# On classes of planar maps with $\alpha$-orientations having geometric interpretations

Presented by:
G Schaeffer École Polytechnique
Date:
Wednesday 22nd April 2015 - 10:00 to 11:00
Venue:
INI Seminar Room 1
Abstract:
Fixed out-degree orientations or $\alpha$-orientations play a central rôle in the so-called master bijections relating various families of planar maps to simple varieties of trees. I will discuss several known cases in which these orientations also provide purely combinatorial ways to compute geometric representations.