Théorèmes numériques d'existence de solutions périodiques et presque périodiques d'équations différentielles autonomes et périodiques PDF Download

Author: Elaine Thoulouze-Pratt
Publisher:
ISBN:
Category :
Languages : fr
Pages : 12

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Author: Louis Sauvage
Publisher:
ISBN:
Category : Differential equations, Linear
Languages : fr
Pages : 196

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Author: Léon Derwidué
Publisher:
ISBN:
Category :
Languages : fr
Pages : 6

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Author: Medhat el- Zanfaly (auteur d'une thèse de sciences.)
Publisher:
ISBN:
Category :
Languages : fr
Pages : 86

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Author: Philippe Cieutat
Publisher:
ISBN:
Category :
Languages : fr
Pages : 133

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Author: Amina Chabi
Publisher:
ISBN:
Category :
Languages : fr
Pages : 68

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LES RESULTATS PRESENTES DANS CETTE THESE FONT L'OBJET DE TROIS PARTIES INDEPENDANTES. LA 1ERE CONCERNANT DES PROBLEMES ELLIPTIQUES OU PARABOLIQUES ET LES 2 AUTRES CONSACRES A UNE EQUATION DES ONDES AVEC DISSIPATION NON LINEAIRE. 1ERE PARTIE: ON ETABLIT UN THEOREME DE VALEURS INTERMEDIAIRES POUR LES FONCTIONS W**(1,P) QUEL QUE SOIT P, CE QUI NOUS PERMET D'EN DEDUIRE LES CONDITIONS NECESSAIRES ET SUFFISANTES D'EXISTENCE DE SOLUTIONS MULTIPLES POUR DES PROBLEMES ELLIPTIQUES SEMI-LINEAIRES DE TYPE MONOTONE AVEC CONDITIONS AUX LIMITES DE NEUMANN, AINSI QUE LES RESULTATS DU MEME TYPE POUR LES SOLUTIONS PERIODIQUES EN DES PROBLEMES PARABOLIQUES CORRESPONDANTS. 2EME PARTIE: ON DEMONTRE QUE L'EQUATION DES ONDES NON LINEAIRE ADMET UNE SEULE SOLUTION PRESQUE-PERIODIQUE DANS L'ENSEMBLE DES SOLUTIONS FAIBLES VERIFISANT LA CONDITION SUPPLEMENTAIRE U::(T) EST CONTINUE EN (T,X). 3EME PARTIE: ON ETUDIE LE COMPORTEMENT ASYMPTOTIQUE DES SOLUTIONS DE L'EQUATION DES ONDES AVEC DISSIPATION NON LINEAIRE OU LE TERME DISSIPATIF G EST UNE FONCTION CONTINUE CROISSANTE. EN REPRENANT LES NOUVELLES TECHNIQUES DE COMPARAISON DES SOLUTIONS DES EQUATIONS DIFFERENTIELLES INTRODUITES PAR A, H ET Z, ON OBTIENT POUR DES FONCTIONS G A CROISSANCE POLYNOMIALES DES ESTIMATIONS FINIES SUR LA CONVERGENCE VERS 0 DE L'ENERGIE DES SOLUTIONS: DECROISSANCE EN T**(-)ALPHA OU EXPONENTIELLE, CECI DANS LE CAS AUTONOME. DANS LE CAS NON AUTONOME, ON MONTRE QUE L'ENERGIE DE LA DIFFERENCE DE DEUX SOLUTIONS EST A DECROISSANCE EXPONENTIELLE

Author: HAFEDH.. ATEB
Publisher:
ISBN:
Category :
Languages : fr
Pages : 88

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ON CHERCHE DES CONDITIONS SUFFISANTES (ET PARFOIS NECESSAIRES ET SUFFISANTES), D'EXISTENCE DE SOLUTIONS PERIODIQUES U(U(0)=U(P)), D'EQUATIONS DIFFERENTIELLES D'ORDRE 1, DU TYPE: (E):FU'+H(,U)=0, POUR LES CAS SUIVANTS: 1) U'(T)+F(U(T))=G(T) POUR TOUT T APPARTIENT A (0,P) ET U APPARTIENT A C**(1)((0,P)); 2) (T::(0)-T)U'(T)+F(U(T))=G(T) OU T::(0) APPARTIENT A )0,P( ET U APPARTIENT A C**(1)((0,P)(T::(0))) INTER L**(INFINI)((0,P)), OU U APPARTIENT A C**(1)((0,P)(T::(0))) INTER L**(2)((0,P)); 3) F(T)U'(T)+H(T,U(T))=0, AVEC F APPARTIENT A C**(0)(I), F S'ANNULE SUR I ET U APPARTIENT A C**(1)(I*) INTER L**(INFINI)(I) OU U APPARTIENT A C**(1)(I*) INTER L**(2)(I), EN NOTANT I=(0,P) ET I*=(T APPARTIENT A I/F(T) NON=0)

Author: Robert Faure
Publisher:
ISBN:
Category :
Languages : fr
Pages : 28

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Author: P. Petitjean
Publisher: Springer Science & Business Media
ISBN: 9401125945
Category : Science
Languages : en
Pages : 419

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SCIENCE AND EMPIRES: FROM THE INTERNATIONAL COLLOQUIUM TO THE BOOK Patrick PETITJEAN, Catherine JAMI and Anne Marie MOULIN The International Colloquium "Science and Empires - Historical Studies about Scientific De velopment and European Expansion" is the product of an International Colloquium, "Sciences and Empires - A Comparative History of Scien tific Exchanges: European Expansion and Scientific Development in Asian, African, American and Oceanian Countries". Organized by the REHSEIS group (Research on Epistemology and History of Exact Sciences and Scientific Institutions) of CNRS (National Center for Scientific Research), the colloquium was held from 3 to 6 April 1990 in the UNESCO building in Paris. This colloquium was an idea of Professor Roshdi Rashed who initiated this field of studies in France some years ago, and proposed "Sciences and Empires" as one of the main research programmes for the The project to organize such a colloquium was a bit REHSEIS group. of a gamble. Its subject, reflected in the title "Sciences and Empires", is not a currently-accepted sub-discipline of the history of science; rather, it refers to a set of questions which found autonomy only recently. The terminology was strongly debated by the participants and, as is frequently suggested in this book, awaits fuller clarification.

Author: Yoshiyuki Hino
Publisher: Springer
ISBN: 3540473882
Category : Mathematics
Languages : en
Pages : 326

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In the theory of functional differential equations with infinite delay, there are several ways to choose the space of initial functions (phase space); and diverse (duplicated) theories arise, according to the choice of phase space. To unify the theories, an axiomatic approach has been taken since the 1960's. This book is intended as a guide for the axiomatic approach to the theory of equations with infinite delay and a culmination of the results obtained in this way. It can also be used as a textbook for a graduate course. The prerequisite knowledge is foundations of analysis including linear algebra and functional analysis. It is hoped that the book will prepare students for further study of this area, and that will serve as a ready reference to the researchers in applied analysis and engineering sciences.