arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2301.02635math.AC
收藏

具有q-挠自由标准模的环

Rings with q-torsionfree canonical modules

Naoki Endo, Laura Ghezzi, Shiro Goto, Jooyoun Hong, Shin-Ichiro Iai, Toshinori Kobayashi, Naoyuki Matsuoka, Ryo Takahashi

摘要:

设A是具有标准模K的Noether局部环.当K是无挠、自反或q-挠自由模时,我们刻画A。若A是Cohen-Macaulay环,则H. B. Foxby在1974年证明了A-模K是q-挠自由的当且仅当环A是q-Gorenstein的。在适当的假设下,我们将Foxby的结果推广到了任意的Noether局部环中.特别地,由于正则模的自反性与低余维的Gorenstein环密切相关,我们还探讨了由W. V. Vasconcelos。我们也提供了几个例子。

英文摘要:

Let A be a Noetherian local ring with canonical module K. We characterize A when K is a torsionless, reflexive, or q-torsionfree module. If A is a Cohen-Macaulay ring, H.-B. Foxby proved in 1974 that the A-module K is q-torsionfree if and only if the ring A is q-Gorenstein. With mild assumptions, we provide a generalization of Foxby's result to arbitrary Noetherian local rings admitting the canonical module. In particular, since the reflexivity of the canonical module is closely related to the ring being Gorenstein in low codimension, we also explore quasi-normal rings, introduced by W. V. Vasconcelos. We provide several examples as well.

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。

↑