BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Drupal iCal API//EN
X-WR-CALNAME:Events items teaser
X-WR-TIMEZONE:America/Toronto
BEGIN:VTIMEZONE
TZID:America/Toronto
X-LIC-LOCATION:America/Toronto
BEGIN:DAYLIGHT
TZNAME:EDT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
DTSTART:20260308T070000
END:DAYLIGHT
BEGIN:STANDARD
TZNAME:EST
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
DTSTART:20251102T060000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
UID:6ade44e0d96da
DTSTART;TZID=America/Toronto:20261008T150000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20261008T160000
URL:https://uwaterloo.ca/pure-mathematics/events/logicmodel-theory-seminar-
 daniel-max-hoffmann-amenable-tame
SUMMARY:Logic/Model Theory Seminar | Daniel Max Hoffmann | Amenable tame\nf
 lows: Theorems motivated by model-theoretic dynamics
CLASS:PUBLIC
DESCRIPTION:DANIEL MAX HOFFMANN (UNIVERSITY OF WARSAW) \n_Amenable tame flo
 ws: Theorems motivated by model-theoretic dynamics_ \n\nThere is an intere
 sting interplay between model theory and topological\ndynamics. Newelski s
 uggested using the machinery of topological\ndynamics to study definable g
 roups and the related dynamics on spaces\nof types. For example\, he propo
 sed a conjecture stating that\, under\nsuitable model-theoretic assumption
 s\, the Ellis group of a flow should\nbe isomorphic to the compact group (
 G/G^{00}). This conjecture was\nconfirmed for definably amenable groups in
  NIP by Chernikov and Simon\n(2018)\, but was also refuted in NIP for SL(2
 \,R) by Gismatullin\,\nPenazzi and Pillay (2015). Krupiński and Pillay fo
 rmulated a weaker\nversion\, the so-called revised Newelski conjecture\, s
 tating that\,\nunder NIP\, the Ellis group associated with definable group
  dynamics\nhas a Hausdorff (\\tau)-topology. This revised conjecture was c
 onfirmed\nby Chernikov\, Gannon and Krupiński for definable group dynamic
 s in a\nmetrizable setting. Basso and Zucker then extended this result to 
 the\nnon-metrizable setting via forcing\; in fact\, they generalized some\
 nparts of Glasner’s structural results. \nKrupiński and I observed that
  an abstract variant of Newelski’s\noriginal conjecture follows from Gla
 sner’s results for amenable\,\ntame\, minimal and metrizable flows. Our 
 goal was then to remove the\nmetrizability assumption\, as had been done i
 n the case of the revised\nconjecture. This led to results on the amenabil
 ity of the Ellis\nsemigroup and on the measurable structure of amenable mi
 nimal tame\nflows. These results will be presented in two papers. \nThe fi
 rst is already available on arXiv:\nhttps://arxiv.org/abs/2607.24381. \nMC
  5403
DTSTAMP:20261025T180520Z
END:VEVENT
END:VCALENDAR