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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.
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University of Cambridge Research Councils UK
    Clay Mathematics Institute London Mathematical Society NM Rothschild and Sons