145 citations · 2.2k across the 67 of their papers we have counts for
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gr-qc2020★ 3 cited
Bifurcations and Chaos in Hořava-Lifshitz Cosmology
Juliette Hell, Phillipo Lappicy, Claes Uggla
The nature of generic spacelike singularities in general relativity is connected with first principles, notably Lorentzian causal structure, scale invariance and general covariance…
gr-qc2020★ 9 cited
Dynamical systems in perturbative scalar field cosmology
Artur Alho, Claes Uggla, John Wainwright
We derive a new \emph{regular} dynamical system on a 3-dimensional \emph{compact} state space describing linear scalar perturbations of spatially flat Robertson-Walker geometries f…