The Fourier-transform criterion for periodic and divergent trajectories

From papers

Let H:ZZH:\mathbb{Z}\to\mathbb{Z} be a contracting, semi-basic pp-Hydra map, and let χ^H\widehat{\chi}_H be a Fourier transform of its numen. Fourier-transform dynamical criterion. (I) HH has finitely many periodic points if and only if

lim inftpχ^H(t)qH=0.\liminf_{|t|_p\to\infty}|\widehat{\chi}_H(t)|_{q_H}=0.

(II) If

lim inftpχ^H(t)qH>0,\liminf_{|t|_p\to\infty}|\widehat{\chi}_H(t)|_{q_H}>0,

then HH has a divergent trajectory. The source presents these as desired conjectural links between Fourier behavior and dynamics; no resolution is supplied.

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Sources & referencesView supporting material

Primary source

Maxwell Charles Siegel, “(p,q)-adic Analysis and the Collatz Conjecture”, arXiv:2412.02902 (2024).

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