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arXiv 2008.03803math.RAmath.AC
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关于作为四子环并的环

On rings as unions of four subrings

Jon Cohen

摘要:

结合环$R$的覆盖数是其并为$R$的真子环的最小数目。建立了一种对给定有限覆盖数的单位环进行分类的策略,得到了覆盖数为4的单位环的分类.在这个过程中,我们计算了每个有限局部环的剩余域具有素数阶的覆盖数。

英文摘要:

The covering number of an associative ring $R$ is the minimal number of proper subrings whose union is $R$. We establish a strategy to classify unital rings of a given finite covering number, and obtain a classification of unital rings whose covering number is four. Along the way we compute the covering number of every finite local ring whose residue field has prime order.

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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