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Derived categories of cubic fourfolds and their geometric applications

Math Colloquium Alex Perry 1/15 @ 3:15pm
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Wednesday, January 15, 2020
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3:15 pm - 4:15 pm
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Alex Perry (Columbia University)
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Algebraic Geometry Seminar

A fundamental problem in algebraic geometry is to determine whether a given algebraic variety is birational to projective space. This is most prominently open for cubic fourfolds, i.e. hypersurfaces defined by a cubic polynomial in a five-dimensional projective space. A decade ago, Kuznetsov suggested an approach to this problem using the derived category of coherent sheaves. I will explain recent applications of this perspective to fundamental questions in hyperkahler geometry and Hodge theory, which in turn shed light on the original question about cubic fourfolds.