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LeanPool.Superdiffusion.Algsuperdiff.Section4.Provider.Homogenization.HomSpineEnergyDensity

HomSpineEnergyDensity #

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

The per-cube energy density at EVERY depth, from Theorem C #

What this file supplies #

The §4.5 supplier's energy slot (hS0, hS, hSbound) needs the printed per-cube energy ‖σ^{1/2}∇u‖_{L²(R)} — this repository's printedLocalEnergy at the cutoff coefficient field — bounded at EVERY depth j ≤ m below □_m. Theorem C (anomalous_regularity) gives the display only on the deep range X_m(α) ≤ m - n's "Hence, for every j ≤ m" silently extends it. This file supplies both halves of that extension at the printed carriers:

The display, sliced #

RegularityEnergyDisplay is the root's FIRST conjunct with its three-term bracket abstracted as one [0,∞] value T. Nothing is added: the binder shape, the window ((x+□_n) ∩ □_m), the measure, the integrand and the factor C·3^{(1-α)(m-n)} are byte-for-byte the statement's. The deep gate is written (X: ℤ) ≤ m - n — at n ≤ m this is the X ω ≤ (m-n).toNat with a finite cut of the ℕ∞-valued minimal scale.

1. The carrier identity #

The normalized volume measure of the OPEN cube is CoarseGraining's normalized cube measure: the two realizations of a triadic cube differ by a null set.

The ν-drop, pointwise. The symmetric part of the cutoff coefficient field is ν Id (Cutoff.symmPart_coefficientCutoff), so the printed energy density is literally ν |∇u|². An identity: no ellipticity ratio is spent.

The Euclidean magnitude of an H¹ gradient is a.e. strongly measurable for the normalized volume measure of any subwindow of the domain.

THE CARRIER IDENTITY.

The printed per-cell energy of the cutoff field on a subcube R of □_m is exactly Theorem C's left-hand side read on R's own window:

  ‖σ^{1/2}∇u‖_{L²(R)}  =  √ν · ‖∇u‖_{L²(R)}.

Both sides are ENNReal.ofReal-cut of the same finite quantity; the only step is the pointwise ν-drop, which is an identity.

2. The display, sliced at one sample #

Theorem C's energy-density display, sliced.

The FIRST conjunct of anomalous_regularity at one ω, one L and one solution, with the printed three-term bracket abstracted as a single [0,∞] value T. The window, the measure, the integrand, the factor and the deep gate are the statement's own; nothing is added.

Creg is the constant C, alpha the α, and X a finite cut of the minimal scale X_m(α)(ω).

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    3. The deep range #

    The deep range, by one application of the display at the descendant's own lattice centre. latticeTranslate_of_mem_descendantsAtDepth identifies the descendant with the printed translate z + □_{m-j}, and the intersection with □_m is the descendant itself.

    4. The shallow range: the sub-cube average step #

    THE SUB-CUBE AVERAGE STEP (at the energy carrier).

    A shallow cube's normalized energy is the volume-weighted average of its depth-X descendants' energies — CoarseGraining's exact triadic partition identity, routed through cubeAverage_le_of_descendants — hence at most their maximum, each of which the deep display bounds. No volume factor 3^{(d/2)(m-j)} is paid; the printed 3^{(1-α)X_m(α)} is created exactly here.

    5. The two halves joined #

    THE DISPLAY AT EVERY DEPTH ("Hence, for every j ≤ m").

    At every depth j below □_m — deep or shallow — the printed per-cube energy obeys the same bound with the single extra factor 3^{(1-α)X}, which is ≥ 1 and is the manuscript's own minimal-scale factor.