Letteratura scientifica selezionata sul tema "Opérateurs de décalage (théorie des opérateurs)"
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Articoli di riviste sul tema "Opérateurs de décalage (théorie des opérateurs)"
Blanc-Brude, Véronique, e Christian Defélix. "Des puces et des hommes : quand le travail « 4.0 » se révèle plus humain que prévu". Annales des Mines - Gérer et comprendre N° 153, n. 3 (13 settembre 2023): 49–59. http://dx.doi.org/10.3917/geco1.153.0049.
Testo completoDodier, Nicolas. "L’activité technique, les formes d’organisation du travail et la question de la société". Cahiers du Genre 19, n. 1 (1997): 95–113. http://dx.doi.org/10.3406/genre.1997.1024.
Testo completoHouimdi, Mohamed, e Hassane Zguitti. "Sur la théorie spectrale locale des shifts à poids opérateurs". International Journal of Mathematics and Mathematical Sciences 2005, n. 21 (2005): 3497–509. http://dx.doi.org/10.1155/ijmms.2005.3497.
Testo completoGérard, Christian. "Théorie des résonances pour des opérateurs de Schrödinger périodiques". Séminaire de théorie spectrale et géométrie 7 (1989): 25–30. http://dx.doi.org/10.5802/tsg.63.
Testo completoFaouzi, Abdelkhalek. "Verticalité en théorie des opérateurs linéaires (Étude des paires)". Linear Algebra and its Applications 326, n. 1-3 (marzo 2001): 111–20. http://dx.doi.org/10.1016/s0024-3795(00)00278-0.
Testo completoBlanc, Xavier, Claude Le Bris e Pierre-Louis Lions. "Une variante de la théorie de l'homogénéisation stochastique des opérateurs elliptiques". Comptes Rendus Mathematique 343, n. 11-12 (dicembre 2006): 717–24. http://dx.doi.org/10.1016/j.crma.2006.09.034.
Testo completoTAPIA, J. "K-théorie algébrique négative et K-théorie topologique de l'algèbre de fréchet des opérateurs régularisants". Annales Scientifiques de l’École Normale Supérieure 30, n. 2 (1997): 241–77. http://dx.doi.org/10.1016/s0012-9593(97)89920-x.
Testo completoColla, Enrico. "La « bulle » des marges arrière en France va-telle éclater ? L’impact de la législation sur la stratégie de négociation fabricants/distributeurs". Économies et Sociétés. Systèmes agroalimentaires 44, n. 932 (2010): 1557–75. http://dx.doi.org/10.3406/esag.2010.1028.
Testo completoSOSSOU, Maurel Loïs Ahlonko, Abdoulaye GAYE e Mohamed El Bachir WADE. "Facteurs explicatifs de l’adoption des services du mobile money par les clients des opérateurs de téléphonie mobile à Dakar". International Journal of Financial Accountability, Economics, Management, and Auditing (IJFAEMA) 3, n. 4 (26 luglio 2021): 393–416. http://dx.doi.org/10.52502/ijfaema.v3i4.106.
Testo completoMondello, Gérard. "La responsabilité environnementale des prêteurs : difficultés juridiques et ensemble des possibles". L'Actualité économique 88, n. 2 (23 settembre 2013): 257–78. http://dx.doi.org/10.7202/1018431ar.
Testo completoTesi sul tema "Opérateurs de décalage (théorie des opérateurs)"
Khochman, Abdallah. "Résonances et diffusion pour les opérateurs de Dirac et de Schrödinger magnétique". Thesis, Bordeaux 1, 2008. http://www.theses.fr/2008BOR13689/document.
Testo completoIn this thesis, we consider equations of mathematical physics. First, we study the reso- nances and the spectral shift function for the semi-classical Dirac operator and the magnetic Schrö- dinger operator in three dimensions. We de?ne the resonances as the eigenvalues of a non-selfadjoint operator obtained by complex distortion. For the Dirac operator, we establish an upper bound O(h-3), as the semi-classical parameter h tends to 0, for the number of resonances. In the Schrödinger magne- tic case, the reference operator has in?nitely many eigenvalues of in?nite multiplicity embedded in its continuous spectrum. In a ring centered at one of this eigenvalues with radiuses (r, 2r), we establish an upper bound, as r tends to 0, of the number of the resonances. A Breit-Wigner approximation formula for the derivative of the spectral shift function related to the resonances and a local trace formula are obtained for the considered operators. Moreover, we prove a Weyl-type asymptotic of the SSF for the Dirac operator with an electro-magnetic potential. Secondly, we consider the semi-classical Dirac ope- rator on R with potential having constant limits, not necessarily the same at ±8. Using the complex WKB method, we construct analytic solutions for the Dirac operator. We study the scattering theory in terms of incoming and outgoing solutions. We obtain an asymptotic expansion, with respect to the semi-classical parameter h, of the scattering matrix in di?erent cases, in particular, in the case when the Klein paradox occurs. Quantization conditions for the resonances and for the eigenvalues of the one-dimensional Dirac operator are also obtained
Tang, Yiyu. "Topics in Fourier analysis : uncertainty principles and lacunary approximation". Electronic Thesis or Diss., Université Gustave Eiffel, 2024. http://www.theses.fr/2024UEFL2026.
