OAI/Geometry/RCD/Transport/WeightedTransportEnergy.lean

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Absorbing both errors in the weak transport balance

  1. theorem OAI.RegularPointCoordinates.weighted_transport_energy line 17

    Source documentation

    Integration and two weighted Young inequalities give a quadratic bound. All weights and the weak balance are explicit; the radial cutoff supplies them in the application. In particular no division by the inner norm occurs.

    theorem weighted_transport_energy (B : Set X) (hB : MeasurableSet B)
        {w e F χ ρ ζ K : X → ℝ} {C Dχ Dρ Dζ A : ℝ}
        (hw : MemLp w 2 μ) (he : MemLp e 2 μ) (hF : MemLp F 2 μ)
        (hχ : AEStronglyMeasurable χ μ) (hρ : AEStronglyMeasurable ρ μ)
        (hζ : AEStronglyMeasurable ζ μ)
        (hwbound : ∀ᵐ x ∂μ, |w x| ≤ C)
        (hχbound : ∀ᵐ x ∂μ, 0 ≤ χ x ∧ χ x ≤ Dχ)
        (hρbound : ∀ᵐ x ∂μ, 0 ≤ ρ x ∧ ρ x ≤ Dρ)
        (hζbound : ∀ᵐ x ∂μ, 0 ≤ ζ x ∧ ζ x ≤ Dζ)
        (hK : Integrable (fun x => K x * (w x) ^ 2) μ)
        (hcoerce : ∀ᵐ x ∂μ, ζ x ≤ A * B.indicator (fun _ => (1 : ℝ)) x - K x + ρ x * e x)
        (hχcompare : ∀ᵐ x ∂μ, χ x ≤ ζ x + Dχ * B.indicator (fun _ => (1 : ℝ)) x)
    …