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arXiv · 2210.00668

Multiple Scale Asymptotics of Map Enumeration

Nicholas Ercolani·Joceline Lega·Brandon Tippings
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Abstract

We introduce a systematic approach to express generating functions for the enumeration of maps on surfaces of high genus in terms of a single generating function relevant to planar surfaces. Central to this work is the comparison of two asymptotic expansions obtained from two different fields of mathematics: the Riemann-Hilbert analysis of orthogonal polynomials and the theory of discrete dynamical systems. By equating the coefficients of these expansions in a common region of uniform validity in their parameters, we recover known results and provide new expressions for generating functions associated with graphical enumeration on surfaces of genera 0 through 7. Although the body of the article focuses on 4-valent maps, the methodology presented here extends to regular maps of arbitrary even valence and to some cases of odd valence, as detailed in the appendices.

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Nicholas Ercolani, Joceline Lega, Brandon Tippings. 2022-10-03. Multiple Scale Asymptotics of Map Enumeration. https://doi.org/10.1088/1361-6544/acb47d

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