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تسجيل مستخدم جديدMoyennabilite interieure et extensions HNN
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تأليف
Yves Stalder
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We present sufficient conditions for HNN extensions to be inner amenable, respectively ICC, which give necessary and sufficient criteria among Baumslag-Solitar groups. We deduce that such a group, viewed as acting on its Bass-Serre tree, contains non trivial elements which fix unbounded subtrees.
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