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A presentation for Aut(Fn)
Heather Armstrong, Bradley Forrest and Karen Vogtmann
To appear in Journal of Group Theory
 
We study the action of the group Aut(Fn) of automorphisms of a finitely generated free group on the degree 2 subcomplex of the spine of Auter space. Hatcher and Vogtmann showed that this subcomplex is simply connected, and we use the method described by K. S. Brown to deduce a new presentation of Aut(Fn).