Characterizing rigid simplicial actions on trees

Details Characterizing rigid simplicial actions on trees Characterizing rigid simplicial actions on trees

2004-09-15

arxiv.org/abs/math/0409245v1

Geometric methods in group theory, Contemporary Mathematics 372 (2005), 27-33

Mathematics

Group Theory

Geometric methods in group theory (2004) to appear

Scientific paper

We extend Forester's rigidity theorem so as to give a complete
characterization of rigid group actions on trees (an action is rigid if it is
the only reduced action in its deformation space, in particular it is invariant
under automorphisms preserving the set of elliptic subgroups).

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