EBWeyl: a Code to Invariantly Characterize Numerical Spacetimes

• DOI: 10.48550/arxiv.2211.08133
• Publication Date: 2022-01-01
• Authors: Robyn L. Munoz; Marco Bruni
• Keywords: Code (set theory)

In order to invariantly characterise spacetimes resulting from cosmological simulations in numerical relativity, we present two different methodologies compute the electric and magnetic parts of Weyl tensor, $E_{αβ}$ $B_{αβ}$, which construct scalar invariants scalars. The first method is geometrical, computing these tensors full metric, second uses 3+1 slicing formulation. We developed a code for each tested them on five analytic metrics, derived $B_{αβ}$ various scalars constructed with computer algebra software. find excellent agreement between results. outperforms geometrical computational convenience accuracy; this basis make it publicly available github name EBWeyl [ https://github.com/robynlm/ebweyl ]. emphasize that post-processing applicable any gauge.