Testo completoThis thesis is devoted to the study of uncertainty principles and approximation problems in Fourier analysis. It consists two parts.The first part focus on uncertainty principles in Fourier analysis. Using a technique recently invented by Avi Wigderson and Yuval Wigderson, we give a new proof of the classical Heisenberg uncertainty principle, hence answering several questions affirmatively posed by Wigderson & Wigderson. Also, we obtain some other new generalization on uncertainty principle, which illustrates the power of the new method.The second part is about approximation on weighted sequence spaces. We generalize an old result due to Douglas, Shapiro and shields on cyclic vectors of shift operator in sequence spaces, which asserts that if an element in l^2 spaces has a ``sparse" spectrum, then its shifts can not be concentrated on a proper subset, hence they must spread out in the whole space. This phenomenon can also be roughly considered as an uncertainty principle, and it is also true for p greater than 2 and false for 1
Michard, Romain. "Opérateurs arithmétiques matériels optimisés". Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2008. http://tel.archives-ouvertes.fr/tel-00301285.
Testo completoAssal, Marouane. "Analyse spectrale des systèmes d'opérateurs h-pseudodifférentiels". Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0586/document.
Testo completoIn this work, we are interested in the spectral analysis of systems of semiclassical pseudodifferentialoperators. In the first part, we study the extension of the long time semiclassical Egorovtheorem in the case where the quantum Hamiltonian which generates the time evolution andthe initial quantum observable are two semiclassical pseudodifferential operators with matrixvaluedsymbols. Under an hyperbolicity condition on the principal symbol of the Hamiltonianwhich ensures the existence of the semiclassical projections, and for a class of observable thatare "semi-classically" block-diagonal with respect to these projections, we prove an Egorov theoremvalid in a large time interval of order log(h-1) known as the Ehrenfest time. Here h & 0is the semiclassical parameter.In the second part, we are interested in the spectral and scattering theories for self-adjointsystems of pseudodifferential operators. We develop a stationary approach for the study of thespectral shift function (SSF) associated to a pair of self-adjoint semiclassical Schrödinger operatorswith matrix-valued potentials. We prove a Weyl-type asymptotics with sharp remainderestimate on the SSF, and under the existence of a scalar escape function, a pointwise completeasymptotic expansion on its derivative. This last result is a generalisation in the matrix-valuedcase of a result of Robert and Tamura established in the scalar case near non-trapping energies.Our time-independent method allows us to treat certain potentials with energy-level crossings
Hachadi, Hicham. "Opérateurs de Hankel et théorie spectrale locale". Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4723.
Testo completoThis thesis consists of two main parts, the first part is devoted to the study of Hankel operators of antiméromorphes symbols, more precisely, we are interested in the possibility of obtaining Hankel operators bounded (resp. compact, in Schatten classes) which the symbols are not necessarily polynomials.We will give in first step, the necessary and sufficient conditions for the operator H_ {f} defined on a ring in the complex plane is bounded (resp. compact in the p-th Schatten class) and we treat examples on which we show that the Hankel operators H_ {f} and H_ {Uf} are simultaneously bounded (resp. compact, in the Schatten classes) if and only if f is a Laurent polynomial and conditions set relate to its L-degree.The second part deals with common spectral properties of operators A and B satisfying the equation A ² = ABA and B ² = BAB. We will generalize the results of Christopher Schmoeger on equality different spectra of these operators, then we will expand the field of study of these operators in the direction of the local spectral theory (SVEP, Decomposability)
Tran-Oberlé, Chantal. "Analyticité en dimension infinie et théorie des opérateurs". Paris 11, 1987. http://www.theses.fr/1987PA112013.
Testo completoHuang, Yi. "Théorie des opérateurs sur les espaces de tentes". Thesis, Université Paris-Saclay (ComUE), 2015. http://www.theses.fr/2015SACLS100/document.
