Automorphisms of character varieties

27 Sep 2019 Marché Julien Simon Christopher-Lloyd

We show that the algebraic automorphism group of the SL(2,C) character variety of a closed orientable surface with negative Euler characteristic is a finite extension of its mapping class group. Along the way, we provide a simple characterization of the valuations on the character algebra coming from measured laminations...

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  • GEOMETRIC TOPOLOGY