OAI/GroupTheory/PolycyclicRecognition/Analysis/SubexponentialVolumeComparison.lean

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3 declarations, 0 contain sorry, 0 declared as axioms

Comparing exponential rates after subexponential losses

  1. theorem OAI.PolycyclicRecognition.exponent_le_of_subexponential_exp_bound line 15

    Source documentation

    The measurable-image loss disappears in the eventual packing comparison.

    theorem exponent_le_of_subexponential_exp_bound {p q : ℝ} {f g : ℝ → ℝ}
        (hf : HasSubexponentialLowerBound f) (hg : HasSubexponentialUpperBound g)
        (hbound : ∀ᶠ r in atTop, f r * Real.exp (r * p) ≤ g r * Real.exp (r * q)) :
        p ≤ q := by
    …

    Mentions: OAI.PolycyclicRecognition.HasSubexponentialLowerBound, OAI.PolycyclicRecognition.HasSubexponentialUpperBound

  2. theorem OAI.PolycyclicRecognition.exponent_le_of_subexponential_polynomial_bound line 38

    Source documentation

    A fixed polynomial packing prefactor also absorbs the subexponential loss of the successful endpoint set.

    theorem exponent_le_of_subexponential_polynomial_bound {p q D : ℝ}
        {f : ℝ → ℝ} (hf : HasSubexponentialLowerBound f) (hD : 0 < D) (k : ℕ)
        (hbound : ∀ᶠ r in atTop,
          f r * Real.exp (r * p) ≤ D * (1 + r) ^ k * Real.exp (r * q)) : p ≤ q := by
    …

    Mentions: OAI.PolycyclicRecognition.HasSubexponentialLowerBound

  3. theorem OAI.PolycyclicRecognition.exponent_le_of_subexponential_separated_counts line 56

    Source documentation

    The separated endpoint count may lose subexponential mass, as in the successful-parameter image estimate.

    theorem exponent_le_of_subexponential_separated_counts {p q D : ℝ}
        {f : ℝ → ℝ} (hf : HasSubexponentialLowerBound f) (hD : 0 < D)
        {Q : ℝ≥0∞} (hQ : Q < ⊤) (k : ℕ)
        (hcount : ∀ᶠ r in atTop, ∃ N : ℕ,
          ENNReal.ofReal (f r) * ENNReal.ofReal (Real.exp (r * p)) ≤ (N : ℝ≥0∞) * Q ∧
          (N : ℝ) ≤ D * (1 + r) ^ k * Real.exp (r * q)) : p ≤ q := by
    …

    Mentions: OAI.PolycyclicRecognition.HasSubexponentialLowerBound