English

More Infinite Products: Thue-Morse and the Gamma function

Number Theory 2017-09-13 v2

Abstract

Letting (tn)(t_n) denote the Thue-Morse sequence with values 0,10, 1, we note that the Woods-Robbins product n0(2n+12n+2)(1)tn=21/2 \prod_{n \geq 0} \left(\frac{2n+1}{2n+2}\right)^{(-1)^{t_n}} = 2^{-1/2} involves a rational function in nn and the ±1\pm 1 Thue-Morse sequence ((1)tn)n0((-1)^{t_n})_{n \geq 0}. The purpose of this paper is twofold. On the one hand, we try to find other rational functions for which similar infinite products involving the ±1\pm 1 Thue-Morse sequence have an expression in terms of known constants. On the other hand, we also try to find (possibly different) rational functions RR for which the infinite product R(n)tn\prod R(n)^{t_n} also has an expression in terms of known constants.

Keywords

Cite

@article{arxiv.1709.03398,
  title  = {More Infinite Products: Thue-Morse and the Gamma function},
  author = {Jean-Paul Allouche and Samin Riasat and Jeffrey Shallit},
  journal= {arXiv preprint arXiv:1709.03398},
  year   = {2017}
}
R2 v1 2026-06-22T21:39:04.371Z