SpECTRE
v2023.05.16

The CCZ4 temporary expression \(\alpha (R + 2 \nabla_k Z^k)\). More...
#include <TempTags.hpp>
Public Types  
using  type = Scalar< DataType > 
The CCZ4 temporary expression \(\alpha (R + 2 \nabla_k Z^k)\).
Here, \(\alpha\) is the lapse defined by gr::Tags::Lapse
and \((R + 2 \nabla_k Z^k)\) is the Ricci scalar plus twice the divergence of the spatial Z4 constraint defined by Ccz4::Tags::RicciScalarPlusDivergenceZ4Constraint
.