Testo completoWe give a Calderón-Zygmund type machinery concerning the extrapolation theory for thesingular integral operators on tent spaces. For maximal regularity operators on tent space, wegive some optimal results by exploiting the structure of convolution integral operators and byusing the off-diagonal decay estimates of the underlying semigroup or resolvent family.We apply the previous harmonic and functional analysis techniques to estimate on tentspaces certain evolutionary integral operators arisen from the study of boundary value ellipticproblems and first order non-autonomous systems
Elhraichi, Jamal. "Décomposition canonique et classification de Nagy-Foias d'une contraction : cas des opérateurs normaux, cas des opérateurs de Toeplitz". Lyon 1, 1985. http://www.theses.fr/1985LYO11657.
Testo completoSkhiri, Haykel. "Opérateurs semi-Fredholm : structures et approximations". Lille 1, 1997. http://www.theses.fr/1997LIL10172.
Testo completoLe premier theme de cette partie est consacre aux operateurs -semi-fredholm. Nous montrons un theoreme qui etend a cette classe d'operateurs le theoreme de kato sur la stabilite des operateurs semi-fredholm par les petites perturbations. Nous nous interessons aussi aux points de continuite de la conorme de poids. Le second theme est consacre aux operateurs semi-fredholm. Nous calculons plusieurs formmules de distance liees aux operateurs semi-fredholm. Nous etudions la structure des composantes connexes semi-fredholm en utilisant d'autres moyens que ceux employees dans la premiere partie. Enfin, nous terminons par un exemple simplifie qui montre que certains resultats obtenus dans la premiere partie sont uniquement valables dans le cas separable
Turcu, Flavius. "Propriétés de factorisation pour les algèbres duales engendrées par certaines multi-contractions sphériques". Bordeaux 1, 2002. http://www.theses.fr/2002BOR12494.
Testo completoLibri sul tema "Opérateurs de décalage (théorie des opérateurs)"
Charles, Josette. Analyse fonctionnelle et théorie des opérateurs. Paris: Dunod, 2010.
Cerca il testo completoJay, Axler Sheldon, McCarthy John E. 1964- e Sarason Donald, a cura di. Holomorphic spaces. Cambridge: Cambridge University Press, 1998.
Cerca il testo completoPatrick, Le Tallec, a cura di. Augmented Lagrangian and operator-splitting methods in nonlinear mechanics. Philadelphia: Society for Industrial and Applied Mathematics, 1989.
Cerca il testo completoGrubb, Gerd. Distributions and operators. New York: Springer, 2009.
Cerca il testo completoKadison, Richard V. Fundamentals of the theory of operator algebras. Providence, R.I: American Mathematical Society, 1997.
Cerca il testo completoAlain, Largillier, e Limaye Balmohan Vishnu, a cura di. Spectral computations for bounded operators. Boca Raton: Chapman & Hall/CRC, 2001.
Cerca il testo completoEdmunds, D. E. Spectral theory and differential operators. Oxford [England]: Clarendon Press, 1990.
Cerca il testo completoSakai, Shôichirô. Operator algebras in dynamical systems: The theory of unbounded derivations in C*-algebras. Cambridge [England]: Cambridge University Press, 1991.
Cerca il testo completoDales, H. G. Introduction to Banach algebras, operators, and harmonic analysis. Cambridge, U.K: Cambridge University Press, 2003.
Cerca il testo completoauthor, Triebel Hans, a cura di. Distributions, Sobolev Spaces, Elliptic Equations. Zuerich, Switzerland: European Mathematical Society Publishing House, 2007.
Cerca il testo completoCapitoli di libri sul tema "Opérateurs de décalage (théorie des opérateurs)"
Lewin, Mathieu. "Spectre des opérateurs auto-adjoints". In Théorie spectrale et mécanique quantique, 163–220. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-93436-1_5.
Testo completoLewin, Mathieu. "Opérateurs de Schrödinger périodiques et propriétés électroniques des matériaux". In Théorie spectrale et mécanique quantique, 247–75. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-93436-1_7.
Testo completoCharles, Josette, Mostafa Mbekhta e Hervé Queffélec. "Références". In Analyse fonctionnelle et théorie des opérateurs, 265–67. Dunod, 2010. http://dx.doi.org/10.3917/dunod.charl.2010.01.0265.
Testo completoPoinsot, Olivier, Francois Moro e Pierre-Laurent Vidal. "Jurisprudences du secteur social et médico-social". In Jurisprudences du secteur social et médico-social, 151–218. Dunod, 2012. http://dx.doi.org/10.3917/dunod.vial.2012.01.0151.
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