Automorphisms of character varieties
arXiv:1909.12539 · doi:10.5802/ahl.82
Abstract
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.
10 pages