Abstract
We initiate a detailed study of the ramification locus for projective endomorphisms of the Berkovich projective line—the non-Archimedean analog of the Riemann sphere.
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Faber, X. Topology and geometry of the Berkovich ramification locus for rational functions, I. manuscripta math. 142, 439–474 (2013). https://doi.org/10.1007/s00229-013-0611-4
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DOI: https://doi.org/10.1007/s00229-013-0611-4