Separability and complete reducibility of subgroups of the Weyl group of a simple algebraic group of type E7
Separability and complete reducibility of subgroups of the Weyl group of a simple algebraic group of type E7
复制标题
E7 型简单代数群的 Weyl 群子群的可分离性和完全可归约性
DOI:
10.1016/j.jalgebra.2014.09.021
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发表时间:
2013
影响因子:
0.9
通讯作者:
T. Uchiyama
中科院分区:
文献类型:
--
作者:
T. Uchiyama
Let G be a connected reductive algebraic group defined over an algebraically closed field k. The aim of this paper is to present a method to find triples (G, M, H) with the following three properties. Property 1: G is simple and k has characteristic 2. Property 2: H and M are closed reductive subgroups of G such that H< M< G, and (G, M) is a reductive pair. Property 3: H is G-completely reducible, but not M-completely reducible. We exhibit our method by presenting a new example of such a triple in G= E 7. Then we consider a rationality problem and a problem concerning conjugacy classes as important applications of our construction.
DOI:
10.1515/crelle.2008.063
发表时间:
2008
期刊:
Journal für die reine und angewandte Mathematik (Crelles Journal)
影响因子:
--
作者:
Bate M
通讯作者:
Bate M