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Moharram Aghapournahr

Moharram Aghapournahr

Academic rank: Associate Professor
ORCID: https://orcid.org/0000-0002-8265-9700
Education: PhD.
ScopusId: 24179345700
HIndex:
Faculty: Science
Address: Arak University
Phone:

Research

Title
A characterization of cominimax and weakly cofinite modules
Type
JournalPaper
Keywords
Cofinite module, Cominimax module, Weakly cofinite module, Weakly Laskerian module, minimax module
Year
2020
Journal Communications in Algebra
DOI
Researchers Moharram Aghapournahr ، KAMAL BAHMANPOUR

Abstract

ABSTRACT Let R be a commutative Noetherian ring and I be an ideal of R. Let M be an arbitrary R-module. In this paper we establish some results concerning the cofiniteness properties of modules. It is shown that, M is I-cominimax if and only if there is an ideal J  I with dimR=J 0 such that M is ðI, VðJÞÞ-cofinite and the R-module Ext iR ðR=J, MÞ is finitely generated, for each i ! 0: Moreover, it is shown that M is I-weakly cofinite if and only if there is an ideal J  I such that V(J) is a finite set and M is ðI, VðJÞÞ-cofinite.