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:69f579ed54f0d
DTSTART;TZID=America/Toronto:20251105T143000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20251105T153000
URL:https://uwaterloo.ca/pure-mathematics/events/pure-math-colloquium-58
SUMMARY:Pure Math Colloquium
CLASS:PUBLIC
DESCRIPTION:JOEL KAMNITZER\, MCGILL UNIVERSITY\n\n_The top-heavy conjecture
  and the topology of (real) matroid Schubert\nvarieties_\n\nSuppose we are
  giving a spanning set S in a vector space V and we\nconsider all subspace
 s of V spanned by subsets of S. The top-heavy\nconjecture states that the 
 number of dimension k subspaces is less\nthan or equal to the number for c
 odimension k subspaces. This\nelementary statement was first conjectured b
 y Dowling and Wilson in\n1975 and resisted any proof for 40 years. Finally
  though\, it was\nresolved by Huh and Wang in 2017\, and partially led to 
 Huh's 2022\nFields Medal. I will outline the details of the proof\, which 
 relies on\nthe study of the topology of a beautiful space called a matroid
 \nSchubert variety. Finally\, I will discuss our own contribution to this\
 nsubject\, which is the study of the topology of the real locus of this\ns
 pace (which unfortunately does not lead to the proof of any famous\nconjec
 ture).\n\nMC 5501
DTSTAMP:20260502T041333Z
END:VEVENT
END:VCALENDAR