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Published December 2015 | public
Journal Article Open

Filtered screens and augmented Teichmüller space


We study a new bordification of the decorated Teichmüller space for a multiply punctured surface F by a space of filtered screens on the surface that arises from a natural elaboration of earlier work of McShane–Penner. We identify necessary and sufficient conditions for paths in this space of filtered screens to yield short curves having vanishing length in the underlying surface F . As a result, an appropriate quotient of this space of filtered screens on F yields a decorated augmented Teichmüller space which is shown to admit a CW decomposition that naturally projects to the augmented Teichmüller space by forgetting decorations and whose strata are indexed by a new object termed partially oriented stratum graphs.

Additional Information

© 2015 Springer Science+Business Media Dordrecht. Received: 20 July 2013; Accepted: 14 May 2015p; Published online: 23 May 2015. Douglas J. LaFountain and R. C. Penner have been supported by the Center for Quantum Geometry of Moduli Spaces funded by the Danish National Research Foundation. It is furthermore a pleasure to thank Scott Wolpert for helpful input.

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August 20, 2023
August 20, 2023