157 citations · 554 across the 9 of their papers we have counts for
9 papers
Is there proof that backreaction of inhomogeneities is irrelevant in cosmology?
T. Buchert, M. Carfora, G. F. R. Ellis +8
No. In a number of papers Green and Wald argue that the standard FLRW model approximates our Universe extremely well on all scales, except close to strong field astrophysical objec…
Multiverses and physical cosmology
G. F. R. Ellis, U. Kirchner, W. R. Stoeger
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 univer…
A Solution to the Graceful Exit Problem in Pre-Big Bang Cosmology
G. F. R. Ellis, D. C. Roberts, D. Solomons +1
We examine the string cosmology equations with a dilaton potential in the context of the Pre-Big Bang Scenario with the desired scale factor duality, and give a generic algorithm f…
Classical Signature Change in the Black Hole Topology
Charles Hellaby, Ariel Sumeruk, G. F. R. Ellis
Investigations of classical signature change have generally envisaged applications to cosmological models, usually a Friedmann-Lemaitre-Robertson-Walker model. The purpose has been…
Caustics of Compensated Spherical Lens Models
G. F. R. Ellis, D. M. Solomons
We consider compensated spherical lens models and the caustic surfaces they create in the past light cone. Examination of cusp and crossover angles associated with particular sourc…
Shrinking II -- The Distortion of the Area Distance-Redshift Relation in Inhomogeneous Isotropic Universes
Nazeem Mustapha, B. A. Bassett, Charles Hellaby +1
This paper and the others in the series challenge the standard model of the effects of gravitational lensing on observations at large distances. We show that due to the cumulative…