SpECTRE
v2024.02.05

Identity which is analytically negative one half the spatial derivative of the inverse conformal spatial metric. More...
#include <Tags.hpp>
Public Types  
using  type = tnsr::iJJ< DataType, Dim, Frame > 
Identity which is analytically negative one half the spatial derivative of the inverse conformal spatial metric.
We define:
\begin{align} D_k{}^{ij} &= \tilde{\gamma}^{in} \tilde{\gamma}^{mj} D_{knm} = \frac{1}{2} \partial_k \tilde{\gamma}^{ij} \end{align}
where \(\tilde{\gamma}^{ij}\) and \(D_{ijk}\) are the inverse conformal spatial metric and the CCZ4 auxiliary variable defined by Ccz4::Tags::FieldD
, respectively.