Is Admissible Drift

Supporting results for the Constantin–Ignatova–Vicol axisymmetric regularity theorem.

def CIV.IsAdmissibleDrift (m : ℕ) (I : Set ℝ) (B : CKN.Vec m × ℝ → CKN.Vec m) (divB : CKN.Vec m × ℝ → ℝ) : Prop

The drift class eq:aniso:comparison:drift: B measurable with measurable divergence div B, and for every compact J ⊆ I one constant Λ such that for a.e. τ ∈ J the slice B(·, τ) is bounded and Lipschitz with constant Λ, and divB(·, τ) is bounded by Λ and is the weak divergence of B(·, τ).

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