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UID:20250807T155210EDT-0560FcGuhz@132.216.98.100
DTSTAMP:20250807T195210Z
DESCRIPTION:Title: The structure of hyperfinite subequivalence relations of
  treed equivalence relations.\n\nAbstract: A large part of measured group 
 theory studies structural properties of countable groups that hold 'on ave
 rage'. This is made precise by studying the orbit equivalence relations in
 duced by free measurable actions of these groups on a standard probability
  space. In this vein\, the amenable groups correspond to hyperfinite equiv
 alence relations\, and the free groups to the treeable ones. In joint work
  with R. Tucker-Drob\, we give a detailed analysis of the structure of hyp
 erfinite subequivalence relations of a treed equivalence relation on a sta
 ndard probability space\, deriving the analogues of structural properties 
 of amenable subgroups (copies of Z) of a free group. Most importantly\, ju
 st like every such subgroup is contained in a unique maximal one\, we show
  that even in the non-measure-preserving setting\, every hyperfinite subeq
 uivalence relation is contained in a unique maximal one.\n\n \n\nThis info
 rmation can also be found on the seminar website. We hope to see you all t
 here.\n\nLink: https://mcgill.zoom.us/j/98910726246?pwd=VHlzTzdTZGtqcHVuWG
 NKdys4d0FzQT09\n\nZoom ID: 989 1072 6246\n	Password: delta\n
DTSTART:20210120T200000Z
DTEND:20210120T210000Z
SUMMARY:Anush Tserunyan (9IÖÆ×÷³§Ãâ·Ñ)
URL:/mathstat/channels/event/anush-tserunyan-mcgill-un
 iversity-327769
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