Abstract
This paper mainly gives some sufficient and necessary conditions for an element in a ring to be
Funding statement: Project was supported by the Yangzhou University students science and technology innovation fund project (X20210224) and Top-notch Academic Programs Project of Jiangsu Higher Education Institutions (PPZY2015B109).
Acknowledgements
We would like to express our sincere gratitude to the editor and anonymous reviewers for their valuable comments, which have essentially improved this paper.
References
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