Finite Interpretation of the Hyper-Catalan Series Zero and its Powers

Fuente: arXiv
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Main Authors: Rubine, Dean, Mukewar, Pratham
Format: Preprint
Published: 2025
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author Rubine, Dean
Mukewar, Pratham
author_facet Rubine, Dean
Mukewar, Pratham
contents In 2025, Wildberger and Rubine showed the formal series zero of the univariate geometric polynomial is $\mathbf{S}$, the generating series for the hyper-Catalan numbers $\mathbf{C}_m$, which count the number of roofed subdivided polygons (subdigons) of type $\mathbf{m}$. We show that we can interpret this result as a finite identity at each level, where a level is a truncation of $\Sb$ to a given maximum number of vertices, edges, or faces (bounded by degree) of the associated subdigon types. We then explore powers $\mathbf{S}^r$, recounting Raney's and our own combinatorial derivations of its coefficients.
format Preprint
id arxiv_https___arxiv_org_abs_2508_06739
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Finite Interpretation of the Hyper-Catalan Series Zero and its Powers
Rubine, Dean
Mukewar, Pratham
Combinatorics
In 2025, Wildberger and Rubine showed the formal series zero of the univariate geometric polynomial is $\mathbf{S}$, the generating series for the hyper-Catalan numbers $\mathbf{C}_m$, which count the number of roofed subdivided polygons (subdigons) of type $\mathbf{m}$. We show that we can interpret this result as a finite identity at each level, where a level is a truncation of $\Sb$ to a given maximum number of vertices, edges, or faces (bounded by degree) of the associated subdigon types. We then explore powers $\mathbf{S}^r$, recounting Raney's and our own combinatorial derivations of its coefficients.
title Finite Interpretation of the Hyper-Catalan Series Zero and its Powers
topic Combinatorics
url https://arxiv.org/abs/2508.06739