84 citations · 656 across the 80 of their papers we have counts for
5 papers · 1 filter
Dispersive Friedmann universes and synchronization
Spiros Cotsakis
We introduce consideration of dispersive aspects of standard perfect fluid Friedmann cosmology and study the new qualitative behaviours of cosmological solutions that emerge as the…
Dynamical synchronization, the horizon problem, and initial conditions for inflation
Spiros Cotsakis
We consider the evolution of homogeneous cosmologies towards the future in a dynamical systems formulation. Using a variational equation approach, we show that there is a short per…
Localizing branes with bifurcating bulks
Ignatios Antoniadis, Spiros Cotsakis, John Miritzis
We study the problem of evolution of bulk 5-fluids having an embedded braneworld with a flat, de Sitter, or anti-de Sitter geometry. We introduce new variables to express the Einst…
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…
100 years of mathematical cosmology: Models, theories, and problems
Spiros Cotsakis, Alexander P. Yefremov
An elementary survey of mathematical cosmology is presented. We cover certain key ideas and developments in a qualitative way, from the time of the Einstein static universe in 1917…