OAI/Geometry/RCD/Sobolev/HessianPotentialSquare.lean

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Hessians of the quadratic perturbations used in Bochner

  1. theorem OAI.RegularPointCoordinates.localHessianAction_potential_square line 17

    Source documentation

    The quadratic perturbation has the expected rank-one second derivative.

    theorem localHessianAction_potential_square {Ω : Set X}
        (g u v gu gv uv : SobolevSpace μ hQ) (B E F : ℝ≥0)
        (hg : ∀ᵐ x ∂μ, |SobolevSpace.toLp μ hQ g x|≤B)
        (hguB : ∀ᵐ x ∂μ, |SobolevSpace.toLp μ hQ gu x|≤E)
        (hgvB : ∀ᵐ x ∂μ, |SobolevSpace.toLp μ hQ gv x|≤F)
        (hgu : SobolevSpace.toLp μ hQ gu =ᵐ[μ.restrict Ω] localGamma μ hQ g u)
        (hgv : SobolevSpace.toLp μ hQ gv =ᵐ[μ.restrict Ω] localGamma μ hQ g v) :
        localHessianAction μ hQ (SobolevSpace.product μ hQ g g B B) u v
          ((2 : ℝ) • SobolevSpace.product μ hQ g gu B E)
          ((2 : ℝ) • SobolevSpace.product μ hQ g gv B F) uv =ᵐ[μ.restrict Ω] fun x =>
          2*SobolevSpace.toLp μ hQ g x*localHessianAction μ hQ g u v gu gv uv x+
            2*localGamma μ hQ g u x*localGamma μ hQ g v x := by
    …

    Mentions: OAI.RegularPointCoordinates.SobolevSpace, OAI.RegularPointCoordinates.SobolevSpace.toLp, OAI.RegularPointCoordinates.localGamma, OAI.RegularPointCoordinates.localHessianAction, OAI.RegularPointCoordinates.SobolevSpace.product