ScalingStacks

Lemma 5.3 . [00SN]

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Lemma 5.3.

(Chern-Levine type estimate) Let uu be a psh function on the annulus region U={|log⁡|zi||<s,∀i}⊂(ℂ∗)nU=\{|\log|z_{i}||<s,\forall i\}\subset(\mathbb{C}^{*})^{n}, with ‖u‖L∞≲1\left\lVert u\right\rVert_{L^{\infty}}\lesssim 1. Then

  • •

    On the shrinked set E={|log|zi||<s/2}E=\{|\log|z_{i}||<s/2\} the measure

    ∫E(−1​∂∂¯​u)n≤C​s−n.\int_{E}(\sqrt{-1}\partial\bar{\partial}u)^{n}\leq Cs^{-n}.
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    Let u+vu+v is another psh function, with ‖v‖L∞≪1\left\lVert v\right\rVert_{L^{\infty}}\ll 1. Let ff be any compactly supported function on the square {|xi|<1}⊂ℝn\{|x_{i}|<1\}\subset\mathbb{R}^{n}. Then

    ∫f⁡{(−1​∂∂¯​(u+v))n−(−1​∂∂¯​u)n}≤C​s−n​‖f‖C2​‖v‖L∞.\int f\{(\sqrt{-1}\partial\bar{\partial}(u+v))^{n}-(\sqrt{-1}\partial\bar{\partial}u)^{n}\}\leq Cs^{-n}\left\lVert f\right\rVert_{C^{2}}\left\lVert v\right\rVert_{L^{\infty}}.

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