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arXiv 0810.1401math.RTmath.RA
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基于外正交对的遗传环的望远镜猜想

The telescope conjecture for hereditary rings via Ext-orthogonal pairs

Henning Krause, Jan Stovicek

摘要:

研究了遗传环的模范畴的子范畴的Ext-正交对。对于由单个模块生成的每个Ext正交对,构造5项正合序列。刻画了有限型对,并建立了遗传环类的两个推论:同调满态与泛局部化重合,以及导出范畴的望远镜猜想成立.然而,我们提出的例子表明,这两个声明都不是真的,一般环的整体尺寸为2。

英文摘要:

For the module category of a hereditary ring, the Ext-orthogonal pairs of subcategories are studied. For each Ext-orthogonal pair that is generated by a single module, a 5-term exact sequence is constructed. The pairs of finite type are characterized and two consequences for the class of hereditary rings are established: homological epimorphisms and universal localizations coincide, and the telescope conjecture for the derived category holds true. However, we present examples showing that neither of these two statements is true in general for rings of global dimension 2.

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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