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May 14, 2014 at 5:56 vote accept yanqing
May 10, 2014 at 15:22 history edited Misha CC BY-SA 3.0
added 374 characters in body
May 10, 2014 at 3:52 comment added yanqing Would you mind explain these words: you can find a free rank k subgroup Fk<Pg<G such that Fk, and a generate G
May 9, 2014 at 15:01 history answered Misha CC BY-SA 3.0