Splitting off free summands of torsion-free modules over complete DVRs
Splitting off free summands of torsion-free modules over complete DVRs
复制标题
将无扭模块的自由加数拆分到完整的 DVR 上
DOI:
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发表时间:
2002
影响因子:
0.5
通讯作者:
Agnes T. Paras
中科院分区:
文献类型:
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作者:
R. Göbel;Agnes T. Paras
If R is a complete discrete valuation ring and M is a reduced, torsion-free R-module of rank kappa, where aleph_0 leq kappa < 2^ (aleph_0), we show that M propoplus_(aleph_0) R oplus C for some R-module C. As a consequence, it must be the case that M prop M oplus (oplus{_alpha}R), where alpha leq aleph_0, and {
m (End)_R}M/
m (Fin)M has rank at least 2^ (aleph_0), where Fin M denotes the set of endomorphisms of M with finite rank image.