From Gaussian averages to summable cell bounds #
The local energy estimate and Gaussian average produce the dyadic normal tail required for summing all short-time cells.
theorem
ESS.bu_short_cell_average_algebra
(β G b Cw Ce Cg I Avg : ℝ)
(hβ : 0 < β)
(hGtan : G ≤ 1 / 16)
(hGnorm : G ≤ β / 48)
(hbβ : b ≤ β / 48)
(hCw : 0 ≤ Cw)
(hCe : 0 ≤ Ce)
(hCg : 0 ≤ Cg)
(k : ℤ)
(hk : 1 ≤ k)
(m : Fin 3 → ℤ)
(ell : Fin 2048)
(hY : 2 ≤ (CKN.Foundation.buSmallTimeDyadicCellCenter k m ell).1 2)
(hI :
I ≤ have d := CKN.Foundation.buSmallTimeDyadicScale k;
have Y := (CKN.Foundation.buSmallTimeDyadicCellCenter k m ell).1;
Cw * Real.exp (-(Y 0 ^ 2 + Y 1 ^ 2) / 8) * Real.exp (b * Y 2 ^ 2) * (Ce / d) * Avg)
(hAvg :
Avg ≤ have d := CKN.Foundation.buSmallTimeDyadicScale k;
have Y := (CKN.Foundation.buSmallTimeDyadicCellCenter k m ell).1;
Cg * d ^ 2 * Real.exp (G * (Y 0 ^ 2 + Y 1 ^ 2 + Y 2 ^ 2)) * Real.exp (-(β * Y 2 ^ 2 / (12 * d))))
:
A cell integral bounded by its Gaussian velocity average has a
summable lattice majorant (lem:bu-small-time).