We review analytical solutions of the Einstein equations which are expressed in terms of
elementary functions and describe Friedmann–Lemaître–Robertson–Walker universes …

We reveal an $\mathfrak {iso}(2, 1) $ Poincar\'e algebra of conserved charges associated
with the dynamics of the interior of black holes. The action of these Noether charges …

We investigate the phase space symmetries and conserved charges of homogeneous
gravitational minisuperspaces. These (0+ 1)-dimensional reductions of general relativity are …

We prove that the simplest gravitational symmetry-reduced models describing cosmology
and black hole mechanics are invariant under the Schrödinger group. We consider the flat …

This thesis is dedicated to the study of symmetries in reduced models of gravity, with some
frozen degrees of freedom. We focus on the minisuperspace reduction whith a finite number …

We perform a detailed study of the integrability of the Hořava-Lifshitz scalar field cosmology
in a Friedmann-Lemaître-Robertson-Walker background space-time. The approach we …

A new symmetry of the spatially flat Einstein–Friedmann equations | The European Physical
Journal C Skip to main content Advertisement SpringerLink Account Menu Find a journal …

In the present work we revisit the axisymmetric Bianchi VIII and IX models. At the classical
level we reproduce the known analytic solution, in a novel way making use of two quadratic …

We find the symmetry generators for the Friedman equations emanating from a perfect fluid
source in the presence of a cosmological constant term. The relevant dynamics are shown to …

We show that the (symmetry-reduced) gravitational sectors describing i) the flat FRLW
cosmology filled with a massless scalar field and ii) the Schwarzschild black hole mechanics …