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LeanPool.CaffarelliKohnNirenberg.Core.Step4.PressureGradientOriginClauseDerivative

Clipped origin growth from the fixed derivative decomposition #

The harmonic and far-force temporal envelope is the same input as in the fixed-field derivative construction. A finite relative cover of the backward origin carrier transfers the local signed decompositions to one measurable weak gradient. Its actual clipped spatial norms supply the growth estimate. The finite-cover argument uses the same-repository collar assembly pattern; its backward patches include the final time without requiring future Morrey data.

Backward patches up to the final time of an origin carrier #

Relative neighborhoods of the closed inner carrier are covered by spatial half-balls and backward windows contained in the larger Morrey carrier. At final time zero the neighborhood extends past zero, while its intersection with the carrier is still controlled by a backward window ending at zero.

A closed-carrier point has a relatively open neighborhood controlled by one fixed backward localization entirely inside the larger carrier.

Closed cylinder containment gives the exact spatial ball and backward window as a local suitable-solution box.

The closure of a backward origin carrier is compact.

theorem CKN.Core.Step4.originClause_derivative_morrey_of_shared_remainder (hrem : ∀ {Ω : Set Foundation.Parabolic.Vec3} {I : Set ℝ} {q : ℝ} {u : Foundation.Parabolic.ParabolicPoint → Foundation.Parabolic.Vec3} {Du : Foundation.Parabolic.ParabolicPoint → Fin 3 → Foundation.Parabolic.Vec3} {p : Foundation.Parabolic.ParabolicPoint → ℝ} {f : Foundation.Parabolic.ParabolicPoint → Foundation.Parabolic.Vec3}, IsSuitableWeakSolutionIntegrable Ω I q u Du p f → ∀ {z : Foundation.Parabolic.ParabolicPoint} {ρ : ℝ} (hρ : 0 < ρ), closure (Foundation.Parabolic.parabolicCylinder z.1 z.2 ρ) ⊆ spaceTimeSet Ω I → ∃ (M : ℝ → ENNReal), AEMeasurable M MeasureTheory.volume ∧ ∫⁻ (s : ℝ), M s ^ (3 / 2) < ⊤ ∧ ∀ᵐ (s : ℝ) ∂MeasureTheory.volume.restrict (Set.Ioc (z.2 - ρ ^ 2) z.2), ∀ (i : Fin 3), ∀ x ∈ Foundation.Parabolic.vec3Ball z.1 (ρ / 2), ‖classicalGradient (harmonicPressurePart (mollifiedBallCutoff z.1 hρ) u (sourceSliceCentredMean z.1 ρ u) p s + pressureP8 (mollifiedBallCutoff z.1 hρ) f s) x i‖ₑ ≤ M s) {q τ R₀ R₁ : ℝ} {KU KD : ENNReal} (hq : 5 / 2 < q) (hτ : 25 / 3 ≤ τ) (hτhi : τ ≤ 25) (hR₁ : 0 < R₁) (hgap : R₁ < R₀) (hR₀ : R₀ < 1) (hKU : KU < ⊤) (hKD : KD < ⊤) {Ω : Set Foundation.Parabolic.Vec3} {I : Set ℝ} {u : Foundation.Parabolic.ParabolicPoint → Foundation.Parabolic.Vec3} {Du : Foundation.Parabolic.ParabolicPoint → Fin 3 → Foundation.Parabolic.Vec3} {p : Foundation.Parabolic.ParabolicPoint → ℝ} {f : Foundation.Parabolic.ParabolicPoint → Foundation.Parabolic.Vec3} (hsol : IsSuitableWeakSolutionIntegrable Ω I q u Du p f) (hdom : closure (Foundation.Parabolic.parabolicCylinder 0 0 1) ⊆ spaceTimeSet Ω I) (hU : ∀ (i : Fin 3), Foundation.Parabolic.Morrey.morreyNorm 3 τ ((Foundation.Parabolic.parabolicCylinder 0 0 R₀).indicator fun (w : Foundation.Parabolic.ParabolicPoint) => u w i) ≤ KU) (hDu : ∀ (i j : Fin 3), Foundation.Parabolic.Morrey.morreyNorm 2 (25 / 8) ((Foundation.Parabolic.parabolicCylinder 0 0 R₀).indicator fun (w : Foundation.Parabolic.ParabolicPoint) => Du w i j) ≤ KD) :

