English

Convolutive sequences, II: Parametrizations

Combinatorics 2026-08-02 v1 Number Theory

Abstract

In recent work, the authors defined a sequence (an)n0(a_n)_{n\ge 0} to be mm-convolutive exactly if \begin{align*} \sum_{n\ge 0} a_{mn} q^n = \left(\sum_{n\ge 0} a_n q^n\right)^m \end{align*} for a specific positive integer mm and provided proofs of the 22- and 33-convolutivity of a small number of sequences arising from primitive eta-products. Since the completion of that work, the authors have discovered many new instances of convolutive eta-products. The main focus of this work is to unify all but one of these instances in a parametric way.

Cite

@article{arxiv.2608.01136,
  title  = {Convolutive sequences, II: Parametrizations},
  author = {Shane Chern and Dennis Eichhorn and Shishuo Fu and James A. Sellers},
  journal= {arXiv preprint arXiv:2608.01136},
  year   = {2026}
}

Comments

17 pages, 2 tables