Note on weakly nil clean and 7t-regular rings
FILOMAT(2023)
摘要
Let R be a commutative ring with identity 1 # 0. The ring R is called weakly nil clean if every element x of R can be written as x = n + e or x = n - e, where n is a nilpotent element of R and e is an idempotent element of R. The ring R is called weakly nil neat if every proper homomorphic image of R is weakly nil clean. Among other results, this paper gives some new characterizations of weakly nil clean (resp. weakly nil neat) rings. An element x E R is said to be von Neumann regular if x = x2y for some y E R, and xis said to be 7t-regular if xn = x2ny for some y E R and some integer n >= 1. It is proved that an element x E R is 7t-regular if and only if it can be written as x = n + r, where n is a nilpotent element and r is a von Neumann regular element. In this paper, we study the uniqueness of this expression.
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关键词
Weakly nil clean rings,7t-regular rings
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