OAI/Geometry/RCD/Harmonic/QuadraticRadialError.lean

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The actual radial derivative is close to a coordinate value

  1. theorem OAI.RegularPointCoordinates.gram_action_sq line 13
  2. theorem OAI.RegularPointCoordinates.coordinateQuadratic_raw_error line 50

    Source documentation

    Near-orthonormal coordinate gradients identify the gradient of the quadratic model with the corresponding coordinate values in L2. Together with the value-to-gradient estimate this proves the raw radial convergence.

    theorem coordinateQuadratic_raw_error {n : ℕ} {Ω : Set X} (hfin : μ Ω ≠ ∞)
        (u : Fin n → SobolevSpace μ hQ) (C : ℝ≥0) (q : SobolevSpace μ hQ)
        (hub : ∀ j, ∀ᵐ x ∂μ, |SobolevSpace.toLp μ hQ (u j) x| ≤ C)
        {M : ℝ} (hM : 0 ≤ M)
        (hgrad : ∀ j, ∀ᵐ x ∂μ.restrict Ω, localGamma μ hQ (u j) (u j) x ≤ M ^ 2)
        (j : Fin n) :
        let H := coordinateQuadratic μ hQ u C
    …

    Mentions: OAI.RegularPointCoordinates.SobolevSpace, OAI.RegularPointCoordinates.SobolevSpace.toLp, OAI.RegularPointCoordinates.localGamma, OAI.RegularPointCoordinates.coordinateQuadratic