A short proof of Handel and Mosher's alternative for subgroups of Out
Camille Horbez
Université Paris-Sud, Orsay, France
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Abstract
We give a short proof of a theorem of Handel and Mosher [21] stating that any finitely generated subgroup of Out either contains a fully irreducible automorphism, or virtually fixes the conjugacy class of a proper free factor of , and we extend their result to non finitely generated subgroups of Out.
Cite this article
Camille Horbez, A short proof of Handel and Mosher's alternative for subgroups of Out. Groups Geom. Dyn. 10 (2016), no. 2, pp. 709–721
DOI 10.4171/GGD/361