Literatura académica sobre el tema "Problèmes de valeurs propres mixtes"
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Artículos de revistas sobre el tema "Problèmes de valeurs propres mixtes"
Castillon, Philippe. "Problèmes de petites valeurs propres sur les surfaces de courbure moyenne constante". Proceedings of the American Mathematical Society 130, n.º 4 (12 de octubre de 2001): 1153–63. http://dx.doi.org/10.1090/s0002-9939-01-06295-5.
Texto completoBérard, Pierre. "Problèmes de valeurs propres et application à l'indice des surfaces de courbure moyenne constante". Séminaire de théorie spectrale et géométrie 18 (2000): 109–18. http://dx.doi.org/10.5802/tsg.225.
Texto completoKIRAKOSYAN, Armine. "LA SUBJECTIVITÉ LINGUISTIQUE DANS L’ACCEPTION DE CATHERINE KERBRAT-ORECCHIONI". Foreign Languages in Higher Education 19, n.º 1 (18) (10 de marzo de 2022): 3–10. http://dx.doi.org/10.46991/flhe/2015.19.1.003.
Texto completoFricker, Karen y Rémy Charest. "À l’heure zéro de la culture (dés)unie. Problèmes de représentation dans Zulu Time de Robert Lepage et Ex Machina". Globe 11, n.º 2 (8 de febrero de 2011): 81–116. http://dx.doi.org/10.7202/1000523ar.
Texto completoNizet, Isabelle. "Transitions de culture évaluative chez des futurs enseignants de l’enseignement secondaire". Phronesis 5, n.º 3-4 (2 de marzo de 2017): 55–68. http://dx.doi.org/10.7202/1039086ar.
Texto completoBéland, François y Delphine Arweiler. "Conceptual Framework for Development of Long-Term Care Policy 1. Constitutive Elements". Canadian Journal on Aging / La Revue canadienne du vieillissement 15, n.º 4 (1996): 649–81. http://dx.doi.org/10.1017/s0714980800009466.
Texto completoNessel, Camille y Elke Verhaeghe. "Unfolding the European Commission’s storytelling on ethical trade relations with Vietnam". CEVIPOL Working Papers N° 2, n.º 2 (9 de diciembre de 2020): 2–32. http://dx.doi.org/10.3917/lcdc1.202.0002.
Texto completoQuintin, Jacques, Luce Côté y Daniel Guimaraes. "Le suivi intensif dans la communauté et la consommation : quelques enjeux éthiques". Drogues, santé et société 14, n.º 2 (21 de octubre de 2016): 109–28. http://dx.doi.org/10.7202/1037735ar.
Texto completoNahmiash, Daphne. "T.F. Johnson (ed.). Elder Mistreatment: Ethical Issues, Dilemmas and Decisions. New York: Haworth Press, 1995." Canadian Journal on Aging / La Revue canadienne du vieillissement 16, n.º 4 (1997): 708–10. http://dx.doi.org/10.1017/s0714980800011077.
Texto completoSoula, Florian, Paolo Fallavollita, Luca Zappino, Marco Balsi, Salvatore Esposito y Maria Grazia Melis. "Remote sensing in archaeology. The state of the art and presentation of metadata research project's preliminary results". Revue Française de Photogrammétrie et de Télédétection, n.º 216 (19 de abril de 2018): 61–79. http://dx.doi.org/10.52638/rfpt.2018.352.
Texto completoTesis sobre el tema "Problèmes de valeurs propres mixtes"
Michetti, Marco. "Steklov and Neumann eigenvalues : inequalities, asymptotic and mixed problems". Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0109.
