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Cofiniteness of local cohomology modules and subcategories of modules
Published 13 Jul 2023 in math.AC | (2307.06727v1)
Abstract: Let $R$ be a commutative noetherian ring and $I$ an ideal of $R$. Assume that for all integers $i$ the local cohomology module $H_Ii(R)$ is $I$-cofinite. Suppose that $R_\mathfrak{p}$ is a regular local ring for all prime ideals $\mathfrak{p}$ that do not contain $I$. In this paper, we prove that if the $I$-cofinite modules forms an abelian category, then for all finitely generated $R$-modules $M$ and all integers $i$, the local cohomology module $H_Ii(M)$ is $I$-cofinite.
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