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I am learning Reidemeister--Schreier method, a method determining explicitly presentations for subgroups of a given group. Can anyone recommend some introductory material, preferably those with detailed examples of computation on this topic?

Many thanks in advance.

Zuriel
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  • Related: http://math.stackexchange.com/questions/398375/intuitive-understanding-of-the-reidemeister-schreier-theorem – Seirios Sep 30 '14 at 20:21

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Perhaps the best book for this is Johnson (Amazon). Also very good is the classic Magnus, Karrass and Solitar (Amazon), which has a large number of exercises for practice.

James
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