Very cleanness of generalized matrices
author
Abstract:
An element $a$ in a ring $R$ is very clean in case there exists an idempotent $ein R$ such that $ae = ea$ and either $a- e$ or $a + e$ is invertible. An element $a$ in a ring $R$ is very $J$-clean provided that there exists an idempotent $ein R$ such that $ae = ea$ and either $a-ein J(R)$ or $a + ein J(R)$. Let $R$ be a local ring, and let $sin C(R)$. We prove that $Ain K_s(R)$ is very clean if and only if $Ain U(K_s(R))$, $Ipm Ain U(K_s(R))$ or $Ain K_s(R)$ is very J-clean.
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Journal title
volume 43 issue 5
pages 1457- 1465
publication date 2017-10-31
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