Stability of Gorenstein X-flat modules


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Abstract

In this paper we introduce the notion of Gorenstein X-flat R-module and study a kind of stability of the class of Gorenstein X-flat R-modules. A ring R is called right GXF-closed if the class of all Gorenstein X-flat right R-modules is closed under extensions. We give an answer for the following natural question in the setting of a right GXF-closed ring R: Given an exact sequence of Gorenstein X-flat right R-modules G = · · ·→G1G0G0G1 →· · · such that the complex GRH is exact for each Gorenstein X-injective left R-module H, is themodule M:= im(G0G0) a Gorenstein X-flat R-module?

About the authors

C. Selvaraj

Department of Mathematics

Author for correspondence.
Email: selvavlr@yahoo.com
India, Salem Tamil Nadu, 636 011

A. Umamaheswaran

Department of Mathematics

Email: selvavlr@yahoo.com
India, Salem Tamil Nadu, 636 011


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