Authors: Andrunakievich A. V.
Abstract
The assiciative ring $R$ not obligatory with a unity is considered. Let $P\triangleleft R_R$ a fully reduced
right ideal, i.e. $a^2Q\Longrightarrow a\in Q$, where $a\in R$, $Q\triangleleft R_R$, $Q\supseteq P$. If for
any $r\in R$ there is $P$-idempotent $e\in R$, i.e. $e\notin P$, $e^2 e\in P$, $eP\subseteq P$ and for
$Q\triangleleft R_R$, $Q\supseteq P$ implication takes place, $e\notin Q\Longrightarrow r\in Q$, $P$ is
proved to be a two - sided ideal.
Institutul de Matematică Academia de Ştiinţe a Moldovei
str. Academiei 5, MD-2028 Chişinău, Moldova