On the Cofiniteness of Certain Local Cohomology Modules for a Pair of Ideals
Tóm tắt
Let be non-negative integers and be an -module such that is finitely generated for all and for all , where is a class of modules. We hence prove that (1) if then is -cofinite for all ; (2) if and is finitely generated for all , then is -cofinite for all . These extend the results of Khazaei-Sazeedeh [10, Thm 2.10, Thm 2.11] for local cohomology modules for a pair of ideals. Finally, we prove that is -cofinite for all whenever is principal, is an -module satisfying is finitely generated for all , and is in dimension . This extends a theorem [13, Thm 1] of Kawasaki.