On the centralizer of a balanced nilpotent section
On the centralizer of a balanced nilpotent section
复制标题
关于平衡幂零截面的扶正器
DOI:
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发表时间:
2018
期刊:
影响因子:
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通讯作者:
William D. Hardesty
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文献类型:
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作者:
William D. Hardesty
Let $G$ be a split reductive algebraic group defined over a complete discrete valuation ring $\mathbb{O}$, with residue field $\mathbb{F}$ and fraction field $\mathbb{K}$, where the fiber $G_{\mathbb{F}}$ is geometrically standard. A balanced nilpotent section $x \in \text{Lie}(G)$ can roughly be thought of as an $\mathbb{O}$-point in a $\mathbb{K}$ nilpotent orbit such that the corresponding orbits over $\mathbb{K}$ and $\mathbb{F}$ have the same Bala--Carter label. In this paper, we will establish a number of results on the structure of the centralizer $G^x \subseteq G$ of $x$. This includes a proof that $G^x$ is a smooth group scheme, and that the component groups of its geometric fibers are isomorphic.
DOI:
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发表时间:
2012
期刊:
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影响因子:
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作者:
Liebeck, Martin W.;Seitz, Gary M.
通讯作者:
Seitz, Gary M.