Linear Preservers of Finite Reflection Groups
Linear Preservers of Finite Reflection Groups
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有限反射群的线性保持器
DOI:
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发表时间:
2003
期刊:
影响因子:
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通讯作者:
Thomas Milligan
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文献类型:
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作者:
Chi;Thomas Milligan
Let G be the finite reflection groups $ {\bf H}_3 , {\bf H}_4 , {\bf F}_4 , {\bf E}_8 , {\bf E}_7 $ or E 6 , acting irreducibly on the Euclidean space V . We show that there exists an overgroup $ \tilde G $ of G such that a linear operator $ \phi: {\rm End}(V) \rightarrow {\rm End}(V) $ satisfies θ ( G ) = G if and only if θ has the form $ X \mapsto PXQ $ or $ X \mapsto PX « tQ $ for some $ P, Q \in \tilde G $ . From our result, we can show that $ \tilde G $ is actually the normalizer of G in the group of orthogonal operators on V . Moreover, $ \tilde G = G $ except when G = F 4 .