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Artykuły w czasopismach na temat "Étude de régularité"
Merker, Joël. "Étude de la régularité analytique de l'application de réflexion CR formelle". Annales de la faculté des sciences de Toulouse Mathématiques 14, nr 2 (2005): 215–330. http://dx.doi.org/10.5802/afst.1094.
Pełny tekst źródłaAlliance, MURHULA SAFARI. "LA PROBLEMATIQUE DE RECOUVREMENT DES CREANCES COMMERCIALESA LA SOCIETE NATIONALE D’ELECTRICITE BUKAVU". IJRDO - Journal of Business Management 8, nr 12 (20.12.2022): 23–31. http://dx.doi.org/10.53555/bm.v8i12.5485.
Pełny tekst źródłaOnana, Simon Pierre. "Les mécanismes du budget programme permettent-ils d’améliorer l’efficience des dépenses publiques ? Eléments de théorie et données empiriques au Cameroun". Revue Internationale des Sciences Administratives Vol. 90, nr 1 (2.04.2024): 185–202. http://dx.doi.org/10.3917/risa.901.0185.
Pełny tekst źródłaLaschon, Gilles. "Étude symbolique de la perte de régularité C∞ par morceaux dans l'interaction d'ondes semi-linéaires". Comptes Rendus de l'Académie des Sciences - Series I - Mathematics 328, nr 10 (maj 1999): 865–70. http://dx.doi.org/10.1016/s0764-4442(99)80287-0.
Pełny tekst źródłaConti, Marco. "Normes d’écriture et exigences administratives". Revue française d'histoire du livre 142 (13.10.2021): 107–22. http://dx.doi.org/10.47421/rfhl142_107-122.
Pełny tekst źródłaDimitradi, Leda. "Le Corbusier et la géométrie dans la pratique. Etude de deux exemples singuliers". LC. Revue de recherches sur Le Corbusier, nr 9 (27.03.2024): 68–83. http://dx.doi.org/10.4995/lc.2024.19870.
Pełny tekst źródłaEl Assel, N., A. Kchikach, C. Durlet, N. AlFedy, K. El Hariri, M. Charroud, M. Jaffal, E. Jourani i M. Amaghzaz. "Mise en évidence d’un Sénonien gypseux sous la série phosphatée du bassin des Ouled Abdoun: Un nouveau point de départ pour l’origine des zones dérangées dans les mines à ciel ouvert de Khouribga, Maroc". Estudios Geológicos 69, nr 1 (30.06.2013): 47. http://dx.doi.org/10.3989/egeol.40781.168.
Pełny tekst źródłaLavieu-Gwozdz, Belinda. "Qu’est-ce qui s’affiche en Étude de la langue au cycle 3 ? Ce que les affichages révèlent de leurs concepteurs". SHS Web of Conferences 186 (2024): 02008. http://dx.doi.org/10.1051/shsconf/202418602008.
Pełny tekst źródłaWamba, Henri, i Louise Tchamanbé-Djiné. "Information financière et politique d’offre de crédit bancaire aux PME : cas du Cameroun". Revue internationale P.M.E. 15, nr 1 (16.02.2012): 87–114. http://dx.doi.org/10.7202/1008802ar.
Pełny tekst źródłaLemghari, El Mustapha. "Le nom propre en lecture qualitative : de la métonymie à la métaphtonymie". SHS Web of Conferences 46 (2018): 12004. http://dx.doi.org/10.1051/shsconf/20184612004.
Pełny tekst źródłaRozprawy doktorskie na temat "Étude de régularité"
Sedro, Julien. "Étude de systèmes dynamiques avec perte de régularité". Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS254/document.
