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How irrational is an irrational variety?

Rob Lazarsfeld

Location:  Via Zoom
Date & time: Wednesday, 18 November 2020 at 3:30PM - 4:30PM

Abstract:  Recall that an algebraic variety is said to be rational if it contains a Zariski-open subset isomorphic to a Zariski-open subset of projective space. Subtle questions of rationality have seen a great deal of recent interest and progress, but most varieties aren't rational. I will survey a developing body of work in a complementary direction, centered around measures of irrationality for varieties whose non-rationality is known.

For access to the colloquium please email Alex Kontorovich

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