On the Cofiniteness of Certain Local Cohomology Modules for a Pair of Ideals

VNU Journal of Science: Mathematics - Physics - Tập 40 Số 4 - Trang - 2024
Nguyen Van Hoang1
1University of Transport and Communications

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.

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