Rings Related to Mininjective and Min-Flat Modules

Rings Related to Mininjective and Min-Flat Modules
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DOI:
10.1080/00927870902828504
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发表时间:
2009-10
影响因子:
0.7
通讯作者:
L. Mao
L. Mao
中科院分区:
数学3区
文献类型:
--
作者:
L. Mao

文献摘要

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R称为左PS (resp)。如果每一个简单的左理想是射影的,则左最小相干,左普遍最小内射环。有限表示,R的直接和。我们首先研究了模的自同态环是PS环、最小相干环还是普遍最小内射环。然后利用微内射模和微平面模的自同态对PS环和一般微内射环进行了刻画。最后,利用特殊模的同态模的性质研究了交换最小相干环和(普遍)最小内射环。
R is called a left PS (resp. left min-coherent, left universally mininjective) ring if every simple left ideal is projective (resp. finitely presented, a direct summand of R). We first investigate when the endomorphism ring of a module is a PS ring, a min-coherent ring, or a universally mininjective ring. Then we characterize PS rings and universally mininjective rings in terms of endomorphisms of mininjective and min-flat modules. Finally, we study commutative min-coherent rings and (universally) mininjective rings using properties of homomorphism modules of special modules.