532 citations · 1.1k across the 27 of their papers we have counts for
27 papers
Mathematical Features of Several Cosmological Models
Luis P. Chimento, Alejandro S. Jakubi
Einstein equations for several matter sources in homogeneous, isotropic metric are shown to reduce to a second order nonlinear ordinary differential equation. An analysis of its so…
Evolution of a universe filled with a causal viscous fluid
Luis P. Chimento, Alejandro S. Jakubi
The behaviour of solutions to the Einstein equations with a causal viscous fluid source is investigated. In this model we consider a spatially flat Robertson-Walker metric, the bul…
Exact self-interacting scalar field cosmologies
Luis P. Chimento, Adriana E. Cossarini, Alejandro S. Jakubi
We solve isotropic, homogeneous cosmological models containing a self-interacting scalar field. Calculations are performed in four and two-dimensional spacetimes. We find several e…
The branching problem in generalized power solutions to differential equations
Alejandro S. Jakubi
Generalized power asymptotic expansions of solutions to differential equations that depend on parameters are investigated. The changing nature of these expansions as the parameters…
An exact model of conformal quintessence
Luis P. Chimento, Alejandro S. Jakubi, Diego Pavon
A non--minimally coupled quintessence model is investigated and the conditions for a stationary solution to the coincidence problem are obtained. For a conformally coupled scalar f…
Dark energy, dissipation and the coincidence problem
Luis P. Chimento, Alejandro S. Jakubi, Diego Pavon
In a recent paper we showed that a quintessence scalar field plus a dissipative matter fluid can drive late cosmic accelerated expansion and simultaneously solve the coincidence pr…