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VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:Coloring the Voronoi tessellation of lattices
DTSTART:20180125T131500
DTEND:20180125T141500
DTSTAMP:20260916T034722Z
UID:4a5131c2d9320e09ba90806c50a4efa6c562099c3eb50926750aac4f
CATEGORIES:Conferences - Seminars
DESCRIPTION:Frank Vallentin (Universität zu Köln)\nIn this talk I will i
 ntroduce the chromatic number of a lattice: It is the least number of colo
 rs one needs to color the interiors of the cells of the Voronoi tessellati
 on of a lattice so that no two cells sharing a facet are of the same color
 . I will introduce two lower bounds for the chromatic number: the sphere p
 acking lower bound and the spectral lower bound. Using them I will show ho
 w to compute\, sometimes using polynomial optimization\, the chromatic num
 ber of several important lattices.\n\n(based on joint work with David Mado
 re and Mathieu Dutour Sikiric)\n 
LOCATION:MA A1 10 https://plan.epfl.ch/?room=MAA110
STATUS:CONFIRMED
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