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arXiv · 2511.03680

Blossoming bijection for bipartite maps: a new approach via orientations and applications to the Ising model

Marie Albenque·Laurent Ménard·Nicolas Tokka
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Abstract

We develop a new bijective framework for the enumeration of bipartite planar maps with control on the degree distribution of black and white vertices. Our approach builds on the blossoming-tree paradigm, introducing a family of orientations on bipartite maps that extends Eulerian and quasi-Eulerian orientations and connects the bijection of Bousquet-M\'elou and Schaeffer to the general scheme of Albenque and Poulalhon. This enables us to generalize the Bousquet-M\'elou and Schaeffer's bijection to several families of bipartite maps. As an application, we also derive a rational and Lagrangian parametrization with positive integer coefficients for the generating series of quartic maps equipped with an Ising model, which is key to the probabilistic study of these maps.

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Marie Albenque, Laurent Ménard, Nicolas Tokka. 2025-11-05. Blossoming bijection for bipartite maps: a new approach via orientations and applications to the Ising model. https://arxiv.org/abs/2511.03680

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