Dynamical systems theory is especially well-suited for determining the possible asymptotic
states (at both early and late times) of cosmological models, particularly when the governing …

We investigate spatially flat isotropic cosmological models which contain a scalar field with
an exponential potential and a perfect fluid with a linear equation of state. We include an …

We present self-similar cosmological solutions for a barotropic fluid plus scalar field with
Brans-Dicke-type coupling to the spacetime curvature and an arbitrary power-law potential …

We investigate the observational constraints on inflationary parameters in the context of a
holographic cosmology with an induced gravity correction. We consider two situations where …

This work deals with the presence of the cuscuton term in the otherwise standard dark
energy evolution under the usual FLRW background. We disclose a first-order framework …

In the evolution of late universe, the main source of matter are Dark energy and Dark matter.
They are indirectly detected only through their gravitational manifestations. So the possibility …

The purpose of this paper is to establish possible implications of the de Broglie–Bohm
interpretation of quantum mechanics towards superstring cosmological dynamics. In this …

A complete qualitative study of the dynamics of string cosmologies is presented for the class
of isotopic curvature universes. These models are of Bianchi types I, V and IX and reduce to …

In the standard cosmological paradigm the Universe is described by an expanding
Friedmann-Robertson-Walker (FRW) model with a hot big bang. Mathematical cosmology …

Recent astronomical data suggests that the universe is in a state of accelerated expansion.
The purpose of this thesis is not to refute the methods of, or reliability of such observations …