Asymptotic behaviour of graded local cohomology modules via linkage

Assume that $R=\oplus_{n\in \mathbb{N}_0}R_n$ is a standard graded algebra over the local ring $(R_0,\mathfrak{m}_0)$, $\mathfrak{a}$ is a homogeneous ideal of $R$, $M$ is a finitely generated graded $R$-module and $R_+:=\oplus_{n\in \mathbb{N}}R_n$ denotes the irrelevant ideal of $R$. In this paper...

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Hauptverfasser: Jahangiri, Maryam, Nadali, Azadeh, Sayyari, Khadijeh
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Sprache:eng
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Zusammenfassung:Assume that $R=\oplus_{n\in \mathbb{N}_0}R_n$ is a standard graded algebra over the local ring $(R_0,\mathfrak{m}_0)$, $\mathfrak{a}$ is a homogeneous ideal of $R$, $M$ is a finitely generated graded $R$-module and $R_+:=\oplus_{n\in \mathbb{N}}R_n$ denotes the irrelevant ideal of $R$. In this paper, we study the asymptotic behaviour of the set $\{ \operatorname{grade}(\mathfrak{a} \cap R_0, H^{\operatorname{grade}(R_+,M)}_{R_+}(M)_n) \}_{n \in \mathbb{Z}}$ as $n \rightarrow -\infty$, in the case where $\mathfrak{a}$ and $R_+$ are homogenously linked over $M$.
DOI:10.48550/arxiv.2108.12703