Upper bounds, cofiniteness, and artinianness of local cohomology modules defined by a pair of ideals
Let \(R\) be a commutative noetherian ring, \(I,J\) be two ideals of \(R\), \(M\) be an \(R\)-module, and \(\mathcal{S}\) be a Serre class of \(R\)-modules. A positive answer to the Huneke\(^,\)s conjecture is given for a noetherian ring \(R\) and minimax \(R\)-module \(M\) of krull dimension less t...
Saved in:
Published in | arXiv.org |
---|---|
Main Authors | , , |
Format | Paper |
Language | English |
Published |
Ithaca
Cornell University Library, arXiv.org
18.11.2012
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | Let \(R\) be a commutative noetherian ring, \(I,J\) be two ideals of \(R\), \(M\) be an \(R\)-module, and \(\mathcal{S}\) be a Serre class of \(R\)-modules. A positive answer to the Huneke\(^,\)s conjecture is given for a noetherian ring \(R\) and minimax \(R\)-module \(M\) of krull dimension less than 3, with respect to \(\mathcal{S}\). There are some results on cofiniteness and artinianness of local cohomology modules with respect to a pair of ideals. For a ZD-module \(M\) of finite krull dimension and an integer \(n\in\mathbb{N}\), if \(\lc^{i}_{I,J}(M)\in\mathcal{S}\) for all \(i>n\), then \(\lc^{i}_{I,J}(M)/\fa^{j}\lc^{i}_{I,J}(M)\in\mathcal{S}\) for any \(\fa\in\tilde{W}(I,J)\), all \(i\geq n\), and all \(j\geq0\). By introducing the concept of Seree cohomological dimension of \(M\) with respect to \((I,J)\), for an integer \(r\in\mathbb{N}_0\), \(\lc^{j}_{I,J}(R)\in\mathcal{S}\) for all \(j>r\) iff \(\lc^{j}_{I,J}(M)\in\mathcal{S}\) for all \(j>r\) and any finite \(R\)-module \(M\). |
---|---|
ISSN: | 2331-8422 |