Mathematics – Algebraic Geometry
Scientific paper
2004-02-04
J. Amer. Math. Soc. 19 (2006), 345-355
Mathematics
Algebraic Geometry
Scientific paper
We prove that Schubert varieties are globally F-regular in the sense of Karen Smith. We apply this result to the category of equivariant and holonomic D-modules on flag varieties in positive characteristic. Here recent results of Blickle are shown to imply that the simple D-modules coincide with local cohomology sheaves with support in Schubert varieties. Using a local Grothendieck-Cousin complex we prove that the decomposition of local cohomology sheaves with support in Schubert cells is multiplicity free.
Lauritzen Niels
Raben-Pedersen Ulf
Thomsen Jesper Funch
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