Rings whose associated extended zero-divisor graphs are complemented

Abstract

Let $R$ be a commutative ring with identity $1\ne 0$. In this paper, we continue the study started in [10] concerning when the extended zero-divisor graph of $R$, $\overline{\Gamma }(R)$, is complemented. We also study when $\overline{\Gamma }(R)$ is uniquely complemented. We give a complete characterization of when $\overline{\Gamma }(R)$ of a finite ring is complemented. Various examples are given using the direct product of rings and idealizations of modules.