13 citations · 21 across the 9 of their papers we have counts for
9 papers
Quasi-isotropic Asymptotic Expansions in Varying Speed of Light Cosmologies
Dimitrios Trachilis
We generalize the quasi-isotropic solution of the Einstein equations near a cosmological initial singularity to models with a varying speed of light and/or a varying gravitational…
Asymptotic analysis of varying light speed cosmologies
Dimitrios Trachilis
We investigate potential singularities in isotropic cosmological models featuring a time-varying speed of light and the gravitational constant. The governing field equations genera…
Sudden Shock Waves in modified gravity
Ignatios Antoniadis, Spiros Cotsakis, Dimitrios Trachilis
We construct a generic asymptotic solution for modified gravity near a sudden singularity. This solution contains a fluid source with no equation of state and is function-counting…
The conformal cosmological potential
Spiros Cotsakis, Ifigeneia Klaoudatou, Georgios Kolionis +2
We discuss qualitative features of the conformal relation between certain classes of gravity theories and general relativity, common to different themes such as , Brans-Dicke…
The radiation instability in modified gravity
Spiros Cotsakis, Dimitrios Trachilis
We study the problem of the instability of inhomogeneous radiation universes in quadratic lagrangian theories of gravity written as a system of evolution equations with constraints…
The Generic Sudden Singularity in Brans-Dicke Theory
John D. Barrow, Spiros Cotsakis, Dimitrios Trachilis
We construct a formal asymptotic series expansion for a general solution of the Brans-Dicke equations with a fluid source near a sudden singularity. This solution contains eleven i…