9 citations · 10 across the 4 of their papers we have counts for
4 papers
The choice of variables in cosmological dynamical systems
Christian G. Boehmer, Antonio d'Alfonso del Sordo
Dynamical systems techniques are a powerful tool to analyse systems of ordinary differential equations, written in an appropriate form. For a given theory of gravity, the cosmologi…
Cosmological dynamical systems of non-minimally coupled fluids and scalar fields
Hala A. Ashi, Christian G. Boehmer, Antonio d'Alfonso del Sordo +1
We study the cosmological dynamics of non-minimally coupled matter models using the Brown's variational approach to relativistic fluids in General Relativity. After decomposing the…
Azimuthal geodesics in closed FLRW cosmological models
Christian G. Boehmer, Antonio d'Alfonso del Sordo, Betti Hartmann +1
We study geodesics in Friedmann-Lema{\^ı}tre-Robertson-Walker (FLRW) cosmological models and give the full set of solutions. For azimuthal geodesics, in a closed universe, we give…
Cosmological fluids with boundary term couplings
Christian G. Boehmer, Antonio d'Alfonso del Sordo
Cosmological models can be studied effectively using dynamical systems techniques. Starting from Brown's formulation of the variational principle for relativistic fluids, we introd…