Events by date

Title: Counting planar maps, 50 years after William Tutte

Speaker: Mireille Bousquet-Mélou Affiliation: CNRS, Université de Bordeaux Location: MC 5501 or please contact Emma Watson for Zoom link

Abstract:

Every planar map can be properly coloured with four colours. But how many proper colourings has, on average, a planar map with $n$ edges? What if we allow a prescribed number of "monochromatic" edges, the endpoints of which share the same colour? What if we have $q$ colours rather than four?