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May 9, 2015 at 3:14 vote accept HenrikRüping
May 8, 2015 at 20:36 answer added Dylan Thurston timeline score: 6
May 8, 2015 at 20:07 comment added HJRW Regarding your motivating example, perhaps it's worth pointing out that all automotphisms of $F_2$ are geometric, and can be realized on the punctured torus.
May 8, 2015 at 18:35 comment added Lee Mosher FYI there is a highly developed theory, with many applications, of the "best" graph homotopy equivalences representing an (outer) automorphism of $F_n$, known as "relative train track representatives".
May 8, 2015 at 18:28 history asked HenrikRüping CC BY-SA 3.0