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Definition 4.19 (Weight function) . [052W]

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Definition 4.19 (Weight function).

Given fixed real parameters n≥2n\geq 2, T>103T>10^{3}, δ>0\delta>0, ν,μ∈ℝ\nu,\mu\in\mathbb{R} and α∈(0,1)\alpha\in(0,1). For each k∈ℕk\in\mathbb{N}, the weight function ρδ,ν,μ(k+α)\rho_{\delta,\nu,\mu}^{(k+\alpha)} is defined as follows,

(4.273) ρδ,ν,μ(k+α)​(𝒙)=eδ⋅UT​(𝒙)⋅𝔰​(𝒙)ν+k+α⋅Tμ,\displaystyle\rho_{\delta,\nu,\mu}^{(k+\alpha)}(\bm{x})=e^{\delta\cdot U_{T}(\bm{x})}\cdot\mathfrak{s}(\bm{x})^{\nu+k+\alpha}\cdot T^{\mu},

where 𝔰⁡(𝐱)\mathfrak{s}(\bm{x}) is the regularity scale at 𝐱\bm{x} given by Proposition 4.18 and

(4.274) UT​(𝒙)\displaystyle U_{T}(\bm{x}) ≡T⁡(1−(LT​(𝒙)T)n2),\displaystyle\equiv T\Big(1-(\frac{L_{T}(\bm{x})}{T})^{\frac{n}{2}}\Big),
(4.275) LT​(𝒙)\displaystyle L_{T}(\bm{x}) ≡LT​(z⁡(𝒙))=T+L0​(z⁡(𝒙)),\displaystyle\equiv L_{T}(z(\bm{x}))=T+L_{0}(z(\bm{x})),

where the functions LTL_{T} and L0L_{0} are defined in (4.12).

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