BEGIN:VCALENDAR VERSION:2.0 PRODID:-//TYPO3/NONSGML News system (news)//EN BEGIN:VEVENT UID: news-44611@see.pspa.uoa.gr DTSTAMP:20230530T130745Z DTSTART:20230601T130000 SUMMARY:Γενικό Σεμινάριο - Discrete group actions on 3-manifolds and embeddable Cayley complexes END:VEVENT END:VCALENDAR