Aspects of superstring cosmology are reviewed with an emphasis on the cosmological
implications of duality symmetries in the theory. The string effective actions are summarized …

The idea of a multiverse—an ensemble of universes—has received increasing attention in
cosmology, both as the outcome of the originating process that generated our own Universe …

This authoritative volume shows how modern dynamical systems theory can help us in
understanding the evolution of cosmological models. It also compares this approach with …

Einstein's field equations are studied under the assumptions that (1) the source of the
gravitational field is a perfect fluid, and (2) there exists a group of motions simply transitive …

We consider perfect fluid spatially homogeneous cosmological models. Starting with a new
exact solution of Blanchi type VIII, we study generalizations which lead to new classes of …

The aim of this set of lectures is a systematic presentation of a 1+ 3 covariant approach to
studying the geometry, dynamics, and observational properties of relativistic cosmological …

Addressing a variety of theoretical cosmological problems, and emphasizing a mathematical
approach, this volume nicely complements Peebles' Physical Cosmology (Princeton Series …

Observations indicate that the universe is effectively flat, but they do not rule out a closed
universe. The role of positive curvature is negligible at late times, but can be crucial in the …

We examine spatially homogeneous cosmological models in which the matter content of
space-time is a perfect fluid, and in which the fluid flow vector is not normal to the surfaces of …

The behaviour near to and far from an initial singularity in a broad subclass of the models
studied in previous papers [1–3] is examined. The influence of the matter on the evolution at …