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
中科院分区:
文献类型:
--
作者:
W. Crawley-Boevey
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.