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Amir Mafi

Amir Mafi

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

Research

Title
Cofinite modules and generalized local cohomology
Type
JournalPaper
Keywords
Generalized local cohomology modules_ Co nite modules.
Year
2009
Journal To appear in Houston J. Math
DOI
Researchers Amir Mafi ، Hero Saremi

Abstract

Let R be a commutative Noetherian ring, a an ideal of R, and M, N two nitely generated R-modules. We prove that the generalized local cohomology modules Ht a(M;N) are a-co nite; that is, Exti R(R=a;Ht a(M;N)) is nitely generated for all i; t  0, in the following cases: (i) cd(a) = 1, where cd is the cohomological dimension of a in R. (ii) dimR  2. Additionally, we show that if cd(a) = 1 then Exti R(M;Ht a(N)) is a-co nite for all i; t  0.