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arXiv 1502.01210math.ACmath.AGmath.NT
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环的Galois闭包及相关构造

The Galois closure for rings and some related constructions

Alberto Gioia

摘要:

设$R$是环,$A$是秩为$n$的有限射影$R$ -代数. Manjul Bhargava和Matthew Satriano最近构造了一个$R$ -代数$G(A/R)$,它是$A/R$的伽罗瓦闭包.在论文的最后提出了许多自然的问题。在这里,我们解决这些问题之一,证明存在的自然结构,他们称之为中间$S_n$ -闭包。我们还将研究这些结构的性质,推广他们的一些结果,并证明新的结果都在中间$S_n$ -闭包和$G(A/R)$。

英文摘要:

Let $R$ be a ring and let $A$ be a finite projective $R$-algebra of rank $n$. Manjul Bhargava and Matthew Satriano have recently constructed an $R$-algebra $G(A/R)$, the Galois closure of $A/R$. Many natural questions were asked at the end of their paper. Here we address one of these questions, proving the existence of the natural constructions they call intermediate $S_n$-closures. We will also study properties of these constructions, generalizing some of their results, and proving new results both on the intermediate $S_n$-closures and on $G(A/R)$.

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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