BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//132.216.98.100//NONSGML kigkonsult.se iCalcreator 2.20.4//
BEGIN:VEVENT
UID:20250809T163816EDT-9767RcoEfX@132.216.98.100
DTSTAMP:20250809T203816Z
DESCRIPTION:Title: Limiting absorption principle and virtual levels of oper
 ators in Banach spaces\n\nAbstract: Virtual levels\, also known as thresho
 ld resonances\, admit several equivalent characterizations:\n\n1. there ar
 e corresponding 'virtual states' from a space 'slightly weaker' than L^2\;
 \n\n2. there is no limiting absorption principle in their vicinity (e.g. n
 o weights such that the 'sandwiched' resolvent is uniformly bounded)\;\n\n
 3. an arbitrarily small perturbation can produce an eigenvalue.\n\nWe deve
 lop a general approach to virtual levels in Banach spaces and provide appl
 ications to Schroedinger operators with nonselfadjoint potentials and in a
 ny dimension\, deriving optimal estimates on the resolvent (including the 
 lower dimensional cases).\n\n \n\nThis is a joint work with Nabile Boussai
 d (Université Franche-Comte Besançon).\n\n \n\nZoom link: https://umontrea
 l.zoom.us/j/83118539851?pwd=bk5IOXBLNDRNSnR4dEcrSUFJVWhPZz09\n\nMeeting ID
 : 831 1853 9851\n\nPasscode: 215516\n
DTSTART:20230317T173000Z
DTEND:20230317T183000Z
SUMMARY:Andrew Comech (Texas A&M University)
URL:/mathstat/channels/event/andrew-comech-texas-am-un
 iversity-346852
END:VEVENT
END:VCALENDAR