Let R be a left and right noetherian ring and M a finitely generated left Ä-module with Ext&
(Af, R)= 0 for i^ l. Is then M reflexive? This is a stronger version of the generalized Nakayama …

We give some criteria for projectivity of reflexive modules in this paper. In the second
section, we show that a reflexive module M over a regular local ring R is free if …

For a left module M over a ring R, pd (M) and id (M) denote the projective and injective
dimension of M, respectively. A (left and right) noether ring R is called n-Gorenstein for an n> …

In case A has finite Krull-dimension, say d, it is well-known by Bass [2] that A is a Gorenstein
ring if and only if ExtiA (M, A)=(0) for every finitely generated A-module M and for every …

Introduction. The aim of this paper is to show the relevance of a class of commutative
noetherian rings to the study of reflexive modules. They include integrally closed domains …

In this note, we ask when the class of all finitely generated reflexive (torsionless) left
modules is closed under extensions. This is not always the case, even if R is left and right …

Let R be a commutative Noetherian ring and let C be a semidualizing R-module. It is shown
that a finitely generated R-module M with finite GC-dimension is C-reflexive if and only if M 𝔭 …

Let R be a commutative Noetherian ring. It is shown that the finitely generated R-module M
with finite Gorenstein dimension is reflexive if and only if M p is reflexive for p∈ Spec (R) …

We will study modules of the highest injective, projective and flat dimension over a
Goresntein ring. Let R be a Gorenstein ring of self-injective dimension n and 0–RR→ E0 …

The aim of this paper is to characterize $ n $-Gorenstein rings in terms of Gorenstein
injective modules and the Ext functor. We will show that if $ R $ is a left and right noetherian …