The fixed harmonic/far temporal-envelope input gives finite Morrey norms of one selected weak pressure derivative on the entire backward origin carrier. Only the original larger-carrier velocity and gradient Morrey data are used.

theorem CKN.Core.Step4.originClause_clipped_growth_of_shared_remainder (hrem : ∀ {Ω : Set Foundation.Parabolic.Vec3} {I : Set ℝ} {q : ℝ} {u : Foundation.Parabolic.ParabolicPoint → Foundation.Parabolic.Vec3} {Du : Foundation.Parabolic.ParabolicPoint → Fin 3 → Foundation.Parabolic.Vec3} {p : Foundation.Parabolic.ParabolicPoint → ℝ} {f : Foundation.Parabolic.ParabolicPoint → Foundation.Parabolic.Vec3}, IsSuitableWeakSolutionIntegrable Ω I q u Du p f → ∀ {z : Foundation.Parabolic.ParabolicPoint} {ρ : ℝ} (hρ : 0 < ρ), closure (Foundation.Parabolic.parabolicCylinder z.1 z.2 ρ) ⊆ spaceTimeSet Ω I → ∃ (M : ℝ → ENNReal), AEMeasurable M MeasureTheory.volume ∧ ∫⁻ (s : ℝ), M s ^ (3 / 2) < ⊤ ∧ ∀ᵐ (s : ℝ) ∂MeasureTheory.volume.restrict (Set.Ioc (z.2 - ρ ^ 2) z.2), ∀ (i : Fin 3), ∀ x ∈ Foundation.Parabolic.vec3Ball z.1 (ρ / 2), ‖classicalGradient (harmonicPressurePart (mollifiedBallCutoff z.1 hρ) u (sourceSliceCentredMean z.1 ρ u) p s + pressureP8 (mollifiedBallCutoff z.1 hρ) f s) x i‖ₑ ≤ M s) {q τ R₀ R₁ : ℝ} {KU KD : ENNReal} (hq : 5 / 2 < q) (hτ : 25 / 3 ≤ τ) (hτhi : τ ≤ 25) (hR₁ : 0 < R₁) (hgap : R₁ < R₀) (hR₀ : R₀ < 1) (hKU : KU < ⊤) (hKD : KD < ⊤) {Ω : Set Foundation.Parabolic.Vec3} {I : Set ℝ} {u : Foundation.Parabolic.ParabolicPoint → Foundation.Parabolic.Vec3} {Du : Foundation.Parabolic.ParabolicPoint → Fin 3 → Foundation.Parabolic.Vec3} {p : Foundation.Parabolic.ParabolicPoint → ℝ} {f : Foundation.Parabolic.ParabolicPoint → Foundation.Parabolic.Vec3} (hsol : IsSuitableWeakSolutionIntegrable Ω I q u Du p f) (hdom : closure (Foundation.Parabolic.parabolicCylinder 0 0 1) ⊆ spaceTimeSet Ω I) (hU : ∀ (i : Fin 3), Foundation.Parabolic.Morrey.morreyNorm 3 τ ((Foundation.Parabolic.parabolicCylinder 0 0 R₀).indicator fun (w : Foundation.Parabolic.ParabolicPoint) => u w i) ≤ KU) (hDu : ∀ (i j : Fin 3), Foundation.Parabolic.Morrey.morreyNorm 2 (25 / 8) ((Foundation.Parabolic.parabolicCylinder 0 0 R₀).indicator fun (w : Foundation.Parabolic.ParabolicPoint) => Du w i j) ≤ KD) :

The actual clipped slice norms of one selected derivative obey the origin clause's growth formula with a single finite coefficient before all components, centres, and positive radii. The only analytic input beyond the standing solution data is the shared fixed harmonic/far temporal envelope.