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arXiv 2007.12716math.CTmath.KT
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弱单位dg范畴范畴II上的一个闭模型结构

A closed model structure on the category of weakly unital dg categories, II

Piergiorgio Panero, Boris Shoikhet

摘要:

在本文中,我们继续研究域$\Bbbk$上的弱单位dg范畴(在Kontsevich-Soibelman [KS]的意义下)的范畴$\mathrm{Cat}_{\mathrm{dgwu}}(\Bbbk)$的闭模型结构.在[PS]中,我们在弱单位dg范畴上构造了一个封闭的模型结构,给弱单位dg范畴加了一个技术条件,即对任何对象$x$都有$\mathrm{id}_x\cdot \mathrm{id}_x=\mathrm{id}_x$.虽然这个条件使我们大大简化,但它是多余的,必须放弃。在这里,我们摆脱了这种情况,并提供了一个封闭的模型结构,在充分的一般性。新的闭模型范畴也是上纤生成的,并证明它与Tabuada [表1]给出的$\Bbbk$上(严格单位)dg范畴的闭模型范畴$\mathrm{Cat}_\mathrm{dg}(\Bbbk)$是Quillen等价的.删除条件$\mathrm{id}_x^2=\mathrm{id}_x$会使闭合模型结构的构造与loc.cit.更加疏远,并且需要新的构造。其中之一是一个wu dg范畴的预三角壳,这反过来又被证明是一个wu dg范畴。自然出现的弱单位dg范畴的一个例子是dg范畴的棒棒分解。本文给出了严格酉dg范畴的经典bar-cobar分解的一个改进(附录B)。类似的构造可以应用于在$\mathrm{Cat}_\mathrm{dgwu}(\Bbbk)$中构造一致性解析。

英文摘要:

In this paper, which is subsequent to our previous paper [PS] (but can be read independently from it), we continue our study of the closed model structure on the category $\mathrm{Cat}_{\mathrm{dgwu}}(\Bbbk)$ of small weakly unital dg categories (in the sense of Kontsevich-Soibelman [KS]) over a field $\Bbbk$. In [PS], we constructed a closed model structure on the category of weakly unital dg categories, imposing a technical condition on the weakly unital dg categories, saying that $\mathrm{id}_x\cdot \mathrm{id}_x=\mathrm{id}_x$ for any object $x$. Although this condition led us to a great simplification, it was redundant and had to be dropped. Here we get rid of this condition, and provide a closed model structure in full generality. The new closed model category is as well cofibrantly generated, and it is proven to be Quillen equivalent to the closed model category $\mathrm{Cat}_\mathrm{dg}(\Bbbk)$ of (strictly unital) dg categories over $\Bbbk$, given by Tabuada [Tab1]. Dropping the condition $\mathrm{id}_x^2=\mathrm{id}_x$ makes the construction of the closed model structure more distant from loc.cit., and requires new constructions. One of them is a pre-triangulated hull of a wu dg category, which in turn is shown to be a wu dg category as well. One example of a weakly unital dg category which naturally appears is the bar-cobar resolution of a dg category. We supply this paper with a refinement of the classical bar-cobar resolution of a unital dg category which is strictly unital (appendix B). A similar construction can be applied to constructing a cofibrant resolution in $\mathrm{Cat}_\mathrm{dgwu}(\Bbbk)$.

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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