Abstract
It is known that the discrepancy DN{ kx} of the sequence { kx} satisfies NDN{ kx} = O((log N) (log log N) 1 + ε) a.e. for all ε> 0 , but not for ε= 0. For nk= θk, θ> 1 we have NDN{ nkx} ≦ (Σ θ+ ε) (2 Nlog log N) 1 / 2 a.e. for some 0 < Σ θ< ∞ and N≧ N0 if ε> 0 , but not for ε< 0. In this paper we prove, extending results of Aistleitner–Larcher [6], that for any sufficiently smooth intermediate speed Ψ (N) between (log N) (log log N) 1 + ε and (Nlog log N) 1 / 2 and for any Σ > 0 , there exists a sequence { nk} of positive integers such that NDN{ nkx} ≦ (Σ + ε) Ψ (N) eventually holds a.e. for ε> 0 , but not for ε< 0. We also consider a similar problem on the growth of trigonometric sums.
Original language | English |
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Pages (from-to) | 199-216 |
Number of pages | 18 |
Journal | Acta Mathematica Hungarica |
Volume | 151 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1 Feb 2017 |
Keywords
- discrepancy
- lacunary sequence
- law of the iterated logarithm
ASJC Scopus subject areas
- General Mathematics