Download or read book Contribution a l tude des quations aux d riv es partielles non lin aires written by Thierry Gallouët and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: PROBLEMES DEMI-LINEAIRES A L'INFINI. CAS LIMITES DANS LES INJECTIONS DE SOBOLEV. EQUATIONS ELLIPTIQUES SEMI-LINEAIRES AVEC NON LINEARITE MONOTONES. PROBLEMES DE THOMAS-FERMI. EXISTENCE ET CONTROLE DE L'EQUILIBRE D'UN PLASMA EN PRESENCE D'UN DIAPHRAGME. EQUATIONS DE CHAMPS SCALAIRES NON LINEAIRES DANS R**(2)
Download or read book CONTRIBUTION OF THE STUDY OF NON LINEAR PARTIAL DIFFERENTIAL EQUATIONS ARISING FROM MATHEMATICAL PHYSICS written by Frank Merle and published by . This book was released on 1987 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: UNE 1ERE PARTIE EST CONSACREE A L'EQUATION DE SCHROEDINGER. ON ETUDIE LA CONTINUITE DU PHENOMENE D'EXPLOSION PAR RAPPORT AUX DONNEES INITIALES ET PAR RAPPORT ASUX NONLINEARITES. ENSUITE, ON ETUDIE CERTAINS PHENOMENES SE PRODUISANT A L'EXPLOSION, EN PARTICULIER L'EXISTENCE DE LIMITE A L'EXPLOSION DANS DES ESPACES FONCTIONNELS ADEQUATS. PAR AILLEURS, NOUS DEMONTRONS L'EXISTENCE D'ETATS STATIONNAIRES POUR UN MODELE DE CAVITEES OPTIQUES FAISANT INTERVENIR L'EQUATION DE SCHROEDINGER. DANS UNE 2EME PARTIE, ON ETUDIE L'EXISTENCE D'ETATS STATIONNAIRES POUR L'EQUATION DE DIRAC NON LINEAIRE ET UN SCHEMA NUMERIQUE POUR LES EQUATIONS D'EULER
Download or read book Contribution l tude des r gimes complexes dans des quations diff rentielles non lin aires written by Nicolas Moreau and published by . This book was released on 1971 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contributions a l etude des systemes d equations aux derivees partielles written by Chantal Moussy and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contribution l tude des solutions quasi p riodiques de certaines quations diff rentielles non lin aires written by Bernard Michel and published by . This book was released on 1962 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contribution l tude des quations aux d riv es partielles retard et de type neutre written by Mostafa Laklach and published by . This book was released on 2001 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail aborde la théorie des équations aux dérivées partielles à retard et des équations aux dérivées partielles de type neutre. On rencontre les équations aux dérivées partielles à retard dans de très nombreux domaines : physique, dynamique de populations, biologie, contrôle optimal, etc. D'une manière générale, les retards apparaissent à cause du temps nécessaire pour que le système réponde à une certaine évolution ou parce qu'un certain seuil doit être atteint avant que le système ne soit activé. Les équations à retard discret sont définies à partir de distributions de Dirac en des points de la demi-droite négative. Les équations aux dérivées partielles de type neutre font intervenir le produit de composition d'opérateurs de derivation en temps et espace, et de mesures à support sur la demi-droite temporelle négative. Ces dernières équations trouvent leur motivation dans l'apparition récente de modèles de circuits électriques constitués d'une grande quantité d'oscillateurs. C'est un exemple classique, dans la théorie des équations différentielles, qu'un circuit électrique non linéaire peut être réduit à une équation de type neutre. L'étude de ce problème a été initiée, ces dernières années, par j.Wu et ses collaborateurs. Il est bien connu que la méthode des semi-groupes permet de traiter une très large classe d'équations aux dérivées partielles à retard et de type neutre. Néanmoins, il existe des situations ou les opérateurs qui interviennent dans ces équations sont à domaine non dense et par conséquent, n'engendrent pas de semi-groupes. La méthode que nous avons utilisée dans cette thèse nous a permis de surmonter cette difficulté. Les principaux résultats obtenus dans ce domaine sont : des résultats d'existence locale et globale, la propriété du semi-groupe et son générateur infinitésimal, la décomposition spectrale de l'espace d'état en somme directe de sous-espaces invariants par le semi-groupe linéaire, des résultats d'existence de solutions bornées, périodiques et presque-periodiques, et l'existence d'un semi-groupe non linéaire par la formule exponentielle de Crandall-Liggett. Nous avons aussi démontré le théorème de bifurcation de Hopf locale pour les équations aux dérivées partielles à retard, ce qui correspond à un résultat d'existence de solutions périodiques.
