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Nov 29, 2017 at 17:59 comment added Ed Formanek @YCor. I did mean "torsion-free nilpotent".
Apr 16, 2016 at 17:22 comment added YCor I guess you mean "residually torsion-free nilpotent"
Nov 17, 2014 at 8:35 vote accept Zuriel
Nov 16, 2014 at 1:08 history answered Ed Formanek CC BY-SA 3.0