In this article we introduce and investigate a particular class of n-perfect rings that we call
“strong n-perfect rings.” We are mainly concerned with this class of rings in the context of …

This paper unifies several generalizations of coherent rings in one notion. Namely, we
introduce nX-coherent rings, where X is a class of modules and n is a positive integer, as …

Let R be a ring. A left R-module M (resp. right R-module N) is called singly injective (resp.
singly flat) if Ext1 (F/C, M)= 0 (resp. Tor1 (N, F/C)= 0) for any cyclic submodule C of any …

Let R be a ring. We define a dimension, called P-cotorsion dimension, for modules and
rings. The aim of this article is to investigate P-cotorsion dimensions of modules and rings …

(弱)(n,d)-环以及n-凝聚环的有限直和-[维普官方网站]-www.cqvip.com-维普网  我的维普 购物车
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Let R1, R2,…, Rm be rings. It is proved that (1) mi= 1Ri is a right (n, d)-ring (resp. weak (n,
d)-ring, n-coherent ring) if and only if each Ri is a right (n, d)-ring (resp. weak (n, d)-ring, n …