OAI/Geometry/RCD/Metric/PositiveDistanceLocality.lean

GitHub source file

2 declarations, 0 contain sorry, 0 declared as axioms

The radial derivative does not depend on the outer distance cutoff

  1. theorem OAI.RegularPointCoordinates.positiveSquaredDistance_pairing_independent line 20

    Source documentation

    All positive squared-distance data at one center agree locally. Consequently their pairing with an arbitrary Sobolev direction is the same raw radial derivative, even though their compact supports differ.

    theorem positiveSquaredDistance_pairing_independent {p : X} {r R₁ R₂ C₁ C₂ : ℝ}
        (hR₁ : 0 ≤ R₁) (hR₂ : 0 ≤ R₂) (hr₁ : r ≤ R₁) (hr₂ : r ≤ R₂)
        (χ₁ : GoodLaplacianCutoff μ hQ p R₁ C₁)
        (χ₂ : GoodLaplacianCutoff μ hQ p R₂ C₂) (a : SobolevSpace μ hQ) :
        localGamma μ hQ (positiveSquaredDistance μ hQ hR₁ χ₁) a =ᵐ[μ.restrict (ball p r)]
          localGamma μ hQ (positiveSquaredDistance μ hQ hR₂ χ₂) a := by
    …

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

  2. theorem OAI.RegularPointCoordinates.distanceSourceRadius_add line 41