-orbit functions.
Éclatements quasi homogènes
Effondrement, spectre et propriétés diophantiennes des flots riemanniens
On étudie le comportement des premières valeurs propres du laplacien agissant sur les formes différentielles lors d’un effondrement adiabatique d’un flot riemannien sur une variété compacte . Le nombre de petites valeurs propres peut alors se calculer en fonction de la cohomologie basique de , et on donne des critères spectraux pour l’annulation des classes d’Álvarez et d’Euler du flot. En outre, on définit un invariant de nature diophantienne du flot qui est lié au comportement asymptotique...
Effondrements et petites valeurs propres des formes différentielles
À courbure et diamètre bornés, les valeurs propres non nulles du laplacien de Hodge-de Rham agissant sur les formes différentielles d’une variété compacte ne sont pas uniformément minorées comme c’est le cas pour les fonctions, et si l’une d’elle tend vers zéro alors le volume de la variété tend aussi vers zéro, c’est-à-dire qu’elle s’effondre. On présente ici les résultats obtenus ces dernières années concernant le problème réciproque, à savoir déterminer le comportement asymptotique des premières...
Eigenvalues of the laplacian of compact Riemann surfaces and minimal submanifolds
Eine Bemerkung zur Regularität stationärer Punkte von konform invarianten Variationsintegralen.
Eine Bemerkung zur Stabilität von Entfaltungen.
Einige Bemerkungen zur Entfaltung symmetrischer Funktionen.
Embedding of Hilbert manifolds with smooth boundary into semispaces of Hilbert spaces
In this paper we prove the existence of a closed neat embedding of a Hausdorff paracompact Hilbert manifold with smooth boundary into , where is a Hilbert space, such that the normal space in each point of a certain neighbourhood of the boundary is contained in . Then, we give a neccesary and sufficient condition that a Hausdorff paracompact topological space could admit a differentiable structure of class with smooth boundary.
Energy machineries on a manifold; application to the construction of new energy representations of Gauge groups.
The introduction of the concepts of energy machinery and energy structure on a manifold makes it possible a large class of energy representations of gauge groups including, as a very particular case, the ones known up to now. By using an adaptation of methods initiated by I. M. Gelfand, we provide a sufficient condition for the irreducibility of these representations.
Energy of measures on compact Riemannian manifolds
We investigate the energy of measures (both positive and signed) on compact Riemannian manifolds. A formula is given relating the energy integral of a positive measure with the projections of the measure onto the eigenspaces of the Laplacian. This formula is analogous to the classical formula comparing the energy of a measure in Euclidean space with a weighted L² norm of its Fourier transform. We show that the boundedness of a modified energy integral for signed measures gives bounds on the Hausdorff...
Epi-differentiability and optimality conditions for an extremal problem under inclusion constraints.
Équations différentielles caractéristiques de la sphère
Equidistribution of cusp forms on
We prove a microlocal version of the equidistribution theorem for Wigner distributions associated to cusp forms on . This generalizes a recent result of W. Luo and P. Sarnak who prove equidistribution on .
Equivalence and zero sets of certain maps in infinite dimensions
Equivalence and zero sets of certain maps on infinite dimensional spaces are studied using an approach similar to the deformation lemma from the singularity theory.
Equivalence of differentiable functions, rational functions and polynomials
We show under some assumptions that a differentiable function can be transformed globally to a polynomial or a rational function by some diffeomorphism. One of the assumptions is that the function is proper, the number of critical points is finite, and the Milnor number of the germ at each critical point is finite.
Equivalence of differentiable mappings and analytic mappings
Equivalence of generic mappings and normalization
Equivalence of Glancing Hypersurfaces. II.
Erratum: Spectra of Compact Locally Symmetric Manidfolds of Negative Curvature.