BEGIN:VCALENDAR VERSION:2.0 PRODID:-//132.216.98.100//NONSGML kigkonsult.se iCalcreator 2.20.4// BEGIN:VEVENT UID:20250918T074932EDT-3685lLmTpj@132.216.98.100 DTSTAMP:20250918T114932Z DESCRIPTION:Title: The (virtual) cactus group.\n\nAbstract: \n\nI will intr oduce the cactus group\, a relative of the braid group. Like its more famo us cousin\, it appears naturally in representation theory and is the funda mental group of a very natural space. I will describe this space\, called the moduli space of genus 0 real curves. Then I will discuss a variant of the cactus group\, which we call the virtual cactus group. Along the way\, we will see the solution to the following question: what is the space of solutions to the equation\n\na+b=c\, where a\,b\,c are elements of RP1?\n DTSTART:20230905T161500Z DTEND:20230905T161500Z LOCATION:Room 920\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue Sherbrooke Ouest SUMMARY:Joel Kamnitzer (9IÖÆ×÷³§Ãâ·Ñ) URL:/mathstat/channels/event/joel-kamnitzer-mcgill-uni versity-350469 END:VEVENT END:VCALENDAR