OAI/Geometry/RCD/Sobolev/PoissonBallEnergy.lean

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Caccioppoli control of Poisson energy on an interior ball

  1. theorem OAI.RegularPointCoordinates.NoncollapsedRCD.poisson_ball_energy line 16

    Source documentation

    The actual square gradient has its expected amplitude/source bound.

    theorem NoncollapsedRCD.poisson_ball_energy {K : ℝ} {n : ℕ}
        (hX : NoncollapsedRCD K n X) (p : X) (r : ℝ) (hr : 0 < r)
        (f : SobolevSpace (hausdorff n X) hX.quadratic) (c : ℝ) (A : ℝ≥0)
        (hf : IsConstantLaplacianOn (hausdorff n X) hX.quadratic (ball p (4*r)) f c)
        (hA : ∀ᵐ x ∂hausdorff n X, |SobolevSpace.toLp (hausdorff n X) hX.quadratic f x| ≤ A) :
        (∫ x in ball p r, localGamma (hausdorff n X) hX.quadratic f f x ∂hausdorff n X) ≤
          (2*|c| *A+4*(A:ℝ)^2*(r⁻¹)^2)*(hausdorff n X).real (ball p (4*r)) := by
    …

    Mentions: OAI.RegularPointCoordinates.NoncollapsedRCD, OAI.RegularPointCoordinates.SobolevSpace, OAI.RegularPointCoordinates.hausdorff, OAI.RegularPointCoordinates.IsConstantLaplacianOn, OAI.RegularPointCoordinates.SobolevSpace.toLp, OAI.RegularPointCoordinates.localGamma