Download or read book Contributions L tude Des Probl mes Elliptiques Dans Des Domaines Non born s written by Boyan Sirakov and published by . This book was released on 2000 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse est consacrée à l'étude d'une équation elliptique semi-linéaire.
Download or read book ETUDE DE PROPRIETES QUALITATIVES DE CERTAINES EQUATIONS AUX DERIVEES PARTIELLES ELLIPTIQUES NON LINEAIRES written by JEROME.. BUSCA and published by . This book was released on 1998 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: LES TRAVAUX PRESENTES DANS CETTE THESE ONT POUR OBJET L'ETUDE DE PROPRIETES QUALITATIVES DE CERTAINES EQUATIONS AUX DERIVEES PARTIELLES ELLIPTIQUES NON LINEAIRES. ILS S'ARTICULENT AUTOUR DE DEUX THEMES PRINCIPAUX : LA RECHERCHE DE PROPRIETES DE SYMETRIE ET DE MONOTONIE DES SOLUTIONS DE PROBLEMES DE DIRICHLET ASSOCIES A DE TELLES EQUATIONS, ET L'ETUDE DE LA SYMETRIE DES SOLUTIONS ET DU DOMAINE POUR LES PROBLEMES SUR-DETERMINES DE TYPE SERRIN CORRESPONDANTS, DANS LE CADRE DES DOMAINES NON BORNES. LE CHAPITRE 2 ABORDE AINSI LE DEUXIEME THEME DANS LE CAS DES CYLINDRES INFINIS, LES CHAPITRES 3 ET 4 LES DEUX THEMES DANS LE CAS DES DOMAINES EXTERIEURS ET LE CHAPITRE 5 ETUDIE LE PREMIER POINT DANS LES CADRE DES CONES. DES OUTILS SPECIFIQUES ONT ETE DEVELOPPES DANS CHACUNE DE CES GEOMETRIES AFIN D'ADAPTER LA METHODE DE DEPLACEMENT D'HYPERPLANS (MOVING PLANES), QUI EST UN OUTIL CLASSIQUE EN DOMAINES BORNES. EN RELATION AVEC CES TRAVAUX, LE CHAPITRE 6 ABORDE L'ETUDE D'UNE QUESTION LIEE A LA STABILITE POUR LES PROBLEMES SUR-DETERMINES DE TYPE SERRIN, ET LES CHAPITRES 7 ET 8 L'EXISTENCE ET L'UNICITE DANS LES EQUATIONS DE HAMILTON-JACOBI-BELLMAN, POUR UNE CLASSE GENERALE D'OPERATEURS DIFFERENTIELS ELLIPTIQUES. EN MARGE DES QUESTIONS PRECEDENTES, LE CHAPITRE 9 PRESENTE UNE CONTRIBUTION A L'ETUDE DU PROBLEME DE NEUMANN-KELVIN DE L'HYDRODYNAMIQUE NAVALE.
Download or read book Contributions a l etude des problemes aux limites elliptiques non lineaires written by Henri Berestycki and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: PROBLEMES DU TYPE BIFURCATION: LE NOMBRE DE SOLUTIONS DE CERTAINS PROBLEMES SEMI-LINEAIRRES ELLIPTIQUES; CERTAINS PROBLEMES DE STURM-LIOUVILLE NON LINEAIRES. PROBLEMES DU TYPE FRONTIERE LIBRE. EQUATIONS DE CHAMPS SCALAIRES NON LINEAIRES: PROBLEMES SEMILINEAIRES ELLIPTIQUES DANS R**(N), UNE METHODE LOCALE POUR L'EXISTENCE DE SOLUTIONS POSITIVES, UNE METHODE D'EQUATION DIFFERENTIELLE ORDINAIRE, EXISTENCE D'UN ETAT FONDAMENTAL, EXISTENCE D'UNE INFINITE D'ETATS LIES
Download or read book ELLIPTIC PROBLEMS IN DOMAINS WITH CUSPIDAL POINTS written by Kheira Belahdji and published by . This book was released on 1996 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL A POUR BUT PRINCIPAL L'ETUDE DE PROBLEMES AUX LIMITES ELLIPTIQUES DANS DES DOMAINES NON REGULIERS, PRESENTANT EN PARTICULIER DES POINTS DE REBROUSSEMENT. ON S'EST INTERESSE PLUS PRECISEMENT A LA REGULARITE L#P DES SOLUTIONS. DANS CE CONTEXTE, IL EST ETABLI LA REGULARITE W#2#,#P(RESP W#3#,#P) DE LA SOLUTION DU PROBLEME DE DIRICHLET POUR L'EQUATION DE LAPLACE (RESP DE BILAPLACIEN) DANS UN OUVERT DE IR#3 DE CLASSE C#2 EN DEHORS D'UN NOMBRE FINI DE POINTS CUSPIDES, POUR UNE DONNEE L#P(RESP W#-#1#,#P). ON