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PFH spectral invariants and $C^\infty$ closing lemmas

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arxiv 2110.02463 v5 pith:DDUYXC2R submitted 2021-10-06 math.SG math.DS

classification math.SGmath.DS
keywords area-preservingclosinginftyinvariantslemmasperiodicspectraldelta
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abstract

We develop the theory of spectral invariants in periodic Floer homology (PFH) of area-preserving surface diffeomorphisms. We use this theory to prove $C^\infty$ closing lemmas for certain Hamiltonian isotopy classes of area-preserving surface diffeomorphisms. In particular, we show that for a $C^\infty$-generic area-preserving diffeomorphism of the torus, the set of periodic points is dense. Our closing lemmas are quantitative, asserting roughly speaking that for a given Hamiltonian isotopy, within time $\delta$ a periodic orbit must appear of period $O(\delta^{-1})$. We also prove a "Weyl law" describing the asymptotic behavior of PFH spectral invariants.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Reeb orbits frequently intersecting a symplectic surface

    math.SG 2025-04 conditional novelty 8.0 of 10

    For a nice contact form, some Reeb orbit intersects a given symplectic surface with frequency at least the surface area divided by the contact volume, without any genericity assumption.

  2. Generic density of periodic orbits of area-preserving maps on punctured surfaces

    math.DS 2024-11 conditional novelty 7.0 of 10

    C-infinity generic area-preserving diffeomorphisms on finitely punctured surfaces have dense periodic orbits, and on punctured spheres the orbits can be chosen equidistributed.

  3. Conformally symplectic topology from a dynamical viewpoint

    math.SG 2026-07 accept novelty 4.0 of 10

    Characteristic foliations of contact Hamiltonian manifolds determine convexity of hypersurfaces, with Morse-Smale implying convexity, C0-density of convex hypersurfaces, and C2-robust non-convex examples in dimensions ≥5.

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