1 citations · 1 across the 4 of their papers we have counts for
4 papers
Absence of eigenvalues in the continuous spectrum for Klein-Gordon operators
R. Ferreira, F. N. Lima, A. S. Ribeiro
We construct the one-dimensional analogous of von-Neumann Wigner potential to the relativistic Klein-Gordon operator, in which is defined taking asymptotic mathematical rules in or…
Mass spectrum of scalar and gauge fields in the cosmological multiply warped brane-world
A. S. Ribeiro, G. Alencar, R. R. Landim +1
In this paper, we compute the massive modes of scalar and gauge fields in a multiply warped brane-world scenario in six-dimensional spacetime with a Freedman-Robertson-Walker (FRW)…
An exact solution of the orbit equation for a massive particle in Schwarzschild metric
A. S. Ribeiro, F. N. Lima
In this paper, we consider a spherically curved symmetric spacetime to exact solving the orbit equation of a massive particle by using Jacobi's elliptic functions. Generally, the s…
Mathematical methods of diagonalization of quadratic forms applied to the study of stability of thermodynamic systems
F. N. Lima, J. M. De Sousa
In this paper, we use quadratic forms diagonalization methods applied to the function thermodynamic energy to analyze the stability of physical systems. Taylor's expansion was usef…