Documentation

LeanPool.NavierStokesAndEuler.Euler.MetricRootLimit

Removal of square-root regularization in actual finite metric-energy integral inequalities.

theorem EulerMetricRootLimit.regularized_root_le (q δ : ) (hq : 0 q) ( : 0 δ) :
(q + δ ^ 2) q + δ

A regularized square root differs from the nonnegative root by at most the regularization.

The canonical positive regularization sequence converges at every quadratic energy value.

theorem EulerMetricRootLimit.root_integral_limit (Q A F : ) (s t : ) (hst : s t) (hQ : ContinuousOn Q (Set.Icc s t)) (hQ0 : uSet.Icc s t, 0 Q u) (hA : MeasureTheory.IntegrableOn A (Set.Icc s t) MeasureTheory.volume) (hF : MeasureTheory.IntegrableOn F (Set.Icc s t) MeasureTheory.volume) (hineq : ∀ (δ : ), 0 < δ(Q t + δ ^ 2) - (Q s + δ ^ 2) (u : ) in s..t, A u * (Q u + δ ^ 2) + F u) :
(Q t) - (Q s) (u : ) in s..t, A u * (Q u) + F u

At fixed finite cutoff, an integrable energy inequality survives removal of the root regularization.

theorem EulerMetricRootLimit.family_energy_integral_bound {ι : Type u_1} {H : Type u_2} [Fintype ι] [NormedAddCommGroup H] [InnerProductSpace H] (K : H →L[] H) (e : ιH) (s t c ν : ) (K' : H →L[] H) (e' transport pressure forcing lap : ιH) (B C : ) (hst : s t) (hc : 0 < c) ( : 0 ν) (hKc : ContinuousOn K (Set.Icc s t)) (hec : ∀ (i : ι), ContinuousOn (e i) (Set.Icc s t)) (hB : uSet.Ioo s t, 0 B u) (hC : uSet.Ioo s t, 0 C u) (hcoercive : uSet.Icc s t, ∀ (v : H), c ^ 2 * v ^ 2 inner ((K u) v) v) (hKd : uSet.Ioo s t, HasDerivAt K (K' u) u) (hed : ∀ (i : ι), uSet.Ioo s t, HasDerivAt (e i) (e' i u) u) (hsym : uSet.Ioo s t, ∀ (v w : H), inner ((K u) v) w = inner v ((K u) w)) (heq : ∀ (i : ι), uSet.Ioo s t, e' i u + transport i u + pressure i u = forcing i u + ν lap i u) (hp : ∀ (i : ι), uSet.Ioo s t, inner ((K u) (e i u)) (pressure i u) = 0) (ht : ∀ (i : ι), uSet.Ioo s t, |inner ((K u) (e i u)) (transport i u)| B u * e i u ^ 2) (hheat : ∀ (i : ι), uSet.Ioo s t, inner ((K u) (e i u)) (lap i u) C u * e i u ^ 2) (hAint : MeasureTheory.IntegrableOn (fun (u : ) => (K' u + 2 * B u + 2 * ν * C u) / (2 * c ^ 2)) (Set.Icc s t) MeasureTheory.volume) (hFint : MeasureTheory.IntegrableOn (fun (u : ) => K u / c * EulerFiniteMetricEnergy.familyNorm fun (i : ι) => forcing i u) (Set.Icc s t) MeasureTheory.volume) :
((EulerFiniteMetricEnergy.familyMetricNorm (K t) fun (i : ι) => e i t) - EulerFiniteMetricEnergy.familyMetricNorm (K s) fun (i : ι) => e i s) (u : ) in s..t, ((K' u + 2 * B u + 2 * ν * C u) / (2 * c ^ 2) * EulerFiniteMetricEnergy.familyMetricNorm (K u) fun (i : ι) => e i u) + K u / c * EulerFiniteMetricEnergy.familyNorm fun (i : ι) => forcing i u

The unregularized finite-family energy obeys an integral inequality even when the norm vanishes.