Institut de Mathématiques de Toulouse

Les événements de la journée

2 événements

  • Tests multiples

    Jeudi 9 mars 2017 13:45-15:15 - Mélisande Albert - IMT

    Tests de permutation

    Résumé :

    • tests de permutation
    • preuve du Lemme de Romano et Wolf (2005)

    Lieu : Salle Picard (Bat 1R2 Salle 129)

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  • Séminaire Mathématiques pour la biologie

    Jeudi 9 mars 2017 15:30-16:30 - Christelle Etchegaray - Université Paris Descartes

    Two models for cell migration

    Notes de dernières minutes : Cell migration is a fundamental phenomenon involved in physiological and pathological processes. To ensure these functions, cells are able to migration in very different environments, thanks to their internal organization : a large number of subunits permanently interact on different time and space scales. Moreover, this activity results from stochastic and redondant reactions, so that cells macroscopic behaviours are hardly predictable. Mathematical modelling therefore constitutes an important tool, and is also challenging. In this talk, I will study the case of a cell crawling on a surface. To model this out-of-equilibrium multiscale system, I developped two approaches. In a first stochastic model, the cell is a point which displacement results from the dynamics of observable characters of the cell. Then, in a deterministic model, intracellular multiscale interactions are described, for a fixed cell shape. I will present these two approaches, and show how they allow to capture key mechanisms of migration, and to show different migratory behaviours. This work is a collaboration with Nicolas Meunier (MAP5, Paris Descartes) and Raphaël Voituriez (LJP, LPTMC, CNRS, UPMC).

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