Abstract
We give a proof of Rips’ theorem that a finitely generated group acting freely on an ℝ-tree is a free product of free abelian groups and surface groups, using methods of dynamical systems and measured foliations.
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Gaboriau, D., Levitt, G. & Paulin, F. Pseudogroups of isometries of ℝ and Rips’ theorem on free actions on ℝ-trees. Israel J. Math. 87, 403–428 (1994). https://doi.org/10.1007/BF02773004
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DOI: https://doi.org/10.1007/BF02773004