The positive finite-rate conjecture for the distributional asymptotics of (logbn)(\log_b n) modulo 1

Let bb be the base, let νN\nu_N denote the empirical distribution associated with the fractional parts of (logbn)(\log_b n) up to NN, let EbE_b be the relevant exponential distribution, let RlogbN1R^{-1}_{\langle-\log_b N\rangle} denote rotation by logbN-\log_b N modulo 11, and let dTd_{\mathbb{T}} be the metric on probability measures on the circle T\mathbb{T}. Positive finite-rate conjecture.

0<lim infNNlogNdT(νN,EbRlogbN1)lim supNNlogNdT(νN,EbRlogbN1)<.0<\liminf_{N\to\infty}\frac{N}{\sqrt{\log N}}d_{\mathbb{T}}(\nu_N,E_b\circ R^{-1}_{\langle-\log_bN\rangle})\le\limsup_{N\to\infty}\frac{N}{\sqrt{\log N}}d_{\mathbb{T}}(\nu_N,E_b\circ R^{-1}_{\langle-\log_bN\rangle})<\infty.

The conjecture asserts that the normalized convergence rate is bounded above and bounded away from zero, complementing the paper's upper-bound estimate and predicting the correct order of convergence.

Sources & referencesView supporting material

Primary source

Chuang Xu, “Distributional asymptotics mod 1 of (_bn)”, arXiv:1609.08207 (2019).

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