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- W2091577553 abstract "Let $G$ be a finitely generated abelian-by-finite group and $k$ a field of characteristic $pge 0$. 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." @default.
- W2091577553 created "2016-06-24" @default.
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- W2091577553 date "2001-12-12" @default.
- W2091577553 modified "2023-09-22" @default.
- W2091577553 title "On Euler classes of abelian-by-finite groups" @default.
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