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arXiv 1202.4803math.CT
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$t$ -遗传范畴的结构

$t$-structures for hereditary categories

Donald Stanley, Adam-Christiaan van Roosmalen

摘要:

研究了遗传阿贝尔范畴的导出范畴中的通道。给定一个通道,通过考虑通道的不同同调,我们将阿贝尔范畴的一系列子范畴联系起来。然后我们得到一个序列,称为窄序列。然后,我们证明了遗传阿贝尔范畴中的一个窄序列由一个非减的宽子范畴序列组成,并且在每个宽子范畴中都有一个倾斜挠类。此外,这些挠类还必须满足一些关系。这些结果足以恢复已知的分类的t-结构的光滑射影曲线,并为有限生成模上的Dedekind环。在某些特殊情况下,包括有限维遗传代数上的有限维模的情况,我们甚至可以进一步简化,有效地解耦在宽子范畴中选择的不同倾斜挠理论。

英文摘要:

We study aisles in the derived category of a hereditary abelian category. Given an aisle, we associate a sequence of subcategories of the abelian category by considering the different homologies of the aisle. We then obtain a sequence, called a narrow sequence. We then prove that a narrow sequence in a hereditary abelian category consists of a nondecreasing sequence of wide subcategories, together with a tilting torsion class in each of these wide subcategories. Furthermore, there are relations these torsion classes have to satisfy. These results are sufficient to recover known classifications of t-structures for smooth projective curves, and for finitely generated modules over a Dedekind ring. In some special cases, including the case of finite dimensional modules over a finite dimensional hereditary algebra, we can reduce even further, effectively decoupling the different tilting torsion theories one chooses in the wide subcategories.

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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