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Jul 17, 2013 at 19:53 vote accept David E Speyer
Jul 17, 2013 at 19:41 answer added Peter Dalakov timeline score: 2
Jul 17, 2013 at 19:32 answer added Fran Burstall timeline score: 3
Jul 17, 2013 at 17:54 history asked David E Speyer CC BY-SA 3.0