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:6830d9a55b372
DTSTART;TZID=America/Toronto:20220919T113000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20220919T113000
URL:/combinatorics-and-optimization/events/algebraic-gr
 aph-theory-seminar-qianqian-yang-0
SUMMARY:Algebraic Graph Theory Seminar - Qianqian Yang
CLASS:PUBLIC
DESCRIPTION:Summary \n\nTITLE: Essential Covers of the Cube by Hyperplanes
 \n\nSpeaker:\n Igor Araujo\n\nAffiliation:\n University of Illinois Urbana
 -Champaign\n\nLocation:\n contact Sabrina Lato for Zoom link\n\nABSTRACT:
   An essential cover of the vertices of the n-cube\n$\\{0\,1\\}^n$ by hyp
 erplanes is a minimal covering where no hyperplane\nis redundant\, and eve
 ry variable appears in the equation of at least\none hyperplane. Linial an
 d Radhakrishnan gave a construction of an\nessential cover with $\\lceil \
 \frac{n}{2} \\rceil + 1$ hyperplanes and\nshowed that $\\Omega(\\sqrt{n})$
  hyperplanes are required.\n 
DTSTAMP:20250523T202509Z
END:VEVENT
END:VCALENDAR