Texto completoThis thesis is devoted to the study of Neumann eigenvalues, Steklov eigenvalues and relations between them. The initial motivation of this thesis was to prove that, in the plane, the product between the perimeter and the first Steklov eigenvalue is always less then the product between the area and the first Neumann eigenvalue. Motivated by finding counterexamples to this inequality, in the first part of this thesis, we give a complete description of the asymptotic behavior of the Steklov eigenvalues in a dumbbell domain consisting of two Lipschitz sets connected by a thin tube with vanishing width. Using these results in the two dimensional case we find that the inequality is not always true. We study the inequality in the convex setting, proving a weaker form of the inequality for all convex domains and proving the inequality for a special class of convex polygons. We then also give the asymptotic behavior for Neumann and Steklov eigenvalues on collapsing convex domains, linking in this way these two eigenvalues with Sturm-Liouville type eigenvalues. In the second part of this thesis, using the results concerning the asymptotic behavior of Neumann eigenvalues on collapsing domains and a fine analysis of Sturm-Liouville eigenfunctions we study the maximization problem of Neumann eigenvalues under diameter constraint. In the last part of the thesis we study the mixed Steklov-Dirichlet. After a first discussion about the regularity properties of the Steklov-Dirichlet eigenfunctions we obtain a stability result for the eigenvalues. We study the optimization problem under a measure constraint on the set in which we impose Steklov boundary conditions, we prove the existence of a minimizer and the non-existence of a maximizer. In the plane we prove a continuity result for the eigenvalues under some topological constraint
Mitjana, Florian. "Optimisation topologique de structures sous contraintes de flambage". Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30343/document.
Texto completoTopology optimization aims to design a structure by seeking the optimal material layout within a given design space, thus making it possible to propose innovative optimal designs. This thesis focuses on topology optimization for structural problems taking into account buckling constraints. In a wide variety of engineering fields, innovative structural design is crucial. The lightening of structures during the design phase holds a prominent place in order to reduce manufacturing costs. Thus the goal is often the minimization of the mass of the structure to be designed. Regarding the constraints, in addition to the conventional mechanical constraints (compression, tension), it is necessary to take into account buckling phenomena which are characterized by an amplification of the deformations of the structure and a potential annihilation of the capabilities of the structure to support the applied efforts. In order to adress a wide range of topology optimization problems, we consider the two types of representation of a structure: lattice structures and continuous structures. In the framework of lattice structures, the objective is to minimize the mass by optimizing the number of elements of the structure and the dimensions of the cross sections associated to these elements. We consider structures constituted by a set of frame elements and we introduce a formulation of the problem as a mixed-integer nonlinear problem. In order to obtain a manufacturable structure, we propose a cost function combining the mass and the sum of the second moments of inertia of each frame. We developed an algorithm adapted to the considered optimization problem. The numerical results show that the proposed approach leads to significant mass gains over existing approaches. In the case of continuous structures, topology optimization aims to discretize the design domain and to determine the elements of this discretized domain that must be composed of material, thus defining a discrete optimization problem. [...]
Aboud, Fatima. "Problèmes aux valeurs propres non-linéaires". Phd thesis, Université de Nantes, 2009. http://tel.archives-ouvertes.fr/tel-00410455.
Texto completoL(z)=H_0+z H_1+...+ zm-1Hm-1+zm , où H0,H1,...,Hm-1 sont des opérateurs définis sur l'espace de Hilbert H et z est un paramètre complexe. On s'intéresse au spectre de la famille L(z). Le problème L(z)u(x)=0 est un problème aux valeurs propres non-linéaires lorsque m≥2 (Un nombre complexe z est appelé valeur propre de L(z), s'il existe u dans H, u≠0$ tel que L(z)u=0). Ici nous considérons des familles quadratiques (m=2) et nous nous intéressons en particulier au cas LP(z)=-∆x+(P(x)-z)2, définie dans l'espace de Hilbert L2(Rn), où P est un polynôme positif elliptique de degré M≥2. Dans cet exemple les résultats connus d'existence de valeurs propres concernent les cas $n=1$ et $n$ paire.
