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Free subgroups of one-relator relative presentations | Anton A. Klyachko
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27 Oct 2005 | Abstract: | Suppose that G is a nontrivial torsion-free group and w is a word over the alphabet Gcup{x_1^{pm1},...,x_n^{pm1}}. It is proved that for nge2 the group ~G= always contains a nonabelian free subgroup. For n=1 the question about the existence of nonabelian free subgroups in ~G is answered completely in the unimodular case (i.e., when the exponent sum of x_1 in w is one). Some generalisations of these results are discussed. | Source: | arXiv, math.GR/0510582 | Other source: | [GID 52137] math/0510582 | Services: | Forum | Review | PDF | Favorites |
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