Abstract.
We prove that an automorphism \( {\not o} : F \to F \) of a finitely generated free group F is hyperbolic in the sense of Gromov if it has no nontrivial periodic conjugacy classes. This result was previously claimed (but not proved) in [BF1].
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Submitted: April 1999, Revised version: July 1999, Final version: September 1999.
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Brinkmann, P. Hyperbolic automorphisms of free groups . GAFA, Geom. funct. anal. 10, 1071–1089 (2000). https://doi.org/10.1007/PL00001647
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DOI: https://doi.org/10.1007/PL00001647