English

A random pointwise ergodic theorem with Hardy field weights

Dynamical Systems 2019-06-27 v2 Classical Analysis and ODEs

Abstract

Let ana_n be the random increasing sequence of natural numbers which takes each value independently with probability nan^{-a}, 0<a<1/20 < a < 1/2, and let p(n)=n1+ϵp(n) = n^{1+\epsilon}, 0<ϵ<10 < \epsilon < 1. We prove that, almost surely, for every measure-preserving system (X,T)(X,T) and every fL1(X)f \in L^1(X) the modulated, random averages 1Nn=1Ne(p(n))Tan(ω)f \frac{1}{N} \sum_{n = 1}^N e(p(n)) T^{a_n(\omega)} f converge to 00 pointwise almost everywhere.

Keywords

Cite

@article{arxiv.1410.0806,
  title  = {A random pointwise ergodic theorem with Hardy field weights},
  author = {Ben Krause and Pavel Zorin-Kranich},
  journal= {arXiv preprint arXiv:1410.0806},
  year   = {2019}
}

Comments

v2: corrected the chain of approximations, see (2.8) in v2; small corrections following referee report

R2 v1 2026-06-22T06:12:22.867Z