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2010 Scaling Limits for Random Quadrangulations of Positive Genus
Jérémie Bettinelli
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Electron. J. Probab. 15: 1594-1644 (2010). DOI: 10.1214/EJP.v15-810


Abstract. We discuss scaling limits of large bipartite quadrangulations of positive genus. For a given $g$, we consider, for every positive integer $n$, a random quadrangulation $q_n$ uniformly distributed over the set of all rooted bipartite quadrangulations of genus $g$ with $n$ faces. We view it as a metric space by endowing its set of vertices with the graph distance. We show that, as $n$ tends to infinity, this metric space, with distances rescaled by the factor $n$ to the power of $-1/4$, converges in distribution, at least along some subsequence, toward a limiting random metric space. This convergence holds in the sense of the Gromov-Hausdorff topology on compact metric spaces. We show that, regardless of the choice of the subsequence, the Hausdorff dimension of the limiting space is almost surely equal to $4$. Our main tool is a bijection introduced by Chapuy, Marcus, and Schaeffer between the quadrangulations we consider and objects they call well-labeled $g$-trees. An important part of our study consists in determining the scaling limits of the latter.


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Jérémie Bettinelli. "Scaling Limits for Random Quadrangulations of Positive Genus." Electron. J. Probab. 15 1594 - 1644, 2010.


Accepted: 20 October 2010; Published: 2010
First available in Project Euclid: 1 June 2016

zbMATH: 1226.60047
MathSciNet: MR2735376
Digital Object Identifier: 10.1214/EJP.v15-810

Primary: 60F17


Vol.15 • 2010
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