Sur un résultat de Waldspurger II
Sur un théorème d'intégralité de B. Kostant
Sur une conjecture de Howe. I
Sur une version algébrique de la notion de sous-groupe minimal relatif de
Surface Projective Convexe de volume fini
Une surface projective convexe est le quotient d’un ouvert proprement convexe de l’espace projectif réel par un sous-groupe discret de . Nous donnons plusieurs caractérisations du fait qu’une surface projective convexe est de volume fini pour la mesure de Busemann. On en déduit que si n’est pas un triangle alors est strictement convexe, à bord et qu’une surface projective convexe est de volume fini si et seulement si la surface duale est de volume fini.
Surfaces in three-dimensional Lie groups.
Surfaces of revolution in the Heisenberg group and the spectral generalization of the Willmore functional.
Symbol calculus on the affine group "ax + b"
The symbol calculus on the upper half plane is studied from the viewpoint of the Kirillov theory of orbits. The main result is the -estimates for Fuchs type pseudodifferential operators.
Symmetric space Cartan connections and gravity in three and four dimensions.
Symmetrische Brücken und Knotentheorie zu den Dynkin-Diagrammen vom Typ B.
Symmetry and nonsymmetry for a class of exponential Lie groups.
Symmetry extensions and their physical reasons in the kinetic and hydrodynamic plasma models.
Symmetry of the barochronous motions of a gas.
Symplectic convexity theorems and coadjoint orbits
Symplectic K2 of Laurent polynomials, associated Kac-Moody groups and Witt rings.
Symplectic structures and cohomologies on some solvmanifolds.
Symplectic strucutre on generalized orbits of solvable Lie groups.
Symplectic torus actions with coisotropic principal orbits
In this paper we completely classify symplectic actions of a torus on a compact connected symplectic manifold when some, hence every, principal orbit is a coisotropic submanifold of . That is, we construct an explicit model, defined in terms of certain invariants, of the manifold, the torus action and the symplectic form. The invariants are invariants of the topology of the manifold, of the torus action, or of the symplectic form.In order to deal with symplectic actions which are not Hamiltonian,...
Synthèse spectrale dans les algèbres de Sobolev non isotropes
Système sous-elliptiques II.