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Definition 4.21 (Weighted Hölder space) . [0532]

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Definition 4.21 (Weighted Hölder space).

Let 𝒦⊂ℳT\mathcal{K}\subset\mathcal{M}_{T} be compact, then the weighted Hölder norm of a tensor field χ∈Tr,s​(𝒦)\chi\in T^{r,s}(\mathcal{K}) of type (r,s)(r,s) is defined by,

(4.285) ‖χ‖Cδ,ν,μk,α​(𝒦)\displaystyle\|\chi\|_{C_{\delta,\nu,\mu}^{k,\alpha}(\mathcal{K})} ≡∑m=0k‖ρδ,ν,μ(m)⋅∇mχ‖C0​(𝒦)+[χ]Cδ,ν,μk,α​(𝒦),\displaystyle\equiv\sum\limits_{m=0}^{k}\Big\|\rho_{\delta,\nu,\mu}^{(m)}\cdot\nabla^{m}\chi\Big\|_{C^{0}(\mathcal{K})}+[\chi]_{C_{\delta,\nu,\mu}^{k,\alpha}(\mathcal{K})},
(4.286) [χ]Cδ,ν,μk,α​(𝒦)\displaystyle[\chi]_{C_{\delta,\nu,\mu}^{k,\alpha}(\mathcal{K})} ≡supdg​(x,y)≤ι0x,y∈𝒦{min⁡{ρδ,ν,μ(k+α)​(x),ρδ,ν,μ(k+α)​(y)}⋅|∇kχ​(x)−∇kχ​(y)|(dg​(x,y))α},\displaystyle\equiv\sup_{\begin{subarray}{c}d_{g}(x,y)\leq\iota_{0}\\ x,y\in\mathcal{K}\end{subarray}}\Big\{\min\{\rho_{\delta,\nu,\mu}^{(k+\alpha)}(x),\rho_{\delta,\nu,\mu}^{(k+\alpha)}(y)\}\cdot\frac{|\nabla^{k}\chi(x)-\nabla^{k}\chi(y)|}{(d_{g}(x,y))^{\alpha}}\Big\},

where ι0≡14​InjRadg⁡(ℳ)\iota_{0}\equiv\frac{1}{4}\InjRad_{g}(\mathcal{M}). In the above definition, the difference of the two covariant derivatives is defined in terms of the parallel translation along the minimal geodesic.

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