Let R be a commutative noetherian ring. Denote by R the category of finitely generated R-modules. In this paper, we study n-torsionfree modules in the sense of Auslander and Bridger, by comparing them with n-syzygy modules, and modules satisfying Serre's condition (S-n). We mainly investigate closedness properties of the full subcategories of R consisting of those modules.
机构:
Anhui Univ, Sch Math Sci, Ctr Pure Math, Hefei 230601, Anhui, Peoples R ChinaAnhui Univ, Sch Math Sci, Ctr Pure Math, Hefei 230601, Anhui, Peoples R China