OAI/NumberTheory/CubicMoment/Estimates/LargeValueSubsequence.lean

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A large-value subsequence is extracted from the actual finite moment.

  1. lemma OAI.CubicFirstMoment.logarithmic_power_bounds line 12
  2. theorem OAI.CubicFirstMoment.extract_large_value_subsequence line 28

    Source documentation

    Uniform elementary bounds and an unsaved moment yield actual selected rows and simultaneous logarithmic limits. Their exponents satisfy the large-value inequality, rather than having it as an assumption.

    theorem extract_large_value_subsequence {ι κ : Type*} [Fintype ι] [DecidableEq ι]
        (Y G : ℕ → ℝ) (S : ℕ → Finset κ) (f : ℕ → ι → κ → ℝ)
        {H K D s : ℝ} (hH : 0 ≤ H) (hK : 0 ≤ K)
        (hY : Tendsto Y atTop atTop) (hY₁ : ∀ j, 1 < Y j)
        (hG : ∀ j, 0 < G j) (hGexp : HasPowerExponent Y G s)
        (hcard : ∀ j, ((S j).card:ℝ) ≤ (Y j)^D)
        (hlo : ∀ j, ∀ x ∈ S j, ∀ i, (Y j)^(-K) ≤ f j i x)
        (hhi : ∀ j, ∀ x ∈ S j, ∀ i, f j i x ≤ (Y j)^H)
        (hmoment : ∀ j, G j ≤ ∑ x ∈ S j, (∏ i, f j i x)^2) :
        ∃ (φ : ℕ → ℕ) (P : ℕ → Finset κ) (B : ℕ → ι → ℝ) (r : ℝ) (v : ι → ℝ),
          StrictMono φ ∧ (∀ j, (P j).Nonempty ∧ P j ⊆ S (φ j)) ∧
          (∀ j i, (Y (φ j))^(-K) ≤ B j i ∧ B j i ≤ (Y (φ j))^H) ∧
    …

    Mentions: OAI.CubicFirstMoment.HasPowerExponent