Spikes in the Mixmaster regime of G_2 cosmologies (2009)
Lim, Woei Chet, Andersson, Lars, Garfinkle, David, Pretorius, Frans
We produce numerical evidence that spikes in the Mixmaster regime of G_2 cosmologies are transient and recurring, supporting the conjecture that the generalized Mixmaster behavior is asymptotically...
Spikes in the Mixmaster regime of G2 cosmologies (2009)
Lim, Woei Chet, Andersson, Lars, Garfinkle, David, Pretorius, Frans
We produce numerical evidence that spikes in the Mixmaster regime of G2 cosmologies are transient and recurring, supporting the conjecture that the generalized Mixmaster behavior is asymptotically...
Evolution to a smooth universe in an ekpyrotic contracting phase with w > 1 (2008)
Garfinkle, David, Lim, Woei Chet, Pretorius, Frans, Steinhardt, Paul J.
A period of slow contraction with equation of state w > 1, known as an ekpyrotic phase, has been shown to flatten and smooth the universe if it begins the phase with small perturbations. In this...
Evolution to a smooth universe in an ekpyrotic contracting phase with w>1 (2008)
Garfinkle, David, Lim, Woei Chet, Pretorius, Frans, Steinhardt, Paul J.
A period of slow contraction with equation of state w>1, known as an ekpyrotic phase, has been shown to flatten and smooth the universe if it begins the phase with small perturbations. In this paper,...
New explicit spike solution -- non-local component of the generalized Mixmaster attractor (2007)
By applying a standard solution-generating transformation to an arbitrary vacuum Bianchi type II solution, one generates a new solution with spikes commonly observed in numerical simulations. It is...
Cosmology: a bird's eye view (2006)
Coley, Alan A., Hervik, Sigbjorn, Lim, Woei Chet
In this essay we discuss the difference in views of the Universe as seen by two different observers. While one of the observers follows a geodesic congruence defined by the geometry of the...
The late-time behaviour of vortic Bianchi type VIII Universes (2005)
Hervik, Sigbjorn, Lim, Woei Chet
We use the dynamical systems approach to investigate the Bianchi type VIII models with a tilted $\gamma$-law perfect fluid. We introduce expansion-normalised variables and investigate the late-time...
Asymptotic silence-breaking singularities (2005)
Lim, Woei Chet, Uggla, Claes, Wainwright, John
We discuss three complementary aspects of scalar curvature singularities: asymptotic causal properties, asymptotic Ricci and Weyl curvature, and asymptotic spatial properties. We divide scalar...
The Dynamics of Inhomogeneous Cosmologies (2004)
In this thesis we investigate cosmological models more general than the isotropic and homogeneous Friedmann-Lemaitre models. We focus on cosmologies with one spatial degree of freedom, whose matter...
Asymptotic silence of generic cosmological singularities (2004)
Andersson, Lars, Van Elst, Henk, Lim, Woei Chet, Uggla, Claes
In this letter we investigate the nature of generic cosmological singularities using the framework developed by Uggla et al. We do so by studying the past asymptotic dynamics of general vacuum G2...
The Dynamics of Inhomogeneous Cosmologies (2004)
In this thesis we investigate cosmological models more general than the isotropic and homogeneous Friedmann-Lemaître models. We focus on cosmologies with one spatial degree of freedom, whose...
The Dynamics of Inhomogeneous Cosmologies (2004)
In this thesis we investigate cosmological models more general than the isotropic and homogeneous Friedmann-Lemaître models. We focus on cosmologies with one spatial degree of freedom, whose...
The Dynamics of Inhomogeneous Cosmologies (2004)
In this thesis we investigate cosmological models more general than the isotropic and homogeneous Friedmann-Lemaître models. We focus on cosmologies with one spatial degree of freedom, whose...
The Dynamics of Inhomogeneous Cosmologies (2004)
In this thesis we investigate cosmological models more general than the isotropic and homogeneous Friedmann-Lemaître models. We focus on cosmologies with one spatial degree of freedom, whose...
The Dynamics of Inhomogeneous Cosmologies (2004)
In this thesis we investigate cosmological models more general than the isotropic and homogeneous Friedmann-Lemaître models. We focus on cosmologies with one spatial degree of freedom, whose...
Asymptotic isotropization in inhomogeneous cosmology (2003)
Lim, Woei Chet, Van Elst, Henk, Uggla, Claes, Wainwright, John
In this paper we investigate asymptotic isotropization. We derive the asymptotic dynamics of spatially inhomogeneous cosmological models with a perfect fluid matter source and a positive cosmological...