Titlebook: Arboreal Group Theory; Proceedings of a Wor Roger C. Alperin Conference proceedings 1991 Springer-Verlag New York, Inc. 1991 Group theory.a

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Conference proceedings 1991 the product of that meeting. The program centered on the topic of the theory of groups acting on trees and the various applications to hyperbolic geometry. Topics include the theory of length functions, structure of groups acting freely on trees, spaces of hyperbolic structures and their compactifi

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Andreas Braun,Henning Heggen,Reiner Wichertconjugacy classes in ... Since actions differing by a scalar multiple define the same point of outer space, we have a map from .. to the infinite dimensional projective space .. = ℝ. — {0}/ℝ.. It can be shown that this map is injective (see [.] or [.]). We topologize .. as a subspace of ...

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The Polish Labour Market in Transition,t of fundamental groups of surfaces and of free abelian groups. This led Morgan and Shalen to conjecture that the only finitely generated groups which act freely on an ℝ-tree are free products of fundamental groups of surfaces and free abelian groups.

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Evaluating Active Labour Market Policiesn . = π.(.), . a hyperbolic manifold. The tree and action then give a codimension-1 measured lamination on . Applications include the theory of incompressible surfaces in 3-manifolds and the description of a natural boundary for Teichmüller space. The points at infinity correspond to π. (.)-actions on ℝ-trees.

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Axioms for Translation Length Functions,cial tree, the branching occurs at a discrete set of points, namely, the vertices, whereas in an ℝ-tree, there is no restriction on where branching may occur. The notion of ℝ-tree arose indirectly in the work of Lyndon [.]and Chiswell [.]concerning Lyndon length functions. The first definition was given by Tits in [.].

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0940-4740 volume is the product of that meeting. The program centered on the topic of the theory of groups acting on trees and the various applications to hyperbolic geometry. Topics include the theory of length functions, structure of groups acting freely on trees, spaces of hyperbolic structures and their

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