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Mat. Zametki, 2021 Volume 109, Issue 3, Pages 335–346 (Mi mzm13057)

Papers published in the English version of the journal

Some Finiteness Results for Local Cohomology Modules with Respect to a Pair of Ideals

Batoul Naal, Kazem Khashyarmanesh

Department of Pure Mathematics, Faculty of Mathematical Sciences and Center of Excellence in Analysis on Algebraic Structures, Ferdowsi University of Mashhad, Mashhad, 1159-91775 Iran

Abstract: Suppose that $R$ is a commutative Noetherian ring with identity, $I$, $J$ are ideals of $R$, and let $M$ be a finitely generated $R$-module. Let $H^i_{I,J}(-)$ be the $i$th local cohomology functor with respect to $(I, J)$. In this paper, we show that the $R$-module
$$\mathrm{Hom}_R(R/I,H^1_{I,J}(M)/JH^1_{I,J}(M))$$
is always finitely generated. Moreover, we provide sufficient conditions such that the modules
$$ \mathrm{Hom}_R(R/I,H^i_{I,J}(M)/JH^i_{I,J}(M)) \qquad \mathrm{or} \qquad \mathrm{Tor}^R_j(R/I,H^i_{I,J}(M)/JH^i_{I,J}(M)) $$
is finitely generated.

Keywords: local cohomology with respect to a pair of ideals, associated prime ideals, filter regular element.

Received: 03.04.2020
Revised: 16.09.2020

Language: English


 English version:
Mathematical Notes, 2021, 109:3, 335–346

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© Steklov Math. Inst. of RAS, 2024