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Feb 14, 2019 at 7:58 comment added Dominic van der Zypen @ramirodelavega This exercise kept me busy during a long (and boring) business meeting - thanks! (PS, haven't quite cracked it yet.)
Feb 13, 2019 at 22:06 comment added YCor Thanks! This is actually a locally connected and connected topological group $H$, which has exponent 2.
Feb 13, 2019 at 21:31 history answered Ramiro de la Vega CC BY-SA 4.0