Pełny tekst źródłaThe aim of this thesis is the development of a unified framework to study the regularity of certain characteristics elements of chaotic dynamics (Topological presure/entropy, Gibbs measure, Lyapunov exponents) with respect to the dynamic itself. The main technical issue is the regularity loss occuring from the use of a composition operator, the transfer operator, whose spectral properties are intimately connected to the aformentionned "characteristics elements". To overcome this issue, we developped a regularity theorem for fixed points (with respect to parameter), in the spirit of the implicit function theorem of Nash and Moser. We then apply this "fixed point" approach to the linear response problem (studying the regularity of the system invariant measure w.r.t parameters) for a family of uniformly expanding maps. In a second time, we study the regularity of the top characteristic exponent of a random prduct of expanding maps, building from our regularity theorem and cone contraction theory. We deduce from this regularity w.r.t parameters for the stationanry measure, the variance in the central limit theorem, and other quantities of dynamical interest
Mastrolia, Thibaut. "Une étude de la régularité de solutions d'EDS Rétrogrades et de leurs utilisations en finance". Thesis, Paris 9, 2015. http://www.theses.fr/2015PA090066.
Pełny tekst źródłaIn the first part of this PhD thesis, we give conditions on the parameters of Lipschitz and quadratic growth BSDEs such that the laws of the components Y and Z of the solutions to such BSDEs admit densities with respect to the Lebesgue measure. We then provide conditions on the parameters of non-Markovian Lipschitz or quadratic growth BSDEs such that the components Y and Z of their solutions are Malliavin differentiable. We obtain these conditions by applying a new characterization of the Malliavin differentiability, as an Lp convergence criterion of difference quotients. This result provide also a new characterization of the Malliavin-Sobolev spaces that we study in detail. To finish this first theoretical part, we provide conditions ensuring that solutions of non-Markovian stochastic-Lipschitz BSDEs are Malliavin differentiable by applying the characterization of the Malliavin differentiability obtained. We then analyse the existence of densities for the laws of the components of solutions to such BSDEs and we apply our result to a model of gene expression. In the second part of this thesis, we investigate financial problems dealing with BSDEs. We first solve a utility maximization problem with a random horizon, characterized by an exogenous default time. We reduce it to the analysis of a specific BSDE, which we call BSDE with singular coefficients, when the default time is assumed to be bounded. We give conditions ensuring the existence and the uniqueness of solutions to such BSDE and we illustrate our results by numerical simulations. Then, we solve a Principal/Agent problem with ambiguity, in which the "Nature" impacts both the utilities of the Agent and the Principal, charaterized by sets of probability measures which modify the volatility
Zhang, Xin. "Étude qualitative des solutions du système de Navier-Stokes incompressible à densité variable". Thesis, Paris Est, 2017. http://www.theses.fr/2017PESC1215/document.
Pełny tekst źródłaThis thesis is dedicated to two different problems in the mathematical study of the viscous incompressible fluids: the persistence of tangential regularity and the motion of a free surface.The first problem concerns the study of the qualitative properties of some thermodynamical quantities in incompressible fluid models, such as the temperature for Boussinesq system with no diffusion and the density for the non-homogeneous Navier-Stokes system. Typically, we assume those two quantities to be initially piecewise constant along an interface with H"older regularity.As a consequence of stability of certain directional smoothness of the velocity field, we establish that the regularity of the interfaces persist globally with respect to time both in the two dimensional and higher dimensional cases (under some smallness condition). Our strategy is borrowed from the pioneering works by J.-Y.Chemin in 1990s on the vortex patch problem for ideal fluids.Let us emphasize that, apart from the directional regularity, we only impose rough (critical) regularity on the velocity field. The proof requires tools from para-differential calculus and multiplier space theory.In the last part of this thesis, we are concerned with the free boundary value problem for two-phase density-dependent Navier-Stokes system.This model is used to describe the motion of two immiscible liquids, like the oil and the water. Such mixture may occur in different situations, such as in a fixed bounded container, in a moving bounded droplet or in a river with finite depth. We establish the short time well-posedness for this problem. Our result strongly relies on the $L_p$-$L_q$ maximal regularity theoryfor parabolic equations
Ellatifi, Abdelkader. "Quelques résultats d'allocation de fréquences en dimension 3 et étude de la régularité de la solution d'inéquations variationnelles non locales". Metz, 1996. http://www.theses.fr/1996METZ059S.
