Hofer's metrics and boundary depth
Hofer's metrics and boundary depth
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Hofer 的度量和边界深度
DOI:
10.24033/asens.2185
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发表时间:
2011
期刊:
影响因子:
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通讯作者:
Michael Usher
中科院分区:
文献类型:
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作者:
Michael Usher
We show that if (M,\omega) is a closed symplectic manifold which admits a nontrivial Hamiltonian vector field all of whose contractible closed orbits are constant, then Hofer's metric on the group of Hamiltonian diffeomorphisms of (M,\omega) has infinite diameter, and indeed admits infinite-dimensional quasi-isometrically embedded normed vector spaces. A similar conclusion applies to Hofer's metric on various spaces of Lagrangian submanifolds, including those Hamiltonian-isotopic to the diagonal in M x M when M satisfies the above dynamical condition. To prove this, we use the properties of a Floer-theoretic quantity called the boundary depth, which measures the nontriviality of the boundary operator on the Floer complex in a way that encodes robust symplectic-topological information.
DOI:
--
发表时间:
2009
期刊:
影响因子:
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作者:
K. Fukaya;Y. Oh;H. Ohta;K. Ôno
通讯作者:
K. Ôno