomology H2(F). Using a foliated version of Moser's lemma, we study the isotopy classes of these structures in relation with their cohomology class. Explicit examples, with dim F = 2, are described.
Lepagean 2-forms in higher order Hamiltonian mechanics. I. Regularity
Lepagean 2-forms in higher order Hamiltonian mechanics. II. Inverse problem
Lie group theoretical construction of period mapping.
Linéarisation de certaines structures de Poisson de classe
Local Non-squeezing Theorems and Stability.
Locally conformal cosymplectic manifolds and time-dependent Hamiltonian systems
We show that locally conformal cosymplectic manifolds may be seen as generalized phase spaces of time-dependent Hamiltonian systems. Thus we extend the results of I. Vaisman for the time-dependent case.
Logarithmic convexity of push-forward measures.
Looking for the Bernoulli shift