SpECTRE
v2024.04.12
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Compute item to get the trace of extrinsic curvature from generalized harmonic variables and the spacetime normal vector. More...
#include <ExtrinsicCurvature.hpp>
Public Types | |
using | argument_tags = tmpl::list< gr::Tags::ExtrinsicCurvature< DataVector, SpatialDim, Frame >, gr::Tags::InverseSpatialMetric< DataVector, SpatialDim, Frame > > |
using | return_type = Scalar< DataVector > |
using | base = gr::Tags::TraceExtrinsicCurvature< DataVector > |
Public Types inherited from gr::Tags::TraceExtrinsicCurvature< DataVector > | |
using | type = Scalar< DataVector > |
Static Public Attributes | |
static constexpr auto | function |
Compute item to get the trace of extrinsic curvature from generalized harmonic variables and the spacetime normal vector.
See extrinsic_curvature()
for how the extrinsic curvature \( K_{ij}\) is computed. Its trace is taken as
\begin{align} tr(K) &= g^{ij} K_{ij}. \end{align}
Can be retrieved using gr::Tags::TraceExtrinsicCurvature
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staticconstexpr |