Posted in
Speaker:
John Ottem
Affiliation:
Oslo
Date:
Thu, 18/01/2018 - 10:30 - 12:00
Location:
MPIM Lecture Hall
Parent event:
Seminar Algebraic Geometry (SAG) The intersection of two general PGL(10)-translates of the Grassmannian Gr(2,5)
in P9 is a Calabi-Yau 3-fold X, and the intersection of the projective duals of
the two translates is another Calabi-Yau 3-fold Y. We show that X and Y provide
counterexamples to a certain ”birational” Torelli problem for Calabi-Yau 3-folds,
namely, they are deformation equivalent, derived equivalent, and have isomorphic
Hodge structures, yet they are not birational.
This is joint work with Jørgen Vold Rennemo.
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