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arXiv 2103.17093math.RTmath.AG
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移位$q=0$仿射代数的例外集合、t-结构和范畴作用($\mathfrak{sl}_{2}$情形)

Exceptional collections, t-structures, and categorical action of shifted $q=0$ affine algebra, $\mathfrak{sl}_{2}$ case

You-Hung Hsu

摘要:

本文证明了移位$q=0$仿射代数的范畴作用可以用来构造(或诱导)权范畴上的t-结构。其主要思想是利用Borel-Weil-Bott定理将Kapranov构造的例外集解释为在范畴作用下的Fourier-Mukai核的卷积。特别是当范畴是格拉斯曼上凝聚层的有界导出范畴时。我们获得的t-结构正是卡普拉诺夫给出的特殊集合中贝兹鲁卡夫尼科夫定义的奇异t-结构。作为应用,我们在Kapranov例外集的基础上计算了移位$q=0$仿射代数生成元的矩阵系数.

英文摘要:

In this article, we show that the categorical action of the shifted $q=0$ affine algebra can be used to construct (or induce) t-structures on the weight categories. The main idea is to interpret the exceptional collection constructed by Kapranov as convolution of Fourier-Mukai kernels in the categorical action via using the Borel-Weil-Bott theorem. In particular, when the categories are the bounded derived category of coherent sheaves on Grassmannians. The t-structure we obtain is precisely the exotic t-structure defined by Bezrukavnikov of the exceptional collections given by Kapranov. As an application, we calculate the matrix coefficients for generators of the shifted $q=0$ affine algebra on the basis given by Kapranov exceptional collections.

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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