145 citations · 2.2k across the 67 of their papers we have counts for
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gr-qc2018★ 10 cited
Dynamics of cosmological perturbations at first and second order
Claes Uggla, John Wainwright
In this paper we give five gauge-invariant systems of governing equations for first and second order scalar perturbations of flat Friedmann-Lemaître universes that are minimal in t…
gr-qc2018★ 10 cited
Second order cosmological perturbations: simplified gauge change formulas
Claes Uggla, John Wainwright
In this paper we present a new formulation of the change of gauge formulas in second order cosmological perturbation theory which unifies and simplifies known results. Our approach…