Multiplicity free quasi-Hamiltonian manifolds

Multiplicity free quasi-Hamiltonian manifolds
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多重自​​由拟哈密顿流形

DOI:
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发表时间:
2016
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通讯作者:
F. Knop
F. Knop
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文献类型:
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作者:
F. Knop

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如果一个(拟)哈密顿流形的所有辛约化都是0维的,则称它为无重数的。在这篇文章中,我们对(扭曲的)环群的无重数哈密顿作用进行分类,或者等价地,对单连通紧致李群的无重数(扭)拟哈密顿流形进行分类。结果,我们恢复了旧的结构,并找到了这些结构的新例子。
A (quasi-)Hamiltonian manifold is called multiplicity free if all of its symplectic reductions are 0-dimensional. In this paper, we classify multiplicity free Hamiltonian actions for (twisted) loop groups or, equivalently, multiplicity free (twisted) quasi-Hamiltonian manifolds for simply connected compact Lie groups. As a result we recover old and find new examples of these structures.