OAI/Geometry/RCD/Sobolev/RawCutoffError.lean

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Directional cutoff error outside the controlled normalization range

  1. theorem OAI.RegularPointCoordinates.cutoff_direction_error_le_raw line 21

    Source documentation

    A raw gradient bound gives a global cutoff error budget after any linear change of frame. No regularity is required outside the cutoff.

    theorem cutoff_direction_error_le_raw (U : E →L[ℝ] SobolevSpace μ hQ)
        (A : E →L[ℝ] E) {s : Set X} (hsfin : μ s ≠ ∞)
        {χ : X → ℝ} (hχ : Continuous χ)
        (hχrange : ∀ x, 0 ≤ χ x ∧ χ x ≤ 1) (hχzero : ∀ x ∉ s, χ x = 0)
        {L B : ℝ} (hL : 0 ≤ L)
        (hgradient : ∀ v : E, ∀ᵐ x ∂μ.restrict s,
          localGamma μ hQ (U v) (U v) x ≤ L * ‖v‖ ^ 2)
        (hframe : ∀ v : E, ‖A v‖ ^ 2 ≤ B * ‖v‖ ^ 2) (v : E) :
        (∫ x, χ x * |localGamma μ hQ (U (A v)) (U (A v)) x - ‖v‖ ^ 2| ∂μ) ≤
          (L * B + 1) * μ.real s * ‖v‖ ^ 2 := by
    …

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