Weakly $r$-clean rings and weakly $\star$-clean rings

zbMATH Open1474.16097arXiv1702.06734MaRDI QIDQ4989858

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Publication date: 26 May 2021

Abstract: Motivated by the concept of weakly clean rings, we introduce the concept of weakly $r$-clean rings. We define an element $x$ of a ring $R$ as weakly $r$-clean if it can be expressed as $x=r+e$ or $x=r-e$ where $e$ is an idempotent and $r$ is a regular element of $R$. If all the elements of $R$ are weakly $r$-clean then $R$ is called a weakly $r$-clean ring. We discuss some of its properties in this article. Also we generalise this concept of weakly $r$-clean ring to weakly $g(x)$-$r$-clean ring, where $g(x)inC(R)[x]$ and $C(R)$ is the centre of the ring $R$. Finally we introduce the concept of weakly $star$-clean and $star$-$r$-clean ring and discuss some of their properties.

Full work available at URL: https://arxiv.org/abs/1702.06734

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