OAI/GroupTheory/PolycyclicRecognition/Algebra/OccupationMicrostepLimit.lean

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The two successive limits in the convex increment argument

  1. theorem OAI.PolycyclicRecognition.normalized_microstep_error_tendsto_zero line 23

    Source documentation

    First take the chart scale to infinity for a fixed integer microstep, then take the microstep length to infinity for the single limiting law. No rate of stationary convergence uniform over probabilities is used.

    theorem normalized_microstep_error_tendsto_zero
        {ι : Type*} {l : Filter ι}
        (π : G →* Multiplicative W) (hπ : LipschitzWith K (fun g => (π g).toAdd))
        (σ μs : ι → ProbabilityMeasure (NormalizedPair G Λ))
        (μ : ProbabilityMeasure (NormalizedPair G Λ))
        (hμ : Tendsto μs l (𝓝 μ))
        (t : ι → ℝ) (ht : Tendsto t l atTop)
        (endpoint : ι → G) (g : ℕ → G) (n : ℕ → ι → ℕ) (h : ℕ → ι → G)
        (c : ℝ≥0) {D : ℝ} (hD : 0 ≤ D)
        (hsteps : ∀ L : ℕ, 0 < L → ∀ᶠ r in l,
          0 < t r ∧ (n L r : ℝ) * L ≤ t r ∧ t r ≤ ((n L r : ℝ) + 1) * L ∧
          dist 1 (h L r) ≤ D * L ∧ g L ^ n L r * h L r = endpoint r ∧
    …

    Mentions: OAI.PolycyclicRecognition.NormalizedPair