An introduction to motivic Hall algebras

An introduction to motivic Hall algebras
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DOI:
10.1016/j.aim.2011.09.003
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发表时间:
2010-02
期刊:
arXiv: Algebraic Geometry
影响因子:
--
通讯作者:
T. Bridgeland
T. Bridgeland
中科院分区:
其他
文献类型:
--
作者:
T. Bridgeland

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本文介绍了Joyce在簇M上构造凝聚层的动机Hall代数。当M是一个Calabi-Yau三重时,我们定义了一个从这个Hall代数的Poisson子代数到辛环面上的函数环的半经典积分映射。Bridgeland(2011)[3]将使用这种材料来证明Calabi-Yau三重上Donaldson-Thomas曲线计数不变量的一些基本性质。
We give an introduction to Joyceʼs construction of the motivic Hall algebra of coherent sheaves on a variety M. When M is a Calabi–Yau threefold we define a semi-classical integration map from a Poisson subalgebra of this Hall algebra to the ring of functions on a symplectic torus. This material will be used in Bridgeland (2011) [3] to prove some basic properties of Donaldson–Thomas curve-counting invariants on Calabi–Yau threefolds.