共查询到20条相似文献,搜索用时 15 毫秒
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《Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science》1999,328(11):999-1002
We introduce a notion of characteristic codirections for 2 × 2 systems of conservation laws in two-dimensional space. These codirections are used to construct rarefaction waves. 相似文献
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Sans résumé
Institut de mathématiques appliquées de l’Ecole Polytechnique de l’Université de Lausanne. Recherche subventionnée par le
Fonds national suisse de la recherche scientifique. 相似文献
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In this Note, we prove a Carleman's estimate for the integro-differential hyperbolic system of the viscoelasticity problem and we use this estimate to obtain a stability result for the inverse problem of recovering a viscoelastic coefficient from a unique internal measure. To cite this article: M. de Buhan, A. Osses, C. R. Acad. Sci. Paris, Ser. I 347 (2009). 相似文献
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《Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science》1997,324(2):159-164
The purpose of this Note is to study the dynamic of a problem of mass and heat transfer in the presence of a chemical reaction. 相似文献
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《Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science》1999,328(7):591-596
Using a direct approach, we prove the asymptotic stability of Kirchhoff plates in the absence of compactness of the resolvent. We also establish the polynomial energy decay rate for the smooth solutions. 相似文献
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Emmanuel Opshtein 《Mathematische Annalen》2006,335(1):1-30
Summary This paper deals with proper holomorphic self-maps of smoothly bounded pseudoconvex domains in . We study the dynamical properties of their extension to the boundary and show that their non-wandering sets are always contained
in the weakly pseudoconvex part of the boundary. In the case of complete circular domains, we combine this fact with an entropy/degree
argument to show that the maps are automorphisms. Some of our results remain true in 相似文献
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《Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science》1999,328(2):99-104
According to a theorem first stated by Clifford, Noether [8] and Rosanes [12], which later received a complete proof by Castelnuovo [2], the Cremona group of the plane is generated by de Jonquières transformations. J.F. Ritt [10] asked whether such a result could be generalized to the differential plane. We give a negative answer, relying on a flat system of Rouchon. 相似文献
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《Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science》1998,326(6):743-748
Reliability of large system can be evaluated from the probability q of failure before restoration. In [8], the authors give an asymptotic approximation with monotone sequences for a k/n system. We propose, here, a bounding for q in a more general case, and apply in ageing property case. 相似文献
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《Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science》1999,328(3):257-262
We prove a central limit theorem for degenerate U-processes under a metric entropy with bracketing condition. More precisely, we give an analogue of Ossiander's Theorem for empirical processes. All calculations use the chaining argument with adaptative truncations initiated by Bass [4]. 相似文献
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Resumé Nous applíquons les résultats de [2] à la construction d'analyses multirésolutions et en particulier à l'étude de pavages auto-affines de
d
. Nous montrons qu'une tuile auto-affine, construite à partir d'une matrice dilatante à coefficients entiers, permet de paver
d
par translation par les éléments d'un réseau.
We applied results from [2] to multiresolution analysis and to lattice tilings of d with self-affine tiles.相似文献
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《Comptes Rendus Mathematique》2008,346(17-18):1017-1022
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《Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science》1998,326(9):1141-1144
We consider the nonparametric regression model with regression function ƒ. We construct tests for hypotheses on Fourier coefficients of ƒ in a given band of frequencies. Such tests can be used in particular to compare two noisy signals in a frequency band. The test statistics, we use, are based on the empirical Fourier coefficients of the regression function ƒ. 相似文献
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Paul Lévy 《Annali di Matematica Pura ed Applicata》1961,53(1):315-331
Résumé Le plus important des problèmes traités est celui du prolongement d'une fonction caractéristique donnée dans un intervalle
ou dans une réunion d'intervalles. Malgré un beau théorème deM. Krein, ce problème ne peut pas être consdéré comme résolu. On donne ici quelques conditions qui sont, soit nécessaires, soit suffisantes
pour la possibitité et pour l'unicité du prolongement.
à M. Enrico Bompiani pour son Jubilé scientifique. 相似文献
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Cristián Mallol 《代数通讯》2017,45(8):3555-3586
We study the ideal of polynomial identities of a single indeterminate satisfied by all backcrossing algebras. For this we distinguish two categories according to whether or not these algebras satisfy an identity for the plenary powers. For each category, we give the generators for the vector space of identities, a condition for any object belonging to one of these two categories verify a given identity, a necessary and su?cient condition that a polynomial is an identity and we study the existence of an idempotent element. We give a method which brings the search of identities satified by the backcrossing algebras to the solution of linear systems and we illustrate this method by constructing generators of homogeneous and non homogeneous identities of degrees less than 8. 相似文献