# Baptiste Louf

## Contact

Institut de Mathématiques de Bordeaux

Bureau 313, bâtiment A33

351, cours de la Libération

33405 TALENCE

baptiste.louf(at)math.u-bordeaux.fr

I am a "Chargé de Recherche" CNRS at Institut de Mathématiques de Bordeaux.

Previously, I was a postdoc in Montréal (CRM, McGill and UQAM) and in the Probability and Combinatorics group of Uppsala University. I did my PhD at IRIF in the Combinatorics team where my advisor was Guillaume Chapuy. Here is my PhD manuscript, and the slides of the defense.

** New: 2-year postdoc position in Bordeaux, starting Fall 2025. ** Deadline : 31/12/2024, more details here.

## Research interests

Geometry of surfaces and enumeration (in a broad sense). I mainly study *combinatorial maps* (i.e. graphs embedded on surfaces), but I also work with other models of surfaces and combinatorial families. These days, I am particularly interested in *large genus behaviour, bivariate asymptotics and the link with integrable hierachies.*
## Articles and preprints

*Modularity and graph expansion*, with Fiona Skerman and Colin McDiarmid, in *ITCS 2024*. arXiv
*Distances and isoperimetric inequalities in random triangulations of high genus*, with Thomas Budzinski and Guillaume Chapuy. arXiv
*Random partitions under the Plancherel-Hurwitz measure, high genus Hurwitz numbers and maps*, with Guillaume Chapuy and Harriet Walsh. AofA 2022 (short version), full version in *Annals of Probability*. arXiv
*Unicellular maps vs hyperbolic surfaces in large genus: simple closed curves*, with Svante Janson, in *Annals of Probability*. arXiv
*Random generation and scaling limits of fixed genus factorizations into transpositions*, with Valentin Féray and Paul Thévenin, in *Probability Theory and Related Fields*. arXiv
*Short cycles in high genus unicellular maps*, with Svante Janson, in *Annales de l'Institut Henri Poincaré*. arXiv
*Large expanders in high genus unicellular maps*, in *Combinatorial Theory*. arXiv
*Finding large expanders in graphs: from topological minors to induced subgraphs*, with Fiona Skerman, in *Electronic Journal of Combinatorics*. arXiv
*Planarity and non-separating cycles in uniform high genus quadrangulations*, in *Probability Theory and Related Fields*. arXiv
*Local limits of bipartite maps with prescribed face degrees in high genus*, with Thomas Budzinski, in *Annals of Probability*. arXiv
*Local limits of uniform triangulations in high genus*, with Thomas Budzinski, in *Inventiones Mathematicae*. arXiv
*Simple formulas for constellations and bipartite maps with prescribed degrees*, FPSAC 2019 (short version), full version in *Canadian Journal of Mathematics*. arXiv
*A new family of bijections for planar maps*, FPSAC 2018 (short version), full version in *Journal of Combinatorial Theory, Series A*. arXiv