共查询到20条相似文献,搜索用时 31 毫秒
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Sans résumé 相似文献
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《Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science》1997,324(11):1227-1230
We consider a semigroup of Markovian and symmetric operators to which we associate fractional Sobolev spaces Dαp (0 < α < 1 and 1 < p < ∞) defined as domains of fractional powers (−Ap)α/2, where Ap is the generator of the semigroup in Lp. We show under rather general assumptions that Lipschitz continuous functions operate by composition on Dαp if p ≥ 2. This holds in particular in the case of the Ornstein-Uhlenbeck semigroup on an abstract Wiener space. 相似文献
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Integrales convexes dans les espaces de Sobolev 总被引:8,自引:0,他引:8
Haim Brezis 《Israel Journal of Mathematics》1972,13(1-2):9-23
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We prove that stable Banach spaces, introduced by J. L. Krivine and B. Maurey [7], are weakly sequentially complete and that
every spreading model defined on a stable Banach space is stable.
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G. Vranceanu 《Annali di Matematica Pura ed Applicata》1974,98(1):33-46
Summary It is shown that on an exotique space V2n−1 of Kervaire type, we can construct a Morse function having only four critical points, the maximum, the minimum and two points
of index n−1 and n.
Entrata in Redazione il 20 ottobre 1972. 相似文献
Entrata in Redazione il 20 ottobre 1972. 相似文献
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Given a closed operatorA acting in a Banach spaceX, we define the regular (respectively the essentialy regular) spectrum σ r (A) (respectively σ e,r (A)) ofA. We prove that σ r (A) and σ e,r (A) are a closed subsets of the classical spectrum σ(A) ofA. Morever ifA is bounded we prove that σ r (A) and σ e,r (A)) satisfies the spectral mapping theorem. 相似文献
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A. Martineau 《Mathematische Annalen》1966,163(1):62-88
Sans résuméA MonsieurG. Köthe pour son 60e anniversaire 相似文献
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Djalil Kateb 《Proceedings of the American Mathematical Society》2000,128(3):735-743
Soient , et trois réels tels que , , et et soit une fonction appartenant à l'espace de Besov . Nous montrons que si est une fonction, de la variable réelle, nulle à l'origine, lipschitzienne et appartenant à l'espace on a alors . La preuve est essentiellement basée sur des résultats d'approximation par des fonctions splines de degré .
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Guy Rousseau 《Geometriae Dedicata》1990,35(1-3):31-42
The affine Weyl group W
aof an irreducible root system of rank n acts on the complexification h of a real space of dimension n via the usual (affine) action on the imaginary part and the action through the finite Weyl group on the real part. This group acts freely on the complement h of some complex hyperplanes. We prove a presentation of the fundamental group of the quotient hW
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A Jacques Tits pour son soixantième anniversaire 相似文献
A Jacques Tits pour son soixantième anniversaire 相似文献
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Michel Talagrand 《Israel Journal of Mathematics》1983,44(3):213-220
A separable Banach lattice has the Radon-Nikodym property if and only if it is isometrically the dual of a Banach lattice. 相似文献
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In this paper, we outline the construction of obstructions tok-formality wherek is a field of arbitrary characteristic. We show that the obstructions to intrinsick-formality of a graded algebraH
* lie in the Hochschild cohomologyH H
m,1
(H
*/k, H
*). We calculate explicitly the Hochschild cohomology of the algebraH(ℂP
∞/ℂP
n
;k) and deduce that the stunted complex projective space ℂP
∞/ℂP
n
is intrinsicallyk-formal for any fieldk.
This article was processed by the author using the LATEX style filecljour1 from Springer-Verlag. 相似文献
This article was processed by the author using the LATEX style filecljour1 from Springer-Verlag. 相似文献
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