Geodesic
Symmetrization in clean and nil-clean rings
Izvestiya of Saratov University. Mathematics. Mechanics. Informatics, Tome 20 (2020) no. 2, pp. 154-160.

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We introduce and investigate D-clean and D-nil-clean rings as well as some other closely related symmetric versions of cleanness and nil-cleanness. A comprehensive structural characterization is given for these symmetrically clean and symmetrically nil-clean rings in terms of Jacobson radical and its quotient. It is proved that strongly clean (resp., strongly nil-clean) rings are always D-clean (resp., D-nil-clean).Our results corroborate our recent findings published in Bull. Irkutsk State Univ., Math. (2019) and Turk. J. Math. (2019). We also show that weakly nil-clean rings defined as in Danchev-McGovern (J. Algebra, 2015) and Breaz – Danchev – Zhou (J. Algebra Appl., 2016) are actually weakly nil clean in the sense of Danchev-Šter (Taiwanese J. Math., 2015). This answers the question of the reviewer D. Khurana (Math. Review, 2017). 
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P. V. Danchev. Symmetrization in clean and nil-clean rings. Izvestiya of Saratov University. Mathematics. Mechanics. Informatics, Tome 20 (2020) no. 2, pp. 154-160. http://geodesic.mathdoc.fr/item/ISU_2020_20_2_a1/

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