Geometry of the Moment Map for Representations of Quivers

Geometry of the Moment Map for Representations of Quivers
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DOI:
10.1023/a:1017558904030
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发表时间:
2001-05
影响因子:
1.8
通讯作者:
W. Crawley-Boevey
W. Crawley-Boevey
中科院分区:
数学1区
文献类型:
--
作者:
W. Crawley-Boevey

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我们研究的时刻地图相关的余切丛的空间表示的一个小的,确定当它是平坦的,并给出一个分层的Marsden-Weinstein减少。为了做到这一点,我们确定可能的维度向量的简单表示变形预投射代数。在附录中,我们使用变形预投射代数给一个简单的证明了大部分卡茨定理的代表性的箭图的特征零。
We study the moment map associated to the cotangent bundle of the space of representations of a quiver, determining when it is flat, and giving a stratification of its Marsden–Weinstein reductions. In order to do this we determine the possible dimension vectors of simple representations of deformed preprojective algebras. In an appendix we use deformed preprojective algebras to give a simple proof of much of Kac's Theorem on representations of quivers in characteristic zero.