Continued analysis reveals higher-order asymptotic fingerprints in analytic power series, suggesting a deeper structure in renormalized tails.
We continue the renormalized-tail program initiated in {AbuGhuwaleh2026}. For an analytic power series\[ f(z)=∑n≥ 0 a_n z^n, a_n≠ 0,\]the normalized Taylor tails\[T_n^f(w):=∑k≥ 0{aₙ₊ₖ}{a_n}w^k\]form the renormalization orbit studied in {AbuGhuwaleh2026}. That paper established the universal geometric limit profile and the first two asymptotic fingerprints of the orbit. Here we prove the full higher-order hierarchy. Assuming\[{aₙ₊₁}{a_n}=ρ(1+β_1/n+β_2/n^2+⋯+β_m/n^m+(n-m-η)), ρ∈^×,\ η>0,\]we show that for every fixed s∈(0,1),\[T_n^f(w)=1/1-ρ w+∑ⱼ₌₁^m P_j(ρ w;β_1,,β_j)/n^j+o(n⁻ᵐ)\]uniformly on \|ρ w|≤ s\. Each Pⱼ is a universal rational function depending only on (β₁,,βⱼ), and we give a constructive recursive algorithm for all of them via logarithmic cumulants, Faulhaber sums, and Newton interpolation. The hierarchy is triangular: the coefficient βⱼ is recovered directly from the linear term of Pⱼ. In particular, the first two fingerprints from {AbuGhuwaleh2026} are recovered as the cases $m=1,2$, while the higher-order terms are new. We also compute the third and fourth fingerprints explicitly and derive the resulting hierarchy for algebraic singularities.
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Mohammad Abu-Ghuwaleh (2026) studied this question.
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