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math.DS2004
Sur les espaces mesures singuliers II - Etude spectrale
Mikael Pichot
We are mainly interested here in Kazhdan's property T for measured equivalence relations. Among our main results are characterizations of strong ergodicity and Kazhdan's property i…
math.DS2004
Sur les espaces mesures singuliers I - Etude metrique-mesuree
Mikael Pichot
Recall Jones-Schmidt theorem that an ergodic measured equivalence relation is strongly ergodic if and only if it has no nontrivial amenable quotient. We give two new characterizati…