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arXiv 0805.0359math.RA
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一般局部环上$2\times 2$矩阵环的强清洁性

Strong cleanness of the $2\times 2$ matrix ring over a general local ring

Xiande Yang, Yiqiang Zhou

摘要:

环$R$称为强干净环,如果$R$的每个元素都是单位元与幂等元之和,且单位元与幂等元可交换. Borooah,Diesl和Dorsey \cite{BDD05a}最近的一个结果完全刻画了交换局部环$R$,其中${\mathbb M}_n(R)$是强干净的.然而,对于一般的局部环$R$和$n>1$,矩阵环${\mathbb M}_n(R)$何时是强干净的是未知的。在这里,我们完全确定局部环$R$,${\mathbb M}_2(R)$是强清洁。

英文摘要:

A ring $R$ is called strongly clean if every element of $R$ is the sum of a unit and an idempotent that commute with each other. A recent result of Borooah, Diesl and Dorsey \cite{BDD05a} completely characterized the commutative local rings $R$ for which ${\mathbb M}_n(R)$ is strongly clean. For a general local ring $R$ and $n>1$, however, it is unknown when the matrix ring ${\mathbb M}_n(R)$ is strongly clean. Here we completely determine the local rings $R$ for which ${\mathbb M}_2(R)$ is strongly clean.

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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