On the Creation of the Universe out of Nothing
We explain how the Universe was created with no expenditure of energy or initial mass.
gr-qc↗
arXiv subjects
Luis Augusto Trevisan
Publications and source records attributed to Luis Augusto Trevisan.
Prey-predator modeling of CO2 atmospheric concentration
In this work we propose a mathematical model, based in a modified version of the Lotka-Volterra prey-predator equations, to predict the increasing in CO2 atmospheric concentration. We consider how the photosynthesis rate has changed with the increase of CO2 and how this affects plant reproduction and CO2 absorptions rates. Total CO2 emissions (natural and manmade) and biomass numerical parameter changes are considered. It is shown that the atmospheric system can be in equilibrium under some specific conditions, and also some comparisons with historical are done.
q-bio.OT↗
A numerical analysis for G(t) in a scalar tensor theory
We calculated the evolution of the Newton gravitational in a scalar tensor theory, using parameters that holds for the present Universe. We analised the evolution from one billion of years ago.
gr-qc↗