Complete hyperkaehler 4n-manifolds with a local tri-Hamiltonian R^n-action
Complete hyperkaehler 4n-manifolds with a local tri-Hamiltonian R^n-action
复制标题
具有局部三哈密顿 R^n 作用的完全超凯勒 4n 流形
DOI:
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发表时间:
1998
期刊:
影响因子:
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通讯作者:
R. Bielawski
中科院分区:
文献类型:
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作者:
R. Bielawski
We classify those manifolds mentioned in the title which have finite topological type. Namely we show any such connected M is isomorphic to a hyperkaehler quotient of a flat quaternionic vector space by an abelian group.
We also show that a compact connected and simply connected 3-Sasakian manifold of dimension 4n-1 whose isometry group has rank n+1 is isometric to a 3-Sasakian quotient of a sphere by a torus. As a corollary, a compact connected quaternion-Kaehler 4n-manifold with positive scalar curvature and isometry group of rank n+1 is isometric to the quaternionic projective space or the complex grassmanian.
DOI:
10.1515/9781400859306
发表时间:
1988
期刊:
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影响因子:
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作者:
M. Atiyah;N. Hitchin
通讯作者:
M. Atiyah;N. Hitchin