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Amir Mafi

Amir Mafi

Academic rank: Professor
ORCID:
Education: PhD.
ScopusId: 14627657300
Faculty: Faculty of Science
Address:
Phone: 33624133

Research

Title
Artinianness of composed local cohomology modules
Type
Presentation
Keywords
Generalized local cohomology, Artinian modules
Year
2014
Researchers Amir Mafi ، Hero Saremi

Abstract

\begin{abstract} Let $R$ be a commutative Noetherian ring and let $\fa$, $\fb$ be two ideals of $R$ such that $R/({\fa+\fb})$ is Artinian. Let $M$, $N$ be two finitely generated $R$-modules. We prove that $H_{\fb}^j(H_{\fa}^t(M,N))$ is Artinian for $j=0,1$, where $t=\inf\{i\in{\mathbb{N}_0}: H_{\fa}^i(M,N)$ is not finitely generated $\}$. Also, we prove that if $\Dim\Supp(H_{\fa}^i(M,N))\leq 2$, then $H_{\fb}^1(H_{\fa}^i(M,N))$ is Artinian for all $i$. Moreover, we show that if $\dim N=d$, then $H_{\fb}^j(H_{\fa}^{d-1}(N))$ is Artinian for all $j\geq 1$. \end{abstract}