arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1909.08372math.RA
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k[x]的单侧逆上的非分裂模扩张

Nonsplit module extensions over the one-sided inverse of k[x]

Zheping Lu, Linhong Wang, Xingting Wang

摘要:

设$R$是由两个元素$x$和$y$通过定义关系$yx=1$生成的结合$k$ -代数.利用Irving和Gerritzen的结果得到了$R$上单模的完整刻画.我们研究了短正合序列$0\rightarrow U\rightarrow E \rightarrow V\rightarrow 0$,其中$U$和$V$是简单的$R$ -模。结果表明,只有当$U$和$V$都是一维的,或者在一定条件下,$U$是无穷维的,而$V$是一维的,才有不分裂扩张.

英文摘要:

Let $R$ be the associative $k$-algebra generated by two elements $x$ and $y$ with defining relation $yx=1$. A complete description of simple modules over $R$ is obtained by using the results of Irving and Gerritzen. We examine the short exact sequence $0\rightarrow U\rightarrow E \rightarrow V\rightarrow 0$, where $U$ and $V$ are simple $R$-modules. It shows that nonsplit extension only occurs when both $U$ and $V$ are one-dimensional, or, under certain condition, $U$ is infinite-dimensional and $V$ is one-dimensional.

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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