The endomorphism ring of an injective square-free module

Abstract

Let $M_R$ be an injective right module over a ring $R$. The goal of this paper to prove that the endomorphism ring $S=(M_R)$ of $M$ is quasi-duo if and only if $M_R$ is square-free.

arXiv commentIt was accepted for publication in Acta Mathematica Vietnamica and will be presented in my thesis as a subsection