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  1. Home > Articles & Issues >
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  3. A bijection for root ...
Conference paper

A bijection for rooted maps on general surfaces (extended abstract)

Guillaume Chapuy (1), Maciej Dołęga (2)
(1) Laboratoire d'informatique Algorithmique : Fondements et Applications
(2) Instytut Matematyczny
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Imported on
November 21, 2016
Published on
December 31, 2014
Last modified on
March 31, 2025
Volume
DMTCS Proceedings, 27th International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2015)
Proceedings
DOI
10.46298/dmtcs.2536
License
Attribution 4.0 International (CC BY 4.0)
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A bijection for rooted maps on general surfaces (extended abstract)

Guillaume Chapuy (1), Maciej Dołęga (2)
(1) Laboratoire d'informatique Algorithmique : Fondements et Applications
(2) Instytut Matematyczny
Abstract
English
We extend the Marcus-Schaeffer bijection between orientable rooted bipartite quadrangulations (equivalently: rooted maps) and orientable labeled one-face maps to the case of all surfaces, orientable or non-orientable. This general construction requires new ideas and is more delicate than the special orientable case, but carries the same information. It thus gives a uniform combinatorial interpretation of the counting exponent $\frac{5(h-1)}{2}$ for both orientable and non-orientable maps of Euler characteristic $2-2h$ and of the algebraicity of their generating functions. It also shows the universality of the renormalization factor $n$<sup>¼</sup> for the metric of maps, on all surfaces: the renormalized profile and radius in a uniform random pointed bipartite quadrangulation of size $n$ on any fixed surface converge in distribution. Finally, it also opens the way to the study of Brownian surfaces for any compact 2-dimensional manifold.
French
Nous étendons la bijection de Marcus et Schaeffer entre quadrangulations biparties orientables (de manière équivalente: cartes enracinées) et cartes à une face étiquetées orientables à toutes les surfaces, orientables ou non. Cette construction générale requiert des idées nouvelles et est plus délicate que dans le cas particulier orientable, mais permet des utilisations similaires. Elle donne donc une interprétation combinatoire uniforme de l’exposant de comptage $\frac{5(h-1)}{2}$ pour les cartes orientables et non-orientables de caractéristique d’Euler $2-2h$, et de l’algébricité des fonctions génératrices. Elle montre l’universalité du facteur de normalisation $n$<sup>¼</sup> pour la métrique des cartes, sur toutes les surfaces: le profil et le rayon d’une quadrangulation enracinée pointée sur une surface fixée converge en distribution. Enfin, elle ouvre à la voie à l’étude des surfaces Browniennes pour toute 2-variété compacte.
Keywords
  • [INFO.INFO-DM]Computer Science [cs]/Discrete Mathematics [cs.DM]
  • Graphs on surfaces
  • trees
  • random discrete surfaces
Cited by

Source: OpenCitations

  • A new family of bijections for planar maps

    arXiv (Cornell University)

    Authors : Baptiste Louf ORCID

    Journal reference : Volume 168, 2019, pp. 374-395

    DOI : 10.1016/j.jcta.2019.06.006
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