On the affineness of distinguished Deligne-Lusztig varieties
On the affineness of distinguished Deligne-Lusztig varieties
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德利涅-鲁斯蒂格杰出品种的亲缘关系
DOI:
10.1016/j.jalgebra.2013.05.025
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发表时间:
2013
影响因子:
0.9
通讯作者:
S. Harashita
中科院分区:
文献类型:
--
作者:
H. Ki;Y. Komori and M. Suzuki;Masatoshi Suzuki;Masatoshi Suzuki;Masatoshi Suzuki;Masatoshi Suzuki;Masatoshi Suzuki;Momonari Kudo and Shushi Harashita;鈴木正俊;S. Harashita
We consider Deligne–Lusztig varieties in the variety of parabolic subgroups with a fixed type. In this paper, we give a criterion for the affineness of distinguished Deligne–Lusztig varieties, extending and refining the original Deligne–Lusztig criterion. In particular we show that distinguished Deligne–Lusztig varieties are affine except possibly for small q, and that all distinguished Deligne–Lusztig varieties associated to rank-2 groups are affine.