Séminaires : Séminaire Général de Logique

Equipe(s) : lm,
Responsables :O. Finkel, T. Ibarlucía, A. Khélif, S. Rideau, C. Sureson
Email des responsables :
Salle : salle 2015
Adresse :Sophie Germain
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Orateur(s) Matthew Foreman - University of California,
Titre A solution to a problem of von Neumann
Date06/03/2017
Horaire15:10 à 16:10
Résume In 1932 von Neumann proposed classifying the statistical behavior of diffeomorphisms of manifolds. In modern language this is restated as classifying the equivalence relation of measure theoretic isomorphism. The main theorem in this talk is that the classification problem is impossible. The equivalence relation is not Borel. As part of the proof a “Global Structure Theorem” is proved that settle a couple of open questions about another classical problem, the “realization problem.” This is joint work with B. Weiss.
Sallesalle 2015
AdresseSophie Germain
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