## Patterson-Sullivan Theory for Subgroups of Mapping Class Groups and Orbit Growth in Teichmüller Space

#### Ilya GekhtmanUniversity of ChicagoMathematics

For a convex cocompact subgroup $G< Mod(S)$ of a mapping class group we construct an analogue of the Bowen-Margulis measure on $Q^1(S)/G$, show that it is mixing, and use this to compute precise multiplicative asymptotics for orbit growth of $G$ in the Teichmüller metric.

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