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< 2019 >
April 21 - April 27
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  • 21
    April 21, 2019
    No events
  • 22
    April 22, 2019
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  • 23
    April 23, 2019
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  • 24
    April 24, 2019
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  • 25
    April 25, 2019
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  • 26
    April 26, 2019

    Heegaard Floer and homology cobordism

    3:30 PM-4:30 PM
    April 26, 2019
    Science Center 507
    1 Oxford Street, Cambridge, MA 02138 USA
    Abstract:

    We show that the three-dimensional homology cobordism group admits an infinite-rank summand. It was previously known that the homology cobordism group contains an infinite-rank subgroup and a Z-summand. The proof relies on the involutive Heegaard Floer homology package of Hendricks-Manolescu and Hendricks-Manolescu-Zemke. This is joint work with I. Dai, M. Stoffregen, and L. Truong.

  • 27
    April 27, 2019
    No events