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Feb 8, 2019 at 2:21 comment added Danny Ruberman For the case $n=3$ see the answers to the post mathoverflow.net/questions/219313/…
Feb 8, 2019 at 2:21 answer added Danny Ruberman timeline score: 4
Feb 7, 2019 at 23:36 comment added few_reps At least, any reflection subgroup should be a solution ...
Feb 7, 2019 at 23:12 history asked Totoro CC BY-SA 4.0