Geometry and Topology : Proceedings of the Special Year held at the University of Maryland College Park 1983–1984 Lower postnikov terms of generalized CW complexes and semi simple actions 3 fold branched coverings and the mapping class group of a surface Locally flat embeddings of three dimensional manifolds in four dimensional manifolds Differential characters and geometric invariants Minimal branched immersions into three manifolds Representations of fundamental groups of surfaces Comparison theorems for volumes in surfaces The isometry invariant geodesics problem: Closed and open Attractors for discrete time monotone dynamical systems in strongly ordered spaces Presentation classes 3 manifolds and free products Proper actions on homogeneous spaces Deformation spaces for seifert manifolds Abelian invariants of satellite knots An introduction to compactifying spaces of hyperbolic structures by actions on trees A note on an invariant of fintushel and stern Handlebodies and 2 complexes Extrema associated with homotopy classes of maps Geometries and geometric structures in real dimension 4 and complex dimension 2.