Abstract
The rings considered in this article are commutative with identity. For an ideal $I$ of a ring $R$, we denote the annihilator of $I$ in $R$ by $Ann(I)$. An ideal $I$ of a ring $R$ is said to be an exact annihilating ideal if there exists a non-zero ideal $J$ of $R$ such that $Ann(I) = J$ and $Ann(J) = I$. For a ring $R$, we denote the set of all exact annihilating ideals of $R$ by $\mathbb{EA}(R)$ and $\mathbb{EA}(R)\backslash \{(0)\}$ by $\mathbb{EA}(R)^{*}$. Let $R$ be a ring such that $\mathbb{EA}(R)^{*}\neq \emptyset$. With $R$, in [Exact Annihilating-ideal graph of commutative rings, {\it J. Algebra and Related Topics} {\bf 5}(1) (2017) 27-33] P.T. Lalchandani introduced and investigated an undirected graph called the exact annihilating-ideal graph of $R$, denoted by $\mathbb{EAG}(R)$ whose vertex set is $\mathbb{EA}(R)^{*}$ and distinct vertices $I$ and $J$ are adjacent if and only if $Ann(I) = J$ and $Ann(J) = I$. In this article, we continue the study of the exact annihilating-ideal graph of a ring. In Section 2 , we prove some basic properties of exact annihilating ideals of a commutative ring and we provide several examples. In Section 3, we determine the structure of $\mathbb{EAG}(R)$, where either $R$ is a special principal ideal ring or $R$ is a reduced ring which admits only a finite number of minimal prime ideals.
Highlights
The rings considered in this article are commutative with identity which are not integral domains
We continue the study of the exact annihilating-ideal graph of a ring
For non-zero proper ideals I, J of a reduced ring R which is not an integral domain, it is proved in Theorem 2.16 that the statements (1) EA(R)∗ = {I, J}; (2) J = Ann(I), I, J ∈ Spec(R); and (3) M in(R) = {I, J} are equivalent
Summary
Recall from [15] that the exact zerodivisor graph of R, denoted by EΓ(R) is an undirected graph whose vertex set is EZ(R)∗ and distinct vertices x and y are adjacent in EΓ(R) if and only if Ann(x) = Ry and Ann(y) = Rx. Several properties of the exact zero-divisor graph of a commutative ring were investigated in [15, 16]. Recall from [17] that the exact annihilating-ideal graph of R, denoted by EAG(R) is an undirected graph whose vertex set is EA(R)∗ and distinct vertices I and J are adjacent in EAG(R) if and only if Ann(I) = J and Ann(J) = I. For non-zero proper ideals I, J of a reduced ring R which is not an integral domain, it is proved in Theorem 2.16 that the statements (1) EA(R)∗ = {I, J}; (2) J = Ann(I), I, J ∈ Spec(R); and (3) M in(R) = {I, J} are equivalent.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
