English

On the Symmetry Integral

Number Theory 2010-07-08 v1

Abstract

We give a level one result for the "symmetry integral", say If(N,h)I_f(N,h), of essentially bounded f:NRf:\N \to \R; i.e., we get a kind of "square-root cancellation" \thinspace bound for the mean-square (in N<x2NN<x\le 2N) of the "symmetry" \thinspace of, say, the arithmetic function f:=g\1f:=g\ast \1, where g:NRg:\N \to \R is such that ϵ>0\forall \epsilon>0 we have g(n)ϵnϵg(n)\ll_{\epsilon} n^{\epsilon}, and supported in [1,Q][1,Q], with QNQ\ll N (so, the exponent of QQ relative to NN, say the level λ:=(logQ)/(logN)\lambda:=(\log Q)/(\log N) is λ<1\lambda < 1), where the symmetry sum weights the ff-values in (almost all, i.e. all but o(N)o(N) possible exceptions) the short intervals [xh,x+h][x-h,x+h] (with positive/negative sign at the right/left of xx), with mild restrictions on hh (say, hh\to \infty and h=o(N)h=o(\sqrt N), as NN\to \infty).

Keywords

Cite

@article{arxiv.1007.1018,
  title  = {On the Symmetry Integral},
  author = {Giovanni Coppola},
  journal= {arXiv preprint arXiv:1007.1018},
  year   = {2010}
}

Comments

Plain TeX(5 pages)

R2 v1 2026-06-21T15:45:14.278Z