Special IMM groups
Abstract
Italiano-Martelli-Migliorini recently constructed hyperbolic groups which have non-hyperbolic subgroups of finite type. Using a closely related construction, Llosa Isenrich-Martelli-Py constructed hyperbolic groups with subgroups of type F3 but not F4. We observe that these hyperbolic groups can be chosen to be special in the sense of Haglund-Wise.
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