Approximations, ghosts and derived equivalences

Approximations, ghosts and derived equivalences
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近似值、重影和导出的等价物

DOI:
10.1017/prm.2018.120
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发表时间:
2014-06
期刊:
Proceedings of the Royal Society of Edinburgh Section A: Mathematics
影响因子:
--
通讯作者:
Wei Hu
Wei Hu
中科院分区:
其他
文献类型:
--
作者:
Yiping Chen;Wei Hu

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摘要在表示论、代数几何和非对易几何中,倾斜物体突变的研究中经常出现近似序列和导出等价。本文在加法范畴和弱n-角范畴中引入了对称逼近序列,其中包括代数和几何中的(高级)Auslander-Reiten序列(三角形)和突变序列,并证明了这类序列在模某些ghost和coghist理想的序列中总是引起对象的自同态环的商环之间的导出等价.
Abstract Approximation sequences and derived equivalences occur frequently in the research of mutation of tilting objects in representation theory, algebraic geometry and noncommutative geometry. In this paper, we introduce symmetric approximation sequences in additive categories and weakly n-angulated categories which include (higher) Auslander-Reiten sequences (triangles) and mutation sequences in algebra and geometry, and show that such sequences always give rise to derived equivalences between the quotient rings of endomorphism rings of objects in the sequences modulo some ghost and coghost ideals.
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