When the Annihilator Graph of a Commutative Ring Is Planar or Toroidal?

Abstract

Let $R$ be a commutative ring with identity, and let $Z(R)$ be the set of zero-divisors of $R$. The annihilator graph of $R$ is defined as the undirected graph $AG(R)$ with the vertex set $Z(R{)}^{\ast }=Z(R)\setminus \{0\}$, and two distinct vertices $x$ and $y$ are adjacent if and only if $an{n}_R(xy)\ne an{n}_R(x)\cup an{n}_R(y)$. In this paper, all rings whose annihilator graphs can be embed on the plane or torus are classified.

11 pages, 1 figure