Abstract
We give a procedure for constructing CAT(-1) free-by-free groups which uses tree valued Morse theory and branched coverings of 2-complexes.
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Brady, N., Miller, A. CAT(-1) Structures for Free-by-Free Groups. Geometriae Dedicata 90, 77–98 (2002). https://doi.org/10.1023/A:1014945318104
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DOI: https://doi.org/10.1023/A:1014945318104