BEGIN:VCALENDAR
CALSCALE:GREGORIAN
PRODID:iCalendar-Ruby
VERSION:2.0
BEGIN:VEVENT
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.facetsofcomplexity.de
URL:http://www.facetsofcomplexity.de/monday/20200113-L-Fusy.html
END:VEVENT
END:VCALENDAR