Derivations of vector fields
Des espaces homogènes à la résolution de Koszul
Cette note évoque les premiers travaux de J.-L. Koszul (1947-1950) en les replaçant dans leur cadre historique et retrace en particulier le chemin qui a conduit Koszul à la résolution qui porte son nom.
Des immersions isométriques de surfaces aux variétés hyperboliques à bord convexe
Des métriques finslériennes sur le disque à partir d'une fonction distance entre les points.
Des métriques finslériennes sur le disque à partir d'une fonction distance entre les points du bord
Des questions de stabilité
Description lagrangienne d'un boson scalaire à l'aide d'un triplet nucléaire
Detecting codimension one manifold factors with the piecewise disjoint arc-disk property and related properties
We show that all finite-dimensional resolvable generalized manifolds with the piecewise disjoint arc-disk property are codimension one manifold factors. We then show how the piecewise disjoint arc-disk property and other general position properties that detect codimension one manifold factors are related. We also note that in every example presently known to the authors of a codimension one manifold factor of dimension n ≥ 4 determined by general position properties, the piecewise disjoint arc-disk...
Determination of compact subsets from functionals on them.
Determination of metrics by boundary energy.
Determination of the topological structure of an orbifold by its group of orbifold diffeomorphisms.
Deux généralisation du «théorèm des trois cercles» de Hadamard.
Deux remarques sur les flots riemanniens.
Developable hypersurfaces and homogeneous spaces in a real projective space.
Deviation of two curvatures
Deviations of stationary curves in the bundle .
Diameter bounds for convex surfaces with pinched mean curvature.
Diastolic and isoperimetric inequalities on surfaces
We prove a universal inequality between the diastole, defined using a minimax process on the one-cycle space, and the area of closed Riemannian surfaces. Roughly speaking, we show that any closed Riemannian surface can be swept out by a family of multi-loops whose lengths are bounded in terms of the area of the surface. This diastolic inequality, which relies on an upper bound on Cheeger’s constant, yields an effective process to find short closed geodesics on the two-sphere, for instance. We deduce...
Dichtepunkte im Spektrum Riemannscher Flächen.
Die Jacobifelder zu Minimalflächen im ...