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Fahimeh Khosh-Ahang Ghasr

Academic rank: Associate Professor
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Education: PhD.
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HIndex: 0/00
Faculty: Basic Science
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Research

Title
When Are the Local Cohomology Modules Finitely Generated?
Type
JournalPaper
Keywords
Cofinite modules; Cohomological annihilators; Cohomological dimension; Local cohomology modules.
Year
2007
Journal COMMUNICATIONS IN ALGEBRA
DOI
Researchers Kazem Khashyarmanesh ، Fahimeh Khosh-Ahang Ghasr

Abstract

Let R be a commutative Noetherian ring,  an ideal of R, and M an R-module. We prove that for a fixed non-negative integer n, the nth local cohomology module Hn  M is finitely generated if and only if Hn  M is -cofinite and  ⊆  0 R Hn  M. This enables us to establish the Noetherian property of local cohomology modules in several cases. Finally, we obtain a new characterization of the cohomological dimensions.