Geometry Seminar - Abstracts


Tuesday 3 October 2023, 16:00 - 17:00 in HG00.616
João Mestre (University of Coimbra)
Deformations of holomorphic groupoids


Lie groupoids can encode geometric objects such as smooth actions, and foliations; deformations of Lie groupoids also relate to deformations of such objects. In this talk we’ll see the deformation cohomology of a (real) Lie groupoid, mention a few relations to the mentioned examples, and and how a interpretation in terms of vector bundles over a Lie groupoid can be used to study deformations of holomorphic groupoids. The deformation complex obtained for a holomorphic groupoid arises as the total complex of a double complex. It combines the deformation complex of the groupoid structure and the Kodaira-Spencer complex controlling deformations of the underlying complex manifold. The talk is based on ongoing work with Luca Vitagliano.

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