Questions such as whether we live in a spatially finite universe, and what its shape and size
may be, are among the fundamental open problems that high precision modern cosmology …

Abstract “One could imagine that as a result of enormously extended astronomical
experience, the entire universe consists of countless identical copies of our Milky Way, that …

This paper gives the construction and complete classification of all three-dimensional
spherical manifolds and orders them by decreasing volume, in the context of multi …

Aims. Analyses of recent cosmic microwave background (CMB) observations have provided
increasing hints that there are deviations in the universe from statistical isotropy on large …

Aims. We study the large-scale angular correlation signatures of the cosmic microwave
background (CMB) temperature fluctuations from WMAP data in several spherical cap …

It has recently been suggested by Luminet et al.([CITE]) that the WMAP data are better
matched by a geometry in which the topology is that of a Poincaré dodecahedral model and …

Recent observations suggest that the ratio of the total density to the critical density of the
universe, Ω 0, is likely to be very close to one, with a significant proportion of this energy …

When the density parameter is close to unity, the universe has a large curvature radius
independent of its being hyperbolic or spherical, or in the limiting case of an infinite …

In this work we study to which extent the knowledge of spatial topology may place
constraints on the parameters of the generalized Chaplygin gas (GCG) model for unification …

Recent analyses of the WMAP data seem to indicate the possible presence of large-angle
anisotropy in the Universe. If confirmed, these can have important consequences for our …