Abelian categories arising from cluster tilting subcategories II: quotient functors

Abelian categories arising from cluster tilting subcategories II: quotient functors
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由簇倾斜子类别 II 产生的阿贝尔类别:商函子

DOI:
10.1017/prm.2019.42
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发表时间:
2018-09
期刊:
Proceedings of the Royal Society of Edinburgh
影响因子:
--
通讯作者:
Panyue Zhou
Panyue Zhou
中科院分区:
其他
文献类型:
--
作者:
Yu Liu;Panyue Zhou

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本文考虑了一个外三角范畴的理想商,使得理想是从这个外三角范畴到一个交换范畴的函子的核。研究了函子稠密且满时的理想商的交换条件。利用同调方法,给出了该函子的一个新的簇倾斜子范畴的等价刻画。作为一个应用,我们证明了在一个连通的2-Calabi-Yau三角化范畴中,一个函子有限的扩张闭子范畴?的是集群倾斜当且仅当?是阿贝尔范畴。
Abstract In this paper, we consider a kind of ideal quotient of an extriangulated category such that the ideal is the kernel of a functor from this extriangulated category to an abelian category. We study a condition when the functor is dense and full, in another word, the ideal quotient becomes abelian. Moreover, a new equivalent characterization of cluster tilting subcategories is given by applying homological methods according to this functor. As an application, we show that in a connected 2-Calabi-Yau triangulated category ℬ, a functorially finite, extension closed subcategory ? of ℬ is cluster tilting if and only if ℬ /? is an abelian category.
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