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arXiv 0906.5213math.AG
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Drinfeld向量丛的模型范畴结构

Model category structures arising from Drinfeld vector bundles

S. Estrada, P. A. Guil Asensio, M. Prest, J. Trlifaj

摘要:

给出了半分离概型$X$上拟相干层的无界链复形体范畴$\mathbb{C}(\mathfrak{Qco}(X))$上模型范畴结构的一般构造.该结构是基于兼容的过滤的各个模块的部分在开放的仿射子集的$X$。它不像以前的方法那样需要在直接限制下闭合。我们应用它来描述导出范畴$\mathbb D (\mathfrak{Qco}(X))$通过各种模型结构上的$\mathbb{C}(\mathgrak{Qco}(X))$。作为特殊的例子,我们恢复最近的结果准相干层的平坦模型结构。我们的方法还包括(无限维)向量丛的情况下,和限制平坦的Mittag-Leffler准相干层,介绍了德林费尔德。最后,我们证明了在一般情况下,无限制的情况下不会导出上述的模型范畴结构。

英文摘要:

We present a general construction of model category structures on the category $\mathbb{C}(\mathfrak{Qco}(X))$ of unbounded chain complexes of quasi-coherent sheaves on a semi-separated scheme $X$. The construction is based on making compatible the filtrations of individual modules of sections at open affine subsets of $X$. It does not require closure under direct limits as previous methods. We apply it to describe the derived category $\mathbb D (\mathfrak{Qco}(X))$ via various model structures on $\mathbb{C}(\mathgrak{Qco}(X))$. As particular instances, we recover recent results on the flat model structure for quasi-coherent sheaves. Our approach also includes the case of (infinite-dimensional) vector bundles, and of restricted flat Mittag-Leffler quasi-coherent sheaves, as introduced by Drinfeld. Finally, we prove that the unrestricted case does not induce a model category structure as above in general.

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