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arXiv 0804.0978math.RAmath.GR
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群环的正规性

Normality in group rings

V. A. Bovdi, S. Siciliano

摘要:

设$KG$是单位交换环$K$上群$G$的群环.环$KG$被描述为$xx^σ=x^σx$对于所有$x=\sum_{g\in G}α_gg\in KG$,其中\quad $x\mapsto x^σ=~\sum_{g\in G}α_gf(g)σ(g)$ \quad是$KG$的对合;这里$f: G\to U(K)$是同态,$σ$是$G$的二阶反自同构。

英文摘要:

Let $KG$ be the group ring of a group $G$ over a commutative ring $K$ with unity. The rings $KG$ are described for which $xx^σ=x^σx$ for all $x=\sum_{g\in G}α_gg\in KG$, where \quad $x\mapsto x^σ=~\sum_{g\in G}α_gf(g)σ(g)$\quad is an involution of $KG$; here $f: G\to U(K)$ is a homomorphism and $σ$ is an anti-automorphism of order two of $G$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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