Cosmological models typically neglect the complicated nature of the spacetime mani-fold at
small scales in order to hypothesize idealized general relativistic solutions for describing the …

The possibility of obtaining symbolic expressions for cosmic backreaction is explored
through a case study of so-called 2-region models. By using the publicly available symbolic …

Measurements of the cosmic redshift drift—the change in redshift of a source over time—will
enable independent detection of cosmological expansion thanks to the immense precision …

Relativistic cosmology can be formulated covariantly, but in dealing with numerical relativity
simulations a gauge choice is necessary. Although observables should be gauge-invariant …

We introduce a spatial averaging scheme and use it to study the evolution of spatial
averages in large-scale simulations of cosmological structure formation performed with the …

We apply and extend standard tools for void statistics to cosmological simulations that solve
Einstein's equations with numerical relativity (NR). We obtain a simulated void catalogue …

We consider the form of Hubble diagrams that would be constructed by observers in
universes that are homogeneous but anisotropic, when averaged over suitably large length …

This review is an up-to-date account of the use of numerical relativity to study dynamical,
strong-gravity environments in a cosmological context. First, we provide a gentle introduction …

We study the impact of nearby inhomogeneities on an observer's inference of the Hubble
constant. Large-scale structures induce a dependence of cosmological parameters on …

Cosmology is built on a relativistic understanding of gravity, where the geometry of the
Universe is dynamically determined by matter and energy. In the cosmological concordance …