- Long turns, INP's and index for free group automorphisms arxiv link

Auteur(s): Coulbois T., Lustig M.

(Document sans référence bibliographique) 2015-06-15

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The goal of this paper is to introduce a new tool, called {\em long turns}, which is a useful addition to the train track technology for automorphisms of free groups, in that it allows one to control periodic INPs in a train track map and hence the index of the induced automorphism.

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