SpECTRE
v2023.03.09

Auxiliary variable which is analytically the spatial derivative of the spacetime metric. More...
#include <Tags.hpp>
Public Types  
using  type = tnsr::iaa< DataVector, Dim, Frame > 
Auxiliary variable which is analytically the spatial derivative of the spacetime metric.
If \(\psi_{ab}\) is the spacetime metric then we define \(\Phi_{iab} = \partial_i \psi_{ab}\)