The topology at infinity of Out(Fn)

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Connectivity at infinity for right angled Artin groups (2000, background): “Notable recent examples of higher connectivity at innity computations include those done for Coxeter groups ([Da 2]) and the group of outer automorphisms of free groups ([R], [V], and most recently [ BF ]).”
The Patterson–Sullivan Embedding and Minimal Volume Entropy for Outer Space (2005, background): “We refer the reader to [14, 9, 3, 20] for a detailed discussion and the proofs of the basic facts that are listed in this section.”
Homotopy type of the complex of free factors of a free group (2018, background): “The fibres one obtains and needs to analyse here correspond to posets of graphs with a labelling of the vertices (as described, for example, in [1]).”
The actions of ${\mathit{Out}(F_k)}$ on the boundary of Outer space and on the space of currents: minimal sets and equivariant incompatibility (2006, background): “Conventions regarding Outer space We refer the reader to [1, 10, 11, 13, 27] for detailed information regarding Outer space and its boundary.”
Automorphism groups of free groups, surface groups and free abelian groups (2005, background): “Teichmüller space and Outer space both admit useful bordifications that are closely analogous to the Borel-Serre bordification [44, 53, 2].”