Pełny tekst źródłaRing, Hubertus. "Régularité et chaos : étude de la molécule de disulfure de carbone (CS2) par spectroscopie de fluorescence et double résonance infrarouge-ultraviolet". Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10075.
Pełny tekst źródłaCao, Hongmei. "Problémes bien-posés et étude qualitative pour des équations cinétiques et des équations dissipatives". Thesis, Normandie, 2019. http://www.theses.fr/2019NORMR044/document.
Pełny tekst źródłaIn this thesis, we study some kinetic equations and some partial differential equations with dissipative mechanism, such as Boltzmann equation, Landau equation and some non-symmetric hyperbolic systems with dissipation type. Global existence of solutions or optimal decay rates of solutions for these systems are considered in Sobolev spaces or Besov spaces. Also the smoothing properties of solutions are studied. In this thesis, we mainly prove the following four results, see Chapters 3-6 for more details. For the _rst result, we investigate the Cauchy problem for the inhomogeneous nonlinear Landau equation with Maxwellian molecules ( = 0). See from some known results for Boltzmann equation and Landau equation, their global existence of solutions are mainly proved in some (weighted) Sobolev spaces and require a high regularity index, see Guo [62], a series works of Alexandre-Morimoto-Ukai-Xu-Yang [5, 6, 7, 9] and references therein. Recently, Duan-Liu-Xu [52] and Morimoto-Sakamoto [145] obtained the global existence results of solutions to the Boltzmann equation in critical Besov spaces. Motivated by their works, we establish the global existence of solutions for Landau equation in spatially critical Besov spaces in perturbation framework. Precisely, if the initial datum is a small perturbation of the equilibrium distribution in the Chemin-Lerner space eL 2v (B3=2 2;1 ), then the Cauchy problem of Landau equation admits a global solution belongs to eL 1t eL 2v (B3=2 2;1 ). Our results improve the result in [62] and extend the global existence result for Boltzmann equation in [52, 145] to Landau equation. Secondly, we consider the Cauchy problem for the spatially nhomogeneous non-cuto_ Kac equation. Lerner-Morimoto-Pravda-Starov-Xu [117] considered the spatially inhomogeneous non-cuto_ Kac equation in Sobolev spaces and showed that the Cauchy problem for the uctuation around the Maxwellian distribution admitted S 1+ 1 2s 1+ 1 2s Gelfand-Shilov regularity properties with respect to the velocity variable and G1+ 1 2s Gevrey regularizing properties with respect to the position variable. And the authors conjectured that it remained still open to determine whether the regularity indices 1+ 1 2s is sharp or not. In this thesis, if the initial datum belongs to the spatially critical Besov space eL 2v (B1=2 2;1 ), we prove the well-posedness to the inhomogeneous Kac equation under a perturbation framework. Furthermore, it is shown that the weak solution enjoys S 3s+1 2s(s+1) 3s+1 2s(s+1) Gelfand-Shilov regularizing properties with respect to the velocity variableand G1+ 1 2s Gevrey regularizing properties with respect to the position variable. In our results, the Gelfand-Shilov regularity index is improved to be optimal. And this result is the _rst one that exhibits smoothing e_ect for the kinetic equation in Besov spaces. About the third result, we consider compressible Navier-Stokes-Maxwell equations arising in plasmas physics, which is a concrete example of hyperbolic-parabolic composite systems with non-symmetric dissipation. It is observed that the Cauchy problem for Navier-Stokes-Maxwell equations admits the dissipative mechanism of regularity-loss type. Consequently, extra higher regularity is usually needed to obtain the optimal decay rate of L1(R3)-L2(R3) type, in comparison with that for the global-in-time existence of smooth solutions
Dahoumane, Fabien. "Étude de l'approximation hydrostatique de Stokes & d'une équation dégénérée". Phd thesis, Université de Pau et des Pays de l'Adour, 2009. http://tel.archives-ouvertes.fr/tel-00444885.
Pełny tekst źródłaKrim, Abdelaaziz. "Les noms verbaux dans le parler berbère de ksar Tit n'Ali : étude morphophonologique". Thesis, Sorbonne Paris Cité, 2016. http://www.theses.fr/2016INAL0004.