A EGALEMENT ETUDIE LE PROBLEME DE DIRICHLET POUR L'EQUATION DE LAPLACE DANS UN DOMAINE DE IR#3 ENCORE MOINS REGULIER, CONTENANT A LA FOIS UN POINT CUSPIDE A L'ORIGINE ET UNE ARETE. ON DEMONTRE QUE POUR UNE DONNEE L#P, P 2, LA SOLUTION SE DECOMPOSE EN UNE PARTIE REGULIERE APPARTENANT A W#2#,#P () ET UNE PARTIE SINGULIERE DANS H#1() A LAQUELLE ON DONNE UNE FORME EXPLICITE. ON RESOUT AUSSI LE MEME PROBLEME DANS UN DOMAINE DE IR#3 PRESENTANT DES ARETES CUSPIDES. ON TERMINE CE TRAVAIL PAR UNE EXTENSION DES RESULTATS PREETABLIS AU CAS D'UN OUVERT DE IR#2 DE CLASSE C#2 SAUF EN UN CERTAIN NOMBRE FINI DE POINTS CUSPIDES. ON MONTRE EN PARTICULIER UN RESULTAT DE REGULARITE POUR LE SYSTEME DE STOKES
Download or read book tude de quelques probl mes elliptiques et paraboliques quasi lin aires avec singularit s written by Paul Sauvy and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse s'inscrit dans le domaine mathématique de l'analyse des équations aux dérivées partielles non-linéaires. Plus précisément, nous avons fait ici l'étude de problèmes quasi-linéaires singuliers. Le terme "singulier" fait référence à l'intervention d'une non-linéarité qui explose au bord du domaine où 'équation est posée. La présence d'une telle singularité entraîne un manque de régularité et donc de compacité des solutions qui ne nous permet pas d'appliquer directement les méthodes classiques de l'analyse non-linéaire pour démontrer l'existence de solutions et discuter des propriétés de régularité et de comportement asymptotique de ces solutions. Pour contourner cette difficulté, nous sommes amenés à établir des estimations a priori très fines au voisinage du bord du domaine en combinant diverses méthodes : méthodes de monotonie (reliée au principe du maximum), méthodes variationnelles, argument de convexité, méthodes de point fixe et semi-discrétisation en temps. A travers, l'étude de trois problèmes-modèle faisant intervenir l'opérateur p-Laplacien, nous avons montré comment ces différentes méthodes pouvaient être mises en œuvre. Les résultats que nous avons obtenus sont décrits dans les trois chapitres de cette thèse : Dans le Chapitre I, nous avons étudié un problème d'absorption elliptique singulier. En utilisant des méthodes de sur- et sous solutions et des méthodes variationnelles, nous établissons des résultats d'existence de solutions. Par des méthodes de comparaison locale, nous démontrons également la propriété de support compact de ces solutions, pour de fortes singularités. Dans le Chapitre II, nous étudions le cas d'un système d'équations quasi-linéaires singulières. Par des arguments de point fixe et de monotonie, nous démontrons deux résultats généraux d'existence de solutions. Dans un deuxième temps, nous faisons une analyse plus détaillée de systèmes du type Gierer-Meinhardt modélisant des phénomènes biologiques. Des résultats d'unicité ainsi que des estimations précises sur le comportement des solutions sont alors obtenus. Dans le Chapitre III, nous faisons l'étude d'un problème d'absorption, parabolique singulier. Nous établissons par une méthode de semi-discrétisation en temps des résultats d'existence de solutions. Grâce à des inégalités d'énergie, nous démontrons également l'extinction en temps fini de ces solutions.
