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:20210314T070000 END:DAYLIGHT BEGIN:STANDARD TZNAME:EST TZOFFSETFROM:-0400 TZOFFSETTO:-0500 DTSTART:20211107T060000 END:STANDARD END:VTIMEZONE BEGIN:VEVENT UID:6827a4eb52f2c DTSTART;TZID=America/Toronto:20220207T113000 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20220207T113000 URL:/combinatorics-and-optimization/events/algebraic-gr aph-theory-seminar-gabriel-coutinho-2 SUMMARY:Algebraic Graph Theory Seminar - Gabriel Coutinho CLASS:PUBLIC DESCRIPTION:Summary \n\nTITLE: Optimizing sums of eigenvalues\n\nSpeaker:\ n Gabriel Coutinho\n\nAffiliation:\n Universidade Federal de Minas Gerais\ n\nZoom:\n Contact Sabrina Lato\n\nABSTRACT:\n\nIn its original proof\, Ho ffman's well known lower bound to the\nchromatic number is obtained after replacing several terms of a sum of\neigenvalues by the smallest eigenvalu e of the graph.\n DTSTAMP:20250516T204947Z END:VEVENT END:VCALENDAR