ScalingStacks

Lemma 4.7 . [01AL]

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Lemma 4.7.

Suppose φ\varphi, ψ\psi and φ1,…,φn\varphi_{1},\dots,\varphi_{n} are bounded ω\omega-psh functions such that −M≤φ≤ψ≤0-M\leq\varphi\leq\psi\leq 0 and −M≤ui≤0-M\leq u_{i}\leq 0, where M≥1M\geq 1. Then

0≤∫(ψ−φ)​MA⁡(φ1,…,φn)≤4​M​(∫(ψ−φ)​MA⁡(φ2))12n.0\leq\int(\psi-\varphi)\MA(\varphi_{1},\dots,\varphi_{n})\leq 4M\left(\int(\psi-\varphi)\MA(\frac{\varphi}{2})\right)^{\frac{1}{2^{n}}}.

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