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Very small group actions on R-trees and dehn twist automorphisms
LENGTH functions on a group G which come from actions on R-trees [20,29,10,3,37] and spaces of such length functions have been of central importance in combinatorial group theory in recent years. We… Expand
An Empirical Test of a Model of Resistance to Persuasion.
This investigation synthesized research from several related areas to produce a model of resistance to persuasion based upon variables not considered by earlier congruity and inoculation models.… Expand
PATHS OF GEODESICS AND GEOMETRIC INTERSECTION NUMBERS: II
On the dynamics and the fixed subgroup of a free group automorphism
On considere des automorphismes φ:F n →F n , ou F n =F(a 1 ,…,a n ) est le groupe libre de base a 1 ,a 2 ,…,a n (n≥2). On compose un champ vectoriel sur un graphe D(φ). On introduit des aretes… Expand
A GENERAL THEORY OF RELATIVE REGULAR NEIGHBORHOODS
- M. M. Cohen
- 1 February 1969
Regular neighborhoods of polyhedra in manifolds have been discussed in many papers, most notably, in the present context, in [W], [H-Z], [H] and [S]. We study regular neighborhoods of X mod Y in Z… Expand
ℝ-Tree Actions are Not Determined by the Translation Lengths of Finitely Many Elements
In their basic paper [C-M] Culler and Morgan emphasize the analogy between conjugacy classes of representations of a group G in SO ℝ + (2,1) = PSL(2,ℝ), and translation length functions on G which… Expand
The surjectivity problem for one-generator, one-relator extensions of torsion-free groups
We prove that the natural map G! b G ,w here Gis a torsion-free group and b G is obtained by adding a new generator t and a new relator w, is surjective only if w is conjugate to gt or gt 1 where g2… Expand