The birational Torelli problem for CalabiYau 3folds
John Ottem (Oslo)  Seminar Algebraic Geometry (SAG)
What 


When 
Jan 18, 2018 from 10:30 am to 11:30 am 
Where  Bonn, Hörsaal MPI, Vivatsgasse 7 
Contact Name  Sachinidis 
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The intersection of two general PGL(10)translates of the Grassmannian Gr(2,5) in P9 is a CalabiYau 3fold X,
and the intersection of the projective duals of the two translates is another CalabiYau 3fold Y. We show that
X and Y provide counterexamples to a certain ”birational” Torelli problem for CalabiYau 3folds, 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.