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  • 5 minutes Lebesgue
    Sep 26, 2017

    Les vidéos des exposés seront mises en ligne quelques jours après l'exposé. Vidéothèque

    Prochain exposé :

    26-09-2017Roger Lewandowski
    N raisons d'adhérer à la SMAI où N tend vers l'infini

    Lieu

    Rennes

    Exposés à venir:

    10-10-2017:  Présentation des Annales Henri Lebesgue

    17-10-2017:  Rémi Coulon

    07-11-2017:  Guy Casale

    21-11-2017:  Marine Fontaine

  • Conference - Geometric Analysis at Roscoff
    Oct 9, 2017 to Oct 13, 2017

    Roscoff, from October 9th to October 13th

    Organization board: Paul Baird, Gilles Carron, Ali Fardoun, Carl Tipler

    Scientific board: Gérard Besson (CNRS, Institut Fourier), Olivier Biquard (ENS Paris), Ahmad El Soufi (Univ. Tours)

    Geometric Analysis is the application and development of PDE tools and technics in Riemannian geometry, it is also a fundamental tool in mathematical physics. Recently, important conjectures has been solved: Poincaré's conjecture, Willmore's conjecture, Lawson's conjecture, Yau-Tian-Donaldson's conjecture and a lot of new tools has been introduced and developed : optimal transport, weak formulation of Ricci curvature, Geometric measure theory. This conference will be an opportunity for specialists from theses different areas to meet and exchange ideas, questions and knowledge.

  • Conference - Lebesgue PHD meeting 2017
    Oct 16, 2017 to Oct 18, 2017

    Rennes, from October 16th to October 18th

    Organization board: Grégory Boil, Valentin Doli, Caroline Robet, Jérôme Spielmann

    Scientific board: Solène Bulteau, Clément Rouffort, Nasab Yassine

    Depuis trois ans, le Centre Henri Lebesgue soutient les Rencontres doctorales Lebesgue, initiative des doctorants du Labex. Il s'agit de trois journées de conférences durant lesquelles la parole est donnée à des doctorants de tout horizon géographique et mathématique. L'objectif est ainsi de présenter un panel le plus large possible de la recherche mathématique actuelle telle qu'elle est vue et vécue par les doctorants, mais pas seulement... Lors de ces rencontres, trois chercheurs, appelés 'parrains' de l'évènement, sont invités à exposer et ainsi à partager leur expérience personnelle de la recherche d'aujourd'hui. Cette année, les rencontres sont parrainées par :

    Jean-Marc Bardet (SAMM, Université Paris 1);

    Jasmin Raissy (Institut mathématique de Toulouse, Université Paul Sabatier);

    Gabriel Rivière (Laboratoire Paul Painlevé, Université de Lille 1).

    Bien que principalement destinée aux doctorants, cette conférence se veut également accessible aux étudiants de M2 désireux d’avoir un aperçu des travaux auxquels une thèse en mathématiques peut mener. Pour les doctorants désireux d'exposer leurs travaux de recherche, il est également possible de déposer une proposition sur l'onglet 'Proposer un Exposé'. Dans un souci d'organisation, merci de vous inscrire à l'évènement même si vous proposez un exposé.

  • XVII Journées Louis Antoine
    Oct 19, 2017 to Oct 20, 2017

    Nombres et aléas

    Deux mini-cours de 3 heures

    Yann Bugeaud (Strasbourg): Sur l'écriture d'un nombre réel dans des bases différentes.

    et

    Ashkan Nikeghbali (Zürich):L'heuristique matrices aléatoires en théorie des nombres.

    et un exposé complémentaire

    Joackim Bernier (Université de Rennes 1) : Markoff, et approximation diophantienne.

    Voir le site des JLA

  • Complex dynamics and quasi-conformal geometry
    Oct 23, 2017 to Oct 25, 2017

    Our colleague Tan Lei passed away in April 2016. A conference will be held from 23/10/2017 to 25/10/2017 at the University of Angers to honour her memory.

    Scientific Committee

    Etienne Ghys (ENS Lyon)
    John Milnor (Stony Brook)
    Mitsuhiro Shishikura (Kyoto).

    Organizing Committee

    Mohammed El Amrani (Angers)
    Michel Granger(Angers)
    Jean-Jacques Loeb(Angers)
    Laurent Meersseman(Angers)
    Pascale Roesch(Toulouse).

    Provisional list of speakers

    Xavier Buff, Arnaud Cheritat, Nuria Fagella (to be confirmed), Cui Guizhen,Peter Haissinski, John Hamal Hubbard (to be confirmed), Carsten lunde Petersen, Kevin Pilgrim, Mary Rees, Pascale Roesh, Hans Henrik Rugh, Dylan Thurston, Mitsu Shishikura, Giulio Tiozzo.

