Degeneration of cubic hypersurfaces and hyperKähler manifolds uniformised by a complex ball
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SFBKolloquium
Samuel Boissière (Poitiers)
What 


When 
Jun 14, 2018 from 03:30 pm to 04:30 pm 
Where  Mainz, 05432 (Hilbertraum) 
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Abstract.
The moduli space of cubic threefolds is the arithmetic quotient of the complementary of a hyperplane arrangement in the 10dimensional complex ball. This coincides with the period domain of a family of hyperKähler manifolds with an order three automorphism. I will explain what happens to the automorphism when the cubic threefold degenerates.