Stallings foldings and the subgroup structure of free groups

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We re-cast in a more combinatorial and computational form the foldings approach of John Stallings and pursue a detailed study of the subgroup structure of free groups. In particular, we introduce the notions of an "algebraic" and a "free" extension for subgroups of free groups and apply these notions to obtain a number of algebraic and algorithmic results.
41 pages, 10 figures

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Group Theory, 20F

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http://salesiana.dossiersoluciones.com/handle/123456789/63445

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0202285
 http://arxiv.org/abs/math/0202285
 J. Algebra 248 (2002), no 2, pp. 608-668

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arXiv