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Séminaire Analyse

organisé par l'équipe Analyse

  • Palmirotta Guenda

    Bridging Patterson–Sullivan, Wigner, and Ruelle distributions: the graph case

    2 avril 2026 - 11:00Salle de conférences IRMA

    Consider the eigenvalue problem for the discrete Laplacian on finite regular graphs. One can relate three types of phase space distributions associated to the resulting eigenfunctions, namely Patterson–Sullivan, invariant Ruelle, and Wigner distributions. It has been shown that, on hyperbolic surfaces, these three phase-space distributions are asymptotically equivalent, naturally raising the question of whether a similar relationship holds for finite graphs. In this talk, I will show how discrete analogues of these distributions can be defined and how they relate to each other.

  • Stéphane Mischler

    Longtime behavior for evolution PDEs - An overview of semigroup techniques

    9 avril 2026 - 11:00Salle de conférences IRMA

    I will present an overview of semi-group techniques that allow us to obtain, for certain EDPs, results showing the system’s return to equilibrium—sometimes at an optimal rate—and the existence of global solutions in a perturbed regime around the equilibrium.

  • Victor Le Guilloux

    TBA

    30 avril 2026 - 11:00Salle de conférences IRMA

  • Anatole Gaudin

    TBA

    11 juin 2026 - 11:00Salle de conférences IRMA