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arXiv math/0701918math.ACmath.CO
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交换环的同极大图

Comaximal graph of commutative rings

Hamid Reza Maimani, Maryam Salimi, Asiyeh Sattari, Siamak Yassemi

摘要:

设$R$是有单位元的交换环.设$Γ(R)$是一个图,其顶点为$R$的元素,其中两个不同的顶点$a$和$b$相邻当且仅当$Ra+Rb=R$ .本文考虑$Γ(R)$的一个由非单位元素组成的子图$Γ_2(R)$.我们看看这个图的连通性和直径。我们完全刻画了图$Γ_2(R)\setminus\J(R)$的直径。此外,证明了对两个有限半局部环$R$和$S$,如果$R$是约化的,则$Γ(R)\congΓ(S)$当且仅当$R\cong S$。

英文摘要:

Let $R$ be a commutative ring with identity. Let $Γ(R)$ be a graph with vertices as elements of $R$, where two distinct vertices $a$ and $b$ are adjacent if and only if $Ra+Rb=R$. In this paper we consider a subgraph $Γ_2(R)$ of $Γ(R)$ which consists of non-unit elements. We look at the connectedness and the diameter of this graph. We completely characterize the diameter of the graph $Γ_2(R)\setminus\J(R)$. In addition, it is shown that for two finite semi-local rings $R$ and $S$, if $R$ is reduced, then $Γ(R)\congΓ(S)$ if and only if $R\cong S$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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