On the affineness of distinguished Deligne-Lusztig varieties

On the affineness of distinguished Deligne-Lusztig varieties
复制标题

德利涅-鲁斯蒂格杰出品种的亲缘关系

DOI:
10.1016/j.jalgebra.2013.05.025
复制
发表时间:
2013
期刊:
影响因子:
0.9
通讯作者:
S. Harashita
S. Harashita
中科院分区:
数学3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

文献摘要

相似文献

我们考虑具有固定类型的抛物线子群变化中的 Deligne-Lusztig 簇。在本文中,我们给出了杰出 Deligne-Lusztig 品种的亲和性标准,扩展并完善了原始的 Deligne-Lusztig 标准。特别是,我们证明了杰出的 Deligne-Lusztig 簇除了可能是小 q 之外都是仿射的,并且与 2 级组相关的所有杰出的 Deligne-Lusztig 簇都是仿射的。
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.