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arxiv: 1509.02170 · v2 · pith:H3KYLLZGnew · submitted 2015-09-07 · 🧮 math.AG · math.RT

Pushforwards of Tilting Sheaves

classification 🧮 math.AG math.RT
keywords tiltingsheafproducepushforwardsheavessomeundervarieties
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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.

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