Reserved density conjecture for multiple harmonic sums

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Let s⃗∈Nl{\vec{s}}\in{\mathbb N}^l. Define density⁡(RJ(s⃗);X)\operatorname{density}(RJ({\vec{s}});X) to be the proportion, among primes pp with ∣s⃗∣+2<p<X|{\vec{s}}|+2<p<X, for which J(s⃗∣p)=RJ(s⃗)J({\vec{s}}|p)=RJ({\vec{s}}), and let density⁡(RJ(s⃗);∞)\operatorname{density}(RJ({\vec{s}});\infty) denote its limiting value.

Reserved density conjecture.

density⁡(RJ(s⃗);∞)={1/e,if l=1, s⃗≥2,1/e,if l=s⃗=1 or l≥2.\operatorname{density}(RJ({\vec{s}});\infty)= \begin{cases} 1/\sqrt{e}, & \text{if } l=1,\ {\vec{s}}\geq 2,\\ 1/e, & \text{if } l={\vec{s}}=1 \text{ or } l\geq 2. \end{cases}

The source attributes this conjecture to Conjecture 7.6 of the author's earlier paper. No proof or resolution is given in the supplied text.

References

Primary source

Jianqiang Zhao, “Examples of finite p-divisible sets of MHS”, arXiv:0806.4947 (2008).

Additional references

2 papers in this index state this conjecture (2003–2008). The statement above is taken from the most recent of them; the others are arXiv:math/0303043.

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