Institut de Mathématiques de Marseille, UMR 7373




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Accueil > Séminaires > Séminaires et Groupes de travail hebdomadaires > Géométrie Complexe

Géométrie Complexe

par Lozingot Eric, Roulleau Xavier, Rousseau Erwan - publié le , mis à jour le

Agenda

Séminaire

  • Mardi 2 mai 11:00-12:00 - Andrei TELEMAN - I2M, Marseille

    On the moduli stack of class VII surface

    Résumé : Travail en collaboration avec G. Dloussky
    The most important gap in the Kodaira-Enriques classification table concerns the Kodaira class VII, e.g. the class of surfaces $X$ having $\mathrmkod(X) =- \infty$, $b_1(X) = 1$.
    The main conjecture which (if true) would complete the classification of class VII surfaces, states that any minimal class VII surface with $b_2 > 0$ contains $b_2$ holomorphic curves. A weaker conjecture states that any such surface contains a cycle of curves, and (if true) would complete the classification up to deformation equivalence.
    In a series of recent articles I showed that, at least for small $b_2$, the second conjecture can be proved using methods from Donaldson theory. In this talk I will concentrate on minimal class VII surfaces with $b_2\leq 2$, and I will present recent results on the geometry of the corresponding moduli stacks.

    JPEG - 12.6 ko

    Lieu : CMI, salle C003

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  • Mardi 9 mai 11:00-12:00 - Eleonora DI NEZZA - Imperial College, Londres

    T.B.A

  • Mardi 16 mai 11:00-12:00 - Karl OELJEKLAUS - I2M

    Actions de groupes de Schottky sur les variétés homogènes-rationnelles

    Résumé : We systematically study Schottky group actions on homogeneous rational manifolds and find two new families besides those given by Nori’s well-known construction. This yields new examples of non-Kähler compact complex manifolds having free fundamental groups. We then investigate their analytic and geometric invariants such as the Kodaira and algebraic dimension, the Picard group and the deformation theory, thus extending results due to Lárusson and to Seade and Verjovsky. As a byproduct, we see that the Schottky construction allows to recover examples of equivariant compactifications of SL(2, C)/Γ for Γ a discrete free loxodromic subgroup of SL(2, C), previously obtained by A. Guillot. (Travail commun avec CHRISTIAN MIEBACH, Calais)

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  • Mardi 23 mai 11:00-12:00 - Francesco POLIZZI - Università della Calabria

    T.B.A

  • Mardi 30 mai 11:00-12:00 - Robert Laterveer - Université de Strasbourg

    T.B.A

  • Mardi 6 juin 11:00-12:00 - Lassina DEMBELE - Université de Warwick

    T.B.A

  • Mardi 13 juin 11:00-12:00 - Benoît CLAUDON - CNRS, Nancy

    T.B.A

groupe de travail

Manifestation scientifique

Descriptif
Nature Séminaire
Intitulé Géométrie Complexe
Responsables Lionel Darondeau (postdoc Labex AGT),
Xavier Roulleau (PR AGT),
Erwan Rousseau (AGT)
Équipe de rattachement Analyse, Géométrie et Topologie (AGT)
Fréquence Hebdomadaire
Jour-Horaire Mardi. 11h-12h
Lieu CMI, salle C003 (accès)
Lien -

Contact : erwan.rousseau_AT_univ-amu.fr
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