Reprint: On the fractional parts of the powers of a rational number. II (1957)
type: Item
instance of: scholarly article
title: Reprint: On the fractional parts of the powers of a rational number. II (1957)
zbMATH Open document ID: 1465.11023
published in: Documenta Mathematica
publication date: 2021-03-05T00:00:00Z
review text: Summary: Let \(\|x\|\) denote the distance of the real number \(x\) to the nearest integer. In this paper, Mahler proves that, if \(u\) and \(v\) are coprime integers satisfying \(u>v\ge 2\) and \(\varepsilon>0\) is an arbitrarily small positive number, the inequality \[ \left\|\left(\frac{u}{v}\right)^n\right\|<e^{\varepsilon n} \] is satisfied by at most a finite number of positive integer solutions \(n\). He uses this result to show that, except for a finite number of values \(k\), \[ g(k)=2^k-\left\lfloor\left(\frac{3}{2}\right)^k\right\rfloor-2, \] where \(g(k)\) is the function in Waring's problem. Reprint of the author's paper [Mathematika 4, 122--124 (1957; Zbl 0208.31002)].
Mathematics Subject Classification ID: 11-03
Mathematics Subject Classification ID: 11J25
zbMATH DE Number: 7317824
MaRDI profile type: Publication
full work available at URL: https://doi.org/10.4171/dms/8/33
OpenAlex ID: W4361793045
DOI: 10.4171/DMS/8/33
author: Kurt Mahler
description: scientific article; zbMATH DE number 7317824