An Extension of a Depth Inequality of Auslander
An Extension of a Depth Inequality of Auslander
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DOI:
10.11650/tjm/220501
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发表时间:
2021-08
影响因子:
0.4
通讯作者:
Olgur Celikbas;U. Le;H. Matsui
中科院分区:
文献类型:
--
作者:
Olgur Celikbas;U. Le;H. Matsui
In this paper, we consider a depth inequality of Auslander which holds for finitely generated Tor-rigid modules over commutative Noetherian local rings. We raise the question of whether such a depth inequality can be extended for $n$-Tor-rigid modules, and obtain an affirmative answer for 2-Tor-rigid modules that are generically free. Furthermore, in the appendix, we use Dao's eta function and determine new classes of Tor-rigid modules over hypersurfaces that are quotient of unramified regular local rings.