Presented by:
John Christian Ottem
Date:
Monday 3rd February 2020 - 15:00 to 16:00
Venue:
INI Seminar Room 2
Abstract:
I will explain a construction of a certain
pencil of Enriques surfaces with non-algebraic integral Hodge classes of
non-torsion type. This gives the first example of a threefold with trivial
Chow group of zero-cycles on which the integral Hodge conjecture fails. If time
permits, I will explain an application to a classical question of Murre on
the universality of the Abel-Jacobi maps in codimension three. This is
joint work with Fumiaki Suzuki.
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