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  • Lebesgue Master Scholarship
    Nov 15, 2017 to Mar 15, 2018
    lebesgue_money.png The Lebesgue Center offers 10,000€ scholarships to outstanding mathematics students applying for a master programme in mathematics, for a fist year of Master (M1) or for a second year of Master (M2), in Rennes, Nantes, Angers, Brest or Vannes.


    The stipend is 10,000 euros per year.

    The M1 scholarships are open to all students who have completed a bachelor's degree in mathematics (or related) at the end of the academic year 2016-2017. The applicants for the Lebesgue M1 scholarship should certify a B1 level of proficiency of the French language.
    A student applying for the first year of a master (M1) will be allowed to apply for another scholarship for the second year (M2).

    The M2 scholarships are open to all students who have completed the first year of a master in mathematics (or related) at the end of the academic year 2016-2017.
    The courses of the second year of Master (M2) may be taught in English.

    The application of the Lebesgue scholarship is independent from the application to Masters programmes, whom modalities are indicated in the dedicated websites.


    The application for the lebesgue Master Scholarship is open until March 15th, 2018.
    The results of the selection process will be edited in April 2017.


    Applicants can obtain more information about the masters programmes on the page: Information.


    Applicants must complete the online form and attach the documents:
    - CV
    - Transcripts
    - Cover letter
    - One or more letters of recommendation.

    Applicants must submit the application only when it is complete. Only electronic submission using the online form will be considered.


    The selection will be carried out by the Lebesgue Scientific Committee and the heads of the Masters programmes. It will be based on the academic quality of the applicant.

  • 5 minutes Lebesgue
    Dec 12, 2017

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

    Prochain exposé : Rediffusion

    12-12-2017:  Thomas Guyard
    Construction du logarithme : Approches historique et mathématique



    Exposés à venir:

    15-12-2017:  François Sauvageot

    19-12-2017:  Guy Casale

    23-01-2017:  Zoïs Moitier

    06-02-2018:  Rozenn Texier-Picard

    20-03-2018:  Loïc Le Marrec

    27-03-2018:  Juliette Bavard

  • Forum Emploi Mathématiques
    Dec 13, 2017

    Forum Emploi Mathématiques (FEM)

    Le FEM connecte les étudiants et les formations en mathématiques aux besoins des entreprises. Le Centre Henri Lebesgue, son Agence de mathématiques pour l'innovation et les formations de Rennes, Brest, Vannes, Nantes et Angers y seront présents.

    Plus d'informations sur le site du Forum Emploi Mathématiques

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


    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. These lectures are for Master (or PhD) students who had followed a introduction to algebraic geometry that is algebraic varieties and sheaves.
    • Loic Chaumont: Application of the matrix-tree-theorem

    The organisation board will pay the housing with breakfast and the lunches. The dinners are not payed by the organizers. For the travel expenses, we will do our best in the limit of our budget.

    Deadline 15th novembre. Limit 30 participants maximum.

  • Journée Python et Data Science
    Dec 19, 2017

    Le Groupe Calcul avec le soutien financier de la Mission pour l’interdisciplinarité du CNRS et du Centre Henri Lebesgue, propose une journée consacrée au langage Python, à l'écosystème disponible pour tous les "Data scientists " et à des exemples concrets d'utilisation.

    Le programme: ...

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

    Rennes, from February 19th to February 23rd

    Organization 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 - Mathematics and Enterprises Days
    Apr 12, 2018 to Apr 13, 2018

    Vannes, from April 12th to April 13th

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

    Pour répondre aux besoins croissants en moyens de calcul, les entreprises et les laboratoires de recherche développent intensément de nouvelles méthodes numériques, des logiciels et du matériel. L'objectif de ces journées est de permettre aux différents acteurs d'échanger sur les dernières avancées pour améliorer les performances du calcul scientifique. Des exemples d'applications seront présentés dans plusieurs domaines : auto-apprentissage, consommations électriques, télédétection, biologie...
    Ces journées sont organisées par l’agence Lebesgue de mathématiques pour l'innovation dont une des missions est de promouvoir les relations entre les mathématiciens et les scientifiques des entreprises.
    L’Agence est un interlocuteur naturel pour tout acteur du monde industriel confronté à un problème mathématique identifié. Il s’agit d’offrir les meilleures compétences mathématiques disponibles dans les Unités Mixtes de Recherche en Bretagne et Pays de la Loire, en particulier dans le domaine du calcul scientifique.

  • School - Fundamentals and practice of finite elements
    Apr 16, 2018 to Apr 20, 2018

    Roscoff, from April 16th to April 20th

    Organization board: Martin Costabel, Eric Darrigrand, Monique Dauge, Yvon Lafranche

    Scientific board: Monique Dauge (Univ. Rennes 1), Ilaria Perugia (University of Vienna)

    This school will combine high-level courses on theoretical aspects of finite elements, with more practical implementation issues via an open source C++ library . We propose three different activities:

    1) The three main courses (ca 5h each) given by

    Ricardo Nochetto, University of Maryland, USA
    Adaptive Finite Element Methods: Convergence and Optimality

    Paul Houston, University of Nottingham, UK
    Discontinuous Galerkin Finite Element Methods on Polytopic Meshes

    Ralf Hiptmair, ETH Zürich, Suisse
    Boundary Element Methods: Design, Analysis, and Implementation

    2) An initiation to the finite element library XLiFE++ by Eric Lunéville, POEMS team, ENSTA ParisTech, followed by several practical sessions on computers.

    3) A few mini-courses about different related questions (eigenvalues, integral equations, fast methods, singularities) given by members of the organization board.

Thursday, January 26, 2017

All day
Before 01
Conference - CAST - Contact and Symplectic Topology
Jan 26, 2017 to Jan 28, 2017


Download the poster in pdf

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

Jan 26, 2017

By using generating functions, Viterbo constructed spectral invariants for Lagrangians of cotangent bundles in 1992. Ten years later, Oh and Schwarz (independently) adapted the construction to Hamiltonian diffeomorphism groups of quite general manifolds thanks to Floer theory. Since then, spectral invariants were defined in various contexts and yielded a great number of applications of different natures.

I will tak about joint work with Frol Zapolsky in which we define spectral invariants for monotone Lagrangians and establish the properties which make them such a useful tool. In particular, given a monotone Lagrangian L, I will show how spectral invariants can be seen as functions defined on the universal cover of the product of the set of Lagrangians Hamiltonian isotopic to L and the Hamiltonian diffeomorphism group. Then, I'll show that these functions are Lipschitz with respect to the natural Hofer distance on this space.

Jan 26, 2017

In this talk, I will explain how for a contact manifold the existence of a dynamically convex supporting contact form ensures compactness of Floer moduli spaces and thus allows us to define Rabinowitz Floer homology in a symplectisation. In this setting, the Rabinowitz Floer homology groups give a means to deduce existence results of translated points as introduced by Sandon. This is joint work with Matthias Meiwes.

Jan 26, 2017

We show that every nondegenerate contact form on a closed connected three-manifold, such that the associated contact structure has torsion first Chern class, has either two or infinitely many simple Reeb orbits. (By previous work, two simple Reeb orbits are possible only when the three-manifold is a sphere or a lens space.) Joint work with Dan Cristofaro-Gardiner and Dan Pomerleano.





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