Przytycki's phase-transition conjecture for random group actions on CAT(0) cube complexes
Przytycki's phase-transition conjecture for random group actions on CAT(0) cube complexes
Let be a finite set of generators, let be a density, and consider a random group in the Gromov density model with density and relator length tending to infinity. A group acts without a global fixed point on a finite-dimensional cube complex if it has no point fixed by the whole group. Przytycki's phase-transition conjecture. Random groups act without a global fixed point on finite-dimensional cube complexes at densities and have property (T) at densities , with overwhelming probability. The conjecture predicts a sharp phase transition at density , complementing the known positive results below and the known property (T) results above ; the intermediate range remains unresolved.
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Primary source
Zachary Munro, “Random Group Actions on CAT(0) Square Complexes”, arXiv:2210.06378 (2022).
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