BEGIN:VCALENDAR VERSION:2.0 PRODID:-//hacksw/handcal//NONSGML v1.0//EN CALSCALE:GREGORIAN BEGIN:VEVENT LOCATION:Moscow\, 3\, Ordzhonikidze st.\, аud. 568 DESCRIPTION:Abstract: We formulate and prove some basic properties of the spectrum and the resolvent set. We consider natural examples of operators whose spectrum coincides with the entire complex plane or is empty. DTSTART:20191203T063700Z DTEND:20191203T183700Z SUMMARY:Postgraduate mathematical seminar URL;VALUE=URI:/media/events/postgraduate-mathematical--seminar/ DTSTAMP:20260825T135436Z UID:6a8d746cc4887 END:VEVENT END:VCALENDAR