Séminaires


Retour à la liste de tous les séminaires


Symplectic structures on moduli spaces of framed sheaves on surfaces.

Le : 06/12/2011 10h30
Par : Francesco SALA (IHES-Lille-SISSA, Trieste)
Lieu : I 103
Lien web :
Résumé : After a brief introduction on the theory of framed sheaves and their moduli spaces, I will give a description of a modified Atiyah class of a family of framed sheaves, which allows to define a framed version of the Kodaira-Spencer map. Moreover, I will construct closed two-forms on the moduli spaces of framed sheaves on surfaces. As an application, I will define a symplectic structure on the moduli spaces of framed sheaves on the second Hirzebruch surface. This generalizes a result of Bottacin for the locally free case.