Quantitative convergence conjecture for partial Stirling functions

From papers

Let xZ2x\in\mathbb Z_2 be a finite element, and let i0i_0 and dd be positive integers such that xi0=0x_{i_0}=0 and xi+d=xix_{i+d}=x_i for all ii0i\ge i_0, with 2i+dx2^{i+d}\le x. Define

R(x):=lg(x)+1(i0+d),R(x):=\operatorname{lg}(x)+1-(i_0+d),

the number of repeating bits of xx. The quantitative convergence conjecture. Provided R(x)2(ei0)1R(x)\ge2(e-i_0)-1, one has

ν(P2e+d+1(x+1)P2e+1(x+1))ei0.\nu\bigl(P_{2^{e+d}+1}(x+1)-P_{2^e+1}(x+1)\bigr)\ge e-i_0.

This gives an explicit lower bound on the 2-adic closeness of successive terms in the periodic subsequences.

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Sources & referencesView supporting material

Primary source

Donald M. Davis, “2-adic Stirling functions and their zeros”, arXiv:1402.0433 (2014).

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