Hypertoric Manifolds and HyperKähler Moment Maps
Hypertoric Manifolds and HyperKähler Moment Maps
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Hypertoric 流形和 HyperKähler 矩图
DOI:
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发表时间:
2016
期刊:
影响因子:
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通讯作者:
A. Swann
中科院分区:
文献类型:
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作者:
A. Dancer;A. Swann
We discuss various aspects of moment map geometry in symplectic and hyperKahler geometry. In particular, we classify complete hyperKahler manifolds of dimension (4n) with a tri-Hamiltonian action of a torus of dimension (n), without any assumption on the finiteness of the Betti numbers. As a result we find that the hyperKahler moment in these cases has connected fibres, a property that is true for symplectic moment maps, and is surjective. New examples of hypertoric manifolds of infinite topological type are produced. We provide examples of non-Abelian tri-Hamiltonian group actions of connected groups on complete hyperKahler manifolds such that the hyperKahler moment map is not surjective and has some fibres that are not connected. We also discuss relationships to symplectic cuts, hyperKahler modifications and implosion constructions.
影响因子:
1.8
作者:
Dancer A
通讯作者:
Dancer A