OAI/Geometry/RCD/Coordinates/LongBoundedSource.lean

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Long-time displacement bound for the bounded curvature source

  1. theorem OAI.RegularPointCoordinates.exists_long_bounded_source_bound line 21

    Source documentation

    On each long-time block the bounded source gains the displacement ratio r/s. The volume bound is only needed on the working ball.

    theorem exists_long_bounded_source_bound (hg : HasCoordinateHeatBounds μ ker)
        (hdiff : HasGaussianHeatDifferenceBounds μ ker)
        (n : ℕ) {A V W : ℝ} (hA : 0 ≤ A) (hV : 0 < V) (hW : 0 ≤ W) :
        ∃ C : ℝ, 0 < C ∧ ∀ (R : ℝ), 0 < R → R ≤ 1 → ∀ (i : ℕ) (r : ℝ) (x q : X),
          0 < r → r ≤ (R / 2 ^ i) / 2 → μ (ball q r) ≠ ∞ → 0 < μ.real (ball q r) →
          dist x q ≤ A * r →
          (∀ j ≤ i, μ.real (ball x (2 ^ j * (R / 2 ^ i))) ≤ W * (2 ^ j * (R / 2 ^ i)) ^ n) →
          ∀ (t : ℝ), 0 < t → t ∈ Icc ((R / 2 ^ i) ^ 2 / 4) ((R / 2 ^ i) ^ 2) →
          (∀ z ∈ ball x R, V * (Real.sqrt t) ^ n ≤ μ.real (ball z (Real.sqrt t))) →
          ∀ (g : X → ℝ) (B : ℝ), 0 ≤ B → (∀ᵐ z ∂μ, |g z| ≤ B) →
          (∀ᵐ z ∂μ, z ∉ ball x R → g z = 0) →
          |∫ z, (kernelAverage μ ker t (ball q r) z - ker t x z) * g z ∂μ| ≤
    …

    Mentions: OAI.RegularPointCoordinates.HasCoordinateHeatBounds, OAI.RegularPointCoordinates.HasGaussianHeatDifferenceBounds, OAI.RegularPointCoordinates.kernelAverage