Seminars & Colloquia Calendar
How irrational is an irrational variety?
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.