We consider a nonsingular origin for the universe starting from an Einstein static universe,
the so-called" emergent universe" scenario, in the framework of a theory which uses two …

A new class of gravity–matter models defined in terms of two independent non-Riemannian
volume forms (alternative generally covariant integration measure densities) on the space …

A unification of dark matter and dark energy based on a dynamical spacetime theory is
suggested. By introducing a dynamical spacetime vector field χ μ as a Lagrange multiplier …

A unified multiscalar field model with three flat regions is discussed. The three flat regions
are the inflation, early-and late dark energy epochs. The potential is obtained by a …

We consider a modified gravity plus single scalar-field model, where the scalar Lagrangian
couples symmetrically both to the standard Riemannian volume-form (spacetime integration …

Here we generalize ideas of unified dark matter–dark energy in the context of two measure
theories and of dynamical space time theories. In two measure theories one uses metric …

Generalized ideas of unified dark matter and dark energy in the context of dynamical space
time theories with a diffusive transfer of energy are studied. The dynamical space-time …

A two scalar field model that incorporates non Riemannian Measures of integration or
usually called Two Measures Theory (TMT) is introduced, in order to unify the early and …

There is great interest in the construction of brane worlds, where matter and gravity are
forced to be effective only in a lower dimensional surface, the brane. How these could …

A recently proposed Dynamical Space-time Cosmology (DSC) that unifies dark energy and
dark matter is studied. The general action of this scenario includes a Lagrange multiplier …