L'objectif principal de ce travail est de progresser vers la preuve de la conjecture suivante, formulée par Helffer-Robert-Wang : « Pour toute dimension n, pour tout M≥2, le spectre de LP est non vide. »
Nous prouvons cette conjecture dans les cas suivants : (1) n=1,3, pour tout polynôme P de degré M≥2. (2) n=5, pour tout polynôme P convexe vérifiant de plus des conditions techniques. (3) n=7, pour tout polynôme P convexe.
Ce résultat s'étend à des polynômes quasi-homogènes et quasi-elliptiques comme par exemple P(x,y)=x2+y4, x dans Rn1, y dans Rn2, n1+n2=n, et n paire.
Nous prouvons ces résultats en calculant les coefficients d'une formule de trace semi-classique et en utilisant le théorème de Lidskii.
Aboud, Fatima Mohamad. "Problèmes aux valeurs propres non-linéaires". Nantes, 2009. http://www.theses.fr/2009NANT2067.
Texto completoIn this work we study the polynomial family of operators L(¸) = H0+¸H1+· · ·+¸m−1Hm−1+¸m, where the coefficients H0,H1, · · · ,Hm−1 are operators dened on the Hilbert space H and ¸ is a complex parameter. We are interested to study the spectrum of the family L(¸). The problem L(¸)u(x) = 0, is called a non-linear eigenvalue problem for m ¸ 2 (The number ¸0 2 C is called an eigenvalue of L(¸), if there exists u0 2 H, u0 6= 0 such that L(¸0)u0 = 0). We consider here a quadratic family (m = 2) and in particular we are interested in the case LP (¸) = −¢x + (P(x) − ¸)2, which is dened on the Hilbert space L2(Rn), where P is an elliptic positive polynomial of degree M ¸ 2. For this example results for existence of eigenvalues are known for n = 1 and n is even. The main goal of our work is to check the following conjecture, stated by Heler-Robert-Wang : For every dimension n, for every M ¸ 2, the spectrum of LP is non empty. We prouve this conjecture for the following cases : • n = 1, 3, for every polynomial P of degree M ¸ 2. • n = 5, for every convex polynomial P satisfying some technical conditions. • n = 7, for every convex polynomial P. This result extends to the case of quasi-homogeneous polynomial and quasi-elliptic, for example P(x, y) = x2 + y4, x 2 Rn1 , y 2 Rn2 , n1 + n2 = n, and n is even. We prove this results by computing the coefficients of a semi-classical trace formula and by using the theorem of Lidskii
Chrayteh, Houssam. "Problèmes de valeurs propres pour des opérateurs multivoques". Poitiers, 2012. http://theses.univ-poitiers.fr/25162/2012-Chrayteh-Houssam-These.pdf.
Texto completoThe aim of our research is to study the existence and regularity of solutions for eigenvalue problems involving a →p-multivoque operator A : V → P(V*) on a smooth domain Ω C Rᶰ. Through N-functions, we construct a →p-multivoque Leray-Lions "strongly monotonic" operator on an anisotropic Orlicz-Sobolev space. We note that the theoretical formulation of problems related to such operator is essentially based on the notion of Clarke subdifferential. For this reason, we introduce new variational methods that match the resolution of these issues in the "subcritical" case where compactness plays an important role and critical case when we lose compactness. Various applications are given to illustrate our abstract results, for example, an anisotropic operator with variable exponents and an operator with a Hardy type weight
Conrad, Francis. "Perturbation de problèmes aux valeurs propres non linéaires et problèmes à frontière libre". Phd thesis, Université Claude Bernard - Lyon I, 1986. http://tel.archives-ouvertes.fr/tel-00830638.
Texto completoEmad, Petiton Nahid. "Contribution à la résolution de grands problèmes de valeurs propres". Paris 6, 1989. http://www.theses.fr/1989PA066174.
