13 papers
Absence of singularities in a cosmological perfect fluid solution
F. J. Chinea, L. Fernández-Jambrina, J. M. M. Senovilla
In this lecture we will show some properties of a singularity-free solution to Einstein's equations and its accordance with some theorems dealing with singularities. We will also d…
Surface densities in General Relativity
F. J. Chinea, L. Fernández-Jambrina
In this lecture we deal with the construction of surface densities for the angular momentum of the sources of asymptotically flat vacuum stationary axisymmetric spacetimes. These s…
Non-regular Potentials and Sources for Static Axisymmetric Electrovacs
L. Fernández-Jambrina
In this lecture a new formalism for constructing electromagnetic surface sources for static axisymmetric electrovacs is presented. The electrostatic and magnetostatic sources are d…
Magnetic Moment Density from Lack of Smoothness of the Ernst Potential
L. Fernández-Jambrina
In this talk it is shown a way for constructing magnetic surface sources for stationary axisymmetric electrovac spacetimes possessing a non-smooth electromagnetic Ernst potential.…
Non-singular inhomogeneous stiff fluid cosmology
L. Fernández-Jambrina
In this talk we show a stiff fluid solution of the Einstein equations for a cylindrically symmetric spacetime. The main features of this metric are that it is non-separable in como…
On non-singular inhomogeneous cosmological models
L. Fernández-Jambrina, L. M. González-Romero
In this talk we would like to review recent results on non-singular cosmological models. It has been recently shown that among stiff perfect fluid inhomogeneous spacetimes the abse…