On Automorphisms and Focal Subgroups of Blocks
On Automorphisms and Focal Subgroups of Blocks
复制标题
关于块的自同构和焦点子群
DOI:
10.1007/978-3-319-94033-5_9
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发表时间:
2016
影响因子:
3.1
通讯作者:
M. Linckelmann
中科院分区:
文献类型:
--
作者:
M. Linckelmann
Given a p-block B of a finite group with defect group P and fusion system \({\mathcal {F}}\) on P, we show that the rank of the group \(P/\mathfrak {foc}({\mathcal {F}})\) is invariant under stable equivalences of Morita type. The main ingredients are the \(*\)-construction, due to Broue and Puig, a theorem of Weiss on linear source modules, arguments of Hertweck and Kimmerle applying Weiss’ theorem to blocks, and connections with integrable derivations in the Hochschild cohomology of block algebras.