The arithmetic correlations conjecture for convolutions of divisor sums

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Let α,β\alpha,\beta be complex shifts and let γ,δ\gamma,\delta be shifts for which the quantities below are defined. Define the arithmetic coefficients Iα,γ(n)I_{\alpha,\gamma}(n) and Iβ,δ(n)I_{\beta,\delta}(n) by

∑n=1∞Iα,γ(n)ns=ζ(s+α)ζ(s+γ),∑n=1∞Iβ,δ(n)ns=ζ(s+β)ζ(s+δ).\sum_{n=1}^\infty\frac{I_{\alpha,\gamma}(n)}{n^s}=\frac{\zeta(s+\alpha)}{\zeta(s+\gamma)},\qquad \sum_{n=1}^\infty\frac{I_{\beta,\delta}(n)}{n^s}=\frac{\zeta(s+\beta)}{\zeta(s+\delta)}.

For the Ramanujan sums rq(h)r_q(h) and the arithmetic factors Fα,γ(q)F_{\alpha,\gamma}(q) and Fβ,δ(q)F_{\beta,\delta}(q) occurring in the conjectural main term, set

m(x,h)=1ζ(1+γ−α)ζ(1+δ−β)∑q=1∞rq(h)Fα,γ(q)Fβ,δ(q)q2x1−α−β1−α−β.m(x,h)=\frac{1}{\zeta(1+\gamma-\alpha)\zeta(1+\delta-\beta)}\sum_{q=1}^\infty\frac{r_q(h)F_{\alpha,\gamma}(q)F_{\beta,\delta}(q)}{q^2}\frac{x^{1-\alpha-\beta}}{1-\alpha-\beta}.

Arithmetic correlations conjecture. There are numbers ϕ<1\phi<1 and ψ>0\psi>0 such that

∑n≤xIα,γ(n)Iβ,δ(n+h)=m(x,h)+O(xϕ)\sum_{n\le x}I_{\alpha,\gamma}(n)I_{\beta,\delta}(n+h)=m(x,h)+O(x^\phi)

uniformly for h≪xψh\ll x^\psi. This conjecture supplies the arithmetic input used in the paper's main theorem and is intended to explain the correlations underlying the ratios conjecture. The source does not state a resolution, so it remains open.

References

Primary source

Brian Conrey and Jonathan P. Keating, “Averages of ratios of the Riemann zeta-function and correlations of divisor sums”, arXiv:1611.09198 (2016).

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