The unit loop of a finite-energy cylinder of small area with positive actions is a periodic orbit
ProvedFiniteEnergyPlane.exists_reebOrbit_loop_of_cylindercontact-geometrypseudoholomorphic-curvessymplectic-geometry
Let be a strictly star-shaped level. Let with , where is smaller than the difference of any two distinct periods at most of periodic Reeb orbits. Let be a finite-energy -holomorphic curve on with Hofer energy at most , -energy at most , and action at least on every counterclockwise circle about . Then there are a periodic Reeb orbit with and such that for all .
Preamble
import Definitions.Def_FiniteEnergyPlane_Setting
Formal statement
namespace FiniteEnergyPlane
open MeasureTheory Metric Filter Topology
open scoped ContDiff ENNReal Real
/-- Finite-energy cylinders of small area. Let `e, η > 0`, with `e` smaller than the difference of
any two distinct periods at most `C` of periodic Reeb orbits, and let `w` be a finite-energy
`J̃`-holomorphic curve on `ℂ \ {0}` with Hofer energy at most `C`, `dλ`-energy at most `e` and action
at least `η` on every counterclockwise circle about `0`. Then there are a periodic Reeb orbit `(x, T)`
with `T ≤ C` and `c ∈ ℝ` with `proj(w(e^{2π i t})) = x(T t + c)` for all `t`. -/
theorem exists_reebOrbit_loop_of_cylinder {n : ℕ} (H : V n → ℝ) (hH : IsStrictlyStarShapedLevel H)
(J : V n → V n →L[ℝ] V n) (hJ : IsCompatibleXiStructure H J) (w : ℂ → V n)
(hw : IsFiniteEnergyCurve H J {z | z ≠ 0} w) (C e η : ℝ) (he : 0 < e)
(he₂ : ∀ Q₁ Q₂ : ReebOrbit H, Q₁.T ≤ C → Q₂.T ≤ C → Q₁.T ≠ Q₂.T → e < |Q₁.T - Q₂.T|)
(hη : 0 < η) (hE : energy H {z | z ≠ 0} w ≤ ENNReal.ofReal C)
(hd : dlambdaEnergy H {z | z ≠ 0} w ≤ ENNReal.ofReal e)
(hact : ∀ ρ : ℝ, 0 < ρ → η ≤ loopAction H w (ccwLoop ρ)) :
∃ Q : ReebOrbit H, Q.T ≤ C ∧ ∃ c : ℝ, ∀ t : ℝ,
loopInS H w (ccwLoop 1) t = Q.x (Q.T * t + c) := by
sorry
end FiniteEnergyPlane
Source
U. Hryniewicz, Fast finite-energy planes in symplectizations and applications, Trans. Amer. Math. Soc. 364 (2012), 1859-1931, Lemma 4.11; H. Hofer, K. Wysocki, E. Zehnder, Finite energy cylinders of small area, Ergodic Theory Dynam. Systems 22 (2002), 1451-1486, Theorem 1.1