2 papers
astro-ph.CO2018
The unphysical character of dark energy fluids
Ronaldo C. Duarte, Edésio M. Barboza, Everton M. C. Abreu +1
It is well known that, in the context of general relativity, an unknown kind of matter that must violate the strong energy condition is required to explain the current accelerated…
math.AP2017
A Berestycki-Lions type result and applications
Claudianor O. Alves, Ronaldo C. Duarte, Marco A. S. Souto
In this paper we show an abstract theorem involving the existence of critical points for a functional , which permit us to prove the existence of solutions for a large class of…