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Local metrics of the Gaussian free field

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arxiv 1905.00379 v2 pith:XLURZZJ3 submitted 2019-05-01 math.PR math-phmath.MP

classification math.PRmath-phmath.MP
keywords localmetricconceptfieldfreegammagaussianmetrics
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abstract

We introduce the concept of a local metric of the Gaussian free field (GFF) $h$, which is a random metric coupled with $h$ in such a way that it depends locally on $h$ in a certain sense. This definition is a metric analog of the concept of a local set for $h$. We establish general criteria for two local metrics of the same GFF $h$ to be bi-Lipschitz equivalent to each other and for a local metric to be a.s. determined by $h$. Our results are used in subsequent works which prove the existence, uniqueness, and basic properties of the $\gamma$-Liouville quantum gravity (LQG) metric for all $\gamma \in (0,2)$, but no knowledge of LQG is needed to understand this paper.

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  1. Random surfaces and Liouville quantum gravity

    math.PR 2019-08 unverdicted

    An expository overview of the definition of Liouville quantum gravity surfaces, the three senses in which random planar maps converge to them, and the major open problems.

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