Psuedo-Anosov flows and orbit spaces

I will introduce the audience to pseudo-Anosov flows and related structures on 3-manifolds, and present a simple proof of a theorem of Barbot that says such flows can be completely reconstructed from a group acting on the plane.  This is the setting for much of my recent joint work (with Barthelmé, Bonatti, Fenley and others); time permitting I will give some idea of this theory.  

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