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LeanPool.Superdiffusion.Algsuperdiff.Section4.Provider.ExcessDecay.InteriorAssemblyAnchorShape

InteriorAssemblyAnchorShape #

Ported from scottnarmstrong/Superdiffusion at 7f20476385d4af418f110303085ad0740c9eba46. Module imports, support namespace and local option directives adapted for Lean Pool.

The anchor-shape weakening of the correction leg #

The composed correction leg of InteriorGlue is stronger than the frozen statement's second interior summand: it carries the honest s^{-1/2} where the anchor prints s^{-7}, and the honest σ_{n+2} where the anchor prints σ_n. This module records the weakening, so that the composed estimate can be read in the anchor's own printed shape:

   σ_{n+2}^{-1} · 3^{n} · (correction leg)
       ≤ C(d) · s^{-7} · σ_n^{-1} · 3^{(1+s)n} · [g]_{H^s(x+□_n)} ,

which is exactly the frozen statement's

   C s^{-7} σ_n^{-1} 3^{(1+s)n} [g]_{H^s(W)}

with C = 4 · interiorCorrectionConst d. Two steps, both priced and both one-directional:

The prefactor σ_{n+2}^{-1} · 3^{n} is exactly what dividing the harmonic display of the child-frame composition by its own left-hand weight σ · cubeBesovScaleWeight 1 (□_n) = σ · 3^{-n} produces, at the comparator choice σ := σ_{n+2} (the index of the parent's flux correction and of the anchor's error slot).

No γ-move is made anywhere; the regime is the anchor's own γ ≤ C^{-1} c⋆^{10}.

References #

1. The two one-directional moves #

The scale weights combine to the printed 3^{(1+s)n}.

theorem Algsuperdiff.Section4.Provider.ExcessDecay.interior_comparison_window_data {d : ℕ} {n m : ℤ} {x z : HCPolySupport.Vec d} {s : ℝ} (hz : z ∈ HCPolySupport.openCubeSet (HCPolySupport.originCube d m)) (hgeom : (fun (y : HCPolySupport.Vec d) => x + y) '' HCPolySupport.openCubeSet (HCPolySupport.originCube d n) ⊆ (fun (y : HCPolySupport.Vec d) => z + y) '' HCPolySupport.openCubeSet (HCPolySupport.originCube d (n + 1)) ∩ HCPolySupport.openCubeSet (HCPolySupport.originCube d m)) (hfr : (fun (y : HCPolySupport.Vec d) => z + y) '' HCPolySupport.openCubeSet (HCPolySupport.originCube d (n + 2)) ∩ frontier (HCPolySupport.openCubeSet (HCPolySupport.originCube d m)) = ∅) {g : HCPolySupport.Vec d → HCPolySupport.Vec d} (hg : MeasureTheory.MemLp g 2 (Support.normalizedVolumeMeasureOn (HCPolySupport.openCubeSet (HCPolySupport.originCube d m)))) (hgW : MeasureTheory.MemLp (HCPolySupport.Gagliardo.gagliardoKernel s 2 g) 2 (Support.normalizedGagliardoMeasureOn (HCPolySupport.openCubeSet (HCPolySupport.originCube d m)))) :

Restrict clause-(iv) data to the frontier-empty parent window and its child. The result is independent of the coefficient slot used by the comparison.