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On the stopping time of the Collatz map in $\mathbb{F}_2[x]$

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arxiv 2401.03210 v1 pith:PVW3A3ZR submitted 2024-01-06 math.CO math.NT

classification math.COmath.NT
keywords collatzstoppingboundmathbbsequencestimearithmeticcertain
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abstract

We study the stopping time of the Collatz map for a polynomial $f \in \mathbb{F}_2[x]$, and bound it by $O({\rm deg} (f)^{1.5})$, improving upon the quadratic bound proven by Hicks, Mullen, Yucas and Zavislak. We also prove the existence arithmetic sequences of unbounded length in the stopping times of certain sequences of polynomials, a phenomenon observed in the classical Collatz map.

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