Download or read book Dynamique Non lin aire Et Le Chaos written by and published by . This book was released on 1993 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The General Theory of Homogenization written by Luc Tartar and published by Springer Science & Business Media. This book was released on 2009-12-03 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Homogenization is not about periodicity, or Gamma-convergence, but about understanding which effective equations to use at macroscopic level, knowing which partial differential equations govern mesoscopic levels, without using probabilities (which destroy physical reality); instead, one uses various topologies of weak type, the G-convergence of Sergio Spagnolo, the H-convergence of François Murat and the author, and some responsible for the appearance of nonlocal effects, which many theories in continuum mechanics or physics guessed wrongly. For a better understanding of 20th century science, new mathematical tools must be introduced, like the author’s H-measures, variants by Patrick Gérard, and others yet to be discovered.
Download or read book Optimization Optimal Control and Partial Differential Equations written by Viorel Barbu and published by Springer Science & Business Media. This book was released on 1992 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Variational methods in mechanics and physical models.- Fluid flows in dielectric porous media.- The impact of a jet with two fluids on a porous wall.- Critical point methods in nonlinear eigenvalue problems with discontinuities.- Maximum principles for elliptic systems.- Exponential dichotomy of evolution operators in Banach spaces.- Asymptotic properties of solutions to evolution equations.- On some nonlinear elastic waves biperiodical or almost periodical in mechanics and extensions hyperbolic nonlinear partial differential equations.- The controllability of infinite dimensional and distributed parameter systems.- Singularities in boundary value problems and exact controllability of hyperbolic systems.- Exact controllability of a shallow shell model.- Inverse problem: Identification of a melting front in the 2D case.- Micro-local approach to the control for the plates equation.- Bounded solutions for controlled hyperbolic systems.- Controllability and turbulence.- The H? control problem.- The H? boundary control with state feedback; the hyperbolic case.- Remarks on the theory of robust control.- The dynamic programming method.- Optimality and characteristics of Hamilton-Jacobi-Bellman equations.- Verification theorems of dynamic programming type in optimal control.- Isaacs' equations for value-functions of differential games.- Optimal control for robot manipulators.- Control theory and environmental problems: Slow fast models for management of renewable ressources.- On the Riccati equations of stochastic control.- Optimal control of nonlinear partial differential equations.- A boundary Pontryagin's principle for the optimal control of state-constrained elliptic systems.- Controllability properties for elliptic systems, the fictitious domain method and optimal shape design problems.- Optimal control for elliptic equation and applications.- Inverse problems for variational inequalities.- The variation of the drag with respect to the domain in Navier-Stokes flow, .- Mathematical programming and nonsmooth optimization.- Scalar minimax properties in vectorial optimization.- Least-norm regularization for weak two-level optimization problems.- Continuity of the value function with respect to the set of constraints.- On integral inequalities involving logconcave functions.- Numerical solution of free boundary problems in solids mechanics.- Authors' index
Download or read book Physics on Manifolds written by M. Flato and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 365 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the proceedings of the Colloquium "Analysis, Manifolds and Physics" organized in honour of Yvonne Choquet-Bruhat by her friends, collaborators and former students, on June 3, 4 and 5, 1992 in Paris. Its title accurately reflects the domains to which Yvonne Choquet-Bruhat has made essential contributions. Since the rise of General Relativity, the geometry of Manifolds has become a non-trivial part of space-time physics. At the same time, Functional Analysis has been of enormous importance in Quantum Mechanics, and Quantum Field Theory. Its role becomes decisive when one considers the global behaviour of solutions of differential systems on manifolds. In this sense, General Relativity is an exceptional theory in which the solutions of a highly non-linear system of partial differential equations define by themselves the very manifold on which they are supposed to exist. This is why a solution of Einstein's equations cannot be physically interpreted before its global behaviour is known, taking into account the entire hypothetical underlying manifold. In her youth, Yvonne Choquet-Bruhat contributed in a spectacular way to this domain stretching between physics and mathematics, when she gave the proof of the existence of solutions to Einstein's equations on differential manifolds of a quite general type. The methods she created have been worked out by the French school of mathematics, principally by Jean Leray. Her first proof of the local existence and uniqueness of solutions of Einstein's equations inspired Jean Leray's theory of general hyperbolic systems.
