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
影响因子:
0.9
通讯作者:
K. Yamagata
中科院分区:
文献类型:
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作者:
K. Yamagata
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.
DOI:
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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