arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.12575math.RA
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元素是中心元素与幂零元之和的环

Rings in which elements are a sum of a central and a nilpotent element

Yosum Kurtulmaz, Abdullah Harmancı

摘要:

本文引入了一类新的环,其元素是中心元素与幂零元之和,即环$R$称为$CN$,如果环$R$的每个元素$a$都有一个分解$a = c + n$,其中$c$是中心的,$n$是幂零的.在本文中,我们刻画了具有CN-分解的$M_n(R)$和$U_2(R)$中的元素。对于任意域$F$,我们给出例子证明了$M_n(F)$不可能是CN-环.对于除环$D$,证明了若$M_n(D)$是CN-环,则$D$的中心的基数严格大于$n$ .特别地,我们研究了CN环上的全矩阵环的某些子环是CN的几种条件。

英文摘要:

In this paper, we introduce a new class of rings whose elements are a sum of a central element and a nilpotent element, namely, a ring $R$ is called$CN$ if each element $a$ of $R$ has a decomposition $a = c + n$ where $c$ is central and $n$ is nilpotent. In this note, we characterize elements in $M_n(R)$ and $U_2(R)$ having CN-decompositions. For any field $F$, we give examples to show that $M_n(F)$ can not be a CN-ring. For a division ring $D$, we prove that if $M_n(D)$ is a CN-ring, then the cardinality of the center of $D$ is strictly greater than $n$. Especially, we investigate several kinds of conditions under which some subrings of full matrix rings over CN rings are CN.

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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