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3.3 Uniform L∞L^{\infty}-estimate

We recall the following result proved using Kolodziej’s pluripotential theoretic methods (cf. [16, section 2.2] for an exposition based on [8][9]):

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Theorem 3.1. Let (Y,ω)(Y,\omega) be a compact Kähler manifold, and the Kähler potential ϕ\phi solves the complex Monge-Ampère equation

(ω+−1​∂∂¯​ϕ)n∫Yωn=d​μ,supϕ=0.\frac{(\omega+\sqrt{-1}\partial\bar{\partial}\phi)^{n}}{\int_{Y}\omega^{n}}=d\mu,\quad\sup\phi=0.

Assume there are positive constants α,A\alpha,A, such that the Skoda type estimate (1) holds for (Y,ω,d​μ)(Y,\omega,d\mu):

∫Ye−α​u​𝑑μ≤A,∀u∈P​S​H​(Y,ω)​ with ​supYu=0.\int_{Y}e^{-\alpha u}d\mu\leq A,\quad\forall u\in PSH(Y,\omega)\text{ with }\sup_{Y}u=0.

Then ‖ϕ‖C0≤C⁡(n,α,A)\left\lVert\phi\right\rVert_{C^{0}}\leq C(n,\alpha,A).

The uniform L∞L^{\infty}-estimate for the Calabi-Yau potentials in Theorem 1.4 is an immediate consequence.

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