Top Local Cohomology Modules Are Almost Always Non-Artinian
V. Erdoǧdu, Tuğba Yıldırım
Abstract
Open-access reader
V. Erdoǧdu, Tuğba Yıldırım
Abstract
Open-access reader
Let $(R,\mathfrak m)$ be a Noetherian local ring, $I$ an ideal of $R$ and $M$ a weakly finite or a coatomic $R$-module of dimension $n$. In this article, we resolve the Artinianness and non-Artinianness of top local cohomology modules, $H^{cd(I,M)}_I(M)$, in all cases except in the case $cd(I,M)=n-1$ and $dim(R/{I+Ann(M)})>1$ for which we have some sorter results under certain conditions.
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Let $(R,\mathfrak m)$ be a Noetherian local ring, $I$ an ideal of $R$ and $M$ a weakly finite or a coatomic $R$-module of dimension $n$. In this article, we resolve the Artinianness and non-Artinianness of top local cohomology modules, $H^{cd(I,M)}_I(M)$, in all cases except in the case $cd(I,M)=n-1$ and $dim(R/{I+Ann(M)})>1$ for which we have some sorter results under certain conditions.
Key concepts: Local cohomology, Mathematics, Local ring, Noetherian ring, Noetherian, Ideal (ethics), Dimension (graph theory), Pure mathematics