On Euler classes of abelian-by-finite groups
On Euler classes of abelian-by-finite groups
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关于阿贝尔有限群的欧拉类
DOI:
10.1515/jgth.2003.014
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发表时间:
2001
期刊:
影响因子:
--
通讯作者:
M. Lorenz
中科院分区:
文献类型:
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作者:
M. Lorenz
Let $G$ be a finitely generated abelian-by-finite group and $k$ a field of characteristic $p\ge 0$. The Euler class $[k_G]$ of $G$ over $k$ is the class of the trivial $kG$-module in the Grothendieck group $G_0(kG)$. We show that $[k_G]$ has finite order if and only if every $p$-regular element of $G$ has infinite centralizer in $G$. We also give a lower bound for the order of the Euler class in terms of suitable finite subgroups of $G$. This lower bound is derived from a more general result on finite-dimensional representations of smash products of Hopf algebras.
DOI:
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发表时间:
2022
期刊:
影响因子:
--
作者:
Hanihara Norihiro;Norihiro Hanihara;Norihiro Hanihara
通讯作者:
Norihiro Hanihara