BEGIN:VCALENDAR VERSION:2.0 PRODID:-//TYPO3/NONSGML News system (news)//EN BEGIN:VEVENT UID: news-92532@www.math.uoa.gr DTSTAMP:20260513T055439Z DTSTART:20260514T130000 SUMMARY:ΓΕΝΙΚΟ ΣΕΜΙΝΑΡΙΟ - On simplicity of the Cremona groups END:VEVENT END:VCALENDAR