On a theorem by Farb and Masur

Fujiwara, Koji

doi:10.1090/S0002-9939-00-05450-2

On a theorem by Farb and Masur
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by Koji Fujiwara PDF

Proc. Amer. Math. Soc. 128 (2000), 3463-3464 Request permission

Abstract:

Farb and Masur showed that an irreducible lattice in a semisimple Lie group of rank at least two always has finite image by a homomorphism into the outer automorphism group of a closed, orientable surface group. We point out that their theorem extends to the outer automorphism groups of a certain class of torsion-free, freely indecomposable word-hyperbolic groups.

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