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:20230312T070000
END:DAYLIGHT
BEGIN:STANDARD
TZNAME:EST
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
DTSTART:20221106T060000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
UID:69e3b029b37fe
DTSTART;TZID=America/Toronto:20230330T130000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20230330T130000
URL:https://uwaterloo.ca/combinatorics-and-optimization/events/algebraic-co
 mbinatorics-seminar-freddy-cachazo
SUMMARY:Algebraic Combinatorics Seminar - Freddy Cachazo
CLASS:PUBLIC
DESCRIPTION:TITLE: Arrangements of Pseudolines\, Tropical Grassmannians\, a
 nd\nGeneralized Scattering Amplitudes\n\nSpeaker:\n Freddy Cachazo\n\nAffi
 liation:\n Perimeter Institute\n\nRoom:\n MC 6029\n\nABSTRACT: For each ar
 rangement of (pseudo)lines on the projective\nplane\, it is possible to co
 nstruct a differential form that captures\nits combinatorial structure. Th
 e forms have simple poles whenever\ntriangles shrink to a point in the arr
 angement\, and share the same\nresidue when two arrangements are connected
  via a \"triangle flip\".
DTSTAMP:20260418T162409Z
END:VEVENT
END:VCALENDAR