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- W2252599533 abstract "This paper is a continuation and a completion of [BoRo1]. We extend the Jordan decomposition of blocks: we show that blocks of finite groups of Lie type in non-describing characteristic are Morita equivalent to blocks of subgroups associated to isolated elements of the dual group. The key new result is the invariance of the part of the cohomology in a given modular series of Deligne-Lusztig varieties associated to a given Levi subgroup, under certain variations of parabolic subgroups. We also show that the equivalence arises from a splendid Rickard equivalence. Even in the setting of [BoRo1], the finer homotopy equivalence was unknown. As a consequence, the equivalence preserves defect groups and categories of subpairs. We finally determine when Deligne-Lusztig induced representations of tori generate the derived category of representations." @default.
- W2252599533 created "2016-06-24" @default.
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- W2252599533 date "2015-11-15" @default.
- W2252599533 modified "2023-09-27" @default.
- W2252599533 title "Derived categories and Deligne-Lusztig varieties II" @default.
- W2252599533 hasPublicationYear "2015" @default.
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