Download or read book African Doctorates in Mathematics written by and published by Lulu.com. This book was released on 2007 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents a catalogue of over 2000 doctoral theses by Africans in all fields of mathematics, including applied mathematics, mathematics education and history of mathematics. The introduction contains information about distribution by country, institutions, period, and by gender, about mathematical density, and mobility of mathematicians. Several appendices are included (female doctorate holders, doctorates in mathematics education, doctorates awarded by African universities to non-Africans, doctoral theses by non-Africans about mathematics in Africa, activities of African mathematicians at the service of their communities). Paulus Gerdes compiled the information in his capacity of Chairman of the African Mathematical Union Commission for the History of Mathematics in Africa (AMUCHMA). The book contains a preface by Mohamed Hassan, President of the African Academy of Sciences (AAS) and Executive Director of the Academy of Sciences for the Developing World (TWAS). (383 pp.)
Download or read book Spectral Geometry written by Pierre H. Berard and published by Springer. This book was released on 2006-11-14 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Methods for Nonlinear Variational Problems written by Roland Glowinski and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the mathematical background and reviews the techniques for solving problems, including those that require large computations such as transonic flows for compressible fluids and the Navier-Stokes equations for incompressible viscous fluids. Finite element approximations and non-linear relaxation, and nonlinear least square methods are all covered in detail, as are many applications. This volume is a classic in a long-awaited softcover re-edition.
Download or read book Singular and Degenerate Cauchy Problems written by and published by Academic Press. This book was released on 1977-01-13 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, we study theoretical and practical aspects of computing methods for mathematical modelling of nonlinear systems. A number of computing techniques are considered, such as methods of operator approximation with any given accuracy; operator interpolation techniques including a non-Lagrange interpolation; methods of system representation subject to constraints associated with concepts of causality, memory and stationarity; methods of system representation with an accuracy that is the best within a given class of models; methods of covariance matrix estimation;methods for low-rank matrix approximations; hybrid methods based on a combination of iterative procedures and best operator approximation; andmethods for information compression and filtering under condition that a filter model should satisfy restrictions associated with causality and different types of memory.As a result, the book represents a blend of new methods in general computational analysis,and specific, but also generic, techniques for study of systems theory ant its particularbranches, such as optimal filtering and information compression.- Best operator approximation,- Non-Lagrange interpolation,- Generic Karhunen-Loeve transform- Generalised low-rank matrix approximation- Optimal data compression- Optimal nonlinear filtering
Download or read book The Mathematical Writings of variste Galois written by Évariste Galois and published by European Mathematical Society. This book was released on 2011 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Before he died at the age of twenty, shot in a mysterious early-morning duel at the end of May 1832, Evariste Galois created mathematics that changed the direction of algebra. This book contains English translations of almost all the Galois material. The translations are presented alongside a new transcription of the original French and are enhanced by three levels of commentary. An introduction explains the context of Galois' work, the various publications in which it appears, and the vagaries of his manuscripts. Then there is a chapter in which the five mathematical articles published in his lifetime are reprinted. After that come the testamentary letter and the first memoir (in which Galois expounded on the ideas that led to Galois Theory), which are the most famous of the manuscripts. These are followed by the second memoir and other lesser known manuscripts. This book makes available to a wide mathematical and historical readership some of the most exciting mathematics of the first half of the nineteenth century, presented in its original form. The primary aim is to establish a text of what Galois wrote. The details of what he did, the proper evidence of his genius, deserve to be well understood and appreciated by mathematicians as well as historians of mathematics.
Download or read book On the Cauchy Problem written by Sigeru Mizohata and published by Academic Press. This book was released on 2014-05-10 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Notes and Reports in Mathematics in Science and Engineering, Volume 3: On the Cauchy Problem focuses on the processes, methodologies, and mathematical approaches to Cauchy problems. The publication first elaborates on evolution equations, Lax-Mizohata theorem, and Cauchy problems in Gevrey class. Discussions focus on fundamental proposition, proof of theorem 4, Gevrey property in t of solutions, basic facts on pseudo-differential, and proof of theorem 3. The book then takes a look at micro-local analysis in Gevrey class, including proof and consequences of theorem 1. The manuscript examines Schrödinger type equations, as well as general view-points on evolution equations. Numerical representations and analyses are provided in the explanation of these type of equations. The book is a valuable reference for mathematicians and researchers interested in the Cauchy problem.
