172 citations · 265 across the 4 of their papers we have counts for
4 papers
Clumps into Voids
Nazeem Mustapha, Charles Hellaby
We consider a spherically symmetric distribution of dust and show that it is possible, under general physically reasonable conditions, for an overdensity to evolve to an underdensi…
Partially locally rotationally symmetric perfect fluid cosmologies
Nazeem Mustapha, George F R Ellis, Henk van Elst +1
We show that there are no new consistent cosmological perfect fluid solutions when in an open neighbourhood of an event the fluid kinematical variables and the electric…
Large Scale Inhomogeneity Versus Source Evolution -- Can We Distinguish Them Observationally?
Nazeem Mustapha, Charles Hellaby, G. F. R. Ellis
We reconsider the issue of proving large scale spatial homogeneity of the universe, given isotropic observations about us and the possibility of source evolution both in numbers an…
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…