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< 2019 >
March 24 - March 30
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  • 24
    March 24, 2019
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  • 25
    March 25, 2019
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  • 26
    March 26, 2019
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  • 27
    March 27, 2019
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  • 28
    March 28, 2019
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  • 29
    March 29, 2019

    Instantons and lattices of smooth 4-manifolds with boundary

    3:30 PM-4:30 PM
    March 29, 2019
    Science Center 507
    1 Oxford Street, Cambridge, MA 02138 USA
    Abstract:

    Given a 3-manifold Y, what are the possible definite intersection forms of smooth 4-manifolds with boundary Y? Donaldson’s theorem says that if Y is the 3-sphere, then all such intersection forms are standard integer Euclidean lattices. I will survey some new progress on this problem, for other 3-manifolds, that comes from instanton Floer theory.

  • 30
    March 30, 2019
    No events