Publications Meetings The Profession Membership Programs Math Samplings Policy & Advocacy In the News About the AMS
|
   
Available in electronic format
Available in print format
Proceedings of the American Mathematical Society
Proceedings of the American Mathematical Society
ISSN 1088-6826(e) ISSN 0002-9939(p)

     

Local cohomology modules with infinite dimensional socles

Author(s): Thomas Marley; Janet C. Vassilev
Journal: Proc. Amer. Math. Soc. 132 (2004), 3485-3490.
MSC (2000): Primary 13D45
Posted: July 22, 2004
MathSciNet review: 2084068
Retrieve article in: PDF
This article is available free of charge

Abstract | References | Similar articles | Additional information

Abstract: In this paper we prove the following generalization of a result of Hartshorne: Let $T$ be a commutative Noetherian local ring of dimension at least two, $R=T[x_1,\dots,x_n]$, and $I=(x_1,\ldots,x_n)$. Let $f$ be a homogeneous element of $R$ such that the coefficients of $f$ form a system of parameters for $T$. Then the socle of $H^n_I(R/fR)$ is infinite dimensional.


References:

[BKS]

Brodmann, M., Katzman, M. and Sharp, R., Associated primes of graded component of local cohomology modules, Trans. Amer. Math. Soc., 354, 4261-4283 (2002). MR 1926875 (2003h:13020)

[BS]
Brodmann, M. and Sharp, R., Local Cohomology: an algebraic introduction with geometric applications, Cambridge Studies in Advanced Mathematics no. 60, Cambridge, Cambridge University Press, 1998. MR 1613627 (99h:13020)

[BH]
Bruns, W. and Herzog, J., Cohen-Macaulay Rings, Cambridge Studies in Advanced Mathematics no. 39, Cambridge, Cambridge University Press, 1993. MR 1251956 (95h:13020)

[BE]
Buchsbaum, D. and Eisenbud, D., What annihilates a module?, J. Algebra 47, 231-243 (1977). MR 0476736 (57:16293)

[DM]
Delfino, D. and Marley, T., Cofinite modules and local cohomology, J. Pure Appl. Algebra 121, 45-52 (1997). MR 1471123 (98g:13015)

[Ha]
Hartshorne, R., Affine Duality and Cofiniteness, Invent. Math. 9, 145-164 (1970). MR 0257096 (41:1750)

[HM]
Helm, D. and Miller, E., Bass numbers of semigroup-graded local cohomology, Pacific J. Math. 209, 41-66 (2003). MR 1973933 (2004c:13028)

[Hu]
Huneke, C., Problems on local cohomology, Free Resolutions in commutative algebra and algebraic geometry (Sundance, Utah, 1990), Research Notes in Mathematics 2, Boston, MA, Jones and Bartlett Publishers, 1994, 993-108. MR 1165313 (92m:13001)

[HK]
Huneke, C. and Koh, J., Cofiniteness and vanishing of local cohomology modules, Math. Proc. Cambridge Philos. Soc. 110, 421-429 (1991). MR 1120477 (92g:13021)

[HS]
Huneke, C. and Sharp, R., Bass Numbers of local cohomology modules, Trans. Amer. Math. Soc. 339, 765-779 (1993). MR 1124167 (93m:13008)

[Ka]
Katzman, M., An example of an infinite set of associated primes of a local cohomology module, J. Algebra, 252, 161-166 (2002). MR 1922391 (2003h:13021)

[KS]
Katzman, M. and Sharp, R., Some properties of top graded local cohomology modules, J. Algebra 259, 599-612 (2003). MR 1955534 (2004a:13011)

[L1]
Lyubeznik, G., Finiteness Properties of local cohomology modules (An application of $D$-modules to commutative algebra), Invent. Math. 113, 41-55 (1993). MR 1223223 (94e:13032)

[L2]
Lyubeznik, G., Finiteness properties of local cohomology modules for regular local rings of mixed characteristic: The unramified case, Comm. Algebra 28 no. 12, 5867-5882 (2000). MR 1808608 (2002b:13028)

[MV]
Marley, T. and Vassilev, J., Cofiniteness and associated primes of local cohomology modules, J. Algebra 256, 180-193 (2002). MR 1936885 (2003j:13025)

[Mat]
Matsumura, H., Commutative Ring Theory, Cambridge Studies in Advanced Mathematics no. 8, Cambridge, Cambridge University Press, 1986. MR 0879273 (88h:13001)


Similar Articles:

Retrieve articles in Proceedings of the American Mathematical Society with MSC (2000): 13D45

Retrieve articles in all Journals with MSC (2000): 13D45


Additional Information:

Thomas Marley
Affiliation: Department of Mathematics, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0323
Email: tmarley@math.unl.edu

Janet C. Vassilev
Affiliation: Department of Mathematical Sciences, University of Arkansas, Fayetteville, Arkan- sas 72701
Email: jvassil@uark.edu

DOI: 10.1090/S0002-9939-04-07658-0
PII: S 0002-9939(04)07658-0
Keywords: Local cohomology
Received by editor(s): July 16, 2003
Posted: July 22, 2004
Additional Notes: The first author was partially supported by NSF grant DMS-0071008.
Communicated by: Bernd Ulrich
Copyright of article: Copyright 2004, American Mathematical Society
The copyright for this article reverts to public domain after 28 years from publication.




AMS and Social Media LinkedIn Facebook Podcasts Twitter YouTube RSS Feeds Blogs Wikipedia