Jianghua Li; Xiaoqing Sun; Xiaoqin Shen; Shangping Wang
(Український математичний журнал, 2012)
Some relations for quasiunit regular rings and QB-rings, as well as for pseudounit regular rings and QB ∞-rings, are obtained. In the first part of the paper, we prove that (an exchange ring R is a QB-ring) ⟺ (whenever x ...