English

Random outer automorphisms of free groups: Attracting trees and their singularity structures

Group Theory 2018-06-01 v1 Geometric Topology

Abstract

We prove that a "random" free group outer automorphism is an ageometric fully irreducible outer automorphism whose ideal Whitehead graph is a union of triangles. In particular, we show that its attracting (and repelling) tree is a nongeometric R\mathbb R-tree all of whose branch points are trivalent

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Cite

@article{arxiv.1805.12382,
  title  = {Random outer automorphisms of free groups: Attracting trees and their singularity structures},
  author = {Ilya Kapovich and Joseph Maher and Catherine Pfaff and Samuel J. Taylor},
  journal= {arXiv preprint arXiv:1805.12382},
  year   = {2018}
}

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R2 v1 2026-06-23T02:14:28.120Z