What determines a variety?

par Prof. János Kollár (Princeton)

jeudi 16 avr. 2020, 15:30 → 16:30 Europe/Paris

A scheme X is a topological space -which we denote by |X|- and a sheaf of rings on the open subsets of |X|.  We study the following natural but seldom considered questions. How to read off properties of X from |X|? Does |X| alone determine X? Joint work with  Max Lieblich, Martin Olsson, and Will Sawin.