We review spherical and inhomogeneous analytic solutions of the field equations of Einstein
and of scalar–tensor gravity, including Brans–Dicke theory, non-minimally (possibly …

In Part I of this paper certain well known results concerning the Schwarzschild interior
solution are generalized to more general static fluid spheres in the form of inequalities …

We ask the following question: Of the exact solutions to Einstein's equations extant in the
literature, how many could represent the field associated with an isolated static spherically …

Interior perfect fluid solutions for the Reissner-Nordström metric are studied on the basis of a
new classification scheme. It specifies which two of the characteristics of the fluid are given …

In this work, we construct stellar models based on the complexity factor as a supplementary
condition which allows to close the system of differential equations arising from the …

The gravastar picture is an alternative model to the concept of a black hole, where there is
an effective phase transition at or near where the event horizon is expected to form, and the …

An algorithm based on the choice of a single monotone function (subject to boundary
conditions) is presented which generates all regular static spherically symmetric perfect-fluid …

Assuming that the physical three‐space in a relativistic superdense star has the geometry of
a three‐spheroid, a static spherically symmetric model based on an analytic closed‐form …

In previous work, we undertook to study static and anisotropic content in f (T) theory and
obtained new spherically symmetric solutions considering a constant torsion and some …

We provide an exhaustive analysis of the complete set of solutions of the equations of stellar
equilibrium under semiclassical effects. As classical matter we use a perfect fluid of constant …