Finiteness properties of duals of local cohomology modules

被引:7
|
作者
Hellus, M. [1 ]
机构
[1] Univ Leipzig, Fak Math & Informat, D-04009 Leipzig, Germany
关键词
bass numbers; local cohomology; Matlis duality;
D O I
10.1080/00927870701512069
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
We investigate Matlis duals of local cohomology modules and prove that, in general, their zeroth Bass number with respect to the zero ideal is not finite. We also prove that, somewhat surprisingly, if we apply local cohomology again (i.e., to the Matlis dual of the local cohomology module), we get ( under certain hypotheses) either zero or E, an R-injective hull of the residue field of the local ring R.
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页码:3590 / 3602
页数:13
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