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math.GR2001
Splittings of mapping tori of free group automorphisms
Peter Brinkmann
We present necessary and sufficient conditions for the existence of a splitting over of the mapping torus of a free group automorphism .
math.GR1999
Hyperbolic automorphisms of free groups
Peter Brinkmann
We prove that an automorphism of a finitely generated free group is hyperbolic in the sense of Gromov if it has no nontrivial periodic conjugacy classes.
math.GR1999
An Implementation of the Bestvina-Handel Algorithm for Surface Homeomorphisms
Peter Brinkmann
Bestvina and Handel have found an effective algorithm that determines whether a given homeomorphism of an orientable, possibly punctured surface is pseudo-Anosov. We present a soft…