Abstract
Let be an associative ring with identity and be a left -module. In this paper, we introduce -Gorenstein injective modules as a generalization of Gorenstein injective modules. We verify some properties of -Gorenstein injective modules analogous to those holding for Gorenstein injective modules. There is an interesting theorem in classical homological algebra which asserts that is a Noetherian ring if and only if the class of injective modules over is closed under arbitrary direct sum. Our goal in this paper is to investigate the -Gorenstein injective counterpart of this fact. If the class of -Gorenstein injective modules over is closed under arbitrary direct sum, then will be a Noetherian ring. Also, it has been proved that in the special case , when is a commutative Noetherian ring with a dualizing complex, then the class of -Gorenstein injective modules is closed under arbitrary direct sum. In the main theorem of this paper, we prove the general case of this result. More precisely, we show that for any left -module over a Noetherian ring in which every -module has finite -Gorenstein injective dimension, the class of -Gorenstein injective modules is closed under arbitrary direct sum.
Citation
Fatemeh Mohammadi Aghjeh Mashhad. "A generalization of Gorenstein injective modules." Tbilisi Math. J. 14 (3) 225 - 234, August 2021. https://doi.org/10.32513/tmj/19322008156
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