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SUMMARY:Amenability versus non-exactness of dense subgroups of a compact g
 roup
DTSTART:20180509T150000
DTEND:20180509T160000
DTSTAMP:20260916T010536Z
UID:7993c77a8a589d8d4d39d405e6dc77fbbdc98a183a2457786ae96bdd
CATEGORIES:Conferences - Seminars
DESCRIPTION:Masato Mimura (EPFL and Tohoku University)\nWe provide an exam
 ple of a compact group K\, a 5-generated dense subgroup Lambda_1 in K and 
 an element u in K such that  \n\n- Lambda_1 is amenable\, but\n- the grou
 p Lambda_2\, generated by Lambda_1 and u\, is non-exact\, in other words\,
  it fails to have property A of Guoliang Yu.\n\nOur construction is built 
 upon a construction of non-exact groups that are LEF by Osajda and Arzhant
 seva—Osajda.
LOCATION:MA A3 31 https://plan.epfl.ch/?room=MAA331
STATUS:CONFIRMED
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