346 citations · 3.7k across the 115 of their papers we have counts for
6 papers · 2 filters
Gravitational entropy in cosmological models
Nicos Pelavas, Alan Coley
We discuss whether an appropriately defined dimensionless scalar function might be an acceptable candidate for the gravitational entropy, by explicitly considering Szekeres and Bia…
Future Asymptotic Behaviour of Tilted Bianchi models of type IV and VIIh
Sigbjorn Hervik, Robert van den Hoogen, Alan Coley
Using dynamical systems theory and a detailed numerical analysis, the late-time behaviour of tilting perfect fluid Bianchi models of types IV and VII are investigated. In parti…
A dynamical systems approach to the tilted Bianchi models of solvable type
Alan Coley, Sigbjorn Hervik
We use a dynamical systems approach to analyse the tilting spatially homogeneous Bianchi models of solvable type (e.g., types VI and VII) with a perfect fluid and a linear…
Bianchi Cosmologies: A Tale of Two Tilted fluids
Alan A. Coley, Sigbjorn Hervik
We use a dynamical systems approach to study Bianchi type VI cosmological models containing two tilted -law perfect fluids. The full state space is 11-dimensional, but the e…
Brane Waves
Alan A. Coley, Sigbjorn Hervik
In brane-world cosmology gravitational waves can propagate in the higher dimensions (i.e., in the `bulk'). In some appropriate regimes the bulk gravitational waves may be approxima…
Classification of the Weyl Tensor in Higher Dimensions
A. Coley, R. Milson, V. Pravda +1
We discuss the algebraic classification of the Weyl tensor in higher dimensional Lorentzian manifolds. This is done by characterizing algebraically special Weyl tensors by means of…