128 citations · 932 across the 43 of their papers we have counts for
5 papers · 2 filters
Properties of kinematic singularities
A. A. Coley, S. Hervik, W. C. Lim +1
The locally rotationally symmetric tilted perfect fluid Bianchi type V cosmological model provides examples of future geodesically complete spacetimes that admit a `kinematic singu…
Cosmological Observations: Averaging on the Null Cone
A. A. Coley
The universe is not isotropic or spatially homogeneous on local scales. The averaging of local inhomogeneities in general relativity can lead to significant dynamical effects on th…
Lorentzian spacetimes with constant curvature invariants in four dimensions
Alan Coley, Sigbjorn Hervik, Nicos Pelavas
In this paper we investigate four dimensional Lorentzian spacetimes with constant curvature invariants ( spacetimes). We prove that if a four dimensional spacetime is , t…
Spacetimes characterized by their scalar curvature invariants
Alan Coley, Sigbjorn Hervik, Nicos Pelavas
In this paper we determine the class of four-dimensional Lorentzian manifolds that can be completely characterized by the scalar polynomial curvature invariants constructed from th…
Kundt Spacetimes
A. Coley, S. Hervik, G. Papadopoulos +1
Kundt spacetimes are of great importance in general relativity in 4 dimensions and have a number of topical applications in higher dimensions in the context of string theory. The d…