Étale Splittings of Certain Azumaya Algebras on Toric and Hypertoric Varieties in Positive Characteristic

Details Étale Splittings of Certain Azumaya Algebras on Toric and Hypertoric Varieties in Positive Characteristic Étale Splittings of Certain Azumaya Algebras on Toric and Hypertoric Varieties in Positive Characteristic

2011-02-21

arxiv.org/abs/1102.4139v1

Mathematics

Algebraic Geometry

22 pages, comments welcome

Scientific paper

For a smooth toric variety X over a field of positive characteristic, a T-equivariant \'{e}tale cover Y \rightarrow T^*X^{(1)} trivializing the sheaf of crystalline differential operators on X is constructed. This trivialization is used to show that the sheaf of differential operators is a trivial Azumaya algebra along the fibers of the moment map. This result is then extended to certain Azumaya algebras on hypertoric varieties, whose global sections are central reductions of the hypertoric enveloping algebra in positive characteristic. A criteria for a derived Beilinson-Bernstein localization theorem is then formulated.

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