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Have you any nice example of central divisible subgroup of a finitely presented group ? (of course the subgroup has not to be trivial)

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    This depends on what you understand by a "nice example". Have you read the discussion on MathOverflow: http://mathoverflow.net/questions/23352/ ?2012-07-01
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    I read this discussion and I hoped it was simpler for another divisible group than Q. A nice example would be a well-known group or a presentation with few generators and relators.2012-07-01

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