Abstract
We present a simple proof of the fact that every countable group Γ is weak Rohlin, that is, there is in the Polish space double-struck A Γ of measure preserving Γ-actions an action T whose orbit in double-struck AΓ under conjugations is dense. In conjunction with earlier results this in turn yields a new characterization of non-Kazhdan groups as those groups which admit such an action T which is also ergodic.
Original language | English |
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Pages (from-to) | 932-936 |
Number of pages | 5 |
Journal | Bulletin of the London Mathematical Society |
Volume | 38 |
Issue number | 6 |
DOIs | |
State | Published - Dec 2006 |