Download or read book The Language of Physics written by Elizabeth Garber and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work is the first explicit examination of the key role that mathematics has played in the development of theoretical physics and will undoubtedly challenge the more conventional accounts of its historical development. Although mathematics has long been regarded as the "language" of physics, the connections between these independent disciplines have been far more complex and intimate than previous narratives have shown. The author convincingly demonstrates that practices, methods, and language shaped the development of the field, and are a key to understanding the mergence of the modern academic discipline. Mathematicians and physicists, as well as historians of both disciplines, will find this provocative work of great interest.
Download or read book Combinatorial Enumeration written by Ian P. Goulden and published by Courier Corporation. This book was released on 2004-06-23 with total page 609 pages. Available in PDF, EPUB and Kindle. Book excerpt: This graduate-level text presents mathematical theory and problem-solving techniques associated with enumeration problems. Subjects include the combinatorics of the ordinary generating function and the exponential generating function, the combinatorics of sequences, and the combinatorics of paths. The text is complemented by approximately 350 exercises with full solutions. 1983 edition. Foreword by Gian-Carlo Rota. References. Index.
Download or read book Fields Medallists Lectures written by Michael Atiyah and published by World Scientific. This book was released on 1997-10-13 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although the Fields Medal does not have the same public recognition as the Nobel Prizes, they share a similar intellectual standing. It is restricted to one field - that of mathematics - and an age limit of 40 has become an accepted tradition. Mathematics has in the main been interpreted as pure mathematics, and this is not so unreasonable since major contributions in some applied areas can be (and have been) recognized with Nobel Prizes. The restriction to 40 years is of marginal significance, since most mathematicians have made their mark long before this age.A list of Fields Medallists and their contributions provides a bird's eye view of mathematics over the past 60 years. It highlights the areas in which, at various times, greatest progress has been made. This volume does not pretend to be comprehensive, nor is it a historical document. On the other hand, it presents contributions from 22 Fields Medallists and so provides a highly interesting and varied picture.The contributions themselves represent the choice of the individual Medallists. In some cases the articles relate directly to the work for which the Fields Medals were awarded. In other cases new articles have been produced which relate to more current interests of the Medallists. This indicates that while Fields Medallists must be under 40 at the time of the award, their mathematical development goes well past this age. In fact the age limit of 40 was chosen so that young mathematicians would be encouraged in their future work.The Fields Medallists' Lectures is now available on CD-ROM. Sections can be accessed at the touch of a button, and similar topics grouped together using advanced keyword searches.
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1993-07 with total page 1484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Models of Neural Networks written by Gerasimos G. Rigatos and published by Springer. This book was released on 2014-08-27 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a complete study on neural structures exhibiting nonlinear and stochastic dynamics, elaborating on neural dynamics by introducing advanced models of neural networks. It overviews the main findings in the modelling of neural dynamics in terms of electrical circuits and examines their stability properties with the use of dynamical systems theory. It is suitable for researchers and postgraduate students engaged with neural networks and dynamical systems theory.
Download or read book An Introductory Dictionary of Lacanian Psychoanalysis written by Dylan Evans and published by Routledge. This book was released on 2006-06-19 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: Jacques Lacan's thinking revolutionised the theory and practice of psychoanalysis and had a major impact in fields as diverse as film studies, literary criticism, feminist theory and philosophy. Yet his writings are notorious for their complexity and idiosyncratic style. Emphasising the clinical basis of Lacan's work, An Introductory Dictionary of Lacanian Psychoanalysis is an ideal companion to his ideas for readers in every discipline where his influence is felt. The Dictionary features: * over 200 entries, explaining Lacan's own terminology and his use of common psychoanalytic expressions * details of the historical and institutional context of Lacan's work * reference to the origins of major concepts in the work of Freud, Saussure, Hegel and other key thinkers * a chronology of Lacan's life and works.
Download or read book General Orthogonal Polynomials written by Herbert Stahl and published by Cambridge University Press. This book was released on 1992-04-24 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: An encyclopedic presentation of general orthogonal polynomials, placing emphasis on asymptotic behaviour and zero distribution.
