A-cohomologie et opérateurs de récursion
Action minimizing invariant measures for positive definite Lagrangian systems.
Action-angle coordinates at singularities for analytic integrable systems.
Actions de groupes de Kazhdan sur le cercle
Actions localement libres de groupes non unimodulaires
Actions localement libres de groupes résolubles
Soient un groupe de Lie connexe de dimension , une action localement libre de classe de sur une variété compacte de dimension . Nous supposons qu’il existe dans l’algèbre de Lie de un champ tel que les valeurs propres de soient avec . Alors, nous montrons que est -conjuguée à une “action modèle" de sur un espace homogène où est un groupe de Lie contenant . Si , est uniquement déterminé par ; si , il y a deux groupes possibles, et nous pouvons donc donner une...
Actions localement libres du groupe affine.
Actions of the group of homeomorphisms of the circle on surfaces
We describe all the group morphisms from the group of orientation-preserving homeomorphisms of the circle to the group of homeomorphisms of the annulus or of the torus.
Active stabilization of a chaotic urban system.
Addendum: Systems of Toda Type, Inverse Spectral Problems, and Representation Theory.
Addendum to: A Bound for the Fixed-Point Index of an Area-Preserving Map with Applications to Mechanics.
Addendum to "On the Variation in the Cohomology of the Symplectic Form of the Reduced Phase Space."
Adding machines, endpoints, and inverse limit spaces
Let f be a unimodal map in the logistic or symmetric tent family whose restriction to the omega limit set of the turning point is topologically conjugate to an adding machine. A combinatoric characterization is provided for endpoints of the inverse limit space (I,f), where I denotes the core of the map.
Adelic equidistribution, characterization of equidistribution, and a general equidistribution theorem in non-archimedean dynamics
We determine when the equidistribution property for possibly moving targets holds for a rational function of degree more than one on the projective line over an algebraically closed field of any characteristic and complete with respect to a non-trivial absolute value. This characterization could be useful in the positive characteristic case. Based on a variational argument, we give a purely local proof of the adelic equidistribution theorem for possibly moving targets, which is due to Favre and...
Adjoint methods for obstacle problems and weakly coupled systems of PDE
The adjoint method, recently introduced by Evans, is used to study obstacle problems, weakly coupled systems, cell problems for weakly coupled systems of Hamilton − Jacobi equations, and weakly coupled systems of obstacle type. In particular, new results about the speed of convergence of some approximation procedures are derived.
Affine Anosov diffeomorphims of affine manifolds.
Affine diffeomorphisms of translation surfaces : periodic points, fuchsian groups, and arithmeticity
Affine Gelfand-Dickey Brackets and Holomorphic Vector Bundles.
Affine Parts of Abelian Surfaces as Complete Intersections of Four Quadrics.
Affine spheres: Discretization via duality relations.