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Sep 19, 2021 at 9:31 history made wiki Post Made Community Wiki by Stefan Kohl
Dec 15, 2012 at 18:16 comment added Misha I'd also add here the Tits' alternative, which is a far-reaching generalization of the Hausdorff's paradox (precursor to Banach-Tarski), which was based on a construction free subgroups in $SO(3)$.
Dec 15, 2012 at 16:08 history answered Todd Trimble CC BY-SA 3.0