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:20250309T070000
END:DAYLIGHT
BEGIN:STANDARD
TZNAME:EST
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
DTSTART:20251102T060000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
UID:69ce8c9f9a6ad
DTSTART;TZID=America/Toronto:20251106T143000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20251106T153000
URL:https://uwaterloo.ca/combinatorics-and-optimization/events/algebraic-an
 d-enumerative-combinatorics-seminar-leigh-foster-0
SUMMARY:Algebraic and enumerative combinatorics seminar-Leigh Foster
CLASS:PUBLIC
DESCRIPTION:TITLE: Tilings of Benzels (and other finite regions) in the hex
 agon\ngrid\n\nSpeaker\n Leigh Foster\n\nAffiliation\n University of Wtaerl
 oo\n\nLocation\n MC 6029\n\nABSTRACT: In 1990\, Conway and Lagarias intro
 duced tilability criteria\nfor tilability for finite regions of the hexag
 on and square grids. In\nthe same year\, Thurston expanded upon their wor
 k\, introducing the\nheight function criterion. We will discuss some new
  results in\ntilability: A new tilability criteria via the SL_2(C) double
  dimer\nmodel\, and enumeration of tilings of special regions called Ben
 zels\,\nintroduced in 2020 by Propp\, using a technique called compressio
 n. If\ntime allows\, we will also discuss ongoing work that expands\nThur
 ston's height function to stone-and-bone tilings of the hexagon\ngrid.\n\
 nTHERE WILL BE A PRE-SEMINAR PRESENTING RELEVANT BACKGROUND AT THE\nBEGINN
 ING GRADUATE LEVEL STARTING AT 1:30PM.
DTSTAMP:20260402T153455Z
END:VEVENT
END:VCALENDAR