Download or read book Random Polynomials written by A. T. Bharucha-Reid and published by Academic Press. This book was released on 2014-05-10 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: Probability and Mathematical Statistics: A Series of Monographs and Textbooks: Random Polynomials focuses on a comprehensive treatment of random algebraic, orthogonal, and trigonometric polynomials. The publication first offers information on the basic definitions and properties of random algebraic polynomials and random matrices. Discussions focus on Newton's formula for random algebraic polynomials, random characteristic polynomials, measurability of the zeros of a random algebraic polynomial, and random power series and random algebraic polynomials. The text then elaborates on the number and expected number of real zeros of random algebraic polynomials; number and expected number of real zeros of other random polynomials; and variance of the number of real zeros of random algebraic polynomials. Topics include the expected number of real zeros of random orthogonal polynomials and the number and expected number of real zeros of trigonometric polynomials. The book takes a look at convergence and limit theorems for random polynomials and distribution of the zeros of random algebraic polynomials, including limit theorems for random algebraic polynomials and random companion matrices and distribution of the zeros of random algebraic polynomials. The publication is a dependable reference for probabilists, statisticians, physicists, engineers, and economists.
Download or read book Stochastics Algebra and Analysis in Classical and Quantum Dynamics written by Sergio Albeverio and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: 'Et moi, "'f si j'avait su comment en revenir, One service mathematics has rendered the je n'y serais point aile':' human race. It has put common sense back Jules Verne where it belongs, 011 the topmost shelf next to the dusty canister labelled 'discarded non- The series is divergent; therefore we may be able to do something with it. Eric T. Bell o. Heaviside Mathematics is a tool for thought. A highly necessary tool in a world where both feedback and non Iinearities abound. Similarly, all kinds of parts of mathematics serve as tools for other parts and for other sciences. Applying a simple rewriting rule to the quote on the right above one finds such statements as: 'One service topology has rendered mathematical physics . . . '; 'One service logic has rendered com puter science . . . '; 'One service category theory has rendered mathematics . . . '. All arguably true. And all statements obtainable this way form part of the raison d'etre of this series_ This series, Mathematics and Its Applications, started in 1977. Now that over one hundred volumes have appeared it seems opportune to reexamine its scope. At the time I wrote ''Growing specialization and diversification have brought a host of monographs and textbooks on increasingly specialized topics. However, the 'tree' of knowledge of mathematics and related fields does not grow only by putting forth new branches.
Download or read book Hypocoercivity written by Cdric Villani and published by American Mathematical Soc.. This book was released on 2009-10-08 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: This memoir attempts at a systematic study of convergence to stationary state for certain classes of degenerate diffusive equations, taking the general form ${\frac{\partial f}{\partial t}}+ L f =0$. The question is whether and how one can overcome the degeneracy by exploiting commutators.
Download or read book Mean Field Games written by Yves Achdou and published by Springer Nature. This book was released on 2021-01-19 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides an introduction to the theory of Mean Field Games, suggested by J.-M. Lasry and P.-L. Lions in 2006 as a mean-field model for Nash equilibria in the strategic interaction of a large number of agents. Besides giving an accessible presentation of the main features of mean-field game theory, the volume offers an overview of recent developments which explore several important directions: from partial differential equations to stochastic analysis, from the calculus of variations to modeling and aspects related to numerical methods. Arising from the CIME Summer School "Mean Field Games" held in Cetraro in 2019, this book collects together lecture notes prepared by Y. Achdou (with M. Laurière), P. Cardaliaguet, F. Delarue, A. Porretta and F. Santambrogio. These notes will be valuable for researchers and advanced graduate students who wish to approach this theory and explore its connections with several different fields in mathematics.
Download or read book Lectures on Nonlinear Hyperbolic Differential Equations written by Lars Hörmander and published by Springer Science & Business Media. This book was released on 1997-07-17 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this introductory textbook, a revised and extended version of well-known lectures by L. Hörmander from 1986, four chapters are devoted to weak solutions of systems of conservation laws. Apart from that the book only studies classical solutions. Two chapters concern the existence of global solutions or estimates of the lifespan for solutions of nonlinear perturbations of the wave or Klein-Gordon equation with small initial data. Four chapters are devoted to microanalysis of the singularities of the solutions. This part assumes some familiarity with pseudodifferential operators which are standard in the theory of linear differential operators, but the extension to the more exotic classes of opertors needed in the nonlinear theory is presented in complete detail.
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.
