Institut de Mathématiques de Toulouse

Les événements de la journée

3 événements

  • Mathématiques de l’apprentissage

    Jeudi 17 mai 2018 12:30-13:30 - Thien Trang Bui - IMT

    Groupe de lecture Deep Learning

    Résumé : Presentation of the paper :
    Unsupervised learning by predicting noise, Piotr Bojanowski and Armand Joulin (2017).

    Lieu : Salle 207, bât 1R2

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  • Séminaire Mathématiques pour la biologie

    Jeudi 17 mai 2018 13:30-14:30 - Susely Figueroa (IMT)

    Long time evolutionary dynamics of phenotypically structured populations in time periodic environments

    Résumé : I will present a study of the long time behavior of a parabolic Lotka-Volterra type equation considering a time-periodic growth rate with non-local competition. Such equation describes the dynamics of a phenotypically structured population under the effect of mutations and selection in a time-periodic fluctuating environment. We first prove that, in long time, the solution converges to the unique periodic solution of the problem. Next, we describe this periodic solution asymptotically as the effect of the mutations vanish by using a theory based on Hamilton-Jacobi equations with constraint, proving that the solution concentrates on a single Dirac mass, while the size of the population varies periodically in time. When the effect of the mutations are small but nonzero, we provide some formal approximations of the moments of the population’s distribution. As an application we show, via some examples, how such results could be compared to biological experiments.

    Lieu : salle MIP, 1er étage bat 1R3

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  • GT Corrélations et concentration

    Jeudi 17 mai 2018 14:00-15:30 - Reda Chhaibi

    Ensembles gaussiens, Ginibre et permanentaux.

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