BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Drupal iCal API//EN X-WR-CALNAME:Events items teaser X-WR-TIMEZONE:America/Toronto BEGIN:VTIMEZONE TZID:America/Toronto X-LIC-LOCATION:America/Toronto BEGIN:DAYLIGHT TZNAME:EDT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 DTSTART:20200308T070000 END:DAYLIGHT BEGIN:STANDARD TZNAME:EST TZOFFSETFROM:-0400 TZOFFSETTO:-0500 DTSTART:20191103T060000 END:STANDARD END:VTIMEZONE BEGIN:VEVENT UID:682e541e89b93 DTSTART;TZID=America/Toronto:20200618T130300 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20200618T130300 URL:/combinatorics-and-optimization/events/combinatoria l-optimization-reading-group-julian-romero SUMMARY:Combinatorial Optimization Reading Group - Julián Romero CLASS:PUBLIC DESCRIPTION:Summary \n\nTITLE: Graph coloring of graphs with large girth i s hard for the\nNullstellensatz\n\nSpeaker:\n Julián Romero\n\nAffiliatio n:\n University of À¶Ý®ÊÓÆµ\n\nZoom:\n Contact Sharat Ibrahimpur\n\nABSTRA CT:\n\nIn this talk we will discuss a method to solve combinatorial proble ms\nusing hierarchies of systems of linear equations using Hilbert's\nNull stellensatz. In particular\, we will study the behaviour of these\nhierarc hies for deciding the non-$k$-colorabilty of graphs.\n DTSTAMP:20250521T223054Z END:VEVENT END:VCALENDAR