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  • New numerical schemes for extreme geophysical phenomena
    Sep 29, 2016 to Sep 30, 2016

    Final GeoNum Workshop

    New numerical schemes for extreme geophysical phenomena

    The GeoNum project aims at deriving high-order numerical methods to approximate nonlinear hyperbolic systems that arise when considering gravitational flows. The objectives are twofold. On the one hand, relevant models have to be carefully chosen in order to perform simulations of physical interest. Indeed, geophysical flows are generally modelled using Saint-Venant equations, which are not systematically well adapted to predict sophisticated shallow water flows. These models have to be extended to take into account important phenomena including turbulence, complex bathymetries or the sediments' impact on the topography's variation. On the other hand, the developments of new strategies to enforce highly accurate approximations required to simulate environmental flows are considered. Moreover, a particular attention must be paid on the robustness of the suggested algorithms. To address such an issue, classical schemes have to be extended into relevant high order approximations independently of both chosen topography and domain geometry. As a consequence, the resulting approaches are well adapted to perform real-life simulations.

    Lieu: Laboratoire de Mathématiques Jean Leray

    website of the conference

  • 5 minutes Lebesgue
    Sep 29, 2016

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

    Prochain exposé:

    29-09-2016:  Frédéric Hélein
    Le paysage actuel de l'édition scientifique


    Irmar, Salles 004-006, 09h00

    Exposés à venir:

    07-10-2016:  Thomas Wallez
    21-10-2016:  Joe Viola
    18-11-2016:  Guillem Cazasus
    01-12-2016:  Didier Robart

  • Journée d'information et de réflexion sur l'édition scientifique
    Sep 29, 2016

    Cette journée a pour objectif d'informer les mathématicien-ne-s rennais-es sur le paysage de l'édition scientifique mathématique actuel et ses évolutions en cours. Elle ambitionne également de stimuler des comportements vertueux des individus et des structures en matière de publication d'articles et d'utilisation des ressources documentaires.


    09:30-10:30 Frédéric Hélein, Le paysage actuel de l'édition scientifique
    10:30-11:30 Thierry Bouche, Présentation du Cedram et autres nouvelles initiatives
    11:30-12:30 Laurent Guillopé, La SMF comme maison d'édition
    12:30-14:00 Déjeuner
    14:00-15:00 Reinie Erné et Bas Edixhoven, La Fondation Compositio Mathematica
    15:00-16:00 Claude Sabbah, Un exemple de journal électronique, le Journal de l'Ecole Polytechnique
    16:00-16:30 Benoît Claudon, ÉPIGA : retour d'expérience sur son lancement


    Maryse Collin, Matthieu Romagny (organisateurs principaux), Xavier Caruso, Françoise Dal'Bo, Michel Gros, Frank Loray, Florian Méhats, Christophe Mourougane, Nicolas Raymond, San Vũ Ngọc


    Tous les exposés ont lieu dans la salle 004-006, au rez-de-chaussée de l'IRMAR.

  • Conference - Lebesgue PhD meeting 2016
    Oct 19, 2016 to Oct 21, 2016

    Angers, from October 19th to October 21st

    Organization board: Clément du Crest de Villeneuve, Clément Fromenteau, Guillaume Roux, Johan Leray

    Scientific board: Viet Anh Nguyen, Olivier Thom, Caroline Vernier

  • XV Journées Louis Antoine
    Nov 3, 2016 to Nov 4, 2016

    Théorie du Contrôle

    Deux mini-cours de 3 heures

    Franck Boyer (Université Paul Sabatier - Toulouse) : Contrôlabilité des systèmes paraboliques linéaires et de leurs discrétisations.


    Jean-Michel Coron (Université Pierre et Marie Curie) :Contrôle de systèmes et non linéarités.

    et un exposé complémentaire

    Néstor Fernàndez Vargas (Université de Rennes1) :Difféomorphismes, transitivité et densité.

    Voir le site des JLA

  • Conference - CAST - Contact and Symplectic Topology
    Jan 26, 2017 to Jan 28, 2017


    Nantes, from January 26th to January 28th

    Organization board: Baptiste Chantraine, Vincent Colin, Paolo Ghiggini

    Scientific board: Jean-François Barraud, Baptiste Chantraine, Kai Cieliebak, Tobias Ekholm

  • School - Flows and Limits in Kähler Geometry
    Apr 18, 2017 to Apr 22, 2017


    Nantes, from April 18th to April 22nd

    Organization board: Sébastien Boucksom, Yann Rollin, Carl Tipler

    Scientific board: Claudio Arezzo, Olivier Biquard, Paul Gauduchon, Michael Singer

    Kähler geometry is a very active research field, at the crossroads between algebraic and Riemannian geometry. Important breakthrough, that lead to solve the Yau-Tian-Donaldson conjecture in the Fano case, have been achieved recently. A spring school involving mini-lectures and talks around this thread of new ideas in Kähler geometry is organized at Nantes University. The goal of the school is to develop certain technical skills, useful to address a variety of important questions in algebraic geometry and global analysis on manifolds, aimed for PhD students and young researchers. Geometric flows, like the Kähler-Ricci flow for instance, and the associated quantification by the Donaldson dynamical system, will be among the essential tools dealt with during the school.

  • Conference - Teichmüller Theory in Higher Dimension and Mirror Symmetry
    Apr 24, 2017 to Apr 28, 2017


    Angers, from April 24th to April 28th

    Organization board: Frédéric Mangolte, Etienne Mann, Laurent Meersseman, Alexis Roquefeuil

    Teichmüller theory and mirror symmetry are very active domains. In this conference, we propose two series of lectures by two world leader mathematicians :

    • Misha Verbitsky on Teichmüller theory
    • Dimitri Zvonkine, University Pierre et Marie Curie


    • Gaetan Borot, Max Planck Institut, Bonn
    • Fabrizio Catanese, University of Bayreuth
    • Amerik Ekaterina, University of Orsay (tbc)
    • Maxim Kontsevich, IHES (tbc)
    • Thomas Reichelt, University of Heidelberg
    • Jacopo Stoppa, SISSA
    • Claude Sabbah, Ecole polytechnique
    • Andrei Teleman, University of Aix-Marseille

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.


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.


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


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)


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



ANR CNRS Rennes 1 Rennes 2 Nantes INSA Rennes INRIA ENSRennes UBL