SpECTRE
v2023.12.08

The trace of the tracefree part of the extrinsic curvature. More...
#include <Tags.hpp>
Public Types  
using  type = Scalar< DataType > 
The trace of the tracefree part of the extrinsic curvature.
We define:
\begin{align} tr\tilde{A} &= \tilde{\gamma}^{ij} \tilde{A}_{ij} \end{align}
where \(\tilde{\gamma}^{ij}\) is the inverse conformal spatial metric defined by Ccz4::Tags::InverseConformalMetric
and \(\tilde{A}_{ij}\) is the tracefree part of the extrinsic curvature defined by Ccz4::Tags::ATilde
.