Texto completoRammal, Hadia. "Problèmes de Complémentarité aux Valeurs Propres : Théories, Algorithmes et Applications". Limoges, 2013. http://aurore.unilim.fr/theses/nxfile/default/08806eb2-33e6-4642-b821-b7218aaac0f2/blobholder:0/2013LIMO4036.pdf.
Texto completoThis manuscript deals with the development of mathematical methods applicable to the theoretical and numerical study of a wide class of unilateral problems. To put it more precisely, we consider the Pareto and Lorentz cones eigenvalue complementarity problems PCVP. Such problems appear in many scientific disciplines such as physics, mechanics and engineering. Firstly, we are interested to the resolution of PCVP using an adequate method, “Lattice Projection Method LPM”, leading to an efficient and effective result. The originality of this formulation in comparison with the existing literature is that it is not based on the complementarity approach. Then, our contribution is reflected in the study of the non-singularity conditions of the Jacobian matrices used in the semismooth Newton method SNM to detect solutions of such problems. Then, by using the performance profiles, we compare LPM with other solvers known in the literature. The results prove in accordance with the experimental observations and show the efficiency of LPM. Secondly, we treat the stochastic case of PCVP in the sense of Pareto and Lorentz cones. We reformulate such problem to find the zeros of a semismooth function. Furthermore, we study the non-singularity conditions of the Jacobian matrix of this function to solve such problems. Moreover, we transform the problem as a constrained minimization reformulation. Finally, we discuss the inverse Pareto eigenvalue complementarity problem PICVP. This task focuses more precisely on the resolution of PICVP where we present a new method, “Inverse Lattice Projection Method ILPM”, to solve such problems
Djellit, Ali. "Valeurs propres de problèmes elliptiques indéfinis sur des ouverts non bornés". Toulouse 3, 1992. http://www.theses.fr/1992TOU30072.
Texto completoKiwan, Rola. "Problèmes d'optimisation liés aux valeurs propres du Laplacien et aux pavages du plan [et] problèmes d'évolutions semi-linéaires". Tours, 2007. http://www.theses.fr/2007TOUR4001.
Texto completoIn this thesis, we consider first the optimal placement problem for the first Dirichlet Laplacian eingenvalue for plane domains with dihidral symetry, we then consider the same problem for the second eigenvalue of spherical shells. We solve the isoperimetric problem for plane domains who tile the plane by the action of a given lattice. Finally we study sufficient conditions for explosion in finite time for the solution of a non local parabolic problem as well as hyperbolic inequality
Libros sobre el tema "Problèmes de valeurs propres mixtes"
Bose, Arup y Koushik Saha. Random Circulant Matrices. Taylor & Francis Group, 2018.
Buscar texto completoBose, Arup y Koushik Saha. Random Circulant Matrices. Taylor & Francis Group, 2018.
Buscar texto completoBose, Arup y Koushik Saha. Random Circulant Matrices. Taylor & Francis Group, 2018.
Buscar texto completoBose, Arup y Koushik Saha. Random Circulant Matrices. Taylor & Francis Group, 2018.
Buscar texto completoRandom Circulant Matrices. Taylor & Francis Group, 2018.
Buscar texto completoCapítulos de libros sobre el tema "Problèmes de valeurs propres mixtes"
"Chapitre 12 Problèmes à conditions aux limites et problèmes aux valeurs propres". En Méthodes numériques appliquées, 281–300. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0990-5-013.
Texto completo"Chapitre 12 Problèmes à conditions aux limites et problèmes aux valeurs propres". En Méthodes numériques appliquées, 281–300. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0990-5.c013.
Texto completoActas de conferencias sobre el tema "Problèmes de valeurs propres mixtes"
Haderbache, Ahmed. "Prise de parole et quête de liberté : les espaces de l’eau dans Aïcha de Yamina Benguigui." En XXV Coloquio AFUE. Palabras e imaginarios del agua. Valencia: Universitat Politècnica València, 2016. http://dx.doi.org/10.4995/xxvcoloquioafue.2016.2998.
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