Arnold's average-density conjecture for numerical semigroups

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Let dm=(d1,…,dm){\bf d}^m=(d_1,\ldots,d_m) be a vector of generators, and let S(dm){\sf S}({\bf d}^m) be the associated numerical semigroup with conductor C(dm){\sf C}({\bf d}^m). Let G~(dm)\widetilde{G}({\bf d}^m) denote the number of elements of the semigroup in the segment from 00 to C(dm)−1{\sf C}({\bf d}^m)-1, and define

p(dm)=G~(dm)C(dm).p({\bf d}^m)=\frac{\widetilde{G}({\bf d}^m)}{{\sf C}({\bf d}^m)}.

Arnold's average-density conjecture. For large dm{\bf d}^m, with overwhelming probability, this fraction is asymptotically 1/m1/m; equivalently,

G~(dm)≡asymptotically weak1mC(dm).\widetilde{G}({\bf d}^m)\stackrel{\mathrm{asymptotically\ weak}}{\equiv}\frac{1}{m}{\sf C}({\bf d}^m).

This is Arnold's Conjecture #1999–9 concerning the average distribution of a numerical semigroup below its conductor. The supplied text gives no resolution, so the conjecture remains open.

References

Primary source

Leonid G. Fel, “Arnold's Conjectures on Weak Asymptotics and Statistics of Numerical Semigroups S(d_1,d_2,d_3)”, arXiv:math/0512637 (2005).

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