7 citations · 15 across the 10 of their papers we have counts for
11 papers
Proper actions of discrete groups of affine transformations
Jeffrey Danciger, Todd A. Drumm, William M. Goldman +1
In the early 1980's Margulis startled the world by showing the existence of proper affine actions of free groups on 3-space, answering a provocative and suggestive question Milnor…
Tameness of Margulis space-times with parabolics
Suhyoung Choi, Todd Drumm, William Goldman
Let be a flat Lorentzian space of signature . A Margulis space-time is a noncompact complete flat Lorentzian -manifold with a free holonomy g…
Bisectors determining unique pairs of points in the bidisk
Virginie Charette, Todd A. Drumm, Youngju Kim
Bisectors are equidistant hypersurfaces between two points and are basic objects in a metric geometry. They play an important part in understanding the action of subgroups of isome…
Proper affine deformation spaces of two-generator Fuchsian groups
Virginie Charette, Todd A. Drumm, William M. Goldman
A Margulis spacetime is a complete flat Lorentzian 3-manifold M with free fundamental group. Associated to M is a noncompact complete hyperbolic surface S homotopy-equivalent to M.…
Crooked Halfspaces
Jean-Philippe Burelle, Virginie Charette, Todd Drumm +1
We develop the Lorentzian geometry of a crooked halfspace in 2+1-dimensional Minkowski space. We calculate the affine, conformal and isometric automorphism groups of a crooked half…
Equidistant hypersurfaces of the bidisk
Virginie Charette, Todd A. Drumm, Rosemonde Lareau-Dussault
The following are notes on the geometry of the bidisk. In particular, we examine the properties of equidistant surfaces in the bidisk.