526 research outputs found

    Floer homology and its continuity for non-compact Lagrangian submanifolds

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    We give a construction of the Floer homology of the pair of {\it non-compact} Lagrangian submanifolds, which satisfies natural continuity property under the Hamiltonian isotopy which moves the infinity but leaves the intersection set of the pair compact. This construction uses the concept of Lagrangian cobordism and certain singular Lagrangian submanifolds. We apply this construction to conormal bundles (or varieties) in the cotangent bundle, and relate it to a conjecture made by MacPherson on the intersection theory of the characteristic Lagrangian cycles associated to the perverse sheaves constructible to a complex stratification on the complex algebraic manifold.Comment: Submitted to the Proceedings for 7th Gokova Geometry-Topology Conferenc

    Localization of Floer homology of engulfable topological Hamiltonian loop

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    Localization of Floer homology is first introduced by Floer \cite{floer:fixed} in the context of Hamiltonian Floer homology. The author employed the notion in the Lagrangian context for the pair (ϕH1(L),L)(\phi_H^1(L),L) of compact Lagrangian submanifolds in tame symplectic manifolds (M,ω)(M,\omega) in \cite{oh:newton,oh:imrn} for a compact Lagrangian submanifold LL and C2C^2-small Hamiltonian HH. In this article, motivated by the study of topological Hamiltonian dynamics, we extend the localization process for any engulfable Hamiltonian path ϕH\phi_H whose time-one map ϕH1\phi_H^1 is sufficiently C0C^0-close to the identity (and also to the case of triangle product), and prove that the value of local Lagrangian spectral invariant is the same as that of global one. Such a Hamiltonian path naturally occurs as an approximating sequence of engulfable topological Hamiltonian loop. We also apply this localization to the graphs \Graph \phi_H^t in (M×M,ωω)(M\times M, \omega\oplus -\omega) and localize the Hamiltonian Floer complex of such a Hamiltonian HH. We expect that this study will play an important role in the study of homotopy invariance of the spectral invariants of topological Hamiltonian.Comment: 30http://arxiv.org/help/prep#comments pages, incorrect usage of area in the localization process is replaced by the usage of maximum principle, a coincidence theorem of local Lagrangian spectral invariants and the global ones on cotangent bundle is added; v4) exposition improve
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