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
中科院分区:
文献类型:
--
作者:
Olgur Celikbas;S. Iyengar;Greg Piepmeyer;R. Wiegand
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.