OAI/Geometry/RCD/Metric/DistanceSourceBudget.lean

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5 declarations, 0 contain sorry, 0 declared as axioms

Summability of the constructed distance sources from volume bounds

  1. def OAI.RegularPointCoordinates.distanceVolumeProfile line 18
  2. def OAI.RegularPointCoordinates.normalizedDistanceSourceMass line 21
  3. theorem OAI.RegularPointCoordinates.distanceVolumeProfile_succ line 26
  4. theorem OAI.RegularPointCoordinates.DyadicDistanceSources.normalized_mass_le line 33
  5. theorem OAI.RegularPointCoordinates.DyadicDistanceSources.mass_budget line 56

    Source documentation

    The full source masses are summable even when the raw Euclidean volume profile is not monotone. The only volume input is its upper bound.

    theorem DyadicDistanceSources.mass_budget {n : ℕ} {κ r0 C : ℝ} {p : X}
        (D : DyadicDistanceSources μ hQ n κ p r0) (hn : 0 < n) (hκ : 0 ≤ κ) (hC : 0 ≤ C)
        {model : ℝ → ℝ} (hBG : BallVolumeComparison μ model) (hmodel : Continuous model)
        (hmodelpos : ∀ r, 0 < r → 0 < model r)
        (hupper : ∀ i, distanceVolumeProfile μ n p r0 i ≤ C) :
        Summable (normalizedDistanceSourceMass μ hQ D) ∧
          (∑' i, normalizedDistanceSourceMass μ hQ D i) ≤
            (radialCutoffCoefficient (n : ℝ))⁻¹ * (C - distanceVolumeProfile μ n p r0 0) +
              (4 * κ * r0 ^ 2 * C * (2 : ℝ) ^ (n : ℝ)) * (4 / 3) := by
    …

    Mentions: OAI.RegularPointCoordinates.DyadicDistanceSources, OAI.RegularPointCoordinates.BallVolumeComparison, OAI.RegularPointCoordinates.distanceVolumeProfile, OAI.RegularPointCoordinates.normalizedDistanceSourceMass, OAI.RegularPointCoordinates.radialCutoffCoefficient