Extensions over hereditary Artinian rings with self-dualities, I

Extensions over hereditary Artinian rings with self-dualities, I
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具有自对偶性的遗传性阿提尼安环的延伸,我

DOI:
10.1016/0021-8693(81)90329-x
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发表时间:
1981
期刊:
影响因子:
0.9
通讯作者:
K. Yamagata
K. Yamagata
中科院分区:
数学3区
文献类型:
--
作者:
K. Yamagata

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本文研究了具有自(Morita)对偶的Artin环上任意扩张上的非生成不可分解模。设A是一个具有自对偶的Artin环,T是A上的扩张,其核为Q(见[11],Chap. XIV,Sect.21)使得QA和AQ分别同构于top(A,)和topLA)的内射壳。这样的A-模Q称为拟弗罗贝纽斯。证明了(1)T是拟Frobenius环。(2)如果A是有限表示型的,并且是遗传的,则T也是有限表示型的.在这种情况下,利用模T中的几乎可裂序列,每个模T生成的不可分解非投射T-模都是由模T生成的不可分解投射A-模和模T生成的不可分解内射A-模构造的.
In this paper we study the finitely generated indecomposable modules over an arbitrary extension over an Artinian ring with self-(Morita) duality. Let A be an Artinian ring with self-duality and T an extension over A with kernel Q (see [11, Chap. XIV, Sect. 21) such that QA and AQ are isomorphic to injective hulls of top (A,) and topLA), respectively. Such an A-module Q will be called quasi-Frobenius. Then it will be proved that (1) T is a quasi-Frobenius ring.(2) If A is of ftnite representation type and hereditary, then T is also of finite representation type. In this case, making use of almost split sequences in mod T, every finitely generated indecomposable nonprojective T-module is constructed from a finitely generated indecomposable projective A-module and, simultaneously from a finitely generated indecomposable injective A-module.
代数中最接近的结合代数
DOI: --
发表时间: 2008
期刊:
影响因子: --
作者:
末信郁也;久保富士男
通讯作者: 久保富士男