BEGIN:VCALENDAR VERSION:2.0 PRODID:-//132.216.98.100//NONSGML kigkonsult.se iCalcreator 2.20.4// BEGIN:VEVENT UID:20251021T192835EDT-33768ced0W@132.216.98.100 DTSTAMP:20251021T232835Z DESCRIPTION:Title: A vanishing result for the second L2-Betti number.\n\nAb stract: I will give a quick introduction to L2-Betti numbers and describe a result explaining why the second L2-Betti number vanishes for certain co mpact 2-complexes whose fundamental groups are special\, in the sense that they are subgroups of right-angled Artin groups.\n DTSTART:20191120T200000Z DTEND:20191120T210000Z LOCATION:Room 1104\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue Sherbrooke Ouest SUMMARY:Daniel Wise (9IÖÆ×÷³§Ãâ·Ñ) URL:/mathstat/channels/event/daniel-wise-mcgill-univer sity-302630 END:VEVENT END:VCALENDAR