3 papers
gr-qc2025
Qualitative analysis of a quasi-magnetic universe
Alan G. Cesar, Mario Novello, Eduardo Bittencourt +1
We investigate the cosmological dynamics induced by nonlinear electrodynamics in a homogeneous and isotropic universe, focusing on the role of primordial electromagnetic fields wit…
gr-qc2025
Qualitative analysis of viscous cosmology
A. G. Cesar, Mario Novello
We analyze the effect of higher order viscosity corrections in a spatially homogeneous and isotropic universe. The viscous effects are modeled by introducing a second-order term to…
gr-qc2025
Friedmann's Universe Controlled by Gauss-Bonnet Modified Gravity
Fábio dos Anjos, Mario Novello
The accepted idea that the expansion of the universe is accelerating needs, for compatibility to general relativity, the introduction of some unusual forms of matter. However, seve…