Conjectural asymptotics for numerical-semigroup sequences

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Let sgs_g, n^g\hat n_g, and r1.51\mathsf{r}_{1.51} be the sequences and constant defined in the source, where gg tends to infinity. Conjectural asymptotics. The paper gives three successively stronger conjectures:

lim⁡g→∞n^g1/g=lim⁡g→∞sg1/g=r1.51.\lim_{g \to \infty} \hat n_g^{1/g}=\lim_{g\to\infty}s_g^{1/g}=\mathsf{r}_{1.51}.
lim⁡g→∞n^gn^g−1=lim⁡g→∞sgsg−1=r1.51.\lim_{g \to \infty}\frac{\hat n_g}{\hat n_{g-1}}=\lim_{g\to\infty}\frac{s_g}{s_{g-1}}=\mathsf{r}_{1.51}.
  1. There exist constants α\alpha and α′\alpha' (possibly equal) such that
n^g=gα+o(1)r1.51gandsg=gα′+o(1)r1.51g.\hat n_g=g^{\alpha+o(1)}\mathsf{r}_{1.51}^g\qquad\text{and}\qquad s_g=g^{\alpha'+o(1)}\mathsf{r}_{1.51}^g.

These claims concern the conjectural growth of the auxiliary sequences sgs_g and n^g\hat n_g; the source motivates them by numerical extrapolation and states that each successive claim implies the next.

References

Primary source

Daniel G. Zhu, “Sub-Fibonacci behavior in numerical semigroup enumeration”, arXiv:2202.05755 (2023).

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