Equivalence of physical and SRB measures in random dynamical systems

  title={Equivalence of physical and SRB measures in random dynamical systems},
  author={Alex Blumenthal and Lai-Sang Young},
We give a geometric proof, offering a new and quite different perspective on an earlier result of Ledrappier and Young on random transformations. We show that under mild conditions, sample measures of random diffeomorphisms are SRB measures. As sample measures are the limits of forward images of stationary measures, they can be thought of as the analog of physical measures for deterministic systems. Our results thus show the equivalence of physical and SRB measures in the random setting, a… 

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