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May 9, 2016 at 1:30 answer added David E Speyer timeline score: 1
May 8, 2016 at 16:19 vote accept CommunityBot
May 8, 2016 at 11:06 answer added Geoff Robinson timeline score: 15
May 8, 2016 at 10:33 answer added Zach Teitler timeline score: 15
May 8, 2016 at 9:48 comment added Geoff Robinson ${\rm SL}(2,\mathbb{Z})$ has a free normal subgroup of index 12 such that the factor group is cyclic.
May 8, 2016 at 9:13 review First posts
May 8, 2016 at 9:29
May 8, 2016 at 9:09 history asked user81684 CC BY-SA 3.0