Non-residual-finiteness conjecture for random BMW groups

A BMW group is a group acting on a product of two regular trees, and a BMW group of degree (m,n)(m,n) has tree factors of degrees mm and nn. In the range n>m5n>m^5, consider the random BMW group from the paper's random model. A group is residually finite if every nontrivial element survives in some finite quotient, and virtually simple if it has a simple subgroup of finite index. Non-residual-finiteness conjecture. In the above range of mm and nn, a random BMW group is asymptotically almost surely not residually finite and consequently is virtually simple by Theorem~. This predicts that the random model typically produces virtually simple groups, beyond the established high-probability hereditary just-infiniteness result; the status of the conjecture is not specified in the source.

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Primary source

Nir Lazarovich, Ivan Levcovitz and Alex Margolis, “Counting lattices in products of trees”, arXiv:2202.00378 (2022).

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