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Title:
Co-associative fibrations of G2 manifolds
Speaker:
Abstract:
I will describe a plausible model for the geometry of certain collapsed limits of 7-dimensional manifolds with exceptional holonomy G_2. The structure considered is a "Kovalev-Lefschetz fibration", with K3 fibres, and in the limit the fibres shrink to points. The limiting geometry is given locally by a stationary 3-dimensional submanifold in a space of indefinite signature. The first part of the talk will review background in G_2 geometry.
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