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Feb 1, 2016 at 3:12 vote accept Alexander Belov
Feb 1, 2016 at 3:12
Jan 31, 2016 at 14:40 comment added Andreas Thom $[a, b] := aba^{-1}b^{-1}$
Jan 31, 2016 at 14:29 comment added Andreas Thom Let me add that $w = [[[XYX,YXY],[XYX,Y]],[[XYYX,YXXY],[X,Y]]]$ is the shortest word that I know for which $\alpha< \pi/2$.
S Jan 31, 2016 at 13:59 history answered Ash Malyshev CC BY-SA 3.0
S Jan 31, 2016 at 13:59 history made wiki Post Made Community Wiki by Ash Malyshev