SpECTRE
v2023.12.08

The CCZ4 temporary expression \(K  2 \Theta c\). More...
#include <TempTags.hpp>
Public Types  
using  type = Scalar< DataType > 
The CCZ4 temporary expression \(K  2 \Theta c\).
Here, \(K\) is the trace of the extrinsic curvature defined by gr::Tags::TraceExtrinsicCurvature
, \(\Theta\) is the projection of the Z4 fourvector along the normal direction, and \(c\) controls whether to include algebraic source terms proportional to \(\Theta\).