Exterior powers and Tor-persistence
Exterior powers and Tor-persistence
复制标题
外部权力和 Tor 持久性
DOI:
10.1016/j.jpaa.2021.106890
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发表时间:
2022
影响因子:
0.8
通讯作者:
Sather-Wagstaff, Keri
中科院分区:
文献类型:
--
作者:
Lyle, Justin;Montaño, Jonathan;Sather-Wagstaff, Keri
A commutative Noetherian ring R is said to be Tor-persistent if, for any finitely generated R-module M, the vanishing of Tor i R (M, M) for i≫ 0 implies M has finite projective dimension. An open question of Avramov, et al. asks whether any such R is Tor-persistent. In this work, we exploit properties of exterior powers of modules and complexes to provide several partial answers to this question; in particular, we show that every local ring (R, m) with m 3= 0 is Tor-persistent. As a consequence of our methods, we provide a new proof of the Tachikawa Conjecture for positively graded rings over a field of characteristic different from 2.
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影响因子:
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David A. Jorgensen
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Q. Zeng
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