Laminations, trees, and irreducible automorphisms of free groups
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We examine the action of Out(F n ) on the set of (irreducible) laminations. Consequences include a special case of the Tits alternative for Out(F n ), the discreteness of certain naturally arising group actions on trees, and word hyperbolicity of certain semidirect products.
KeywordsFree Group Group Action Semidirect Product Irreducible Automorphism
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