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UID:20250810T035334EDT-3594CeOzkR@132.216.98.100
DTSTAMP:20250810T075334Z
DESCRIPTION:Title: The failure of cost in the measure-class preserving sett
 ing.\n\nAbstract: In measured group theory (MGT)\, one studies group by th
 eir actions on finite or sigma-finite measure spaces. The notion of Measur
 e Equivalence (ME)\, due to Gromov\, is very similar to quasi-isometry and
  holds many powerful invariants. We will survey treeability in the ME cont
 ext\, look at the main obstruction to a strengthening of ME\, namely orbit
  equivalence (OE). We will sketch why free groups of different rank are ME
 \, but not OE. We will then look at these notions in the measure-class pre
 serving context and see how cost is not useful here.\n\n \n
DTSTART:20240117T200000Z
DTEND:20240117T210000Z
LOCATION:Room 920\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue 
 Sherbrooke Ouest
SUMMARY:Antoine Poulin (9IÖÆ×÷³§Ãâ·Ñ)
URL:/mathstat/channels/event/antoine-poulin-mcgill-uni
 versity-354236
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