Coarse-convergence conjecture for Morse boundaries of hierarchically hyperbolic groups

Let GG be a hierarchically hyperbolic group (HHG), and let MG\partial_M G be its Morse boundary. Assume that GG admits a largest acylindrical action. The topology on MG\partial_M G induced by this action is the topology of coarse convergence of hierarchy paths. Coarse-convergence conjecture. The topology on the Morse boundary of an HHG induced by its largest acylindrical action is the topology of coarse convergence of hierarchy paths. Largest acylindrical actions are known to exist for all hierarchically hyperbolic groups and to be κ\kappa-injective, but identifying the induced topology with coarse convergence of hierarchy paths remains open.

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Primary source

Carolyn Abbott and Merlin Incerti-Medici, “Hyperbolic projections and topological invariance of sublinearly Morse boundaries”, arXiv:2212.09539 (2022).

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