Torsion in tensor powers of modules

Torsion in tensor powers of modules
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DOI:
10.1215/00277630-3140827
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发表时间:
2014-12
影响因子:
0.8
通讯作者:
Olgur Celikbas;S. Iyengar;Greg Piepmeyer;R. Wiegand
Olgur Celikbas;S. Iyengar;Greg Piepmeyer;R. Wiegand
中科院分区:
数学2区
文献类型:
--
作者:
Olgur Celikbas;S. Iyengar;Greg Piepmeyer;R. Wiegand

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摘要张量积通常具有非零挠率。这是Auslander 1961年论文的中心主题;这个主题在Huneke和Wiegand 20世纪90年代的工作中继续存在。本文的主要内容是讨论局部环上的一个环生成模的张量幂。此外,我们还研究了无挠模N的性质,即M <$RN有非零挠,除非M非常特殊。这样的模N的一个重要例子是特征p > 0的完全相交域R上的Frobenius幂pe R。
Abstract Tensor products usually have nonzero torsion. This is a central theme of Auslander's 1961 paper; the theme continues in the work of Huneke and Wiegand in the 1990s. The main focus in this article is on tensor powers of a finitely generated module over a local ring. Also, we study torsion-free modules N with the property that M ⊗R N has nonzero torsion unless M is very special. An important example of such a module N is the Frobenius power pe R over a complete intersection domain R of characteristic p > 0.