Pleating coordinates for the Teichmüller space of a punctured torus

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Linda Keen, Caroline Series

We construct new coordinates for the Teichmüller space Teich of a punctured torus into $\bold{R} \times\bold{R}^+$. The coordinates depend on the representation of Teich as a space of marked Kleinian groups Gμ that depend holomorphically on a parameter μ varying in a simply connected domain in $\bold{C}$. They describe the geometry of the hyperbolic manifold $\bold{H}^3/G_\mu$; they reflect exactly the visual patterns one sees in the limit sets of the groups Gμ; and they are directly computable from the generators of Gμ.

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