比利时vs摩洛哥足彩
,
university of california san diego
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math 243 - functional analysis seminar
pieter spaas
ucla
furstenberg-zimmer structure theory for actions on von neumann algebras
abstract:
in classical ergodic theory, compact and weakly mixing actions/extensions have been well-studied. the main structural result from furstenberg and zimmer states that every action can be written as "a weakly mixing extension of a tower of compact extensions". we will discuss some of these classical results and their motivation, and consider similar notions for actions on von neumann algebras which have been defined throughout the years. we will then complete (part of) the picture by establishing equivalence of several such notions, followed by some consequences and open questions. this is partially based on joint work with asgar jamneshan.
host: adrian ioana
april 19, 2022
11:00 am
apm 7218 and zoom
email djekel@ucsd.edu for zoom info
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