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arXiv 0709.2469math.RT
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Tame代数上单参数模族个数的估计

Estimate of the number of one-parameter families of modules over a tame algebra

Thomas Brüstle, Vladimir V. Sergeichuk

摘要:

Tame代数A上的模分类问题归结为Tame型分块矩阵问题,其不可分解的典范矩阵为零参数或单参数。分别地,维数至多为d的非同构不可分解模的集合可分为有限个模f(d,A)和单参数模列。我们证明了m × n标准参数块矩阵的个数有界于4^s,其中s是自由元素的个数(最多为mn),并估计了f(d,A)的个数。

英文摘要:

The problem of classifying modules over a tame algebra A reduces to a block matrix problem of tame type whose indecomposable canonical matrices are zero- or one-parameter. Respectively, the set of nonisomorphic indecomposable modules of dimension at most d divides into a finite number f(d,A) of modules and one-parameter series of modules. We prove that the number of m-by-n canonical parametric block matrices with a given partition into blocks is bounded by 4^s, where s is the number of free entries (which is at most mn), and estimate the number f(d,A).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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