BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Institute of Mathematics and Informatics - ECPv6.0.8//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Institute of Mathematics and Informatics
X-ORIGINAL-URL:https://math.bas.bg
X-WR-CALDESC:Събития за Institute of Mathematics and Informatics
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Europe/Sofia
BEGIN:DAYLIGHT
TZOFFSETFROM:+0200
TZOFFSETTO:+0300
TZNAME:EEST
DTSTART:20250330T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0300
TZOFFSETTO:+0200
TZNAME:EET
DTSTART:20251026T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20251104T130000
DTEND;TZID=Europe/Sofia:20251104T143000
DTSTAMP:20260618T220854
CREATED:20251031T130526Z
LAST-MODIFIED:20251031T131026Z
UID:18421-1762261200-1762266600@math.bas.bg
SUMMARY:Семинар на МЦМН
DESCRIPTION:Семинар на МЦМН \nВторник\, 4.11.2025\, 13:00 ч.\, Зала 403\, ИМИ – БАН \nЛектор: Leonardo Cavenaghi (МЦМН\, ИМИ – БАН) \nТема на доклада: Exotic phenomena in topology and geometry \n  \nРезюме: This talk\, aimed at a general audience of mathematicians\, discusses very geometric models of exotic spheres. \nExotic spheres are manifolds homeomorphic to classical spheres but not diffeomorphic to them. We will outline some constructions via group actions and discuss their admissible geometries. For instance\, until this day\, it is not known whether an exotic sphere admits a metric of positive sectional curvature\, but some do not even admit positive scalar curvature. \nIn this talk\, we also outline how one can indirectly study their geometries\, aiming to gain a better understanding of their admissible geometries\, for example\, regarding the existence of Lorentzian metrics and the spectral problem. \n 
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bd%d0%b0-%d0%bc%d1%86%d0%bc%d0%bd-38/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
END:VEVENT
END:VCALENDAR