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DESCRIPTION: When counting walks (with a given step-set)\, an equi-enumerat
 ion phenomenom is often observed between a stronger constraint on the domai
 n and a stronger constraint on the position of the endpoint (a classical on
 e-dimensional example is the fact that positive walks of length 2 n  are in
  bijection with walks of length 2 n  ending at 0\, both being counted by th
 e central binomial coefficient). I will show examples of such relations for
  2 d  walks where the equi-enumeration can be bijectively explained using p
 lanar maps endowed with certain orientations (Schnyder woods\, bipolar orie
 ntations). 
DTSTAMP:20200108T165800
DTSTART:20200113T141500
CLASS:PUBLIC
LOCATION:Technische Universität Berlin\n Institut für Mathematik\n Straße d
 es 17. Juni 136\n 10623 Berlin\n Room MA 041 (Ground Floor)
SEQUENCE:0
SUMMARY:Eric Fusy (École Polytechnique Paris): Bijections between families 
 of walks using oriented planar maps
UID:95693029@/www.mi.fu-berlin.de
URL:https://www.mi.fu-berlin.de/en/facetsofcomplexity/monday/20200113-L-Fus
 y.html
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