Séminaires : Séminaire d'Algèbre

Equipe(s) : gr,
Responsables :J. Alev, D. Hernandez, B. Keller, Th. Levasseur, et S. Morier-Genoud.
Email des responsables : Jacques Alev <jacques.alev@univ-reims.fr>, David Hernandez <david.hernandez@imj-prg.fr>, Bernhard Keller <bernhard.keller@imj-prg.fr>, Thierry Levasseur <Thierry.Levasseur@univ-brest.fr>, Sophie Morier-Genoud <sophie.morier-genoud@imj-prg.fr>
Salle : Zoom ou hybride selon les orateurs. Info sur https://researchseminars.org/seminar/paris-algebra-seminar
Adresse :Zoom ou IHP Salle 01

Le séminaire est prévu en présence à l'IHP et à distance. Pour les liens et mots de passe, merci de contacter l'un des organisateurs ou de souscrire à la liste de diffusion https://listes.math.cnrs.fr/wws/info/paris-algebra-seminar. L'information nécessaire sera envoyée par courrier électronique peu avant chaque exposé. Les notes et transparents sont disponibles ici.


Since March 23, 2020, the seminar has been taking place remotely. For the links and passwords, please contact one of the organizers or

subscribe to the mailing list at https://listes.math.cnrs.fr/wws/info/paris-algebra-seminar. The connexion information will be emailed shortly before each talk. Slides and notes are available here.


Orateur(s) Ehud MEIR - IHES,
Titre On module categories over graded fusion categories
Horaire14:30 à 15:30
RésumeFusion categories arise in several areas of mathematics- such as the representation theory of Hopf algebras and topological quantum field theory. They are tensor categories which satisfy certain rigidity assumptions- they are semisimple, have a finite number of simple objects, and they have duals. A general classification of fusion categories seems to be out of reach at the moment. However, Etingof Nikshych and Ostrik have classified all fusion categories which are extensions of a given fusion category by a given finite group $G$, by cohomological machinery (these are categories which are naturally graded by the group $G$) In this talk I will describe a joint work with Evgeny Musicantov, about the classification of module categories (which, in this setting, are the categorical analogues of modules over a ring) over these fusion categories. I will explain all the fundamental notions, their relevance for the theory of Hopf algebras, and the role that the cohomological machinery plays in the classification.
SalleZoom ou hybride selon les orateurs. Info sur https://researchseminars.org/seminar/paris-algebra-seminar
AdresseZoom ou IHP Salle 01