共查询到20条相似文献,搜索用时 500 毫秒
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主左理想由若干个幂等元生成的环 总被引:1,自引:0,他引:1
环R称为左PI-环,是指R的每个主左理想由有限个幂等元生成.本文的主要目的是研究左PI-环的von Neumann正则性,证明了如下主要结果:(1)环R是Artin半单的当且仅当R是正交有限的左PI-环;(2)环R是强正则的当且仅当R是左PI-环,且对于R的每个素理想P,R/P是除环;(3)环R是正则的且R的每个左本原商环是Artin的当且仅当R是左PI-环且R的每个左本原商环是Artin的;(4)环R是左自内射正则环且Soc(RR)≠0当且仅当R是左PI-环且它包含内射极大左理想;(5)环R是MELT正则环当且仅当R是MELT左PI-环. 相似文献
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Artin模的自同态环 总被引:1,自引:0,他引:1
武同锁 《数学年刊A辑(中文版)》1995,(2)
本文讨论Artin模的自同态环何时为半完全环的问题.对于Artin模MR,本文证明了:(1)若M是非单的直和不可分解模,则socM为见的小子模;(2)对任意Artin模M及任意Artin半单模L,EndR(ML)为半完全环的充要条件为EndR(M)是半完全环.本文还证明了(直和不可分解的)拟投射Artin模的自同态环为(局部环)半准素环.而对于非零的Artin投射模P,“P直和不可分解”等价于“P和不可分解”. 相似文献
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关于SF-环的几点注记 总被引:3,自引:0,他引:3
本文中,我们证明了如下主要结果:Ⅰ 对于环R,下面条件是等价的:(1)R是Artin半单环;(2)R是左SF-环,且R满足特殊右零化于降链条件;(3)R是左SF-环和I-环,且R ̄R具有有限Goldie维数。Ⅱ对于环R,下面条件是等价的:(1)R是VonNeumann正则环;(2)R是左SF-环,且每个苛异循环左R-模的极大子模是平坦的。 相似文献
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关于SF—环的几点注记 总被引:1,自引:0,他引:1
文中,我们证明了如下主要结果:Ⅰ对于环R,下面条件是等价的:(1)R是Artin半单环;(2)R是左SF-环,且R满足特殊右零化子降链条件;(3)R是左SF-环和Ⅰ-环,且R^R具有有限Goldie维数。Ⅱ对于环R,下面条件是等价:(1)R是Von Neumann正则环;(2)R是左SF-环,且每个奇异循环左R-模的极大子模是平坦的。 相似文献
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本文的目的是讨论环R何时成为一个半单Ariin环的极大Order问题,得到了主要结果是:若R是左和右Noether半索环,P是R的包含在Jacobson根中的可逆理想,使得R/P是一个半单Artin环的极大Order,则R是一个半单Artin环的极大Order。 相似文献
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本文证明,如果R是一个Noether完备半局部环,则R-模M是Noether(Artin)模当且仅当对任意ArtinR-模N,是Artin(Noether)模. 相似文献
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文章证明了:如果R或要为本原Artin的Exchange环,则Mn(R)≌(S)当且仅当R≌S。 相似文献
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本文证明,如果R是一个Noether完备半局部环,则R-模M是Noether(Artin)模当且仅当对任意ArtinR-模N,Hom R(M, N)是Artin(Noether)模. 相似文献
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关于半交换环与强正则环 总被引:1,自引:0,他引:1
本文得到了环R是强正则环的若干充分必要条件,证明了下面条件是等价的:(1)R是强正则的;(2)R是半交换正则的;(3)R是半交换的左SF-环;(4)R是半交换的ELT环,且使得每个单左R-模是P-内射的或者平坦的;(5)R是半交换右非奇异的左SF-环;(6)R是半素的半交换左(或右)P-内射环. 相似文献
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In this article, we investigate when every simple module has a projective (pre)envelope. It is proven that (1) every simple right R-module has a projective preenvelope if and only if the left annihilator of every maximal right ideal of R is finitely generated; (2) every simple right R-module has an epic projective envelope if and only if R is a right PS ring; (3) Every simple right R-module has a monic projective preenvelope if and only if R is a right Kasch ring and the left annihilator of every maximal right ideal of R is finitely generated. 相似文献
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von Neumann Regular Rings and Right SF-rings 总被引:2,自引:0,他引:2
A ring R is called a left (right) SF-ring if all simple left (right) R-modules are flat. It is known that von Neumann regular rings are left and right SF-rings. In this paper, we study the regularity of right SF-rings and prove that if R is a right SF-ring whose all maximal (essential) right ideals are GW-ideals, then R is regular. 相似文献
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本文给出了R为m-fold稳定环的若干充分必要条件,证明了整闭整环的Kronecker函数环m-fold稳定环,进一步地,得到了左(右)拟DUO替换环为m-fold稳定环的条件。 相似文献
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Let R denote a right principally injective ring. In this note we show that if R is right duo then R is right finite dimensional if and only if R has a finite number of maximal left ideals. This extends and answers an open question of Camillo. If, instead, every simple right module can be embedded in R, we show that R is left finite dimensional if it has a finite number of maximal right ideals. 相似文献
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本文的主要目的是考虑强Morphic环D上的矩阵尾环R[D]的Morphic性质。本文讨论了类似尾环的一些性质。证明了:R[D]是强左Morphic环当且仅当R[D]是左Morphic环当且仅当D是强左Morphic环。本文还构造了一些例子来说明问题。 相似文献
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V. V. Bavula 《代数通讯》2017,45(9):3798-3815
A new class of rings, the class of weakly left localizable rings, is introduced. A ring R is called weakly left localizable if each non-nilpotent element of R is invertible in some left localization S?1R of the ring R. Explicit criteria are given for a ring to be a weakly left localizable ring provided the ring has only finitely many maximal left denominator sets (eg, this is the case for all left Noetherian rings). It is proved that a ring with finitely many maximal left denominator sets that satisfies some natural conditions is a weakly left localizable ring iff its left quotient ring is a direct product of finitely many local rings such that their radicals are nil ideals. 相似文献
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In this article we investigate the transfer of the notions of elementary divisor ring, Hermite ring, Bezout ring, and arithmetical ring to trivial ring extensions of commutative rings by modules. Namely, we prove that the trivial ring extension R: = A ? B defined by extension of integral domains is an elementary divisor ring if and only if A is an elementary divisor ring and B = qf(A); and R is an Hermite ring if and only if R is a Bezout ring if and only if A is a Bezout domain and qf(A) = B. We provide necessary and sufficient conditions for R = A ? E to be an arithmetical ring when E is a nontorsion or a finitely generated A ? module. As an immediate consequences, we show that A ? A is an arithmetical ring if and only if A is a von Neumann regular ring, and A ? Q(A) is an arithmetical ring if and only if A is a semihereditary ring. 相似文献