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Une fonction discontinue peut-elle être solution d'une équation différentielle? Comment définir rigoureusement la masse de Dirac (une "fonction" d'intégrale un, nulle partout sauf en un point) et ses dérivées? Peut-on définir une notion de "dérivée d'ordre fractionnaire"? Cette initiation aux distributions répond à ces questions - et à bien d'autres.
Syllabus
L'équation de Hopf
Fonctions test
Définition des distributions
Dérivation des distributions
Semaine 3 :
Autres opérations sur les distributions
Formule des sauts en dimension 1
Semaine 4 :
Formule des sauts en dimension >1 et applications
Distributions à support compact
Convolution des distributions par des fonctions régulières
Semaine 5 :
Régularisation des distributions
Convolution des distributions
Distributions tempérées
Semaine 6 :
Transformation de Fourier sur la classe de Schwartz
Transformation de Fourier pour les distributions tempérées
Introduction à l'étude des EDP
Exemples de solutions élémentaires
Détermination de quelques solutions élémentaires
Semaine 8 :
Fonctions harmoniques
Equation de Poisson
Semaine 9 :
Problème de Cauchy au sens des distributions
Exemples d'EDP d'évolution d'ordre 1
Un exemple d'EDP d'évolution d'ordre 2
Instructors
Prof. François Golse
Professeur à l'Ecole polytechnique
Département de mathématiques
Prof. Yvan Martel
Professeur à l'Ecole polytechnique
Département de mathématiques
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École polytechnique (also known by the nickname " X ") is a French public institution of higher education and research, located in Palaiseau near Paris. It is one of the French Grandes écoles, and is renowned for its four-year undergraduate Ingénieur Polytechnicien degree in science and engineering. Students are usually admitted after two years of selective university-level preparation in mathematics and physics or after a Bachelor of Sciences (Licence in French educative system).
Polytechnique was established in 1794 by the mathematician Gaspard Monge during the French Revolution, and became a military academy under Napoleon I in 1804. Today, the institution still runs under the supervision of the French ministry of Defence. Initially located in the Latin Quarter of central Paris, the establishment was moved in 1976 to Palaiseau on the Saclay Plateau, southwest of Paris.
Polytechnique is a founding member of ParisTech, a grouping of leading Paris-area engineering colleges established in 2007. In 2014 it became a founding member as well as the head of multidisciplinary technology and innovation institute, the confederal "University of Paris in Saclay". Among its alumni are three Nobel prize winners, one Fields Medalist, three Presidents of France and many CEOs of French and international companies.
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Coursera is a digital company offering massive open online course founded by computer teachers Andrew Ng and Daphne Koller Stanford University, located in Mountain View, California.
Coursera works with top universities and organizations to make some of their courses available online, and offers courses in many subjects, including: physics, engineering, humanities, medicine, biology, social sciences, mathematics, business, computer science, digital marketing, data science, and other subjects.
