Rings satisfying every finitely generated module has a Gorenstein projective (pre)envelope

Rings satisfying every finitely generated module has a Gorenstein projective (pre)envelope
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满足每个有限生成模块的环具有 Gorenstein 投影(预)包络

DOI:
10.1080/00927872.2017.1365880
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发表时间:
2018-05
影响因子:
0.7
通讯作者:
Lixin Mao
Lixin Mao
中科院分区:
数学3区
文献类型:
--
作者:
Lixin Mao

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设R是一个环。引入了Gorenstein f-投射R-模的概念,得到了Gorenstein f-投射R-模的一些闭包性质。因此,我们讨论了当每个有限生成的R-模都有有限生成的Gorenstein投射(Pre)包络的时候。例如,我们证明了每个有限生成(左和右)R-模有一个有限生成Gorenstein投射预包当且仅当R是一个双边凝聚环,并且对每个有限生成(左和右)R-模M有一个有限生成Gorenstein投射预覆盖。
ABSTRACT Let R be a ring. We introduce the concept of Gorenstein f-projective R-modules and obtain some closure properties of Gorenstein f-projective R-modules. As a consequence, we discuss when every finitely generated R-module has a finitely generated Gorenstein projective (pre)envelope. For example, we prove that every finitely generated (left and right) R-module has a finitely generated Gorenstein projective preenvelope if and only if R is a two-sided coherent ring and has a finitely generated Gorenstein projective precover for every finitely generated (left and right) R-module M.
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