Multiplicity free quasi-Hamiltonian manifolds
Multiplicity free quasi-Hamiltonian manifolds
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发表时间:
2016
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通讯作者:
F. Knop
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作者:
F. Knop
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.