Pełny tekst źródłaThis thesis contributes to the study about nouns related to verbs of the berber language spoken in Ksar Tit n’Ali (a region located on the Valley of High Guir in southern Morocco). This work aims to show, firstly, the nouns derived from verbs considered “common”or “normal” which refer to an action, in this case: action nouns, agent nouns and instrument nouns. Secondly, the verbs derived from stative verbs, especially: quality nouns and nouns we called unofficially stative nouns. As we analysed the collected informations, we found out that the existence of plenty of verbal roots and the implementation of several strategies makes this derivational operation very far from being clear. Our goal is to demonstrate the various mechanisms operated to reconcile between a - concatenative- external morphology and internal morphology -non concatenative- in order to achieve a pattern. We aim to clear the final templatic scheme that is subject to major constraints on the lexicon or the result of a morphological process. In addition, given the importance of the left site in the derivation of nominal units, we devoted a chapter to the question of the initial vowel equipment and its relationship with the passage from free status of an item to its status of annexation. Starting from the findings of predecessors and analyzing the elements of the spoken language, which is the object of our research, we realize fertility of linguistic literature in this case has not resolved our problematic completely
Mouhot, Clément. "Étude mathématique de quelques équations cinétiques collisionnelles". Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2004. http://tel.archives-ouvertes.fr/tel-00008338.
Pełny tekst źródład'intégrabilité pour des interactions à longue portée. D'autre part, nous quantifions la positivité des solutions spatialement
inhomogènes, sous des hypothèses de régularité. Dans la deuxième partie, nous donnons des estimations de trou spectral et de coercivité sur les opérateurs de Boltzmann et Landau linéarisés, puis nous prouvons la convergence exponentielle vers l'équilibre avec taux explicite pour un gaz de sphères dures spatialement homogènes. Dans la troisième partie, nous considérons l'équation de Boltzmann spatialement homogène pour les gaz granulaires, pour laquelle nous construisons des solutions pour des modèles d'inélasticité réalistes (mais fortement non-linéaires) et discutons la possibilité de « gel » en temps fini ou asymptotiquement. Puis nous montrons l'existence de profils auto-similaires et étudions le comportement de la solution pour les grandes vitesses. Dans la quatrième partie, nous utilisons une semi-discrétisation de l'opérateur de Boltzmann pour proposer
des schémas numériques rapides basés sur les méthodes spectrales ou les méthodes par discrétisation des vitesses.
Boussaid, Nabile. "Étude de la stabilité des petites solutionsstationnaires pour une classe d'équations de Dirac non linéaires". Phd thesis, Université Paris Dauphine - Paris IX, 2006. http://tel.archives-ouvertes.fr/tel-00108459.
Pełny tekst źródłastabilité de petits états stationnaires d'une équation d'évolution
non linéaire issue de la mécanique quantique relativiste :
l'équation de Dirac non linéaire.
Tout le long de notre étude, les équations non linéaires sont vues
comme des petites perturbations non linéaires de systèmes linéaires.
Une partie de cette thèse est donc consacrée à l'étude de problèmes
linéaires. Nous montrons que, pour un opérateur de Dirac n'ayant pas
de résonance aux seuils ni de valeur propre aux seuils, le
propagateur vérifie des estimations de propagation et de dispersion.
Nous en déduisons également des estimations de régularité au sens de
Kato et des estimations de Strichartz.
En faisant des hypothèses ad hoc sur le spectre discret d'un
opérateur de Dirac, nous construisons des petites variétés formées
d'états stationnaires. Puis en faisant varier ces hypothèses, nous
faisons apparaître des phénomènes de stabilisation et d'instabilité
orbitale pour certains de ces états.
Części książek na temat "Étude de régularité"
WALLIAN, Nathalie, i Eric JACQUART. "Chevaucher sur le fil du rasoir". W Les savoirs de l'extrême, 349–402. Editions des archives contemporaines, 2024. http://dx.doi.org/10.17184/eac.8291.
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