Weakly cofiniteness of local cohomology modules
Commutative Algebra
2017-07-24 v1
Abstract
Let be a commutative Noetherian ring, a system of ideals of and . Let be an -module (not necessary -torsion) such that , then the -module is weakly Laskerian, for all , if and only if the -module is weakly Laskerian, for . Let be an integer and an -module such that is weakly Laskerian for all . We prove that if the -module is for all , then is -weakly cofinite for all and for any (or minimax) submodule of , the -modules and are weakly Laskerian. Let be a finitely generated -module. We also prove that and are -weakly cofinite for all and whenever is weakly Laskerian and is for all . Similar results are true for ordinary local cohomology modules and local cohomology modules defined by a pair of ideals.
Cite
@article{arxiv.1707.06795,
title = {Weakly cofiniteness of local cohomology modules},
author = {Moharram Aghapournahr},
journal= {arXiv preprint arXiv:1707.06795},
year = {2017}
}
Comments
16 pages