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Proceedings of the American Mathematical Society
Proceedings of the American Mathematical Society
ISSN 1088-6826(e) ISSN 0002-9939(p)

     

On the finiteness properties of extension and torsion functors of local cohomology modules

Author(s): Kazem Khashyarmanesh
Journal: Proc. Amer. Math. Soc. 135 (2007), 1319-1327.
MSC (2000): Primary 13D45, 13D07
Posted: December 27, 2006
MathSciNet review: 2276640
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Abstract | References | Similar articles | Additional information

Abstract: Let $ R$ be a commutative Noetherian ring with non-zero identity, $ \mathfrak{a}$ and $ \mathfrak{b}$ ideals of $ R$ with $ \mathfrak{a} \subseteq \mathfrak{b}$, and $ M$ a finitely generated $ R$-module. In this paper, for fixed integers $ j$ and $ n$, we study the finiteness of $ \operatorname{Ext}^j_R(R/\mathfrak{b},H^n_{\mathfrak{a}}(M))$ and $ Tor_j^R(R/\mathfrak{b},H^n_{\mathfrak{a}}(M))$ in several cases.


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Additional Information:

DOI: 10.1090/S0002-9939-06-08664-3
PII: S 0002-9939(06)08664-3
Keywords: Local cohomology modules, extension functor, torsion functor, cofinite modules, associated primes, cohomological dimension, coassociated primes, filter regular sequences.
Received by editor(s): November 2, 2005
Received by editor(s) in revised form: February 2, 2006
Posted: December 27, 2006
Additional Notes: The author was partially supported by a grant from the Institute for Studies in Theoretical Physics and Mathematics (IPM) Iran (No. 84130025).
Communicated by: Bernd Ulrich
Copyright of article: Copyright 2006, American Mathematical Society
The copyright for this article reverts to public domain after 28 years from publication.




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