共查询到20条相似文献,搜索用时 15 毫秒
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Jürgen Pöschel 《Regular and Chaotic Dynamics》2011,16(1-2):17-23
Recently Rüssmann proposed a new variant of kam-theory based on a slowly converging iteration scheme. It is the purpose of this note to make this scheme accessible in an even simpler setting, namely for analytic perturbations of constant vector fields on a torus. As a side effect the result may be the shortest complete kam proof for perturbations of integrable vector fields available so far. 相似文献
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Max Karoubi 《Comptes Rendus Mathematique》2005,341(6):339-342
In this Note, we introduce a new morphism between algebraic and hermitian K-theory. The topological analog is the Adams operation in real K-theory. From this morphism, we deduce a lower bound for the higher algebraic K-theory of a ring A in terms of the classical Witt group of the ring . To cite this article: M. Karoubi, C. R. Acad. Sci. Paris, Ser. I 341 (2005). 相似文献
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《Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science》1998,326(3):335-338
On the unit ball of, one considers the standard hyperbolic metric H0 whose Ricci curvature equals R0 and Riemann-Christoffel curvature is. We prove that, for any symmetric tensor R near R0, there exists a unique metric H near H0 whose Ricci curvature is R. We deduce in the C∞ case that the image of the Riemann-Christoffel operator is a submanifold in a neighborhood of. Finally, we study more precisely the Ricci equation in dimension 2. 相似文献
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Jacques Deny 《Archiv der Mathematik》1954,5(4-6):367-370
Sans résuméEn hommage au professeurOstrowski 相似文献
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Saharon Shelah 《Israel Journal of Mathematics》2008,166(1):61-96
We show that, consistently, there is an ultrafilter on ω such that if N
nℓ = (P
nℓ ∪ Q
nℓ, P
nℓ, Q
nℓ, R
nℓ) (for ℓ = 1, 2, n < ω), P
nℓ ∪ Q
nℓ ⊆ ω, and are models of the canonical theory t
ind of the strong independence property, then every isomorphism from onto is a product isomorphism.
The first version of this work done in 93; First typed: May 1993.
This research was partially supported by the United States-Israel Binational Science Foundation. Publication 509 相似文献
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Valentin Seigneur 《Comptes Rendus Mathematique》2018,356(7):712-716
In this note, we are interested in the problem of extending a germ defined along the standard sphere and whose restriction to the sphere is Morse to a function F defined on the ball bounded by the sphere, without critical point. We give an algebraic necessary condition dealing with the Morse complexes of f with coefficients. 相似文献
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Résumé On étudie la différentiabilité de la fonction croissance d'une variété riemannienne complète. En général, elle a la même régularité qu'une fonction concave: la dérivée peut avoir des sauts pour lesquels on donne une formule. Dans le cas analytique réel, la fonction croissance est de classeC
1. Un exemple montre qu'elle n'est pas nécessairementC
2. A titre d'application, nous construisons, pour toute variété ouverte paracompacteM et toute fonction croissantev de classeC
1, une métrique continue de croissance égale àv et une métrique de classeC
surM de croissance proche dev en topologieC
1-fine.
Travail réalisé avec l'aide financière du MURST d'Italie. 相似文献
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We study the torsion subgroup of the universal ordinary distribution related to a general number field. We describe a way
to control this subgroup. We apply this method to the special case of an imaginary quadratic field, and we give examples of
such fields where these torsion subgroups are non-trivial.
Received: 4 January 2001 / Revised version: 17 May 2001 相似文献
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Jôyô Kanitani 《Annali di Matematica Pura ed Applicata》1962,57(1):151-172
Résumé Dans cet article nous introduisons d'abord un espace fibré principal B(M), P), oú M est une variété différentiable et P est
un sous-groupe du groupe d'homographique générale, et nous étudierons ensuite des propriétés géométriques de quelques constructions
qui se rattachent la connexion relative cet espace.
à M. Enrico Bompiani pour son Jubilé scientifique 相似文献
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Gabriel Thierrin 《Commentarii Mathematici Helvetici》1956,30(1):211-223
Sans résumé
Dédié à Monsieur S. Bays pour son soixante-dixième anniversaire 相似文献
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Michel Balazard 《Archiv der Mathematik》2008,90(1):31-38
We give an identity for the summatory function of the generalized von Mangoldt function
Received: 19 February 2007 相似文献
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《Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science》1999,328(3):203-208
We complete [3] and we give a purely K-theoretic proof of the Connes-Kasparov conjecture for semi-simple Lie groups. 相似文献
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《Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science》1997,324(12):1343-1348
Let V be a complex vector space of dimension n, %plane1D;53E; (resp. %plane1D;53E;*) the Grassmann manifold of p-dimensional (resp. (n — p)-dimensional) subspaces of V, and of Ω the relation of transversality in %plane1D;53E;*%plane1D;53E;*. We announced in [6] equivalences between derived categories of sheaves and of D-modules on %plane1D;53E; and %plane1D;53E; defined by the integral transforms associated to Ω. We show here that these transforms exchange the D-modules associated to the holomorphic line bundles on %plane1D;53E; and %plane1D;53E;*. This is equivalent to “quantizing” the underlying contact transformation between certain open dense subsets of the cotangent bundles. In the case p = 1, we recover already known results for the projective duality (see [1] and [5]). 相似文献