    More information : page

    The registration process is already open.

  • School - Masterclass 2017
    Dec 19, 2017 to Dec 21, 2017

    QR-Code

    Angers, from December 19th to December 21st

    Organization board: Etienne Mann

    We organize a masterclass in Angers, from 19th to 21st of December, 2017. Lectures will be in the morning sessions. We will have two parallel sessions:

    • Etienne Mann : Introduction to algebraic stacks
      We will introduce the notion of fibered category, Grothendieck topology and stacks. We will illustrate these notions on simple examples.
    • Loic Chaumont: Application of the matrix-tree-theorem

    The organisation board will pay the housing and the lunch. The other meals are not payed by the organizers. For the travel expenses, we will do our best in the limit of our budget.

    Date limite d'inscription 15 novembre.

  • Workshop - Numerical methods for algebraic curves
    Feb 19, 2018 to Feb 23, 2018

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    Rennes, from February 19th to February 23rd

    Organization board: Xavier Caruso, David Lubicz, Christophe Ritzenthaler, Marie-Françoise Roy

    Scientific board: Xavier Caruso, David Lubicz, Christophe Ritzenthaler, Marie-Françoise Roy

    This workshop will bring together researchers in complex and real algebraic geometry and applied mathematics (physics and cryptography) to discuss numerical methods and open problems on algebraic curves. There will be a number of introductory talks to each of the following topics and invited lectures from specialists: - Theoretical physics/DPE - Computations with the Jacobian - Random real topology - Complexity of computing topology of real algebraic curves - p-adic methods and applications to cryptography

  • Conference - Maths and Business Days
    Apr 12, 2018 to Apr 13, 2018

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    Vannes, from April 12th to April 13th

    Organization board: Christophe Berthon, Eric Darrigrand, Emmanuel Frénod, Fabrice Mahé, Loïc Chaumont

Thematic Semester 2014 - Around moduli spaces

Moduli spaces are among the subjects with a longest history in algebraic geometry. Starting from the first ideas of Riemann to nowadays, the research in this field has always been a backbone for the entire discipline. Its amazing development has also motived many technical advances and discoveries. Still these days the relevant amount of researchers working on moduli theory witnesses a very active and vital field of research. The goal of the current semester of the CHL is to explore many different aspects of this field of research, during several conferences, schools and workshops, to be held in Rennes, Nantes, Angers and Brest.

Program

Master program

The universities of Nantes and Rennes propose a special Master program strengthened in algebra and geometry related to the topic of the thematic semester. More informations here.

Schools

Classical and p-adic Hodge theories

Rennes, from May 12th to May 23rd, 2014
Contact: C. Mourougane
Scientific board: X. Caruso, F. Charles, M. Gros, C. Mourougane

Derived categories (in partnership with GRIFGA)

Nantes, from June 23rd to June 27th, 2014
Contact: M. Bolognesi
Organisation board: M. Bolognesi, M. Bernadara, P. Stellari
Scientific board: C. Sorger, D. Orlov, B. Toen

Conferences

Moduli spaces of real and complex varieties

Angers, from June 2nd to June 6th, 2014
Contact: F. Mangolte
Organisation board: F. Mangolte, J.-P. Monnier, D. Naie
Scientific board: F. Catanese, V. Kharlamov

Effective moduli spaces and applications to cryptography

Rennes, from June 10th to June 13th, 2014
Contact: D. Lubicz
Organisation board: M. Bolognesi, D. Lubicz, C. Ritzenthaler

Real vector bundles

Brest, from July 7th to July 11th, 2014
Contact: J. Huisman
Scientific board: M. Atiyah, I. Biswas, C. Okonek, A. Parusinski

Loop spaces in geometry and topology

Nantes, Sept 1st to 5th 2014
Contact: H. Abbaspour
Organisation board: H. Abbaspour (Nantes), A. Oancea (Paris), N. Wahl (Copenhagen)

Workshops

Real geometry and singularities

Rennes, from March 26th to March 28th, 2014
Contact: G. Fichou
Organisation board: G. Fichou, R. Quarez
Scientific board: G. Comte, A. Parusinski

Moduli spaces of connexions

Rennes, from July 1st to July 3rd, 2014
Contact: F. Loray
Organisation board: F. Loray
Scientific board: P. Boalch, F. Loray, M.-H. Saito, C. Simpson

Partners

Irmar LMJL ENS Rennes LMBA LAREMA

Affiliation

ANR CNRS Rennes 1 Rennes 2 Nantes INSA Rennes INRIA ENSRennes UBO UBS Angers UBL