On a characterization of polynomials among rational functions in non-archimedean dynamics

preprint2020arXivOpen access

Abstract

We study a question on characterizing polynomials among rational functions of degree >1>1 on the projective line over an algebraically closed field that is complete with respect to a non-trivial and non-archimedean absolute value, from the viewpoint of dynamics and potential theory on the Berkovich projective line.

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