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ON THE FINITE TYPE OF FAMILIES OF INDECOMPOSABLE MODULES

机译:关于不可分解模块的有限型

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We show that a family C = {M_i|i ∈I} of indecomposable modules has only a finite number of non-isomorphic members if C satisfies either of the following: (a) C has a preinjective partition, and satisfies the artinian condition on morphisms between the M_i; (b) C has a preprojective partition, and satisfies the noetherian condition on morphisms between the M_i. As a consequence, we recover some of recent results due to B. Huisgen-Zimmermann and M. Saorin [11], establishing the relationships between the endo-structure of infinite direct sums ?_(i∈I) M_i of indecomposable modules M_i and the finiteness of isomorphism classes of the M_i.
机译:我们证明,如果C满足以下任一条件,则不可分解模块的族C = {M_i | i∈I}仅具有有限数量的非同构成员:(a)C具有预射手分区,并且满足M_i之间的态射; (b)C具有投影前分区,并且满足M_i之间的态射的noetherian条件。结果,我们恢复了B. Huisgen-Zimmermann和M. Saorin [11]的一些最新结果,建立了不可分解模M_i和M_i的无限直接和?_(i∈I)M_i的内在结构之间的关系。 M_i同构类的有限性。

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