Have you any nice example of central divisible subgroup of a finitely presented group ? (of course the subgroup has not to be trivial)
Central divisible subgroup
2
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group-theory
group-presentation
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0This 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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0I 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