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Every planar graph with the Liouville property is amenable

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We introduce a strengthening of the notion of transience for planar maps in order to relax the standard condition of bounded degree appearing in various results, in particular, the existence of Dirichlet harmonic functions proved by Benjamini and Schramm. As a corollary we obtain that every planar non-amenable graph admits Dirichlet harmonic functions. This is joint work with Agelos Georgakopoulos.

This talk is part of the Probability series.

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