Monadicity theorem and weighted projective lines of tubular type

Monadicity theorem and weighted projective lines of tubular type
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单性定理和管型加权投影线

DOI:
10.1093/imrn/rnv106
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发表时间:
2014-07
影响因子:
1
通讯作者:
周振强
周振强
中科院分区:
数学1区
文献类型:
--
作者:
陈健敏;陈小伍;周振强

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我们为阿贝尔范畴制定了贝克一元性定理的一个版本,该定理应用于关于有限群作用的阿贝尔范畴的等变化。我们证明等变化与 Serre 子范畴的商阿贝尔范畴的构造是兼容的。我们证明了分级环上分级模块类别的等变化等效于同一环上但具有不同分级的分级模块类别。我们从这些结果中推断出管状加权投影线上的(等变)相干滑轮类别与椭圆曲线上的(等变)相干滑轮类别之间的两个等价,其中作用群是循环的并且这两个等价在某种程度上彼此相邻。
We formulate a version of Beck's monadicity theorem for abelian categories, which is applied to the equivariantization of abelian categories with respect to a finite group action. We prove that the equivariantization is compatible with the construction of quotient abelian categories by Serre subcategories. We prove that the equivariantization of the graded module category over a graded ring is equivalent to the graded module category over the same ring but with a different grading. We deduce from these results two equivalences between the category of (equivariant) coherent sheaves on a weighted projective line of tubular type and that on an elliptic curve, where the acting groups are cyclic and the two equivalences are somehow adjoint to each other.
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