Cohomological supports of tensor products of modules over commutative rings

Cohomological supports of tensor products of modules over commutative rings
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交换环上模张量积的上同调支持

DOI:
10.1007/s40687-022-00321-7
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发表时间:
2022
影响因子:
1.2
通讯作者:
Sanders, William T.
Sanders, William T.
中科院分区:
数学3区
文献类型:
--
作者:
Iyengar, Srikanth B.;Pollitz, Josh;Sanders, William T.

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本文研究交换局部环上模的上同调支集簇。主要结果是:Koszul复形上的一对微分分次模的导张量积的支集是这对模的支集的并。这推广,并给出另一个证明,一个结果道和第三作者处理托尔独立模完全交环。Koszul复形的结果具有更广泛的适用性,包括局部环上的外代数。
This works concerns cohomological support varieties of modules over commutative local rings. The main result is that the support of a derived tensor product of a pair of differential graded modules over a Koszul complex is the join of the supports of the modules. This generalizes, and gives another proof of, a result of Dao and the third author dealing with Tor-independent modules over complete intersection rings. The result for Koszul complexes has a broader applicability, including to exterior algebras over local rings.
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