Carleman inequality for the translated Gaussian cutoff #
The compact cutoff data satisfy the Gaussian Carleman inequality with explicit
constant exp(4/3) * (9 + 2 * sqrt 6).
theorem
ESS.buGaussian_shifted_cutoff_carleman
{ρ ε : ℝ}
(hρ : 0 < ρ)
(hε : 0 < ε)
{v : CKN.Foundation.Parabolic.ParabolicPoint → CKN.Foundation.Parabolic.Vec3}
{Dv : CKN.Foundation.Parabolic.ParabolicPoint → Fin 3 → CKN.Foundation.Parabolic.Vec3}
{D2v : CKN.Foundation.Parabolic.ParabolicPoint → Fin 3 → Fin 3 → CKN.Foundation.Parabolic.Vec3}
{Dtv : CKN.Foundation.Parabolic.ParabolicPoint → CKN.Foundation.Parabolic.Vec3}
(hweak : CKN.HasSpaceTimeWeakDerivs (CKN.Foundation.Parabolic.vec3Ball 0 ρ) (Set.Ioo 0 (2 - 1 / 6)) v Dv D2v Dtv)
(hL2 :
∫⁻ (z : CKN.Foundation.Parabolic.ParabolicPoint) in CKN.spaceTimeSet (CKN.Foundation.Parabolic.vec3Ball 0 ρ) (Set.Ioo (1 / 6) 2), ‖buGaussianShiftedField (1 / 6) v z‖ₑ ^ 2 + ‖buGaussianShiftedDw (1 / 6) Dv z‖ₑ ^ 2 + ‖buGaussianShiftedD2w (1 / 6) D2v z‖ₑ ^ 2 + ‖buGaussianShiftedDtw (1 / 6) Dtv z‖ₑ ^ 2 < ⊤)
(a : ℝ)
:
0 < a →
∫ (z : CKN.Foundation.Parabolic.ParabolicPoint) in CKN.spaceTimeSet Set.univ (Set.Ioo 0 2), CKN.gaussCarlemanTimeWeight z.2 ^ (-2 * a) * Real.exp (-CKN.Foundation.Parabolic.vec3EuclideanNorm z.1 ^ 2 / (4 * z.2)) * (a / z.2 * CKN.Foundation.Parabolic.vec3EuclideanNorm (buGaussianShiftedCutoffField ρ hρ ε v z) ^ 2 + CKN.spatialGradientSq (buGaussianShiftedCutoffField ρ hρ ε v) (buGaussianShiftedCutoffDw ρ hρ ε v Dv) z) ≤ Real.exp (4 / 3) * (9 + 2 * √6) * ∫ (z : CKN.Foundation.Parabolic.ParabolicPoint) in CKN.spaceTimeSet Set.univ (Set.Ioo 0 2), CKN.gaussCarlemanTimeWeight z.2 ^ (-2 * a) * Real.exp (-CKN.Foundation.Parabolic.vec3EuclideanNorm z.1 ^ 2 / (4 * z.2)) * (CKN.Foundation.Parabolic.vec3EuclideanNorm fun (i : Fin 3) =>
buGaussianShiftedCutoffDtw ρ hρ ε v Dtv z i + ∑ j : Fin 3, buGaussianShiftedCutoffD2w ρ hρ ε v Dv D2v z i j j) ^ 2
The translated cutoff of rescaled data is an admissible input for the Gaussian Carleman estimate, with its explicit constant.