Abstract.
Bezrukavnikov, Mirkovic and Rumynin have recently obtained a derived version of the Beilinson-Bernstein localization theorem for the the Lie algebra of a semisimple algebraic group in positive characteristic p using the sheaf of rings of crystalline differential operators. A central reduction of is the first term of the p-filtration of the ring of the standard differential operators. We observe that the direct image functors of -modules on smooth varieties do not behave well; Kashiwara’s equivalence for a closed immersion fails, for example. On the other hand, we find that the direct image as -modules of the structure sheaf of the Frobenius neighbourhood of a point in each Chevalley-Bruhat cell under its inclusion in the flag variety realizes upon taking global sections an infinitesimal Verma module.
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Revised version: 27 April 2004
Supported in part by JSPS Grant in Aid for Scientific Research
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Kaneda, M. On Kashiwara’s equivalence in positive characteristic. manuscripta math. 114, 457–468 (2004). https://doi.org/10.1007/s00229-004-0473-x
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DOI: https://doi.org/10.1007/s00229-004-0473-x