Rings in which all elements are the sum of a central element and an element from $Δ(R)$

Fuente: arXiv
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Autores principales: Danchev, Peter, Javan, Arash, Hasanzadeh, Omid, Moussavi, Ahmad
Formato: Preprint
Publicado: 2025
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author Danchev, Peter
Javan, Arash
Hasanzadeh, Omid
Moussavi, Ahmad
author_facet Danchev, Peter
Javan, Arash
Hasanzadeh, Omid
Moussavi, Ahmad
contents We define and consider in-depth the so-called $CΔ$ rings as those rings $R$ whose elements are a sum of an element in $C(R)$ and of an element in $Δ(R)$. Our achieved results somewhat strengthen these recently obtained by Ma-Wang-Leroy in Czechoslovak Math. J. (2024) as well as these due to Kurtulmaz-Halicioglu-Harmanci-Chen in Bull. Belg. Math. Soc. Simon Stevin (2019). Specifically, we succeeded to establish that exchange $CΔ$ rings are always clean as well as that exchange CN rings are strongly clean. Likewise, we prove that, for any ring $R$, the ring of formal power series $R[[x]]$ over $R$ is $CΔ$ if, and only if, so is $R$. And, furthermore, we show that, for any ring $R$, if the polynomial ring $R[x]$ is a $CΔ$ ring, then $R$ satisfies the Köthe conjecture. Some other closely related things concerning certain extensions of $CΔ$ rings are also presented.
format Preprint
id arxiv_https___arxiv_org_abs_2503_03643
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Rings in which all elements are the sum of a central element and an element from $Δ(R)$
Danchev, Peter
Javan, Arash
Hasanzadeh, Omid
Moussavi, Ahmad
Rings and Algebras
Representation Theory
16 S34, 16 U60
We define and consider in-depth the so-called $CΔ$ rings as those rings $R$ whose elements are a sum of an element in $C(R)$ and of an element in $Δ(R)$. Our achieved results somewhat strengthen these recently obtained by Ma-Wang-Leroy in Czechoslovak Math. J. (2024) as well as these due to Kurtulmaz-Halicioglu-Harmanci-Chen in Bull. Belg. Math. Soc. Simon Stevin (2019). Specifically, we succeeded to establish that exchange $CΔ$ rings are always clean as well as that exchange CN rings are strongly clean. Likewise, we prove that, for any ring $R$, the ring of formal power series $R[[x]]$ over $R$ is $CΔ$ if, and only if, so is $R$. And, furthermore, we show that, for any ring $R$, if the polynomial ring $R[x]$ is a $CΔ$ ring, then $R$ satisfies the Köthe conjecture. Some other closely related things concerning certain extensions of $CΔ$ rings are also presented.
title Rings in which all elements are the sum of a central element and an element from $Δ(R)$
topic Rings and Algebras
Representation Theory
16 S34, 16 U60
url https://arxiv.org/abs/2503.03643