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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

  • 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


    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

  • 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
  • Conference - Infinite measure Dynamics
    Jun 6, 2017 to Jun 9, 2017


    Brest, from June 6th to June 9th

    Organization board: Yves Coudène, François Maucourant, Françoise Pène, Barbara Schapira, Samuel Tapie

    Scientific board: Jon Aaronson, Jean-Pierre Conze, Gilles Courtois, Domokos Szasz

    This conference will focus on dynamical systems which naturally preserve a measure with infinite mass. These systems appear in a geometric or probabilistic context, or may come from natural sciences. When the invariant measure has infinite mass, recurrence is no longer automatic, usual mixing properties disappear and new asymptotical properties (such as rationnal ergodicity) may occur. Such systems may develop various and subtil behaviours, which could not exists in finite measure dynamics.

    This conference will gather international experts on this topic, and will allow young researcher to have an easy access to the large recent developpment on such questions.

  • Conference - Dynamics of algebraic transformations
    Jun 12, 2017 to Jun 16, 2017


    Rennes, from June 12th to June 16th

    Organization board: Serge Cantat, Christophe Dupont

Summer schools - Normal forms and large time behavior for nonlinear PDE

Place and period

This summer school took place at the Faculté des Sciences et Techniques, Université de Nantes, from June, 22nd to July, 3rd, 2015. The organization committee is the following : Erwan Faou, Benoît Grébert, Eric Paturel

Online material

Mini-courses and talks have been captured and are available online.

Presentation of the field

If normal forms were initially used in a finite dimensional setting, for a better understanding of the long time behavior of dynamical systems, their extension to partial differential equations, especially in the nonlinear case, have led to important progresses during this last decade. More than useful tools, they put in light some characteristic phenomena in complex situations where nonlinearity play a fondamental rôle. The aim of this summer school is to show their great adaptability in various fields (Hamiltonian PDEs, fluid mechanics, numerical analysis), and to explain how it works, in a manner accessible to starting researchers.


  • Dario Bambusi (University of Milan)
  • Hakan Eliasson (University Paris 7)
  • Isabelle Gallagher (University Paris-Diderot)
  • Nader Masmoudi (Courant Institute)
  • Pierre Raphaël (University of Nice)
  • Nikolay Tzvetkov (University of Cergy-Pontoise)
  • Luis Vega (Bilbao University)


  • Massimiliano Berti (SISSA Trieste)
  • Rémi Carles (CNRS - University of Montpellier)
  • Thomas Duyckaerts (Paris 13 University)
  • Patrick Gérard (University Paris-Sud)
  • Zaher Hani (Georgia Institute of Technology)
  • Thomas Kappeler (University of Zürich)
  • Evelyne Miot (Ecole Polytechnique)
  • Tadahiro Oh (University of Edinburgh)
  • Daniel Peralta-Salas (ICMAT Madrid)
  • Michela Procesi (University Rome - La Sapienza)
  • Frédéric Rousset (University Paris-Sud)
  • Laurent Thomann (University of Nantes)
  • Nicolà Visciglia (University of Pisa)



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