Automorphisms of Fusion Systems of Finite Simple Groups of Lie Type(Memoirs of the American Mathematical Society)

Lie型有限简单群融合系统的自同构

代数学

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出版时间
2020年06月30日
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平装
ISBN
9781470437725
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页      码
115
语      种
英文
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图书简介
For a finite group $G$ of Lie type and a prime $p$, the authors compare the automorphism groups of the fusion and linking systems of $G$ at $p$ with the automorphism group of $G$ itself. When $p$ is the defining characteristic of $G$, they are all isomorphic, with a very short list of exceptions. When $p$ is different from the defining characteristic, the situation is much more complex but can always be reduced to a case where the natural map from $mathrm{Out}(G)$ to outer automorphisms of the fusion or linking system is split surjective. This work is motivated in part by questions involving extending the local structure of a group by a group of automorphisms, and in part by wanting to describe self homotopy equivalences of $BG^wedge _p$ in terms of $mathrm{Out}(G)$.
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