On asymptotic dimension of groups.
On central extensions of mapping class groups.
On Certain Permuation Representations of Mapping Class Groups.
On J.H.C. Whitehead's aspherical question I.
On the Conjugacy Problem for Knot Groups.
On the cut number of a 3-manifold.
On the dynamics and the fixed subgroup of a free group automorphism.
On the existence of universal covering spaces for metric spaces and subsets of the Euclidean plane
We prove several results concerning the existence of universal covering spaces for separable metric spaces. To begin, we define several homotopy-theoretic conditions which we then prove are equivalent to the existence of a universal covering space. We use these equivalences to prove that every connected, locally path connected separable metric space whose fundamental group is a free group admits a universal covering space. As an application of these results, we prove the main result of this article,...
On the Farrell cohomology of mapping class groups.
On the linearity problem for mapping class groups.
On the Uniqueness of Some Affinely Flat Infra-nilmanifolds.
Outer automorphism groups of Bieberbach groups.