Curvature of a semi-direct extension of a Heisenberg type nilpotent group
Curved Casimir operators and the BGG machinery.
Curves and Formal (Co) Groups.
Cuspidal functions and Diophantine approximation.
Cuspidal local systems and graded Hecke algebras, I
Cut locus and optimal synthesis in the sub-Riemannian problem on the group of motions of a plane*
The left-invariant sub-Riemannian problem on the group of motions (rototranslations) of a plane SE(2) is considered. In the previous works [Moiseev and Sachkov, ESAIM: COCV, DOI: 10.1051/cocv/2009004; Sachkov, ESAIM: COCV, DOI: 10.1051/cocv/2009031], extremal trajectories were defined, their local and global optimality were studied. In this paper the global structure of the exponential mapping is described. On this basis an explicit characterization of the cut locus and Maxwell set is obtained....
Cut locus and optimal synthesis in the sub-Riemannian problem on the group of motions of a plane*
The left-invariant sub-Riemannian problem on the group of motions (rototranslations) of a plane SE(2) is considered. In the previous works [Moiseev and Sachkov, ESAIM: COCV, DOI: 10.1051/cocv/2009004; Sachkov, ESAIM: COCV, DOI: 10.1051/cocv/2009031], extremal trajectories were defined, their local and global optimality were studied. In this paper the global structure of the exponential mapping is described. On this basis an explicit characterization of the cut locus and Maxwell set is obtained....
Cycles de Schubert et cohomologie equivariante de K/T.
Cyclic cohomology of certain nuclear Fréchet algebras and DF algebras
We give explicit formulae for the continuous Hochschild and cyclic homology and cohomology of certain -algebras. We use well-developed homological techniques together with some niceties of the theory of locally convex spaces to generalize the results known in the case of Banach algebras and their inverse limits to wider classes of topological algebras. To this end we show that, for a continuous morphism ϕ: x → y of complexes of complete nuclear DF-spaces, the isomorphism of cohomology groups H...
-chtoucas de Drinfeld à modifications symétriques et identité de changement de base
-modules and representation theory of Lie groups
Darstellungen von SL(2, Z/p ... Z) und Thetafunktionen. I.
Darstellungen von SL(2,.../p...) und Thetafunktionen. II.
Das Horrocks-Mumford-Bündel und das Modul-Schema für stabile 2-Vektorbündel über IP4 mit c1= -1, c2 = 4.
Das Syntheseproblem für invariante Distributionen.
Davenport-Hasse relations and an explicit Langlands correspondence, II : twisting conjectures
Let be a finite field extension. The Langlands correspondence gives a canonical bijection between the set of equivalence classes of irreducible -dimensional representations of the Weil group of and the set of equivalence classes of irreducible supercuspidal representations of GL. This paper is concerned with the case where . In earlier work, the authors constructed an explicit bijection using a non-Galois tame base change map. If this tame base change satisfies a certain conjectured...
De quelques aspects de la théorie des -variétés différentielles et analytiques
Une -variété est le quotient d’une variété par une relation d’équivalence “étale” (feuilletage sans holonomie transversale). Cette catégorie est stable par quotients “étales”, et contient tout quotient d’une -variété en groupe par un sous-groupe. Elle forme le meilleur cadre possible pour l’étude des groupes de Lie. Une construction explicite de la cohomologie permettra d’obtenir la suite spectrale de Leray d’un morphisme de -variétés, celle des espaces à opérateurs, d’où leur interprétation...
De Sitter to Poincaré contraction and relativistic coherent states
Decomposing oscillator representations of by a super dual pair
Décomposition sur le sous-groupe de Lorentz de la représentation de masse positive et de spin nul du groupe de Poincaré