311 citations · 1.9k across the 99 of their papers we have counts for
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Cosmic crystallography using short-lived objects - active galactic nuclei
Andrzej Marecki, Boudewijn F. Roukema, Stanislaw Bajtlik
Cosmic crystallography is based on the principle that peaks in the pair separation histogram (PSH) of objects in a catalogue should be induced by the high number of topologically l…
A constraint on any topological lensing hypothesis in the spherical case: it must be a root of the identity
Boudewijn F. Roukema
Three-dimensional catalogues of objects at cosmological distances can potentially yield candidate topologically lensed pairs of sets of objects, which would be a sign of the global…
A Solution to the Isolatitude, Equi-area, Hierarchical Pixel-Coordinate System
Boudewijn F. Roukema, Bartosz Lew
Gorski et al (1999b) have earlier presented the outline of a pixelisation-to-spherical-coordinate transformation scheme which simultaneously satisfies three properties which are es…
A Hint of Poincaré Dodecahedral Topology in the WMAP First Year Sky Map
Boudewijn F. Roukema, Bartosz Lew, Magdalena Cechowska +2
Luminet et al. (2003) suggested that WMAP data are better matched by a Poincaré dodecahedral FLRW model of global geometry, rather than by an infinite flat model. The analysis by C…