OAI/Geometry/RCD/Sobolev/HarmonicInteriorEnergy.lean

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Interior energy bounds from the harmonic gradient estimate

  1. theorem OAI.RegularPointCoordinates.LocalHarmonicL2GradientInput.interior_energy line 18

    Source documentation

    Normalizing the outer L² norm gives a uniform scaled energy bound on every fixed inner fraction. The function need not be bounded pointwise.

    theorem LocalHarmonicL2GradientInput.interior_energy {K : ℝ} {n : ℕ}
        {hX : NoncollapsedRCD K n X} (hinput : LocalHarmonicL2GradientInput hX) (hn : 2 ≤ n)
        {a τ : ℝ} (ha : 0 ≤ a) (hτ : 0 < τ) (hτ1 : τ < 1) :
        ∃ C : ℝ, 1 ≤ C ∧ ∀ (p : X) (R : ℝ), ∀ _hR : 0 < R, -a ≤ K * R ^ 2 →
          ∀ w : SobolevSpace (hausdorff n X) hX.quadratic,
            IsSobolevHarmonicOn (hausdorff n X) hX.quadratic (ball p R) w →
            ‖normalizeLocalL2 (hausdorff n X) (ball p R)
              (ne_of_lt (hX.finiteOnBounded _ isBounded_ball))
              (SobolevSpace.restrictLp (hausdorff n X) hX.quadratic (ball p R) w)‖ ≤ 1 →
            R ^ 2 * ((hausdorff n X).real (ball p R))⁻¹ *
              (∫ x in ball p (τ * R), localGamma (hausdorff n X) hX.quadratic w w x
                ∂hausdorff n X) ≤ C ^ 2 := by
    …

    Mentions: OAI.RegularPointCoordinates.NoncollapsedRCD, OAI.RegularPointCoordinates.LocalHarmonicL2GradientInput, OAI.RegularPointCoordinates.SobolevSpace, OAI.RegularPointCoordinates.hausdorff, OAI.RegularPointCoordinates.IsSobolevHarmonicOn, OAI.RegularPointCoordinates.normalizeLocalL2, OAI.RegularPointCoordinates.SobolevSpace.restrictLp, OAI.RegularPointCoordinates.localGamma