ScalingStacks

Lemma 5.5 [0327]

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Lemma 5.5

Let Gϵ,t​(x,y)G_{\epsilon,t}(x,y) denote Green’s function for the Laplacian Δϵ,t\Delta_{\epsilon,t} associated to the metric ωϵ,t\omega_{\epsilon,t}, normalised so that ∫XGϵ,t​(x,y)​ωϵ,t2​(x)=0\int_{X}G_{\epsilon,t}(x,y)\,\omega^{2}_{\epsilon,t}(x)=0. Then, for ϵ\epsilon sufficiently small and any t∈[0,1]t\in[0,1],

Gϵ,t​(x,y)≥−A​ϵ−4,G_{\epsilon,t}(x,y)\geq-A\epsilon^{-4},

for some constant AA independent of ϵ\epsilon and tt.

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