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Séminaire Arithmétique et géométrie algébrique

organisé par l'équipe Arithmétique et géométrie algébrique

  • Matteo Verni

    Galois covers between Calabi-Yau varieties

    12 février 2026 - 14:00Salle de séminaires IRMA

    The birational geometry of smooth projective complex varieties with trivial canonical bundle is a deep and intensively studied subject. While there has been a lot of work on birational maps between such varieties (for example, on birational automorphisms of Hyper-Kähler manifolds), less has been said about rational maps of degree at least two, which we will call rational covers. What restrictions do rational covers Y --> X (and especially their monodromy) impose on the geometry of X, when both X and Y have trivial canonical bundle? For a given X, when does there exists such a cover which is furthermore Galois?
    In this talk, we will present and answer various questions around this theme, with a particular interest in the case where X is Hyper-Kähler. The main motivation is the following question of Laza: can it be that any Hyper-Kähler deforms to one birational to A/G, where A is an abelian variety and G a finite group acting on it?

  • Abhishek Oswal

    tbd

    19 février 2026 - 14:00Salle de séminaires IRMA

  • Alessio Bottini

    tbd

    5 mars 2026 - 10:30Salle de séminaires IRMA

  • Enrico Fatighenti

    tbd

    12 mars 2026 - 10:30Salle de séminaires IRMA

  • Cécile Gachet

    tbd

    19 mars 2026 - 14:00Salle de séminaires IRMA

  • Andrea Gallese

    tbd

    2 avril 2026 - 14:00Salle de séminaires IRMA

  • German Stefanich

    tbd

    9 avril 2026 - 14:00Salle de séminaires IRMA