Reduced Bers boundaries of Teichmüller spaces

Details Reduced Bers boundaries of Teichmüller spaces Reduced Bers boundaries of Teichmüller spaces

2011-03-24

arxiv.org/abs/1103.4680v2

Mathematics

Geometric Topology

Ver 2: minor corrections

Scientific paper

We consider a quotient space of the Bers boundary of Teichm\"{u}ller space, which we call the reduced Bers boundary, by collapsing each quasi-conformal deformation space into a point. This reduced Bers boundary turns out to be independent of the basepoint, and the action of the mapping class group on the Teichm\"{u}ller space extends continuously to this boundary. We show that every auto-homeomorphism on the reduced Bers boundary comes from an extended mapping class. We also give a way to determine the limit in the reduced Bers boundary up to some ambiguity for parabolic curves for a given sequence in the Teichm\"{u}ller space, by generalising the Thurston compactification.

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