Number Theory

    

On the Iterative Convergence of Fermat Numbers Through Continued Fractions

Authors: S. Mayank

This paper presents a novel iterative representation of Fermat numbers, defined by the sequence Fn = 2^(2^n) + 1. By leveraging the fundamental recurrence relation F(n+1) - 2 = Fn(Fn - 2), we define a functional equation x = A/x - 2, where A = F(n+1) - 2. We demonstrate that this equation yields two integer solutions, x1 = Fn - 2 and x2 = -Fn. Through an analysis of the derivative of the map f(x) = A/x - 2, we prove that x = -Fn is an attractive fixed point and x = Fn - 2 is a repulsive fixed point, leading to a unique, convergent infinite continued fraction for the negative of any Fermat number. This provides a bridge between the rapid growth of Fermat sequences and the stability of iterative rational functions.

Comments: 3 Pages. (Note by viXra Admin: Please cite and list scientific references)

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[v1] 2026-04-15 19:40:31

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