Hyperbolic 4-manifolds and conformally flat 3-manifolds
Hyperbolic 4-manifolds and tesselations
Infinite group actions on spheres.
This paper is mainly intended as a survey of the recent work of a number of authors concerning certain infinite group actions on spheres and to raise some as yet unanswered questions. The main thrust of the current research in this area has been to decide what topological and geometrical properties characterise the infinite conformal or Möbius groups. One should then obtain reasonable topological or geometrical restrictions on a subgroup G of the homeomorphism group of a sphere which will imply...
Invariant metrics on -spaces
Let be a -space such that the orbit space is metrizable. Suppose a family of slices is given at each point of . We study a construction which associates, under some conditions on the family of slices, with any metric on an invariant metric on . We show also that a family of slices with the required properties exists for any action of a countable group on a locally compact and locally connected metric space.
Jørgensen's inequality for discrete convergence groups.
Klein Hyperbottle
Knots Fixed by Zp-Actions and Periodic Links.
Lifting smooth homotopies of orbit spaces of proper Lie group actions.
Limits of (certain) CAT(0) groups. I: Compactification.
Metric rigidity of crystallographic groups.
Minimal dimensions for flat manifolds with prescribed holonomy.
Modular circle quotients and PL limit sets.
Nonstandard uniformized conformal structures on hyperbolic manifolds.
Octahedral Noncompact Hyperbolic Space Forms With Finite Volume
On conformally flat Lorentz parabolic manifolds
We introduce conformally flat Fefferman-Lorentz manifold of parabolic type as a special class of Lorentz parabolic manifolds. It is a smooth (2n+2)-manifold locally modeled on (Û(n+1, 1), S 2n+1,1). As the terminology suggests, when a Fefferman-Lorentz manifold M is conformally flat, M is a Fefferman-Lorentz manifold of parabolic type. We shall discuss which compact manifolds occur as a conformally flat Fefferman-Lorentz manifold of parabolic type.
On fixed point free involutions of
On spaces with periodic cohomology.
On the Uniqueness of Some Affinely Flat Infra-nilmanifolds.
Orbifold-Uniformizing Differential Equations.
Orbifold-Uniformizing Differential Equations. III. Arrangements Defined by 3-Dimensional Primitive Unitary Reflection Groups.