We show that every group with free Zopf;n-length function is CAT(0).

Additional Metadata
Persistent URL dx.doi.org/10.1112/jlms/jdt037
Journal Journal of the London Mathematical Society
Citation
Bumagin, I, & Kharlampovich, O. (Olga). (2013). Zopf;n-free groups are CAT(0). Journal of the London Mathematical Society, 88(3), 761–778. doi:10.1112/jlms/jdt037