Brück, Benjamin; Gupta, Radhika: Homotopy type of the complex of free factors of a free group. In: Proceedings of the London Mathematical Society. Jg.121 H. 6. 2020, S. 1737-1765

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2. Preliminaries on poset topology
3. Outer space and its relatives
4. Posets of graphs
5. Contractibility of relative free splitting complexes
6. Factor complexes at infinity
7. Higher connectivity of factor complexes
8. Some remarks
Appendix
References

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