The Duffin-Schaeffer Conjecture with extra divergence II. / Harman, Glyn; Beresnevich, Victor; Haynes, Alan; Velani, Sanju.

In: Math. Zeit., Vol. 275, 01.10.2013, p. 127–133.

Research output: Contribution to journalArticlepeer-review



In 2012 the authors set out a programme to prove the Duffin–Schaeffer conjecture for measures arbitrarily close to Lebesgue measure. In this paper we take a new step in this direction. Given a non-negative function ψ:N→Rψ:N→R, let W(ψ)W(ψ) denote the set of real numbers xx such that |nx−a|<ψ(n)|nx−a|<ψ(n) for infinitely many reduced rationals a/n (n>0)a/n (n>0). Our main result is that W(ψ)W(ψ) is of full Lebesgue measure if there exists a c>0c>0 such that ∑n≥16φ(n)ψ(n)nexp(c(loglogn)(logloglogn))=∞.
Original languageEnglish
Pages (from-to)127–133
Number of pages7
JournalMath. Zeit.
Early online date4 Dec 2012
Publication statusPublished - 1 Oct 2013
This open access research output is licenced under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

ID: 12048378