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LeanPool.NavierStokesAndEuler.Euler.UnshiftedPressure

The actual pressure inverse in unshifted Gevrey-weighted fixed Sobolev blocks.

theorem EulerWeightedPressure.unshifted_weight_kernel (ρ Rc : ℝ) (hρ : 0 < ρ) (hRc : 0 ≤ Rc) (j l : ℕ) (Z : ℝ) (hZ : 0 ≤ Z) :
EulerPacketWeights.weight ρ (j + l) * ↑((j + l).choose l) * (Rc ^ l * ↑l.factorial ^ 2) * Z ≤ (ρ * Rc) ^ l * (EulerPacketWeights.weight ρ j * Z)

The ordinary Gevrey product weight gains the reciprocal binomial coefficient.

theorem EulerWeightedPressure.unshifted_weighted_inverse (ρ Rc M : ℝ) (hρ : 0 < ρ) (hRc : 0 ≤ Rc) (hM : 1 ≤ M) (hsmall : 4 * M * (ρ * Rc) ≤ 1) (N : ℕ) (A F Z : ℕ → ℝ) (_hF : ∀ (n : ℕ), 0 ≤ F n) (hZ : ∀ (n : ℕ), 0 ≤ Z n) (hA : ∀ (l : ℕ), 1 ≤ l → l ≤ N → A l ≤ Rc ^ l * ↑l.factorial ^ 2) (hrec : ∀ n ≤ N, Z n ≤ M * (F n + ∑ l ∈ Finset.range n, ↑(n.choose (l + 1)) * A (l + 1) * Z (n - (l + 1)))) :
∑ n ∈ Finset.range (N + 1), EulerPacketWeights.weight ρ n * Z n ≤ 2 * M * ∑ n ∈ Finset.range (N + 1), EulerPacketWeights.weight ρ n * F n

Positive-order coefficient terms are absorbed in the unshifted Gevrey sum with a constant independent of the cutoff.

theorem EulerH6Pressure.pressure_unshifted_Hq_bound (period : ℝ) [Fact (0 < period)] {directions : Fin 4 → EulerLiftedGradientSpace.LiftTangent} {s q : ℕ} {A : EulerSpatialSobolevInverse.SmoothCoefficient period} {f : ↥(EulerLiftedGradientSpace.LiftL2 period)} (K : EulerSpatialSobolevInverse.CoefficientJet period directions s A) (J : EulerSpatialSobolevInverse.SpatialJet period directions s f) (κ : ℝ) (m : EulerLiftedGradientSpace.Vector3) (c : ℝ) (hc : 0 < c) (hpos : ∀ (x : EulerLiftedGradientSpace.LiftDomain period) (v : EulerLiftedGradientSpace.Vector3), c * ‖v‖ ^ 2 ≤ inner ℝ ((A.coefficient x) v) v) (N : ℕ) (hN : N + q ≤ s) (hq : q ≤ s) (ρ Rc M : ℝ) (hρ : 0 < ρ) (hRc : 0 ≤ Rc) (hM : 1 ≤ M) (hbase : (CoefficientJet.restrict K q hq).pressureConstant c ≤ M) (hsmall : 4 * M * (ρ * Rc) ≤ 1) (hcoeff : ∀ (l : ℕ), 1 ≤ l → l ≤ N → coefficientBlock period K q l ≤ Rc ^ l * ↑l.factorial ^ 2) :
∑ n ∈ Finset.range (N + 1), EulerPacketWeights.weight ρ n * blockNorm period (EulerSpatialSobolevInverse.SpatialJet.solvePressure K κ m c hc hpos J) q n ≤ 2 * M * ∑ n ∈ Finset.range (N + 1), EulerPacketWeights.weight ρ n * blockNorm period J q n