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:20220313T070000 END:DAYLIGHT BEGIN:STANDARD TZNAME:EST TZOFFSETFROM:-0400 TZOFFSETTO:-0500 DTSTART:20211107T060000 END:STANDARD END:VTIMEZONE BEGIN:VEVENT UID:6827bbb8a80b6 DTSTART;TZID=America/Toronto:20220524T150000 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20220524T150000 URL:/combinatorics-and-optimization/events/graphs-and-m atroids-seminar-peter-nelson-4 SUMMARY:Graphs and Matroids Seminar - Peter Nelson CLASS:PUBLIC DESCRIPTION:Summary \n\nTITLE: On Donuts and Quasigraphic matroids\n\nSpea ker:\n Peter Nelson\n\nAffiliation:\n University of À¶Ý®ÊÓÆµ\n\nRoom:\n MC 5417\n\nABSTRACT:\n\nQuasigraphic matroids are graph-like objects that gi ve a common\ngeneralization of lift and frame matroids. Donuts are edible\ ntopological surfaces. I will talk about a surprising link between\nthese two types of object\, assuming no prior knowledge of quasigraphic\nmatroid s or donuts.\n DTSTAMP:20250516T222704Z END:VEVENT END:VCALENDAR