33 citations · 148 across the 22 of their papers we have counts for
6 papers · 1 filter
Singularities of varying light speed cosmologies
John Miritzis, Spiros Cotsakis
We study the possible singularities of isotropic cosmological models that have a varying speed of light as well as a varying gravitational constant. The field equations typically r…
Bel-Robinson energy and the nature of singularities in isotropic cosmologies
Ifigeneia Klaoudatou, Spiros Cotsakis
We review our recent work on the classification of finite time singularities that arise in isotropic universes. This scheme is based on the exploitation of the Bel Robinson energy…
The Dominant Balance at Cosmological Singularities
Spiros Cotsakis, John D. Barrow
We define the notion of a finite-time singularity of a vector field and then discuss a technique suitable for the asymptotic analysis of vector fields and their integral curves in…
Future Singularities and Completeness in Cosmology
Spiros Cotsakis
We review recent work on the existence and nature of cosmological singularities that can be formed during the evolution of generic as well as specific cosmological spacetimes in ge…
Cosmological Singularities and Bel-Robinson Energy
Spiros Cotsakis, Ifigeneia Klaoudatou
We consider the problem of describing the asymptotic behaviour of \textsc{FRW} universes near their spacetime singularities in general relativity. We find that the Bel-Robinson ene…
Singular Isotropic Cosmologies and Bel-Robinson Energy
Spiros Cotsakis, Ifigeneia Klaoudatou
We consider the problem of the nature and possible types of spacetime singularities that can form during the evolution of \emph{FRW} universes in general relativity. We show that b…