311 citations · 1.9k across the 99 of their papers we have counts for
5 papers · 1 filter
Observational Approaches to the Topology of the Universe
Boudewijn F. Roukema
Many different and complementary strategies for translating the basic principle of multiple topological imaging into observational analysis are now available, both for three-dimens…
The Topology of the Universe
Boudewijn F. Roukema
The Hilbert-Einstein equations are insufficient to describe the geometry of the Universe, as they only constrain a local geometrical property: curvature. A global knowledge of the…
Cosmological Topology in Paris 1998
Vincent Blanloeil, Boudewijn F. Roukema
Quel est, ou pourrait être, la topologie globale de la partie spatiale de l'Univers ? L'Univers entier (précisément, l'hypersurface spatiale de celui-ci) est-il observable ? Les ma…
Lifting cosmic degeneracy within a single quasar survey
Boudewijn F. Roukema, Gary A. Mamon
In the almost Friedmann-Lema^itre model of the Universe, the density parameter, Omega_matter, and the cosmological constant, Omega_Lambda, measure curvature. Several linearly degen…
A Counterexample to Claimed COBE Constraints on Compact Toroidal Universe Models
Boudewijn F. Roukema
It has been suggested that if the Universe satisfies a flat, multiply connected, perturbed Friedmann-Lema^itre model, then cosmic microwave background data from the COBE satellite…