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January 18, 2016
Monday, January 18
Geometry and Topology
Time: 15:30
Speaker: Nicole Lemire (Western)
Title: "Pushforwards of Tilting Sheaves"
Room: MC 107

Abstract: In joint work with A. Dhillon and Y. Yan, we investigate the behaviour of tilting sheaves under pushforward by a finite Galois morphism. We determine conditions under which such a pushforward of a tilting sheaf is a tilting sheaf. We then produce some examples of Severi Brauer flag varieties and arithmetic toric varieties in which our method produces a tilting sheaf, adding to the list of positive results in the literature. We also produce some counterexamples to show that such a pushfoward need not be a tilting sheaf.