A Criterion for Potentially Good Reduction in Non-archimedean Dynamics
classification
🧮 math.NT
math.DS
keywords
goodnon-archimedeanpotentiallyreductionconditioncriteriondegreedetermines
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Let K be a non-archimedean field, and let f in K(z) be a polynomial or rational function of degree at least 2. We present a necessary and sufficient condition, involving only the fixed points of f and their preimages, that determines whether or not the dynamical system f on P^1 has potentially good reduction.
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