OAI/Geometry/RCD/Harmonic/DyadicAffineCoefficient.lean

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Affine nondegeneracy in the actual dyadic normalizing frame

  1. theorem OAI.RegularPointCoordinates.dyadic_affine_coefficient line 19

    Source documentation

    The exact normalization eight levels inward controls the coefficients on the radial testing ball. Slow frame growth returns the estimate to the frame used by the radial fit, with a constant independent of scale.

    theorem dyadic_affine_coefficient {K : ℝ} (m : ℕ)
        (hX : NoncollapsedRCD K (m + 2) X)
        (hgradient : LocalHarmonicL2GradientInput hX)
        {κ : ℝ} (hκ : 0 ≤ κ) :
        ∃ C : ℝ, 1 ≤ C ∧ ∀ {a R ε : ℝ}, 0 ≤ a → 0 < R → a * (3 * R) ≤ 1 →
          BallVolumeComparison (hausdorff (m + 2) X) (comparisonModelVolume (m + 1) a) →
          ∀ p : X,
          ∀ (u : Fin (m + 2) → SobolevSpace (hausdorff (m + 2) X) hX.quadratic),
          ∀ F : ℕ → Euclidean (m + 2) ≃L[ℝ] Euclidean (m + 2),
          0 ≤ ε → ((m + 2 : ℕ) : ℝ) ^ 2 * (normalizationVolumeRatio (m + 1) * ε) ≤ 1 / 64 →
          (∀ i, IsExactMeanNormalization (hausdorff (m + 2) X) hX.quadratic
            (sobolevColumnMap (hausdorff (m + 2) X) hX.quadratic u)
    …

    Mentions: OAI.RegularPointCoordinates.NoncollapsedRCD, OAI.RegularPointCoordinates.LocalHarmonicL2GradientInput, OAI.RegularPointCoordinates.BallVolumeComparison, OAI.RegularPointCoordinates.hausdorff, OAI.RegularPointCoordinates.comparisonModelVolume, OAI.RegularPointCoordinates.SobolevSpace, OAI.RegularPointCoordinates.Euclidean, OAI.RegularPointCoordinates.normalizationVolumeRatio, OAI.RegularPointCoordinates.IsExactMeanNormalization, OAI.RegularPointCoordinates.sobolevColumnMap